Electric wrench

Abstract

The utility model belongs to the technical field of disassembly and assembly tools, and particularly relates to an electric wrench which comprises a wrench body, an open gear, a driving assembly and a reverse torque wrench. The wrench main body is provided with an imbedding opening communicated with the cavity of the wrench main body; an opening in the open gear communicates with an inner ring of the open gear to form a first jaw, and the open gear is rotationally arranged in the cavity. The driving assembly is in transmission connection with the opening gear; a second jaw is arranged on the reverse torque wrench, the reverse torque wrench is arranged outside the wrench body, and the opening direction of the second jaw is the same as the opening direction of the placing opening. According to the electric wrench, a first jaw on an open gear and a second jaw on a reverse torque wrench can be clamped on a screw head and / or a nut connected to a pipeline respectively, and the open gear can be driven by a driving assembly to rotate, so that the screw head and the nut connected to the pipeline rotate relatively, and the screw head and the nut are tightened or loosened; disassembly and assembly of the screw head and / or the nut can be rapidly completed, and therefore the maintenance efficiency of a pipeline is improved.

Description

Technical Field

[0001] This application belongs to the field of disassembly and assembly tool technology, specifically relating to an electric wrench. Background Technology

[0002] In piping systems, small-diameter (DN) pipes are mostly connected by using a screw and nut. That is, matching screws and nuts are installed at the ends of the two pipes, and the connection between the screws and nuts on the two pipes is achieved, ensuring that there is no leakage of medium at the connection point.

[0003] Currently, for pipeline installation and maintenance, workers commonly use forked wrenches to turn screws and / or nuts to install and remove pipelines. However, in confined spaces, especially in densely packed pipeline systems, the limited space makes it difficult for the forked wrench to reach the screws and / or nuts. Alternatively, the wrench may encounter resistance after turning at a certain angle, requiring the screw / nut to be removed and the angle readjusted before further turning. This low efficiency increases maintenance time. Therefore, inventing a wrench that allows for easy turning of screws and nuts in confined spaces is a pressing technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] To address the aforementioned technical problems, this application provides an electric wrench to solve the technical problem that existing fork wrenches are difficult to operate in confined spaces to turn screw heads and / or nuts on pipelines, resulting in a significant reduction in pipeline maintenance efficiency.

[0005] The technical solution adopted to achieve the purpose of this application is as follows:

[0006] An electric wrench comprising:

[0007] The wrench body is a box-shaped structure with an internal cavity, and one end of the wrench body has an inlet communicating with the cavity;

[0008] An open gear, wherein the open gear has a ring structure, the opening on the open gear is connected to the inner ring of the open gear to form a first jaw, the shape of the inner ring of the open gear matches the shape of the side wall of the screw head or nut to be disassembled or assembled, the open gear is rotatably disposed in the cavity, and the axis of the open gear coincides with the central axis of the insertion port;

[0009] A drive assembly is disposed on the wrench body, and the actuating end of the drive assembly is connected to the open gear transmission.

[0010] A reverse torque wrench, wherein the reverse torque wrench is provided with a second jaw, the reverse torque wrench is detachably disposed on the outside of the wrench body, the opening orientation of the second jaw is the same as the opening orientation of the insertion port, and the central axis of the second jaw coincides with the central axis of the insertion port;

[0011] When the opening orientation of the first jaw is consistent with the opening orientation of the insertion port, the screw head and nut of the connecting pipe can be respectively inserted into the first jaw and the second jaw, and the opening gear is driven by the drive component to rotate to tighten or loosen the screw head and nut.

[0012] To better realize this application, the above structure is further optimized. The wrench body is provided with a plug-in part for installing the anti-torque wrench. The plug-in part is provided with a slot, and the fixed end of the anti-torque wrench is detachably inserted into the slot.

[0013] To better realize this application, the above structure is further optimized. The two opposite sides of the plug part are provided with a first through hole that connects to the slot. A pin is detachably provided at the first through hole. The fixed end of the anti-torque wrench is provided with a second through hole corresponding to the position of the first through hole. The pin can pass through the second through hole to fix the anti-torque wrench.

[0014] To better realize this application, the above structure is further optimized, and the wrench body is a long, box-shaped structure that is easy to grip.

[0015] To better realize this application, the above structure is further optimized, and the wrench body includes a box and a cover plate;

[0016] The cavity is disposed in the box body, and the top of the box body is provided with a disassembly port communicating with the cavity, and the cover plate is detachably closed on the disassembly port.

[0017] To better realize this application, the above structure is further optimized, and the drive component includes a drive motor and a drive gear;

[0018] The drive gear is rotatably disposed in the cavity, and the drive motor is connected to the open gear through the drive gear.

[0019] To better realize this application, the above structure is further optimized. A drive shaft is rotatably disposed in the cavity, and the drive gear is interference-fitted onto the drive shaft. A connecting post is coaxially disposed at the connecting end of the drive shaft. The cross-sectional shape of the connecting post is a regular polygon, and the connecting post extends to the outside of the wrench body. The actuating end of the drive motor is coaxially disposed with a connecting groove that matches the connecting post. The drive motor is connected to the drive shaft through the engagement of the connecting groove and the connecting post.

[0020] To better realize this application, the above structure is further optimized by providing friction-reducing pads on the contact surface between the drive shaft and the cavity wall.

[0021] To better realize this application, the above structure is further optimized by rotatably arranging two sets of driven gears in the cavity;

[0022] The distance between the axes of the two sets of driven gears is greater than the width of the opening on the open gear, and both sets of driven gears mesh with the open gear. The driving gear is connected to the two sets of driven gears in a transmission manner.

[0023] To better realize this application, the above structure is further optimized by adding a power regulator for adjusting the output torque of the drive motor, and the drive motor is electrically connected to a power source through the power regulator.

[0024] As can be seen from the above technical solution, the first jaw on the open gear of the electric wrench provided in this application and the second jaw on the anti-torque wrench can be respectively engaged on the screw head and / or nut connected to the pipeline. The open gear can rotate under the drive of the drive component, so that the screw head and nut connected to the pipeline can rotate relative to each other, thereby tightening or loosening the screw head and nut, so as to quickly complete the disassembly and assembly of the screw head and / or nut. In addition, the wrench body does not need to rotate around the axis of the pipeline during the whole process, and can be quickly disassembled and assembled even in a narrow space, thereby improving the maintenance efficiency of the pipeline. Attached Figure Description

[0025] Figure 1 This application provides a structural schematic diagram of an electric wrench;

[0026] Figure 2 An internal structural view (without cover plate) of an electric wrench provided for this application;

[0027] Figure 3 This application provides a structural schematic diagram of the main body of a middle wrench in an electric wrench.

[0028] Figure 4 An exploded view of the anti-torque wrench and the insertion part of an electric wrench provided in this application;

[0029] Figure 5 This application provides a schematic diagram of the structure of an open-end gear in an electric wrench;

[0030] Figure 6 This application provides a schematic diagram of the structure of the drive shaft of an electric wrench;

[0031] Figure 7 A state diagram of an electric wrench in its initial state provided in this application;

[0032] Figure 8 This application provides a diagram showing the state of an electric wrench with the opening of the open gear facing one of the driven gears.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Wrench body, 11-Inlet, 12-Box, 13-Cover plate, 14-Plug-in part, 141-Slot, 142-Pin, 143-First through hole;

[0035] 2-Open gear, 21-First jaw;

[0036] 3-Drive assembly, 31-Drive motor, 32-Driving gear, 33-Driving shaft, 331-Connecting column, 34-Driven gear;

[0037] 4-Reverse torque wrench, 41-Second jaws, 42-Second through hole. Detailed Implementation

[0038] To enable those skilled in the art to better understand this application, the technical solution of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] In the embodiments of this application, such as Figures 1 to 8 As shown, an electric wrench includes a wrench body 1, an open-end gear 2, a drive assembly 3, and a counter-torque wrench 4; wherein,

[0040] The wrench body 1 is a box-shaped structure with an internal cavity. In this embodiment, the wrench body 1 is a long, narrow box-shaped structure to make it more convenient for the user to grip. One end of the wrench body 1 has an insertion port 11 that communicates with the cavity. See [reference needed]. Figure 7 ;

[0041] The open gear 2 has a ring-shaped structure, and the opening on the open gear 2 communicates with the inner ring of the open gear 2 to form the first jaw 21. See [link / reference]. Figure 2 and Figure 5The shape formed by the inner ring of the open gear 2 matches the shape formed by the side wall of the screw head or nut to be disassembled. The open gear 2 is rotatably set in the cavity, and the axis of the open gear 2 coincides with the central axis of the inlet 11.

[0042] The drive assembly 3 is mounted on the wrench body 1, and the actuating end of the drive assembly 3 is connected to the open gear 2 for transmission. See [link / reference]. Figure 1 and Figure 2 , used to drive the open gear 2 to rotate around its axis;

[0043] The anti-torque wrench 4 is provided with a second jaw 41. The anti-torque wrench 4 is detachably mounted on the outside of the wrench body 1. The opening orientation of the second jaw 41 is the same as the opening orientation of the insertion port 11. (See [reference]) Figure 1 Furthermore, the central axis of the second jaw 41 coincides with the central axis of the insertion port 11.

[0044] When using this electric wrench, the user can insert the pipe into the inlet 11 and engage the screw head and / or nut that need to be removed or installed in the pipe into the first jaw 21 and the second jaw 41 respectively. Then, the drive assembly 3 can be activated to drive the open gear 2 to rotate, thereby turning the screw head or nut engaged in the first jaw 21. The nut or screw head engaged in the second jaw 41 is fixed by the anti-torque wrench 4, causing the screw head and / or nut that need to be removed or installed to rotate relative to each other, thereby quickly completing the connection and / or disconnection of the pipe and improving the maintenance efficiency of the pipe.

[0045] Furthermore, when tightening screws and / or nuts, the wrench body 1 does not need to rotate around the axis of the pipeline, making it easy to disassemble and detach connected screws and nuts even in confined spaces. It is also suitable for pipeline systems with dense pipeline layouts.

[0046] It should be noted that, in order to ensure that the screw head and / or nut on the pipeline can be smoothly engaged in the first jaw 21, or to allow the pipeline stuck in the first jaw 21 to be disengaged from the first jaw 21, the opening orientation of the first jaw 21 must be consistent with the opening orientation of the insertion port 11 (the initial position of the opening gear 2 in its working state). See [reference needed]. Figure 2 and Figure 7 ;

[0047] Before use, the user needs to adjust the position of the first jaw 21 on the open gear 2 manually or by driving the drive component 3, so that the open gear 2 rotates to its initial position in working state, so that the pipeline can be inserted into the first jaw 21 after passing through the inlet 11. Then, the wrench body 1 is moved along the axis of the pipeline so that the screw head and / or nut on the pipeline can be inserted into the first jaw 21 and the second jaw 41 respectively.

[0048] After tightening the screw head and / or nut, the user can move the wrench body 1 along the axis of the pipeline to disengage the screw head and / or nut from the axis of the first jaw 21. Then, by jogging the open gear 2 through the drive component 3, i.e., fine-tuning the position of the open gear 2, the open gear 2 is rotated to its initial position in the working state, so that the pipeline can be disengaged from the electric wrench through the first jaw 21 and the insertion port 11.

[0049] It is worth noting that there are related electric wrenches in the existing technology (without a counter-torque wrench 4), but when connecting and disconnecting pipelines, the screws and nuts connected to each other on the pipeline may rotate synchronously due to the friction between the screws and nuts, which makes it impossible to achieve the required tightening torque or separate the connected screws and nuts. Other tools can only be used in conjunction with these tools.

[0050] In confined spaces, especially in densely packed pipe systems, tools used with electric wrenches are difficult to reach into the confined space, resulting in existing electric wrenches also suffering from the low disassembly and assembly efficiency problem mentioned in the background art.

[0051] The electric wrench provided in this application has a counter-torque wrench 4 on the wrench body 1. Through the cooperation of the open gear 2 and the counter-torque wrench 4, the screws and nuts connected to each other on the pipeline in a narrow space can be quickly installed and disassembled, thereby improving the maintenance efficiency of the pipeline and effectively solving the technical problem of low maintenance efficiency of pipeline in a narrow space mentioned in the background art.

[0052] In some embodiments, the end face of the open gear 2 is provided with an annular groove, see [reference]. Figure 5 The axis of the annular groove coincides with the axis of the open gear 2;

[0053] Multiple protrusions are provided in the cavity of the wrench body 1. The cross-section of each protrusion is arc-shaped, and the radius of the protrusion is equal to the radius of the annular groove. (See [reference]). Figure 3 The ring line formed by the arrangement of multiple protrusions matches the annular groove, and the open gear 2 is rotatably set in the cavity through the cooperation of the annular groove and the protrusion.

[0054] In some embodiments, the wrench body 1 described above is provided with a plug portion 14 for mounting a counter-torque wrench 4, see [link to previous document]. Figure 1The insertion part 14 is located at the bottom of the wrench body 1, and a slot 141 is provided on the insertion part 14. The opening of the slot 141 is located on the side of the insertion part 14 away from the wrench body 1. The fixed end of the anti-torque wrench 4 is detachably inserted into the slot 141. Preferably, the anti-torque wrench 4 has an "L"-shaped plate structure; when the fixed end of the anti-torque wrench 4 is inserted into the slot 141, the plane of the main body of the anti-torque wrench 4 is parallel to the plane of the wrench body 1.

[0055] In some embodiments, the aforementioned plug-in portion 14 has first through holes 143 on both opposite sides of the communicating slot 141, see [reference]. Figure 4 A pin 142 is detachably provided at the first through hole 143, and the two ends of the pin 142 are respectively locked in the first through holes 143 on opposite sides of the plug part 14.

[0056] When the anti-torque wrench 4 is inserted into the slot 141, the fixed end of the anti-torque wrench 4 has a second through hole 42 corresponding to the position of the first through hole 143. The pin 142 passes through the second through hole 42 to limit and fix the anti-torque wrench 4. When it is necessary to remove the anti-torque wrench 4, the pin 142 can be removed, the restriction of the insertion part 14 on the anti-torque wrench 4 is removed, and the user can remove the anti-torque wrench 4. This setting allows the electric wrench to replace the anti-torque wrench 4 according to the size of the screw head and / or nut to be removed, so as to broaden the application range of the electric wrench.

[0057] Of course, in order to accommodate the installation and removal of various sizes of screw heads and / or nuts, the aforementioned open gear 2 also needs to be equipped with various sizes. Here, the size refers to the opening width of the first jaw 21 on the open gear 2, not the diameter of the open gear 2.

[0058] To facilitate the quick replacement of the open gear 2, in some embodiments, the wrench body 1 includes a housing 12 and a cover plate 13; wherein,

[0059] The cavity is provided in the box body 12, and the top of the box body 12 is provided with a disassembly port communicating with the cavity. The cover plate 13 is detachably closed on the disassembly port.

[0060] When it is necessary to replace the open gear 2, the user can remove the cover plate 13 from the box 12 and then replace the open gear 2. After the replacement is completed, the cover plate 13 should be closed at the disassembly port to prevent the open gear 2 or other parts in the box 12 from coming out.

[0061] In some embodiments, the drive component 3 described above includes a drive motor 31 and a drive gear 32, see [link to previous document]. Figure 2 , Figure 7 and Figure 8 ;in,

[0062] The drive gear 32 is rotatably disposed in the cavity, and the drive motor 31 is connected to the open gear 2 via the drive gear 32. In this embodiment, the drive assembly 3 also includes a power regulator, and the drive motor 31 is electrically connected to the power supply via the power regulator; the power regulator can adjust the torque output by the drive motor 31, so that the electric wrench can output a suitable torque according to the assembly requirements of the screw head and / or nut, thereby ensuring the connection quality of the pipeline.

[0063] It should be noted that adjusting the output torque of a motor through a power regulator is a common and conventional technique in the existing technology and is relatively simple for those skilled in the art, so it will not be described in detail here.

[0064] In some embodiments, a drive shaft 33 is rotatably disposed in the cavity described above, and a drive gear 32 is interference-fitted onto the drive shaft 33. A connecting post 331 is coaxially disposed at the connecting end of the drive shaft 33. The cross-sectional shape of the connecting post 331 is a regular polygon. In this embodiment, the cross-sectional shape of the connecting post 331 is a square. See [reference needed]. Figure 6 The connecting post 331 extends to the outside of the wrench body 1;

[0065] The drive motor 31 has a connecting groove coaxially provided at its actuating end, which matches the connecting post 331. The drive motor 31 is connected to the connecting post 331 through the connecting groove to drive the drive shaft 33 to rotate. This avoids relative rotation between the drive motor 31 and the drive shaft 33, thus ensuring the stability of the electric wrench's working state.

[0066] In some embodiments, a friction-reducing plate (not shown in the figure) is provided at the connection between the drive shaft 33 and the cavity wall to reduce the friction between the drive shaft 33 and the wrench body 1, thereby reducing the attenuation of the output torque of the drive motor 31.

[0067] In some embodiments, the aforementioned reduction gear set includes two sets of driven gears 34, see again. Figure 2 , Figure 7 and Figure 8 ;in,

[0068] The distance between the axes of the two sets of driven gears 34 is greater than the width of the opening on the open gear 2, and both sets of driven gears 34 mesh with the open gear 2. The aforementioned driving gear 32 is connected to the two sets of driven gears 34 in a transmission connection.

[0069] During the rotation of the open gear 2, the opening on the open gear 2 will pass through two sets of driven gears 34 in sequence; and when the opening of the open gear 2 faces one of the sets of driven gears 34, such as Figure 8As shown, the driven gear 34 at the opening of the open gear 2 no longer meshes with the open gear 2, and therefore no longer transmits power. The other set of driven gears 34 (the driven gears 34 not at the opening of the open gear 2) can output power, causing the open gear 2 to rotate continuously. Since the distance between the axes of the two sets of driven gears 34 is greater than the width of the opening on the open gear 2, the opening on the open gear 2 will not face both sets of driven gears 34 at the same time, so there will be no situation where power cannot be transmitted. Thus, the entire working process of the electric wrench will not have the open gear 2 jamming or stopping, making the working state of the electric wrench smoother and more stable.

[0070] Through the above embodiments, this application has the following beneficial effects or advantages:

[0071] 1) The first jaw 21 on the open gear 2 and the second jaw 41 on the anti-torque wrench 4 of the electric wrench can be respectively engaged on the screw head and / or nut connected to the pipeline. The open gear 2 can rotate under the drive of the drive component 3 so that the screw head and nut connected to the pipeline can rotate relative to each other, so as to quickly complete the disassembly and assembly of the screw head and / or nut. In the whole process, the wrench body 1 does not need to rotate around the axis of the pipeline, and can be quickly disassembled and assembled even in a narrow space, thereby improving the maintenance efficiency of the pipeline.

[0072] 2) The anti-torque wrench 4 in the electric wrench is detachably connected to the slot 141 via the pin 142, so that the anti-torque wrench 4 can be replaced according to the size of the screw head and / or nut, thereby making the electric wrench more widely applicable.

[0073] 3) The drive assembly 3 of the electric wrench also includes a power regulator, which can adjust the torque output of the drive motor 31 so that the electric wrench can adjust the output torque according to the assembly requirements of the screw head and / or nut, thereby ensuring the connection quality of the pipeline.

[0074] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0075] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An electric wrench, characterized in that, include: The wrench body (1) is a box-shaped structure with an internal cavity, and one end of the wrench body (1) is provided with an inlet (11) communicating with the cavity; An open gear (2) is a ring structure. The opening on the open gear (2) is connected to the inner ring of the open gear (2) to form a first jaw (21). The shape formed by the inner ring of the open gear (2) matches the shape formed by the side wall of the screw head or nut to be disassembled. The open gear (2) is rotatably disposed in the cavity, and the axis of the open gear (2) coincides with the central axis of the insertion port (11). A drive assembly (3) is disposed on the wrench body (1), and the actuating end of the drive assembly (3) is connected to the open gear (2) for transmission. A reverse torque wrench (4) is provided with a second jaw (41). The reverse torque wrench (4) is detachably disposed outside the wrench body (1). The opening orientation of the second jaw (41) is the same as the opening orientation of the insertion port (11), and the central axis of the second jaw (41) coincides with the central axis of the insertion port (11). When the opening orientation of the first jaw (21) is consistent with the opening orientation of the insertion port (11), the screw head and nut of the connecting pipe can be respectively inserted into the first jaw (21) and the second jaw (41), and the opening gear (2) is driven by the drive component (3) to rotate to tighten or loosen the screw head and nut.

2. The electric wrench according to claim 1, characterized in that, The wrench body (1) is provided with a plug-in part (14) for installing the anti-torque wrench (4), and the plug-in part (14) is provided with a slot (141), and the fixed end of the anti-torque wrench (4) is detachably inserted into the slot (141).

3. The electric wrench according to claim 2, characterized in that, The plug-in part (14) has a first through hole (143) on each side of the opposite side, which is connected to the slot (141). A pin (142) is detachably provided at the first through hole (143). The fixed end of the anti-torque wrench (4) is provided with a second through hole (42) corresponding to the position of the first through hole (143). The pin (142) can pass through the second through hole (42) to fix the anti-torque wrench (4).

4. The electric wrench according to claim 1, characterized in that, The main body (1) of the wrench is a long, box-shaped structure that is easy to grip.

5. The electric wrench according to claim 4, characterized in that, The wrench body (1) includes a housing (12) and a cover plate (13); The cavity is disposed in the box body (12), and the top of the box body (12) is provided with a disassembly port communicating with the cavity, and the cover plate (13) is detachably closed on the disassembly port.

6. The electric wrench according to claim 1, characterized in that, The drive assembly (3) includes a drive motor (31) and a drive gear (32); The drive gear (32) is rotatably disposed in the cavity, and the drive motor (31) is connected to the open gear (2) through the drive gear (32).

7. The electric wrench according to claim 6, characterized in that, A drive shaft (33) is rotatably disposed in the cavity. The drive gear (32) is interference-fitted onto the drive shaft (33). A connecting post (331) is coaxially disposed at the connecting end of the drive shaft (33). The cross-sectional shape of the connecting post (331) is a regular polygon. The connecting post (331) extends to the outside of the wrench body (1). The actuating end of the drive motor (31) is coaxially disposed with a connecting groove that matches the connecting post (331). The drive motor (31) is connected to the drive shaft (33) through the engagement of the connecting groove and the connecting post (331).

8. The electric wrench according to claim 7, characterized in that, The contact surface between the drive shaft (33) and the cavity wall is provided with friction-reducing pads.

9. The electric wrench according to claim 6, characterized in that, Two sets of driven gears (34) are rotatably arranged in the cavity; The distance between the axes of the two sets of driven gears (34) is greater than the width of the opening on the open gear (2), and both sets of driven gears (34) mesh with the open gear (2), and the driving gear (32) is connected to the two sets of driven gears (34) in a transmission connection.

10. The electric wrench according to claim 9, characterized in that, The drive assembly (3) also includes a power regulator for adjusting the output torque of the drive motor (31), and the drive motor (31) is electrically connected to a power source through the power regulator.

Images