Dust falling equipment for building construction

Abstract

The utility model belongs to the technical field of building construction dust falling, and particularly relates to a dust falling device for building construction, which comprises a left side support frame main body and a right side support frame main body which are arranged on the left side and the right side, a connecting plate is arranged between the left side support frame main body and the right side support frame main body, and a moving assembly is arranged on the connecting plate. The moving assembly comprises a sliding rail fixed to the upper surface of the connecting plate, a sliding seat slidably connected to the surface of the sliding rail and a water mist spray head fixedly installed on the top of the sliding seat, and a support is fixed to the surface of one end of the connecting plate. Due to the fact that only one water mist nozzle is needed to cover the whole construction area, water resource waste caused by simultaneous water spraying of a plurality of water mist nozzles is avoided, compared with a plurality of water mist nozzles, the number of the movable water mist nozzles is small, maintenance is simpler, the construction cost is reduced, and the using effect of the device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust reduction in building construction, and specifically relates to dust reduction equipment for building construction. Background Art

[0002] Construction refers to the production activities in the implementation stage of engineering construction. It is the construction process of various buildings. It can also be said to be the process of turning various lines on the design drawings into physical objects at designated locations. It includes foundation engineering construction, main structure construction, roofing engineering construction, decoration engineering construction, etc. The place where the construction work is done is called "construction site" or "construction site";

[0003] With the continuous development of construction engineering technology, various large-scale construction equipment emerges in an endless stream. Various construction equipment may generate a lot of dust during construction, thus affecting the construction environment. The construction dust suppression device is a device that suppresses the dust at the construction site. While bringing convenience to users, there are also many areas that can be optimized.

[0004] After checking the public (announcement) number; CN219596196U discloses a dust suppression device for construction sites. This technology discloses "including a dust suppression device and a supporting device, the supporting device is arranged at the back of the dust suppression device near both ends; the dust suppression device includes a connecting frame, the top of the connecting frame is provided with a plurality of atomizing nozzles, the back of the atomizing nozzle is provided with a connecting frame, and the back center of the connecting frame is provided with a connecting flange pipe and other technical solutions. After the multiple groups of atomizing nozzles on the dust suppression device are connected to the external pressurized water source through the connecting flange pipe, atomization spraying is performed to achieve the effect of dust reduction, and the motor drives the screw rod and the screw rod nut to drive the connecting frame to rise and fall, so as to carry out dust reduction operations at different heights, and the left bracket and the right bracket only need to be fixedly installed on the ground, so as to achieve the technical effects of avoiding water accumulation, easy installation, spray type, and dust reduction at a lifting height. ";

[0005] When the above design is used, although multiple groups of atomizing nozzles are connected to the external pressurized water source through the connecting flange pipe to spray atomized water, which has the effect of dust reduction, the number of multiple groups of atomizing nozzles is large, and maintenance is more complicated, while increasing the construction cost, and multiple nozzles spraying at the same time may cause a waste of resources and reduce the use effect of the device;

[0006] In order to solve the above problems, this application proposes a dust reduction device for construction. Utility Model Content

[0007] To solve the problems raised in the above background technology. The utility model provides a dust suppression device for construction, which has the characteristics of using a mobile water mist nozzle to save water resources, because only one water mist nozzle is needed to cover the entire construction area, avoiding the waste of water resources caused by multiple water mist nozzles spraying water at the same time, and compared with multiple water mist nozzles, the number of mobile water mist nozzles is small, maintenance is simpler, and construction costs are reduced, and the use effect of the device is improved.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a dust reduction equipment for construction construction, comprising a left support frame body and a right support frame body arranged on the left and right sides, a connecting plate is installed between the left and right support frame bodies, and a moving assembly is installed on the connecting plate, and the moving assembly comprises a slide rail fixed on the upper surface of the connecting plate, a sliding seat slidably connected to the surface of the slide rail, and a water mist nozzle fixedly installed on the top of the sliding seat. A bracket is fixed on the surface of one end of the connecting plate, and a driving motor is installed inside the bracket by bolts, and a winding roller is fixed on the output end of the driving motor, and a rope 1 is wound around the surface of the winding roller, a rope 2 is fixed on one side of the sliding seat, and a frame is fixed on the upper surface of the connecting plate away from the bracket, and a moving wheel 3 and a moving wheel 2 are respectively arranged on the upper and lower sides of the frame, and the moving wheel 3 and the moving wheel 2 are both rotatably connected to the frame through a rotating shaft, and a weighting block is arranged on one side of the frame.

[0009] As a preferred dust reduction equipment for construction of the utility model, a symmetrically arranged side plate is fixed to the upper surface of the connecting plate close to the winding roller, and a moving wheel one is rotatably connected between the two sets of side plates via a rotating shaft, one end of the rope one passes through the connecting plate, is wrapped around the surface of the moving wheel one, and is fixedly connected to the surface of the sliding seat, the other end of the rope one is fixedly connected to the winding roller, one end of the rope two is respectively wrapped around the moving wheel two and the moving wheel three, and is fixedly connected to the weight block, a rotating rod is fixed at the center of one end of the winding roller, and the rotating rod is rotatably connected through a bearing and a bracket.

[0010] As a preferred embodiment of the dust reduction equipment for construction of the utility model, the surface of the frame is fixed with symmetrically arranged strip plates, the surface of the weight block is provided with limiting grooves matched with the strip plates, and the weight block and the strip plates are slidably connected through the limiting grooves.

[0011] As a preferred embodiment of the dust reduction equipment for construction of the utility model, both ends of one side of the slide rail are threadedly connected with limiting bolts.

[0012] As a preferred embodiment of the dust reduction device for construction of the utility model, a protective cover is fixedly installed on one side of the bracket surface close to the driving motor by bolts, and the driving motor is installed inside the protective cover.

[0013] As a preferred embodiment of the dust reduction equipment for construction of the utility model, a diffusion component is installed on the sliding seat, and the diffusion component includes an adjusting bolt rotatably connected to the sliding seat through a bearing, a U-shaped frame threadedly connected to the surface of the adjusting bolt, and a limit rod symmetrically arranged and fixed to the surface of the sliding seat, a rolling wheel is arranged inside the U-shaped frame, a straight rod 1 is fixed at the center of the rolling wheel, and both ends of the straight rod 1 are rotatably connected to the U-shaped frame through bearings, a straight rod 2 is fixed to the other end of the straight rod 1, and a gear 1 is fixed to the top of the straight rod 2, the surface of the gear 1 is meshingly connected to the gear 2, a straight rod 3 is fixed at the inner center of the gear 2, and the bottom end of the straight rod 3 is rotatably connected to the U-shaped frame through a bearing, and a fan blade is fixed to the top of the straight rod 3.

[0014] As a preferred dust reduction device for construction of the utility model, a movable groove adapted to the limiting rod is opened on the surface of the U-shaped frame, the U-shaped frame and the limiting rod are slidably connected through the movable groove, and an anti-slip pad is fixed on the side of the connecting plate surface close to the rolling wheel.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By setting up a mobile component, using a mobile water mist nozzle can save water resources, because only one water mist nozzle is needed to cover the entire construction area, avoiding the waste of water resources caused by multiple water mist nozzles spraying water at the same time. Moreover, compared with multiple water mist nozzles, the number of mobile water mist nozzles is small, maintenance is simpler, and construction costs are reduced. The use effect of the device is improved. In addition, a diffusion component is added to this mechanism to generate a certain wind force, which can diffuse the sprayed water mist to a wider range, increase the contact area with dust particles, and thus improve the dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

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

[0019] Figure 2 This is a structural cross-sectional view of the protective cover in the utility model;

[0020] Figure 3 It is a structural cross-sectional view of the frame in the utility model;

[0021] Figure 4 It is a structural schematic diagram of the U-shaped frame and connecting parts such as adjusting bolts in the utility model.

[0022] In the figure: 1. left support frame body; 2. right support frame body; 3. connecting plate; 4. moving assembly; 401. slide rail; 402. sliding seat; 403. rope one; 404. limiting bolt; 405. moving wheel one; 406. winding rod; 407. driving motor; 408. bracket; 409. protective cover; 410. water mist nozzle; 411. rope two; 412. frame; 413. moving wheel two; 414. moving wheel three; 415. weight block; 416. limiting groove; 417. strip plate; 5. diffusion assembly; 501. U-shaped frame; 502. adjusting bolt; 503. limiting rod; 504. rolling wheel; 505. anti-skid pad; 506. gear one; 507. gear two; 508. fan blade. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] like Figure 1 As shown:

[0026] A dust reduction device for construction includes a left support frame body 1 and a right support frame body 2 arranged on the left and right sides, and a connecting plate 3 is installed between the left support frame body 1 and the right support frame body 2.

[0027] In this embodiment: the existing device {publication (announcement) number}: CN219596196U discloses a dust reduction equipment for construction site construction. The left support frame body 1 and the right support frame body 2 in the application document adopt the same technical means in this prior art. This technical means will not be repeated here. This application makes further improvements on this existing body. For details, please refer to the disclosed technology below; to solve the technical problems existing in this prior art, as disclosed in the background technology above, "when the above-mentioned design is in use, although multiple groups of atomizing nozzles are connected to an external pressurized water source through a connecting flange pipe, atomizing spray is performed to achieve the effect of dust reduction, but the number of multiple groups of atomizing nozzles is large, maintenance is more complicated, and the construction cost is increased, and multiple nozzles spraying at the same time may cause waste of resources and reduce the use effect of the device". In terms of combined use, this problem is obviously a real problem that exists and is difficult to solve. In view of this, in order to solve this technical problem, a moving component 4 and a diffusion component 5 are added to the application document, and the electrical equipment involved in this product are all powered by an external power supply.

[0028] It should be noted that the accessories used by the left support frame body 1 and the right support frame body 2 have been disclosed by publication number CN219596196U, and their use effects can be referred to publication number CN219596196U (i.e., the "left support frame and right support frame components" disclosed in this prior art).

[0029] More specifically:

[0030] like Figure 1-Figure 4 As shown:

[0031] A moving assembly 4 is installed on the connecting plate 3, and the moving assembly 4 includes a slide rail 401 fixed on the upper surface of the connecting plate 3, a sliding seat 402 slidably connected to the surface of the slide rail 401, and a water mist nozzle 410 fixedly installed on the top of the sliding seat 402. A bracket 408 is fixed to the surface of one end of the connecting plate 3, and a driving motor 407 is installed inside the bracket 408 by bolts. A winding rod 406 is fixed to the output end of the driving motor 407, and a rope 1 403 is wound around the surface of the winding rod 406. A rope 2 411 is fixed to one side of the sliding seat 402. A frame 412 is fixed to the end of the upper surface of the connecting plate 3 away from the bracket 408, and a moving wheel 3 414 and a moving wheel 2 413 are respectively arranged on the upper and lower sides of the frame 412. The moving wheel 3 414 and the moving wheel 2 413 are both rotatably connected to the frame 412 through a rotating shaft, and a weight block 415 is arranged on one side of the frame 412;

[0032] A symmetrically arranged side plate is fixed on the upper surface of the connecting plate 3 near the winding roller 406, and a moving wheel 405 is rotatably connected between the two sets of side plates via a rotating shaft. One end of a rope 403 passes through the connecting plate 3, is wrapped around the surface of the moving wheel 405, and is fixedly connected to the surface of the sliding seat 402. The other end of the rope 403 is fixedly connected to the winding roller 406. One end of the rope 2 411 is respectively wrapped around a moving wheel 2 413 and a moving wheel 3 414, and is fixedly connected to the weight block 415. A rotating rod is fixed at the center of one end of the winding roller 406, and the rotating rod is rotatably connected through a bearing and a bracket 408.

[0033] In this embodiment: when the dust reduction equipment for construction is used, first connect the external water source to the water mist nozzle 410, and water is sprayed out through the water mist nozzle 410 to form water mist for dust reduction operation. At this time, the driving motor 407 is started to drive the winding rod 406 to rotate. As the winding rod 406 rotates, the rope 1 403 is wound. At this time, the rope 1 403 moves on the moving wheel 1 405. The moving wheel 1 405 can reduce the friction between the rope 1 403 and the connecting plate 3, avoid wear on the rope 1 403, and increase the service life of the rope 1 403. The sliding seat 402 is driven by the rope 1 403 to slide on the slide rail 401. As the sliding seat 402 pulls the rope 2 411, the rope 2 411 moves on the moving wheel 2 413 and the moving wheel 3 414, and the weighting block is driven by the rope 2 411 415 moves up, and when the sliding seat 402 drives the water mist nozzle 410 to move to a certain distance, the driving motor 407 drives the winding rod 406 to rotate in the opposite direction to release the rope 1 403. At this time, the gravity of the weight block 415 drives the sliding seat 402 to move in the opposite direction through the rope 2 411. Through this operation, the sliding seat 402 can drive the slide rail 401 to move back and forth, and then drive the water mist nozzle 410 to move synchronously. Through this operation, using a mobile water mist nozzle 410 can save water resources, because only one water mist nozzle 410 is needed to cover the entire construction area, avoiding the waste of water resources caused by multiple water mist nozzles 410 spraying water at the same time, and compared with multiple water mist nozzles 410, the number of mobile water mist nozzles 410 is small, maintenance is simpler, and construction costs are reduced, thereby improving the use effect of the device.

[0034] Going further;

[0035] In an optional embodiment, the surface of the frame 412 is fixed with symmetrically arranged strip plates 417 , and the surface of the weight block 415 is provided with a limiting groove 416 adapted to the strip plates 417 , and the weight block 415 and the strip plates 417 are slidably connected through the limiting groove 416 .

[0036] In the present embodiment, while the weight block 415 moves, it slides on the surface of the strip plate 417 through the limit groove 416. The setting of the limit groove 416 and the strip plate 417 can improve the stability of the movement of the weight block 415, avoid shaking of the weight block 415 due to strong winds, and further improve the use effect of the weight block 415.

[0037] Going further;

[0038] In an optional embodiment, both ends of one side of the slide rail 401 are threadedly connected with limit bolts 404 .

[0039] In this embodiment, when the slide rail 401 moves, the slide seat 402 can be limited by the setting of the limiting bolt 404 .

[0040] Going further;

[0041] In an optional embodiment, a protective cover 409 is fixedly mounted on a side of the surface of the bracket 408 close to the driving motor 407 by bolts, and the driving motor 407 is installed inside the protective cover 409 .

[0042] In this embodiment, the driving motor 407 is protected by the protective cover 409 to prevent water from entering the driving motor 407 and to increase the service life of the driving motor 407 .

[0043] Further,

[0044] In an optional embodiment, a diffusion component 5 is installed on the sliding seat 402, and the diffusion component 5 includes an adjusting bolt 502 rotatably connected to the sliding seat 402 through a bearing, a U-shaped frame 501 threadedly connected to the surface of the adjusting bolt 502, and a limit rod 503 fixed to the surface of the sliding seat 402 and symmetrically arranged, a rolling wheel 504 is arranged inside the U-shaped frame 501, a straight rod 1 is fixed at the center of the rolling wheel 504, and both ends of the straight rod 1 are rotatably connected to the U-shaped frame 501 through a bearing, a straight rod 2 is fixed to the other end of the straight rod 1, and a gear 1 506 is fixed to the top of the straight rod 2, and a gear 2 507 is meshedly connected to the surface of the gear 1 506, a straight rod 3 is fixed at the inner center of the gear 2 507, and the bottom end of the straight rod 3 is rotatably connected to the U-shaped frame 501 through a bearing, and a fan blade 508 is fixed to the top of the straight rod 3;

[0045] A moving groove matched with the limiting rod 503 is opened on the surface of the U-shaped frame 501, and the U-shaped frame 501 and the limiting rod 503 are slidably connected through the moving groove. An anti-slip pad 505 is fixed on the side of the connecting plate 3 close to the rolling wheel 504.

[0046] In this embodiment: before the sliding seat 402 moves, the U-shaped frame 501 is driven to move by rotating the adjusting bolt 502. During this process, the U-shaped frame 501 can be limited by the limiting rod 503. As the U-shaped frame 501 moves, the rolling wheel 504 is driven to move until the rolling wheel 504 is tightly fitted with the anti-skid pad 505. The provision of the anti-skid pad 505 can increase the friction with the rolling wheel 504, so that the rolling wheel 504 can rotate better. While the sliding seat 402 moves, the rolling wheel 504 is driven to rotate, and the rolling wheel 504 drives the gear 1 506 to rotate. Since the gear 1 506 and the gear 2 507 are meshed and connected, the gear 2 507 is driven to rotate, and the fan blade 508 is driven to rotate by the gear 2 507. When the fan blade 508 rotates, a certain wind force is generated, which can diffuse the sprayed water mist to a wider range, increase the contact area with the dust particles, and thus improve the dust removal efficiency.

[0047] Working principle and use process of the utility model: when using the dust reduction equipment for construction, first connect the external water source with the water mist nozzle 410, then water is sprayed out through the water mist nozzle 410 to form water mist for dust reduction operation, then start the driving motor 407 to drive the winding roller 406 to rotate, during this process, the driving motor 407 is protected by the protective cover 409 to prevent water from intruding into the driving motor 407, thereby increasing the service life of the driving motor 407, as the winding roller 406 rotates and the rope 403 is wound, the rope 403 moves on the moving wheel 405, and the moving wheel 405 can reduce the friction between the rope 403 and the connecting plate 3, thereby avoiding the rope 403 from being damaged. 403 causes wear and tear, thereby increasing the service life of rope 1 403. Rope 1 403 drives the sliding seat 402 to slide on the slide rail 401. As the sliding seat 402 pulls rope 2 411, rope 2 411 moves on moving wheel 2 413 and moving wheel 3 414. Rope 2 411 drives weight block 415 to move upward. When the sliding seat 402 drives the water mist nozzle 410 to move to a certain distance, the driving motor 407 drives the winding rod 406 to rotate in the opposite direction to release rope 1 403. At this time, the gravity of weight block 415 drives the sliding seat 402 to move in the opposite direction through rope 2 411. Through this operation, the sliding seat 402 can drive the slide rail 401 to move back and forth, thereby Drive the water mist nozzle 410 to move synchronously. Through this operation, using a mobile water mist nozzle 410 can save water resources, because only one water mist nozzle 410 is needed to cover the entire construction area, avoiding the waste of water resources caused by multiple water mist nozzles 410 spraying water at the same time. Moreover, compared with multiple water mist nozzles 410, the number of mobile water mist nozzles 410 is small, maintenance is simpler, and construction costs are reduced, thereby improving the use effect of the device. When the sliding seat 402 moves on the slide rail 401, the setting of the limiting bolt 404 can limit the sliding seat 402. At the same time, when the weight block 415 moves, it slides on the surface of the strip plate 417 through the provided limiting groove 416. Through the limiting groove 416 and The arrangement of the strip plate 417 can improve the stability of the movement of the weight block 415 and prevent the weight block 415 from shaking due to a strong wind, thereby further improving the use effect of the weight block 415. Before the sliding seat 402 moves, the U-shaped frame 501 is driven to move by rotating the adjusting bolt 502. During this process, the U-shaped frame 501 can be limited by the limiting rod 503. As the U-shaped frame 501 moves, the rolling wheel 504 is driven to move until the rolling wheel 504 is tightly fitted with the anti-skid pad 505. The arrangement of the anti-skid pad 505 can increase the friction with the rolling wheel 504, so that the rolling wheel 504 can rotate better. When the sliding seat 402 moves, the rolling wheel 504 is driven to rotate.The rolling wheel 504 drives the gear 1 506 to rotate. Since the gear 1 506 is meshed with the gear 2 507, the gear 2 507 is driven to rotate. The fan blade 508 is driven to rotate by the gear 2 507. When the fan blade 508 rotates, a certain wind force is generated, which can spread the sprayed water mist to a wider range, increase the contact area with the dust particles, and thus improve the dust removal efficiency.

[0048] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A dust suppression device for construction, comprising a left support frame body (1) and a right support frame body (2) arranged on the left and right sides, a connecting plate (3) being installed between the left support frame body (1) and the right support frame body (2), characterized in that: A moving assembly (4) is installed on the connecting plate (3), and the moving assembly (4) comprises a slide rail (401) fixed on the upper surface of the connecting plate (3), a sliding seat (402) slidably connected to the surface of the slide rail (401), and a water mist nozzle (410) fixedly installed on the top of the sliding seat (402); a bracket (408) is fixed on one end surface of the connecting plate (3), a driving motor (407) is installed inside the bracket (408) by bolts, and a winding roller (406) is fixed on the output end of the driving motor (407) A rope 1 (403) is wound around the surface of the winding roller (406), a rope 2 (411) is fixed to one side of the sliding seat (402), a frame (412) is fixed to the end of the upper surface of the connecting plate (3) away from the bracket (408), and a moving wheel 3 (414) and a moving wheel 2 (413) are respectively arranged on the upper and lower sides of the frame (412), and the moving wheel 3 (414) and the moving wheel 2 (413) are rotatably connected to the frame (412) through a rotating shaft, and a weight block (415) is arranged on one side of the frame (412).

2. The dust suppression equipment for construction according to claim 1, characterized in that: A symmetrically arranged side plate is fixed on the upper surface of the connecting plate (3) near the winding roller (406), and a moving wheel (405) is rotatably connected between the two sets of side plates via a rotating shaft. One end of the rope (403) passes through the connecting plate (3), is wound around the surface of the moving wheel (405), and is fixedly connected to the surface of the sliding seat (402). The other end of the rope (403) is fixedly connected to the winding roller (406). One end of the rope (411) is respectively wound around the moving wheel (413) and the moving wheel (414), and is fixedly connected to the weight block (415). A rotating rod is fixed at the center of one end of the winding roller (406), and the rotating rod is rotatably connected via a bearing and a bracket (408).

3. The dust suppression equipment for construction according to claim 2, characterized in that: The surface of the frame (412) is fixed with symmetrically arranged strip plates (417), the surface of the weight block (415) is provided with a limiting groove (416) adapted to the strip plates (417), and the weight block (415) and the strip plates (417) are slidably connected via the limiting groove (416).

4. The dust suppression equipment for construction according to claim 3, characterized in that: Both ends of one side of the slide rail (401) are threadedly connected with limit bolts (404).

5. The dust suppression equipment for construction according to claim 4, characterized in that: A protective cover (409) is fixedly mounted on one side of the surface of the bracket (408) close to the driving motor (407) by means of bolts, and the driving motor (407) is mounted inside the protective cover (409).

6. The dust suppression equipment for construction according to claim 5, characterized in that: A diffusion assembly (5) is mounted on the sliding seat (402), and the diffusion assembly (5) comprises an adjusting bolt (502) rotatably connected to the sliding seat (402) via a bearing, a U-shaped frame (501) threadedly connected to the surface of the adjusting bolt (502), and a limiting rod (503) fixed to the surface of the sliding seat (402) and arranged symmetrically, a rolling wheel (504) is arranged inside the U-shaped frame (501), a straight rod 1 is fixed at the center of the rolling wheel (504), and both ends of the straight rod 1 are rotatably connected to the U-shaped frame (501) via a bearing, a straight rod 2 is fixed at the other end of the straight rod 1, and a gear 1 (506) is fixed at the top of the straight rod 2, and the surface of the gear 1 (506) is meshingly connected to the gear 2 (507), a straight rod 3 is fixed at the center of the inner part of the gear 2 (507), and the bottom end of the straight rod 3 is rotatably connected to the U-shaped frame (501) via a bearing, and a fan blade (508) is fixed at the top of the straight rod 3.

7. The dust suppression equipment for construction according to claim 6, characterized in that: The surface of the U-shaped frame (501) is provided with a movable groove adapted to the limiting rod (503), the U-shaped frame (501) and the limiting rod (503) are slidably connected via the movable groove, and a non-slip pad (505) is fixed on one side of the surface of the connecting plate (3) close to the rolling wheel (504).

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