A mechanized bolt fastening device for narrow space fabricated building modules and method of use

Abstract

A kind of mechanized bolt fastening device for narrow space assembled building module and its using method, comprising: spanner chassis, the top of spanner chassis is fixedly installed with inverted L frame, first gear is rotated by reduction drive assembly, then the first gear of rotation synchronously drives first transmission rod and first rocker at the bottom of first transmission rod, so that transmission rod produces swing, then the transmission rod of swing is driven again in the action of first limiting rod, second limiting rod and sliding groove, drives ratchet spanner and spanner sleeve to move in 30 ° active range and continuously tightens bolt, so that the overall use of the device is light, meet in narrow range Construction, and can be translated and taken out, meet the functional requirements of once living of full renovation building, can achieve module building with hoist and install, improve connection efficiency, reduce operation time, shorten project construction period, greatly reduce on-site construction, improve overall assembly rate.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, specifically to a mechanized bolt fastening device for prefabricated building modules in narrow spaces and its usage method. Background Technology

[0002] Prefabricated buildings represent a major trend in technological advancement within the construction industry. Container-type modular buildings are a primary form, encompassing two main categories: steel structure modular buildings and concrete modular buildings. Structural modular buildings offer advantages such as higher precision, efficiency, and energy savings.

[0003] The key performance of steel structure modular buildings lies in the structural reliability of the nodes between modules, thereby ensuring the safety of the overall structure. At the same time, it is also necessary to ensure a high degree of factory prefabrication to improve building quality and reduce construction cycle. However, these two are often contradictory. Currently common steel structure modular buildings often require pre-reserved holes in the inner and outer wall panels to provide space for on-site structural connection. After the structural connection is completed, the holes must be filled and the inner and outer decorative panels at the openings are installed, which reduces the prefabrication and assembly rate of the inner and outer decorations.

[0004] Due to space constraints at the construction site, workers cannot use common plug-in electric wrenches to tighten bolts. The structural connections use bolts with larger diameters and larger final tightening torques. If manual wrenches are used, the labor costs are high and the efficiency is low. Therefore, a mechanized bolt fastening device for prefabricated building modules in narrow spaces is needed. Summary of the Invention

[0005] The purpose of this invention is to provide a mechanized bolt fastening device and its usage method for prefabricated building modules in narrow spaces. This invention aims to solve the technical problems of traditional on-site construction space limitations, where workers cannot use common direct-insertion electric wrenches to tighten bolts, and where structural connections use large-diameter bolts with large final tightening torques. Using manual wrenches would result in high labor costs and low efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution.

[0007] A mechanized bolt fastening device for prefabricated building modules in narrow spaces includes: a wrench base; The top of the wrench chassis is fixedly mounted with an inverted L-shaped frame, and a first transmission rod is rotatably mounted on the inverted L-shaped frame. A first gear is fixedly mounted on the outer side wall of the first transmission rod. A first rocker arm is fixedly installed at the bottom of the first transmission rod, and a force transmission rod is rotatably installed on the round rod of the first rocker arm; The top of the wrench chassis is provided with a speed reduction drive assembly, and the speed reduction drive assembly is meshed with the first gear. A ratchet wrench is provided above the wrench chassis, and the other end of the force transmission rod is connected to the ratchet wrench by a pin. A wrench sleeve is provided in the opening at one end of the ratchet wrench. The bottom of the ratchet wrench is fixedly equipped with a first limiting rod and a second limiting rod, and the top of the wrench chassis has two sliding grooves of different lengths, with the first limiting rod and the second limiting rod respectively inserted into the inner side of the two sliding grooves. The wrench chassis has a insertion slot on one side, and a limit clamp adjuster is provided on the inner side of the insertion slot. The limit clamp adjuster is provided with a positioning mechanism, and the limit clamp adjuster is fixed to the wrench chassis through the positioning mechanism.

[0008] Preferably, the speed reduction drive assembly includes a fixed frame fixedly installed on the top of the wrench chassis, on which a speed reducer and a motor are fixedly installed respectively, and the output end of the motor is fixedly connected to the input end of the speed reducer; The speed reduction drive assembly includes a speed reducer and a motor mounted on the wrench chassis, and the output end of the motor is fixedly connected to the input end of the speed reducer. A fixing frame is fixedly installed on the top of the wrench chassis, and the speed reducer is fixedly installed on the fixing frame. A second transmission rod is fixedly connected to the output end of the reducer, and a second gear is fixedly installed on the outer wall of the second transmission rod, and the second gear is meshed with the first gear.

[0009] Preferably, a sleeve removal rod is rotatably mounted on one side of the wrench chassis, and one end of the sleeve removal rod is located below the wrench sleeve.

[0010] Preferably, a plurality of snap-fit ​​plates are arranged in a circular array in the groove at one end of the ratchet wrench, and fixing posts are fixedly installed on the upper and lower sides of the plurality of snap-fit ​​plates, and the other end of the fixing posts is connected to the ratchet wrench. A plurality of snap-fit ​​grooves are opened in a circular array on the outer side wall of the wrench sleeve, and the snap-fit ​​plates are inserted into the snap-fit ​​grooves.

[0011] Preferably, the limit card adjuster includes a limit card inserted into the inner side of the insertion slot, a rack is fixedly installed on one side of the limit card, and an adjustment mechanism is provided on one side of the wrench chassis, and the adjustment mechanism is meshed with the rack.

[0012] Preferably, the positioning mechanism includes a plurality of positioning holes sequentially formed on the top of the limiting card from left to right, and a plug hole is formed on the top of the wrench base. A limiting pin is inserted into the inner side of the plug hole, and the bottom of the limiting pin is inserted into one of the positioning holes that communicates with the plug hole.

[0013] Preferably, the adjustment mechanism includes a fixed plate fixedly installed on one side of the wrench chassis, a third transmission rod is provided through the fixed plate, and the third transmission rod is rotatably connected to the fixed plate; A third gear is fixedly installed on the outer wall of the fixed plate, and the output end of the third gear is meshed with the rack. A second rocker arm is fixedly installed on the top of the fixed plate.

[0014] The method of using this mechanized bolt fastening device for prefabricated building modules in narrow spaces includes the following steps.

[0015] Step 1: Place the wrench base on the floor finish and push it into the pre-reserved baseboard position under the wall panel.

[0016] Step 2: Adjust the position of the ratchet wrench so that the opening of the wrench sleeve is precisely fitted into the bolt to be tightened, ensuring that the wrench sleeve is engaged with the locking groove through the locking plate.

[0017] Step 3: Manually rotate the second rocker of the limit clamp adjuster to drive the third gear to move the rack, thereby pushing the limit clamp out and clamping it to the wall base.

[0018] Step 4: Insert the limit pin into the insertion hole on the top of the wrench base, and select the corresponding positioning hole on the limit card to insert it to prevent the tool from shifting due to the reaction force when tightening the bolt.

[0019] Step 5: Turn on the motor. After the power is reduced in speed and increased in torque by the reducer, it drives the second gear through the second transmission rod. The second gear meshes with the first gear, causing the first transmission rod and the first rocker arm to rotate. The first rocker arm pulls the force transmission rod to swing, driving the ratchet wrench to reciprocate, thereby causing the ratchet wrench to tighten the bolt. At the same time, the first limit rod and the second limit rod slide in the slide groove.

[0020] Step six: Repeatedly swing the ratchet wrench until the bolt reaches the final tightening torque.

[0021] Step 7: After tightening, press one end of the socket removal lever and push the other end to lift the wrench socket, disengaging it from the ratchet wrench's locking plate. Use a clamp to remove the wrench socket, and then move the entire wrench set out by sliding the wrench outwards.

[0022] Step 8: Pull out the limit pin, rotate the second rocker arm in the opposite direction to retract the limit clip, and slide the wrench base horizontally to pull it out, disengaging it from the current bolt position.

[0023] Step nine: Move the tool to the next bolt position and repeat steps two through eight until all bolts are tightened.

[0024] Step 10: After tightening all bolts, slide the wrench out horizontally and fasten the reserved baseboard to complete the installation.

[0025] Compared with the prior art, the present invention has the following features and beneficial effects.

[0026] 1. The first gear is driven to rotate by the speed reduction drive assembly. The rotating first gear then synchronously drives the first transmission rod and the first rocker arm at the bottom of the first transmission rod, causing the force transmission rod to swing. The swinging force transmission rod, under the action of the first limit rod, the second limit rod, and the slide groove, drives the ratchet wrench and the wrench sleeve to move within a 30° range of motion to continuously tighten the bolts. This makes the device easy to use, allows for construction within a 45mm range, and can be moved and removed horizontally. It meets the functional requirements of one-time completion of fully furnished buildings, enabling modular buildings to be hoisted and installed simultaneously, improving connection efficiency, reducing operation time, shortening the project construction cycle, greatly reducing on-site construction, and improving the overall assembly rate.

[0027] 2. The device is positioned and locked to the wall base by the limit clamp adjustment on the wrench chassis. After the clamp is in place, the limit clamp adjustment is locked by the positioning mechanism pin, thereby preventing the wrench chassis from coming off under the reaction force when the bolt is turned.

[0028] 3. This invention is highly adaptable to confined spaces, enabling final bolt tightening in tight areas with high efficiency and labor-saving performance. The modular building installation tool utilizes a motor-driven, gear-reduction design to replace manual wrenches, offering high torque and efficiency, thus solving the problems of high labor costs and slow speed. Simultaneously, the sliding design avoids damage to pre-finished walls, allowing for "installation as needed," improving assembly efficiency. Furthermore, the invention's dual fixing mechanism—limiting clip adjuster and positioning holes—ensures operational stability and accurate operation. Attached Figure Description

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure proposed in this invention.

[0031] Figure 2 This is a schematic diagram of the rear view structure proposed in this invention.

[0032] Figure 3 The present invention provides a structural schematic diagram of a deceleration drive assembly.

[0033] Figure 4 This is a schematic diagram of the structure of the sleeve extraction rod proposed in this invention.

[0034] Figure 5 This is a schematic diagram of the ratchet wrench proposed in this invention.

[0035] Figure 6 This is a schematic diagram of the positioning hole proposed in this invention.

[0036] Figure 7 This is a schematic diagram of the structure of the limit card adjuster proposed in this invention.

[0037] Figure 8 The diagram below shows the structure of the limiting card proposed in this invention.

[0038] Figure 9 This is a schematic diagram of the snap-fit ​​plate proposed in this invention.

[0039] Figure reference numerals: 1 - Wrench base, 2 - L-shaped frame, 3 - First transmission rod, 4 - First gear, 5 - First rocker arm, 6 - Force transmission rod, 7 - Reduction drive assembly, 71 - Reducer, 72 - Fixed frame, 73 - Second transmission rod, 74 - Second gear, 75 - Motor, 8 - Ratchet wrench, 9 - First limit rod, 10 - Second limit rod, 11 - Slide groove, 12 - Wrench sleeve, 13 - Limit clamp adjuster, 13 01 - Limiting pin, 1302 - Rack, 1303 - Adjusting mechanism, 13031 - Fixing plate, 13032 - Third transmission rod, 13033 - Third gear, 13034 - Second rocker arm, 14 - Sleeve removal rod, 141 - Rod body, 142 - Rotating shaft, 143 - Arc plate, 144 - Operating rod, 15 - Snap-fit ​​plate, 16 - Snap-fit ​​groove, 17 - Positioning hole, 18 - Insertion hole, 19 - Limiting pin. Detailed Implementation

[0040] like Figure 1-9As shown, this mechanized bolt fastening device for prefabricated building modules in narrow spaces includes: a wrench base 1; an inverted L-shaped frame 2 fixedly mounted on the top of the wrench base 1, a first transmission rod 3 rotatably mounted on the inverted L-shaped frame 2, a first gear 4 fixedly mounted on the outer side wall of the first transmission rod 3; a first rocker arm 5 fixedly mounted on the bottom of the first transmission rod 3, a force transmission rod 6 rotatably mounted on the round rod of the first rocker arm 5; a reduction drive assembly 7 is provided on the top of the wrench base 1, and the reduction drive assembly 7 is meshed with the first gear 4; a ratchet wrench 8 is provided above the wrench base 1, and the other end of the force transmission rod 6 is pin-connected to the ratchet wrench 8, and one end of the ratchet wrench 8... A wrench sleeve 12 is provided inside the opening; a sleeve removal rod 14 is rotatably installed on one side of the wrench base 1, and one end of the sleeve removal rod 14 is located below the wrench sleeve 12; a first limiting rod 9 and a second limiting rod 10 are fixedly installed on the bottom of the ratchet wrench 8; two sliding grooves 11 of different lengths are opened on the top of the wrench base 1, and the first limiting rod 9 and the second limiting rod 10 are respectively inserted into the inner side of the two sliding grooves 11; a insertion groove is opened on one side of the wrench base 1, and a limiting clamp adjuster 13 is provided inside the insertion groove. A positioning mechanism is provided on the limiting clamp adjuster 13, and the limiting clamp adjuster 13 is fixed to the wrench base 1 through the positioning mechanism.

[0041] This invention provides a mechanized bolt fastening device for prefabricated building modules in narrow spaces. In use, the wrench base 1 is placed on the floor surface and pushed laterally to the 45mm high baseboard position reserved under the wall panel. Then, the opening of the wrench sleeve 12 on the ratchet wrench 8 is aligned with the bolt and pushed in. Next, the limit clamp adjuster 13 is manually adjusted to engage with the wall base. Once the clamp is in place, the positioning mechanism locks the adjusted limit clamp adjuster 13. Then, the reduction drive assembly 7 is activated, causing the first transmission rod 3 and its bottom rocker arm 5 to rotate via the first gear 4 meshing with it. This causes the force transmission rod 6 to swing under the action of the first rocker arm 5, transmitting force to the ratchet wrench 8, causing the ratchet wrench 8 to engage with the first limit rod. 9. With the cooperation of the second limiting rod 10 and the sliding groove 11, the bolt can be continuously tightened within a 30° range of motion. After tightening, one end of the sleeve removal rod 14 is pressed manually, so that the other end of the sleeve removal rod 14 pushes up the wrench sleeve 12 in the ratchet wrench 8. Then, the wrench is manually removed and pulled out using a clamp. After being pulled out, the wrench base 1 is manually moved outward. Finally, the above operation is repeated to tighten the other bolt. After all the bolts are tightened, the wrench is moved outward and the reserved 45mm skirting board is fastened. The installation is then completed. This makes the device easy to use, meets the construction requirements within a 45mm range, and can be moved outward. It meets the functional requirements of one-time completion of fully furnished buildings. Modular buildings can be hoisted and installed at the same time, improving connection efficiency, reducing operation time, shortening the project construction cycle, greatly reducing on-site construction, and improving the overall assembly rate.

[0042] In this embodiment, the speed reduction drive assembly 7 includes a speed reducer 71 and a motor 75 mounted on the wrench chassis 1. The output end of the motor 75 is fixedly connected to the input end of the speed reducer 72. A mounting bracket 72 is fixedly mounted on the top of the wrench chassis 1, and the speed reducer 71 is fixedly mounted on the mounting bracket 72. A second transmission rod 73 is fixedly connected to the output end of the speed reducer 71. A second gear 74 is fixedly mounted on the outer wall of the second transmission rod 73, and the second gear 74 is meshed with the first gear 4. The motor 75 drives the speed reducer 71, and then the speed reducer 71 drives the second transmission rod 73, so that the second gear 74, through the first gear 4 meshing with it, can drive the first transmission rod 3 and the first rocker arm 5 to rotate, thereby enabling the force transmission rod 6 to drive the ratchet wrench 8 to tighten the bolt.

[0043] In this embodiment, a plurality of snap-fit ​​plates 15 are arranged in a circular array in the groove at one end of the ratchet wrench 8. Fixing posts are fixedly installed on the upper and lower sides of the plurality of snap-fit ​​plates 15, and the other end of the fixing posts is rotatably connected to the ratchet wrench 8. The snap-fit ​​plates 15 can rotate within a small range, and the plurality of snap-fit ​​plates 15 form the pawl of the ratchet. A plurality of snap-fit ​​grooves 16 are opened in a circular array on the outer side wall of the wrench sleeve 12, and the snap-fit ​​plates 15 are inserted into the snap-fit ​​grooves 16. The locking plate 15 and locking groove 16 can limit and fix the wrench sleeve 12 inserted in the ratchet wrench 8, ensuring that the ratchet wrench 8 can drive the wrench sleeve 12 to move and tighten the bolt. The locking groove 16 of the wrench sleeve 12 is equivalent to the tooth groove of the ratchet, and the locking plate 15 is locked in the locking groove 16. When the wrench sleeve 12 tightens the bolt, the locking plate 15 prevents the ratchet wrench 8 from rotating relative to the wrench sleeve 12. When the position of the ratchet wrench 8 needs to be adjusted after each torque is applied, the ratchet wrench 8 is rotated in the opposite direction, the wrench sleeve 12 does not move, and the locking plate 15 can slide over the tooth groove of the wrench sleeve 12. In this embodiment, an arc-shaped groove is provided at the end of the ratchet wrench 8, corresponding to the installation position of a set of snap-fit ​​plates 15; a set of snap-fit ​​plates 15 is installed in the arc-shaped groove; a limiting member is provided at the foremost side of the set of snap-fit ​​plates 15 to prevent the foremost snap-fit ​​plate 15 from rotating clockwise. Here, the starting point of a set of snap-fit ​​plates 15 in the clockwise direction is defined as the foremost side; the limiting member is located near the foremost snap-fit ​​plate 15, at the top or bottom of the arc-shaped groove; when the ratchet wrench 8 is used to tighten the bolt, it is used to block the snap-fit ​​plate 15 to prevent it from rotating clockwise and unloading the force.

[0044] In this embodiment, the limit card adjuster 13 includes a limit card 1301 inserted into the inner side of the insertion slot. A rack 1302 is fixedly installed on one side of the limit card 1301. An adjustment mechanism 1303 is provided on one side of the wrench base 1, and the adjustment mechanism 1303 is meshed with the rack 1302. Specifically, by manually rotating the adjustment mechanism 1303, the rotating adjustment mechanism 1303 drives the limit card 1301 to move through the rack 1302 meshing with it, and causes one side of the limit card 1301 to lock against the wall base. Then, under the action of the positioning mechanism, the adjusted limit card 1301 can be locked.

[0045] In this embodiment, the positioning mechanism includes multiple positioning holes 17 sequentially formed from left to right on the top of the limit card 1301. A insertion hole 18 is formed on the top of the wrench base 1. A limit pin 19 is inserted into the inner side of the insertion hole 18, and the bottom of the limit pin 19 is inserted into one of the positioning holes 17 that communicates with the insertion hole 18. Specifically, by manually inserting the limit pin 19 into the positioning hole 17 that communicates with the insertion hole 18, the adjusted limit card 1301 can be locked.

[0046] In this embodiment, the adjusting mechanism 1303 includes a fixed plate 13031 fixedly installed on one side of the wrench chassis 1. A third transmission rod 13032 is disposed through the fixed plate 13031, and the third transmission rod 13032 is rotatably connected to the fixed plate 13031. A third gear 13033 is fixedly installed on the outer wall of the fixed plate 13031, and the output end of the third gear 13033 is meshed with the rack 1302. A second rocker arm 13034 is fixedly installed on the top of the fixed plate 13031. Specifically, by manually rotating the second rocker arm 13034, it can drive the third transmission rod 13032 and the third gear 13033. Then, the rotating third gear 13033, through the rack 1302 meshing with it, can drive the limit card 1301 to move.

[0047] In this embodiment, the sleeve removal rod 14 includes a rod body 141; a rotating shaft 142 is provided at one end of the rod body 141, and the rotating shaft 142 is rotatably connected to the side of the wrench base 1; an arc plate 143 is provided at the other end of the rod body 141; the arc plate 143 is located below the wrench sleeve 12 and is correspondingly provided to the wall of the wrench sleeve 12; an operating rod 144 is provided on the rotating shaft 142 on the side away from the rod body 141; the sleeve removal rod 14 adopts the lever principle, with the rod body 141 and the operating rod 144 as the two ends of the lever, and the rotating shaft 142 as the fulcrum of the lever. By pressing down the operating rod 144, the rod body 141 tilts upward, and the arc plate 143 pushes the wrench sleeve 12 upward.

[0048] The method of using this mechanized bolt fastening device for prefabricated building modules in narrow spaces includes the following steps.

[0049] Step 1: Place the wrench base 1 on the floor decoration surface and push it into the reserved baseboard position under the wall panel.

[0050] Step 2: Adjust the position of the ratchet wrench 8 so that the opening of the wrench sleeve 12 is precisely fitted into the bolt to be tightened, ensuring that the wrench sleeve 12 is engaged with the locking groove 16 through the locking plate 15.

[0051] Step 3: Manually rotate the second rocker arm 13034 of the limit card adjuster 13 to drive the third gear 13033 to move the rack 1302, thereby pushing the limit card 1301 out and clamping it to the wall base.

[0052] Step 4: Insert the limit pin 19 into the insertion hole 18 on the top of the wrench base 1, and insert it into the corresponding positioning hole 17 on the limit card 1301 to prevent the tool from shifting due to the reaction force when tightening the bolt.

[0053] Step 5: Start the motor 75. After the power is reduced in speed and increased in torque by the reducer 71, it drives the second gear 74 through the second transmission rod 73. The second gear 74 meshes with the first gear 4, driving the first transmission rod 3 and the first rocker arm 5 to rotate. The first rocker arm 5 pulls the force transmission rod 6 to swing, driving the ratchet wrench 8 to reciprocate, thereby limiting the ratchet wrench 8 to tighten the bolt within a 30° range of motion. At the same time, the first limit rod 9 and the second limit rod 10 slide in the slide groove 11.

[0054] Step six: Repeat the oscillation of the ratchet wrench 8 until the bolt reaches the final tightening torque.

[0055] Step 7: After tightening, press one end of the socket removal lever 14 and push the other end to lift the wrench socket 12, so that it is disengaged from the locking plate 15 of the ratchet wrench 8. Use a clamp to remove the wrench socket 12, and then move the entire wrench set out by moving the wrench outward.

[0056] Step 8: Pull out the limit pin 19, rotate the second rocker arm 13034 in the opposite direction to retract the limit clip 1301, and slide the wrench base 1 horizontally to pull it out, disengaging it from the current bolt position.

[0057] Step nine: Move the tool to the next bolt position and repeat steps two through eight until all bolts are tightened.

[0058] Step 10: After tightening all bolts, slide the wrench out horizontally and fasten the reserved baseboard to complete the installation.

[0059] In this embodiment, the bolts are embedded in the floor of the modular building, and the upper end of the bolts extends beyond the top surface of the floor; at the bottom of the wall, an installation groove is provided at the position corresponding to the bolt, and the limiting card 1301 is locked in the groove wall or on other bolts.

[0060] The above embodiments are not exhaustive examples of specific implementation methods, and other embodiments are also possible. The purpose of the above embodiments is to illustrate the present invention, rather than to limit the scope of protection of the present invention. All applications derived from simple variations of the present invention fall within the scope of protection of the present invention.

Claims

1. A mechanized bolt fastening device for prefabricated building modules in narrow spaces, characterized in that, include: Wrench chassis (1); The top of the wrench chassis (1) is fixedly installed with an inverted L-shaped frame (2), and a first transmission rod (3) is rotatably installed on the inverted L-shaped frame (2). A first gear (4) is fixedly installed on the outer side wall of the first transmission rod (3). A first rocker arm (5) is fixedly installed at the bottom of the first transmission rod (3), and a force transmission rod (6) is rotatably installed on the round rod of the first rocker arm (5). The top of the wrench chassis (1) is provided with a speed reduction drive assembly (7), and the speed reduction drive assembly (7) is meshed with the first gear (4). A ratchet wrench (8) is provided above the wrench chassis (1), and the other end of the force transmission rod (6) is connected to the ratchet wrench (8) by a pin. A wrench sleeve (12) is provided in the opening at one end of the ratchet wrench (8). The bottom of the ratchet wrench (8) is fixedly equipped with a first limiting rod (9) and a second limiting rod (10). The top of the wrench base (1) has two sliding grooves (11) of different lengths, and the first limiting rod (9) and the second limiting rod (10) are respectively inserted into the inner side of the two sliding grooves (11). A insertion slot is provided on one side of the wrench base (1), and a limit clamping adjustment device (13) is provided on the inner side of the insertion slot. A positioning mechanism is provided on the limit clamping adjustment device (13), and the limit clamping adjustment device (13) is fixed to the wrench base (1) through the positioning mechanism. A sleeve removal rod (14) is rotatably installed on one side of the wrench base (1), and one end of the sleeve removal rod (14) is located at the wrench sleeve (12). Below the ratchet wrench (8); a plurality of snap-fit ​​plates (15) are arranged in a circular array in the groove at one end of the ratchet wrench (8); a plurality of snap-fit ​​grooves (16) are arranged in a circular array on the outer side wall of the wrench sleeve (12); and the snap-fit ​​plates (15) and the snap-fit ​​grooves (16) are inserted into each other; the limiting clip adjuster (13) includes a limiting clip (1301) inserted into the inner side of the insertion groove; the limiting clip (1301) can extend out and clamp the wall base.

2. The mechanized bolt fastening device for prefabricated building modules in narrow spaces according to claim 1, characterized in that: The speed reduction drive assembly (7) includes a speed reducer (71) and a motor (75) mounted on the wrench chassis (1), and the output end of the motor (75) is fixedly connected to the input end of the speed reducer (72). A fixed frame (72) is fixedly mounted on the top of the wrench chassis (1), and the speed reducer (71) is fixedly mounted on the fixed frame (72). A second transmission rod (73) is fixedly connected to the output end of the speed reducer (71), and a second gear (74) is fixedly mounted on the outer side wall of the second transmission rod (73), and the second gear (74) meshes with the first gear (4).

3. The mechanized bolt fastening device for prefabricated building modules in narrow spaces according to claim 2, characterized in that: Each of the multiple snap-fit ​​plates (15) has a fixing post fixedly installed on its upper and lower sides, and the other end of the fixing post is connected to the ratchet wrench (8).

4. The mechanized bolt fastening device for prefabricated building modules in narrow spaces according to claim 3, characterized in that: A rack (1302) is fixedly installed on one side of the limiting card (1301), and an adjustment mechanism (1303) is provided on one side of the wrench chassis (1), and the adjustment mechanism (1303) is meshed with the rack (1302).

5. The mechanized bolt fastening device for prefabricated building modules in narrow spaces according to claim 4, characterized in that: The positioning mechanism includes a plurality of positioning holes (17) sequentially opened on the top of the limit card (1301) from left to right. The top of the wrench chassis (1) is provided with a plug hole (18). A limit pin (19) is inserted into the inner side of the plug hole (18), and the bottom of the limit pin (19) is inserted into one of the positioning holes (17) that are connected to the plug hole (18).

6. The mechanized bolt fastening device for prefabricated building modules in narrow spaces according to claim 5, characterized in that: The adjustment mechanism (1303) includes a fixed plate (13031) fixedly installed on one side of the wrench chassis (1), a third transmission rod (13032) is provided through the fixed plate (13031), and the third transmission rod (13032) is rotatably connected to the fixed plate (13031); a third gear (13033) is fixedly installed on the outer wall of the fixed plate (13031), and the output end of the third gear (13033) is meshed with the rack (1302); a second rocker arm (13034) is fixedly installed on the top of the fixed plate (13031).

7. A method of using the mechanized bolt fastening device for prefabricated building modules in narrow spaces as described in claim 6, characterized in that, The steps include the following: Step 1: Place the wrench base (1) on the floor decoration surface and push it into the reserved baseboard position under the wall panel; Step 2: Adjust the position of the ratchet wrench (8) so that the opening of the wrench sleeve (12) is precisely fitted into the bolt to be tightened, and ensure that the wrench sleeve (12) is engaged with the locking groove (16) through the locking plate (15); Step 3: Manually rotate the second rocker arm (13034) of the limit card adjuster (13) to drive the third gear (13033) to move the rack (1302), thereby pushing the limit card (1301) out to clamp the wall base. Step 4: Insert the limit pin (19) into the insertion hole (18) on the top of the wrench base (1), and select the corresponding positioning hole (17) on the limit card (1301) to insert, so as to prevent the tool from shifting due to the reaction force when tightening the bolt; Step 5: Turn on the motor (75). After the power is reduced in speed and increased in torque by the reducer (71), it drives the second gear (74) through the second transmission rod (73). The second gear (74) meshes with the first gear (4), causing the first transmission rod (3) and the first rocker arm (5) to rotate. The first rocker arm (5) pulls the force transmission rod (6) to swing, driving the ratchet wrench (8) to reciprocate, thereby causing the ratchet wrench (8) to tighten the bolt. At the same time, the first limit rod (9) and the second limit rod (10) slide in the slide groove (11). Step 6: Repeatedly swing the ratchet wrench (8) until the bolt reaches the final tightening torque; Step 7: After tightening, press one end of the socket removal lever (14) and push up the other end of the wrench socket (12) to disengage it from the snap plate (15) of the ratchet wrench (8). Use a clamp to remove the wrench socket (12), and then move the entire wrench outward by moving the wrench outward. Step 8: Pull out the limit pin (19), rotate the second rocker arm (13034) in the opposite direction to retract the limit card (1301), and slide the wrench base (1) laterally out to disengage from the current bolt position; Step 9: Move the tool to the next bolt position and repeat steps 2 through 8 until all bolts are tightened; Step 10: After tightening all bolts, slide the wrench out horizontally and fasten the reserved baseboard to complete the installation.

Images