Electric open spanner

Abstract

The utility model relates to an electric open spanner which comprises a box body, a power rod, two transmission shafts and an open type clamping sleeve. An operation opening is formed in an outer side plate of the box, the power rod is rotatably installed on the box, the input end extends out of the box, and the output end is provided with a driving gear. The two transmission shafts are arranged on the two sides of the driving gear in the box body in parallel, driven gears are meshed with the driving gear, and worm sections are arranged at the ends, facing the operation opening, of the transmission shafts. The clamping sleeve is located between the worm sections of the two transmission shafts, the axial position is limited, the outer circumference is provided with outer teeth meshed with the two worm sections, the inner wall is provided with a clamping face clamping nut, and the side wall is provided with an opening groove and an operation opening to form a nut radial clamping channel. And the power rod synchronously drives the driven gear through the driving gear to drive the worm section of the transmission shaft to rotate so as to drive the clamping sleeve to rotate. The utility model has the remarkable technical effects of adapting to operation in a narrow space, improving the working efficiency, ensuring that the torque output is uniform and stable, meeting the requirements of various working conditions, being convenient to maintain and repair and the like.

Description

Technical Field

[0001] This utility model belongs to the field of wrench tool technology, and in particular relates to an electric open-end wrench. Background Technology

[0002] In many fields such as mechanical installation and maintenance, wrenches play a vital role as a commonly used tool. With the continuous development of industrial technology, higher requirements are being placed on the functionality, applicability, and ease of operation of wrenches.

[0003] While common electric wrenches on the market improve work efficiency to some extent, they still have many limitations in practical applications. Ordinary electric wrenches are typically equipped with a socket or a relatively enclosed wrench head, requiring a large operating space to accommodate their working parts. However, in some special working environments, such as spaces with hydraulic lines, the complex layout of hydraulic lines and relatively limited space make it difficult for the socket and enclosed wrench head of an ordinary electric wrench to fit smoothly and perform their function, rendering them ineffective. In such situations, operators often have to settle for using a standard open-end wrench.

[0004] While standard open-end wrenches can accommodate operations in confined spaces, they have a significant drawback: their operation is entirely manual. Operators must manually turn the wrench to tighten or loosen bolts or nuts, which is not only inefficient but also prone to causing operator fatigue, especially in scenarios requiring multiple turns. Furthermore, manual operation makes it difficult to precisely control the tightening torque, easily leading to under-tightening or over-tightening, thus affecting installation quality.

[0005] Torque open-end wrenches have solved the problem of ordinary open-end wrenches' inability to precisely control tightening torque to some extent, but they still face some challenges in practical use. In confined spaces, torque open-end wrenches are difficult to place and operate conveniently due to their structure, making operation quite strenuous for the operator. Furthermore, typical torque wrenches are usually designed to be long and bulky, making them inconvenient to carry and use during batch operations on-site, increasing the operator's workload.

[0006] More importantly, in certain special situations on site, it is necessary to precisely control the tightening torque while also meeting certain rotation requirements. However, existing ordinary electric wrenches, ordinary open-end wrenches, and torque open-end wrenches cannot simultaneously meet both requirements. As a result, in these situations, operators cannot complete their work efficiently and accurately, affecting project progress and quality.

[0007] Therefore, developing an electric open-end wrench that can operate in confined spaces, precisely control tightening torque, meet rotation requirements, and is convenient and efficient to operate is of great practical significance. Utility Model Content

[0008] To address the problems existing in the prior art, this utility model provides an electric open-end wrench that can be operated in confined spaces, precisely control the tightening torque, meet the rotation requirements, and is convenient and efficient to operate.

[0009] This utility model is implemented as follows: an electric open-end wrench, characterized by comprising: a housing with an open operating port on its outer side plate; a power rod rotatably mounted on the housing, with its input end extending outside the housing and its output end extending into the housing and equipped with a drive gear; two parallel drive shafts rotatably mounted inside the housing, located on either side of the drive gear, each drive shaft having a driven gear meshing with the drive gear, and each drive shaft having a worm section at its end facing the operating port; an open-type snap-fit ​​sleeve disposed between the worm sections of the two drive shafts, its axial position being restricted within the housing; the outer circumference of the snap-fit ​​sleeve has external teeth that simultaneously mesh with the worm sections of both drive shafts; the worm sections of the two drive shafts rotate in the same direction;

[0010] The inner wall of the snap-fit ​​sleeve is provided with a clamping surface for clamping the nut, and its side wall is provided with an opening groove that extends to the end face; wherein, the operating port is directly opposite the opening groove of the snap-fit ​​sleeve, forming a channel for the nut to be radially snapped in; the aforementioned power rod synchronously drives the driven gears on both sides through the driving gear, thereby driving the worm gear sections of the two transmission shafts to rotate, and thus jointly driving the snap-fit ​​sleeve to rotate.

[0011] More preferably, the housing is provided with a shoulder or retaining ring for axially limiting the snap-fit ​​sleeve.

[0012] More preferably, the shoulder is the outer toothed end face of the outer circumference of the snap-fit ​​sleeve.

[0013] More preferably, the power rod and / or drive shaft are mounted on the housing via bearings.

[0014] More preferably, the clamping surface is a polygonal inner wall surface or internal teeth.

[0015] More preferably, the input end of the power lever is provided with an interface for driving external tools.

[0016] More preferably, the interface is a hexagonal or square-headed connector.

[0017] More preferably, the housing is provided with a power rod support seat, which is rotatably engaged with the output end of the power rod to enhance the axial load-bearing stability of the power rod.

[0018] The advantages and technical effects of this utility model are as follows: The electric open-end wrench of this utility model achieves stable clamping and efficient rotation of the nut through the coordinated action of the power rod, driving gear, driven gear, transmission shaft, worm gear section, and clamping sleeve. Its technical effects are mainly reflected in the following aspects:

[0019] 1. Suitable for operation in confined spaces: The housing features a detachable and assembleable structure with an open operating port. Combined with the open-type snap-fit ​​design, this electric open-end wrench can be easily used in confined environments. For example, in areas with dense hydraulic lines, ordinary electric wrenches cannot be accessed due to their sockets or enclosed wrench heads, while this wrench can be operated smoothly, greatly expanding the application range of the wrench.

[0020] 2. Convenient and efficient operation: Compared to ordinary open-end wrenches that require manual operation, this electric open-end wrench is driven by a power rod, achieving automated operation and significantly improving work efficiency. Operators only need to insert the nut into the locking sleeve to quickly complete the tightening or loosening action, reducing fatigue and errors associated with manual operation.

[0021] 3. Uniform and stable torque output: The worm gear sections of the two drive shafts rotate in the same direction, driving the snap-fit ​​sleeve to rotate together, avoiding uneven load wear caused by uneven force on one side. This design ensures the smooth rotation of the snap-fit ​​sleeve and the uniformity of torque output, so that the nut is subjected to uniform force during tightening or loosening, improving installation quality and reliability.

[0022] 4. Meets diverse working conditions: In situations requiring both precise control of tightening torque and a certain number of rotations, this electric open-end wrench easily meets these needs thanks to its stable torque output and precise rotation control. Operators can adjust the power source output according to actual working conditions to achieve precise control of tightening torque and rotation count, improving work accuracy and flexibility.

[0023] 5. Easy to maintain and repair: The detachable and reassembleable structure of the enclosure makes the installation, maintenance, and repair of internal components more convenient. When a component malfunctions, operators can quickly disassemble the enclosure to replace or repair the faulty component, reducing maintenance and time costs.

[0024] In summary, this electric open-end wrench, through its unique working principle and structural design, demonstrates significant technical advantages in adapting to operation in confined spaces, improving work efficiency, ensuring uniform and stable torque output, meeting various working conditions, and facilitating maintenance and repair. It has broad market application prospects. Attached Figure Description

[0025] Figure 1 This is a top view of the present invention;

[0026] Figure 2 and Figure 3 This is a three-dimensional structural diagram of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of this utility model without the cover plate;

[0028] Figure 5 This is a schematic diagram of the internal three-dimensional structure of this utility model;

[0029] Figure 6 This is a schematic diagram of an open-type snap-fit ​​sleeve structure.

[0030] In the diagram: 1. Power rod; 11. Drive gear; 12. Input end; 2. Drive shaft; 21. Driven gear; 22. Worm section; 3. Open-type snap-fit ​​sleeve; 31. External gear; 32. Clamping surface; 33. Opening groove; 4. Housing; 401. Side plate; 402. Bottom plate; 403. Cover plate; 41. Operating port; 42. Shoulder; 43. Power rod support seat. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0032] Please see Figures 1 to 6 An electric open-end wrench includes: a housing 4, which is detachably assembled from a side plate 401, a bottom plate 402, and a cover plate 403, and an open operating port 41 is provided on its outer side plate;

[0033] The power rod 1 is rotatably mounted on the housing 4, with its input end extending outside the housing 4 and its output end extending into the housing 4 and equipped with a drive gear 11;

[0034] Two parallel drive shafts 2 are rotatably mounted inside the housing 4, located on both sides of the drive gear 11. Each drive shaft 2 is equipped with a driven gear 21 that meshes with the drive gear 11, and each drive shaft 2 has a worm section 22 at its end facing the operating port 41.

[0035] An open-type snap-fit ​​sleeve 3 is set between the worm gear sections 22 of the two drive shafts 2, and its axial position is restricted within the housing 4;

[0036] The outer circumference of the snap sleeve 3 is provided with external teeth 31, which mesh with the worm sections 22 of the two drive shafts 2 at the same time; the worm sections 22 of the two drive shafts 2 rotate in the same direction, ensuring that the two sides drive the snap sleeve 3 synchronously, avoiding uneven load wear caused by uneven force on one side, and improving rotational stability and torque output uniformity.

[0037] The inner wall of the snap-fit ​​sleeve 3 is provided with a clamping surface 32 for clamping the nut, and its side wall is provided with an opening groove 33 that extends to the end face; wherein, the operating port 41 is directly opposite the opening groove 33 of the snap-fit ​​sleeve 3, forming a channel for the nut to be radially snapped in.

[0038] The aforementioned power rod 1 synchronously drives the driven gears 21 on both sides through the driving gear 11, which in turn drives the worm gear sections 22 of the two transmission shafts 2 to rotate, thereby jointly driving the snap-fit ​​sleeve 3 to rotate.

[0039] The core technical feature of this electric open-end wrench lies in its ability to clamp and rotate the nut through the cooperation of a power rod, driving gear, driven gear, drive shaft, worm gear section, and locking sleeve. Specifically, when the power tool rotates the power rod, the driving gear synchronously drives the driven gears on both sides, which in turn rotates the worm gear sections of the two drive shafts. Since the external teeth of the locking sleeve simultaneously mesh with the worm gear sections of both drive shafts, the locking sleeve is driven to rotate as well. By controlling the forward and reverse rotation of the power tool, the nut can be loosened or pre-tightened. This design primarily solves the problem of traditional wrenches being difficult to use when operating space is limited or the nut is inconvenient to clamp directly. By setting the operating port and opening groove, the nut can be radially inserted into the locking sleeve, thus eliminating the need for axial clamping. Furthermore, the gear and worm gear transmission design allows the wrench to achieve a large torque output within a small space, enabling efficient and stable power transmission to the locking sleeve, thereby achieving the tightening or loosening of the nut. This improves the convenience and efficiency of operation.

[0040] More preferably, the housing 4 is provided with a shoulder 42 or a retaining ring to axially limit the snap-fit ​​sleeve 3. By limiting the axial displacement of the snap-fit ​​sleeve 3 with the shoulder 42 or retaining ring, the snap-fit ​​sleeve is prevented from falling off or shifting during operation, ensuring the stability of the nut clamping and avoiding the risk of clamping failure or nut slippage caused by axial movement.

[0041] More preferably, the shoulder is the outer toothed end face of the outer circumference of the snap-fit ​​sleeve 3. Integrating the shoulder 42 into the outer toothed end face of the snap-fit ​​sleeve simplifies the structure and reduces the number of parts. The limiting function is achieved by utilizing the end face of the outer tooth itself, which reduces costs while improving assembly compactness and reliability.

[0042] Preferably, the power rod and / or drive shaft 2 are mounted on the housing 4 via bearings. This significantly reduces rotational friction resistance, decreases wear, extends service life, and improves transmission efficiency, making wrench operation easier and torque transmission smoother.

[0043] More preferably, the clamping surface 32 is a polygonal inner wall surface or internal teeth. This increases the contact area and friction with the nut, prevents slippage, and is compatible with various nut specifications, such as square nuts and hexagonal nuts, improving versatility. When the clamping surface is internal teeth, the internal teeth have cutting edges. When the outer surface of the nut being disassembled is damaged, the internal teeth can form a certain engagement with the outer surface of the nut, thereby achieving nut disassembly.

[0044] Preferably, the input end 12 of the power lever 1 is provided with an interface for driving external power tools. This interface is designed with a hexagonal or square head, both common and practical shapes, which can perfectly adapt to the conventional output ends of general-purpose power tools (electric pistol drills) on the market. This electric open-end wrench uses these two interface types, allowing operators to easily connect to the input end 12 of the power lever 1 using readily available conventional power tools, such as electric screwdrivers or electric drills, without needing to equip themselves with a dedicated drive device.

[0045] Preferably, the housing 4 is provided with a power rod support seat 43, which is rotatably fitted with the output end of the power rod 1 to enhance the axial load-bearing stability of the power rod 1; the power rod support seat 43 is detachable or welded to the bottom of the housing; it has an embedded bearing, and the output end of the power rod 1 is assembled to the inner ring of the bearing to enhance the axial load-bearing capacity of the power rod 1, reduce vibration and deformation during rotation, and ensure structural stability under long-term high-load conditions.

[0046] This utility model of an electric open-end wrench is particularly suitable for use with power tools. Its power input end can be easily connected to a power tool, providing powerful rotational torque and further improving ease of operation and efficiency. It can be operated in confined spaces, controlling both tightening torque and rotational count requirements, while offering convenient and efficient operation.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electric open-end wrench, characterized in that, include: The box body (4) has an open operating port (41) on its outer side panel; The power rod (1) is rotatably mounted on the housing (4), with its input end extending outside the housing (4) and its output end extending into the housing (4) and equipped with a drive gear (11); Two parallel drive shafts (2) are rotatably installed inside the housing (4) and located on both sides of the drive gear (11). Each drive shaft (2) is equipped with a driven gear (21) that meshes with the drive gear (11), and each drive shaft (2) has a worm section (22) at the end facing the operating port (41). An open-type snap-fit ​​sleeve (3) is set between the worm gear sections (22) of the two drive shafts (2), and its axial position is restricted within the housing (4); The outer circumference of the snap sleeve (3) is provided with external teeth (31), which simultaneously mesh with the worm gear sections (22) of the two drive shafts (2); the worm gear sections (22) of the two drive shafts (2) have the same rotation direction; The inner wall of the snap-fit ​​sleeve (3) is provided with a clamping surface (32) for clamping the nut, and its side wall is provided with an opening groove (33) that extends to the end face; wherein, the operating port (41) is directly opposite the opening groove (33) of the snap-fit ​​sleeve (3), forming a channel for the nut to be radially inserted. The aforementioned power rod (1) synchronously drives the driven gears (21) on both sides through the driving gear (11), which in turn drives the worm gear sections (22) of the two transmission shafts (2) to rotate, thereby jointly driving the snap-fit ​​sleeve (3) to rotate.

2. The electric open-end wrench according to claim 1, characterized in that: The housing (4) is provided with a shoulder (42) or a retaining ring for axially limiting the snap-fit ​​sleeve (3).

3. The electric open-end wrench according to claim 2, characterized in that: The shoulder is the outer tooth end face of the outer circumference of the snap-fit ​​sleeve (3).

4. The electric open-end wrench according to claim 1, characterized in that: The power rod and / or drive shaft (2) are mounted on the housing (4) via bearings.

5. The electric open-end wrench according to claim 1, characterized in that: The clamping surface (32) is a polygonal inner wall surface or internal teeth.

6. The electric open-end wrench according to claim 1, characterized in that: The input end (12) of the power lever (1) is provided with an interface for driving external power tools.

7. The electric open-end wrench according to claim 6, characterized in that: The interface is either hexagonal or square-headed.

8. The electric open-end wrench according to claim 1, characterized in that: The housing (4) is provided with a power rod support seat (43), which is rotatably engaged with the output end of the power rod (1).

9. The electric open-end wrench according to claim 8, characterized in that: The power rod support (43) can be detached or welded to the bottom of the box.

10. The electric open-end wrench according to claim 8, characterized in that: The support base (43) is equipped with a bearing that rotates in conjunction with the power rod.

Images