WO2017167134A1

WO2017167134A1 - Planetary centerless lathe having adjustable machining radius

Info

Publication number: WO2017167134A1
Application number: PCT/CN2017/078076
Authority: WO
Inventors: 赵丰; 何惜港; 王黎峰; 牛志岭
Original assignee: 邯郸鸿力轴承有限公司
Priority date: 2016-03-28
Filing date: 2017-03-24
Publication date: 2017-10-05
Also published as: CN105618791A; CN105618791B

Abstract

Provided is a planetary centerless lathe having an adjustable machining radius, comprising a planetary holder, a planetary power mechanism, and a blade adjustment mechanism. The planetary holder comprises a disc (1), a support housing (18) arranged on one side of the disc (1) and fixedly connected to the disc (1), and a hollow bushing (9) arranged on the other side of the disc (1) and fixedly connected to the disc (1); the hollow bushing (9) is fixedly equipped with a bearing assembly (2), a planetary-gear support body (3), and a planetary gear ring (4), in sequence; a sun center gear (16) receives power from a first powered member and transmits it to the planetary gear ring (4) and planetary-gear support body (3) to rotate them; when the planetary-gear support body (3) rotates, it drives a parallelogram blade support, bearing assembly (2), outer spline spacer (11), and ball-screw drive slider (13) to rotate concomitantly; the end section of a blade connecting rod (7) is connected to a blade (8); said blade (8) is perpendicular to a to-be-machined workpiece (15) and machines the workpiece (15); during the process of machining, the second powered member drives the disc to push the prong (12) and thus drive the ball-screw drive slider (13) to move along the axis of the hollow bushing (9); the outer screw thread of the ball-screw drive slider (13) meshes with the helical teeth of the fan-shaped gear (10), causing the teeth of the fan-shaped gear (10) to rotate at a certain angle, thereby adjusting the machining radius of the blade with respect to the workpiece; thus the blade machining radius is adjusted online, a plurality of workpieces may be machined at the same time, and machining is highly efficient.

Description

Description: A planetary centerless lathe with adjustable machining radius

[0001] The present invention belongs to the technical field of metal cutting, and particularly relates to a planetary centerless lathe with adjustable processing radius.

[0002] The centerless lathe is mainly used for processing the outer surface of cylindrical rods and tubes to remove surface hardened layers, cracks and other defects, thereby improving the quality of cylindrical rods and tubes, which is more conventional than conventional ones. On the lathe, the central frame is used to support the cylindrical rods and the processing method of the tubes. With the increasing use of the centerless lathes, the problems of the traditional centerless lathes have gradually emerged.

[0003] The transmission structure of the centerless lathe is mostly a wheel drive. By fixing a plurality of turning tools adjusted by hydraulic or mechanical structure on the rotating bowl, the workpiece turning tool is circularly moved around the workpiece to realize the turning purpose. At present, the cutter head for the centerless lathe is a manual single-handle cutter, and the clamp-out method is the roller clamp. This structure needs to be adjusted after the initial tool setting and the tool wear, and the tool must be manually adjusted. The knives method not only wastes the daytime, but also has low adjustment precision, and needs to be adjusted repeatedly to achieve the required size for processing. The pinch rolls will inevitably cause continuous indentation on the processed bars, affecting the processing quality, and It brings difficulties to the subsequent finishing, and the centerless lathe has low processing efficiency and stability.

technical problem

[0004] In order to overcome the above drawbacks, an object of the present invention is to provide a planetary centerless lathe which has high production efficiency and can effectively adjust the machining radius.

Problem solution

Technical solution

[0005] The object of the present invention is achieved by the following technical solutions:

[0006] A planetary centerless lathe with adjustable machining radius includes: a planetary mount, a planetary power mechanism, and a tool adjustment mechanism; the planetary mount includes: a disc disposed on a side of the disc and the a support housing fixedly connected to the disc, a hollow sleeve disposed on the other side of the disc and fixedly coupled to the disc; The number of hollow bushings is more than four, and is evenly distributed at the center of the disc; the corresponding hollow hole of the disc is provided with a feeding hole for facilitating the passage of the workpiece, and the center of the disc is provided with a central hole ;

[0007] The planetary power mechanism includes: a first power member, a sun center gear, a planetary gear ring, a planetary gear support body, a bearing assembly; the first power member is fixed on a planetary mount, the sun center gear and The first power component is dynamically connected; the number of the planetary gear support body, the bearing assembly and the planetary gear ring is equal to the number of the hollow bushings, and the center of the planetary gear support body is provided with a stepped through hole, respectively a through hole and a second through hole, the second through hole has a larger aperture than the first through hole, the first through hole is fixedly mounted with a bearing assembly, and the bearing assembly is fixedly mounted on the hollow sleeve; The planetary gear support body is further provided with a flat through hole communicating with the first through hole and the second through hole, the number of the flat through holes being three or more, uniformly distributed at the center of the planetary gear support; The two sides of the through hole are located at the upper part of the second through hole, and are provided with two hinge pin holes, respectively an upper hinge pin hole and a lower hinge pin hole, and the upper hinge pin hole and the lower hinge pin hole Line perpendicular to the axis of the hollow sleeve; evenly distributed ring of the planetary gear sleeved on and fixed to the engagement of the planetary gear center of the sun gear support portion and the circumferential center of the sun gear;

[0008] The tool adjustment mechanism comprises: a second power component, a disc fork, a screw sleeve, an outer spline spacer, a parallelogram cutter; the number of the screw sleeve and the outer spline spacer The number of the hollow sleeves is equal to the number of the hollow sleeves; the center of the screw sleeve is provided with a stepped through hole, which is a third through hole and a fourth through hole respectively, and the third through hole has a larger aperture than the fourth through hole An inner spline parallel to the axis of the screw sleeve is disposed in the third through hole, and an outer circle is disposed on the outer circumference of the screw sleeve corresponding to the position of the third through hole, and the outer circumference of the screw sleeve An annular groove is disposed at a position corresponding to the fourth through hole; an outer spline is disposed on an outer circumference of the outer spline spacer, and the outer spline spacer is installed in the third through the outer spline and the inner spline a fourth through hole of the screw sleeve is sleeved on the hollow sleeve, and the outer spline spacer is fixedly mounted on the bearing assembly; the number of the parallelogram cutters is flat and the through hole is Equal in number, the parallelogram tool holder includes: sector gear, hinge pin, swing Connecting rod, sway arm connecting rod, tool connecting rod; the hinge pin shaft is divided into: an upper fixed hinge pin movably mounted in the upper hinge pin shaft hole, and a lower fixed hinge pin movably mounted in the lower hinge pin shaft hole , the upper movable hinge pin, the lower movable hinge pin; the two ends of the upper swing arm link are respectively fixedly connected with the fixed hinge pin and the upper movable hinge pin, and the two ends of the swing arm link are respectively fixedly connected and fixed a hinge pin, a lower movable hinge pin; one end of the tool link The upper hinge pin is hinged, the tool link is hinged to the lower movable hinge pin at a distance from the upper hinge pin hole and the lower hinge pin hole, and the other end of the tool link is connected with a cutter; the sector gear Mounted in the flat through hole and fixedly connected with the lower fixed hinge pin, the sector gear is provided with helical teeth, and the sector gear is meshed with the screw sleeve by the helical teeth and the outer thread; the second power The second power piece is fixedly connected to the disc fork through the center hole and drives the disc fork to move in the direction of the disc axis; the circumference of the disc fork is evenly arranged The bore is equal in number to the screw sleeve, and the screw sleeve is installed in the bore through the annular groove.

[0009] Further, the second power component comprises: a fork power screw, a worm wheel, a worm, a fork power motor, and a transmission belt; the fork power screw passes through the center hole and is fixedly connected with the disc fork. An inner hole is disposed at a center of the worm wheel, and the inner hole is provided with an internal thread. The worm wheel is sleeved on the fork power screw by an internal thread, and the worm is meshed with the worm wheel, and the worm is disposed on the worm There is a worm pulley, the fork power motor is fixedly mounted on the support housing, and the fork power motor is provided with a fork power motor pulley, and the worm pulley and the fork power motor pulley are transmitted by a transmission belt.

[0010] Further, one end of the fork power screw is provided with a fixing plate, and a boss is disposed at a center of the fixing plate

The fixing plate is uniformly provided with four or more screw holes in the fixing plate centered on the boss; the center of the disc fork is provided with a boss hole, and the disc fork is provided with a boss The hole is centered and uniformly provided with a screw-ring internal thread hole corresponding to the number of threaded holes in the fixing plate, the fork power screw is installed in the boss hole through the boss, and the screw passes through the internal thread of the disc fork The threaded hole in the hole and the fixing plate is fixedly connected with the disc fork.

[0011] Further, the support housing is provided with a screw hole position for facilitating the movement of the fork power screw.

[0012] Further, the planetary gear support body is provided with a rib plate group; the number of the rib plate groups is equal to the number of the flat through holes, and is evenly distributed at the center of the planetary gear support; the rib plate group is composed of two pieces Parallel ribs are formed, and flat through holes are formed between the two parallel ribs.

[0013] Further, end needle roller bearings are respectively mounted on both sides of the disc fork in the annular groove.

[0014] Further, the first power component is a power motor, and the power motor is provided with a motor shaft, and the motor shaft is installed in the sun center gear through a flat key.

[0015] Further, the hollow sleeve is provided with a bearing assembly limiting step; the bearing assembly comprises: an outer spacer, an inner spacer, and two angular contact ball bearings; the two angular contact ball bearings are sleeved On the hollow bushing, The inner spacer and the outer spacer are sequentially installed between the two angular contact ball bearings; the outer circumference of the hollow sleeve is provided with an external thread, and the external thread is mounted with a locking of the fixed bearing assembly. Nut.

[0016] Further, the number of the hollow bushings is four, and the number of the flat through holes on each of the planetary gear supports is four.

[0017] Further, the lathe further includes a guide roller that guides the workpiece.

Advantageous effects of the invention

Beneficial effect

[0018] The present invention provides a planetary centerless lathe with adjustable processing radius. The planetary fixture in the centerless lathe is provided with a uniformly distributed hollow sleeve, and the hollow sleeve is fixedly mounted with bearing assemblies and planetary gears in sequence. The support body and the planetary gear ring, the power of the sun center gear receiving the first power component is transmitted to the planetary gear ring of the circumference, the planetary gear ring drives the planetary gear support body to rotate, and the same disk fork is mounted on the ring of the screw sleeve In the groove, the screw sleeve is movably mounted on the hollow sleeve, and the inner spline in the third through hole of the screw sleeve is engaged with the external spline on the outer spline spacer, and the sector gear is fixedly connected by the hinge Parallel quadrilateral tool holder consisting of pin, upper swing arm link, hem arm link and tool link, planetary gear support rotating 吋 driving parallelogram tool holder, bearing assembly, external spline spacer and screw sleeve synchronization Rotating, the end of the tool connecting rod on the parallelogram tool holder is connected to the tool, the tool is to be processed perpendicularly to the workpiece, and the cutting of the workpiece is completed, and the second movement is performed during the cutting process. The driving of the disc fork further drives the screw sleeve to move along the axis of the hollow sleeve, and the external thread on the screw sleeve meshes with the helical gear on the sector gear, so that the sector gear rotates by a certain angle, thereby adjusting the parallelogram cutter The machining radius of the tool to the workpiece, the online adjustment of the tool radius, the high degree of automation, the online adjustment of the knife, the problem of the existing heartless lathe after the need to stop the manual adjustment to achieve the processing requirements, the same guarantee The precision of the knife improves the efficiency, can work stably under high-speed cutting state, and can process multiple workpieces at the same time, high processing efficiency, improve finished product precision, reduce equipment failure rate, save maintenance cost, simple structure and reasonable design. It has the advantages of convenient operation, high processing precision, wide processing range, high equipment effective power, reasonable cost performance and low manufacturing cost.

Brief description of the drawing

DRAWINGS

[0019] For ease of explanation, the present invention is described in detail by the following preferred embodiments and the accompanying drawings. 1 is a schematic cross-sectional structural view of a planetary centerless lathe with an adjustable machining radius in an unturned state according to the present invention;

2 is a schematic cross-sectional view showing a planetary centerless lathe with an adjustable machining radius in a turning state;

3 is a schematic cross-sectional view showing a planetary gear ring in a planetary centerless lathe with adjustable machining radius according to the present invention;

4 is a top view of a planetary centerless lathe with adjustable machining radius according to the present invention;

5 is a top plan view of a planetary mount in a planetary centerless lathe with adjustable machining radius according to the present invention;

6 is a half cross-sectional view of a planetary mount in a planetary centerless lathe with adjustable machining radius according to the present invention; [0026] FIG. 7 is a planetary gear support in a planetary centerless lathe with adjustable machining radius according to the present invention; An architectural schematic diagram of an angle;

8 is a schematic structural view showing another angle of a planetary gear support body in a planetary centerless lathe with an adjustable machining radius according to the present invention;

9 is a schematic structural view of an angle of a screw sleeve of a planetary centerless lathe with an adjustable processing radius according to the present invention;

10 is a schematic view showing another structure of a screw sleeve of a planetary centerless lathe with an adjustable processing radius according to the present invention;

11 is a schematic structural view showing an angle of an outer spline spacer in a planetary centerless lathe with an adjustable processing radius according to the present invention;

[0031] FIG. 12 is a schematic structural view showing another angle of an outer spline spacer in a planetary centerless lathe with an adjustable processing radius according to the present invention;

[0032] FIG. 13 is a schematic view showing the structure of a spline outer sleeve and a screw sleeve in a planetary centerless lathe with adjustable processing radius according to the present invention;

14 is a schematic structural view of a disc fork in a planetary centerless lathe with adjustable machining radius according to the present invention; [0034] FIG. 15 is a disc of a planetary centerless lathe with adjustable machining radius according to the present invention; A schematic view of the structure in which the fork is not connected to the hollow shaft sleeve;

16 is a schematic structural view of a disk fork and a hollow shaft sleeve in a planetary centerless lathe with adjustable machining radius according to the present invention; [0036] FIG. 17 is a schematic structural view of a planetary centerless lathe in which the machining radius is adjustable, in which the disc fork is not connected to the screw sleeve;

18 is a schematic structural view of a disk fork and a screw sleeve sleeve in a planetary centerless lathe with an adjustable processing radius according to the present invention;

19 is a schematic structural view showing an angle of a fork power screw in a planetary centerless lathe with an adjustable machining radius according to the present invention;

20 is a schematic structural view showing another angle of a fork power screw in a planetary centerless lathe with an adjustable machining radius according to the present invention;

[0040] wherein the reference numerals are: 1, the disc; 2, the bearing assembly; 3, the planetary gear support; 4, the planetary gear ring; 5, the hinge pin; 6, the swing arm link; 7, the tool link 8, knives; 9, hollow shaft sleeve; 10, sector gear; 11, external spline spacer; 12, disc fork; 13, screw sleeve; 14, guide roller; 1 5, workpiece; Solar center gear; 17, power motor; 18, support shell; 19, fork power screw; 20, worm gear; 21, worm; 22, worm pulley; 23, fork power motor; 24, fork power motor pulley 25, transmission belt; 26, hinge ribs; 27, feed hole; 28, center hole; 29, screw hole position; 30, bearing assembly limit step; 31, end needle roller bearing; 32, flat through hole; 33, the first through hole; 34, the second through hole; 35, the upper hinge pin hole; 36, the lower hinge pin hole; 37, the angular contact ball bearing; 38, the inner spacer; 39, the outer spacer; 40 , lock nut; 51, upper hinge pin; 5 2, fixed hinge Pin shaft; 53, lower movable hinge pin; 54, lower fixed hinge pin; 61, upper swing arm link; 62, lower swing arm link; 121, boring; 122, boss hole; 123, disc The inner threaded hole of the fork; 131, the third through hole; 132, the fourth through hole; 133, the annular groove; 191, the fixing plate; 192, the boss; 193, the threaded hole in the fixing plate.

Embodiments of the invention

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIGS. 1-20, a planetary centerless lathe with adjustable machining radius includes: a planetary mount, a planetary power mechanism, a guide roller 14, and a tool adjustment mechanism. The guide roller 14 feeds the workpiece 15 Line oriented. The planetary mount comprises: a disc 1 , a support housing 18 fixedly connected to the disc 1 on one side of the disc 1 , and a hollow sleeve 9 fixedly connected to the disc 1 on the other side of the disc 1 . The number of the hollow bushings 9 is four or more, preferably four, as shown in Fig. 5, and is evenly distributed at the center of the disk 1. A corresponding hole 27 for facilitating the passage of the workpiece 15 is disposed on the corresponding hollow sleeve 9 of the disc 1. The center of the disc 1 is provided with a central hole 28, as shown in FIG. 5-6.

[0043] The planetary power mechanism includes: a first power member, a sun center gear 16, a planetary gear ring 4, a planetary gear support 3, and a bearing assembly 2. The first power member is fixed to a planet mount, and the sun center gear 16 is powerally coupled to the first power member. The first power member is a power motor 17, and the power motor 17 is provided with a motor shaft which is mounted in the sun center gear 16 by a flat key. The planetary gear ring 4 is evenly distributed. The sun center gear 16 is meshed with the sun center gear 16 and fixedly sleeved on the planetary gear support 3. The number of the planetary gear support 3, the bearing assembly 2 and the planetary gear ring 4 is equal to the number of the hollow bushings 9. Referring to FIG. 7-8, the center of the planetary gear support body 3 is provided with a stepped through hole, which is a first through hole 33 and a second through hole 34 respectively. The second through hole 34 has a larger aperture than the first through hole. The first through hole 33 is fixedly mounted with a bearing assembly 2, and the bearing assembly 2 is fixedly mounted on the hollow sleeve 9, and the hollow sleeve 9 is provided with a bearing assembly limiting step 30 for mounting the bearing assembly 2. Referring to FIG. 3, the bearing assembly 2 includes: an outer spacer 39, an inner spacer 38, and two angular contact ball bearings 37; the two angular contact ball bearings 37 are made of high-precision angular contact ball bearings. The back-to-back configuration is sleeved on the hollow sleeve 9, and the inner spacer 38 and the outer spacer 39 are sequentially installed between the two angular contact ball bearings 37 for adjusting the distance between the two high-precision angular contact ball bearings 37. To support and adjust the role of play. The high-precision angular contact ball bearings 37 are matched and assembled in a pair according to certain preload requirements. The 0-type back-to-back configuration completely eliminates the play in the bearing when the bearing is mounted on the machine, and the ferrule and The steel ball is pre-tightened, the load line is branched to the bearing shaft, can withstand the axial load acting in two directions, can withstand the radial and axial two-way combined load mainly for radial load, and can also withstand pure Radial load, and can withstand overturning moments, provides relatively rigid bearing configurations and rotational accuracy, and can operate at higher speeds. At the same time, the outer circumference of the hollow sleeve 9 is provided with an external thread on which the lock nut 40 for fixing the bearing assembly 2 is mounted.

[0044] The planetary gear support body 3 is further provided with a flat through hole 32 communicating with the first through hole 33 and the second through hole 34, and the number of the flat through holes 32 is three or more, preferably four. As shown in Fig. 8, the center of the planetary gear support _{3 is} evenly distributed. Two sides of the flat through hole 32 are located at the upper part of the second through hole 34, and two hinge pins are arranged The holes are respectively an upper hinge pin hole 35 and a lower hinge pin hole 36. The upper hinge pin hole 35 and the lower hinge pin hole 36 are perpendicular to the axis of the hollow sleeve 9, as a preferred embodiment of the present invention, The planetary gear support 3 is provided with a rib group, the number of which is equal to the number of the flat through holes 32, and is evenly distributed at the center of the planetary gear support 3. The set of ribs consists of two parallel ribs 26, between which two flat ribs 32 are formed.

[0045] The tool adjustment mechanism comprises: a second power component, a disc fork 12, a screw sleeve 13, an external spline spacer 11, and a parallelogram cutter. The second power member is mounted in the support housing 18, and the second power member is fixedly coupled to the disc fork 12 through the center hole 28 and drives the disc fork 12 to move in the axial direction of the disc 1. The second power member includes: a fork power screw 19, a worm wheel 20, a worm 21, a fork power motor 23, and a transmission belt 25. The fork power screw 19 is fixedly connected to the disc fork 12 through the center hole 28, and one end of the fork power screw 19 is provided with a fixing plate 191, and a center of the fixing plate 191 is provided with a boss 192, the fixing plate On the 191, four or more fixing plate internal thread holes 193 are provided evenly around the boss 192, preferably six, as shown in FIG. The center of the disc fork 12 is provided with a boss hole 122. The disc fork 12 is uniformly provided with a disc fork internal thread corresponding to the number of threaded holes 193 in the fixing plate centering on the boss hole 122. The hole 123, the fork power screw 19 is mounted in the boss hole 122 through the boss 192, and the screw is fixedly connected to the disc fork 12 through the disc fork internal thread hole 123 and the fixing plate inner thread hole 193. An inner hole is disposed at a center of the worm wheel 20, and the inner hole is provided with an internal thread. The worm wheel 20 is sleeved on the fork power screw 19 by an internal thread, and the worm 2 is meshed with the worm wheel 20, the worm A worm pulley 22 is disposed on the 21, and the fork power motor 23 is fixedly mounted on the support housing 18, and the fork power motor 23 is provided with a fork power motor pulley 24, the worm pulley 22 and the fork power motor pulley 24 Between the power transmission by the transmission belt 25, the support housing 18 is provided with a screw hole 29 for facilitating the movement of the fork power screw 19, as shown in FIG.

[0046] The number of the screw sleeves 13 and the outer spline spacers 11 is equal to the number of the hollow sleeves 9. Referring to FIG. 10, the center of the screw sleeve 13 is provided with a stepped through hole, which is a third through hole 131 and a fourth through hole 132, respectively. The third through hole 131 has a larger aperture than the fourth through hole 132. An inner spline parallel to the axis of the screw sleeve 13 is disposed in the third through hole 131. The outer circumference of the screw sleeve 13 is provided with an outer circular thread at a position corresponding to the third through hole 131. The screw sleeve 13 is provided. An annular groove 133 is provided at a position corresponding to the fourth through hole 132 on the outer circumference. The outer spline spacer 11 is provided with an outer spline on the outer circumference thereof, and the outer spline spacer 11 is mounted in the third through hole 131 by the outer spline and the inner spline. The fourth through hole 132 of the screw sleeve 13 is slidably sleeved on the hollow sleeve 9 Rotating, the outer spline spacer 11 is fixedly mounted on the bearing assembly 2. The number of the parallelogram-shaped tool holders is equal to the number of the flat-shaped through-holes 32. The parallelogram-shaped tool holder includes: a sector gear 10, a hinge pin 5, a swing arm link 6, and a tool link 7; the swing arm link 6 includes : Upper swing arm link 61 and lower swing arm link 62. The hinge pin 5 is divided into: an upper fixed hinge pin 52 movably mounted in the upper hinge pin hole 35, a lower fixed hinge pin 54 movably mounted in the lower hinge pin hole 36, and a movable hinge pin 51, Lower movable hinge pin 5 3 . The upper swing arm link 61 is fixedly connected to the upper fixed hinge pin 52 and the upper movable hinge pin 51. The two ends of the swing arm link 62 are fixedly connected to the lower fixed hinge pin 54 and the lower movable hinge pin 53 respectively. . The tool connecting rod 7 end is hinged with the upper movable hinge pin shaft 51, and the tool connecting rod 7 is hinged with the lower movable hinge pin shaft 53 at a position away from the upper hinge pin hole hole 36 and the lower movable hinge pin shaft 53. The other end of 7 is connected with a cutter 8. The sector gear 10 is mounted in the flat through hole 32 and is fixedly connected to the lower fixed hinge pin 54. The sector gear 10 is provided with helical teeth. The sector gear 10 is matched with the screw sleeve by the helical teeth and the external thread. Engagement connection, see Figure 3.

[0047] The circumference of the disc fork 12 is evenly provided with a bore 121 equal to the number of the screw sleeves 13, and the screw sleeve 13 is mounted in the bore 121 through the annular groove 133. The setting of 121 not only facilitates the installation of the disc fork 12 on the screw sleeve 13, but also rotates the disc fork 12 to screw the screw sleeve 13 to the bottom circumference of the bore 121, and the sleeve is swung. 13 The stability of the linear motion control is better. Further, referring to FIG. 3, the annular needle bearing 133 has end face needle bearings 31 mounted on both sides of the circular fork 133, which facilitates the rotation of the screw sleeve 13 without being rounded. The effect of the fork fork 12.

[0048] The working principle of the planetary centerless lathe is as follows: The planetary fixing frame of the centerless lathe is provided with a uniformly distributed hollow bushing 9 on which the bearing assembly 2 and the planetary gear supporting body 3 are fixedly mounted. And the planetary gear ring 4, the sun sun gear 16 receives the power of the first power component and transmits it to the planetary gear ring 4 of the circumference. The planetary gear ring 4 drives the planetary gear support 3 to rotate, and the same disk fork 12 is mounted on the screw In the annular groove 133 of the sliding sleeve 13, when the center of the bottommost circumference of the bore 121 of the disc fork 12 does not coincide with the center of the screw sleeve 13, the disc fork 12 cannot slide the screw The sleeve 13 moves in the axial direction of the screw sleeve 13 . When the center of the bottom circumference of the bore 121 of the disc fork 12 coincides with the center of the screw sleeve 13 , the disc fork 12 can be used to move the screw The sliding sleeve 13 moves along the axial direction of the screw sleeve 13 and the movement is stable and reliable. The screw sleeve 13 is movably mounted on the hollow sleeve 9, and the inner spline in the third through hole 131 of the screw sleeve 13 is engaged with the external spline on the outer spline spacer 11, and the sector gear 10 is fixedly connected By the hinge pin 5, the upper pendulum a parallelogram tool holder composed of an arm link 61, a sway arm link 62, and a tool link 7, the length of the two hinges on the tool link 7 and the distance between the two hinge pin holes on each of the ribs 26 The same length, the planetary gear support 3 rotates to drive the parallelogram cutter holder, the bearing assembly 2, the outer spline spacer 11 and the screw sleeve 13 to rotate synchronously, and the cutter link 7 on the parallelogram cutter is connected to the cutter 8 The cutter 8 is perpendicular to the workpiece 15 to be processed, and the cutting of the workpiece 15 is completed. During the cutting process, the disc shifting fork 12 is driven by the second power member, and then the screw sleeve 13 is driven to move along the axis of the hollow sleeve 9, the screw is slippery. The outer circular thread on the sleeve 13 meshes with the helical gear on the sector gear 10, so that the sector gear 10 rotates at a certain angle, and the sector gear 10 rotates to rotate the swing arm link 6 by a certain angle, and the two equal length swing arm links 6 Forming a parallelogram tool holder with the tool link 7, the hinge pin 5, and the rib 26, the line connecting the axes of the two hinge pin holes on the rib 26 is perpendicular to the workpiece 15 to be processed, the tool link 7 Parallel to the axis of the two hinge pin shafts The line, also perpendicular to the bar 15 to be processed, causes the tool 8 mounted on the tool link 7 to also be perpendicular to the workpiece 15 to be machined, and the plurality of tools 8 simultaneously turn the workpiece 15 to be machined. The workpiece 15 to be machined moves linearly on the guide roller 14, and the four or more tools 8 simultaneously turn the workpiece 15 to be machined.

[0049] By adjusting the rotation direction of the fork power motor 23, changing the moving direction of the fork power screw 19, it is possible to change whether four or more tools 8 are turned into the workpiece 15 to be turned, or away from the The workpiece to be machined 15 is retracted and turned. When the fork power motor 23 rotates along the cymbal, the worm 21 rotates along the cymbal, and the worm wheel 20 rotates against the cymbal to drive the fork power screw 19, the screw sleeve 13 and the disc fork 1 2 moves in the axial direction of the sun center gear 16 to drive the four or more sector gears 10 and the swing arm link 6 that mesh with the screw sleeve 13 to rotate, and then drive four or more tools 8 Turning the workpiece 15 to be machined, achieving uniformity and synchronous turning of the turning operation, realizing online stepless adjustment. The tool 8 is turning the machining radius of the workpiece 15 to be processed, which is a continuous adjustment process, and can be stopped without stopping. Complete online adjustment of the machining radius tool with high degree of automation.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalents, and improvements made within the spirit and scope of the present invention should be included in the present invention. Within the scope of protection of the invention.

Claims

Claim

[Claim 1] A planetary centerless lathe having an adjustable machining radius, comprising: a planetary mount, a planetary power mechanism, and a tool adjustment mechanism; the planetary mount includes: a disc, disposed on the disc a support shell fixedly connected to the disc on the side, and a hollow sleeve fixedly connected to the disc on the other side of the disc; the number of the hollow sleeves is more than four, and the center of the disc is evenly distributed; The corresponding hollow hollow sleeve on the disc is provided with a feeding hole for facilitating the passage of the workpiece, and the center of the disc is provided with a central hole;

The planetary power mechanism includes: a first power component, a sun sun gear, a planetary gear ring, a planetary gear support body, a bearing assembly; the first power component is fixed on the planet mount, the sun center gear and the first power The number of the planetary gear support, the bearing assembly and the planetary gear ring is equal to the number of the hollow sleeves, and the center of the planetary gear support is provided with a stepped through hole, which is a first through hole And a second through hole, the second through hole has a larger aperture than the first through hole, the first through hole is fixedly mounted with a bearing assembly, and the bearing assembly is fixedly mounted on the hollow sleeve; the planetary gear a flat through hole communicating with the first through hole and the second through hole is further disposed on the support body, and the number of the flat through holes is three or more, and the center of the planetary gear support body is evenly distributed; The side of the second through hole is provided with two hinge pin holes, which are respectively an upper hinge pin hole and a lower hinge pin hole, and the upper hinge pin hole and the lower hinge pin hole are connected with The hollow sleeve axis is perpendicular; the planetary gear ring is evenly distributed on the circumference of the sun center gear and meshes with the sun center gear and is fixedly sleeved on the planetary gear support;

The tool adjustment mechanism comprises: a second power component, a disc fork, a screw sleeve, an outer spline spacer, a parallelogram cutter; the number of the screw sleeve and the outer spline spacer and the hollow shaft The number of the sleeves is equal; the center of the screw sleeve is provided with a stepped through hole, which is a third through hole and a fourth through hole respectively, and the third through hole has a larger aperture than the fourth through hole, An internal spline parallel to the axis of the screw sleeve is disposed in the third through hole, and an outer circle is disposed on the outer circumference of the screw sleeve corresponding to the third through hole, and the outer circumference of the screw sleeve corresponds to the first An annular groove is disposed at the position of the four-way hole; an outer spline is disposed on the outer circumference of the outer spline spacer, and the outer spline spacer is installed in the third through hole by the external spline and the inner spline; The screw The fourth through hole of the sliding sleeve is sleeved on the hollow sleeve, and the outer spline spacer is fixedly mounted on the bearing assembly; the number of the parallelogram holder is equal to the number of the flat through holes, and the parallelogram The tool holder includes: a sector gear, a hinge pin, an upper swing arm link, a lower swing arm link, and a tool link; the hinge pin is divided into: an upper fixed hinge pin that is movably mounted in the upper hinge pin hole, a lower fixed hinge pin installed in the lower hinge pin hole, an upper hinge pin and a lower movable hinge pin; the upper arm link is fixedly connected to the fixed hinge pin and the upper hinge pin The two ends of the sway arm link are fixedly connected to the lower fixed hinge pin and the lower movable hinge pin; one end of the tool link is hinged with the upper movable hinge pin, and the tool link is the same as the upper hinge pin hole and the lower a position of the hinge pin hole is hinged to the lower movable hinge pin, and the other end of the tool link is connected with a cutter; the sector gear is installed in the flat through hole and fixedly connected with the lower fixed hinge pin. The sector gear is provided with a helical gear, and the sector gear is meshed with the screw sleeve by a helical tooth and an external thread; the second power component is mounted in the support housing, and the second power component passes through the center The hole is fixedly connected with the disc fork and drives the disc fork to move along the axis of the disc; the circumference of the disc fork is evenly provided with a bore equal to the number of the screw sleeve, the screw slide The sleeve is mounted in the bore through the annular groove.

[Claim 2] The planetary centerless lathe with adjustable machining radius according to claim 1, wherein the second power component comprises: a fork power screw, a worm wheel, a worm, a fork power motor a transmission belt; the fork power screw rod is fixedly connected to the disc fork through the center hole, the inner end of the worm wheel is provided with an inner hole, and the inner hole is provided with an internal thread, and the worm wheel is engaged by the internal thread The worm is meshed with the worm wheel, and the worm is provided with a worm pulley. The fork power motor is fixedly mounted on the support housing, and the fork motor is provided with The fork power motor pulley is transmitted between the worm pulley and the fork power motor pulley through a transmission belt.

[Claim 3] The planetary centerless lathe with adjustable processing radius according to claim 2, wherein one end of the fork power screw is provided with a fixing plate, and the center of the fixing plate is provided with a convex The fixing plate is evenly provided with four or more screw holes in the fixing plate centered on the boss; the center of the disc fork is provided with a boss hole, and the disc fork is convex Taiwan The hole is centered and uniformly provided with a screw-ring internal thread hole corresponding to the number of threaded holes in the fixing plate, the fork power screw is installed in the boss hole through the boss, and the screw passes through the internal thread of the disc fork The threaded hole in the hole and the fixing plate is fixedly connected with the disc fork.

The planetary centerless lathe with adjustable machining radius according to claim 3, wherein the support housing is provided with a screw hole for facilitating the movement of the fork power screw according to claim 1. A planetary centerless lathe with adjustable machining radius is characterized in that: the planetary gear support body is provided with a rib plate group; the number of the rib plate groups is equal to the number of flat through holes, supported by planetary gears The center of the body is evenly distributed; the set of ribs is composed of two parallel ribs, and flat through holes are formed between the two parallel ribs. A planetary centerless lathe with adjustable machining radius according to claim 1, wherein an end face needle bearing is mounted on each side of the disc fork in the annular groove.

The planetary centerless lathe with adjustable machining radius according to claim 1, wherein the first power component is a power motor, the power motor is provided with a motor shaft, and the motor shaft passes a flat key Installed in the sun center gear.

The planetary centerless lathe with adjustable working radius according to any one of claims 1 to 7, wherein the hollow sleeve is provided with a bearing assembly limiting step; the bearing assembly comprises: a sleeve, an inner spacer, two angular contact ball bearings; the two angular contact ball bearings are sleeved on the hollow sleeve, the inner spacer and the outer spacer are sequentially installed between the two angular contact ball bearings; The outer circumference of the hollow sleeve end is provided with an external thread, and the external thread is mounted with a lock nut for fixing the bearing assembly.

A planetary centerless lathe having an adjustable machining radius according to claim 8, wherein the number of the hollow bushings is four, and the number of the flat through holes on each of the planetary gear supports is four.

A planetary centerless lathe having an adjustable machining radius according to claim 9, wherein the lathe further comprises a guide roller for guiding the workpiece.