Gearbox reversing transmission device based on lubrication equipment production

Abstract

This invention provides a gearbox reversing transmission device based on lubrication equipment manufacturing, relating to the field of lubrication equipment manufacturing technology. It includes: a reversing gearbox, a drive shaft assembly, a second output shaft, rubber sealing rings, and an arc-shaped support. An input end sleeve is rotatably mounted on the outside of a first output end sleeve on the gearbox and sealed by two sets of rubber sealing rings. The drive shaft assembly is installed inside the reversing gearbox. A second output shaft is rotatably inserted into the second output end sleeve via bearings, and an upper interlaced helical gear is fixedly mounted on the second output shaft. Both ends protrude through sealing covers and are sealed by mechanical seals. The right end of the reversing gearbox is also rotatably mounted inside the arc-shaped support. Rotating the operating lever causes the reversing gearbox to rotate within the arc-shaped support, changing the direction of the second output shaft. This solves the problem of the input and output shafts having relatively fixed directions, sometimes requiring a change in the output shaft direction.

Description

Technical Field

[0001] This invention relates to the field of lubrication equipment manufacturing technology, and in particular to a gearbox reversing transmission device based on lubrication equipment manufacturing. Background Technology

[0002] Gearboxes are often used in the production of lubrication equipment. Gearboxes change the torque, speed, and direction of motion transmitted from the drive shaft to the driven shaft according to different working conditions. A gearbox typically consists of a housing and several gear pairs.

[0003] However, in current traditional gearboxes, the directions between the input and output shafts are relatively fixed. Sometimes it is necessary to change the direction of the output shaft to facilitate production and processing. Therefore, it is necessary to add a transmission device for adjustment, which is quite troublesome. Summary of the Invention

[0004] In view of this, the present invention provides a gearbox reversing transmission device based on lubrication equipment, which disengages the transmission shaft assembly from the first output shaft by rotating the optical shaft rod, and rotates the operating lever to facilitate the reversing gearbox to rotate within the arc-shaped support, thereby changing the direction of the second output shaft.

[0005] This invention provides a gearbox reversing transmission device based on lubrication equipment, specifically including: a speed change gearbox, a reversing gearbox, a drive shaft assembly, a second output shaft, a rubber sealing ring, and an arc-shaped support.

[0006] One end of the reversing gearbox is provided with an input end sleeve, and the other end is welded with a rear retainer and an adjusting sleeve, with the adjusting sleeve welded to the outside of the rear retainer. The input end sleeve is rotatably fitted onto the outside of the first output end sleeve on the transmission gearbox and sealed by two sets of rubber sealing rings, which are respectively embedded in the retaining ring grooves on the inner wall of the input end sleeve and the outer wall of the first output end sleeve. The drive shaft assembly is installed inside the reversing gearbox, with one end connected to the first output shaft inside the transmission gearbox and the other end mounted via a bearing. Inside the rear cassette, the left end of the reversing gearbox is also provided with two sets of longitudinal second output end tubes. The outer ends of the second output end tubes are respectively provided with external connecting end caps. The outer side of the external connecting end caps is connected to a sealing cap by bolts. The second output shaft is also rotatably inserted through the second output end tubes via bearings, and an upper interlaced helical gear is fixedly installed on the second output shaft. Both ends pass through the sealing caps and are sealed by mechanical seals. The right end of the reversing gearbox is also rotatably attached to the arc-shaped support, and an operating rod is rotatably inserted through the upper side of the outer end of the arc-shaped support.

[0007] Optionally, a worm gear is also fixedly mounted on the adjusting cylinder, and the worm gear meshes with the worm on the operating rod. An operating handwheel is also provided at the outer end of the operating rod.

[0008] Optionally, the drive shaft assembly includes a left input shaft, a key shaft, a lower interlocking helical gear, and a right input shaft;

[0009] One end of the left input shaft is provided with a hexagonal insert A, which is inserted into the hexagonal slot at the outer end of the first output shaft. The other end of the left input shaft is also provided with a hexagonal slot, and the hexagonal slot has a through hole. The inner hole of the lower interlaced helical gear has a keyway and is slidably inserted into the key shaft. Both ends of the key shaft are provided with hexagonal inserts B. The two sets of hexagonal inserts B are respectively provided with threaded fixing holes. One set of hexagonal inserts B is inserted into the hexagonal slot on the left input shaft and fixed with bolts. The other set of hexagonal inserts B is inserted into the hexagonal slot at the left end of the right input shaft and is also fixed with bolts. The right end of the right input shaft is also provided with a spline structure, which is slidably clamped onto the inner ring of the bearing, and the bearing is clamped in the rear retainer.

[0010] Optionally, when the hexagonal insert A of the left input shaft is inserted into the hexagonal slot at the outer end of the first output shaft, the right end of the right input shaft is inserted into the adjusting cylinder and is flush with the left end of the adjusting cylinder.

[0011] Optionally, the outer diameter of the key shaft is smaller than the outer diameters of the left input shaft and the right input shaft, respectively, the length of the key shaft is twice the width of the lower interlaced helical gear, and the upper end of the lower interlaced helical gear meshes with the upper interlaced helical gear for transmission.

[0012] Optionally, two sets of clamping plates are fixedly connected to the right input shaft, and a sleeve plate is fitted on it through bearings. The two sets of clamping plates are respectively attached to both sides of the sleeve plate. The lower side of the sleeve plate is also provided with a set of through holes and two sets of threaded holes. The through holes are located in the middle of the bottom of the sleeve plate, and the two sets of threaded holes are respectively located on both sides of the through holes.

[0013] Optionally, a light shaft rod is slidably inserted into the through hole, and the light shaft rod is rotatably inserted into the lower end of the reversing gear box. An operating handwheel is provided at the outer end, and a drive gear is fixedly installed on it. Threaded rods are respectively engaged by threads in the threaded holes, and driven gears are fixedly installed on the threaded rods.

[0014] Optionally, the two sets of driven gears mesh with the drive gears respectively, the transmission ratio between the drive gear and the two sets of driven gears is 1:1, and the optical shaft, drive gear, two sets of threaded rods, and driven gears together form the operating part.

[0015] Beneficial effects

[0016] According to various embodiments of the present invention, the gearbox reversing transmission device, compared with the conventional gearbox, allows the transmission shaft assembly to be disengaged from the first output shaft by rotating the optical shaft rod, and the operating lever to be rotated to facilitate the reversing gearbox to rotate within the arc-shaped support, thereby changing the direction of the second output shaft.

[0017] Furthermore, the transmission shaft assembly and the second output shaft are connected by a transmission shaft assembly and a second output shaft. A lower interlocking helical gear is installed on the transmission shaft assembly and an upper interlocking helical gear is installed on the second output shaft. The transmission shaft assembly is connected to the first output shaft by a plug-in connection, which causes the transmission gearbox to drive the transmission shaft assembly to rotate. In turn, the meshing of the lower interlocking helical gear and the upper interlocking helical gear drives the second output shaft to rotate.

[0018] Furthermore, by setting up an operating unit, the handwheel at the outer end of the optical shaft is rotated, and the meshing of the drive gear with the two sets of driven gears drives the two sets of threaded rods to rotate. This causes the sleeve plate to move to the right within the reversing gearbox, allowing the hexagonal insert A on the left input shaft to be pulled out from the hexagonal slot on the first output shaft. This makes the reversing gearbox rotate more smoothly within the arc-shaped support. The self-locking property of the threaded rods prevents the transmission shaft assembly from moving on its own. The meshing and locking performance between the upper and lower interlocking helical gears allows the key shaft to slide to the right within the lower interlocking helical gear, ensuring that the lower and upper interlocking helical gears are always meshed.

[0019] In addition, by setting up an arc-shaped support, the reversing gearbox is supported. A worm gear is fixedly mounted on the adjusting cylinder. By rotating the operating lever, the worm drives the worm gear to rotate, which in turn drives the reversing gearbox to rotate within the arc-shaped support. This changes the direction of the second output end through the cylinder and the second output shaft installed inside it via a bearing. The unidirectional transmission of the worm and worm gear is used to lock the reversing gearbox in place, preventing it from rotating on its own.

[0020] In addition, by fitting the input end sleeve of the reversing gearbox onto the first output end sleeve of the transmission gearbox, the transmission gearbox and the reversing gearbox can be connected, allowing the lubricating oil between them to flow between them, and the connection is sealed by a rubber sealing ring to prevent the lubricating oil from leaking from the connection point. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0022] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0023] In the attached diagram:

[0024] Figure 1 A schematic diagram of the overall structure according to an embodiment of the present invention is shown;

[0025] Figure 2 An embodiment according to the present invention is shown. Figure 1 A schematic diagram of the structure when the sealing cap is removed;

[0026] Figure 3 An embodiment according to the present invention is shown. Figure 2Enlarged structural diagram at point A in the diagram;

[0027] Figure 4 An embodiment according to the present invention is shown. Figure 2 A schematic diagram of the structure after removing the central arc support and vertically slicing the right end of the reversing gearbox;

[0028] Figure 5 An embodiment according to the present invention is shown. Figure 2 Schematic diagram of the structure after removing the arc-shaped support and cutting the front and bottom ends of the reversing gearbox;

[0029] Figure 6 An embodiment according to the present invention is shown. Figure 5 Front view structural diagram;

[0030] Figure 7 An embodiment according to the present invention is shown. Figure 6 A schematic diagram of the structure after cutting off the upper end of the first output end through tube, the upper end of the input end through tube, and the upper end of the adjusting tube;

[0031] Figure 8 An embodiment according to the present invention is shown. Figure 7 Enlarged structural diagram at point B;

[0032] Figure 9 An embodiment according to the present invention is shown. Figure 7 Enlarged structural diagram at point C;

[0033] Figure 10 An embodiment according to the present invention is shown. Figure 7 A top-view structural diagram;

[0034] Figure 11 An exploded structural diagram of the drive shaft assembly according to an embodiment of the present invention is shown.

[0035] Figure 12 An embodiment according to the present invention is shown. Figure 11 Schematic diagram of the structure from the right-hand side.

[0036] Figure Labels

[0037] 1. Gearbox; 101. First output end sleeve; 102. First output shaft; 2. Reversing gearbox; 201. Input end sleeve; 202. Rear retainer; 203. Adjusting sleeve; 2031. Worm gear; 204. Second output end sleeve; 2041. External connecting end cover; 205. Sealing cover; 3. Drive shaft assembly; 301. Left input shaft; 3011. Hexagonal insert A; 302. Key shaft; 3021. Hexagonal... Insert block B; 303, Lower interlaced helical gear; 304, Right input shaft; 3041, Clamping plate; 305, Sleeve plate; 3051, Through hole; 3052, Threaded hole; 4, Operating part; 401, Optical shaft rod; 4011, Drive gear; 402, Threaded rod; 4021, Driven gear; 5, Second output shaft; 501, Upper interlaced helical gear; 6, Rubber sealing ring; 7, Arc-shaped support; 701, Operating lever; 702, Worm gear. Detailed Implementation

[0038] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0039] Example: Please refer to Figures 1 to 12 :

[0040] This invention proposes a gearbox reversing transmission device based on lubrication equipment, comprising: a speed change gearbox 1, a reversing gearbox 2, a transmission shaft assembly 3, a second output shaft 5, a rubber sealing ring 6, and an arc-shaped support 7;

[0041] One end of the reversing gearbox 2 is provided with an input end through-tube 201, and the other end is welded with a rear retainer 202 and an adjusting tube 203. The adjusting tube 203 is welded to the outside of the rear retainer 202. The input end through-tube 201 is rotatably fitted onto the outside of the first output end through-tube 101 on the transmission gearbox 1, and is sealed by two sets of rubber sealing rings 6. The two sets of rubber sealing rings 6 are respectively embedded in the retaining ring grooves on the inner wall of the input end through-tube 201 and the outer wall of the first output end through-tube 101. The drive shaft assembly 3 is installed in the reversing gearbox 2, one end of which is connected to the first output shaft 102 in the transmission gearbox 1, and the other end is installed on the rear through a bearing. Inside the cassette 202, the left end of the reversing gearbox 2 is also provided with two sets of longitudinal second output end tubes 204. The outer ends of the second output end tubes 204 are respectively provided with external connecting end caps 2041. The outer side of the external connecting end caps 2041 is connected to a sealing cap 205 by bolts. The second output shaft 5 is also rotatably inserted through the second output end tube 204 via bearings. The upper interlaced helical gear 501 is fixedly installed on the second output shaft 5. Both ends pass through the sealing caps 205 and are sealed by mechanical seals. The right end of the reversing gearbox 2 is also rotatably attached to the arc-shaped support 7. The upper side of the outer end of the arc-shaped support 7 is rotatably inserted with an operating rod 701.

[0042] Furthermore, according to embodiments of the present invention, such as Figure 1 and Figure 8 As shown, a worm gear 2031 is also fixedly mounted on the adjusting cylinder 203, and the worm gear 2031 meshes with the worm 702 on the operating lever 701. The outer end of the operating lever 701 is also provided with an operating handwheel. By rotating the operating lever 701, the worm gear 2031 is driven to rotate through the worm 702, which in turn drives the reversing gear box 2 to rotate within the arc-shaped support 7, changing the direction of the second output end through cylinder 204 and the second output shaft 5 installed inside it through bearings. The unidirectional transmission of the worm 702 and the worm gear 2031 is used to lock the reversing gear box 2, preventing the reversing gear box 2 from rotating on its own.

[0043] Furthermore, according to embodiments of the present invention, such as Figure 4 , Figure 5 and Figure 11As shown, the transmission shaft assembly 3 includes a left input shaft 301, a key shaft 302, a lower interlaced helical gear 303, and a right input shaft 304. One end of the left input shaft 301 is provided with a hexagonal insert A3011, which is inserted into a hexagonal slot at the outer end of the first output shaft 102. The other end of the left input shaft 301 is also provided with a hexagonal slot, which has a through hole. The lower interlaced helical gear 303 has a keyway in its inner hole and is slidably inserted into the key shaft 302. Both ends of the key shaft 302 are respectively provided with hexagonal inserts B3021, and each set of hexagonal inserts B3021 has a threaded fixing hole. A set of hexagonal inserts B3021 are inserted into the hexagonal slots on the left input shaft 301 and fixed with bolts. Another set of hexagonal inserts B3021 are inserted into the hexagonal slots on the left end of the right input shaft 304 and also fixed with bolts. The right end of the right input shaft 304 is also provided with a spline structure, which is slidably mounted on the inner ring of the bearing. The bearing is mounted in the rear retainer 202. Two sets of retaining plates 3041 are also fixedly connected to the right input shaft 304, and a sleeve plate 305 is fitted on it through the bearing. The two sets of retaining plates 3041 are respectively attached to the two sides of the sleeve plate 305. A set of through holes 3 are also provided on the lower side of the sleeve plate 305. 051 and two sets of threaded holes 3052, with the through hole 3051 located in the middle of the bottom of the sleeve plate 305. The two sets of threaded holes 3052 are respectively located on both sides of the through hole 3051. A light shaft rod 401 is slidably inserted into the through hole 3051, and the light shaft rod 401 is rotatably inserted into the lower end of the reversing gear box 2. An operating handwheel is provided at the outer end, and a drive gear 4011 is fixedly installed on it. Threaded rods 402 are threadedly engaged in the threaded holes 3052, and driven gears 4021 are fixedly installed on the threaded rods 402. The two sets of driven gears 4021 mesh with the drive gears 4011 respectively. The drive gear 4011 and the two sets of driven gears... The transmission ratios of 4021 are 1:1, and the optical shaft rod 401, the drive gear 4011, the two sets of threaded rods 402, and the driven gear 4021 together form the operating part 4. By rotating the handwheel at the outer end of the optical shaft rod 401, the drive gear 4011 is driven to rotate. The meshing of the drive gear 4011 with the two sets of driven gears 4021 drives the two sets of threaded rods 402 to rotate, causing the sleeve plate 305 to move to the right in the reversing gear box 2. The hexagonal insert A3011 on the left input shaft 301 is pulled out from the hexagonal slot on the first output shaft 102. The self-locking property of the threaded rod 402 is used to prevent the transmission shaft assembly 3 from moving on its own.

[0044] Furthermore, according to embodiments of the present invention, such as Figure 8As shown, when the hexagonal insert A3011 of the left input shaft 301 is inserted into the hexagonal slot at the outer end of the first output shaft 102, the right end of the right input shaft 304 is inserted into the adjusting cylinder 203 and is flush with the left end of the adjusting cylinder 203. When the optical shaft rod 401 is rotated to drive the transmission shaft assembly 3 to move to the right in the reversing gear box 2, the right input shaft 304 can move to the right in the adjusting cylinder 203.

[0045] Furthermore, according to embodiments of the present invention, such as Figure 6 , Figure 11 and Figure 12 As shown, the outer diameter of the key shaft 302 is smaller than the outer diameters of the left input shaft 301 and the right input shaft 304, respectively. The length of the key shaft 302 is twice the width of the lower interlaced helical gear 303, allowing the key shaft 302 to slide to the right within the lower interlaced helical gear 303. Figure 5 As shown, the upper end of the lower interlocking helical gear 303 meshes with the upper interlocking helical gear 501 for transmission. Utilizing the mutual meshing and locking performance between the upper interlocking helical gear 501 and the lower interlocking helical gear 303, the lower interlocking helical gear 303 and the upper interlocking helical gear 501 are always meshed. In turn, the meshing of the lower interlocking helical gear 303 and the upper interlocking helical gear 501 drives the second output shaft 5 to rotate.

[0046] The specific usage and function of this embodiment: In use, by rotating the handwheel at the outer end of the optical shaft rod 401, the drive gear 4011 is driven to rotate. The meshing of the drive gear 4011 with the two sets of driven gears 4021 drives the two sets of threaded rods 402 to rotate, causing the sleeve plate 305 to move to the right within the reversing gearbox 2. This pulls the hexagonal insert A3011 on the left input shaft 301 out of the hexagonal slot on the first output shaft 102. The self-locking property of the threaded rods 402 prevents the transmission shaft assembly 3 from moving on its own. Simultaneously, the meshing and locking performance between the upper interlocking helical gear 501 and the lower interlocking helical gear 303 allows the key shaft 302 to slide to the right within the lower interlocking helical gear 303, ensuring that the lower interlocking helical gear 303 and the upper interlocking helical gear 501 are always meshed. By rotating the operating lever 701, the worm gear 702 drives the worm wheel 2031 to rotate, which in turn drives the reversing gearbox 2 to rotate within the arc-shaped support 7. This changes the direction of the second output end through-tube 204 and the second output shaft 5 mounted inside it via bearings. The unidirectional transmission of the worm gear 702 and worm wheel 2031 is used to lock the reversing gearbox 2 in place, preventing it from rotating on its own. At the same time, by disengaging the transmission shaft assembly 3 from the first output shaft 102, the reversing gearbox 2 rotates more smoothly within the arc-shaped support 7. The insertion connection between the transmission shaft assembly 3 and the first output shaft 102 causes the transmission gearbox 1 to drive the transmission shaft assembly 3 to rotate, which in turn drives the second output shaft 5 to rotate through the meshing of the lower interlocking helical gear 303 and the upper interlocking helical gear 501.

[0047] Finally, it should be noted that when describing the position of each component and the mating relationship between them, the present invention usually uses one or a pair of components as examples. However, those skilled in the art should understand that such positions, mating relationships, etc., are also applicable to other components or other pairs of components.

[0048] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A gearbox reversing transmission device based on lubrication equipment, characterized in that, include: Speed ​​change gearbox (1), reversing gearbox (2), drive shaft assembly (3), second output shaft (5), rubber seal (6) and arc support (7); One end of the reversing gearbox (2) is provided with an input end sleeve (201), and the other end is welded with a rear retainer sleeve (202) and an adjusting sleeve (203). The adjusting sleeve (203) is welded to the outside of the rear retainer sleeve (202). The input end sleeve (201) is rotatably fitted on the outside of the first output end sleeve (101) on the gearbox (1) and sealed by two sets of rubber sealing rings (6). The two sets of rubber sealing rings (6) are respectively embedded in the retaining ring grooves on the inner wall of the input end sleeve (201) and the outer wall of the first output end sleeve (101). The transmission shaft assembly (3) is installed in the reversing gearbox (2), one end of which is connected to the first output shaft (102) in the gearbox (1), and the other end is installed by a bearing. Inside the rear cassette (202), the left end of the reversing gearbox (2) is also provided with two sets of longitudinal second output end tubes (204). The outer ends of the second output end tubes (204) are respectively provided with external connecting end caps (2041). The outer side of the external connecting end caps (2041) is connected to a sealing cap (205) by bolts. The second output end tubes (204) are also rotatably inserted through the bearings, and the second output shaft (5) is fixedly installed on the second output shaft (5). The two ends pass through the sealing caps (205) and are sealed by mechanical seals. The right end of the reversing gearbox (2) is also rotatably attached to the arc-shaped support (7), and the upper side of the outer end of the arc-shaped support (7) is rotatably inserted with an operating rod (701). The regulating cylinder (203) is also fixedly fitted with a worm gear (2031), and the worm gear (2031) meshes with the worm (702) on the operating lever (701). The outer end of the operating lever (701) is also provided with an operating handwheel. The drive shaft assembly (3) includes a left input shaft (301), a key shaft (302), a lower interlocking helical gear (303), and a right input shaft (304). One end of the left input shaft (301) is provided with a hexagonal insert A (3011), which is inserted into the hexagonal slot at the outer end of the first output shaft (102) through the hexagonal insert A (3011). The other end of the left input shaft (301) is also provided with a hexagonal slot, and the hexagonal slot is provided with a through hole. The inner hole of the lower interlaced helical gear (303) is provided with a keyway, which is slidably inserted into the key shaft (302). The two ends of the key shaft (302) are respectively provided with hexagonal inserts B (3021). The hexagonal inserts B (3021) are provided with threaded fixing holes. One set of hexagonal inserts B (3021) is inserted into the hexagonal slot on the left input shaft (301) and fixed by bolts. Another set of hexagonal inserts B (3021) is inserted into the hexagonal slot at the left end of the right input shaft (304) and also fixed by bolts. The right end of the right input shaft (304) is also provided with a spline structure, which is slidably mounted on the inner ring of the bearing through the spline structure, and the bearing is mounted in the rear retainer (202). When the hexagonal insert A (3011) of the left input shaft (301) is inserted into the hexagonal slot at the outer end of the first output shaft (102), the right end of the right input shaft (304) is inserted into the adjusting cylinder (203) and is flush with the left end of the adjusting cylinder (203).

2. The gearbox reversing transmission device based on lubrication equipment as described in claim 1, characterized in that: The outer diameter of the key shaft (302) is smaller than the outer diameters of the left input shaft (301) and the right input shaft (304), respectively. The length of the key shaft (302) is twice the width of the lower interlaced helical gear (303), and the upper end of the lower interlaced helical gear (303) meshes with the upper interlaced helical gear (501) for transmission.

3. The gearbox reversing transmission device based on lubrication equipment as described in claim 2, characterized in that: Two sets of clamping plates (3041) are fixedly connected to the right input shaft (304), and a sleeve plate (305) is fitted on it through bearings. The two sets of clamping plates (3041) are respectively attached to the two sides of the sleeve plate (305). The lower side of the sleeve plate (305) is also provided with a set of through holes (3051) and two sets of threaded holes (3052). The through hole (3051) is located in the middle of the bottom of the sleeve plate (305), and the two sets of threaded holes (3052) are respectively located on both sides of the through hole (3051).

4. The gearbox reversing transmission device based on lubrication equipment as described in claim 3, characterized in that: A light shaft rod (401) is slidably inserted in the through hole (3051), and the light shaft rod (401) is rotatably inserted in the lower end of the reversing gear box (2). An operating handwheel is provided at the outer end, and a drive gear (4011) is fixedly installed on it. Threaded rods (402) are respectively threaded in the threaded hole (3052), and a driven gear (4021) is fixedly installed on the threaded rod (402).

5. The gearbox reversing transmission device based on lubrication equipment as described in claim 4, characterized in that: The two sets of driven gears (4021) mesh with the drive gear (4011) respectively. The transmission ratio between the drive gear (4011) and the two sets of driven gears (4021) is 1:

1. The optical shaft (401), the drive gear (4011), the two sets of threaded rods (402), and the driven gears (4021) together form the operating part (4).

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