Telescopic boring cutter mechanism

Abstract

The utility model provides a telescopic boring cutter mechanism, and belongs to the technical field of machine tools. The telescopic boring cutter mechanism comprises a front lengthening rod, a rear lengthening rod, a cutter sleeve body, a servo motor, a cutter handle, a movable lead screw, a cover plate and a mounting plate, the front lengthening rod is welded to the front end of the cutter sleeve body, the rear lengthening rod is welded to the rear end of the cutter sleeve body, the servo motor is fixed to the mounting plate, a driving belt wheel is fixed to an output shaft of the servo motor, and the cutter handle is fixed to the driving belt wheel. A limiting sleeve is fixed to the lower end of the driven belt wheel. A synchronous belt is arranged between the driving belt wheel and the driven belt wheel in a sleeving mode. A tool bit is fixed to the lower end of the tool handle through a bolt. The lower end of the movable lead screw extends into the center groove and is fixed to the bottom of the center groove through a bolt. The movable lead screw penetrates through the screw hole and is in threaded connection with the screw hole. The extending length of the tool bit can be controlled through the servo motor, and inner holes with different inner diameters can be conveniently machined.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tools and relates to a telescopic boring tool mechanism. Background Art

[0002] Under certain special working conditions, inner-hole shaft parts sometimes require deep holes with small openings and large inner diameters, or require ventral holes with small diameters at both ends and a large diameter in the middle. This requires that the cutter head must enter the interior of the part and the blade must be able to feed axially and radially at a uniform and stable speed to achieve this type of surface processing.

[0003] For example, the patent with application number CN200910219753.0 discloses a retractable boring head, including a cutter head housing, a worm wheel, a worm, a transmission cutter head and a flat key. The worm wheel and the worm are arranged in the cutter head housing, and the transmission cutter head is installed in the cutter head housing above the worm wheel. The transmission cutter head is screwed into the threaded hole on the upper part of the worm wheel with its external thread. A key chamber is provided on the cutter head housing located on one side of the transmission cutter head, one side of the flat key is installed in the key chamber, and the other side is connected to the flat key groove on the transmission cutter head. The transmission cutter head can only slide up and down along the flat key. The key chamber is provided with a locking screw for locking the transmission cutter head, and the locking screw is pressed against the flat key. The tool is installed in the tool mounting groove on the transmission cutter head. The tool mounting groove is provided with a bolt supporting the tool and a round nut screwed on the bolt. The tool is fixed to the transmission cutter head by a baffle and the bolt on the baffle. During construction, a special extended wrench can be used to rotate the worm to drive the worm wheel to rotate, and the worm wheel drives the transmission cutter head to make a radial feed motion, thereby adjusting the processing diameter of the tool installed on the transmission cutter head.

[0004] However, the above method requires a wrench to drive the worm to rotate, which makes adjustment difficult for some parts with deeper inner holes, and the adjustment accuracy is uncontrollable. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a retractable boring tool mechanism, which can control the extension length of the tool head through a servo motor to facilitate the processing of inner holes with different inner diameters.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a retractable boring tool mechanism, including a front extension rod, a rear extension rod, a tool sleeve body, a servo motor, a tool handle, a movable screw rod, a cover plate and a mounting plate, characterized in that the front extension rod is welded to the front end of the tool sleeve body, the rear extension rod is welded to the rear end of the tool sleeve body, the tool sleeve body is provided with a longitudinally penetrating mounting cavity, the cover plate is fixed to the cavity opening of the mounting cavity by bolts, the mounting plate is vertically fixed to the inner side of the cover plate and is located in the mounting cavity, the servo motor is fixed to the mounting plate, a driving pulley is fixed to the output shaft of the servo motor, and a clearance hole is provided on the cover plate to allow the tool sleeve body to move. A bearing is fixed in the positioning hole by bolts, the outer ring of the bearing is fixed to the cover plate, the inner ring of the bearing is fixed to the driven pulley, the lower end of the driven pulley is fixed with a limiting sleeve, a synchronous belt is sleeved between the driving pulley and the driven pulley, a cutter head is fixed to the lower end of the tool handle by bolts, the tool handle has a center groove, the lower end of the movable screw rod extends into the center groove and is fixed to the bottom of the center groove by bolts, the upper end of the tool handle is fixed with a guide plate by bolts, the limiting sleeve has a screw hole, the movable screw rod passes through the screw hole and is threadedly connected to the screw hole, a guide column parallel to the movable screw rod is fixed to the mounting plate, the guide plate is sleeved on the guide column and slides along the guide column.

[0007] Furthermore, a knife groove is formed at the lower end of the knife handle, and the knife head is embedded in the knife groove. The knife handle and the knife head are provided with mounting holes. The knife head is first inserted into the knife groove, and a bolt is inserted into the mounting hole to fix the knife head and the knife handle.

[0008] Furthermore, the upper end of the guide column is fixed on the cover plate.

[0009] Furthermore, a limiting block is fixed on the upper end of the movable screw rod, and the limiting block can abut against the upper end surface of the limiting sleeve after the movable screw rod moves downward a certain distance.

[0010] Furthermore, the guide plate is provided with a sliding hole for the limiting sleeve to pass through, the limiting sleeve is provided with an extended stop edge, and the guide plate can abut against the stop edge after moving up a certain distance. The guide plate is slidably matched with the limiting sleeve through the sliding hole.

[0011] Furthermore, aligned connecting holes are provided on the inner ring of the bearing, the driven pulley and the limiting sleeve, and bolts pass through the connecting holes to fix the three together so that they rotate synchronously.

[0012] The front extension rod and the rear extension rod are used to support the tool sleeve body. The outer ends of the front extension rod and the rear extension rod are fixed on the machine tool respectively. The processed product is sleeved outside the tool sleeve body. The machine tool drives the product to rotate so that the cutter head scrapes the hole wall of the product. Start the servo motor to drive the active pulley, which drives the driven pulley to rotate, and then the limit sleeve rotates relative to the moving screw, so that the moving screw drives the tool handle to move along the axial direction of the moving screw, and finally controls the extension and retraction of the tool head, which can process the complex internal contour of the product. The guide column limit guide plate can only translate along the axial direction of the guide column, so that the tool handle and tool head move more smoothly. The machine tool controls the product or the boring tool mechanism to move horizontally, which can change the processing position of the tool head, and then change the extension position of the tool head, so that different aperture contours can be processed.

[0013] Compared with the prior art, the telescopic boring tool mechanism has the following advantages:

[0014] 1. The servo motor is used to extend and retract the cutter head, and the lathe is used to process the complex internal contours. Compared with manual adjustment of the cutter head position, it has a high degree of automation and precision.

[0015] 2. The knife sheath body can be retracted into the knife sheath body to improve the protection of the knife head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the telescopic boring tool mechanism.

[0017] Figure 2 It is a cross-sectional view of the internal structure of the knife sleeve body.

[0018] In the figure, 1. front extension rod; 2. rear extension rod; 3. tool sleeve body; 4. servo motor; 5. tool handle; 6. movable screw; 7. cover plate; 71. clearance hole; 8. mounting plate; 9. bearing; 91. bearing outer ring; 92. bearing inner ring; 10. driven pulley; 11. limiting sleeve; 111. retaining edge; 12. driving pulley; 13. synchronous belt; 14. tool head; 15. center groove; 16. guide plate; 17. guide column; 18. mounting hole; 19. limiting block; 20. product. DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1-2 As shown, the telescopic boring tool mechanism includes a front extension rod 1, a rear extension rod 2, a tool sleeve body 3, a servo motor 4, a tool handle 5, a movable screw 6, a cover plate 7 and a mounting plate 8. The front extension rod 1 is welded to the front end of the tool sleeve body 3, and the rear extension rod 2 is welded to the rear end of the tool sleeve body 3. The tool sleeve body 3 is provided with a longitudinally penetrating mounting cavity, and the cover plate 7 is fixed to the cavity opening of the mounting cavity by bolts.

[0021] The mounting plate 8 is vertically fixed to the inner side of the cover plate 7 and is located in the mounting cavity. The servo motor 4 is fixed on the mounting plate 8. A driving pulley 12 is fixed on the output shaft of the servo motor 4. A clearance hole 71 is opened on the cover plate 7. A bearing 9 is fixed in the clearance hole 71 by bolts. The outer ring 91 of the bearing is fixed to the cover plate 7. The inner ring 92 of the bearing is fixed to the driven pulley 10. A limiting sleeve 11 is fixed to the lower end of the driven pulley 10. A synchronous belt 13 is sleeved between the driving pulley 12 and the driven pulley 10.

[0022] A cutter head 14 is fixed to the lower end of the knife handle 5 by bolts, a center groove 15 is opened in the knife handle 5, the lower end of the movable screw rod 6 extends into the center groove 15 and is fixed to the bottom of the center groove 15 by bolts, a guide plate 16 is fixed to the upper end of the knife handle 5 by bolts, a screw hole is opened in the limiting sleeve 11, the movable screw rod 6 passes through the screw hole and is threadedly connected with the screw hole, a guide column 17 parallel to the movable screw rod 6 is fixed on the mounting plate 8, the guide plate 16 is sleeved on the guide column 17 and slides along the guide column 17, and the upper end of the guide column 17 is fixed to the cover plate 7.

[0023] Specifically, a knife groove is formed at the lower end of the knife handle 5, and the knife head 14 is embedded in the knife groove. The knife handle 5 and the knife head 14 are provided with mounting holes 18. The knife head 14 is first inserted into the knife groove, and the knife head 14 and the knife handle 5 are fixed by inserting bolts into the mounting holes 18.

[0024] A limiting block 19 is fixed on the upper end of the movable screw rod 6 , and the limiting block 19 can abut against the upper end surface of the limiting sleeve 11 after the movable screw rod 6 moves downward a certain distance.

[0025] The guide plate 16 has a sliding hole for the limiting sleeve 11 to pass through, and the limiting sleeve 11 has an extended stop edge 111. After the guide plate 16 moves up a certain distance, it can abut against the stop edge 111. The guide plate 16 is slidably matched with the limiting sleeve 11 through the sliding hole.

[0026] The bearing inner ring 92, the driven pulley 10 and the limiting sleeve 11 are provided with aligned connecting holes, and bolts pass through the connecting holes to fix the three together so as to rotate synchronously.

[0027] The front extension rod 1 and the rear extension rod 2 are used to support the tool sleeve body 3. The outer ends of the front extension rod 1 and the rear extension rod 2 are respectively fixed on the machine tool. The product 20 to be processed is sleeved outside the tool sleeve body 3. The machine tool drives the product 20 to rotate, so that the cutter head 14 scrapes the hole wall of the product 20. Start the servo motor 4, drive the active pulley 12, drive the driven pulley 10 to rotate, and then make the limiting sleeve 11 rotate relative to the moving screw 6, so that the moving screw 6 drives the tool handle 5 to move along the axial direction of the moving screw 6, and finally control the extension and contraction of the tool head 14, so that the complex internal contour of the product 20 can be processed. The guide column 17 limits the guide plate 16 and can only translate along the axial direction of the guide column 17, so that the tool handle 5 and the tool head 14 move more smoothly. The machine tool controls the product 20 or the boring tool mechanism to move horizontally, which can change the processing position of the tool head 14, and then change the extension position of the tool head 14, so that different aperture contours can be processed.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A retractable boring tool mechanism, comprising a front extension rod, a rear extension rod, a tool sleeve body, a servo motor, a tool handle, a movable screw rod, a cover plate and a mounting plate, characterized in that: The front extension rod is welded at the front end of the tool sleeve body, and the rear extension rod is welded at the rear end of the tool sleeve body. The tool sleeve body is provided with a mounting cavity that penetrates longitudinally, and the cover plate is fixed to the cavity opening of the mounting cavity by bolts. The mounting plate is vertically fixed to the inner side of the cover plate and is located in the mounting cavity. The servo motor is fixed to the mounting plate, and a driving pulley is fixed on the output shaft of the servo motor. A clearance hole is provided on the cover plate, and a bearing is fixed in the clearance hole by bolts. The outer ring of the bearing is fixed to the cover plate, and a driven pulley is fixed to the inner ring of the bearing. A limiting sleeve is fixed to the lower end of the driven pulley, and a synchronous belt is sleeved between the driving pulley and the driven pulley. A cutter head is fixed to the lower end of the tool handle by bolts, and a center groove is provided on the tool handle. The lower end of the movable screw rod extends into the center groove and is fixed to the bottom of the center groove by bolts. A guide plate is fixed to the upper end of the tool handle by bolts, and a screw hole is provided in the limiting sleeve. The movable screw rod penetrates the screw hole and is threadedly connected to the screw hole. A guide column parallel to the movable screw rod is fixed on the mounting plate, and the guide plate is sleeved on the guide column and slides along the guide column.

2. A retractable boring tool mechanism according to claim 1, characterized in that: A knife groove is provided at the lower end of the knife handle, and the knife head is embedded in the knife groove. Both the knife handle and the knife head are provided with mounting holes.

3. A retractable boring tool mechanism according to claim 1, characterized in that: The upper end of the guide column is fixed on the cover plate.

4. A retractable boring tool mechanism according to claim 1, characterized in that: A limiting block is fixed at the upper end of the movable screw rod, and the limiting block can abut against the upper end surface of the limiting sleeve after the movable screw rod moves downward a certain distance.

5. The retractable boring tool mechanism according to claim 1, characterized in that: The guide plate is provided with a sliding hole for the limiting sleeve to pass through, and the limiting sleeve is provided with an extended stop edge. After the guide plate moves up a certain distance, it can abut against the stop edge.

6. A retractable boring tool mechanism according to claim 1, characterized in that: Aligned connection holes are provided on the inner ring of the bearing, the driven pulley and the limiting sleeve, and bolts pass through the connection holes to fix the three together so that they rotate synchronously.

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