CN212191363U - Drilling machine for machining tool rest of optical fiber cutter - Google Patents

Abstract

The utility model relates to a drilling machine for processing optic fibre cutting knife rest relates to the technical field of drilling machine, including drilling arm and fixed establishment, with fixed establishment sliding connection, fixed establishment includes unable adjustment base, drive plate and driven plate, rotates between drive plate and the driven plate to be connected with the clamping platform, and the drilling arm is located fixed establishment's top. When the tool rest blank placed horizontally is processed, the tool rest blank does not need to be taken down and vertically fixed again when the tool rest blank needs to be processed vertically, and the tool rest blank can be processed by rotating the clamping table, so that the operation is convenient.

Description

Drilling machine for machining tool rest of optical fiber cutter

Technical Field

The utility model belongs to the technical field of the technique of drilling machine and specifically relates to a drilling machine for processing optic fibre cutting knife rest is related to.

Background

The optical fiber is a commonly used material in daily life, and the optical fiber is cut by the essential requirement in the use process, so that an optical fiber cutter is needed. Referring to fig. 1, there is shown a blade holder 8 for a fiber cleaver, the blade holder 8 serving as an integral component of the fiber cleaver and serving an irreplaceable function during use. The tool rest 8 comprises a horizontal surface 81 with a large area and a vertical surface 82 with a small area, which are arranged perpendicular to each other, and two threaded holes perpendicular to the horizontal surface 81 are required to be machined in the horizontal surface 81 close to the center position and one threaded hole perpendicular to the vertical surface 82 is required to be machined in the vertical surface 82 in the machining process of the tool rest 8. And a drilling machine is needed in the production process of the tool rest 8, and the drilling machine is a machine tool mainly used for processing a drill bit on a tool rest blank.

In the prior art, reference is made to a utility model patent with an authorization publication number of CN205393601U, which discloses a numerical control drilling machine, comprising a base provided with a stand column, a slide seat driven by a first power device is slidably mounted on the stand column along a Z axis, a main shaft driven by a second power device is arranged on the slide seat, the second power device comprises a motor driven by a speed reducing mechanism, and the motor drives the main shaft; a sliding table driven by a third power device is arranged on the base below the main shaft in a sliding mode along the X axis, and a workbench driven by a fourth power device and provided with a positioning tool is arranged on the sliding table in a sliding mode along the Y axis; the first power device, the second power device, the third power device and the fourth power device are all connected with the electric control unit. The numerical control and automatic processing is realized, the processing range is wide, the processing cost is low, the processing precision is high, and the working efficiency is high; meanwhile, a speed change system is added, and particularly when a machined tool rest blank with high hardness is machined, the cutting force and the cutting amount of a cutter are greatly improved through the driving of a speed reducing mechanism, and the pressure of a motor is relieved.

The above prior art solutions have the following drawbacks: the processing tool rest blank has the advantages that only one surface of the tool rest blank placed horizontally can be processed, when the vertical surface of the tool rest blank needs to be processed, the tool rest blank needs to be taken down and vertically fixed again, and the processing operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drilling machine for processing optic fibre cutting knife rest, it has the condition that does not need the manual work to trade the face to the knife rest blank under, carries out the effect of processing to two faces that the knife rest blank intersects perpendicularly.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a drilling machine for processing a tool rest of an optical fiber cutter comprises a drilling arm and a fixing mechanism, wherein the drilling arm is positioned above the fixing mechanism, is connected with a fixed mechanism in a sliding way, the fixed mechanism comprises a fixed base, a driving plate and a driven plate, the driving plate and the driven plate are arranged oppositely and are connected to the upper surface of the fixed base in a sliding way, a clamping table is rotationally connected between the driving plate and the driven plate, the driving plate is provided with a driving hole, the driven plate is provided with a driven hole, the two ends of the clamping table are provided with a driving shaft and a driven shaft, the driving shaft is rotatably inserted in the driving hole and extends out of the driving plate, a turntable is fixedly arranged at the end part of the driving shaft far away from the clamping table, the driven shaft rotates to be inserted into the driven hole, a hydraulic cylinder is fixedly arranged on the outer side of the driving plate, the hydraulic cylinder rotates to be connected with a connecting rod, and one end, far away from the hydraulic cylinder, of the connecting rod is rotatably connected with the rotary table.

Through adopting above-mentioned technical scheme, the operator punches a hole to the knife rest blank on fixing the knife rest blank to the clamping table, after the horizontal plane processing of the knife rest blank that the level was placed is accomplished, because the clamping table rotates and connects between driving plate and driven plate, so can rotate the vertical face of clamping table to the knife rest blank and process, the operator starts the pneumatic cylinder this moment, the up-and-down motion through the pneumatic cylinder output shaft drives the connecting rod motion, and then drives the carousel and rotate, from the area messenger driving shaft rotation, finally make the clamping table rotate. The conversion between the horizontal plane and the vertical plane of the tool rest blank fixed on the fixed table is realized, the fixed position of the tool rest blank is not required to be dismounted, mounted and replaced, and the tool rest blank fixing device is convenient and labor-saving.

The present invention may be further configured in a preferred embodiment as: a limiting groove is formed in the driving hole, the longitudinal section of the limiting groove is in a fan shape with a central angle of 90 degrees, an elastic strip-shaped limiting block is fixedly arranged at one end of the driving shaft, which is connected with the driving hole in a rotating mode, and the limiting block is connected in the limiting groove in a sliding mode.

Through adopting above-mentioned technical scheme, the bar stopper is arranged in the spacing groove, and the stopper can prevent that the driving shaft from doing the circumferential rotation in the initiative hole, and the spacing groove plays spacing effect with the stopper, prevents that the driving shaft from at the pivoted in-process, because excessively rotates, leads to the knife rest blank processing position inaccurate.

The present invention may be further configured in a preferred embodiment as: the spring groove has been seted up to the driving shaft, stopper sliding connection is in the spring groove, the one end that the stopper was kept away from in the spring groove is fixed with reset spring, when reset spring is in natural state, the stopper stretches out the spring groove and extends to the spacing inslot.

Through adopting above-mentioned technical scheme, the operator presses the stopper and then compression reset spring in the installation, makes the stopper be located the spring inslot, conveniently inserts the driving shaft and establishes into the initiative hole, inserts when the driving shaft and establishes into the initiative hole, and the stopper extends to the spacing groove under reset spring's the effect of resilience force, carries on spacingly to the driving shaft.

The present invention may be further configured in a preferred embodiment as: the fixed base upper surface is seted up "well" font slide, two lower extremes of initiative board and dead lever respectively are equipped with two sliders, two liang of sliders are parallel to each other, slider sliding connection is in the slide.

Through adopting above-mentioned technical scheme, the operator adds man-hour to the tool rest blank, because slider sliding connection is in the slide, promotes the initiative board or the driven plate this moment, makes the slider slide in the spout, can make the tool rest blank remove along X axle direction or along Y axle direction, increases the adaptation scope of tool rest blank processing.

The present invention may be further configured in a preferred embodiment as: the driving shaft is rotatably inserted in the driving bearing, and the driven shaft is rotatably inserted in the driven bearing.

Through adopting above-mentioned technical scheme, through the setting at driving bearing and driven bearing, can improve driving shaft and driven shaft respectively in initiative hole and driven hole pivoted smoothness nature, subtract down because of the loss that the friction produced.

The present invention may be further configured in a preferred embodiment as: the side edge of the clamping table is fixedly provided with a clamping oil cylinder, an output shaft of the clamping oil cylinder is fixedly provided with a pressing sheet, and the upper surface of the clamping table is provided with a clamping groove matched with the pressing sheet.

Through adopting above-mentioned technical scheme, the operator places the knife rest blank in pressing from both sides the groove, and the tight hydro-cylinder pulling preforming whereabouts of operation clamp will be located the knife rest blank clamp tightly in pressing from both sides the groove, labour saving and time saving.

The present invention may be further configured in a preferred embodiment as: the drilling arm is "L" font, including the xarm of level setting and the perpendicular arm of vertical setting, xarm and perpendicular arm fixed connection, it is connected with the drill bit to erect the arm bottom rotation, unable adjustment base includes the curb plate of a vertical setting, a cylinder chamber has been seted up to the curb plate, one side that the curb plate is close to the clamping table is vertical has seted up a perpendicular groove, the xarm is close to the one end of curb plate and has set firmly perpendicular piece, perpendicular piece sliding connection is in erecting the inslot and extending to the cylinder intracavity, the cylinder intracavity is vertical to set firmly a cylinder, the output shaft and the perpendicular piece fixed connection of cylinder.

Through adopting above-mentioned technical scheme, after the fixed completion of knife rest blank, the cylinder starts, and the output shaft and the riser fixed connection of cylinder drive the xarm and reciprocate at the curb plate of fixing base to make the drill bit conveniently be close to the knife rest blank, conveniently process the knife rest blank.

The present invention may be further configured in a preferred embodiment as: the vertical directional clamping platform of tip of erecting the arm, erect the arm and vertically set up a drilling that runs through erecting the arm, erect the arm top and be fixed with the rotation motor, the output shaft that rotates the motor has set firmly the drilling rod, the drilling rod rotates and passes drilling, the drilling rod is kept away from the one end and the drill bit fixed connection who rotate the motor.

Through adopting above-mentioned technical scheme, when the drill bit is close to the knife rest blank, rotate the motor and start, rotate the output shaft of motor and drive the drilling rod and rotate, because the end fixing of drilling rod has the drill bit, so the drill bit is along with boring the same direction with fast rotation, can effectively punch a hole to the knife rest blank.

To sum up, the utility model discloses a following at least one useful technological effect:

1. through the arrangement that the clamping table is rotationally connected with the driving plate and the driven plate, two intersected surfaces of the tool rest blank can be machined under the condition that the tool rest blank does not need to be manually changed, and the operation is convenient;

2. through the setting of spacing groove and stopper, can carry on spacingly to the rotation that presss from both sides tight platform, can prevent to press from both sides tight platform and rotate the too big and can not carry out accurate location processing to the knife rest blank of range.

Drawings

FIG. 1 is a schematic view of a prior art tool holder;

FIG. 2 is a schematic structural view of the embodiment;

FIG. 3 is an exploded view of the drilling arm and side plate of the embodiment;

FIG. 4 is a schematic view showing the attachment of the tool holder to the clamping table in the embodiment;

FIG. 5 is an exploded view of the securing mechanism of the embodiment;

FIG. 6 is an enlarged schematic view of portion A of FIG. 5;

fig. 7 is a schematic sectional view of an active plate in the embodiment.

In the figure, 1, a drill arm; 11. a vertical arm; 12. a cross arm; 121. a vertical block; 2. a fixing mechanism; 21. a fixed base; 211. a slideway; 212. a side plate; 2121. a cylinder cavity; 2122. a vertical slot; 22. a driving plate; 221. an active aperture; 2211. a limiting groove; 2212. a drive bearing; 223. a turntable; 23. a driven plate; 231. a driven hole; 2311. a driven bearing; 3. a clamping table; 31. a drive shaft; 311. a limiting block; 312. a spring slot; 313. a return spring; 32. a driven shaft; 33. clamping the oil cylinder; 331. tabletting; 34. a clamping groove; 341. a buffer hole; 4. a hydraulic cylinder; 41. a connecting rod; 5. a drill bit; 6. a cylinder; 7. a motor; 71. a drill stem; 8. a tool holder; 81. a horizontal plane; 82. a vertical plane.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

refer to fig. 2, do the utility model discloses a drilling machine for processing optic fibre cutting knife rest, including drilling arm 1 and fixed establishment 2, with 2 sliding connection of fixed establishment. Drilling arm 1 is "L" font, and the tip of drilling arm 1 rotates and is connected with drill bit 5, and fixed establishment 2 includes unable adjustment base 21, and driving plate 22 and driven plate 23, is connected with between driving plate 22 and the driven plate 23 and presss from both sides tight platform 3, and drilling arm 1 is located the top that presss from both sides tight platform 3. In the using process, the tool rest blank is fixed on the clamping table 3, and the drilling arm 1 is moved to drill the tool rest blank on the clamping table 3.

Referring to fig. 3, the drilling arm 1 includes a horizontal cross arm 12 and a vertical arm 11, the end of the cross arm 12 is fixedly connected with the end of the vertical arm 11, the fixing base 21 includes a vertical side plate 212, a vertical slot 2122 is vertically formed on the side of the side plate 212 close to the clamping table 3, a vertical block 121 is fixed at one end of the cross arm 12 close to the side plate 212, and the vertical block 121 is slidably connected in the vertical slot 2122. The side plate 212 is provided with a cylinder cavity 2121, a cylinder 6 is fixedly arranged in the cylinder cavity 2121, and an output shaft of the cylinder 6 is fixedly connected with one end, close to the side plate 212, of the cross arm 12. The end that erects arm 11 and is close to the tight arm of clamp rotates and is connected with drill bit 5, and when processing the knife rest blank, cylinder 6 starts to drive drilling arm 1 and removes to the direction that is close to the knife rest blank, makes drill bit 5 can contact with the knife rest blank.

Referring to fig. 2 and 3, the end of the vertical arm 11 points to the clamping table 3, a drill hole is formed in the bottom end of the vertical arm 11, a drill rod 71 is rotatably connected to the drill hole, a drill hole penetrating through the vertical arm 11 is vertically formed in the vertical arm 11, a rotating motor 7 is fixedly arranged at the top end of the vertical arm 11, one end of the drill rod 71 is rotatably connected to an output shaft of the rotating motor 7, and the other end of the drill rod 71 is fixedly connected with the drill bit 5. When the drill bit 5 is close to the tool rest blank, the motor 7 is powered on to rotate, the output shaft of the motor 7 drives the drill rod 71 to rotate, and then the drill bit 5 is driven to rotate to punch a hole in the tool rest blank.

Referring to fig. 4, a clamping mechanism for clamping the tool holder 8 is arranged on the clamping table 3, the clamping mechanism includes a clamping cylinder 33 fixedly arranged on the side of the clamping table 3, a pressing sheet 331 is fixed on an output shaft of the clamping cylinder 33, a clamping groove 34 matched with the pressing sheet 331 is formed in the clamping table 3, and the pressing sheet 331 abuts against the clamping groove 34. When an operator operates, the tool rest blank is placed into the clamping groove 34, the horizontal surface 81 is located in the clamping groove 34 at the moment, the edge of the horizontal surface 81 is abutted to the inner wall of the clamping groove 34, the clamping oil cylinder 33 is started, and the pressing sheet 34 is pressed on the position, close to the edge, of the horizontal surface 81, so that the tool rest blank is clamped, and the tool rest blank is firmer during machining. Meanwhile, a buffer hole 341 is formed in the position, corresponding to the hole of the horizontal plane 81, of the lower surface of the clamping groove 34, so that impact on the clamping table 3 in the drilling process is prevented. After horizontal plane 81 processes simultaneously, when rotating clamping table 3 and drilling vertical face 82, because the edge of horizontal plane and the inner wall butt of pressing from both sides groove 34, can prevent to drilling vertical face 82, the knife rest blank takes place to shift, makes the connection more firm.

Referring to fig. 5, the driving plate 22 is formed with a driving hole 221, the driven plate 23 is formed with a driven hole 231, a driving bearing 2212 is fixedly installed in the driving hole 221, and a driven bearing 2311 is fixedly installed in the driven hole 231. The two ends of the clamping table 3 are fixedly provided with a driving shaft 31 and a driven shaft 32, one ends of the driving shaft 31 and the driven shaft 32, which are connected with the clamping table 3, are respectively fixed with a disc, through holes are formed in the discs, threaded holes are formed in the side wall of the clamping table 3, and the discs are fixedly connected with the clamping table 3 through bolts. The driven shaft 32 is rotatably inserted in the driven bearing 2311, and the driving shaft 31 is rotatably inserted in the driving bearing 2212. After an operator places the tool rest blank on the clamping table 3, when a vertical surface needs to be machined after the machining of a horizontal plane of the tool rest blank is completed, the clamping table 3 can rotate between the driving plate 22 and the driven plate 23, so that the angle of the tool rest blank placed on the clamping table 3 can be adjusted, the tool rest blank does not need to be taken down again for installation, and the tool rest blank is convenient and labor-saving.

Referring to fig. 5, a hydraulic cylinder 4 is fixed on the side wall of the driving plate 22, a connecting rod 41 is connected to an output shaft of the hydraulic cylinder 4, a turntable 223 is fixed at one end of the driving shaft 31 far away from the clamping table 3, a rotating block is fixed on the surface of the turntable 223 close to the edge, a rotating hole is formed in one end of the connecting rod 41 far away from the hydraulic cylinder 4, and the rotating block is rotatably inserted into the rotating hole. The hydraulic cylinder 4 moves up and down, the connecting rod 41 is pulled to move, the turntable 223 is further driven to rotate, so that the driving shaft 31 rotates, and finally the clamping table 3 can rotate between the driving plate 22 and the driven plate 23, so that the clamping table is convenient and labor-saving.

Referring to fig. 6 and 7, a limiting groove 2211 is formed in the driving hole 221, a longitudinal section of the limiting groove 2211 is a sector with a central angle of 90 degrees, the limiting groove 2211 is formed from the opening direction of the driving hole 221 and extends towards the bottom end of the driving hole 221, a strip-shaped limiting block 311 is fixed at one end of the driving shaft 31 rotatably connected with the driving hole 221, the limiting block 311 is arranged along the axial direction of the driving shaft 31, the length of the limiting block 311 is equal to that of the limiting groove 2211, and the limiting block 311 is slidably connected with the limiting groove 2211. When the clamping device is in a natural state, the limiting block 311 is in a horizontal position and abuts against the horizontal right-angle side of the limiting groove 2211, the clamping device is rotated, the limiting block 311 is in a vertical state, and the limiting block 311 abuts against the vertical right-angle side of the limiting groove 2211 to prevent the clamping device from excessively rotating.

Referring to fig. 5 and 6, a spring groove 312 is formed at one end of the driving shaft 31 inserted into the driving hole 221, the stopper 311 is slidably connected in the spring groove 312, and a return spring 313 is fixed at one end of the spring groove 312 away from the stopper 311. When the driving shaft 31 is inserted into the driving hole 221, the limit block 311 is pressed to compress the return spring 313, so that the driving shaft 31 can be conveniently inserted into the driving hole 221, and when the limit block 311 moves to coincide with the limit groove 2211, the limit block 311 is popped out to extend into the limit groove 2211 under the action of resilience force of the return spring 313, so that the driving shaft 31 is more conveniently connected with the driving hole 221 in a labor-saving manner.

Referring to fig. 5, a 'cross' -shaped slide way 211 is formed on the surface of the fixed base 21 and includes two parallel transverse slide ways 211 and two parallel longitudinal slide ways 211, two sliders are fixed at the bottom ends of the driving plate 22 and the driven plate 23 respectively, the sliders are parallel to each other, the width between the two sliders at the bottom end of the driving plate 22 and the width between the two sliders at the bottom end of the driven plate 23 are the same as the width between the two transverse slide ways 211 and the width between the two longitudinal slide ways 211, and the sliders are placed in sliding and are connected with the slide ways 211 in a sliding manner. The driving plate 22 and the driven plate 23 can move along the X-axis direction and the Y-axis direction on the fixed base 21, so that the clamping table 3 can move along the X-axis direction and the Y-axis direction on the fixed base 21, and the application range of the cost processing is enlarged.

The implementation principle of the embodiment is as follows: placing a tool rest blank on a clamping table 3, clamping the tool rest blank through a clamping oil cylinder 33, moving the fixed base 21 to slide, adjusting the clamping table 3 to a proper position, starting a motor 7 to drive a drill bit 5 to rotate, and pulling a drilling arm 1 to move downwards through an air cylinder 6 to enable the drill bit 5 to be close to the tool rest blank so as to punch a hole on the tool rest blank; when the vertical surface of the tool rest blank is machined, the drilling arm 1 is lifted, the clamping table 3 is pulled by the hydraulic cylinder 4 to rotate, the machining surface of the tool rest blank is rotated, the wall of a drilling hole is close to the tool rest blank again, and then the tool rest blank is continuously punched.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. The utility model provides a drilling machine for processing optic fibre cutting knife rest, includes drilling arm (1) and fixed establishment (2), its characterized in that: the drilling arm (1) is vertically connected with the fixing mechanism (2) in a sliding mode, the fixing mechanism (2) comprises a fixing base (21), a driving plate (22) and a driven plate (23), the driving plate (22) and the driven plate (23) are just opposite to each other and are connected to the upper surface of the fixing base (21) in a sliding mode, a clamping table (3) is connected between the driving plate (22) and the driven plate (23) in a rotating mode, a clamping mechanism used for clamping a tool rest (8) is arranged on the clamping table (3), a driving hole (221) is formed in the driving plate (22), a driven hole (231) is formed in the driven plate (23), a driving shaft (31) and a driven shaft (32) are arranged at two ends of the clamping table (3) respectively, the driving shaft (31) is rotatably inserted into the driving hole (221) to extend out the driving plate (22), and a turntable (223) is fixedly arranged at the end, far away, the driven shaft (32) rotates and is inserted in the driven hole (231), a hydraulic cylinder (4) is fixedly arranged on the outer side of the driving plate (22), the hydraulic cylinder (4) is rotatably connected with a connecting rod (41), one end, far away from the hydraulic cylinder (4), of the connecting rod (41) is rotatably connected with the turntable (223), and the drilling arm (1) is located above the clamping table (3).

2. A drill press for machining a fiber cutter head according to claim 1, wherein: a limiting groove (2211) is formed in the driving hole (221), the limiting groove (2211) is in a sector shape with a central angle of 90 degrees, an elastic strip-shaped limiting block (311) is fixedly arranged at one end of the driving shaft (31), and the limiting block (311) is connected in the limiting groove (2211) in a sliding mode.

3. A drill press for machining a fiber cutter head according to claim 2, wherein: spring groove (312) have been seted up in driving shaft (31), stopper (311) sliding connection is in spring groove (312), the one end that stopper (311) were kept away from in spring groove (312) is fixed with reset spring (313), when reset spring (313) are in natural state, stopper (311) stretch out spring groove (312) and extend to in stopper groove (2211).

4. A drill press for machining a fiber cutter head according to claim 1, wherein: 'well' font slide (211) have been seted up to unable adjustment base (21) upper surface, drive plate (22) and driven plate (23) lower extreme respectively are equipped with two sliders, two liang of sliders are parallel to each other, slider sliding connection is in slide (211).

5. A drill press for machining a fiber cutter head according to claim 1, wherein: the driving hole (221) is fixedly provided with a driving bearing (2212), the driven hole (231) is fixedly provided with a driven bearing (2311), the driving shaft (31) is rotatably inserted into the driving bearing (2212), and the driven shaft (32) is rotatably inserted into the driven bearing (2311).

6. A drill press for machining a fiber cutter head according to claim 1, wherein: the clamping mechanism comprises a clamping oil cylinder (33) fixedly arranged on the side edge of the clamping table (3), a pressing sheet (331) is fixedly arranged on an output shaft of the clamping oil cylinder (33), and a clamping groove (34) matched with the pressing sheet (331) is formed in the upper surface of the clamping table (3).

7. A drill press for machining a fiber cutter head according to claim 1, wherein: the drilling arm (1) is L-shaped and comprises a horizontal arm (12) and a vertical arm (11), the horizontal arm (12) is horizontally arranged, the vertical arm (11) is vertically arranged, the bottom end of the vertical arm (11) is rotatably connected with a drill bit (5), the fixed base (21) comprises a vertically arranged side plate (212), a cylinder cavity (2121) is formed in the side plate (212), a vertical groove (2122) is vertically formed in one side, close to the clamping table (3), of the side plate (212), a vertical block (121) is fixedly arranged at one end, close to the side plate (212), of the horizontal arm (12), the vertical block (121) is slidably connected into the vertical groove (2122) and extends into the cylinder cavity (2121), a cylinder (6) is vertically fixedly arranged in the cylinder cavity (2121), and an output shaft of the cylinder (6) is fixedly connected with the vertical block (121).

8. A drill press for machining a fiber cutter head according to claim 7, wherein: the vertical directional clamping table (3) of tip of erecting arm (11), erect arm (11) and vertically set up a drilling that runs through erecting arm (11), erect arm (11) top and be fixed with rotation motor (7), the output shaft that rotates motor (7) has set firmly drilling rod (71), drilling rod (71) rotate and pass drilling, the one end and drill bit (5) fixed connection of rotating motor (7) are kept away from in drilling rod (71).

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