Special electric device for narrow space

Abstract

The invention belongs to the technical field of electric tools, and particularly relates to a special electric device for a narrow space. Comprising an electric tool body and an operation tool installed on a locking head of the electric tool body. The operation tool comprises a driving rod, the connecting end of the driving rod is connected with a locking head of the electric tool machine body, a steering connector is installed at the operation end of the driving rod through a rotating joint, the steering connector comprises a first rod section coaxial with the driving rod and a second rod section forming an included angle with the driving rod, and a first operation part is fixed to the end of the first rod section. A rotatable second operation part is installed at the end of the second rod section, the second operation part is connected with the driving rod through a torque transmission assembly in the steering connector, a first locking assembly is arranged between the driving rod and the steering connector, and a second locking assembly is arranged between the steering connector and the electric tool machine body; according to the electric device, the function of a traditional electric tool is kept, and the requirement for screwing bolts at corners in a narrow space can be met.

Description

Technical Field

[0001] This invention belongs to the field of power tool technology, and specifically relates to a special electric device for confined spaces. Background Technology

[0002] In the electromechanical installation of subway projects, such as the electromechanical installation of Tianjin Metro Line 8, the various professional pipelines are relatively dense, and the elevation control of the pipelines is strict. In some areas, the ducts are installed close to the ceiling or are blocked by other pipelines above them, resulting in very narrow space for duct installation. In addition, some ducts are large in size and use flange connections, making the bolt installation on the ducts very inconvenient. Existing power tools, due to their single-head orientation, cannot quickly and smoothly install bolts in the narrow operating space, thus failing to meet the usage requirements of the narrow space in subway construction projects. Summary of the Invention

[0003] This invention aims to solve the problem that existing power tools have a fixed operating angle, which cannot meet the needs of use in corner spaces.

[0004] This invention provides the following technical solution: a dedicated electric device for confined spaces, comprising an electric tool body and a working tool mounted on a locking head of the electric tool body; the working tool includes a drive rod, the connecting end of which is connected to the locking head of the electric tool body; a steering joint is mounted on the working end of the drive rod via a rotary joint; the steering joint includes a first rod segment coaxial with the drive rod and a second rod segment at an angle to the drive rod; a first working part is fixed at the end of the first rod segment, and a rotatable second working part is mounted at the end of the second rod segment; the second working part is connected to the drive rod via a torque transmission component within the steering joint; a first locking component is provided between the drive rod and the steering joint, and a second locking component is provided between the steering joint and the electric tool body; when the first locking component is locked and the second locking component is disengaged, the steering joint rotates with the drive rod, causing the first working part to rotate; when the second locking component is locked and the first locking component is disengaged, the drive rod drives the second working part to rotate via the torque transmission component.

[0005] Furthermore, the first operating unit includes a first plug, and the second operating unit includes a second plug; It also includes a socket wrench with a socket that is adapted to a first plug and a second plug. The socket wrench has a first hole that runs horizontally through it, the first plug has a second hole that runs horizontally through it, and the second plug has a third hole that runs horizontally through it. The socket wrench engages with the first plug or the second plug through the socket, and the first hole aligns with the second hole or the third hole and a limiting bolt is inserted.

[0006] Furthermore, the torque transmission assembly includes a primary transmission shaft and a secondary transmission shaft; the primary transmission shaft is coaxially connected to the drive rod, the secondary transmission shaft is coaxially connected to the second working part, and the primary transmission shaft and the secondary transmission shaft are driven by a pair of meshing bevel gears.

[0007] Furthermore, the drive rod includes an inner rod and an outer tube connected by a socket joint. The inner rod is connected to the locking head of the power tool body, and the outer tube is connected to the steering joint. A guide groove is opened along the axial direction on the inner rod, and the slider on the outer tube is slidably nested in the guide groove. Positioning screw holes are distributed at intervals in the guide groove, and the positioning screw on the slider engages with the positioning screw holes to restrict the sliding of the outer tube.

[0008] Furthermore, a first locking hole is opened on the outer tube, and a second locking hole is opened on the first rod section of the steering joint. The first locking hole, the second locking hole, and the locking screw that is threaded into the first locking hole and the second locking hole constitute the first locking assembly.

[0009] Furthermore, the second locking assembly includes a first screw, a second screw, and a threaded sleeve; the first screw is fixedly connected to the steering joint, the second screw is fixedly connected to the power tool body, the threads of the first screw and the second screw have opposite directions, and the left-hand threaded section and the right-hand threaded section of the threaded sleeve are respectively screwed into the first screw and the second screw.

[0010] Furthermore, the included angle between the first and second segments of the steering joint is 90°.

[0011] Compared with the prior art, the advantages of the present invention are: This invention provides a dedicated electric device for confined spaces. By switching the locking and unlocking states of the first locking component and the second locking component, the torque output from the power tool body drives the entire steering joint to rotate, thereby putting the first working part on the steering joint into a working state; or the torque output from the power tool body drives the second working part on the steering joint to rotate, putting the second working part into a working state. The working directions of the first and second working parts are perpendicular to each other, and the switching is based on the position of the bolts on the air duct, allowing for flexible tightening of bolts in different positions in confined spaces. Attached Figure Description

[0012] Figure 1 A schematic diagram of a dedicated electric device for confined spaces; Figure 2 This is a schematic diagram of the drive lever and steering joint; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the steering joint.

[0013] In the diagram: 1-Power tool body; 1.1-Locking head; 2-Swivel joint; 2.1-First rod segment; 2.2-Second rod segment; 3-First plug; 4-Second plug; 5-Socket wrench; 5.1-Socket; 6-Limit bolt; 7-First-stage drive shaft; 8-Second-stage drive shaft; 9-Bevel gear; 10-Inner rod; 10.1-Guide groove; 10.2-Positioning screw hole; 11-Outer tube; 11.1-Slider; 11.2-Positioning screw; 12-Locking screw; 13-First screw; 14-Second screw; 15-Threaded sleeve. Detailed Implementation

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] like Figure 1 , Figure 2 As shown: A special electric device for confined spaces includes an electric tool body 1 and a working tool mounted on a locking head 1.1 of the electric tool body 1; the electric tool body 1 is a commercially available ordinary electric tool; the working tool includes a drive rod, the connecting end of which is connected to the locking head 1.1 of the electric tool body 1; a steering joint 2 is mounted on the working end of the drive rod via a rotary joint; the steering joint 2 includes a first rod segment 2.1 coaxial with the drive rod and a second rod segment 2.2 at an angle to the drive rod; a first working part is fixed to the end of the first rod segment 2.1, and a rotatable second working part is mounted to the end of the second rod segment 2.2; the second working part is connected to the drive rod. The drive rod is connected to the steering joint 2 via a torque transmission assembly. A first locking assembly is provided between the drive rod and the steering joint 2, and a second locking assembly is provided between the steering joint 2 and the power tool body 1. When the first locking assembly is locked and the second locking assembly is disengaged, the drive rod is fixed together with the steering joint 2, and the steering joint 2 is separated from the power tool body 1. The steering joint 2 rotates with the drive rod, causing the first working part to rotate. When the second locking assembly is locked and the first locking assembly is disengaged, the drive rod can rotate freely in the steering joint 2. The drive rod is fixed relative to the power tool body 1, and the drive rod drives the second working part to rotate through the torque transmission assembly in the steering joint 2.

[0016] The angle between the first segment 2.1 and the second segment 2.2 of the steering joint 2 is 90°, which maintains the function of traditional power tools and meets the needs of tightening bolts at corners in narrow spaces.

[0017] The first working part includes a first plug 3, and the second working part includes a second plug 4; the first plug 3 is fixed on the steering joint 2, and the second plug 4 is rotatably mounted on the steering joint 2. A bearing is provided between the second plug 4 and the steering joint 2 to enable rotation, and retaining rings are provided on both sides of the bearing as an anti-detachment structure.

[0018] like Figure 4 As shown: It also includes a socket wrench 5, which has a socket 5.1 adapted to the first plug 3 and the second plug 4. The first plug 3 and the second plug 4 are provided with keys, and the socket 5.1 is provided with corresponding keyways. The keys on the first plug 3 and the second plug 4 cooperate with the keyways in the socket 5.1 to realize torque transmission. Other torque transmission methods can also be used between the first plug 3 and the second plug 4 and the socket 5.1, such as the cooperation of a polygonal prism and a polygonal hole. The socket wrench 5 has a first hole that runs horizontally through it, the first plug 3 has a second hole that runs horizontally through it, and the second plug 4 has a third hole that runs horizontally through it. The socket wrench 5 is engaged with the first plug 3 or the second plug 4 through the socket 5.1. The first hole is aligned with the second hole or the third hole and a limiting bolt 6 is inserted. The limiting bolt 6 prevents the socket wrench 5 from falling off the first plug 3 or the second plug 4.

[0019] Select the socket wrench 5 to be inserted into the first plug 3 or the second plug 4 according to the working status of the first and second work departments. Different sizes of socket wrenches 5 are provided to meet the installation of different types of bolts. The sockets 5.1 of different sizes of socket wrenches 5 are the same size.

[0020] The torque transmission assembly includes a primary transmission shaft 7 and a secondary transmission shaft 8. The primary transmission shaft 7 is coaxially connected to the drive rod, and the secondary transmission shaft 8 is coaxially connected to the second working part. The primary transmission shaft 7 and the secondary transmission shaft 8 are driven by a pair of meshing bevel gears 9. The drive rod drives the primary transmission shaft 7 to rotate, and the primary transmission shaft 7 drives the secondary transmission shaft 8 to rotate through the bevel gears 9. The second working part rotates with the secondary transmission shaft 8.

[0021] like Figure 2 , Figure 3 As shown: The length of the drive rod is adjustable. The drive rod includes an inner rod 10 and an outer tube 11 connected by a socket. The inner rod 10 is connected to the locking head 1.1 of the power tool body 1, and the outer tube 11 is connected to the steering joint 2. A bearing is installed between the outer tube 11 and the steering joint 2 to enable rotation. Retaining rings are installed on both sides of the bearing as an anti-disengagement structure. A guide groove 10.1 is opened along the axial direction on the inner rod 10. The slider 11.1 on the outer tube 11 is slidably nested in the guide groove 10.1. The slider 11.1 cooperates with the guide groove 10.1 to maintain torque transmission when the outer tube 11 slides relative to the inner rod 10. Positioning screw holes 10.2 are distributed at intervals in the guide groove 10.1. The positioning screws 11.2 on the slider 11.1 engage with the positioning screw holes 10.2 to restrict the sliding of the outer tube 11.

[0022] The outer tube 11 has a first locking hole, and the first rod segment 2.1 of the steering joint 2 has a second locking hole. The first locking hole, the second locking hole, and the locking screw 12 that is threaded into the first locking hole and the second locking hole constitute the first locking assembly. When the locking screw 12 is screwed out of the first locking hole, the first locking assembly is disengaged, and the outer tube 11 can rotate freely in the steering joint 2. When the locking screw 12 is screwed into the first locking hole, the first locking assembly is locked.

[0023] like Figure 1 As shown: The second locking assembly includes a first screw 13, a second screw 14, and a threaded sleeve 15. The first screw 13 is fixedly connected to the steering joint 2, and the second screw 14 is fixedly connected to the power tool body 1. The threads of the first screw 13 and the second screw 14 have opposite directions of rotation. The left-hand threaded section and the right-hand threaded section of the threaded sleeve 15 engage with the first screw 13 and the second screw 14, respectively. When the drive rod extends or retracts, rotating the threaded sleeve 15 increases or decreases the engagement length between the first screw 13, the second screw 14, and the threaded sleeve 15. When the threaded sleeve 15 is removed, the second locking assembly is disengaged. When removing the threaded sleeve 15, first separate the positioning screw 11.2 from the positioning screw hole 10.2, allowing the outer tube 11 to move freely on the inner rod 10.

[0024] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A special electric device for confined spaces, comprising an electric tool body (1) and a working tool mounted on a locking head (1.1) of the electric tool body (1); characterized in that: The working tool includes a drive rod, the connecting end of which is connected to the locking head (1.1) of the power tool body (1). A steering joint (2) is installed on the working end of the drive rod via a rotary joint. The steering joint (2) includes a first rod segment (2.1) coaxial with the drive rod and a second rod segment (2.2) at an angle to the drive rod. The end of the first rod segment (2.1) is fixed with a first working part, and the end of the second rod segment (2.2) is equipped with a rotatable second working part. The second working part is connected to the drive rod via a torque transmission component inside the steering joint (2). A first locking component is provided between the drive rod and the steering joint (2), and a second locking component is provided between the steering joint (2) and the power tool body (1). When the first locking component is locked and the second locking component is open, the steering joint (2) rotates with the drive rod, causing the first working part to rotate. When the second locking component is locked and the first locking component is open, the drive rod drives the second working part to rotate via the torque transmission component.

2. The electric device for confined spaces according to claim 1, characterized in that: The first working part includes a first plug (3), and the second working part includes a second plug (4). It also includes a socket wrench (5), which has a socket (5.1) adapted to the first plug (3) and the second plug (4). The socket wrench (5) has a first hole that passes through laterally, the first plug (3) has a second hole that passes through laterally, and the second plug (4) has a third hole that passes through laterally. The socket wrench (5) engages with the first plug (3) or the second plug (4) through the socket (5.1). The first hole aligns with the second hole or the third hole and a limiting bolt (6) is inserted.

3. The electric device for confined spaces according to claim 2, characterized in that: The torque transmission assembly includes a primary transmission shaft (7) and a secondary transmission shaft (8); the primary transmission shaft (7) is coaxially connected to the drive rod, the secondary transmission shaft (8) is coaxially connected to the second working part, and the primary transmission shaft (7) and the secondary transmission shaft (8) are driven by a pair of meshing bevel gears (9).

4. A special electric device for confined spaces according to any one of claims 1 to 3, characterized in that: The drive rod includes an inner rod (10) and an outer tube (11) connected by a socket. The inner rod (10) is connected to the locking head (1.1) of the power tool body (1), and the outer tube (11) is connected to the steering joint (2). The inner rod (10) has a guide groove (10.1) along the axial direction. The slider (11.1) on the outer tube (11) is slidably nested in the guide groove (10.1). The guide groove (10.1) has positioning screw holes (10.2) distributed at intervals. The positioning screw (11.2) on the slider (11.1) engages with the positioning screw hole (10.2) to restrict the sliding of the outer tube (11).

5. The electric device for confined spaces according to claim 4, characterized in that: The outer tube (11) has a first locking hole, and the first rod section (2.1) of the steering joint (2) has a second locking hole. The first locking hole, the second locking hole, and the locking screw (12) that is threaded into the first locking hole and the second locking hole constitute the first locking assembly.

6. The electric device for confined spaces according to claim 4, characterized in that: The second locking assembly includes a first screw (13), a second screw (14), and a threaded sleeve (15); the first screw (13) is fixedly connected to the steering joint (2), the second screw (14) is fixedly connected to the power tool body (1), the threads of the first screw (13) and the second screw (14) are opposite in direction, and the left-hand threaded section and the right-hand threaded section of the threaded sleeve (15) are respectively screwed into the first screw (13) and the second screw (14).

7. The electric device for confined spaces according to claim 1, characterized in that: The angle between the first segment (2.1) and the second segment (2.2) of the steering joint (2) is 90°.

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