A bolt fastening device suitable for use in a confined space

Abstract

The application provides a bolt fastening device suitable for narrow space, which comprises a supporting base, a telescopic handle and a worm gear reducer are arranged on the supporting base, a bolt fixing seat is arranged on the worm gear reducer, an output shaft of the worm gear reducer is connected with a working rotating arm, the other end of the working rotating arm is slidably connected with a nut supporting arm, a nut fixing seat is arranged on the nut supporting arm, and the nut fixing seat is arranged opposite to the bolt fixing seat. The application can solve the problem that the construction personnel cannot use conventional fastening tools to fasten and connect due to narrow operation space, such as the connection of the flange bolt of the air pipe close to the wall in the building mechanical and electrical construction, improve the tightness of the pipeline connection, improve the work efficiency, and can adapt to bolts and nuts of different specifications.

Description

Technical Field

[0001] This invention relates to the field of bolt fastening technology, specifically a bolt fastening device suitable for confined spaces. Background Technology

[0002] In building electromechanical engineering construction, especially in the air conditioning and ventilation duct systems of large buildings, due to the influence of building structural design, many ducts are installed close to walls and floors, resulting in insufficient space between the ducts and the wall panels. Connections between duct sections require tightening flange bolts to ensure a tight connection and reduce air leakage. The narrow installation space prevents workers from reaching their hands and tools into the operating area. Conventional tools, such as socket wrenches and torque wrenches, require a certain amount of operating space to turn by hand, but due to space limitations, tightening operations cannot usually be completed effectively and quickly. Furthermore, insufficient on-site lighting and the worker's position prevent direct observation of the real-time situation in the operating area. Summary of the Invention

[0003] In view of the above-mentioned prior art, the present invention proposes a bolt fastening device suitable for narrow spaces.

[0004] The present invention provides a bolt fastening device suitable for narrow spaces, comprising a support base, a retractable handle and a worm gear reducer on the support base, a bolt fixing seat on the worm gear reducer, an output shaft of the worm gear reducer connected to a working arm, the other end of the working arm being slidably connected to a nut support arm, and a nut fixing seat on the nut support arm, the nut fixing seat being arranged opposite to the bolt fixing seat.

[0005] Preferably, the support base is configured as a C-shaped structure.

[0006] Preferably, the retractable handle is composed of several straight tubes connected together, with adjacent straight tubes being connected by a socket joint.

[0007] Preferably, the working arm is provided with a displacement motor and a limiting slide hole, and the output end of the displacement motor is fixedly connected to the rotating gear; the nut support arm is provided with a limiting slide rod, the limiting slide rod passes through the limiting slide hole and can slide along the limiting slide hole, the limiting slide rod is provided with a rack, and the rack is meshed with the rotating gear.

[0008] Preferably, the limiting slide bar is provided with a first limiting plate near the bottom of the inner end of the nut support arm, the limiting slide bar is provided with a second limiting plate on the outer side, and the working rotating arm is provided with a first self-resetting switch and a second self-resetting switch;

[0009] The first self-reset switch is disposed opposite to the outer end of the limiting slide rod, and is used so that when the first limiting plate contacts the outer end of the working arm, the outer end of the limiting slide rod presses the trigger rod of the first self-reset switch inward and disconnects the displacement motor.

[0010] The second self-reset switch is disposed opposite to the second limiting plate. When the rotating gear approaches the outer end of the rack, the second limiting plate presses the trigger rod of the second self-reset switch inward, thereby disconnecting the displacement motor.

[0011] Preferably, the working arm is configured as an L-shaped structure, the working angle range of the working arm is set to 180 degrees, the worm gear reducer is provided with an angle fixing seat at the inner end of the working arm, the angle fixing seat is provided with spring top balls and locking holes at working angles of 0 degrees, 90 degrees and 180 degrees, and the working arm is provided with locking bolts for locking the working arm into the corresponding locking holes.

[0012] Preferably, the support base is equipped with a lighting mechanism.

[0013] Preferably, both the worm gear reducer and the working arm are equipped with camera mechanisms.

[0014] Preferably, it also includes an integrated display control mechanism, which includes an integrated display controller. The integrated display controller is provided with a flip cover and an external power interface. The flip cover is provided with a display screen. The bottom of the integrated display controller is provided with a base. The lower end of the base is provided with a connecting sleeve. The connecting sleeve is fitted onto the retractable handle and is fastened by several fixing bolts.

[0015] Preferably, the integrated display controller has a main power switch, a lighting control switch, a video mode switching button, a nut support arm extension button, a nut support arm retraction button, a forward rotation button, a reverse rotation button, a main power status indicator, a nut support arm extension limit trigger indicator, a nut support arm retraction limit indicator, a forward rotation working indicator, a reverse rotation working indicator, two anti-accidental touch rails, and two anti-accidental touch sliding plates.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. The present invention provides a bolt fastening device suitable for narrow spaces. Through an integrated display control system, the device displays camera video and, with the assistance of an auxiliary lighting system, allows real-time monitoring of the operating area and device status. The integrated control system controls the operation of each working sub-module of the fastening device, and a self-reset switch controls the safe working range of the sub-module to prevent overload damage to the device.

[0018] 2. This invention uses a retractable handle, which has the ability to adjust and lock the working range. It can avoid the problem of fixed-length handles affecting operation in some working environments, and has a certain degree of flexibility and adaptability.

[0019] 3. In this invention, the rotation center of the working arm's shaft is coaxial with the rotation centers of the output shaft of the worm gear reducer, the bolt fixing seat, and the nut fixing seat. This ensures that the axial positions of each working component remain unchanged when the working arm rotates and changes angle. The working arm can be locked at any angle within a 180° range. Spring balls and locking holes are provided at the three most frequently used angles, allowing for quick positioning via locking nuts.

[0020] 4. The nut support arm in this invention employs electro-optical control. The extension and retraction of the nut support arm are controlled by the meshing of a micro-motor shaft gear with the rack of a limiting slide rod, adapting to different bolt lengths and actual working conditions. It can simultaneously load bolts and nuts, avoiding the need for two-handed operation required in traditional bolt and nut handling, greatly improving work efficiency. Self-resetting switches are installed at appropriate positions on the working arm and limiting slide rod to prevent the nut support arm from exceeding the safe working area and to prevent overload of the driving micro-motor, thus avoiding overheating and damage.

[0021] 5. The present invention provides a mechanical anti-accidental touch protection device for the nut support arm extension button, retraction button, forward rotation button, and reverse rotation button to prevent the nut support arm extension button and retraction button, and the forward rotation and reverse rotation buttons from being pressed at the same time, thus ensuring the safety of equipment and personnel during use.

[0022] 6. To address the problem of limited operating space and the inability of operators to effectively observe the work area, this invention installs cameras with integrated LED lighting on the front of the worm gear reducer and on the inner side of the working arm. The real-time video information captured by the cameras is displayed on the screen of the integrated display controller. During the process of operating the device to enter the work position and tightening it, the operator can intuitively understand the accurate position and working status of the device in real time.

[0023] 7. In this invention, multiple sets of LED lighting devices of different types are set up to address the insufficient lighting in the construction site operation area. The devices are switched on and off by an integrated display controller, which can provide sufficient lighting for the operation area and meet the illumination requirements of the camera.

[0024] 8. The working devices and components in this invention adopt a 12V DC safe voltage. Through the integrated display controller, the video information captured by the camera is displayed in real time, and the screen splitting and individual display switching of the information from the two cameras can be adjusted through the video mode switching button. The external power supply is connected to each working device and component through the main control board in the integrated display controller and the drive cable bundle. The control signals are transmitted to the execution devices and components through the control cable bundle of the main control board.

[0025] 9. This invention can solve the common problem in building electromechanical construction where the narrow operating space makes it difficult for construction workers to use conventional fastening tools to fasten the connection of duct flange bolts that are close to the wall. It improves the tightness of pipeline connections, increases work efficiency, and can adapt to bolts and nuts of different specifications. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the bolt fastening device in an embodiment of the present invention.

[0027] Figure 2 , 3 This is a partial structural schematic diagram of the bolt fastening device in an embodiment of the present invention.

[0028] Figure 4-6 This is a schematic diagram of the integrated display controller in an embodiment of the present invention.

[0029] Figure 7 This is a schematic diagram of the state when the working arm is at a working angle of 0 degrees and the nut support arm is extended in an embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of the state when the working arm is at a 90-degree working angle and the nut support arm is extended in an embodiment of the present invention.

[0031] Figure 9 This is a schematic diagram of the state when the working arm is at a working angle of 180 degrees and the nut support arm is extended in an embodiment of the present invention.

[0032] Figure 10 This is a schematic diagram of the state when the working arm is at a working angle of 180° and the nut support arm is retracted in an embodiment of the present invention.

[0033] Figure 11 This is a circuit diagram of the integrated display control mechanism in an embodiment of the present invention.

[0034] Figure 12 This is a schematic diagram of the main control board integrating the display control mechanism in an embodiment of the present invention.

[0035] In the diagram: 1. Support base; 2. Telescopic handle; 3. LED light; 4. Worm gear reducer; 5. Bolt fixing seat; 6. Working arm; 61. Locking bolt; 7. Nut support arm; 8. Nut fixing seat; 9. Displacement motor; 10. U-shaped limit seat; 11. Rotating gear; 12. Limiting slide bar; 121. First limit plate; 122. Second limit plate; 13. First self-reset switch; 14. Second self-reset switch; 15. First LED lighting camera; 16. Second LED lighting camera; 17. Integrated display controller; 18. Flip cover; 19. External power interface; 2 0. Display screen; 21. Base; 22. Connecting sleeve; 23. Main power switch; 24. Lighting control switch; 25. Angle fixing seat; 251. Spring ball; 252. Locking hole; 26. Video mode switching button; 27. Nut support arm extension button; 28. Nut support arm retraction button; 29. ​​Forward rotation button; 30. Reverse rotation button; 31. Main power status indicator; 32. Nut support arm extension limit trigger indicator; 33. Nut support arm retraction limit trigger indicator; 34. Forward rotation indicator; 35. Reverse rotation indicator; 36. Anti-accidental touch track; 37. Anti-accidental touch sliding plate. Detailed Implementation

[0036] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations. Example

[0037] A bolt fastening device suitable for confined spaces, as shown in the reference. Figure 1 The device includes a support base 1, which has a C-shaped structure with a web and upper and lower flanges. A retractable handle 2 is bolted to the outer end of the web of the support base 1. The retractable handle 2 is used for fixing the entire device and for spatial displacement operations. The retractable handle 2 consists of two straight tubes connected by a socket joint. The two straight tubes have different diameters; the smaller diameter tube can be nested into the larger diameter tube, and the smaller diameter tube can move axially within the larger diameter tube. The two are secured by a rotary locking mechanism. When the overall length of the retractable handle 2 reaches the required value, the relative position of the two straight tubes can be fixed by the rotary locking mechanism. A grip is provided at the outer end of the retractable handle 2 for easy handling by the operator. Two LED lights 3 are installed on the top inner side of the web of the support base 1 to provide ambient lighting during operation.

[0038] Furthermore, refer to Figure 1 , 2A worm gear reducer 4 is fixed to the inner side of the support base 1, between the upper and lower wing plates. A bolt fixing seat 5 is detachably installed on one side of the worm gear reducer 4. The bolt fixing seat 5 is replaceable, and different specifications of bolts correspond to different specifications of bolt fixing seats 5. The bolt fixing seat 5 is magnetic and can magnetically attract bolts to prevent them from falling off during use. The output shaft of the worm gear reducer 4 is connected to the working arm 6. The working arm 6 is set with an L-shaped structure, and the working angle range of the working arm 6 is set to 180 degrees. An angle fixing seat 25 is fixed to the inner end of the working arm 6 on the worm gear reducer 4. The angle fixing seat 25 is provided with spring top balls 251 and locking holes 252 at working angles of 0 degrees, 90 degrees and 180 degrees. The spring top balls 251 and locking holes 252 are located on the same straight line. A locking bolt 61 is provided on the working arm 6 to lock the working arm 6 into the corresponding locking hole 252 when the working arm 6 rotates to the appropriate position.

[0039] Furthermore, refer to Figure 1-3 The other end of the working arm 6 is slidably connected to the nut support arm 7. A nut fixing seat 8 is detachably mounted on the top of the nut support arm 7. The nut fixing seat 8 is magnetic and can attract nuts, preventing them from falling off during use. The nut fixing seat 8 is arranged opposite to the bolt fixing seat 5. The center of the rotating shaft of the working arm 6 is coaxial with the output shaft of the worm gear reducer 4, the bolt fixing seat 5, and the center of the nut fixing seat 8. Specifically, a displacement motor 9 is fixed to the top of the other end of the working arm 6 via a mounting base. A U-shaped limiting seat 10 is fixed to the outside of the displacement motor 9. The U-shaped limiting seat 10 forms a limiting sliding hole with the upper surface of the working arm 6. The output end of the displacement motor 9 is fixedly connected to the rotating gear 11. A limiting slide rod 12 is fixed at the bottom of the nut support arm 7. The limiting slide rod 12 passes through the limiting slide hole and can slide along the limiting slide hole. The limiting slide rod 12 is locked in place by the limiting slide hole. A groove is opened on the upper surface of the limiting slide rod 12, and a rack is installed in the groove. The rack is meshed with the rotating gear 11. The displacement motor 9 can drive the rotating gear 11 to rotate clockwise or counterclockwise, which in turn drives the rack to move the nut fixing seat 8 to extend or retract along the working rotating arm 6.

[0040] In addition, refer to Figure 1-3To ensure the safe sliding of the limiting slide rod 12 without disengaging from the rotating gear 11, a first limiting plate 121 is fixed to the bottom of the inner end of the limiting slide rod 12 near the nut support arm 7, and a second limiting plate 122 is fixed to the outer side of the limiting slide rod 12. A first self-resetting switch 13 and a second self-resetting switch 14 are installed on the working arm 6. The first self-resetting switch 13 is positioned opposite the outer end of the limiting slide rod 12. When the first limiting plate 121 contacts the outer end of the working arm 6, the outer end of the limiting slide rod 12 presses the trigger rod of the first self-resetting switch 13 inward, disconnecting the power supply to the displacement motor 9, so that the displacement motor 9 no longer drives the rotating gear 11 to rotate, and stopping the limiting slide rod 12 from continuing to retract. The second self-resetting switch 14 is positioned opposite the second limiting plate 122. When the rotating gear 11 approaches the outer end of the rack 13, the second limiting plate 122 presses the trigger rod of the second self-resetting switch 14 inward, disconnecting the displacement motor 9, and stopping the limiting slide rod 12 from continuing to extend.

[0041] Furthermore, refer to Figure 1-3 A first LED lighting camera 15 is installed on the outer end of the worm gear reducer 4 to provide video information of the area in front of the device. A second LED lighting camera 16 is installed on the top of the working arm 6, below the nut fixing seat 8 and the bolt fixing seat 5, to collect the working status of the bolt fixing seat 5 and the nut fixing seat 8 and display it in real time on the display screen 20 of the integrated display controller 17.

[0042] Furthermore, refer to Figure 4 It also includes an integrated display control mechanism for controlling the electrical components in the device. Each controlled electrical component is connected to the integrated display control mechanism via cables. The integrated display control mechanism includes an integrated display controller 17. The top of the integrated display controller 17 has a flip cover 18, and the side has a 12V DC external power interface 19. The inner side of the flip cover 18 has a display screen 20, which is a color LCD screen used to display real-time camera footage. The flip cover 18 flips outwards when in operation and closes and locks onto the integrated display controller 17 when not in operation, preventing damage to the display screen 20 and protecting the operation area buttons and indicator lights. The 12V DC external power interface 19 is a 2-pin interface with protection against incorrect connection and reverse polarity. After the external power plug is connected, it is secured by the external thread of the interface to prevent the power cord from loosening during use. The integrated display controller 17 has a base 21 fixed to its bottom, and a connecting sleeve 22 is fixed to the lower end of the base 21. The connecting sleeve 22 is fitted onto the telescopic handle 2 and can slide along the axis of the telescopic handle 2 and rotate around the axis, thereby changing the working position and angle of the integrated display controller 17. After the integrated display controller 17 has completed the position and angle adjustment, the connecting sleeve 22 can be tightened by several fixing bolts to prevent the base 21 from sliding and rotating during use.

[0043] Furthermore, refer to Figure 5 , 6 11, 12. The integrated display controller 17 has a recessed design, with all buttons and indicator lights installed below the outer edge to prevent the flip cover 18 from colliding with the buttons when closed, thus avoiding damage to the display screen 20. The operating area of ​​the integrated display controller 17 is the core control unit of the device, featuring a main power switch 23, a lighting control switch 24, a video mode switching button 26, a nut support arm extension button 27, a nut support arm retraction button 28, a forward rotation button 29, and a reverse rotation button 30. Correspondingly, there are main power status indicator lights 31, nut support arm extension limit trigger indicator lights 32, nut support arm retraction limit trigger indicator lights 33, forward rotation indicator lights 34, and reverse rotation indicator lights 35, two anti-accidental touch rails 36, and two anti-accidental touch sliders. Plate 37, the anti-accidental touch slide plate 37 is located in the groove of the anti-accidental touch track 36 and can slide along the groove. The length of the anti-accidental touch slide plate 37 is half the length of the anti-accidental touch track 36. Moving the position of the anti-accidental touch slide plate 37 can cover the protected button and prevent two buttons from being triggered at the same time. When the video mode switching button 26 is pressed, the display mode of the camera video on the display screen 20 is switched, and the screen is cyclically switched between the same screen and split screen modes. The electrical operation and display components such as buttons and indicator lights are all connected to the main control board built into the integrated display control mechanism.

[0044] Reference Figure 7-10 The working process of this embodiment includes the following steps:

[0045] Step 1: Connect an external 12V DC power supply to the external power interface 19;

[0046] Step 2: Flip the display screen 20 to the desired position;

[0047] Step 3: Press the main power switch 23 to connect the device to the power supply and power on the main control board for self-test.

[0048] Step 4: Press the lighting control switch 24 and check if the LED light 3 is turned on normally;

[0049] Step 5: Press the video mode switch button 26 to switch the display content and display mode;

[0050] Step 6: Move the anti-accidental touch slide 37, press the nut support arm extension button 27 or the nut support arm retraction button 28, the nut support arm 7 will extend or retract as instructed, and stop moving after colliding with the second self-reset switch or the first self-reset switch, and the nut support arm extension limit trigger indicator 32 or the nut support arm retraction limit indicator 33 will light up.

[0051] Step 7: Move the anti-accidental touch slide 37, press the forward rotation button 29 or the reverse rotation button 30, the output shaft of the worm gear reducer 4 will rotate forward or reverse, and the forward rotation indicator light 34 or the reverse rotation indicator light 35 will light up;

[0052] Step 8: Adjust the length of the retractable handle 2 and lock it;

[0053] Step 9: Adjust the position of the integrated display controller 17 and lock it;

[0054] Step 10: Adjust the working arm 6 to a suitable working angle and lock it;

[0055] Step 11: Adjust the nut support arm 7 to extend to the appropriate position;

[0056] Step 12: Insert the bolt into the bolt holder 5;

[0057] Step 13: Place the nut into the nut holder 8;

[0058] Step 14: Grip the handle firmly and move the device into the working position. Observe the device position and working status through the integrated display controller 17.

[0059] Step 15: Operate the corresponding button on the integrated display controller 17 to complete the bolt tightening operation through the working rotating arm 6 and the nut support arm 7;

[0060] Step 16: Adjust the nut support arm 7 to extend to the appropriate position;

[0061] Step 17: Retract the device and repeat steps 12 to 16 to complete the operation;

[0062] Step 18: Adjust the nut support arm 7 to retract to the limit;

[0063] Step 19: Adjust the length of the telescopic handle 2;

[0064] Step 20: Adjust the position of the working arm 6;

[0065] Step 21: Press the main power switch 23 to turn off the device power;

[0066] Step 22: Disconnect the external 12V DC power supply;

[0067] Step 23: Turn off the display screen 20.

[0068] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A bolt fastening device suitable for use in a confined space, characterised in that, The utility model provides a support base is provided with telescopic handle and worm gear reducer on it, and the worm gear reducer is provided with bolt fixing seat on it, and the output shaft of worm gear reducer is connected with working swing arm, and the other end of working swing arm is slidably connected with nut holder arm, and nut holder arm is provided with nut fixing seat on it, and nut fixing seat is arranged opposite to bolt fixing seat, and bolt fixing seat and nut fixing seat all have magnetism. The working swing arm is provided with a displacement motor and a limiting sliding hole, and the output end of the displacement motor is fixedly connected with a rotating gear; the nut holder arm is provided with a limiting sliding rod, the limiting sliding rod penetrates through the limiting sliding hole and can slide along the limiting sliding hole, and the limiting sliding rod is provided with a rack, and the rack is meshed and connected with the rotating gear. The inner end bottom of the limiting sliding rod close to the nut holder arm is provided with a first limiting plate, and the outer end side of the limiting sliding rod is provided with a second limiting plate, and the working swing arm is provided with a first self-resetting switch and a second self-resetting switch. The first self-resetting switch is arranged opposite to the outer end of the limiting sliding rod, and when the first limiting plate contacts with the outer end of the working swing arm, the outer end of the limiting sliding rod extrudes the trigger rod of the first self-resetting switch to retract, and the displacement motor is disconnected at the same time. The second self-resetting switch is arranged opposite to the second limiting plate, and when the rotating gear is close to the outer end of the rack, the second limiting plate extrudes the trigger rod of the second self-resetting switch to retract, and the displacement motor is disconnected at the same time.

2. The bolt fastening device for a narrow space according to claim 1, wherein The support base is provided as a C-shaped structure.

3. The bolt fastening device for a narrow space according to claim 1 or 2, characterized in that, The telescopic handle is composed of a plurality of straight pipes connected by socket connections between adjacent straight pipes.

4. The bolt fastening device for a narrow space according to claim 1 or 2, wherein The working swing arm is provided as an L-shaped structure, the working angle range of the working swing arm is set as 180 degrees, the worm gear reducer is provided with an angle fixing seat on the inner side end of the working swing arm, spring top beads and locking holes are arranged on the angle fixing seat at working angles of 0 degrees, 90 degrees and 180 degrees, and the working swing arm is provided with locking bolts for locking the working swing arm into the corresponding locking holes.

5. The bolt fastening device for a narrow space according to claim 1 or 2, wherein The support base is provided with an illumination mechanism.

6. The bolt fastening device for a narrow space according to claim 1 or 2, wherein The worm gear reducer and the working swing arm are both provided with a camera mechanism.

7. The bolt fastening device for a narrow space according to claim 1 or 2, wherein An integrated display control mechanism is further included, which comprises an integrated display controller, a flip cover and an external power supply interface are arranged on the integrated display controller, a display screen is arranged on the flip cover, a base is arranged at the bottom of the integrated display controller, a connecting sleeve is arranged at the lower end of the base, the connecting sleeve is sleeved on the telescopic handle and is fastened through a plurality of fixing bolts.

8. The bolt fastening device for narrow spaces according to claim 7, wherein The integrated display controller has a main power switch, an illumination control switch, a video mode switching button, a nut holder arm outward extension button, a nut holder arm inward retraction button, a forward rotation button, a reverse rotation button, a main power state indicator, a nut holder arm outward extension limiting trigger indicator, a nut holder arm inward retraction limiting indicator, a forward rotation working indicator, a reverse rotation working indicator, two anti-misoperation tracks and two anti-misoperation slides.

Images