An aircraft model take-off auxiliary device

Abstract

The present application discloses an auxiliary device for taking off a model airplane, the auxiliary device comprising: a base, a limiting unit, a driving unit, a transmission unit, a traction unit and a traction control unit are arranged on the base, wherein the limiting unit is used to limit the driving unit; the driving unit is used to generate traction force and control the traction unit through the transmission unit to traction the airplane model to assist the airplane model in taking off; the traction control unit is used to control the traction force generated by the driving unit. The present application can traction the airplane model to help the airplane model take off smoothly in a restricted environment.

Description

Technical Field

[0001] The present application belongs to the technical field of aircraft model auxiliary equipment, and specifically relates to an aircraft model take-off auxiliary device. Background Art

[0002] The traditional way of taking off a model aircraft mainly relies on the power system of the model aircraft itself. However, in some restricted environments, such as headwind, the model aircraft often cannot rely on its own power system to provide enough climbing force to overcome air resistance, resulting in an increase in the takeoff distance of the model aircraft or even failure to take off smoothly. Therefore, there is an urgent need for a solution that can assist the model aircraft to take off smoothly in restricted environments. Summary of the invention

[0003] The main purpose of the present application is to provide an aircraft model take-off auxiliary device, which aims to solve the problem that existing aircraft models are difficult to take off smoothly relying on their own power systems in restricted environments.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A model airplane takeoff assisting device, the assisting device comprising: a base, on which a limiting unit, a driving unit, a transmission unit, a traction unit and a traction control unit are arranged, wherein the limiting unit is used to limit the driving unit; the driving unit is used to generate traction force and control the traction unit through the transmission unit to traction the model airplane to assist the model airplane takeoff; the traction control unit is used to control the traction force generated by the driving unit.

[0006] Optionally, the limiting unit includes: an energy storage screw, one end of the energy storage screw is fixed to the base, a sliding block is sleeved on the energy storage screw, the sliding block is fixedly connected to the driving unit, a locking motor is provided on one side of the sliding block, the locking motor is connected to a clamping block, and the clamping block is clamped with the driving unit; a support frame is provided at the other end of the energy storage screw, a reduction motor is provided on the support frame, and the reduction motor is connected to the energy storage screw via a coupling.

[0007] Optionally, the driving unit includes: a first mounting frame and a second mounting frame, the first mounting frame and the second mounting frame are relatively arranged on both sides of the base along the length direction, and a sliding frame is slidably connected between the first mounting frame and the second mounting frame; a transverse guide rail is provided on the sliding frame, and a transverse slider is provided on the transverse guide rail, and the transverse slider slides along the transverse guide rail between the first mounting frame and the second mounting frame.

[0008] Optionally, the transmission unit includes: a movable pulley guide rail, the movable pulley guide rail is fixed on the base, a movable pulley is slidably connected to the movable pulley guide rail, a clamping member is provided on a side of the movable pulley facing the sliding frame, and the clamping member is clamped on the sliding frame.

[0009] Optionally, the traction control unit includes: a third mounting frame, the third mounting frame is arranged on the base and close to the first mounting frame, a driving frame is arranged on the third mounting frame, and the outer wall of the driving frame close to the sliding frame is connected to the transverse slider; a parabolic guide rail is arranged between the driving frame and the base, a rotating guide block is sleeved on the parabolic guide rail, and the rotating guide block is fixed to the inner wall of the driving frame through a second connecting shaft.

[0010] Optionally, the traction control unit further includes: a counterweight block, wherein the counterweight block is arranged at the bottom end of the driving frame to maintain the balance of the driving frame.

[0011] Optionally, the traction unit includes: a runway board, the runway board is arranged on the second mounting frame, a slide groove is arranged on the runway board along the traction direction of the aircraft model, and a traction hook is arranged in the slide groove.

[0012] Optionally, a limit block is provided at the bottom end of the runway board away from the base, a reset guide rail is provided between the limit block and the base, a reset slider is sleeved on the reset guide rail, and a traction rope is provided between the reset slider and the traction hook and the movable pulley.

[0013] Optionally, the traction unit also includes: a guide pulley assembly, the guide pulley assembly including a first guide pulley, a second guide pulley, a third guide pulley and a fourth guide pulley, wherein the first guide pulley and the second guide pulley are fixedly connected to a mounting block integrally connected to the movable pulley guide rail via a first connecting shaft, the third guide pulley is arranged at the bottom end of the runway board close to the first guide pulley and the second guide pulley, and the fourth guide pulley is fixed to the bottom end of the runway board away from the first guide pulley and the second guide pulley via a fixing member.

[0014] Optionally, the third guide pulley and the fourth guide pulley are located on the same straight line as the slide groove, and the first guide pulley, the second guide pulley, the third guide pulley and the fourth guide pulley are connected by the traction rope.

[0015] Compared with the prior art, this application can bring the following beneficial effects:

[0016] The present application can provide a stable traction force to assist the take-off of the aircraft model, thereby helping the aircraft model to shorten the take-off run distance. In addition, the present application can control the change of the traction force, making the traction force more gradual and stable, thereby reducing the impact on the structure of the aircraft model. The present application can ensure the safety and take-off efficiency of the aircraft model under different take-off conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a left view of an aircraft model take-off auxiliary device provided by one embodiment of the present application;

[0018] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the left view shown;

[0019] Figure 3 It is a schematic diagram of a limit block and a locking motor of an aircraft model takeoff auxiliary device provided by an embodiment of the present application;

[0020] Figure 4 It is a partially enlarged schematic diagram of a pulley assembly of an aircraft model takeoff auxiliary device provided by one embodiment of the present application;

[0021] Figure 5 It is a right side view of an aircraft model take-off auxiliary device provided by another embodiment of the present application;

[0022] Figure 6 It is a left bottom view of an aircraft model takeoff auxiliary device provided by another embodiment of the present application;

[0023] Figure 7 It is a right bottom view of an aircraft model takeoff auxiliary device provided in another embodiment of the present application.

[0024] The following are the descriptions of the reference numerals:

[0025] 1. Base; 2. First mounting frame; 3. Second mounting frame; 4. Energy storage screw; 5. Moving pulley guide rail; 6. Sliding frame; 6-1. Sliding frame body; 6-2. First sliding connection part; 6-3. Second sliding connection part; 7. Transverse guide rail; 8. Transverse slide block; 9. Support frame; 10. Speed ​​reduction motor; 11. Sliding block; 12. Locking motor; 13. Limiting block; 14. Moving pulley; 15. First guide pulley; 16. Second guide pulley Wheel; 17, mounting block; 18, clamping member; 19, first connecting shaft; 20, third mounting frame; 21, driving frame; 22, rotating guide block; 23, second connecting shaft; 24, parabolic guide rail; 25, counterweight block; 26, runway board; 27, slide groove; 28, traction hook; 29, limit block; 30, fourth guide pulley; 31, fixing member; 32, reset guide rail; 33, reset slider; 34, third guide pulley; 35, traction rope. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] Figure 1 FIG. 1 is a left side view of an aircraft model takeoff auxiliary device according to an embodiment of the present application, as shown in FIG. Figure 1 As shown, the auxiliary device includes:

[0031] The base 1 is a rectangular parallelepiped, and a limiting unit, a driving unit, a transmission unit, a traction unit and a traction control unit are arranged on the base 1, wherein the limiting unit is used to limit the driving unit; the driving unit is used to generate traction and control the traction unit through the transmission unit to pull the aircraft model to assist the aircraft model to take off; the traction control unit is used to control the traction force generated by the driving unit.

[0032] The present application can provide external traction to the aircraft model to help the aircraft model reach the initial speed required for takeoff within a shorter distance, thereby reducing the required taxiing distance of the aircraft model and shortening the take-off time of the aircraft model; in addition, since the additional traction is provided, the success rate of a smooth take-off of the aircraft model can be improved even under adverse factors such as headwind or when the aircraft model itself is insufficiently powered.

[0033] In another exemplary embodiment, Figure 1 and Figure 2 As shown, the limiting unit includes an energy storage screw 4, one end of which is fixed on the base 1, a sliding block 11 is sleeved on the energy storage screw 4, the sliding block 11 is fixedly connected to the driving unit, a locking motor 12 is arranged on one side of the sliding block 11, the locking motor 12 is connected to a clamping block 13, and the clamping block 13 is clamped with the driving unit; a support frame 9 is arranged on the other end of the energy storage screw 4, a reduction motor 10 is arranged on the support frame 9, and the reduction motor 10 is connected to the energy storage screw 4 through a coupling (not shown in the figure).

[0034] In this embodiment, when the auxiliary device is in a stationary or standby state, Figure 3 As shown, the block 13 is engaged with the drive unit to limit the drive unit to prevent the drive unit from sliding downward by itself due to gravity or accidental reasons. When it is necessary to assist the aircraft model to take off, the locking motor 12 drives the block 13 to rotate relative to the drive unit, thereby releasing the engagement between the block 13 and the drive unit. When the block 13 is released from the engagement with the drive unit, the reduction motor 10 starts and controls the energy storage screw 4 to rotate in a first direction (the first direction is, for example, clockwise), thereby driving the sliding block 11 to move linearly downward, and then driving the drive unit to slide downward.

[0035] The limiting unit described in this embodiment can limit the driving unit when the auxiliary device does not need to assist the aircraft model in taking off, thereby avoiding its unnecessary movement, and can quickly and safely release the driving unit and assist the aircraft model in taking off when needed.

[0036] In another exemplary embodiment, please continue to refer to Figure 1 and Figure 2 The driving unit includes a first mounting frame 2 and a second mounting frame 3, wherein the first mounting frame 2 and the second mounting frame 3 are relatively arranged on both sides of the base 1 along the length direction (such as Figure 1 As shown, 1 is the length direction of the base 1), a sliding frame 6 is slidably connected between the first mounting frame 2 and the second mounting frame 3; a transverse guide rail 7 is provided on the sliding frame 6, and a transverse slider 8 is provided on the transverse guide rail 7. The transverse slider 8 slides along the transverse guide rail 7 between the first mounting frame 2 and the second mounting frame 3.

[0037] In this embodiment, the sliding frame 6 includes a sliding frame body 6-1, the sliding frame body 6-1 is fixedly connected to the sliding block 11, and the clamping block 13 is located below the sliding frame body 6-1 and clamped with the sliding frame body 6-1 to limit the sliding frame body 6-1 so that the sliding frame body 6-1 is locked. The two ends of the sliding frame body 6-1 are integrally connected with a first sliding connection part 6-2 and a second sliding connection part 6-3, wherein the first sliding connection part 6-2 is provided with a first sliding groove, and the first sliding connection part 6-2 is slidably connected to the first mounting frame 2 through the first sliding groove, and the second sliding connection part 6-3 is provided with a second sliding groove, and the second sliding connection part 6-3 is slidably connected to the second mounting frame 6-3 through the second sliding groove.

[0038] When the aircraft model needs to be towed, the locking motor 12 drives the block 13 to rotate, so that the block 13 and the sliding frame body 6-1 are released from the clamping state, thereby releasing the sliding frame 6. At the same time, the reduction motor 10 controls the energy storage screw 4 to rotate in a first direction (the first direction is, for example, clockwise), thereby driving the sliding block 11 to move linearly downward along the thread of the energy storage screw 4. Since the sliding block 11 is fixedly connected to the sliding frame 6, the sliding frame 6 will also slide downward along the first support frame 2 and the second support frame 3 as the sliding block 11 moves downward.

[0039] In another exemplary embodiment, Figure 1 and Figure 2 As shown, the transmission unit includes a movable pulley guide rail 5, the movable pulley guide rail 5 is fixed on the base 1, a movable pulley 14 is slidably connected to the movable pulley guide rail 5, and a clamping member 17 is provided on the side of the movable pulley 14 facing the sliding frame 6, and the clamping member 17 is clamped on the sliding frame 6.

[0040] In this embodiment, since the movable pulley 14 is connected to the sliding frame 6 through the clamping member 17, when the sliding frame 6 slides downward along the first mounting frame 2 and the second mounting frame 3, a downward force is applied to the movable pulley 14, so that the movable pulley 14 slides downward synchronously along the movable pulley guide rail 5, thereby triggering the traction unit to tow the aircraft model.

[0041] In another exemplary embodiment, Figure 5 As shown, the traction control unit includes a third mounting frame 20, and the third mounting frame 20 is arranged on the base 1 and close to the first mounting frame 2. A driving frame 21 is arranged on the third mounting frame 20, and the outer wall of the driving frame 21 close to the sliding frame 6 is connected to the transverse sliding slider 8; a parabolic guide rail 24 is arranged between the driving frame 21 and the base 1, and a rotating guide block 22 is sleeved on the parabolic guide rail 24, and the rotating guide block 22 is fixed to the inner wall of the driving frame 21 through a second connecting shaft 23, and the rotating guide block 22 slides along the parabolic guide rail 24.

[0042] In this embodiment, since the driving frame 21 is fixedly connected to the transverse sliding block 8, when the transverse sliding block 8 moves downward with the sliding frame 6, it will also drive the driving frame 21 to move downward. However, due to the presence of the parabolic guide rail 24, the driving frame 21 will perform parabolic motion along the parabolic guide rail 24 under the guidance of the rotating guide block 22 together with the rotating guide block 22. It should be noted that the parabolic trajectory is a smooth curve. Compared with linear motion, parabolic motion can more naturally disperse the traction generated by the driving unit, so that the change of the traction applied by the driving unit to the aircraft model is more gradual and stable. In addition, when the driving frame 21 performs parabolic motion under the guidance of the rotating guide block 22, the driving frame 21 will generate a reverse force from the first support frame 2 to the second support frame 3, and the force will be fed back to the transverse slider 8, so that the transverse slider 8 can slide smoothly along the transverse guide rail 7 from the first support frame 2 to the second support frame 3 in a straight line, thereby ensuring the stability and controllability of the entire traction process.

[0043] The traction control unit provided in the present application can better control the traction force generated by the drive unit through precise parabolic trajectory control, so as to avoid the influence of instantaneous large impact force on the structure of the aircraft model, so that the aircraft model can obtain a more stable and controllable traction assistance during takeoff, thereby improving the safety and reliability of the aircraft model's takeoff process.

[0044] In another exemplary embodiment, please continue to refer to Figure 5 The traction control unit further includes a counterweight block 25 , and the counterweight block 25 is disposed at the bottom end of the driving frame 21 .

[0045] In this embodiment, the counterweight 25 can help maintain the balance of the drive frame 21. Specifically, the process of the drive frame 21 moving downward may cause imbalance, for example, the drive frame 21 may shake or be unstable when moving at high speed. In order to ensure the stability of the drive frame 21 during movement and reduce shaking or other unstable phenomena caused by uneven weight distribution, the counterweight 25 is used to adjust the center of gravity of the entire system so that the movement of the drive frame 21 is more stable and controllable. By providing the counterweight 25, the operating accuracy and reliability of the entire take-off auxiliary device can be improved, ensuring that the safe take-off of the aircraft model will not be affected by the instability of the drive frame 21 itself during the towing of the aircraft model.

[0046] In another exemplary embodiment, Figure 1 , Figure 6 and Figure 7As shown, the traction unit includes a runway plate 26, which is arranged on the second mounting frame 3, and a slide groove 27 is arranged on the runway plate 26 along the traction direction of the aircraft model, and a traction hook 28 is arranged in the slide groove 27; a limit block 29 is arranged at the bottom end of the runway plate 26 away from the base 1, and a reset guide rail 32 is arranged between the limit block 29 and the base 1, and a reset slider 33 is sleeved on the reset guide rail 32, and a traction rope 35 is arranged between the reset slider 33 and the traction hook 28 and the movable pulley 14; the traction unit also includes a guide pulley assembly, and the guide pulley assembly includes a first guide pulley 15, a second guide pulley 16, a third guide pulley 34 and a fourth guide pulley 30, wherein, as shown Figure 2 and Figure 4 As shown, the first guide pulley 15 and the second guide pulley 16 are fixedly connected to the mounting block 17 integrally connected to the movable pulley guide rail 5 through the first connecting shaft 19, the third guide pulley 34 is arranged at the bottom end of the runway board 26 close to the first guide pulley 15 and the second guide pulley 16, the fourth guide pulley 30 is fixed to the bottom end of the runway board 26 away from the first guide pulley 15 and the second guide pulley 16 through the fixing member 31, the third guide pulley 34 and the fourth guide pulley 30 are located on the same straight line as the slide groove 27, and the first guide pulley 15, the second guide pulley 16, the third guide pulley 34 and the fourth guide pulley 30 are connected by the traction rope 35.

[0047] In this embodiment, when the movable pulley 14 slides downward along the movable pulley rail 5 driven by the sliding frame 6, the movable pulley 14 will pull the traction rope 35, and guide the traction rope 35 through the first guide pulley 15 and the second guide pulley 16. By providing the first guide pulley 15 and the second guide pulley 16, on the one hand, it can be ensured that the traction rope 35 moves along the expected path without deviation, and on the other hand, it can be ensured that the traction rope 35 will not be damaged due to excessive bending or friction during the tightening process, and it can also ensure that the traction rope 35 can smoothly transmit the traction force to the traction hook 28. After passing through the first guide pulley 15 and the second guide pulley 16, the traction rope 35 finally reaches the traction hook 28 through the third guide pulley 34. During the traction process, the traction rope 35 moves toward the third guide pulley 34, thereby pulling the traction hook 28 to move along the slide groove 27 toward the direction of the third guide pulley 34. During the sliding process of the traction hook 28 in the slide groove 27, the aircraft model can be towed by the hook installed on the fuselage of the aircraft model. As the traction hook 28 continues to slide in the slide groove 27, the aircraft model will be accelerated by the pulling force from the traction rope 35. At the same time, during the movement of the traction rope 35 toward the third guide pulley 34, the reset slider 33 will slide along the reset slide rail 32 toward the direction of the fourth sliding wheel 30. When the reset slider 33 contacts the limit block 29, the traction rope 35 reaches the maximum moving distance. Here, the aircraft model obtains a certain initial speed. At the same time, the hook on the aircraft model is separated from the traction hook 28, and the aircraft model continues to rely on its own power to complete takeoff.

[0048] When the auxiliary device needs to be reset, the reduction motor 10 drives the energy storage screw 4 to rotate in the second direction (the second direction is, for example, counterclockwise), thereby driving the sliding block 11 to move linearly upward along the thread on the energy storage screw 4. At the same time, the sliding block 11 drives the sliding frame 6 to slide upward along the first support frame 2 and the second support frame 3. When the sliding frame 6 slides upward to the original position, the clamping block 13 forms a clamping connection with the sliding frame 6 again under the action of the locking motor 12, thereby re-limiting the sliding frame 6. In addition, in the process of the sliding frame 6 sliding upward to return to the original position, the sliding frame 6 drives the movable pulley 14 to slide upward along the movable pulley rail 5 through the clamping member 18 and return to the original position. Further, in the process of the sliding frame 6 returning to the original position, the reset slider 33 slides along the reset guide rail 32 toward the base 1 under the action of gravity until it returns to the initial position, thereby causing the traction rope 35 to move in the direction of the fourth guide slider 10 and wait for the next aircraft model take-off assistance.

[0049] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An aircraft model take-off auxiliary device, characterized in that: The auxiliary device comprises: A base (1), wherein a limiting unit, a driving unit, a transmission unit, a traction unit and a traction control unit are arranged on the base (1), wherein: The limiting unit is used to limit the driving unit; The driving unit is used to generate traction and control the traction unit through the transmission unit to pull the aircraft model to assist the aircraft model in taking off; The traction control unit is used to control the traction force generated by the driving unit.

2. The take-off assist device according to claim 1, characterized in that: The limiting unit comprises: An energy storage screw (4), one end of the energy storage screw (4) is fixed on the base (1), a sliding block (11) is sleeved on the energy storage screw (4), the sliding block (11) is fixedly connected to the driving unit, a locking motor (12) is provided on one side of the sliding block (11), the locking motor (12) is connected to a clamping block (13), and the clamping block (13) is clamped to the driving unit; A support frame (9) is provided at the other end of the energy storage screw (4), a reduction motor (10) is provided on the support frame (9), and the reduction motor (10) is connected to the energy storage screw (4) via a coupling.

3. The auxiliary device according to claim 1, characterized in that The driving unit comprises: A first mounting frame (2) and a second mounting frame (3), wherein the first mounting frame (2) and the second mounting frame (3) are arranged opposite to each other on two sides of the base (1) along the length direction, and a sliding frame (6) is slidably connected between the first mounting frame (2) and the second mounting frame (3); The sliding frame (6) is provided with a transverse guide rail (7), and the transverse guide rail (7) is provided with a transverse slider (8), and the transverse slider (8) slides along the transverse guide rail (7) between the first mounting frame (2) and the second mounting frame (3).

4. The auxiliary device according to claim 1, characterized in that The transmission unit comprises: A movable pulley guide rail (5), the movable pulley guide rail (5) is fixed on the base (1), a movable pulley (14) is slidably connected to the movable pulley guide rail (5), a clamping member (17) is provided on the side of the movable pulley (14) facing the sliding frame (6), and the clamping member (17) is clamped on the sliding frame (6).

5. The auxiliary device according to claim 3, characterized in that: The traction control unit comprises: a third mounting frame (20), the third mounting frame (20) being arranged on the base (1) and close to the first mounting frame (2), a driving frame (21) being arranged on the third mounting frame (20), and an outer wall of the driving frame (21) close to a side of the sliding frame (6) being connected to the transverse sliding block (8); A parabolic guide rail (24) is provided between the driving frame (21) and the base (1), a rotating guide block (22) is sleeved on the parabolic guide rail (24), and the rotating guide block (22) is fixed to the inner wall of the driving frame (21) via a second connecting shaft (23).

6. The auxiliary device according to claim 5, characterized in that The traction control unit further comprises: A counterweight block (25) is arranged at the bottom end of the driving frame (21) to maintain the balance of the driving frame (21).

7. The auxiliary device according to claim 3, characterized in that The traction unit comprises: A runway plate (26), the runway plate (26) being arranged on the second mounting frame (3), a slide groove (27) being arranged on the runway plate (26) along the direction in which the aircraft model is towed, and a towing hook (28) being arranged in the slide groove (27).

8. The auxiliary device according to claim 7, characterized in that A limit block (29) is arranged at the bottom end of the runway plate (26) away from the base (1), a reset guide rail (32) is arranged between the limit block (29) and the base (1), a reset slider (33) is sleeved on the reset guide rail (32), and a traction rope (35) is arranged between the reset slider (33), the traction hook (28) and the movable pulley (14).

9. The auxiliary device according to claim 7 or 8, characterized in that The traction unit also includes: A guide pulley assembly, the guide pulley assembly comprising a first guide pulley (15), a second guide pulley (16), a third guide pulley (34) and a fourth guide pulley (30), wherein the first guide pulley (15) and the second guide pulley (16) are fixedly connected to a mounting block (17) integrally connected to the movable pulley guide rail (5) via a first connecting shaft (19), the third guide pulley (34) is arranged at the bottom end of the runway plate (26) close to the first guide pulley (15) and the second guide pulley (16), and the fourth guide pulley (30) is fixed to the bottom end of the runway plate (26) away from the first guide pulley (15) and the second guide pulley (16) via a fixing member (31).

10. The auxiliary device according to claim 9, characterized in that The third guide pulley (34) and the fourth guide pulley (30) are located on the same straight line as the slide groove (27), and the first guide pulley (15), the second guide pulley (16), the third guide pulley (34) and the fourth guide pulley (30) are connected by the traction rope (35).

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