A new protective device
By using the worm gear angle adjustment component and the sliding fit design of the splicing shell, the problem of the inability to adjust the angle of traditional protective devices is solved, achieving multi-path adaptation and low-cost safety protection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 枣庄市城市建设房屋拆迁中心
- Filing Date
- 2025-08-27
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional protective devices are fixed, integrated structures that cannot be adjusted in angle, making them unsuitable for curved passages, irregular corners, or temporary changes in the protective path, increasing costs and creating safety hazards.
The worm gear and worm angle adjustment assembly is adopted. The worm helix angle is less than the equivalent friction angle of the meshing surface and the transmission ratio is ≥10:1, which realizes angle self-locking. Combined with the sliding fit design of the splicing shell and the insert plate and the bolt locking, it realizes modular design and quick docking.
It enables flexible adjustment of the angle of the protective device, adapts to multiple protection paths, reduces costs, avoids the need for customized connectors in traditional devices, and improves safety and convenience.
Smart Images
Figure CN224532305U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of construction protection technology, and specifically relates to a new type of protective device. Background Technology
[0002] In construction projects, municipal construction, and large equipment installation, protective devices are core facilities for ensuring construction safety. They are mainly used to isolate dangerous areas, such as the edges of high-altitude operations, the operating range of equipment, and both sides of temporary passages, to prevent people from falling, objects from hitting them, or people from accidentally entering dangerous areas.
[0003] Traditional protective devices are mostly integrated fixed structures with no adjustable angle, and can only be used for straight protective scenarios. When the construction area is a curved passage, an irregular corner, or the protective path is temporarily changed, special connectors or cut guardrails are required, which not only increases costs but also leads to gaps in the protection and creates safety hazards. Utility Model Content
[0004] To address the above problems, the purpose of this utility model is to provide a new type of protective device that solves the problem that traditional protective devices are mostly integrated fixed structures with no adjustable angles, which can only be adapted to straight protective scenarios. When the construction area is an arc-shaped passage, an irregular corner, or the protective path is temporarily changed, it is necessary to customize special connectors or cut guardrails, which not only increases costs but also leads to gaps in the protection and creates safety hazards.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: a novel protective device, comprising a base plate, a protective railing fixedly mounted on the top surface of the base plate, a side plate one and a side plate two fixedly mounted on both sides of the protective railing, and mounting seats fixedly mounted on opposite sides of the side plate two facing away from the protective railing, each mounting seat containing an angle adjustment component, the angle adjustment component comprising a worm gear rotatably mounted in the mounting seat and a worm engaging with it, the shafts of the two sets of worm gears being respectively connected to one end of a splicing shell, the splicing shell having slots, the slots being slidably fitted into a plug plate fixed on the side plate one facing away from the protective railing.
[0006] The beneficial effects of this utility model are:
[0007] In the angle adjustment assembly, the worm gear and worm adopt the parameters of "helix angle less than the equivalent friction angle of the meshing surface + transmission ratio ≥10:1", which makes the adjusted angle stable and self-locking. The worm can drive the worm gear to drive the splicing shell to flexibly adjust the angle, adapting to various protection paths such as straight lines and corner arcs. Moreover, no additional locking parts are required after adjustment, reducing costs.
[0008] The sliding fit design of the splicing shell and the insert plate, combined with the threaded locking of the bolts, achieves the dual effect of "quick docking + rigid fixation". The whole device adopts a modular design, which can be flexibly selected in terms of quantity according to the protection needs of the construction site, and is also easy to transport.
[0009] To ensure that the worm gear mechanism has a reverse self-locking characteristic:
[0010] As a further improvement to the above technical solution: the helix angle of the worm is smaller than the equivalent friction angle of the meshing surface between the worm wheel and the worm, and the transmission ratio between the worm wheel and the worm is not less than 10:1.
[0011] The beneficial effects of this improvement are: by limiting the helix angle of the worm to be less than the equivalent friction angle of the meshing surface between the worm wheel and the worm, and the transmission ratio to be not less than 10:1, the worm wheel and worm gear mechanism is ensured to have reverse self-locking characteristics.
[0012] To provide stable rotational support for the worm gear:
[0013] As a further improvement to the above technical solution: the worm gear is rotatably disposed in the mounting cavity opened in the mounting base, and the shaft end of the worm gear passes through and is rotatably connected to the mounting base.
[0014] The beneficial effects of this improvement are: it limits the axial displacement of the worm wheel, ensuring precise meshing with the worm, and provides stable rotational support for the worm wheel, avoiding changes in the meshing clearance due to shaking.
[0015] To provide convenient operating points for angle adjustment:
[0016] As a further improvement to the above technical solution: one end of the worm gear passes through the connection between the mounting base and the second side plate and is rotatably connected to it, and one end of each of the two sets of worm gears is respectively fixed with a driving wheel and a driven wheel. A synchronous belt is sleeved on the outside of the driving wheel and the driven wheel. A protective shell is provided on the outside of the synchronous belt, the driving wheel, and the driven wheel. The protective shell is fixed on the side of the second side plate facing the guardrail, and a movable rod is fixed at the end of the driving wheel away from the worm gear. The movable rod passes through and is rotatably connected to the protective shell, and an adjusting block is fixed at the end of the movable rod that passes through the protective shell.
[0017] The beneficial effects of this improvement are as follows: the worm gear passes through the mounting base and the side plate to achieve power transmission; the drive wheel, driven wheel and synchronous belt cooperate to ensure that the two sets of worm gears rotate synchronously, so that the angle adjustment on both sides of the splicing shell is consistent; the protective shell protects the synchronous belt and other transmission components from dust and collision; the adjusting block drives the drive wheel to rotate through the movable rod, providing a convenient operating point for angle adjustment.
[0018] To ensure the insert plate can be smoothly inserted into the slot and connected to the splicing shell:
[0019] As a further improvement to the above technical solution: a slot is provided on one side of the splicing shell to be slidably adapted to the insert plate.
[0020] The benefit of this improvement is that it ensures that the insert plate can be smoothly inserted into the slot and connected to the splicing shell.
[0021] For ease of disassembly and installation:
[0022] As a further improvement to the above technical solution: an internal threaded hole is provided through the center of the insert plate, and a bolt is threaded through and connected to one side of the splicing shell. The end of the bolt is adapted to the internal threaded hole to lock the insert plate and the splicing shell.
[0023] The beneficial effects of this improvement are: by connecting the internal threaded hole of the insert plate to the bolt thread of the splicing shell, the relative positions of the insert plate and the slot are locked after they are fitted together, which facilitates disassembly and installation.
[0024] In order to limit the entire device to a designated position:
[0025] As a further improvement to the above technical solution: several mounting holes are equidistantly provided on both sides of the base plate.
[0026] The beneficial effects of this improvement are: the mounting holes are used to install expansion bolts and other fasteners, anchoring the entire device to the ground, scaffolding or other foundation structures, preventing the device from moving due to external forces.
[0027] In summary, the beneficial effects of this case are as follows:
[0028] In the angle adjustment assembly, the worm gear and worm adopt the parameters of "helix angle less than the equivalent friction angle of the meshing surface + transmission ratio ≥10:1", which makes the adjusted angle stable and self-locking. The worm can drive the worm gear to drive the splicing shell to flexibly adjust the angle, adapting to various protection paths such as straight lines and corner arcs. Moreover, no additional locking parts are required after adjustment, reducing costs.
[0029] The sliding fit design of the splicing shell and the insert plate, combined with the threaded locking of the bolts, achieves the dual effect of "quick docking + rigid fixation". The whole device adopts a modular design, which can be flexibly selected in terms of quantity according to the protection needs of the construction site, and is also easy to transport.
[0030] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0031] Figure 1 This is a schematic diagram of the structure of this utility model;
[0032] Figure 2 This is a schematic diagram of the assembled structure of this utility model;
[0033] Figure 3 This is a schematic cross-sectional view of the mounting base and splicing shell of this utility model;
[0034] Figure 4 This is a schematic diagram of the splicing shell structure of this utility model;
[0035] In the diagram: 1. Base plate; 2. Guardrail; 201. Side plate one; 202. Side plate two; 3. Insert plate; 4. Mounting base; 5. Splicing shell; 6. Protective shell; 7. Angle adjustment assembly; 701. Worm gear; 702. Worm; 703. Adjusting block; 704. Synchronous belt; 8. Bolt. Detailed Implementation
[0036] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.
[0037] like Figure 1-4 As shown, a novel protective device includes a base plate 1. A protective railing 2 is fixedly mounted on the top surface of the base plate 1. Side plates 1 and 201 are fixedly mounted on both sides of the protective railing 2, respectively. Mounting seats 4 are fixedly mounted on opposite sides of the side plates 202 facing away from the protective railing 2. An angle adjustment component 7 is provided in each mounting seat 4. The angle adjustment component 7 includes a worm gear 701 rotatably mounted in the mounting seat 4 and a worm 702 meshing with it. The shafts of the two sets of worm gears 701 are respectively connected to one end of a splicing shell 5. A slot is provided on the splicing shell 5. The slot is slidably fitted into an insert plate 3 fixed on the side plate 1 201 facing away from the protective railing 2.
[0038] The helix angle of the worm 702 is smaller than the equivalent friction angle of the meshing surface between the worm wheel 701 and the worm 702, and the transmission ratio between the worm wheel 701 and the worm 702 is not less than 10:1. By limiting the helix angle of the worm 702 to be smaller than the equivalent friction angle of the meshing surface between the worm wheel 701 and the worm 702, and the transmission ratio to be not less than 10:1, the worm gear mechanism is ensured to have reverse self-locking characteristics.
[0039] The worm gear 701 is rotatably mounted in the mounting cavity opened in the mounting base 4, and the shaft end of the worm gear 701 passes through and is rotatably connected to the mounting base 4; this restricts the axial displacement of the worm gear 701, ensuring that it meshes precisely with the worm 702, and also provides stable rotational support for the worm gear 701, avoiding changes in the meshing clearance due to shaking.
[0040] One end of the worm gear 702 passes through the connection between the mounting base 4 and the second side plate 202 and is rotatably connected to it. One end of each of the two sets of worm gears 702 is fixed with a driving wheel and a driven wheel, respectively. A synchronous belt 704 is sleeved on the outside of the driving wheel and the driven wheel. A protective shell 6 covers the outside of the synchronous belt 704, the driving wheel, and the driven wheel. The protective shell 6 is fixed on the side of the second side plate 202 facing the guardrail 2. A movable rod is fixed at the end of the driving wheel away from the worm gear 702. The movable rod passes through and rotatably connects to the protective shell 6, and an adjusting block 703 is fixed at the end of the movable rod passing through the protective shell 6. The worm gear 702 passes through the mounting base 4 and the second side plate 202 to transmit power. The driving wheel, the driven wheel, and the synchronous belt 704 cooperate to ensure that the two sets of worm gears 702 rotate synchronously, making the angle adjustment on both sides of the splicing shell 5 consistent. The protective shell 6 protects the synchronous belt 704 and other transmission components from dust and impact. The adjusting block 703 drives the driving wheel to rotate through the movable rod, providing a convenient operating point for angle adjustment.
[0041] The splicing shell 5 has a slot on one side that is slidably adapted to the insert plate 3, ensuring that the insert plate 3 can be smoothly inserted into the slot and connected to the splicing shell 5.
[0042] The insert plate 3 has an internal threaded hole through its center, and a bolt 8 is threaded through and connected to one side of the splicing shell 5. The end of the bolt 8 is adapted to the internal threaded hole to lock the insert plate 3 and the splicing shell 5. The bolt 8 of the splicing shell 5 is threaded through the internal threaded hole of the insert plate 3 and the bolt 8 of the splicing shell 5, and the relative position of the insert plate 3 and the slot is locked after they are fitted together, which facilitates disassembly and installation.
[0043] The base plate 1 has several mounting holes equidistantly through both sides; the mounting holes are used to insert expansion bolts and other fasteners to anchor the device as a whole to the ground, scaffolding or other foundation structure to prevent the device from moving due to external forces.
[0044] The working principle and usage process of this utility model are as follows: When using this device, the user can first carry it to the construction site where protection is required. Then, according to the protection path, adjust the angle of the splicing shell 5. The operator rotates the adjusting block 703 clockwise or counterclockwise according to the required angle. The adjusting block 703 drives the movable rod and the driving wheel to rotate, which in turn drives the driven wheel through the synchronous belt 704, causing the two sets of worm gears 702 to rotate synchronously. The worm gears 702 mesh with the worm wheel 701, driving the shaft of the worm wheel 701 to rotate, thereby driving the splicing shell 5 to rotate around the mounting base 4. During the rotation, the angle change can be observed until the target angle is reached. After the rotation is completed, the user releases the device. Adjusting block 703, since the helix angle of worm 702 is less than the equivalent friction angle of the meshing surface and the transmission ratio is ≥10:1, the worm gear mechanism automatically reverses and locks itself, and the angle of the splicing shell 5 is locked. Take another set of protective devices, align the insert plate 3 of its side plate 201 facing away from the guardrail 2 with the slot of the splicing shell 5 of the previous device, push the next device, so that the insert plate 3 slides into the slot, and then screw in the bolt 8 on one side of the splicing shell 5, so that the end of the bolt 8 is screwed into the internal thread hole of the insert plate 3 until the bolt 8 fits with the splicing shell 5. After the adjustment is completed, the device can be fixed in a specified position by inserting expansion bolts and other fasteners through the mounting holes opened on the base plate 1.
[0045] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0046] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of this utility model to other occasions without modification, should all be considered within the protection scope of this utility model.
Claims
1. A novel protective device, characterized in that: The base plate (1) is provided with a guardrail (2) fixed on its top surface. Side plate 1 (201) and side plate 2 (202) are fixed on both sides of the guardrail (2). Mounting base (4) is fixed on the opposite side of side plate 2 (202) facing away from the guardrail (2). Angle adjustment component (7) is provided in each mounting base (4). The angle adjustment component (7) includes a worm gear (701) rotatably disposed in the mounting base (4) and a worm (702) meshing with it. The shafts of the two sets of worm gears (701) are respectively connected to one end of the splicing shell (5). The splicing shell (5) is provided with a slot. The slot is slidably fitted into the insert plate (3) fixed on the side of side plate 1 (201) facing away from the guardrail (2).
2. The novel protective device according to claim 1, characterized in that: The helix angle of the worm (702) is less than the equivalent friction angle of the meshing surface between the worm wheel (701) and the worm (702), and the transmission ratio between the worm wheel (701) and the worm (702) is not less than 10:
1.
3. The novel protective device according to claim 1, characterized in that: The worm gear (701) is rotatably disposed in the mounting cavity opened in the mounting base (4), and the shaft end of the worm gear (701) is rotatably connected to the mounting base (4).
4. The novel protective device according to claim 1, characterized in that: One end of the worm gear (702) passes through the connection between the mounting base (4) and the second side plate (202) and is rotatably connected to it. One end of each of the two sets of worm gears (702) is fixed with a driving wheel and a driven wheel respectively. A synchronous belt (704) is provided on the outside of the driving wheel and the driven wheel. A protective shell (6) is provided on the outside of the synchronous belt (704), the driving wheel and the driven wheel. The protective shell (6) is fixed on the side of the second side plate (202) facing the guardrail (2). A movable rod is fixed at the end of the driving wheel away from the worm gear (702). The movable rod passes through and is rotatably connected to the protective shell (6). An adjusting block (703) is fixed at the end of the movable rod that passes through the protective shell (6).
5. A novel protective device according to claim 1, characterized in that: The splicing shell (5) has a slot on one side that is slidably adapted to the insert plate (3).
6. A novel protective device according to claim 1, characterized in that: The insert plate (3) has an internal threaded hole through the center, and a bolt (8) is threaded through and connected to one side of the splicing shell (5). The end of the bolt (8) is adapted to the internal threaded hole to lock the insert plate (3) and the splicing shell (5).
7. A novel protective device according to claim 1, characterized in that: The base plate (1) has several mounting holes that are equidistantly opened on both sides.