Lightweight planetary gearbox planet carrier structure

Abstract

The application provides a light-weight planetary gear box planet carrier structure and relates to the technical field of wind power gear boxes.The planet carrier structure comprises a holding part, a convenient removal part arranged inside the holding part, and an adjusting part arranged inside the convenient removal part.A transmission rod is rotatably connected to the adjusting carrier, and in the process of rotation, the transmission rod is adjusted to be connected to different groups of central control gears through the adjusting groove under the action of the thread in cooperation with the auxiliary block, so that the normal operation of the generator is maintained in the mutual replacement mode, and the idle central control gears are conveniently maintained and repaired.The planet carrier is usually used to fix a single group of planetary gear trains, so that the whole wind power generator needs to be shut down for a long time during maintenance, which reduces the total power generation efficiency after the shutdown and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power gearboxes, and in particular to a lightweight planetary gearbox planet carrier structure. Background Art

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives the rotor to rotate and ultimately outputs alternating current. A wind turbine gearbox is an important component of a wind turbine. Its main function is to transmit the power generated by the wind wheel under the action of wind to the generator and make it obtain a corresponding speed. The planetary carrier of the wind turbine gearbox is an essential component for fixing the planetary gears. The planetary gears are prone to wear after long-term use. In order to maintain the normal operation of the wind turbine, the planetary gears inside the gearbox need to be regularly inspected and processed. However, as far as the current planetary carrier is concerned, it usually fixes a single set of planetary gear trains, resulting in the need to shut down the entire wind turbine for a long time during the maintenance process, which reduces the overall power generation efficiency after the shutdown and maintenance process. At the same time, during the maintenance process, the planetary gears are usually fixed inside the planetary carrier, resulting in the need to disassemble and repair the planetary gears during the maintenance process, making the maintenance process too cumbersome. Summary of the Invention

[0003] In view of this, the present invention provides a lightweight planetary gearbox planetary carrier structure, which has a convenient disassembly part and an adjustment part. By providing a plug-in groove and a mounting groove on the mounting cylinder, it is convenient to plug the disassembly block and the external gear through the mounting groove, thereby facilitating its stability, so that the external gear can be disassembled by disassembly, thereby facilitating its maintenance at the time of disassembly, and the mounting groove facilitates the docking of the locking block and the docking rod, so that the mounting cylinder and the middle solid ring can be locked, thereby facilitating its use, and by rotating the transmission rod to connect the adjustment frame, it cooperates with the auxiliary block under the action of the thread to adjust the transmission rod through the adjustment groove to dock with different groups of central control gears during the rotation process, thereby maintaining the normal operation of the generator in a mutually interchangeable manner, thereby facilitating the maintenance of idle central control gears, and making it convenient to use.

[0004] The application provides a light-weight planetary gear box planet carrier structure, which specifically comprises a holding part, a convenient dismounting part and an adjusting part, characterized in that the holding part comprises a middle fixed ring and a butt joint groove; the middle fixed ring adopts a circular ring structure, a circular protrusion is arranged on the inner wall of the middle fixed ring, and a butt joint groove with a rectangular structure is arranged on the outer wall of the middle fixed ring; the convenient dismounting part is arranged in the holding part, a mounting cylinder of the convenient dismounting part is arranged between the middle fixed ring and an upper pressing ring of the holding part, a plug-in groove of the mounting cylinder is plugged with a butt joint rod of the holding part, a plug-in groove of the mounting cylinder is plugged with a locking block of the holding part, and the convenient dismounting part comprises a dismounting block; the dismounting block adopts a circular arc block structure, a shaft hole is arranged at the middle position of the dismounting block, a pull handle is arranged on the outer wall of the dismounting block, and the dismounting block needs to be used in cooperation with two groups of dismounting blocks and is plugged into a mounting groove; the adjusting part is arranged in the convenient dismounting part, a transmission rod of the adjusting part is rotationally connected to a pressing plate of the convenient dismounting part, a middle control gear of the adjusting part is connected to an external gear of the convenient dismounting part through a clamping tooth, an auxiliary block of the adjusting part is fixed to the top of the upper pressing ring through a screw, and the adjusting part comprises a butt joint ring and a control groove; the butt joint ring adopts a circular ring structure, is fixed to the outside of the transmission rod, and is provided with a control groove with a circular ring through hole; and the control groove is provided with a rectangular protrusion.

[0005] Optionally, the butt joint rod adopts a hexagonal prism structure, a cylindrical protrusion is arranged on the bottom surface of each of the two groups of butt joint rods, and a threaded rod protrusion is arranged on the cylindrical protrusion of each of the two groups of butt joint rods.

[0006] Optionally, the upper pressing ring adopts a circular ring structure, is provided with a counterbore, and comprises two groups of upper pressing rings; the two groups of upper pressing rings are arranged on the upper and lower sides of the middle fixed ring; the locking block adopts a cylindrical structure, is provided with a hexagonal prism groove and a threaded groove, is plugged into the upper pressing ring, and is connected to the butt joint rod through threads.

[0007] Optionally, the mounting cylinder adopts a cylindrical structure, is provided with a circular insertion hole on the bottom surface of each of the two groups of mounting cylinders, and is provided with a plug-in groove with a circular through hole structure.

[0008] Optionally, the mounting groove is a rectangular through hole, is provided with a circular arc groove at the upper end and the lower end, and is arranged on the outer wall of the mounting cylinder.

[0009] Optionally, the external gear adopts a cylindrical gear structure, is provided with a cylindrical protrusion, and is rotationally connected between the two groups of dismounting blocks; the pressing plate adopts a cylindrical structure, is provided with a circular protrusion on the outer wall, is provided with a cylindrical insertion block at the bottom of the circular protrusion on the outer wall, is provided with a circular protrusion on the inner wall, and is plugged into the mounting cylinder through the cylindrical insertion block.

[0010] Optionally, the transmission rod adopts a cylindrical structure, and is provided with a circular protrusion on the outer wall.

[0011] Optionally, the adjusting part further comprises a connecting slot; the central control gear is a cylindrical gear structure, a cylindrical protrusion is arranged on the central control gear, a circular through hole is arranged on the cylindrical protrusion of the central control gear, the central control gear is rotationally connected to the outer wall of the transmission rod, and the circular through hole of the central control gear is connected with the rectangular groove-shaped connecting slot.

[0012] Optionally, the adjusting part further comprises an adjusting frame and an auxiliary block; the adjusting frame is a threaded rod structure, a handle is arranged on the adjusting frame, a circular through hole is arranged on the adjusting frame, and the adjusting frame is rotationally connected to the outer wall of the transmission rod; the auxiliary block is a cylindrical structure, a threaded through hole is arranged on the auxiliary block, a circular ring-shaped protrusion is arranged on the outer wall of the auxiliary block, a rectangular protrusion is arranged on the circular ring-shaped protrusion of the auxiliary block, and the adjusting frame is threadedly connected to the middle position of the auxiliary block.

[0013] The lightweight planetary gear box planet carrier structure has the following beneficial effects:

[0014] Compared with the conventional planet carrier, the planet carrier structure according to the embodiments of the present application is provided with multiple upper pressing rings, which are used to tighten the lower two groups of installation cylinders of the butt joint rod and the locking block, so that the planet carrier structure is kept compact and is convenient to disassemble.

[0015] In addition, the two groups of disassembling parts and the central control gear are arranged, which are used to replace each other, so that the normal operation of the generator is maintained, and the idle disassembling part and the hollow gear are maintained.

[0016] In addition, the installation cylinder is provided with a plug-in slot, which is used to disassemble the disassembling block and the external gear, so that the opposite disassembling part and the central control gear are maintained, and the external gear is kept stable under the action of the central control gear and the external transmission structure, so that the gear box is used normally.

[0017] In addition, the adjusting frame is rotationally connected to the transmission rod, which is used to cooperate with the auxiliary block to lower the transmission rod through threads, so that the transmission rod is connected to different groups of central control gears through the adjusting slot, the central control gears are replaced, the idle central control gear and the disassembling block are maintained, and the central control gear is used conveniently. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0019] The drawings described below only relate to some embodiments of the present application, and are not limited to the present application.

[0020] In the drawings:

[0021] Figure 1 A schematic view of a perspective structure according to an embodiment of the present application is shown;

[0022] Figure 2 A schematic view of a perspective bottom structure according to an embodiment of the present application is shown;

[0023] Figure 3 A schematic view of an exploded structure according to an embodiment of the present application is shown;

[0024] Figure 4 A schematic view of an exploded bottom structure according to an embodiment of the present application is shown;

[0025] Figure 5 A schematic view of a partially cut structure according to an embodiment of the present application is shown;

[0026] Figure 6 A schematic view of a detail according to an embodiment of the present application is shown; Figure 5 A schematic view of a detail according to an embodiment of the present application is shown;

[0027] Figure 7 A schematic view of a detail according to an embodiment of the present application is shown; Figure 5 A schematic view of a detail according to an embodiment of the present application is shown;

[0028] Figure 8 A schematic view of a retaining portion assembly structure according to an embodiment of the present application is shown;

[0029] Figure 9 A schematic view of a dismounting portion assembly structure according to an embodiment of the present application is shown;

[0030] Figure 10 A schematic view of an adjustment portion assembly structure according to an embodiment of the present application is shown;

[0031] Figure 11 A schematic view of a dismounting portion and adjustment portion assembly structure according to an embodiment of the present application is shown;

[0032] Figure 12 A schematic view of a detail according to an embodiment of the present application is shown; Figure 11 A schematic view of a detail according to an embodiment of the present application is shown.

[0033] List of reference signs

[0034] 1. holding part; 101, centering ring; 1011, butt joint groove; 102, butt joint rod; 103, upper pressing ring; 104, locking block; 2, easy removal part; 201, mounting cylinder; 202, plug-in groove; 203, mounting groove; 204, dismounting block; 205, external gear; 206, pressing plate; 3, adjusting part; 301, transmission rod; 302, butt joint ring; 303, regulating groove; 304, central control gear; 3041, connecting groove; 305, adjusting frame; 306, auxiliary block. DETAILED DESCRIPTION

[0035] The embodiments of the present application will be further described below in conjunction with the drawings and examples.

[0036] Example 1: Please refer to Figures 1 to 12The application provides a light-weight planetary gear box planet carrier structure, which comprises a holding part 1, a convenient dismounting part 2 and an adjusting part 3, wherein the holding part 1 comprises a middle fixed ring 101 and a butt joint groove 1011; the middle fixed ring 101 adopts a circular ring structure, a circular ring protrusion is arranged on the inner wall of the middle fixed ring 101, and a butt joint groove 1011 in a rectangular structure is arranged on the outer wall of the middle fixed ring 101; the middle fixed ring 101 is used for assisting in mounting and fixing other structures of the device, so that the device is compact and stable; the butt joint groove 1011 arranged on the middle fixed ring 101 is used for conveniently fixing the butt joint rod 102, and then the installation cylinder 201 is fixed by cooperating with the locking block 104; the convenient dismounting part 2 is arranged in the holding part 1, the installation cylinder 201 of the convenient dismounting part 2 is arranged between the middle fixed ring 101 and the upper pressing ring 103 of the holding part 1, the butt joint rod 102 of the holding part 1 is inserted into the insertion groove 202 of the installation cylinder 201, and the locking block 104 of the holding part 1 is inserted into the insertion groove 202; the convenient dismounting part 2 comprises a dismounting block 204; the dismounting block 204 adopts a circular arc block structure, an axial hole is arranged at the middle position of the dismounting block 204, a pull handle is arranged on the outer wall of the dismounting block 204, the dismounting block 204 needs to be used in cooperation with two groups, and the dismounting block 204 is inserted into the installation groove 203; the dismounting block 204 mainly fixes the external gear 205 in a cooperative mode of two groups, so that the external gear 205 is stable and convenient to dismount, and then the external gear 205 is convenient to detect and maintain; the adjusting part 3 is arranged in the convenient dismounting part 2, the transmission rod 301 of the adjusting part 3 is rotationally connected into the pressing plate 206 of the convenient dismounting part 2, the middle control gear 304 of the adjusting part 3 is connected to the external gear 205 of the convenient dismounting part 2 in a clamping tooth mode, the auxiliary block 306 of the adjusting part 3 is fixed on the top of the upper pressing ring 103 through screws, and the adjusting part 3 comprises a butt joint ring 302 and an adjusting groove 303; the butt joint ring 302 is in a circular ring structure, the butt joint ring 302 is fixed outside the transmission rod 301, the adjusting groove 303 in a circular ring through hole is arranged on the butt joint ring 302, and a rectangular protrusion is arranged in the adjusting groove 303; the butt joint ring 302 is used for connecting different groups of middle control gears 304 by cooperating with the adjusting groove 303 when the transmission rod 301 is adjusted, so that different middle control gears 304 are controlled to rotate, the wind driven generator is kept in normal operation, the idle external gear 205 is convenient to dismount and maintain, and the external gear 205 is convenient to use.

[0037] In the embodiment one, Figure 8As shown, the docking rod 102 adopts a hexagonal prism structure, and two groups of bottom surfaces of the docking rod 102 are respectively provided with cylindrical protrusions, and the two groups of cylindrical protrusions of the docking rod 102 are respectively provided with threaded rod-shaped protrusions. The docking rod 102 is used to keep stable by being inserted into the docking groove 1011, so as to facilitate the cooperation of the locking block 104 and the upper compression ring 103 to lock the overall structure of the planet carrier under the action of the thread; the upper compression ring 103 is a circular ring structure, and the upper compression ring 103 is provided with a counterbore, and the upper compression ring 103 is provided with two groups, and the two groups of upper compression rings 103 are respectively arranged on the upper and lower sides of the middle fixed ring 101; the upper compression ring 103 is mainly used to lock the installation cylinder 201 under the tightening of the locking block 104 and the docking rod 102, so as to facilitate the stability of the overall structure of the planet carrier; the locking block 104 is a cylindrical structure, and the locking block 104 is provided with a hexagonal prism groove, and the locking block 104 is provided with a threaded groove, and the locking block 104 is inserted into the upper compression ring 103, and the locking block 104 is connected with the docking rod 102 through the thread; the locking block 104 is used to tighten the docking rod 102 under the action of the thread, so as to facilitate the overall stability of the planet carrier, and the planet carrier is convenient to use.

[0038] As shown, Figure 9 The installation cylinder 201 adopts a cylindrical structure, and two groups of bottom surfaces of the installation cylinder 201 are respectively provided with circular insertion holes, and the installation cylinder 201 is provided with an insertion slot 202 which is a circular through hole structure; the installation cylinder 201 is used to assist in installing other structures of the convenient disassembly part 2, so as to facilitate the insertion processing of the central control gear 304, and then the overall stability of the planet carrier is protected, so as to be convenient to use. By providing the insertion slot 202 on the installation cylinder 201, the insertion processing of the docking rod 102 and the locking block 104 is facilitated, so as to be convenient to use; the installation slot 203 is a rectangular through hole, and the upper and lower ends of the installation slot 203 are respectively connected with circular arc grooves, and the installation slot 203 is arranged on the outer wall of the installation cylinder 201; the installation slot 203 is used to assist in inserting the disassembly block 204 and the external gear 205, so as to facilitate the stability, and then the external gear 205 is assisted to be disassembled through the insertion mode, so as to be convenient to use; the external gear 205 is a cylindrical gear structure, and the external gear 205 is provided with a cylindrical protrusion, and the external gear 205 is rotatably connected between the two groups of disassembly blocks 204; the external gear 205 is used to assist in connecting with the central control gear 304 through the clamping teeth, so as to facilitate the external structure, and then the transmission processing is assisted; the pressing plate 206 is a cylindrical structure, and the outer wall of the pressing plate 206 is provided with a circular protrusion, and the bottom of the circular protrusion of the outer wall of the pressing plate 206 is provided with a cylindrical insertion block, and the inner wall of the pressing plate 206 is provided with a circular protrusion, and the pressing plate 206 is inserted into the installation cylinder 201 through the cylindrical insertion block; the pressing plate 206 is installed between the transmission rod 301 and the installation cylinder 201 through the insertion mode, so as to facilitate the protection of the internal structure, and then the pressing plate 206 is convenient to use.

[0039] As shown in Figure 10 , the transmission rod 301 adopts a cylindrical structure, and a circular protrusion is arranged on the outer wall of the transmission rod 301; the transmission rod 301 is mainly connected with an external control structure, so that it rotates in the rotating process, thereby facilitating the rotation of the central control gear 304, so as to facilitate the transmission treatment of the generator; the adjusting part 3 further comprises: a connecting groove 3041; the central control gear 304 is a cylindrical gear structure, and a cylindrical protrusion is arranged on the central control gear 304; a circular through hole is arranged on the cylindrical protrusion of the central control gear 304, and the central control gear 304 is rotatably connected to the outer wall of the transmission rod 301; the circular through hole of the central control gear 304 is connected with a rectangular groove-shaped connecting groove 3041; the central control gear 304 is used to rotate under the driving of the transmission rod 301, so as to facilitate the rotation of the external gear 205, thereby assisting the transmission treatment of the generator, and at the same time, the central control gear 304 is connected through the connecting groove 3041, thereby facilitating the rotation of the relative central control gear 304 and facilitating its use.

[0040] As shown in Figures 11 to 12 , the adjusting part 3 further comprises: an adjusting frame 305 and an auxiliary block 306; the adjusting frame 305 is a threaded rod structure, and a handle is arranged on the adjusting frame 305; a circular through hole is arranged on the adjusting frame 305, and the adjusting frame 305 is rotatably connected to the outer wall of the transmission rod 301; the adjusting frame 305 mainly drives the transmission rod 301 to adjust the position in the rotating process through the thread, so as to facilitate the rotation of different central control gears 304, thereby facilitating its use; the auxiliary block 306 is a cylindrical structure, and a threaded through hole is arranged on the auxiliary block 306; a circular protrusion is arranged on the outer wall of the auxiliary block 306, and a rectangular protrusion is arranged on the circular protrusion of the auxiliary block 306; the adjusting frame 305 is threadedly connected to the middle position of the auxiliary block 306; the auxiliary block 306 is used to cooperate with the adjusting frame 305 to adjust, so as to facilitate the adjustment of the transmission rod 301, thereby facilitating its control.

[0041] The specific use and role of the embodiment are as follows: in the application, the device is installed in the planetary gear box as a whole, the external gear 205 and the transmission rod 301 are connected with external transmission structure respectively, then the transmission rod 301 is controlled to rotate through the external transmission structure, at the same time, the transmission rod 301 is connected with the upper control gear 304 under the action of the butt joint ring 302 and the control groove 303, so that the upper control gear 304 is driven to rotate in the process of rotation, the external gear 205 is driven to rotate through the clamping tooth in the process of rotation, so as to assist the transmission to the external transmission structure, when the internal structure is overhauled, the rotating adjusting frame 305 is rotated, so that the transmission rod 301 is pushed through the screw under the cooperation of the auxiliary block 306, the butt joint ring 302 and the upper control gear 304 are separated, and the lower control gear 304 is connected in the process of continuous downward movement, so that the internal structure is driven through the lower control gear 304, so as to facilitate the maintenance of the device as a whole in the working state, then the idle external gear 205 is removed from the installation groove 203 under the action of the dismounting block 204, so as to facilitate the maintenance of the external gear 205 through the dismounting mode, after the dismounting block 204 in the installation groove 203 and the external gear 205 are dismounted, the installation groove 203 is convenient for the maintenance of the relative control gear 304, so that the relative control gear 304 is maintained after a long time of use.

Claims

1. A lightweight planetary gearbox planet carrier structure, comprising: A holding portion (1), a convenient disassembly portion (2), and an adjusting portion (3); characterized in that the holding portion (1) comprises: a middle solid ring (101), and a docking groove (1011); the middle solid ring (101) adopts a circular ring structure, an inner wall of the middle solid ring (101) is provided with a circular ring-shaped protrusion, and an outer wall of the middle solid ring (101) is provided with a docking groove (1011) of a rectangular structure; the convenient disassembly portion (2) is arranged inside the holding portion (1), and the convenient disassembly portion (2) The mounting tube (201) is arranged between the fixing ring (101) and the upper pressure ring (103) of the holding part (1), the docking rod (102) of the holding part (1) is inserted into the plug-in groove (202) of the mounting tube (201), and the locking block (104) of the holding part (1) is inserted into the plug-in groove (202). The convenient disassembly part (2) includes: a disassembly block (204); the disassembly block (204) adopts an arc block structure, and the middle position of the disassembly block (204) An axial hole is provided, and a pull handle is provided on the outer wall of the disassembly block (204). The disassembly block (204) requires two sets to be used in conjunction with each other. The disassembly block (204) is inserted into the installation groove (203); the adjustment part (3) is provided inside the convenient disassembly part (2), and the transmission rod (301) of the adjustment part (3) is rotatably connected to the pressure plate (206) of the convenient disassembly part (2). The central control gear (304) of the adjustment part (3) and the external gear (205) of the convenient disassembly part (2) are connected. ) are connected by latching teeth, the auxiliary block (306) of the adjustment part (3) is fixed to the top of the upper pressure ring (103) by screws, and the adjustment part (3) comprises: a docking ring (302) and a regulating groove (303); the docking ring (302) is a circular ring structure, the docking ring (302) is fixed to the outside of the transmission rod (301), and the docking ring (302) is provided with a regulating groove (303) with a circular through hole, and a rectangular protrusion is provided in the regulating groove (303).

2. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The docking rod (102) adopts a hexagonal prism structure, and two groups of bottom surfaces of the docking rod (102) are respectively provided with cylindrical protrusions, and the two groups of cylindrical protrusions of the docking rod (102) are respectively provided with threaded rod-shaped protrusions.

3. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The upper pressure ring (103) is a circular ring structure, and a countersunk hole is provided on the upper pressure ring (103). There are two groups of upper pressure rings (103), and the two groups of upper pressure rings (103) are respectively arranged on the upper and lower sides of the middle solid ring (101); the locking block (104) is a cylindrical structure, and a hexagonal prism-shaped groove is provided on the locking block (104). The locking block (104) is provided with a threaded groove. The locking block (104) is inserted into the upper pressure ring (103), and the locking block (104) is connected to the docking rod (102) through a thread.

4. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The installation tube (201) adopts a cylindrical structure, and two groups of bottom surfaces of the installation tube (201) are respectively provided with circular plug holes, and the installation tube (201) is provided with a plug-in groove (202) with a circular through-hole structure.

5. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The installation groove (203) is a rectangular through hole, and arc-shaped grooves are connected to the upper and lower ends of the installation groove (203) respectively. The installation groove (203) is arranged on the outer wall of the installation cylinder (201).

6. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The external gear (205) is a columnar gear structure, a cylindrical protrusion is provided on the external gear (205), and the external gear (205) is rotatably connected between the two groups of disassembly blocks (204); the pressure plate (206) is a cylindrical tube structure, an annular protrusion is provided on the outer wall of the pressure plate (206), a cylindrical plug is provided at the bottom of the annular protrusion on the outer wall of the pressure plate (206), an annular protrusion is provided on the inner wall of the pressure plate (206), and the pressure plate (206) is plugged into the installation tube (201) through the cylindrical plug.

7. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The transmission rod (301) has a cylindrical structure, and an annular protrusion is provided on the outer wall of the transmission rod (301).

8. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The adjusting portion (3) further comprises: a connecting groove (3041); the central control gear (304) is a columnar gear structure, a cylindrical protrusion is provided on the central control gear (304), a circular through hole is provided on the cylindrical protrusion of the central control gear (304), the central control gear (304) is rotatably connected to the outer wall of the transmission rod (301), and the circular through hole of the central control gear (304) is connected to the connecting groove (3041) in the shape of a rectangular groove.

9. The lightweight planetary gearbox planet carrier structure according to claim 1, characterized in that: The adjusting portion (3) further comprises: an adjusting frame (305) and an auxiliary block (306); the adjusting frame (305) is a threaded rod-shaped structure, a rotating handle is provided on the adjusting frame (305), a circular through hole is provided on the adjusting frame (305), and the adjusting frame (305) is rotatably connected to the outer wall of the transmission rod (301); the auxiliary block (306) is a cylindrical structure, a threaded through hole is provided on the auxiliary block (306), an annular protrusion is provided on the outer wall of the auxiliary block (306), a rectangular protrusion is provided on the annular protrusion of the auxiliary block (306), and the adjusting frame (305) is threadedly connected to the middle position of the auxiliary block (306).

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