A wave-shaped guardrail plate screw fastening device

Abstract

This utility model discloses a screw fastening device for wave-shaped guardrails, including a power mechanism and a transmission mechanism. The power mechanism consists of a brushless electric wrench and a starter handle. The starter handle has a transmission head at its front end, which is connected to the transmission mechanism and drives it to rotate. The transmission mechanism includes a gear set, a transmission housing, and a screw head sleeve. The gear set is installed in the transmission cavity inside the transmission housing and is connected to the screw head sleeve, which is used to fit the screw head. The gear set consists of a drive gear, a large gear, two sets of small gears, and a fastening gear ring, forming a transmission chain that drives the screw head sleeve to rotate and fasten the screw. The transmission head is square and fits into the control groove on the drive gear, enabling quick assembly and disassembly. This device has a compact structure and can be operated flexibly in confined spaces, solving the problem of fastening screws on three-wave guardrails. The brushless electric wrench provides stable power, and the gear set transmission ensures that the screw is fastened in place in one go, improving construction efficiency and fastening quality. The screw head sleeve can be made according to the size of the nut, increasing its market applicability.

Description

Technical Field

[0001] This utility model relates to the field of screw fastening technology, and in particular to a screw fastening device for a corrugated guardrail panel. Background Technology

[0002] During the construction of corrugated guardrails, the tightening of screws is a crucial step, directly affecting the safety of highway traffic. In recent years, with the comprehensive implementation of highway guardrail upgrading projects, corrugated guardrails have been upgraded from two waves to three waves, a change that presents greater challenges to construction. When installing three-wave guardrail panels, the splicing screw locations of the square tube anti-blocking blocks are relatively concealed, making it difficult to operate an electric wrench in confined spaces. This necessitates relying on manual open-end wrenches for multiple tightening operations, a method with the following drawbacks:

[0003] Low work efficiency: The torque output of manual operation is unstable, requiring repeated adjustment of the wrench angle, and the tightening cycle of a single screw is extended by more than 40%;

[0004] Construction quality risks: Manual operation makes it difficult to ensure torque consistency, with measured torque deviation reaching ±20%, affecting anti-loosening performance;

[0005] Ergonomic defects: Operating in confined spaces can easily cause tools to slip, posing a safety hazard.

[0006] To address the drawbacks of manual operation, existing technologies, such as the utility model patent with patent publication number CN214870160U and patent name "A Tool for Tightening Guardrail Bolts", use an electric drill to tighten or loosen the bolts. Although this improves heat dissipation, it still uses a direct-drive structure and does not solve the problem of space adaptability, so it needs to be improved. Utility Model Content

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0008] Therefore, in order to solve the above-mentioned technical problems, this utility model provides the following technical solution: a wave-shaped guardrail screw fastening device, including a power mechanism and a transmission mechanism;

[0009] The power mechanism includes an electric wrench with a start handle. The front end of the start handle has a transmission head that works with the transmission mechanism. The transmission head is used to connect with the transmission mechanism and drive the transmission mechanism to rotate.

[0010] The transmission mechanism includes a gear set and a transmission housing. The gear set is rotatably installed inside the transmission housing. The gear set is connected to a screw head sleeve, which is rotatably connected to the transmission housing. The screw head sleeve is used to fit onto the screw head. The electric wrench transmits power to the transmission head, which drives the transmission mechanism to rotate. The transmission mechanism drives the screw head sleeve to rotate, thereby achieving the purpose of tightening the screw inside the screw head sleeve.

[0011] As a preferred embodiment of the wave guardrail screw fastening device of this utility model, the electric wrench is a brushless electric wrench, and the start handle is installed on the hand grip of the electric wrench.

[0012] As a preferred embodiment of the wave guardrail screw fastening device of this utility model, the transmission housing is integrally formed by machine tool processing, which has reliable processing accuracy, more stable quality, and good integrity and sealing; the transmission housing is provided with a transmission cavity adapted to the gear set structure, the gear set is rotatably installed in the transmission cavity, and the screw head sleeve and control groove are respectively arranged on the left and right sides of the transmission cavity.

[0013] As a preferred embodiment of the wave guardrail screw fastening device of this utility model, the gear set includes a drive gear connected to a transmission head, a large gear meshing and drivingly connecting one side of the drive gear, a small gear meshing and drivingly connecting the large gear, a fastening gear ring meshing and drivingly connecting the small gear, and a fastening gear ring being fixedly connected to a screw head sleeve. The screw head sleeve has a screw groove for connecting to the screw head. The gear set uses metal gears, which have high hardness, high strength, and strong torque transmission capability.

[0014] As a preferred embodiment of the wave guardrail screw fastening device of this utility model, the transmission head has a square structure, and the drive gear has a control groove adapted to the structure of the transmission head. The bottom of the transmission head is embedded in the control groove, so that the electric wrench drives the drive gear to rotate through the transmission head. The drive gear drives the screw in the screw head sleeve to rotate through the transmission of the large gear and the small gear.

[0015] As a preferred embodiment of the wave guardrail screw fastening device of this utility model, the small gear is provided in two sets, which are symmetrically arranged on the upper and lower parts of one side of the large gear, and both sets of small gears are meshed and connected to the fastening gear ring.

[0016] The beneficial effects of this utility model are:

[0017] 1. The entire device of this utility model has a compact structure. The transmission housing protects the gear set from external interference, while enabling the device to operate flexibly in a narrow space, perfectly solving the problem of fastening the screws of the three-wave guardrail.

[0018] 2. The square tenon joint structure of the transmission head and drive gear in this utility model enables quick assembly and disassembly. Combined with the standardized design of the screw slot, it makes tool replacement time shorter and operation simpler.

[0019] 3. This utility model uses a brushless electric wrench as a power source, providing stable and powerful power output. Through the transmission of the gear set, it can tighten the screws in place in one go. It can be operated flexibly even in narrow spaces, making it very suitable for construction work in limited spaces, which greatly improves construction efficiency and tightening quality.

[0020] 4. The device of this utility model has a simple structure and is easy to process and manufacture. The screw head sleeve on the fastening toothed ring can be made according to the size of the nut during actual production, so that it can be used to fasten different nuts and improve the market applicability of the equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the specific structure of the transmission mechanism of this utility model.

[0024] In the diagram: 100, power mechanism; 101, electric wrench; 102, starter handle; 103, transmission head;

[0025] 200. Transmission mechanism; 201. Transmission housing; 2011. Transmission cavity; 202. Screw head sleeve; 2021. Screw slot; 203. Drive gear; 2031. Control slot; 204. Large gear; 205. Small gear; 206. Fastening gear ring. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0030] Reference Figures 1-2 As an embodiment of this utility model, a screw fastening device for a wave-shaped guardrail is provided. The device includes a power mechanism 100 and a transmission mechanism 200, which realizes efficient screw fastening in a narrow space.

[0031] The core of the power mechanism 100 is the electric wrench 101. The electric wrench 101 is a brushless electric wrench, which has the advantages of less heat generation, higher operating efficiency, larger maximum output torque, lower noise and durability compared with traditional electric wrenches. The hand grip of the electric wrench 101 is equipped with a start handle 102 for easy operation by the operator. The front end of the start handle 102 is provided with a transmission head 103, which has a square structure and is designed to connect with the drive gear 203 of the transmission mechanism 200.

[0032] The transmission mechanism 200 includes a gear set and a transmission housing 201; a transmission cavity 2011 is provided inside the transmission housing 201, and the gear set is rotatably installed in the transmission cavity 2011 to ensure stable operation and effective protection of the gear set; a screw head sleeve 202 and a control groove 2031 are respectively arranged on the left and right sides of the transmission cavity 2011, and the screw head sleeve 202 is used to fit on the screw head to achieve screw fastening.

[0033] Specifically, the gear set includes a drive gear 203, a large gear 204, a small gear 205, and a fastening gear ring 206. The drive gear 203 has a control groove 2031 adapted to the structure of the transmission head 103. The bottom of the transmission head 103 is embedded in the control groove 2031, so that the electric wrench 101 can drive the drive gear 203 to rotate through the transmission head 103. The drive gear 203 is meshed with the large gear 204 on one side, and the large gear 204 is meshed with two sets of small gears 205. These two sets of small gears 205 are symmetrically arranged on the upper and lower parts of one side of the large gear 204, which enhances the stability of the transmission and the output of torque. The small gears 205 are meshed with the fastening gear ring 206, and the fastening gear ring 206 is fixedly connected to the screw head sleeve 202. The screw head sleeve 202 has a screw receiving groove 2021 for connecting to the screw head.

[0034] In actual use: The operator attaches the screw slot 2021 of the device to the screw head, and then holds the start handle 102 to insert the square end of the transmission head 103 of the electric wrench 101 into the control slot 2031 of the drive gear 203. The electric wrench 101 is triggered by the start handle 102, and the output shaft of the electric wrench 101 drives the transmission head 103 to rotate. The drive gear 203 drives the large gear 204 to rotate, and the large gear 204 drives two sets of small gears 205. Through the fastening gear ring 206, the screw head sleeve 202 rotates. The screw slot 2021 forms a surface contact with the screw head, outputting precise torque. When the torque value reaches the preset threshold, the electric wrench 101 automatically stops (this is a direct application of the control program of the electric wrench 101 in the prior art, and the specific working principle will not be described here). The operator can then remove the device from the screw head.

[0035] It is worth noting that the entire device is controlled by a controller. Since the controller is a common device and belongs to existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solution 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 solution of this utility model without departing from the spirit and scope of the technical solution 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 screw fastening device for a corrugated guardrail panel, characterized in that: It includes a power mechanism (100) and a transmission mechanism (200); The power mechanism (100) includes an electric wrench (101), on which a start handle (102) is arranged. At the front end of the start handle (102) is a transmission head (103) that works with the transmission mechanism (200). The transmission head (103) is used to connect with the transmission mechanism (200) and drive the transmission mechanism (200) to rotate. The transmission mechanism (200) includes a gear set and a transmission housing (201). The gear set is rotatably installed inside the transmission housing (201). The gear set is connected to a screw head sleeve (202). The screw head sleeve (202) is rotatably connected to the transmission housing (201). The screw head sleeve (202) is used to fit onto the screw head. The electric wrench (101) transmits power to the transmission head (103). The transmission head (103) drives the transmission mechanism (200) to rotate. The transmission mechanism (200) drives the screw head sleeve (202) to rotate, thereby achieving the purpose of tightening the screw inside the screw head sleeve (202).

2. The corrugated guardrail screw fastening device as described in claim 1, characterized in that: The electric wrench (101) is a brushless electric wrench (101), and the start handle (102) is installed on the hand grip of the electric wrench (101).

3. The corrugated guardrail screw fastening device as described in claim 1, characterized in that: The transmission housing (201) has a transmission cavity (2011) adapted to the gear set structure. The gear set is rotatably installed in the transmission cavity (2011). The screw head sleeve (202) and the control groove (2031) are respectively arranged on the left and right sides of the transmission cavity (2011).

4. The corrugated guardrail screw fastening device as described in claim 1, characterized in that: The gear set includes a drive gear (203) connected to the transmission head (103). A large gear (204) is meshed and connected to one side of the drive gear (203). A small gear (205) is meshed and connected to the large gear (204). A fastening gear ring (206) is meshed and connected to the small gear (205). The fastening gear ring (206) is fixedly connected to a screw head sleeve (202). The screw head sleeve (202) has a screw groove (2021) for connecting to the screw head.

5. The corrugated guardrail screw fastening device as described in claim 4, characterized in that: The transmission head (103) has a square structure. The drive gear (203) has a control groove (2031) adapted to the structure of the transmission head (103). The bottom of the transmission head (103) is embedded in the control groove (2031), so that the electric wrench (101) drives the drive gear (203) to rotate through the transmission head (103). The drive gear (203) is driven by the large gear (204) and the small gear (205) to drive the screw in the screw head sleeve (202) to rotate.

6. The corrugated guardrail screw fastening device as described in claim 4, characterized in that: The pinion (205) is provided in two sets. The two sets of pinion (205) are symmetrically arranged on the upper and lower parts of one side of the large gear (204). Both sets of pinion (205) are meshed and connected to the fastening gear ring (206) for transmission.

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