A rotary punching mechanism and method for side walls of stainless steel drawn parts

Abstract

Base comprises support, castor, and frame upper is provided with guide rail, and support and conveyer frames movable end contact site are provided with recoil spring, and castor is arranged on the pin of base bottom four, to carry mobile handler location.

Description

Technical Field

[0001] The invention relates to the technical field of stainless steel drawn parts, in particular to a rotary punching mechanism for a side wall of a stainless steel drawn part and a method thereof. Background Art

[0002] Stainless steel products are popular among people for their exquisite appearance, excellent corrosion resistance, high temperature oxidation resistance and high and low temperature strength. They are increasingly used in decoration, light industry, civil hardware, kitchen equipment and utensils and other industries. Due to the high requirements for the appearance quality of such products, deep drawing technology is required in the entire processing process of the products.

[0003] However, the problem of bonding nodules during the deep drawing process of stainless steel plates has always plagued the production site, causing great trouble to producers. Once the bonding nodules are formed, they are difficult to fall off, and the more they stick, the larger they become, resulting in serious scratches on the surface of the stainless steel sheet drawn products. How to avoid the formation of bonding nodules in the drawing die and improve the surface quality of the drawn parts are technical difficulties in the deep drawing of stainless steel thin plates. Summary of the Invention

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotary punching mechanism for the side wall of a stainless steel drawn part, comprising a lifting platform, a back plate at the rear side of the lifting platform, a lifting cylinder on the right side of the back plate, a power output shaft of the lifting cylinder fixedly connected to the back plate, the lifting platform and the back plate being slidably connected, a bottom plate fixedly connected to the top of the lifting platform, support rods fixedly connected to the top of the bottom plate near the four corners, and the top ends of several support rods fixedly connected to a top plate, a drawing cylinder is installed at the center of the top of the top plate, the bottom end of the power output shaft of the drawing cylinder passes through the top plate, a linkage plate is provided at the bottom of the top plate, a motor is installed on the top of the linkage plate, and the power output shaft of the drawing cylinder is fixed to the top of the motor The bottom of the linkage plate is fixedly connected to a lifting rod near the four corners, and the bottom ends of several of the lifting rods are fixedly connected to the top of the bottom plate, the bottom of the linkage plate is fixedly connected to two positioning rods near the left and right sides, and the bottom ends of several of the positioning rods are fixedly connected to the top of the bottom plate, a workbench is provided on the top of the bottom plate, an opening is provided on the workbench, the bottom end of the motor power output shaft is fixedly connected to a screw rod, the bottom end of the screw rod is fixedly connected to a rotating rod, a rotating cylinder is sleeved on the outside of the screw rod, an internal thread is provided near the top end of the inner cavity of the rotating cylinder, the screw rod is engaged with the internal thread of the inner cavity of the rotating cylinder, a protective cover is sleeved on the outside of the rotating rod, and the top of the protective cover is fixed to the bottom end of the rotating cylinder Fixed connection, two rings are provided on the outside of the rotating rod, and the two rings are symmetrically arranged up and down, there are several connecting blocks between the two rings, and several connecting blocks are arranged in a circular array with the center of the ring as the center, the two rings are fixedly connected by several connecting blocks, the rear side of the upper ring is fixedly connected with an adjusting block, there are two mounting blocks at the bottom of the adjusting block, and the adjusting block is hinged to the mounting block on the right, and the top of the mounting block on the left is fixedly connected to the protective cover, the inner cavities of the two mounting blocks are commonly penetrated by a threaded rod, the left end of the threaded rod is fixedly connected to a micro motor, the top of the micro motor is fixedly connected to the protective cover, and there are several between the two rings. Rectangular frame, and several of the rectangular frames are arranged in a circular array with the center of the ring as the center, the inner cavities of several of the rectangular frames are slidably connected to transmission plates, and the tops of several of the transmission plates are fixedly connected to the sides away from the center of the ring, and the tops of several of the insertion rods are inserted into the protective cover, the inner cavities of several of the transmission plates are penetrated by sliding rods, and the corresponding ends of several of the sliding rods are fixedly connected to touch blocks, the corresponding ends of several of the sliding rods are sleeved with springs, and the corresponding ends of several of the sliding rods are sleeved with circular rings, two L-shaped fixing rods are fixedly connected to the circular ring, and the corresponding sides of the two L-shaped fixing rods are fixedly connected to the transmission plate, and a buzzer is provided on the circular ring.

[0005] Preferably, a storage box is fixedly connected to the top of the bottom plate near the front side, and a movable plate is provided on the top of the storage box. Two pressing rods are provided through the inner cavity of the movable plate, and the two pressing rods are symmetrically arranged on the left and right. A plurality of engaging grooves are provided on the corresponding sides of the two pressing rods, and the engaging grooves are linearly arranged from top to bottom. A gear is provided in the inner cavity of the storage box, and the gear is located between the two pressing rods, and the gear is engaged with the adjacent engaging grooves. A transmission rod is provided through the center of the gear and is fixedly connected to it. A rotating ring is fixedly sleeved on the outer side of the transmission rod near the front end, and a handle is fixedly connected to the outer side of the rotating ring.

[0006] Preferably, two airbags are provided near the bottom of the storage box inner cavity, and the two airbags are symmetrically arranged on the left and right. Grease is stored in the inner cavities of the two airbags, and transmission tubes are connected to the rear sides of the two airbags, and the rear ends of the transmission tubes pass through the storage box.

[0007] A rotary punching mechanism for the side wall of a stainless steel drawn part and a method for using the same include the following steps:

[0008] S1: First, the worker places the stainless steel sheet on the surface of the workbench and starts the drawing cylinder to move downward. The drawing cylinder drives the rotating rod downward through the screw rod. The rotating rod can apply pressure to the surface of the stainless steel sheet and squeeze it into the opening on the workbench to complete the drawing of the stainless steel sheet.

[0009] S2: Afterwards, the motor starts to drive the screw to rotate, and the screw rotation drives the rotating rod to rotate. When the screw rotates, it can drive the rotating cylinder to move upward by engaging with the internal thread of the inner cavity of the rotating cylinder. When the rotating cylinder moves upward, the micro motor starts to drive the threaded rod to rotate. When the threaded rod rotates, it can drive the mounting block on the right to move. When the mounting block on the right moves, it can drive the collar on the top to rotate. When the collar on the top rotates, it can drive several rectangular frames to move. Since several transmission plates are hinged to the protective cover through the insertion rod, several transmission plates can move in opposite directions in the inner cavity of the rectangular frame, so that adjacent touch blocks contact the outside of the rotating rod. The upward movement of the rotating cylinder can drive several touch blocks to rotate and move upward, thereby detecting the outside of the rotating rod.

[0010] S3: When there is an adhesive tumor on the outside of the rotating rod, the touch block moves and the buzzer is activated. When the buzzer sounds, the staff can manually shake the handle to drive the transmission rod to rotate. When the transmission rod rotates, it drives the gear to rotate. The gear can drive the two pressing rods to move downward and squeeze the corresponding airbags. The airbags can spray the grease in the inner cavity into the inner cavity of the rotating rod through the transmission tube.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] The present invention can realize that when the drawing work is completed, the motor can drive the touch block to move upward to detect the bonding nodule on the outer side of the rotating rod through the mutual cooperation between the motor, the screw rod, the rotating rod, the collar, the micro motor, the mounting block, the threaded rod, the touch block, the transmission plate, the insertion rod, the connecting block, the rectangular frame, the slide rod, the spring, the L-shaped fixing rod and other components. When the deep drawing work is completed, the motor can drive the touch block to move upward to detect the bonding nodule on the outer side of the rotating rod. When the touch block touches the bonding nodule, the touch block can drive the slide rod to move, thereby triggering the buzzer to realize the detection of the bonding nodule.

[0013] The present invention achieves that when a buzzer sounds, the handle can be shaken to drive the pressing rod to move downward, squeezing the airbag, thereby causing the grease in the inner cavity of the airbag to spray out and lubricate the outer side of the rotating rod, making the rotating rod less likely to be adhered to the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a rear view of the structure of the present invention;

[0016] Figure 3 It is a front view of the structure of the present invention;

[0017] Figure 4 This is a rear view of the top plate structure of the component of the present invention;

[0018] Figure 5 This is a front view of the top plate structure of the component of the present invention;

[0019] Figure 6 This is a structural diagram of the component storage box of the present invention;

[0020] Figure 7 This is an exploded view of the internal structure of the rotating drum component of the present invention;

[0021] Figure 8 A top view of the collar structure of the component of the present invention;

[0022] Figure 9 for Figure 8 Enlarged view of point A in the middle.

[0023] Numbers in the figure: 1. lifting platform; 2. back plate; 3. lifting cylinder; 4. drawing cylinder; 5. top plate; 6. linkage plate; 7. support rod; 8. lifting rod; 9. positioning rod; 10. bottom plate; 11. rotating cylinder; 12. workbench; 13. protective cover; 14. motor; 15. storage box; 16. handle; 17. rotating ring; 18. transmission rod; 19. gear; 20. pressing rod; 21. movable plate; 22. L-shaped fixing rod; 23. transmission tube; 24. screw rod; 25. rotating rod; 26. collar; 27. adjustment block; 28. threaded rod; 29. ​​mounting block; 30. micro motor; 31. insertion rod; 32. connecting block; 33. touch block; 34. transmission plate; 35. rectangular frame; 36. slide rod; 37. spring. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-9The present invention provides a technical solution: a rotary punching mechanism for the side wall of a stainless steel drawn part, comprising a lifting platform 1, a back plate 2 being provided on the rear side of the lifting platform 1, a lifting cylinder 3 being provided on the right side of the back plate 2, a power output shaft of the lifting cylinder 3 being fixedly connected to the back plate 2, the lifting platform 1 being slidably connected to the back plate 2, a bottom plate 10 being fixedly connected to the top of the lifting platform 1, a support rod 7 being fixedly connected to the top of the bottom plate 10 near the four corners, and a top plate 5 being fixedly connected to the tops of several support rods 7, a drawing cylinder 4 being installed at the top center of the top plate 5, the bottom end of the power output shaft of the drawing cylinder 4 passing through the top plate 5, a linkage plate 6 being provided at the bottom of the top plate 5, a motor 14 being installed on the top of the linkage plate 6, the power output shaft of the drawing cylinder 4 being fixedly connected to the top of the motor 14, and the bottom of the linkage plate 6 being fixedly connected to the top of the motor 14 A lifting rod 8 is fixedly connected, and the bottom ends of several lifting rods 8 are fixedly connected to the top of the base plate 10. Two positioning rods 9 are fixedly connected near the left and right sides of the bottom of the linkage plate 6. The bottom ends of several positioning rods 9 are fixedly connected to the top of the base plate 10. A workbench 12 is provided on the top of the base plate 10. An opening is provided on the workbench 12. The bottom end of the power output shaft of the motor 14 is fixedly connected to a screw rod 24. The bottom end of the screw rod 24 is fixedly connected to a rotating rod 25. The outside of the screw rod 24 is provided with a rotating cylinder 11. The inner cavity of the rotating cylinder 11 is provided with an internal thread near the top. The screw rod 24 is engaged with the internal thread of the inner cavity of the rotating cylinder 11. The outside of the rotating rod 25 is provided with a protective cover 13, and the top of the protective cover 13 is fixedly connected to the bottom end of the rotating cylinder 11. The outer side of the rotating rod 25 is provided with a There are two collars 26, and the two collars 26 are symmetrically arranged up and down. There are several connecting blocks 32 between the two collars 26, and the several connecting blocks 32 are arranged in a circular array with the collar 26 as the center. The two collars 26 are fixedly connected by several connecting blocks 32. The rear side of the collar 26 located above is fixedly connected with an adjustment block 27. There are two mounting blocks 29 at the bottom of the adjustment block 27, and the adjustment block 27 is hinged to the mounting block 29 located on the right. The top of the mounting block 29 located on the left is fixedly connected to the protective cover 13. The inner cavities of the two mounting blocks 29 are commonly penetrated by a threaded rod 28. The left end of the threaded rod 28 is fixedly connected to a micro motor 30. The top of the micro motor 30 is fixedly connected to the protective cover 13. There are several rectangular frames 3 between the two collars 26. 5, and a plurality of rectangular frames 35 are arranged in a circular array with the center of the ring 26 as the center, the inner cavities of the plurality of rectangular frames 35 are slidably connected to the transmission plates 34, and the tops of the plurality of transmission plates 34 are fixedly connected to the sides away from the center of the ring 26, and the tops of the plurality of insertion rods 31 are inserted into the protective cover 13, the inner cavities of the plurality of transmission plates 34 are penetrated by sliding rods 36, and the corresponding ends of the plurality of sliding rods 36 are fixedly connected to the touch blocks 33, the corresponding ends of the plurality of sliding rods 36 are sleeved with springs 37, and the corresponding ends of the plurality of sliding rods 36 are sleeved with circular rings, two L-shaped fixing rods 22 are fixedly connected to the circular ring, and the corresponding sides of the two L-shaped fixing rods 22 are fixedly connected to the transmission plate 34, and a buzzer is provided on the circular ring.

[0026] A storage box 15 is fixedly connected to the top of the bottom plate 10 near the front side, and a movable plate 21 is provided on the top of the storage box 15. Two pressing rods 20 are provided in the inner cavity of the movable plate 21, and the two pressing rods 20 are symmetrically arranged on the left and right. A number of meshing grooves are provided on the corresponding sides of the two pressing rods 20, and the meshing grooves are linearly arranged from top to bottom. A gear 19 is provided in the inner cavity of the storage box 15, and the gear 19 is located between the two pressing rods 20, and the gear 19 is engaged with the adjacent meshing grooves. A transmission rod 18 is provided at the center of the gear 19 and is fixedly connected to it. A rotating ring 17 is fixedly sleeved on the outside of the transmission rod 18 near the front end, and a handle 16 is fixedly connected to the outside of the rotating ring 17. Two air bags are provided near the bottom of the inner cavity of the storage box 15, and the two air bags are symmetrically arranged on the left and right. Grease is stored in the inner cavities of the two air bags, and transmission tubes 23 are inserted into the rear sides of the two air bags, and the rear ends of the transmission tubes 23 pass through the storage box 15.

[0027] A rotary punching mechanism for the side wall of a stainless steel drawn part and a method for using the same include the following steps:

[0028] S1: First, the staff places the stainless steel sheet on the surface of the workbench 12 and starts the drawing cylinder 4 to move downward. The drawing cylinder 4 drives the rotating rod 25 to move downward through the screw rod 24. The rotating rod 25 can apply pressure to the surface of the stainless steel sheet and squeeze it into the opening on the workbench 12 to complete the drawing of the stainless steel sheet;

[0029] S2: Afterwards, the motor 14 is started, which can drive the screw rod 24 to rotate. When the screw rod 24 rotates, it can drive the rotating rod 25 to rotate. When the screw rod 24 rotates, it can drive the rotating cylinder 11 to move upward by engaging with the internal thread of the inner cavity of the rotating cylinder 11. When the rotating cylinder 11 moves upward, the micro motor 30 is started, which can drive the threaded rod 28 to rotate. When the threaded rod 28 rotates, it can drive the mounting block 29 on the right to move. When the mounting block 29 on the right moves, it can drive the collar 26 on the top to rotate. When the collar 26 on the top rotates, it can drive the plurality of rectangular frames 35 to move. Since the plurality of transmission plates 34 are hinged to the protective cover 13 through the insertion rod 31, the plurality of transmission plates 34 can move in opposite directions in the inner cavity of the rectangular frame 35, so that the adjacent touch blocks 33 contact the outer side of the rotating rod 25. The upward movement of the rotating cylinder 11 can drive the plurality of touch blocks 33 to rotate and move upward, thereby detecting the outer side of the rotating rod 25.

[0030] S3: When there is an adhesive tumor on the outside of the rotating rod 25, the touch block 33 moves and starts the buzzer. When the buzzer sounds, the staff can manually shake the handle 16 to drive the transmission rod 18 to rotate. When the transmission rod 18 rotates, it can drive the gear 19 to rotate. The gear 19 can drive the two pressing rods 20 to move downward and squeeze the corresponding airbags. The airbags can spray the grease in the inner cavity into the inner cavity of the rotating rod 25 through the transmission tube 23.

[0031] Working principle: First, the staff places the stainless steel sheet on the surface of the workbench 12 and starts the drawing cylinder 4 to move downward. The drawing cylinder 4 drives the rotating rod 25 to move downward through the screw rod 24. The rotating rod 25 can apply pressure to the surface of the stainless steel sheet and squeeze it into the opening on the workbench 12 to complete the drawing of the stainless steel sheet. After that, the motor 14 is started to drive the screw rod 24 to rotate. When the screw rod 24 rotates, it can drive the rotating rod 25 to rotate. When the screw rod 24 rotates, it can drive the rotating cylinder 11 to move upward by engaging with the internal thread of the inner cavity of the rotating cylinder 11. When the rotating cylinder 11 moves upward, the micro motor 30 is started to drive the threaded rod 28 to rotate. When the threaded rod 28 rotates, it can drive the mounting block 29 on the right to move. When the mounting block 29 on the right moves, it can drive the collar 26 at the top to rotate. When the collar 26 at the top rotates, it can drive several rectangular frames 35 to move. Since several transmission plates 34 are hinged to the protective cover 13 through the insertion rod 31, several transmission plates 34 can move in opposite directions in the inner cavity of the rectangular frame 35, so that the adjacent touch blocks 33 contact the outside of the rotating rod 25. The upward movement of the rotating cylinder 11 can drive several touch blocks 33 to rotate upward to detect the outside of the rotating rod 25. When there is an adhesive tumor on the outside of the rotating rod 25, the touch block 33 moves and starts the buzzer. When the buzzer sounds, the staff can manually shake the handle 16 to drive the transmission rod 18 to rotate. When the transmission rod 18 rotates, it can drive the gear 19 to rotate. The gear 19 can drive the two pressing rods 20 to move downward and squeeze the corresponding airbags. The airbags can spray the grease in the inner cavity into the inner cavity of the rotating rod 25 through the transmission tube 23.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rotary punching mechanism for the side wall of a stainless steel drawn part, comprising a lifting platform, characterized in that: There is a back plate on the rear side of the lifting platform, and a lifting cylinder is provided on the right side of the back plate. The power output shaft of the lifting cylinder is fixedly connected to the back plate, the lifting platform is slidably connected to the back plate, and the top of the lifting platform is fixedly connected to the bottom plate. The top of the bottom plate is fixedly connected to support rods near the four corners, and the tops of several support rods are fixedly connected to the top plate. A drawing cylinder is installed at the center of the top plate, and the bottom end of the power output shaft of the drawing cylinder passes through the top plate. There is a linkage plate at the bottom of the top plate, and a motor is installed on the top of the linkage plate. The power output shaft of the drawing cylinder is fixedly connected to the top of the motor, and the bottom of the linkage plate is fixedly connected to lifting rods near the four corners, and the bottom ends of several lifting rods The bottom of the linkage plate is fixedly connected to the top of the bottom plate, and two positioning rods are fixedly connected near the left and right sides of the bottom of the linkage plate. The bottom ends of the positioning rods are fixedly connected to the top of the bottom plate. A workbench is provided on the top of the bottom plate, and an opening is provided on the workbench. The bottom end of the motor power output shaft is fixedly connected to a screw rod, and the bottom end of the screw rod is fixedly connected to a rotating rod. A rotating cylinder is provided on the outside of the screw rod, and an internal thread is provided near the top of the inner cavity of the rotating cylinder. The screw rod is engaged with the internal thread of the inner cavity of the rotating cylinder. A protective cover is provided on the outside of the rotating rod, and the top of the protective cover is fixedly connected to the bottom end of the rotating cylinder. Two rings are provided on the outside of the rotating rod, and the two rings It is symmetrically arranged up and down, with several connecting blocks between the two rings, and the several connecting blocks are arranged in a circular array with the center of the ring as the center. The two rings are fixedly connected by several connecting blocks, and the rear side of the upper ring is fixedly connected with an adjustment block; there are two mounting blocks at the bottom of the adjustment block, and the adjustment block is hinged to the mounting block on the right, and the top of the mounting block on the left is fixedly connected to the protective cover. A threaded rod is provided through the inner cavity of the two mounting blocks, and a micro motor is fixedly connected to the left end of the threaded rod, and the top of the micro motor is fixedly connected to the protective cover; there are several rectangular frames between the two rings, and the several rectangular frames are connected with the rings With the center of the circle as the center, the groups are arranged in a circular array. The inner cavities of the several rectangular frames are slidably connected to the transmission plates, and the tops of the several transmission plates are fixedly connected to the sides away from the center of the rings, and the tops of the several insertion rods are inserted into the protective covers. Sliding rods are passed through the inner cavities of the several transmission plates, and the corresponding ends of the several sliding rods are fixedly connected to the touch blocks; the corresponding ends of the several sliding rods are sleeved with springs, and the corresponding ends of the several sliding rods are sleeved with circular rings, two L-shaped fixing rods are fixedly connected to the circular ring, and the corresponding sides of the two L-shaped fixing rods are fixedly connected to the transmission plate, and a buzzer is provided on the circular ring.

2. The rotary punching mechanism for the side wall of a stainless steel drawn part according to claim 1, characterized in that: A storage box is fixedly connected to the top of the bottom plate near the front side, and a movable plate is provided on the top of the storage box. Two pressing rods are provided through the inner cavity of the movable plate, and the two pressing rods are symmetrically arranged on the left and right. A plurality of engaging grooves are provided on the corresponding sides of the two pressing rods, and the engaging grooves are linearly arranged from top to bottom. A gear is provided in the inner cavity of the storage box, and the gear is located between the two pressing rods, and the gear is engaged with the adjacent engaging grooves. A transmission rod is provided through the center of the gear and is fixedly connected to it. A rotating ring is fixedly sleeved on the outer side of the transmission rod near the front end, and a handle is fixedly connected to the outer side of the rotating ring.

3. The rotary punching mechanism for the side wall of a stainless steel drawn part according to claim 2, characterized in that: Two air bags are provided near the bottom of the storage box cavity, and the two air bags are symmetrically arranged on the left and right. Grease is stored in the two air bag cavities, and transmission tubes are plugged into the rear sides of the two air bags, and the rear ends of the transmission tubes pass through the storage box.

4. The method for using the rotary punching mechanism for the side wall of a stainless steel drawn part according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: First, the worker places the stainless steel sheet on the surface of the workbench and starts the drawing cylinder to move downward. The drawing cylinder drives the rotating rod downward through the screw rod. The rotating rod can apply pressure to the surface of the stainless steel sheet and squeeze it into the opening on the workbench to complete the drawing of the stainless steel sheet. S2: Afterwards, the motor starts to drive the screw to rotate, and the screw rotation drives the rotating rod to rotate. When the screw rotates, it can drive the rotating cylinder to move upward by engaging with the internal thread of the inner cavity of the rotating cylinder. When the rotating cylinder moves upward, the micro motor starts to drive the threaded rod to rotate. When the threaded rod rotates, it can drive the mounting block on the right to move. When the mounting block on the right moves, it can drive the collar on the top to rotate. When the collar on the top rotates, it can drive several rectangular frames to move. Since several transmission plates are hinged to the protective cover through the insertion rod, several transmission plates can move in opposite directions in the inner cavity of the rectangular frame, so that adjacent touch blocks contact the outside of the rotating rod. The upward movement of the rotating cylinder can drive several touch blocks to rotate and move upward, thereby detecting the outside of the rotating rod. S3: When there is an adhesive tumor on the outside of the rotating rod, the touch block moves and the buzzer is activated. When the buzzer sounds, the staff can manually shake the handle to drive the transmission rod to rotate. When the transmission rod rotates, it drives the gear to rotate. The gear can drive the two pressing rods to move downward and squeeze the corresponding airbags. The airbags can spray the grease in the inner cavity into the inner cavity of the rotating rod through the transmission tube.

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