Multifunctional fixing device for single-beam depth finder

Abstract

The utility model relates to the technical field of installation and fixation of detecting instruments, and discloses two supporting rods and a connecting assembly, the two supporting rods are connected through the connecting assembly, the side walls of the two supporting rods are sleeved with fixing assemblies in a sliding mode, each fixing assembly comprises a square tube of a necking structure, the square tubes are arranged on the side walls of the supporting rods in a sliding and sleeving mode, and the square tubes are connected with the connecting assembly. A damping sliding block is arranged on the side wall of the supporting rod and abuts against the inner side wall of the square pipe. According to the multifunctional fixing device for the single-beam depth finder, in the using process, the shaft body is driven to rotate through the power assembly, the first annular base and the blade on the first annular base are directly driven to rotate in the shaft body rotating process, the second annular base is driven to rotate through work of the transmission assembly, and the rotating directions of the first annular base and the second annular base are opposite; the blades are matched to crush the aquatic plants entering the cylinder, so that the aquatic plants are prevented from being attached to the probe to influence the detection result.

Description

Technical Field

[0001] The utility model relates to the technical field of installation and fixing of detection instruments, in particular to a multifunctional fixing device for a single-beam depth sounder. Background Art

[0002] Single-beam depth sounder mainly uses sonar to measure the depth of water. During the measurement process, it is usually necessary to fix the single-beam depth sounder on the ship. When the ship moves, the depth of the water is measured in real time. With the help of the positioning system, the overall depth of the water can be measured. Therefore, in the water measurement work, a multifunctional fixing device for single-beam depth sounder is needed.

[0003] In the prior art, when performing detection work, if the probe is covered by water plants or impurities in the water, the data measured by the probe will be inaccurate, resulting in the need to redo the measurement work. In addition, the general fixing device is usually fixed on the side of the ship, and the entire fixing assembly crosses the entire ship to ensure the stable fixation of the single-beam depth sounder. However, this type of fixing device is relatively long, which causes more inconvenience in installation and carrying, resulting in poor portability of the existing fixing device as a whole, which is not conducive to the rapid development of water area measurement work. Utility Model Content

[0004] The utility model aims to solve the problems in the prior art that the fixing device is not portable and affects the normal detection of the probe, and proposes a multifunctional fixing device for a single-beam depth sounder.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A multifunctional fixing device for a single-beam depth sounder comprises two support rods and a connecting assembly, wherein the two support rods are connected by the connecting assembly, and the side walls of the two support rods are both slidably sleeved with a fixing assembly, and the fixing assembly comprises a square tube with a shrinking structure, and the square tube is slidably sleeved on the side walls of the support rods, and the side walls of the support rods are provided with a damping slider, and the damping slider is in contact with the inner wall of the square tube, and the outer wall of each square tube is slidably sleeved with a fixing unit, and handles are provided on the tops of the two square tubes, and an installation assembly is provided at the end of one of the square tubes, and the installation assembly is used to fix the single-beam depth sounder, and the side wall of the installation assembly is provided with an L-shaped plate, and a cylinder is provided at the bottom of the L-shaped plate, and a support frame is provided at the end of the inner wall of the cylinder, and the support The frame side wall is rotatably provided with an axis body, the side wall of the axis body is fixedly provided with a first annular seat, the side wall of the axis body is rotatably sleeved with a second annular seat, the side walls of the first annular seat and the second annular seat are both provided with blades, and the blades on the first annular seat and the second annular seat face opposite directions, the side wall of the axis body is provided with a transmission assembly, the transmission assembly is used to drive the second annular seat to rotate so that the first annular seat and the second annular seat rotate in opposite directions, the side wall of the axis body is provided with a propeller, the inner side wall of the cylinder is provided with a filter screen, the outer side wall of the cylinder is provided with a circular hole near the filter screen, and the circular hole is close to the bottom of the mounting assembly, the outer side wall of the cylinder is penetrated by two output pipes, and the top of the L-shaped plate is provided with a power assembly, and the power assembly is used to drive the axis body to rotate.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, the fixing unit includes a connecting sleeve slidably mounted on the outer wall of the square tube, a notch is provided on the top of the connecting sleeve, and the notch and the handle are matched, a bracket is provided at the bottom of the connecting sleeve, a threaded hole is provided at the bottom of the side wall of the bracket, and also includes a plurality of sockets, and the plurality of sockets are equidistantly arranged on the outer wall of the square tube, and each outer wall of the connecting sleeve is threadedly connected to a fixing bolt, and the fixing bolt and the socket are matched.

[0009] Furthermore, the fixing unit also includes a screw rod, the screw rod is adapted to the threaded hole, a ball head is provided at the end of the screw rod, and a rubber pad is rotatably provided on the outer side wall of the ball head.

[0010] Furthermore, the mounting assembly includes a cylinder body arranged on the side wall of the square tube, a fixing nut is fixed on the top of the inner wall of the cylinder body, and the fixing nut is used to cooperate with the bolt to fix the single-beam depth sounder.

[0011] Furthermore, the connecting assembly includes a first connecting block arranged on the side wall of one of the support rods and a second connecting block arranged on the side wall of the other support rod, and the first connecting block and the second connecting block are rotatably connected, and polygonal holes are opened on the tops of the first connecting block and the second connecting block, and the same limiting assembly is inserted into multiple polygonal holes.

[0012] Furthermore, the limiting component includes a pin inserted into a plurality of polygonal holes, the pin and the polygonal hole are adapted, a connecting plate is provided on the top of the pin, a connecting rope is provided on the top of the connecting plate, and the connecting rope is connected to the second connecting block.

[0013] Furthermore, the power assembly includes a motor arranged on the top of the L-shaped plate, a first transmission wheel is rotatably arranged on the side wall of the cylinder, and the first transmission wheel is fixed to the shaft body, a second transmission wheel is fixed to the output shaft of the motor, and the side walls of the first transmission wheel and the second transmission wheel are sleeved with the same transmission belt

[0014] Furthermore, the transmission assembly includes a second gear arranged on the side wall of the shaft body, a connecting shaft is arranged on the side wall of the support frame, a first gear is rotatably arranged on the end of the connecting shaft, and the first gear and the second gear are meshed with each other, and a gear ring is arranged on the outer side wall of the second annular seat, and the gear ring and the first gear are meshed with each other.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0016] 1. The utility model adopts a shaft, a first annular seat, a second annular seat, a blade, a transmission assembly and a power assembly. During use, the power assembly can be used to drive the shaft to rotate. During the rotation of the shaft, the first annular seat and the blade on the first annular seat are directly driven to rotate. The second annular seat is driven to rotate through the operation of the transmission assembly. The rotation directions of the first annular seat and the second annular seat are opposite. In cooperation with the blade, the aquatic plants entering the cylinder can be crushed, thereby preventing the aquatic plants from adhering to the probe and affecting the detection results.

[0017] 2. The utility model adopts two support rods, two square tubes and a connecting assembly, and realizes the rotation between the two support rods through the connecting assembly, and realizes the telescopic movement between the support rods and the square tube through technical means such as sliding between the square tube and the support rod, so as to adapt to ships of different specifications and facilitate installation. During carrying, the overall volume of the fixing device is reduced by folding the two support rods and contracting the support rods and the square tube. Therefore, the technical problem of being inconvenient to carry in the prior art is effectively solved, and the technical effect of convenient carrying is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the screw rod, ball head and rubber pad of the utility model;

[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the partially enlarged structure at center A;

[0021] Figure 4 This is a schematic diagram showing the overall appearance of the utility model after folding;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of a square tube of the utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the cylinder and the output pipe of the utility model;

[0024] Figure 7 This is a schematic diagram of the cross-sectional structure of the cylinder of the utility model;

[0025] Figure 8 For this utility model Figure 7 Schematic diagram of the local enlarged structure at point B in the middle.

[0026] In the figure: 1. support rod; 2. square tube; 3. socket; 4. connecting sleeve; 5. notch; 6. fixing bolt; 7. bracket; 8. screw rod; 9. rubber pad; 10. cylinder; 11. fixing nut; 12. handle; 13. ball head; 14. first connecting block; 15. second connecting block; 16. latch; 17. connecting rope; 18. damping slider; 19. cylinder; 20. output pipe; 21. motor; 22. transmission belt; 23. round hole; 24. support frame; 25. blade; 26. propeller; 27. filter; 28. first annular seat; 29. ​​second annular seat; 30. gear ring; 31. first gear; 32. second gear; 33. connecting shaft; 34. L-shaped plate; 35. shaft body. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Combination Figure 1-Figure 8As shown, a multifunctional fixing device for a single-beam depth sounder of the utility model comprises two support rods 1 and a connecting assembly, the two support rods 1 are connected by the connecting assembly, the side walls of the two support rods 1 are slidably sleeved with a fixing assembly, the fixing assembly comprises a square tube 2 with a shrinking structure, the square tube 2 is slidably sleeved on the side wall of the support rod 1, the side wall of the support rod 1 is provided with a damping slider 18, and the damping slider 18 is in contact with the inner wall of the square tube 2, the outer wall of each square tube 2 is slidably sleeved with a fixing unit, the top of the two square tubes 2 are provided with a handle 12, one end of one of the square tubes 2 is provided with a mounting assembly, the mounting assembly is used to fix the single-beam depth sounder, the side wall of the mounting assembly is provided with an L-shaped plate 34, the bottom of the L-shaped plate 34 is provided with a cylinder 19, a support frame 24 is provided at the end of the inner wall of the cylinder 19, and the side wall of the support frame 24 is rotatably provided with an axis body 35, a first annular seat 28 is fixedly provided on the side wall of the shaft body 35, a second annular seat 29 is rotatably sleeved on the side wall of the shaft body 35, blades 25 are provided on the side walls of the first annular seat 28 and the second annular seat 29, and the blades 25 on the first annular seat 28 and the second annular seat 29 face opposite directions, a transmission assembly is provided on the side wall of the shaft body 35, the transmission assembly is used to drive the second annular seat 29 to rotate, so that the first annular seat 28 and the second annular seat 29 rotate in opposite directions, a propeller 26 is provided on the side wall of the shaft body 35, a filter screen 27 is provided on the inner side wall of the cylinder 19, a circular hole 23 is opened on the outer side wall of the cylinder 19 near the filter screen 27, and the circular hole 23 is close to the bottom of the mounting assembly, two output pipes 20 are penetrated through the outer side wall of the cylinder 19, and a power assembly is provided on the top of the L-shaped plate 34, and the power assembly is used to drive the shaft body 35 to rotate.

[0029] In a preferred embodiment, the utility model can be further configured as follows: the fixing unit includes a connecting sleeve 4 slidably sleeved on the outer wall of the square tube 2, a notch 5 is provided on the top of the connecting sleeve 4, and the notch 5 is adapted to the handle 12, a bracket 7 is provided at the bottom of the connecting sleeve 4, and a threaded hole is provided at the bottom of the side wall of the bracket 7, such as Figure 1 , Figure 4 As shown: by utilizing the sliding between the connecting sleeve 4 and the square tube 2, the two connecting sleeves 4 on the same square tube 2 can slide independently to adjust the distance between the two connecting sleeves 4, so that the bracket 7 can be located on both sides of the ship's side, and the handle 12 can be prevented from restricting the sliding of the connecting sleeve 4 through the notch 5.

[0030] In a preferred embodiment, the utility model can be further configured as follows: the fixing unit also includes a screw rod 8, the screw rod 8 is adapted to the threaded hole, a ball head 13 is provided at the end of the screw rod 8, and a rubber pad 9 is rotatably provided on the outer wall of the ball head 13, such as Figure 2 Said: by rotating the screw rod 8 and cooperating with the threaded hole, the rubber pad 9 is moved, and by rotating between the ball head 13 and the rubber pad 9, the two rubber pads 9 can fit closely to the inclined side of the ship, thereby ensuring the fixing effect of the device.

[0031] In a preferred embodiment, the utility model can be further configured as follows: the mounting assembly includes a cylinder 10 arranged on the side wall of the square tube 2, and a fixing nut 11 is fixed to the top of the inner wall of the cylinder 10, and the fixing nut 11 is used to cooperate with the bolt to fix the single beam depth sounder, such as Figure 1 As shown: when in use, the single-beam depth sounder is fixed to the top of the cylinder 10 by fixing the nut 11 and the bolt, and the probe of the single-beam depth sounder is fixed to the bottom of the cylinder 10, and the cylinder 10 can store signal lines and other cables to prevent impurities such as water plants from being entangled in signal lines and other cables during the movement of the ship.

[0032] In a preferred embodiment, the utility model can be further configured as follows: the connecting assembly includes a first connecting block 14 arranged on the side wall of one of the support rods 1 and a second connecting block 15 arranged on the side wall of the other support rod 1, and the first connecting block 14 and the second connecting block 15 are rotatably connected, and the tops of the first connecting block 14 and the second connecting block 15 are both provided with polygonal holes, and the same limiting assembly is inserted into the multiple polygonal holes, such as Figure 3 As shown: by rotating the first connecting block 14 and the second connecting block 15, the two supporting rods 1 are folded and unfolded, thereby realizing the folding and unfolding of the fixing device.

[0033] In a preferred embodiment, the utility model can be further configured as follows: the limiting component includes a pin 16 inserted into a plurality of polygonal holes, the pin 16 and the polygonal holes are adapted, a connecting plate is provided on the top of the pin 16, a connecting rope 17 is provided on the top of the connecting plate, and the connecting rope 17 is connected to the second connecting block 15, such as Figure 3 As shown: in the folded state, the rotation between the first connecting block 14 and the second connecting block 15 is limited by the latch 16 and the polygonal hole. At this time, the fixing device can be lifted with the help of the two overlapping handles 12, thereby achieving the portability of the fixing device. The latch 16 is taken out to allow the first connecting block 14 and the second connecting block 15 to rotate, and the fixing device can be unfolded. After unfolding, the latch 16 is inserted into the polygonal hole again, so that the first connecting block 14 and the second connecting block 15 cannot rotate again, thereby avoiding the bending of the fixing device during the water area measurement work, thereby ensuring the normal progress of the measurement work.

[0034] The utility model can be further configured in a preferred embodiment as follows: it also includes a plurality of jacks 3, which are equidistantly arranged on the outer wall of the square tube 2, and each outer wall of the connecting sleeve 4 is threadedly connected with a fixing bolt 6, and the fixing bolt 6 is adapted to the jack 3, such as Figure 1 As shown: the connection sleeve 4 can be fixed by fixing the bolt 6 and the socket 3, thereby determining the distance between the two connection sleeves 4. Thereafter, the screw rod 8 and the threaded hole are used to make the two rubber pads 9 continue to approach each other, thereby achieving the fixation between the device and the side of the ship.

[0035] In a preferred embodiment, the utility model can be further configured as follows: the power assembly includes a motor 21 arranged on the top of the L-shaped plate 34, a first transmission wheel is rotatably arranged on the side wall of the cylinder 19, and the first transmission wheel and the shaft 35 are fixed, a second transmission wheel is fixed to the output shaft of the motor 21, and the side walls of the first transmission wheel and the second transmission wheel are sleeved with the same transmission belt 22, such as Figure 1 and Figure 6 As shown: after the switch of the motor 21 is turned on, the motor 21 works, cooperates with the first transmission wheel, the second transmission wheel and the transmission belt 22, and realizes the rotation of the shaft 35.

[0036] In a preferred embodiment, the utility model can be further configured as follows: the transmission assembly includes a second gear 32 arranged on the side wall of the shaft body 35, a connecting shaft 33 is arranged on the side wall of the support frame 24, a first gear 31 is rotatably arranged on the end of the connecting shaft 33, and the first gear 31 and the second gear 32 are meshed with each other, and a gear ring 30 is arranged on the outer side wall of the second annular seat 29, and the gear ring 30 and the first gear 31 are meshed with each other, such as Figure 8 As shown: during the rotation of the shaft 35, the first annular seat 28 is driven to rotate, and the second gear 32 is driven to rotate at the same time. During the rotation of the second gear 32, the gear ring 30 is rotated through the transmission and reversing of the first gear 31, and the gear ring 30 rotates in the opposite direction to the first annular seat 28. The two sets of blades 25 with opposite directions on the first annular seat 28 and the second annular seat 29 are used to achieve shearing, crush the aquatic plants, prevent the aquatic plants from adhering to the probe, and ensure the detection accuracy.

[0037] The specific working principle of the utility model of a multifunctional fixing device for a single-beam depth sounder is as follows:

[0038] First, when carrying, the two support rods 1 can be folded by rotating the first connecting block 14 and the second connecting block 15. After the two support rods 1 are folded, the latch 16 is inserted into the polygonal hole to avoid the two support rods 1 from unfolding during carrying, which is convenient for carrying;

[0039] Next, the square tube 2 is pushed to make the support rod 1 and the square tube 2 contract. Under the action of the damping slider 18, the support rod 1 is prevented from extending out of the square tube 2 during carrying, thereby ensuring the overall stability of the fixing device in the folded state, thereby ensuring the portability of the fixing device.

[0040] Finally, after the two square tubes 2 are folded, the two handles 12 are combined. At this time, the fixing device can be lifted by the combined handles 12, further ensuring the portability of the fixing device.

[0041] During the detection process, the switch of the motor 21 is turned on, and the motor 21 works, in cooperation with the first transmission wheel, the second transmission wheel and the transmission belt 22, to realize the rotation of the shaft body 35. During the rotation of the shaft body 35, the first annular seat 28 is driven to rotate, and the second gear 32 is driven to rotate at the same time. During the rotation of the second gear 32, the gear ring 30 is rotated through the transmission and reversing of the first gear 31, and the gear ring 30 rotates in the opposite direction to the first annular seat 28, and cooperates with the two sets of blades 25 with opposite directions on the first annular seat 28 and the second annular seat 29 to realize the shearing work, crush the water grass, and prevent the water grass from adhering to the probe, thereby ensuring the detection accuracy. During the rotation of the shaft body 35, the propeller 26 is driven to rotate, so that water is sucked into the cylinder 19, and the crushed water grass is output through the two output pipes 20, so that the crushed water grass is prevented from flowing into the bottom of the probe. After being filtered by the filter 27, the clean water rushes to the probe through the circular hole 23, so that the probe remains clean, and the probe is prevented from being covered by impurities, further ensuring the detection accuracy.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0043] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multifunctional fixing device for a single-beam echo sounder, comprising two support rods (1) and a connecting assembly, characterized in that: The two support rods (1) are connected by a connecting assembly. The side walls of the two support rods (1) are both slidably sleeved with a fixing assembly. The fixing assembly comprises a square tube (2) with a contracted mouth structure. The square tube (2) is slidably sleeved on the side wall of the support rod (1). The side wall of the support rod (1) is provided with a damping slider (18), and the damping slider (18) abuts against the inner side wall of the square tube (2). The outer side wall of each square tube (2) is slidably sleeved with a fixing unit. The tops of the two square tubes (2) are both provided with a handle (12). The end of one of the square tubes (2) is provided with a mounting assembly. The mounting assembly is used to fix a single-beam depth sounder. The side wall of the mounting assembly is provided with an L-shaped plate (34). The bottom of the L-shaped plate (34) is provided with a cylinder (19). The end of the inner side wall of the cylinder (19) is provided with a support frame (24). The side wall of the support frame (24) is rotatably provided with a shaft body (35). The side wall of the shaft body (35) is fixedly provided with a first annular seat. (28), a second annular seat (29) is rotatably sleeved on the side wall of the shaft body (35), blades (25) are provided on the side walls of both the first annular seat (28) and the second annular seat (29), and the blades (25) on the first annular seat (28) and the second annular seat (29) face in opposite directions, a transmission assembly is provided on the side wall of the shaft body (35), and the transmission assembly is used to drive the second annular seat (29) to rotate so that the first annular seat (28) and the second annular seat (29) rotate in opposite directions, a propeller (26) is provided on the side wall of the shaft body (35), a filter screen (27) is provided on the inner side wall of the cylinder (19), a circular hole (23) is provided on the outer side wall of the cylinder (19) near the filter screen (27), and the circular hole (23) is close to the bottom of the mounting assembly, two output pipes (20) are provided through the outer side wall of the cylinder (19), and a power assembly is provided on the top of the L-shaped plate (34), and the power assembly is used to drive the shaft body (35) to rotate.

2. A multifunctional fixing device for a single beam echo sounder according to claim 1, characterized in that: The fixing unit comprises a connecting sleeve (4) which is slidably mounted on the outer wall of the square tube (2); a notch (5) is provided on the top of the connecting sleeve (4), and the notch (5) is adapted to fit the handle (12); a bracket (7) is provided on the bottom of the connecting sleeve (4), and a threaded hole is provided on the bottom of the side wall of the bracket (7).

3. A multifunctional fixing device for a single beam echo sounder according to claim 2, characterized in that: The fixing unit further comprises a screw rod (8), the screw rod (8) being adapted to the threaded hole, a ball head (13) being arranged at the end of the screw rod (8), and a rubber pad (9) being rotatably arranged on the outer side wall of the ball head (13).

4. A multifunctional fixing device for a single beam echo sounder according to claim 1, characterized in that: The mounting assembly comprises a cylinder (10) arranged on the side wall of the square tube (2), a fixing nut (11) being fixed to the top of the inner wall of the cylinder (10), and the fixing nut (11) is used to cooperate with a bolt to fix the single-beam depth sounder.

5. The multifunctional fixing device for a single beam echo sounder according to claim 1, characterized in that: The connection assembly comprises a first connection block (14) arranged on the side wall of one of the support rods (1) and a second connection block (15) arranged on the side wall of the other support rod (1), and the first connection block (14) and the second connection block (15) are rotatably connected, and the first connection block (14) and the second connection block (15) are both provided with polygonal holes at the top, and the same limiting assembly is inserted into a plurality of the polygonal holes.

6. A multifunctional fixing device for a single beam echo sounder according to claim 5, characterized in that: The limiting component comprises a latch (16) inserted into a plurality of polygonal holes, the latch (16) being adapted to fit the polygonal holes, a connecting plate being provided on the top of the latch (16), a connecting rope (17) being provided on the top of the connecting plate, and the connecting rope (17) being connected to the second connecting block (15).

7. A multifunctional fixing device for a single beam echo sounder according to claim 2, characterized in that: It also comprises a plurality of jacks (3), the plurality of jacks (3) being arranged at equal distances on the outer wall of the square tube (2), the outer wall of each connecting sleeve (4) being threadedly connected to a fixing bolt (6), and the fixing bolt (6) and the jack (3) being adapted to fit.

8. The multifunctional fixing device for a single beam echo sounder according to claim 1, characterized in that: The power assembly comprises a motor (21) arranged on the top of the L-shaped plate (34); a first transmission wheel is rotatably arranged on the side wall of the cylinder (19), and the first transmission wheel and the shaft (35) are fixed; a second transmission wheel is fixed to the output shaft of the motor (21); and the side walls of the first transmission wheel and the second transmission wheel are sleeved with the same transmission belt (22).

9. The multifunctional fixing device for a single beam echo sounder according to claim 1, characterized in that: The transmission assembly comprises a second gear (32) arranged on a side wall of the shaft body (35); a connecting shaft (33) is arranged on the side wall of the support frame (24); a first gear (31) is rotatably arranged on the end of the connecting shaft (33); the first gear (31) and the second gear (32) are meshed with each other; a gear ring (30) is arranged on the outer side wall of the second annular seat (29); the gear ring (30) and the first gear (31) are meshed with each other.

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