Food mixer shell turning device

Abstract

The present invention discloses a food mixer shell turning device, which belongs to the field of turning processing technology and includes a base mechanism for continuously feeding the food mixer shell, a supporting mechanism for supporting the food mixer provided on the base mechanism, and a processing mechanism for turning the food mixer shell provided on the supporting mechanism. The base mechanism provided in the present invention can continuously push the food mixer shell to be processed above the electromagnetic base to achieve continuous loading, and after the food mixer shell is processed, it is blocked by the discharging rod to automatically discharge the material, thereby achieving fully automatic loading and unloading, a high degree of automation, and good continuity; the processing mechanism provided in the present invention realizes full-coverage turning processing of the food mixer shell by sliding the arc block along the fixed arc block and the movable frame along the movable arc plate, in conjunction with the extension and contraction of the internal thread block along the movable end block.

Description

Technical Field

[0001] The present invention relates to the technical field of turning processing, in particular to a turning device for a food mixer shell. Background Art

[0002] Food mixer casing turning refers to the turning process used to produce or process food mixer casings. Turning is a common metalworking technique widely used for precision machining of parts. When producing food mixer casings, turning equipment ensures that the size, shape, and surface finish of the casing meet design requirements. Food mixer casings are typically made of stainless steel or food-grade plastic. Stainless steel's high strength and corrosion resistance make it suitable for turning. Existing food mixer casing turning equipment typically uses a lathe, which cannot achieve continuous automatic operation and has a low degree of automation. Summary of the Invention

[0003] In response to the above technical problems, the present invention adopts the following technical solution: a food mixer shell turning device, comprising a base mechanism for continuously feeding the food mixer shell, the base mechanism comprising a bottom plate, the base mechanism being provided with a support mechanism for supporting the food mixer, the support mechanism comprising a bottom sleeve fixedly mounted below the bottom plate, the support mechanism being provided with a processing mechanism for turning the food mixer shell, the processing mechanism comprising an arc moving block.

[0004] Furthermore, the base mechanism includes a slope block fixedly mounted on the bottom plate, a ramp is provided on the bottom plate, an inclined ramp is provided on the slope block, the inclined ramps are connected to the ramps, and an inner arc surface is provided on the ramp.

[0005] Furthermore, a pushing guide rail is fixedly installed on the base plate, a pushing motor is fixedly installed on the base plate, a pushing screw is fixedly installed on the motor shaft of the pushing motor, a pushing frame is slidably installed on the pushing guide rail, the pushing frame and the pushing screw form a threaded transmission, and a push plate is fixedly installed on the pushing frame, and the push plate slides in the ramp.

[0006] Furthermore, two front positioning rods are rotatably mounted on the bottom plate, and side positioning rods are fixedly mounted on the front positioning rods.

[0007] The food mixer shell to be turned is put into the ramp and finally slides into the inner arc surface of the ramp. Multiple food mixers are stacked on the ramp and the ramp. The ejection motor drives the ejection screw to rotate, thereby driving the ejection rack and the push plate to slide along the ejection guide rail and the ramp, and the food mixer shell on the inner arc surface is pushed onto the electromagnetic seat by the push plate. The push plate will only push one food mixer shell each time. When the push plate is retracted to the initial position, the next food mixer shell is pushed to the inner arc surface under the action of the gravity of the food mixer shell on the ramp. When the food mixer shell is pushed onto the electromagnetic seat, the diameter of the food mixer shell is larger than the diameter of the electromagnetic seat, and the food mixer shell is positioned by the side positioning rod and the front positioning rod.

[0008] Furthermore, the support mechanism includes a placement cylinder fixedly mounted on the base plate, a fixed arc block fixedly mounted on the placement cylinder, an arc gear ring fixedly mounted on the fixed arc block, and an arc moving block slidably mounted on the fixed arc block.

[0009] Furthermore, a bottom electric cylinder is fixedly installed in the bottom sleeve, a rotating motor is fixedly installed on the output end of the bottom electric cylinder, an electromagnetic seat is fixedly installed on the motor shaft of the rotating motor, and the diameter of the electromagnetic seat is smaller than the diameter of the food mixer shell.

[0010] Furthermore, a winding rod is fixedly installed on the placement cylinder, two discharging rods are rotatably installed on the winding rod, and two limit blocks are fixedly installed on the placement cylinder.

[0011] When the food mixer shell is positioned, the electromagnetic base is energized to adsorb the food mixer shell, and then the bottom electric cylinder rises, driving the food mixer to rise. When the food mixer shell rises, since the diameter of the food mixer shell is larger than the diameter of the electromagnetic base, the food mixer shell will contact the discharge rod, thereby driving the discharge rod to rise, and the electromagnetic base will not contact the discharge rod. When the food mixer shell passes the discharge rod, the discharge rod falls back to the limit block under the action of gravity.

[0012] Furthermore, the processing mechanism includes a movable arc plate fixedly mounted on the arc moving block, an intermediate gear and two arc moving wheels are rotatably mounted on the arc moving block, the intermediate gear is engaged with the arc gear ring, the arc moving wheels roll along the inner side of the fixed arc block, a movable motor is fixedly mounted on the arc moving block, a motor gear is fixedly mounted on the motor shaft of the movable motor, and the motor gear is engaged with the intermediate gear.

[0013] Furthermore, a lower arc inner gear ring is fixedly installed under the movable arc plate, an arc groove is provided on the movable arc plate, a movable frame is slidably installed on the movable arc plate, an end gear and two movable rollers are rotatably installed on the movable frame, the movable rollers roll in the arc groove, the end gear is engaged with the lower arc inner gear ring, an end motor is fixedly installed on the movable frame, and the motor shaft of the end motor is fixedly installed with the end gear.

[0014] Furthermore, a movable end block is fixedly installed on the movable frame, an inner motor is fixedly installed in the movable end block, an inner screw is fixedly installed on the motor shaft of the inner motor, an inner thread block is slidably installed in the movable end block, the inner thread block and the inner screw form a threaded transmission, a turning motor is fixedly installed on the inner thread block, and a turning tool is fixedly installed on the motor shaft of the turning motor.

[0015] Through the intermediate gear and two arc-moving wheels, the axis of the arc-moving block is always directed toward the center of the fixed arc block. Through the end gear and two movable rollers, the axis of the movable frame is always directed toward the center of the movable arc plate. When the electromagnetic seat brings the food mixer shell to the bottom of the fixed arc block, the rotating motor can drive the electromagnetic seat to rotate, and the movable motor drives the motor gear to rotate. Through the rotation of the intermediate gear, the arc-moving block can slide in an arc around the fixed arc block under the action of the arc-moving wheel. The end motor drives the end gear to rotate. Under the action of the movable roller, the movable frame slides in an arc around the movable arc plate, thereby adjusting different processing positions. At the same time, the rotation of the inner motor drives the inner screw to rotate, thereby driving the inner thread block to slide along the inside and outside of the movable end block. The turning tool is driven by the turning motor to rotate to turn the food mixer shell.

[0016] After the processing is completed, the bottom electric cylinder contracts, driving the electromagnetic seat and the food mixer shell to descend, and the electromagnetic seat loses power. When the food mixer shell contacts the discharge rod, the electromagnetic seat continues to descend. However, the food mixer shell will be blocked by the discharge rod because its diameter is larger than the electromagnetic seat. The discharge rod cannot rotate downward due to the existence of the limit block. The food mixer shell is left on the discharge rod and eventually slides out along the discharge rod.

[0017] Compared with the prior art, the present invention has the following advantages: (1) the base mechanism provided in the present invention can continuously push the food mixer shell to be processed to the top of the electromagnetic seat, thereby realizing continuous loading, and after the food mixer shell is processed, it is blocked by the discharging rod to automatically discharge the material, thereby realizing fully automatic loading and unloading, high degree of automation and good continuity; (2) the electromagnetic seat of the supporting mechanism provided in the present invention can adsorb the food mixer shell to be processed, and can drive the food mixer shell to rotate, and cooperate with the processing mechanism for processing; (3) the processing mechanism provided in the present invention realizes full-coverage turning processing of the food mixer shell by sliding the arc block along the fixed arc block and the movable frame along the movable arc plate, and cooperating with the extension and contraction of the internal thread block along the movable end block. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the base mechanism structure of the present invention.

[0020] Figure 3 Schematic diagram of the support structure of the present invention Figure 1 .

[0021] Figure 4 Schematic diagram of the support structure of the present invention Figure 2 .

[0022] Figure 5 Schematic diagram of the support structure of the present invention Figure 1 .

[0023] Figure 6 Schematic diagram of the support structure of the present invention Figure 2 .

[0024] Figure 7 Schematic diagram of the support structure of the present invention Figure 3 .

[0025] Figure 8 Schematic diagram of the support structure of the present invention Figure 4 .

[0026] Reference numerals: 101-bottom plate; 102-slope block; 103-inclined ramp; 104-ramp; 105-inner arc surface; 106-ejection motor; 107-ejection screw rod; 108-ejection guide rail; 109-ejection rack; 110-front positioning rod; 111-side positioning rod; 112-ejection plate; 201-bottom sleeve; 202-placing cylinder; 203-arc gear ring; 204-rotating motor; 205-electromagnetic seat; 206-winding rod; 207-discharging rod; 208-limiting block; 209 -Fixed arc block; 210-bottom electric cylinder; 301-arc moving block; 302-movable motor; 303-motor gear; 304-intermediate gear; 305-movable arc plate; 306-arc groove; 307-movable frame; 308-arc moving wheel; 309-movable roller; 310-end motor; 311-end gear; 312-movable end block; 313-lower arc inner gear ring; 314-inner motor; 315-inner screw rod; 316-inner thread block; 317-turning motor; 318-turning tool. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] Example: Reference Figures 1-8 A food mixer shell turning device includes a base mechanism for continuously feeding the food mixer shell, the base mechanism includes a bottom plate 101, and a supporting mechanism for supporting the food mixer is provided on the base mechanism. The supporting mechanism includes a bottom sleeve 201, and the bottom sleeve 201 is fixedly installed under the bottom plate 101. The supporting mechanism is provided with a processing mechanism for turning the food mixer shell, and the processing mechanism includes an arc moving block 301.

[0029] like Figure 2 As shown, the base mechanism includes a slope block 102 fixedly mounted on a base plate 101 , a ramp 104 is provided on the base plate 101 , an inclined ramp 103 is provided on the slope block 102 , the inclined ramp 103 is connected to the ramp 104 , and an inner arc surface 105 is provided on the ramp 104 .

[0030] like Figure 2 As shown, an ejection guide rail 108 is fixedly mounted on the base plate 101, an ejection motor 106 is fixedly mounted on the base plate 101, an ejection screw 107 is fixedly mounted on the motor shaft of the ejection motor 106, an ejection rack 109 is slidably mounted on the ejection guide rail 108, the ejection rack 109 and the ejection screw 107 form a threaded transmission, and a push plate 112 is fixedly mounted on the ejection rack 109, and the push plate 112 slides in the ramp 104.

[0031] like Figure 2 As shown, two front positioning rods 110 are rotatably mounted on the bottom plate 101 , and side positioning rods 111 are fixedly mounted on the front positioning rods 110 .

[0032] The food mixer shell to be turned is placed into the ramp 103 and eventually slides into the inner arc surface 105 of the ramp 104. Multiple food mixers are stacked on the ramp 104 and the ramp 103. The ejection motor 106 drives the ejection screw 107 to rotate, thereby driving the ejection frame 109 and the push plate 112 to slide along the ejection guide rail 108 and the ramp 104. The push plate 112 pushes the food mixer shell on the inner arc surface 105 onto the electromagnetic base 205. The push plate 112 only pushes one food mixer shell at a time. When the push plate 112 is retracted to the initial position, the next food mixer shell is pushed to the inner arc surface 105 under the action of the gravity of the food mixer shell on the ramp 103. When the food mixer shell is pushed onto the electromagnetic base 205, the diameter of the food mixer shell is larger than the diameter of the electromagnetic base 205. The food mixer shell is positioned by the side positioning rod 111 and the front positioning rod 110.

[0033] like Figure 3 、 Figure 4 As shown, the support mechanism includes a placement cylinder 202 fixedly mounted on the base plate 101, a fixed arc block 209 fixedly mounted on the placement cylinder 202, an arc gear ring 203 fixedly mounted on the fixed arc block 209, and an arc moving block 301 slidably mounted on the fixed arc block 209.

[0034] like Figure 3 、 Figure 4 As shown, a bottom electric cylinder 210 is fixedly installed in the bottom sleeve 201, a rotating motor 204 is fixedly installed on the output end of the bottom electric cylinder 210, and an electromagnetic base 205 is fixedly installed on the motor shaft of the rotating motor 204. The diameter of the electromagnetic base 205 is smaller than the diameter of the food mixer shell.

[0035] like Figure 3 、 Figure 4 As shown, a winding rod 206 is fixedly installed on the placement cylinder 202, two discharge rods 207 are rotatably installed on the winding rod 206, and two limit blocks 208 are fixedly installed on the placement cylinder 202.

[0036] When the food mixer shell is positioned, the electromagnetic base 205 is energized to absorb the food mixer shell, and then the bottom electric cylinder 210 rises, driving the food mixer to rise. When the food mixer shell rises, since the diameter of the food mixer shell is larger than the diameter of the electromagnetic base 205, the food mixer shell will contact the discharge rod 207, thereby driving the discharge rod 207 to rise, while the electromagnetic base 205 will not contact the discharge rod 207. When the food mixer shell passes the discharge rod 207, the discharge rod 207 falls back onto the limit block 208 under the action of gravity.

[0037] like Figure 5-Figure 8 As shown, the processing mechanism includes a movable arc plate 305 fixedly mounted on the arc moving block 301, an intermediate gear 304 and two arc moving wheels 308 are rotatably mounted on the arc moving block 301, the intermediate gear 304 is engaged with the arc gear ring 203, and the arc moving wheels 308 roll along the inner side of the fixed arc block 209, a movable motor 302 is fixedly mounted on the arc moving block 301, a motor gear 303 is fixedly mounted on the motor shaft of the movable motor 302, and the motor gear 303 is engaged with the intermediate gear 304.

[0038] like Figure 5-Figure 8 As shown, a lower arc inner gear ring 313 is fixedly installed below the movable arc plate 305, an arc groove 306 is provided on the movable arc plate 305, a movable frame 307 is slidably installed on the movable arc plate 305, and an end gear 311 and two movable rollers 309 are rotatably installed on the movable frame 307. The movable rollers 309 roll in the arc groove 306, and the end gear 311 is engaged with the lower arc inner gear ring 313. A terminal motor 310 is fixedly installed on the movable frame 307, and the motor shaft of the terminal motor 310 is fixedly installed with the terminal gear 311.

[0039] like Figure 5-Figure 8 As shown, a movable end block 312 is fixedly mounted on the movable frame 307, an inner motor 314 is fixedly mounted inside the movable end block 312, an inner screw rod 315 is fixedly mounted on the motor shaft of the inner motor 314, an inner thread block 316 is slidably mounted inside the movable end block 312, the inner thread block 316 and the inner screw rod 315 form a threaded transmission, a turning motor 317 is fixedly mounted on the inner thread block 316, and a turning tool 318 is fixedly mounted on the motor shaft of the turning motor 317.

[0040] The axis of the arc moving block 301 is always oriented toward the center of the fixed arc block 209 through the intermediate gear 304 and the two arc moving wheels 308. The axis of the movable frame 307 is always oriented toward the center of the movable arc plate 305 through the end gear 311 and the two movable rollers 309. When the electromagnetic base 205 with the food mixer shell reaches the bottom of the fixed arc block 209, the rotating motor 204 can drive the electromagnetic base 205 to rotate, and the movable motor 302 drives the motor gear 303 to rotate. The intermediate gear 304 rotates, which can be used to rotate the arc moving block 301. Under the action of the wheel 308, the arc moving block 301 slides in an arc around the fixed arc block 209, and the end motor 310 drives the end gear 311 to rotate. Under the action of the movable roller 309, the movable frame 307 slides in an arc around the movable arc plate 305, thereby adjusting different processing positions. At the same time, the internal motor 314 rotates to drive the internal screw rod 315 to rotate, thereby driving the internal thread block 316 to slide in and out along the movable end block 312, and the turning motor 317 drives the turning tool 318 to rotate to turn the food mixer shell.

[0041] After the processing is completed, the bottom electric cylinder 210 contracts, driving the electromagnetic base 205 and the food mixer housing to descend, and the electromagnetic base 205 loses power. When the food mixer housing contacts the discharge rod 207, the electromagnetic base 205 continues to descend. However, the food mixer housing is blocked by the discharge rod 207 because its diameter is larger than that of the electromagnetic base 205. The discharge rod 207 cannot rotate downward due to the existence of the limit block 208. The food mixer housing is left on the discharge rod 207 and eventually slides out along the discharge rod 207.

[0042] The working principle of the food mixer shell turning device disclosed in the present invention is as follows: the food mixer shell to be turned is placed from the ramp 103 and finally slides into the inner arc surface 105 of the ramp 104. Multiple food mixers are stacked on the ramp 104 and the ramp 103. The ejection motor 106 drives the ejection screw 107 to rotate, thereby driving the ejection frame 109 and the push plate 112 to slide along the ejection guide rail 108 and the ramp 104. The food mixer shell on the inner arc surface 105 is pushed by the push plate 112. The mixer housing is pushed onto the electromagnetic base 205. The push plate 112 only pushes one mixer housing at a time. When the push plate 112 is retracted to its initial position, the next mixer housing is pushed onto the inner arc surface 105 under the action of the gravity of the mixer housing on the ramp 103. When the mixer housing is pushed onto the electromagnetic base 205, the diameter of the mixer housing is larger than the diameter of the electromagnetic base 205. The mixer housing is positioned by the side positioning rods 111 and the front positioning rods 110. When the food mixer shell is positioned, the electromagnetic base 205 is energized to absorb the food mixer shell, and then the bottom electric cylinder 210 rises, driving the food mixer to rise. When the food mixer shell rises, since the diameter of the food mixer shell is larger than the diameter of the electromagnetic base 205, the food mixer shell will contact the discharge rod 207, thereby driving the discharge rod 207 to rise, while the electromagnetic base 205 will not contact the discharge rod 207. When the food mixer shell passes the discharge rod 207, the discharge rod 207 falls back onto the limit block 208 under the action of gravity. The axis of the arc moving block 301 is always oriented toward the center of the fixed arc block 209 through the intermediate gear 304 and the two arc moving wheels 308. The axis of the movable frame 307 is always oriented toward the center of the movable arc plate 305 through the end gear 311 and the two movable rollers 309. When the electromagnetic base 205 with the food mixer shell reaches the bottom of the fixed arc block 209, the rotating motor 204 can drive the electromagnetic base 205 to rotate, and the movable motor 302 drives the motor gear 303 to rotate. The intermediate gear 304 rotates, which can be used to rotate the arc moving block 301. Under the action of the wheel 308, the arc moving block 301 slides in an arc around the fixed arc block 209, and the end motor 310 drives the end gear 311 to rotate. Under the action of the movable roller 309, the movable frame 307 slides in an arc around the movable arc plate 305, thereby adjusting different processing positions. At the same time, the internal motor 314 rotates to drive the internal screw rod 315 to rotate, thereby driving the internal thread block 316 to slide in and out along the movable end block 312, and the turning motor 317 drives the turning tool 318 to rotate to turn the food mixer shell.After the processing is completed, the bottom electric cylinder 210 contracts, driving the electromagnetic base 205 and the food mixer housing to descend, and the electromagnetic base 205 loses power. When the food mixer housing contacts the discharge rod 207, the electromagnetic base 205 continues to descend. However, the food mixer housing is blocked by the discharge rod 207 because its diameter is larger than that of the electromagnetic base 205. The discharge rod 207 cannot rotate downward due to the existence of the limit block 208. The food mixer housing is left on the discharge rod 207 and eventually slides out along the discharge rod 207.

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A food mixer housing turning device, comprising a base mechanism for continuously feeding the food mixer housing, characterized in that: The base mechanism comprises a bottom plate (101), a support mechanism for supporting the food mixer is provided on the base mechanism, the support mechanism comprises a bottom sleeve (201), the bottom sleeve (201) is fixedly mounted below the bottom plate (101), a processing mechanism for turning the food mixer housing is provided on the support mechanism, the processing mechanism comprises an arc moving block (301); The support mechanism comprises a placement cylinder (202) fixedly mounted on the bottom plate (101), a fixed arc block (209) fixedly mounted on the placement cylinder (202), an arc gear ring (203) fixedly mounted on the fixed arc block (209), and an arc moving block (301) slidably mounted on the fixed arc block (209); A bottom electric cylinder (210) is fixedly mounted in the bottom sleeve (201), a rotating motor (204) is fixedly mounted on the output end of the bottom electric cylinder (210), an electromagnetic base (205) is fixedly mounted on the motor shaft of the rotating motor (204), and the diameter of the electromagnetic base (205) is smaller than the diameter of the food mixer housing; A winding rod (206) is fixedly mounted on the placement cylinder (202), two discharging rods (207) are rotatably mounted on the winding rod (206), and two limiting blocks (208) are fixedly mounted on the placement cylinder (202); When the food mixer shell is positioned, the electromagnetic base (205) is energized to adsorb the food mixer shell, and then the bottom electric cylinder (210) rises, driving the food mixer to rise. When the food mixer shell rises, since the diameter of the food mixer shell is larger than the diameter of the electromagnetic base (205), the food mixer shell will contact the discharge rod (207), thereby driving the discharge rod (207) to rise, while the electromagnetic base (205) will not contact the discharge rod (207). After the food mixer shell passes the discharge rod (207), the discharge rod (207) falls back onto the limit block (208) under the action of gravity.

2. The food mixer housing turning device according to claim 1, characterized in that: The base mechanism comprises a slope block (102) fixedly mounted on a base plate (101); a ramp (104) is provided on the base plate (101); an inclined ramp (103) is provided on the slope block (102); the inclined ramp (103) is connected to the ramp (104); and an inner arc surface (105) is provided on the ramp (104).

3. The food mixer housing turning device according to claim 2, characterized in that: A push-out guide rail (108) is fixedly mounted on the base plate (101), a push-out motor (106) is fixedly mounted on the base plate (101), a push-out screw rod (107) is fixedly mounted on the motor shaft of the push-out motor (106), a push-out frame (109) is slidably mounted on the push-out guide rail (108), the push-out frame (109) and the push-out screw rod (107) form a threaded transmission, a push plate (112) is fixedly mounted on the push-out frame (109), and the push plate (112) slides in the ramp (104).

4. The food mixer housing turning device according to claim 1, characterized in that: Two front positioning rods (110) are rotatably mounted on the bottom plate (101), and side positioning rods (111) are fixedly mounted on the front positioning rods (110).

5. The food mixer housing turning device according to claim 1, characterized in that: The processing mechanism comprises a movable arc plate (305) fixedly mounted on an arc moving block (301); an intermediate gear (304) and two arc moving wheels (308) are rotatably mounted on the arc moving block (301); the intermediate gear (304) is meshed with an arc gear ring (203); the arc moving wheels (308) roll along the inner side of a fixed arc block (209); a movable motor (302) is fixedly mounted on the arc moving block (301); a motor gear (303) is fixedly mounted on the motor shaft of the movable motor (302); and the motor gear (303) is meshed with the intermediate gear (304).

6. The food mixer housing turning device according to claim 5, characterized in that: A lower arc inner gear ring (313) is fixedly installed below the movable arc plate (305), an arc groove (306) is provided on the movable arc plate (305), a movable frame (307) is slidably installed on the movable arc plate (305), a terminal gear (311) and two movable rollers (309) are rotatably installed on the movable frame (307), the movable rollers (309) roll in the arc groove (306), the terminal gear (311) is meshed with the lower arc inner gear ring (313), a terminal motor (310) is fixedly installed on the movable frame (307), and a motor shaft of the terminal motor (310) is fixedly installed with the terminal gear (311).

7. The food mixer housing turning device according to claim 6, characterized in that: A movable end block (312) is fixedly mounted on the movable frame (307), an inner motor (314) is fixedly mounted in the movable end block (312), an inner screw rod (315) is fixedly mounted on the motor shaft of the inner motor (314), an inner thread block (316) is slidably mounted in the movable end block (312), the inner thread block (316) and the inner screw rod (315) form a threaded transmission, a turning motor (317) is fixedly mounted on the inner thread block (316), and a turning tool (318) is fixedly mounted on the motor shaft of the turning motor (317).

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