Lodging mechanism

Abstract

The utility model provides a lodging mechanism, and relates to the technical field of lodging mechanisms. The worm gear assembly is installed in the machine shell, and one end of the worm gear assembly penetrates out of the machine shell; the winding drum is rotationally connected to one side of the machine shell, the winding drum is connected to the outer end of the worm gear assembly in a sleeving and transmission mode, and a traction rope is wound around the winding drum; a transmission assembly; the lodging mechanism has the beneficial effects that the lodging mechanism is of a pure mechanical structure, has no electrical parts, has higher reliability, does not need a cable, and reduces the difficulty of winding and unwinding the cable in equipment at the top of the lifting rod while reducing the cost; related pipe joints on the lifting rod continuously and stably work all the time in the whole movement process, falling off and separation are avoided, impact cannot be generated in the work process, and compared with a mechanical lodging mechanism, the lodging mechanism can bear larger power or torque with the same structural strength.

Description

Technical Field

[0001] This utility model relates to the technical field of lodging mechanisms, and specifically to a lodging mechanism. Background Technology

[0002] When using boom lifts, a tilting mechanism is often used in conjunction. The boom lift is mounted on a vehicle to lift equipment that needs to be elevated, such as antennas, cameras, and lights. When the equipment on top of the boom lift is tall or long (such as a whip antenna), and to avoid affecting the vehicle's passage in confined spaces such as tunnels, a tilting mechanism is often added between the top of the boom lift and the equipment. When parked, the boom lift is extended, and the tilting mechanism stands the equipment upright, allowing it to function normally. When driving is required, the boom lift is closed, and the tilting mechanism tilts the equipment at an angle of 90°, 180°, etc., reducing its height to avoid affecting the vehicle's passage.

[0003] Currently, the tilting mechanisms used in the industry to power lifting poles mainly include electric tilting mechanisms and gear-rack driven mechanical tilting mechanisms.

[0004] The following problems exist when using the electric tilting mechanism:

[0005] As in this application Figure 1-3 As shown, the electric tilting mechanism b is driven by a motor, which tilts the equipment c through a worm gear or other reduction gear transmission. Because the electric tilting mechanism b contains a motor, electrical control and drive modules, limit switches, etc., its cost is relatively high, its structure is complex, and this reduces system reliability. Figure 3 As shown, the electric tilting mechanism b requires cable b1 to drive and control the motor, which increases the cost. The presence of cable b1 in the electric tilting mechanism also increases the difficulty of handling cable c1 on equipment c. For example, if equipment c only has one cable, the total number of cables will be two after adding the electric tilting mechanism b. If manual cable winding and unwinding is used, it will increase the workload of the operators. If an automatic cable winding and unwinding method is used, a more complex winding device is required.

[0006] The following problems exist when using a gear and rack driven mechanical knocking structure:

[0007] like Figure 4As shown, when the lifting rod a retracts, the mechanical tilting mechanism d is driven into a horizontal state by the pushing force of the rack pusher plate d1 on the rack d2 on other pipe sections of the lifting rod a. Simultaneously, the internal spring stores energy. When the lifting rod a extends, the spring force resets the mechanical tilting mechanism d and rack d2, and the mechanical tilting mechanism d enters a vertical state. The mechanical tilting mechanism d needs to contact or separate from the associated pipe sections during operation, which generates impact. Furthermore, the working section of the mechanical tilting mechanism d is the rack movement section, which is only a part of the pipe section's stroke. The mechanical tilting mechanism d has a short working time and needs to withstand significant power or torque, thus requiring higher structural strength. Utility Model Content

[0008] To address the aforementioned technical problems in the existing technology, a collapsing mechanism is provided.

[0009] The purpose and effects of this utility model are achieved by the following specific technical means:

[0010] A lodging mechanism, comprising:

[0011] chassis;

[0012] A worm gear assembly, wherein the worm gear assembly is installed inside the housing, and one end of the worm gear assembly extends through to the outside of the housing;

[0013] A drum is rotatably connected to one side of the machine housing and is sleeved and driven to the outer end of the worm gear assembly. A traction rope is wound around the outside of the drum.

[0014] A transmission assembly, which is installed inside the housing and connected to the inner end of the worm gear assembly, with one end of the transmission assembly extending through to the outside of the housing;

[0015] A spiral spring is installed on the other side of the housing and is connected to the outer end of the transmission assembly.

[0016] A further preferred embodiment: the worm gear assembly includes a worm, a worm wheel, and a worm wheel shaft. The worm wheel is sleeved and fixed on the worm wheel shaft. The worm and the worm wheel shaft are both rotatably connected inside the machine housing, and the worm and the worm wheel are connected in a transmission connection. The outer end of the worm passes through the machine housing and extends into the drum, where it is connected in a transmission connection with the drum. The inner end of the worm is connected in a transmission connection with the transmission assembly.

[0017] A further preferred embodiment: both the inner and outer ends of the worm gear are fitted with gears;

[0018] A toothed groove is formed on the inner side of the drum, and an external gear meshes with the toothed groove.

[0019] The transmission assembly includes a gear shaft and a second gear. The gear shaft is rotatably connected inside the housing and is connected to a spiral spring. The second gear is sleeved and fixed on the gear shaft and meshes with the first gear inside.

[0020] A further preferred embodiment: the outer end flange of the worm gear is connected to a first limiting flange, the first limiting flange is bolted to the housing, both ends of the worm gear shaft are connected to second limiting flanges, the second limiting flanges are bolted to the housing, and a limiting sleeve for limiting the worm gear is sleeved on the worm gear shaft.

[0021] A further preferred embodiment: the transmission ratio between gear one and gear two, and between gear one and tooth groove, is 1:1, and the transmission ratio between worm and worm wheel is 20:1.

[0022] A further preferred embodiment: the spiral spring component includes a spring box and a spiral spring, the spring box is fixed to the outer wall of the housing, the spiral spring is installed inside the spring box, and the outer end of the gear shaft extends into the spring box and is fixedly connected to the spiral spring.

[0023] A further preferred embodiment: the upper and lower sides of the housing and the side near the spiral spring are all open ends. The three open ends on the upper, lower, and side sides are respectively detachably connected to an upper end cover, a lower end cover, and a side cover. The spiral spring is detachably connected to the side cover. The side cover has a shaft hole, and the outer end of the gear shaft is rotatably connected to the shaft hole.

[0024] A further preferred embodiment: the length of the traction rope is in the range of [1.2m, 1.5m].

[0025] A further preferred embodiment: a lifting rod is installed at the lower end of the housing, a fixing frame is installed at the section of the lifting rod, and the lower end of the traction rope is tied to the fixing frame.

[0026] A further preferred embodiment: the housing is provided with a mounting bracket, the mounting bracket is fixedly connected to the worm gear assembly, and the device is bolted to the side of the mounting bracket.

[0027] Compared with the prior art, the beneficial effects of this utility model are:

[0028] Compared with the electric tilting mechanism, this tilting mechanism can not only achieve the tilting function, but also has a purely mechanical structure without electrical parts, which has higher reliability. In addition, this utility model uses the relative movement between the tubes in the middle of the lifting rod as the working power, which does not require cables, reducing costs and reducing the difficulty of retracting and extending the cables in the top equipment of the lifting rod.

[0029] Compared to mechanical tilting mechanisms, this tilting mechanism operates continuously and stably throughout the movement of the entire pipe section in the lifting rod, without detachment or separation. That is, the entire working process of the pipe section associated with the lifting rod, from the start of its movement to its stop, is the full stroke of that pipe section. In contrast, the working section of a mechanical tilting mechanism is the rack and pinion movement section, which is only a part of the pipe section's stroke. Furthermore, the mechanical tilting mechanism requires contact and separation from the associated pipe section during operation, which generates impact. Therefore, the tilting mechanism of this application has a longer working time, requires less power or torque, and has lower structural strength requirements, representing a significant improvement. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the electric tilting mechanism in the background art of this utility model, showing the lifting rod closed and the tilting mechanism horizontal when the vehicle is in motion;

[0031] Figure 2 This is a schematic diagram of the electric tilting mechanism in the background art of this utility model, showing the lifting rod closed and the tilting mechanism vertical when in the parking state;

[0032] Figure 3 This is a schematic diagram of the electric tilting mechanism in the background art of this utility model, showing the lifting rod extended and the tilting mechanism vertical when the vehicle is in the parking state.

[0033] Figure 4 This is a schematic diagram of the mechanical collapse structure in both horizontal and vertical states in the background art of this utility model;

[0034] Figure 5 This is a three-dimensional structural diagram of the overturning mechanism in an embodiment of this utility model;

[0035] Figure 6 This is a side view of the overturning mechanism in an embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of the main structure of the overturning mechanism in an embodiment of this utility model;

[0037] Figure 8 This is an exploded view of the overturning mechanism in an embodiment of this utility model;

[0038] Figure 9 This is a side cross-sectional view of the overturning mechanism in an embodiment of the present invention.

[0039] Figure 10 This is a schematic diagram of the front cross-sectional structure of the overturning mechanism in an embodiment of this utility model;

[0040] Figure 11 This utility model Figure 5 A schematic diagram of the structure after the middle side cover has been removed from the housing;

[0041] Figure 12 This is a front view schematic diagram of the horizontal and vertical states of the overturning mechanism in this embodiment of the utility model;

[0042] Figure 13 This utility model Figure 12 A schematic diagram of the structure after the traction rope is replaced with a traction belt;

[0043] Figure 14 This is a schematic diagram of the main cross-sectional structure of the embodiment of the present invention, showing the spiral spring directly mounted on the worm gear;

[0044] Figure 15 This is a three-dimensional structural diagram of the spiral spring directly connected to the worm gear shaft in an embodiment of this utility model;

[0045] Figure 16 This utility model Figure 15 A schematic diagram of the side view cross-sectional structure in the middle;

[0046] Figure 17 This is a front view schematic diagram of the limiting steps fixed on both sides of the lower part of the casing in an embodiment of this utility model.

[0047] The diagram shows the following components: housing 1, upper end cover 11, lower end cover 12, mounting bracket 13, side cover 14, worm gear assembly 2, worm 21, limit flange 1 211, gear 1 212, worm gear 22, limit sleeve 221, worm gear shaft 23, limit flange 231, transmission assembly 3, gear shaft 31, gear 2 32, drum 4, traction rope 5, traction belt 51, spiral spring component 6, spring box 61, spiral spring 62, fixing bracket 7, limit step 8, lifting rod a, electric tilting mechanism b, equipment c, mechanical tilting mechanism d. Detailed Implementation

[0048] Please see Figure 5-17 The embodiments of this utility model will be further described below;

[0049] like Figure 5 , 8As shown in Figure 12, a tilting mechanism includes: a housing 1, a worm gear assembly 2, a drum 4, a transmission assembly 3, and a spiral spring 6; the worm gear assembly 2 is installed inside the housing 1, and one end of the worm gear assembly 2 extends to the outside of the housing 1; a mounting bracket 13 is provided on the housing 1, the mounting bracket 13 is fixedly connected to the worm gear assembly 2, and a device c is bolted to the side of the mounting bracket 13; a lifting rod a is installed at the lower end of the housing 1, and a fixing bracket 7 is installed at the pipe section of the lifting rod a; the drum 4 is rotatably connected to one side of the housing 1, and the drum 4 is sleeved and transmitted to the outer end of the worm gear assembly 2; a traction rope 5 is wound around the outside of the drum 4, and the lower end of the traction rope 5 is tied to the fixing bracket 6. The fixed frame 7 is mounted on the housing 1. The transmission component 3 is installed inside the housing 1 and is connected to the inner end of the worm gear assembly 2. One end of the transmission component 3 extends through the outer side of the housing 1. The spiral spring component 6 is installed on the other side of the housing 1 and is connected to the outer end of the transmission component 3. In use, the lifting rod a can be mounted on the vehicle so that the lifting rod a and the tilting mechanism can be moved to the required location. The lifting rod a is used to fix and raise and lower the tilting mechanism. The tilting mechanism is used to tilt the equipment c, which includes equipment such as antennas, cameras, and lights that need to be raised. In the initial state, the lifting rod a is in the retracted state, and the tilting mechanism and equipment c are both in a horizontal state.

[0050] When the lifting rod a is extended, the fixing frame 7 at the pipe section of the lifting rod a will pull the traction rope 5 out from the drum 4, which can drive the drum 4 to rotate. The drum 4 will drive the worm gear assembly 2, which will drive the mounting frame 13 and the equipment c to rotate until the equipment c rotates to the working position, that is, from the horizontal state to the vertical state. At the same time, the worm gear assembly 2 will drive the transmission assembly 3 to store energy in the spiral spring 6.

[0051] When the lifting rod a retracts, the energy-storing spiral spring 6 drives the transmission assembly 3 and the worm gear assembly 2 to reverse, causing the mounting frame 13 and the equipment c to rotate to their initial state. At the same time, the worm gear assembly 2 drives the drum 4 to rotate in the opposite direction, and the traction rope 5 is rewound onto the drum 4.

[0052] Compared with the electric tilting mechanism b, this application can not only achieve the tilting function, but also has a pure mechanical structure without electrical parts, which has higher reliability. In addition, this utility model uses the relative movement between the tubes in the lifting rod a as the working power, which does not require cables, reducing costs and reducing the difficulty of retrieving and laying cables in the top device c of the lifting rod a.

[0053] Compared with the mechanical overturning mechanism d, the entire pipe section of the lifting rod a operates continuously and stably throughout its movement, without detachment or separation. That is, the entire working process of the pipe section associated with the lifting rod a is the full range of the pipe section from the start of its movement to its stop. In contrast, the working section of the mechanical overturning mechanism d is the rack and pinion movement section, which is only a part of the pipe section's movement stroke. Furthermore, the mechanical overturning mechanism d needs to contact and separate from the associated pipe section during operation, which generates impact. Therefore, the overturning mechanism of this application has a longer working time, requires less power or torque, and has lower structural strength requirements, representing a significant improvement.

[0054] like Figure 8 As shown, the worm gear assembly 2 includes a worm 21, a worm gear 22, and a worm gear shaft 23. The worm gear 22 is sleeved and fixed on the worm gear shaft 23. The worm 21 and the worm gear shaft 23 are both rotatably connected inside the housing 1, and the worm 21 is driven by the worm gear 22. The outer end of the worm 21 passes through the housing 1 and extends into the drum 4 and is driven by the drum 4. The inner end of the worm 21 is driven by the transmission assembly 3. The two ends of the mounting bracket 13 are fixedly connected to the two ends of the worm gear shaft 23, respectively.

[0055] like Figure 10 As shown, gear 212 is fixedly fitted at both the inner and outer ends of the worm gear 21; a toothed groove is formed on the inner side of the drum 4, and the outer gear 212 meshes with the toothed groove; the transmission assembly 3 includes a gear shaft 31 and a gear 32, the gear shaft 31 is rotatably connected to the housing 1, and the gear shaft 31 is connected to the spiral spring 6, the gear 32 is fitted and fixed on the gear shaft 31, and the gear 32 meshes with the inner gear 212; the transmission ratio between gear 212 and gear 32, and between gear 212 and the toothed groove are all 1:1, and the transmission ratio between the worm gear 21 and the worm wheel 22 is 20:1; the length of the traction rope 5 is in the range of [1.2m, 1.5m].

[0056] like Figure 8 As shown, in order to ensure the stable operation of the worm 21, worm wheel 22 and worm wheel shaft 23, a limiting flange 211 is connected to the outer flange of the worm 21. The limiting flange 211 is bolted to the housing 1. Both ends of the worm wheel shaft 23 are connected to limiting flanges 231. The limiting flanges 231 are bolted to the housing 1. A limiting sleeve 221 for limiting the worm wheel 22 is sleeved on the worm wheel shaft 23.

[0057] like Figure 8 , 10 As shown in Figure 11, the spiral spring component 6 includes a spring box 61 and a spiral spring 62. The spring box 61 is fixed to the outer wall of the housing 1, and the spiral spring 62 is installed inside the spring box 61. The outer end of the gear shaft 31 extends into the spring box 61 and is fixedly connected to the spiral spring 62.

[0058] like Figure 5 and 8As shown, the upper and lower sides of the housing 1 and the side near the scroll spring 6 are all open ends. The three open ends on the upper, lower, and side sides are respectively detachably connected (such as by bolts, snaps, etc.) to an upper end cover 11, a lower end cover 12, and a side cover 14. The scroll spring 6 is detachably connected (such as by bolts, snaps, etc.) to the side cover 14. The side cover 14 has a shaft hole, and the outer end of the gear shaft 31 is rotatably connected to the shaft hole. The upper end cover 11 and the lower end cover 12 are used to close the open ends on the upper and lower sides of the housing 1, respectively. The side cover 14 is used to close the open ends on the side of the housing 1 and also serves as the mounting structure for the scroll spring 6. The arrangement of the upper end cover 11, the lower end cover 12, and the side cover 14 makes it convenient for workers to install multiple components inside the housing 1.

[0059] The working principle of this application is as follows:

[0060] In use, the lifting rod a is mounted on the vehicle so that the lifting rod a and the overturning mechanism can be moved to the desired location. The lifting rod a is used to fix and raise / lower the overturning mechanism, and the overturning mechanism is used to overturn the device c. In the initial state, the lifting rod a is in the retracted state, and both the overturning mechanism and device c are in a horizontal state. Figure 12 .

[0061] When the vehicle needs to be lifted after parking, the lifting rod a is unfolded. The fixing frame 7 at the section of the lifting rod a will pull the traction rope 5 out of the drum 4, which can drive the drum 4 to rotate. The drum 4 will drive the worm 21 to rotate, and the worm 21 will drive the worm wheel 22 and the worm wheel shaft 23 to rotate, thereby driving the mounting frame 13 and the equipment c to rotate to the working position of the equipment c. The worm wheel assembly 2 will drive the mounting frame 13 and the equipment c to rotate until the equipment c rotates to the working position, that is, from the horizontal state to the vertical state. During the rotation of the worm 21, it will drive the two gears 1 212 on it to rotate. One of the gears 1 212 will drive the gear 2 32 to drive the gear shaft 31 to rotate. The gear shaft 31 will drive the spiral spring 62 in the spring box 61 to coil and store energy.

[0062] Before driving, when equipment c needs to be retracted, the lifting rod a is first retracted. The pre-wound, energy-storing spiral spring 6 drives the worm gear 21 to rotate in the opposite direction via gear shaft 31, gear 22, and gear 212. The worm gear 21 then drives the worm wheel 22 and worm wheel shaft 23 to rotate in the opposite direction, so that the mounting frame 13 and equipment c rotate to their initial state. At the same time, the rotation of the worm gear 21 drives the drum 4 to rotate in the opposite direction, so that the pulled-out traction rope 5 is rewound onto the drum 4.

[0063] It should be noted that during the operation, this application uses the separation motion between the lifting rod a pipe as the power source, and drives the drum 4 to rotate through the traction rope 5, thereby driving the overturning mechanism to work.

[0064] When conventional equipment c relies solely on the self-locking action of the worm gear 21 and worm wheel 22 for braking, the gap between the worm gear 21 and worm wheel 22 increases after prolonged use, causing significant shaking of equipment c. To avoid this adverse effect, an additional braking device is usually required. However, this application incorporates a spiral spring 62, which provides deceleration transmission to the worm wheel assembly 2 during use. With sufficient preload torque, the worm gear c can be prevented from shaking arbitrarily without the need for an additional braking device.

[0065] like Figure 12 As shown, the relevant pipe sections on the lifting rod a work continuously and stably throughout the entire movement process, without detaching or separating, and without generating impact during operation. Compared with the mechanical overturning mechanism d, the same structural strength can withstand greater power or torque.

[0066] like Figure 13 As shown, the traction rope 5 is wound around the drum 4 in a spiral manner, or the traction belt 51 can be wound around the drum 4 in a layered manner.

[0067] like Figure 14 As shown, in order to save space, the spiral spring 62 in the example is connected to the worm gear 21 through the gear shaft 31 and the gear 22. In application scenarios with sufficient space, the spiral spring 62 can be directly installed on the worm gear 21 for driving.

[0068] This application can be used not only on lifting rod a, but also on other similar telescopic structures;

[0069] In the example, after the spiral spring 62 has stored energy, when the collapsing mechanism is required to work in the reverse direction, the spiral spring 62 transmits power to the worm gear 21 through the gear shaft 31 and gear 22. The worm gear 21 then drives the worm wheel 22 and the worm wheel shaft 23 to work in the reverse direction. Besides this design, such as... Figure 15 and 16 As shown, the spiral spring 62 can also be directly connected to the worm gear shaft 23. After the spiral spring has stored energy, when the collapsing mechanism is required to work in reverse, the spiral spring 62 directly drives the worm gear shaft 23 to work in reverse, and drives the drum 4 to wind the traction rope 5 through the worm gear 22 and the worm 21. This structure requires that the transmission structure of the worm 21 and the worm gear 22 has no self-locking property.

[0070] In this example, the transmission between the spiral spring 62 and the worm gear 21 is a gear transmission. In applications, other transmission methods such as chain transmission and belt transmission can also be used, as long as they can be achieved.

[0071] When the spiral spring 62 drives device c to rotate back to its initial position (specific operations will not be detailed here), device c is limited by the traction rope 5: when the lifting rod a is fully retracted, the traction rope 5 is taut under the action of the spiral spring 62 driving the drum 4, limiting the rotation of the drum 4, thereby limiting the continued rotation of device c, thus completing the limitation. If necessary, an additional mechanical limiting structure can be designed, for example... Figure 17 In the middle, limit steps 8 are fixed on both sides of the lower part of the housing 1. The limit steps 8 are used to limit the mounting bracket 13.

[0072] Specific examples are as follows:

[0073] like Figure 7 , 9 As shown in Figures 10 and 11, the tilting angle of device c is 90°, the transmission ratio between gear 1 212 and gear 2 32, and between gear 1 212 and tooth groove are all 1:1, and the transmission ratio between worm 21 and worm wheel 22 is 20:1; the maximum working length of the traction rope 5 driven by the rope end fixing frame 7 on the lifting rod a is 1 meter.

[0074] Since the working angle of device c is 90°, which means it rotates 0.25 times, the worm gear 22 rotates 0.25 times, and the worm 21 rotates 5 times, the diameter of the drum 4 is designed to ensure that the drum 4 rotates 5 times when the traction rope 5 reaches a working length of 1 meter. Since the gear transmission ratio is 1:1, the working number of the spiral spring 62 is designed to be 5 times, which meets the requirements.

[0075] The tilting mechanism moves from vertical to horizontal: When the lifting rod a retracts, if at a certain moment the fixed frame 7 (at the lower end of the traction rope 5) moves 1 / n meters in the retraction direction, its working stroke is 1 / n of its maximum working length. At this moment, the spiral spring 62 drives the worm gear 21 and the drum 4 to wind all the "redundant" traction rope 5 tightly onto the drum 4. The specific operation will not be described in detail. The spiral spring 62 rotates 5 / n times. The worm gear 22, worm gear shaft 23 and equipment c rotate (5 / n) ÷ 20 = 1 / (4n) times, which is 1 / n of 0.25 times. That is, at any given moment, the fixed frame 7 moves 1 / n in the contraction direction, the tilting mechanism tilts from vertical to horizontal at an angle equal to 1 / n of its total working angle, and the spiral spring 62 drives the drum 4 to wind up to 1 / n of its maximum working number of turns (5 turns in this example). This ensures the synchronization and uniformity of the ratio of the number of turns of the spiral spring 62 driving the drum 4 to wind up the traction rope 5 to the maximum working number of turns, the ratio of the length of the traction rope 5 wound to the maximum working length, the ratio of the number of working turns of the spiral spring 62 to the maximum working turn of turns, and the ratio of the rotation angle of the equipment c to the maximum working angle throughout the entire process.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A collapsing mechanism, characterized in that, include: Casing (1); Worm gear assembly (2), wherein the worm gear assembly (2) is installed inside the housing (1), and one end of the worm gear assembly (2) extends through to the outside of the housing (1); The drum (4) is rotatably connected to one side of the housing (1), and the drum (4) is sleeved and driven to the outer end of the worm gear assembly (2). A traction rope (5) is wound around the outside of the drum (4). Transmission assembly (3), which is installed inside the housing (1) and connected to the inner end of the worm gear assembly (2) for transmission, and one end of the transmission assembly (3) extends through to the outside of the housing (1); A spiral spring (6) is installed on the other side of the housing (1) and is connected to the outer end of the transmission assembly (3) for transmission.

2. The collapsing mechanism according to claim 1, characterized in that: The worm gear assembly (2) includes a worm (21), a worm wheel (22) and a worm wheel shaft (23). The worm wheel (22) is sleeved and fixed on the worm wheel shaft (23). The worm (21) and the worm wheel shaft (23) are both rotatably connected inside the housing (1), and the worm (21) is connected to the worm wheel (22) in a transmission connection. The outer end of the worm (21) passes through the housing (1) and extends into the drum (4) and is connected to the drum (4) in a transmission connection. The inner end of the worm (21) is connected to the transmission assembly (3) in a transmission connection.

3. The collapsing mechanism according to claim 2, characterized in that: The worm (21) is fitted with gears (212) at both its inner and outer ends; A toothed groove is provided on the inner side of the drum (4), and the external gear (212) meshes with the toothed groove. The transmission assembly (3) includes a gear shaft (31) and a second gear (32). The gear shaft (31) is rotatably connected inside the housing (1) and is connected to a spiral spring (6). The second gear (32) is sleeved and fixed on the gear shaft (31) and meshes with the first gear (212) inside.

4. A collapsing mechanism according to claim 2 or 3, characterized in that: The outer flange of the worm (21) is connected to a limiting flange one (211), which is bolted to the housing (1). Both ends of the worm gear shaft (23) are connected to limiting flange two (231), which is bolted to the housing (1). A limiting sleeve (221) for limiting the worm gear (22) is sleeved on the worm gear shaft (23).

5. The collapsing mechanism according to claim 3, characterized in that: The transmission ratios of gear 1 (212) and gear 2 (32), and gear 1 (212) and tooth groove are both 1:1, and the transmission ratios of worm (21) and worm wheel (22) are both 20:

1.

6. The collapsing mechanism according to claim 3, characterized in that: The spiral spring component (6) includes a spring box (61) and a spiral spring (62). The spring box (61) is fixed to the outer wall of the housing (1). The spiral spring (62) is installed inside the spring box (61). The outer end of the gear shaft (31) extends into the spring box (61) and is fixedly connected to the spiral spring (62).

7. A collapsing mechanism according to claim 3 or 6, characterized in that: The upper and lower sides of the housing (1) and the side near the spiral spring (6) are open ends. The three open ends on the upper, lower and side sides are respectively detachably connected to the upper end cover (11), the lower end cover (12) and the side cover (14). The spiral spring (6) is detachably connected to the side cover (14). The side cover (14) has a shaft hole. The outer end of the gear shaft (31) is rotatably connected to the shaft hole.

8. The collapsing mechanism according to claim 1, characterized in that: The length of the traction rope (5) ranges from [1.2m to 1.5m].

9. The collapsing mechanism according to claim 1, characterized in that: A lifting rod (a) is installed at the lower end of the housing (1), and a fixing frame (7) is installed at the pipe section of the lifting rod (a). The lower end of the traction rope (5) is tied to the fixing frame (7).

10. A collapsing mechanism according to claim 2, characterized in that: The housing (1) is provided with a mounting bracket (13), which is fixedly connected to the worm gear assembly (2), and the mounting bracket (13) is bolted to the side of the device (c).

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