A lifting mechanism for auxiliary installation of the side wall of the boundary layer of a wind tunnel and its usage method

Abstract

A lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer and its usage method, belonging to the field of lifting equipment. It includes a hoisting device and two bases; each of the bases includes a supporting device and a direction fine-tuning device; the upper end of the direction fine-tuning device is provided with a supporting device; the top end of the supporting device is fixedly connected with a hoisting device; the hoisting device is arranged between the two bases; a plurality of auxiliary supporting devices are arranged on the supporting device. The present invention can not only perform fine adjustment of the workpiece in the vertical and horizontal directions, facilitating the movement of the workpiece to the construction position, but also the present invention is provided with a plurality of auxiliary supporting devices to provide support for the device, avoiding the center of gravity from shifting after the workpiece moves to a higher position and causing the device to shake.

Description

Technical Field

[0001] The present invention relates to a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer and its usage method, belonging to the field of lifting equipment. Background Art

[0002] A wind tunnel, that is, a wind tunnel laboratory, is a pipe-shaped experimental device that artificially generates and controls air flow to simulate the air flow around an aircraft or an entity, and can measure the effect of the air flow on the entity and observe physical phenomena. It is one of the most commonly used and effective tools for conducting aerodynamic experiments. Wind tunnel experiments are an essential part of the development work of aircraft.

[0003] When installing a wind tunnel, auxiliary lifting equipment is required. Since it is installed indoors, large lifting equipment is difficult to enter the site. Although the currently used small equipment has the function of lifting workpieces, it cannot move the workpiece to the installation position by finely adjusting the position in the horizontal direction, thus reducing work efficiency. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems in the background art, and provide a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer and its usage method.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer includes a lifting device and two bases; each of the bases includes a supporting device and a direction fine-tuning device; the upper end of the direction fine-tuning device is provided with a supporting device; the top end of the supporting device is fixedly connected with the lifting device; the lifting device is arranged between the two bases; and a plurality of auxiliary supporting devices are arranged on the supporting device.

[0007] A usage method of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer, the usage method includes the following steps:

[0008] Step 1: Connect the workpiece to the lifting device through strap Ⅰ, and then tie strap Ⅱ to strap Ⅰ.

[0009] Step 2: Start the hydraulic cylinder to drive the top plate and then drive the workpiece to move upward.

[0010] Step 3: Start motor Ⅰ to finely adjust the workpiece in the vertical direction.

[0011] Step 4: Push the sleeve with a tool to drive the ring to rotate, and then start motor Ⅱ to push the connecting rod to move on the horizontal plane, and further drive the lifting device to move on the horizontal plane through the hydraulic cylinder.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention can not only finely adjust the workpiece in the vertical and horizontal directions, facilitating the movement of the workpiece to the construction position, but also is provided with a plurality of auxiliary support devices to support the device, avoiding the center of gravity from shifting and the device from shaking after the workpiece is moved to a higher position. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0014] Figure 2 is the front view of a lifting device of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0015] Figure 3 is the front view of a base of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0016] Figure 4 is the front view of a support device of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0017] Figure 5 is the schematic connection structure diagram of a circular rod I, a circular rod II and a connecting cylinder of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0018] Figure 6 is the schematic diagram of a sliding rod structure of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0019] Figure 7 is the schematic position structure diagram of a connecting rod and an inclined rod of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0020] Figure 8 is the front view of a direction fine-tuning device of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0021] Figure 9 is the top view of the positional relationship between a connecting rod and a ring of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention;

[0022] Figure 10 is the side view of the positional relationship between a connecting rod and a ring of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0024] Specific Embodiment 1: As Figures 1-10 shown, this embodiment records a lifting mechanism for auxiliary installation of the side wall of the wind tunnel boundary layer, including a hoisting device 1 and two bases 2; each of the bases 2 includes a support device 21 and a direction fine-tuning device 22; the upper end of the direction fine-tuning device 22 is provided with a support device 21; the top end of the support device 21 is fixedly connected to the hoisting device 1; the hoisting device 1 is arranged between the two bases 2; a plurality of auxiliary support devices are provided on the support device 21.

[0025] Specific Embodiment 2: As Figures 1-10 shown, this embodiment is a further description of Specific Embodiment 1. The hoisting device 1 includes a top plate 11, a connecting rope 12, and a strap I 13; the center of the bottom end of the top plate 11 is fixedly connected to the connecting rope 12, and the other end of the connecting rope 12 is fixedly connected to the strap I 13.

[0026] Specific Embodiment 3: As Figures 1-10As shown in the figure, this embodiment is a further description of the first specific embodiment. The direction fine-tuning device 22 includes a bottom plate 221, a circular ring 222, a support plate 223, a support rod 224, a limit ring 226, a transmission circular ring 227, a motor I 228, a transmission gear 229, a connecting rod 2210, a screw rod 2211, a sleeve 2213, a motor II 2214, and a collar 2215. The circular ring 222 is sleeved on the upper end of the bottom plate 221 through a bearing, and a support plate 223 is placed on the upper end of the circular ring 222. The upper end of the support plate 223 is sleeved with a transmission circular ring 227 through a bearing, and a support rod 224 is also fixedly connected to the upper end of the support plate 223. The upper end of the support rod 224 is fixedly connected with a limit ring 226, and an annular groove is provided on the outer circumferential surface of the limit ring 226. A tooth groove is provided on the outer circumferential surface of the transmission circular ring 227, and a thread is provided on the inner circumferential surface of the transmission circular ring 227. The motor I 228 is fixedly connected to the lower end of the limit ring 226, and a transmission gear 229 is fixedly connected to the output shaft of the motor I 228. The transmission gear 229 meshes with the tooth groove on the outer circumferential surface of the transmission circular ring 227. The lower end of the support plate 223 is fixedly connected with a connecting rod 2210, and the diameter of the connecting rod 2210 is smaller than the inner diameter of the circular ring 222. The collar 2215 is sleeved on the outer circumferential surface of the connecting rod 2210 through a bearing. A through hole is provided on the circular surface of the circular ring 222. One end of the screw rod 2211 is fixedly connected to the outer circumferential surface of the collar 2215, and the other end of the screw rod 2211 passes through the through hole and is threadedly connected to the sleeve 2213. The motor II 2214 is fixedly connected to the outer circumferential surface of the circular ring 222 through a bracket, and the output shaft of the motor II 2214 is fixedly connected to the sleeve 2213.

[0027] Specific Embodiment Four: As Figures 1-10 shown, this embodiment is a further description of the first specific embodiment. The maximum distance between the outer circumferential surface of the connecting rod 2210 and the inner wall of the circular ring 222 is less than or equal to one-fifth of the radius of the support plate 223.

[0028] Specific Embodiment Five: As Figures 1-10 shown, this embodiment is a further description of the first specific embodiment. The support device 21 includes a hydraulic cylinder 211. A circular plate 212 coaxial with the hydraulic cylinder 211 is fixedly connected to the side surface of the movable end of the hydraulic cylinder 211. A circular groove with a T-shaped cross-section is provided at the lower end of the circular plate 212. A thread adapted to the inner circumferential surface of the transmission circular ring 227 is provided at the fixed end of the hydraulic cylinder 211. The plurality of auxiliary support devices are slidably engaged with the circular groove, so that each auxiliary support device can rotate around the hydraulic cylinder 211. The hydraulic cylinder 211 is slidably engaged with the inner hole of the limit ring 226.

[0029] Specific Embodiment Six: As Figures 1-10As shown in the figure, this embodiment is a further description of the first specific embodiment. Each of the auxiliary support devices includes a connecting rod 215, a round rod I 219, a connecting cylinder 2110, a round rod II 2111, a transmission wheel 2112, a support block 2113, and a slider I 2115. A slider I 2115 is fixedly connected to the side surface of the connecting rod 215. The slider I 2115 is in sliding fit with the annular groove 225. The lower end of the connecting rod 215 is fixedly connected to a support block 2113. A transmission wheel 2112 is connected to the side surface of the support block 2113 through a rotating shaft. A round rod I 219 is fixedly connected to the side surface of the transmission wheel 2112. Threads are provided on the entire outer cylindrical surface of the round rod I 219. Threads are provided at both the top end and the bottom end of the inner cylindrical surface of the connecting cylinder 2110. The threads at the top end of the inner cylindrical surface of the connecting cylinder 2110 are adapted to the threads on the outer cylindrical surface of the round rod I 219. Threads are provided at the top end of the outer cylindrical surface of the round rod II 2111. The threads at the top end of the outer cylindrical surface of the round rod II 2111 are adapted to the threads at the bottom end of the inner wall of the connecting cylinder 2110.

[0030] Specific embodiment seven: As Figures 1-10 shown in the figure, this embodiment is a further description of the first specific embodiment. Each of the auxiliary support devices further includes a sliding rod 214, a spring 216, a pushing block 217, an inclined rod 218, a rack 2114, a slider II 2117, and a limiting rod 2118. The connecting rod 215 is L-shaped. A slider II 2117 is fixedly connected to the side surface of the horizontal end of the connecting rod 215. The top end of the sliding rod 214 is in sliding fit with the circular groove. A sliding groove 2116 for sliding fit with the slider II 2117 is provided on the side surface of the sliding rod 214. A pushing block 217 is fixedly connected to the bottom end of the side surface of the sliding rod 214. The limiting rod 2118 is fixedly connected to the side surface of the vertical end of the connecting rod 215. A rectangular groove for sliding fit with the limiting rod 2118 is provided on the inclined rod 218. The inclined rod 218 is obliquely arranged below the horizontal end of the connecting rod 215. The inclined rod 218 is also in contact with the pushing block 217. One end of the spring 216 is fixedly connected to the side surface of the vertical end of the connecting rod 215. The other end of the spring 216 is fixedly connected to the inclined rod 218. A rack 2114 is further fixedly connected to the lower end of the inclined rod 218. A groove adapted to the rack 2114 is provided on the outer cylindrical surface of the transmission wheel 2112.

[0031] Specific embodiment eight: As Figures 1-10 shown in the figure, this embodiment is a further description of the first specific embodiment. The support device 21 further includes a strap II 213. One end of the strap II 213 is fixedly connected to the side surface of the round plate 212. The other end of the strap II 213 is tied to the strap I 13.

[0032] Specific embodiment nine: As Figures 1-10As shown in the figure, this embodiment describes a method for using a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer. The method includes the following steps:

[0033] Step 1: Connect the workpiece to the hoisting device 1 through the strap Ⅰ 13, and then tie the strap Ⅱ 213 to the strap Ⅰ 13.

[0034] Step 2: Start the hydraulic cylinder 211 to drive the top plate 11 and then drive the workpiece to move upward.

[0035] Step 3: Start the motor Ⅰ 228 to finely adjust the workpiece in the vertical direction.

[0036] Step 4: Push the sleeve 2213 with a tool to drive the ring 222 to rotate. Then start the motor Ⅱ 2214 to push the connecting rod 2210 to move on the horizontal plane, and then drive the hoisting device 1 to move on the horizontal plane through the hydraulic cylinder 211.

[0037] The working principle of the present invention is: When using this device, connect the workpiece to the hoisting device 1 through the strap Ⅰ 13, and then tie the strap Ⅱ 213 to the strap Ⅰ 13. Fix the workpiece through three fixed points to reduce the large amplitude shaking generated during the hoisting process of the workpiece, thereby avoiding worker injuries or workpiece collision damage;

[0038] Then start the hydraulic cylinder 211. The hydraulic cylinder 211 drives the top plate 11 and then drives the workpiece to move upward through the connecting rope 12 and the strap Ⅰ 13; when the workpiece moves close to the construction position, turn off the hydraulic cylinder 211;

[0039] When there is a deviation in the vertical height between the workpiece and the predetermined construction position, start the motor Ⅰ 228. The motor Ⅰ 228 drives the transmission gear 229 to rotate. The transmission gear 229 drives the transmission ring 227 to rotate through the tooth groove. The transmission ring 227 is inserted into the groove at the top of the support plate 223 through a bearing. Therefore, the transmission ring 227 cannot move vertically. The rotation of the transmission ring 227 drives the hydraulic cylinder 211 to move through the thread on the inner circular surface. The hydraulic cylinder 211 is restricted by the top plate 11 and another base 2 and cannot rotate. Therefore, it can only move vertically through the thread, and then drive the top plate 11 to move vertically, and the top plate 11 drives the workpiece to move vertically to finely adjust the workpiece in the vertical direction;

[0040] When there is a deviation between the workpiece and the predetermined construction position on the horizontal plane, the sleeve 2213 is pushed by a tool to rotate around the connecting rod 2210, thereby causing the collar to rotate accordingly. At the same time, since the screw 2211 passes through the ring 222, the ring 222 rotates accordingly. During the rotation of the ring 222, since the hydraulic cylinder 211 receives the pressure from the lifting device 1, it cannot rotate. The hydraulic cylinder 211 is threadedly connected to the transmission ring 227, so the transmission ring 227 will not rotate accordingly. Therefore, when the ring 222 rotates, the lifting device 1 and the hydraulic cylinder 211 will not rotate accordingly. The lower end of the connecting rod 2210 is placed on the upper end of the bottom plate 221, and the support plate 223 is placed on the upper end of the ring 222. A plurality of balls are provided at the contact between the lower end surface of the support plate 223 and the ring 222 to reduce resistance. When the ring 222 rotates until the motor II 2214 faces or backs the direction in which the workpiece needs to move, stop rotating the ring 222, and then start the motors II 2214 on both bases 2 simultaneously. The motor II 2214 drives the sleeve 2213 to rotate, thereby driving the screw 2211 to move away from or towards the direction where the motor II 2214 is located. The screw 2211 drives the collar 2215 and the connecting rod 2210 to slide on the upper end surface of the bottom plate 221. The connecting rod 2210 drives the support plate 223, the transmission ring 227, the strut 224, and the limit ring 226 to move. The hydraulic cylinder 211 moves accordingly, and the hydraulic cylinder 211 drives the lifting device 1 to move accordingly, thereby driving the workpiece to move together. Since the ring 222 can rotate 360°, the workpiece can be finely adjusted in any direction on the horizontal plane such as Figure 9 for fine adjustment in any direction, facilitating the movement of the workpiece to the construction position. Moreover, the movement in both the vertical and horizontal directions is adjusted by threads, which is uniform and balanced, facilitating the timely shutdown of the power equipment to avoid the workpiece from being knocked.

[0041] During the upward movement of the hydraulic cylinder 211, the circular plate 212 is also driven to move upward. The circular plate 212 drives a plurality of auxiliary support devices to move upward. Among them, since the connecting rod 215 is stuck in the annular groove 225 through the slider I 2115, when the circular plate 212 moves upward, only the slide rod 214 can be driven to move upward. The upward movement of the slide rod 214 drives the push block 217 to move upward. The push block 217 contacts the inclined rod 218. Therefore, when the push block 217 moves upward, it drives the inclined rod 218 to move in the direction of the connecting rod 215 and compresses the spring until the push block 217 contacts the limiting rod 2118. While the inclined rod 218 moves toward the connecting rod 215, the inclined rod 218 also drives the rack 2114 to move. The rack 2114 drives the transmission wheel 2112 to rotate, and then drives the round rod I 219, the round rod II 2111, and the connecting cylinder 2110 to rotate along with the transmission wheel 2112, making the round rod I 219, the round rod II 2111, and the connecting cylinder 2110 inclined. And as the height of the hydraulic cylinder 211 increases, the angle between the round rod I 219, the round rod II 2111, and the connecting cylinder 2110 and the hydraulic cylinder 211 gradually increases. After the workpiece rises with the lifting device 1, the center of gravity also rises upward. The round rod II 2111 on the plurality of auxiliary support devices supports on the ground, which can prevent the device from tipping over; after the hydraulic cylinder 211 is closed, one hand pulls the round rod II 2111 downward so that its bottom end contacts the ground, and the other hand rotates the connecting cylinder 2110 to make the connecting cylinder 2110 rotate in the direction of the round rod I 219. During the rotation of the connecting cylinder 2110, through the threads at the top and bottom inner walls thereof, it is threadedly connected to the round rod I 219 and the round rod II 2111 respectively, so that the round rod II 2111 supports on the ground and provides a supporting force for this device;

[0042] During the use process, after the hydraulic cylinder 211 is closed, fine adjustment in the horizontal direction will be carried out. After the fine adjustment, the slide rod 214 can be pushed to move in the direction of the support plate 223, and then the round rod II 2111 is fixed, which can effectively avoid the problem of the center of gravity offset of the device after fine adjustment and prevent tipping over after the center of gravity offset.

[0043] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other forms of devices. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent conditions of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

[0044] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer, characterized in that: It includes a lifting device (1) and two bases (2); each of the said bases (2) includes a supporting device (21) and a direction fine-tuning device (22); the upper end of the direction fine-tuning device (22) is provided with a supporting device (21); the top end of the supporting device (21) is fixedly connected to the lifting device (1); the lifting device (1) is arranged between the two bases (2); and a plurality of auxiliary supporting devices are provided on the supporting device (21). The direction fine-tuning device (22) includes a bottom plate (221), a circular ring (222), a supporting plate (223), a support rod (224), a limiting ring (226), a transmission circular ring (227), a motor I (228), a transmission gear (229), a connecting rod I (2210), a screw rod (2211), a sleeve (2213), a motor II (2214) and a collar (2215); the circular ring (222) is sleeved on the upper end of the bottom plate (221) through a bearing, and a supporting plate (223) is placed on the upper end of the circular ring (222); the upper end of the supporting plate (223) is sleeved with a transmission circular ring (227) through a bearing and the upper end of the supporting plate (223) is also fixedly connected with a support rod (224), the upper end of the support rod (224) is fixedly connected with a limiting ring (226), and an annular groove is provided on the outer circular surface of the limiting ring (226); a tooth groove is provided on the outer circular surface of the transmission circular ring (227), and a thread is provided on the inner circular surface of the transmission circular ring (227); the motor I (228) is fixedly connected to the lower end of the limiting ring (226), a transmission gear (229) is fixedly connected to the output shaft of the motor I (228), and the transmission gear (229) meshes with the tooth groove on the outer circular surface of the transmission circular ring (227); the lower end of the supporting plate (223) is fixedly connected with a connecting rod I (2210), and the diameter of the connecting rod I (2210) is smaller than the inner diameter of the circular ring (222); the collar (2215) is sleeved on the outer circular surface of the connecting rod I (2210) through a bearing; a perforation is provided on the circular surface of the circular ring (222); one end of the screw rod (2211) is fixedly connected to the outer circular surface of the collar (2215), and the other end of the screw rod (2211) passes through the perforation and is in threaded connection with the sleeve (2213); the motor II (2214) is fixedly connected to the outer circular surface of the circular ring (222) through a bracket, and the output shaft of the motor II (2214) is fixedly connected with the sleeve (2213).

2. The lifting mechanism for auxiliary installation on the side wall of the wind tunnel boundary layer according to claim 1, characterized in that: The lifting device (1) includes a top plate (11), a connecting rope (12) and a strap I (13); the center of the bottom end of the top plate (11) is fixedly connected with the connecting rope (12), and the other end of the connecting rope (12) is fixedly connected with the strap I (13).

3. The lifting mechanism for auxiliary installation of the side wall of the wind tunnel boundary layer according to claim 2, characterized in that: The maximum distance between the outer circular surface of the connecting rod I (2210) and the inner wall of the circular ring (222) is less than or equal to one fifth of the radius of the supporting plate (223).

4. The lifting mechanism for auxiliary installation on the side wall of the wind tunnel boundary layer according to claim 3, characterized in that: The support device (21) includes a hydraulic cylinder (211). A circular plate (212) coaxial with the hydraulic cylinder (211) is fixedly connected to the side of the movable end of the hydraulic cylinder (211). A circular groove with a T-shaped cross-section is provided at the lower end of the circular plate (212). The fixed end of the hydraulic cylinder (211) is provided with a thread adapted to the inner circular surface of the transmission ring (227). The plurality of auxiliary support devices are in sliding fit with the circular groove, so that each auxiliary support device can rotate around the hydraulic cylinder (211).

5. The lifting mechanism for auxiliary installation of the side wall of the wind tunnel boundary layer according to claim 4, characterized in that: Each of the auxiliary support devices includes a connecting rod II (215), a circular rod I (219), a connecting cylinder (2110), a circular rod II (2111), a transmission wheel (2112), a support block (2113), and a slider I (2115); a slider I (2115) is fixedly connected to the side of the connecting rod II (215). The slider I (2115) is in sliding fit with the annular groove (225). The lower end of the connecting rod II (215) is fixedly connected to a support block (2113). A transmission wheel (2112) is connected to the side of the support block (2113) through a rotating shaft; a circular rod I (219) is fixedly connected to the side of the transmission wheel (2112). Threads are provided on the entire outer circular surface of the circular rod I (219). Threads are provided at both the top end and the bottom end of the inner circular surface of the connecting cylinder (2110). The thread at the top end of the inner circular surface of the connecting cylinder (2110) is adapted to the thread on the outer circular surface of the circular rod I (219); threads are provided at the top end of the outer circular surface of the circular rod II (2111). The thread at the top end of the outer circular surface of the circular rod II (2111) is adapted to the thread at the bottom end of the inner wall of the connecting cylinder (2110).

6. The lifting mechanism for auxiliary installation of the side wall of the wind tunnel boundary layer according to claim 5, characterized in that: Each of the auxiliary support devices further includes a sliding rod (214), a spring (216), a pushing block (217), an inclined rod (218), a rack (2114), a slider II (2117), and a limiting rod (2118); the connecting rod II (215) is L-shaped. A slider II (2117) is fixedly connected to the side of the horizontal end of the connecting rod II (215); the top end of the sliding rod (214) is in sliding fit with the circular groove. A sliding groove (2116) for sliding fit with the slider II (2117) is provided on the side of the sliding rod (214). A pushing block (217) is fixedly connected to the bottom end of the side of the sliding rod (214); the limiting rod (2118) is fixedly connected to the side of the vertical end of the connecting rod II (215); a rectangular groove for sliding fit with the limiting rod (2118) is provided on the inclined rod (218). The inclined rod (218) is obliquely arranged below the horizontal end of the connecting rod II (215). The inclined rod (218) is also in contact with the pushing block (217); one end of the spring (216) is fixedly connected to the side of the vertical end of the connecting rod II (215). The other end of the spring (216) is fixedly connected to the inclined rod (218); a rack (2114) is further fixedly connected to the lower end of the inclined rod (218); a groove adapted to the rack (2114) is provided on the outer circular surface of the transmission wheel (2112).

7. A lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer, according to claim 6, characterized in that: The supporting device (21) further includes a second strap (213). One end of the second strap (213) is fixedly connected to the side surface of the circular plate (212), and the other end of the second strap (213) is tied to the first strap (13).

8. The usage method of a lifting mechanism for auxiliary installation of the side wall of a wind tunnel boundary layer, according to claim 7, is characterized in that: The usage method includes the following steps: Step 1: Connect the workpiece to the lifting device (1) through the first strap (13), and then tie the second strap (213) to the first strap (13). Step 2: Start the hydraulic cylinder (211) to drive the top plate (11) and then drive the workpiece to move upward. Step 3: Start the first motor (228) to finely adjust the workpiece in the vertical direction. Step 4: Push the sleeve (2213) to drive the ring (222) to rotate. Subsequently, start the second motor (2214) to push the first connecting rod (2210) to move on the horizontal plane, and then drive the lifting device (1) to move on the horizontal plane through the hydraulic cylinder (211).

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