A bolt conversion device for narrow spaces

Abstract

The utility model provides a kind of bolt conversion device of narrow space, including conversion mechanism and jacking mechanism, conversion mechanism is by installation bottom plate, conversion box, first bevel gear drive mechanism, second bevel gear drive mechanism, transmission sleeve and tightening sleeve composition.The bottom of installation bottom plate is provided with jacking mechanism, top is provided with conversion box;The front side wall and top of conversion box are provided with respectively meshing connection's first bevel gear drive mechanism, second bevel gear drive mechanism, the front end of first bevel gear drive mechanism is provided with transmission sleeve, the top of second bevel gear drive mechanism is provided with tightening sleeve.The utility model converts linear rotation movement into space 90 ° vertical motion by two bevel gear structures, position originally needing to be tightened in bottom is converted into front tightening, can reduce installation personnel and procedure, save time and labour, significantly reduce cost under the premise of guaranteeing quality, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bolt-assisted installation technology, and in particular to a bolt-driving conversion device for narrow spaces, which is suitable for construction scenarios where bolts are driven into the bottom of parts or in narrow spaces where manual operation is difficult. Background Technology

[0002] In industrial production, many products require bolt tightening in multiple directions during assembly, especially for complex components such as water tank supports. Traditional manual methods have significant limitations when dealing with the bottom of the product or in confined spaces: operators cannot directly access the bottom bolt installation locations, often requiring this work to be postponed to later processes, thus increasing installation costs. This method not only adds production steps and prolongs operation time but may also lead to a decrease in assembly accuracy.

[0003] While some bolt installation aids exist in existing technologies, they generally suffer from low conversion efficiency and poor stability, failing to meet the special requirements of operations in confined spaces. Especially in situations requiring simultaneous bolt installation in multiple directions, existing tools often necessitate frequent angle or position changes, severely impacting work efficiency. Furthermore, existing devices are insufficient in providing auxiliary support force, making it difficult to ensure stability during bolt tightening. These problems all restrict improvements in production efficiency and the assurance of product quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a bolt-driving conversion device for narrow spaces, which addresses the shortcomings of the existing technology, reduces personnel and processes, and lowers costs and improves production efficiency while ensuring quality.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution:

[0006] A bolt-driving conversion device for confined spaces includes a conversion mechanism and a lifting mechanism. The conversion mechanism comprises a mounting base plate, a conversion housing, a first bevel gear transmission mechanism, a second bevel gear transmission mechanism, a transmission sleeve that can cooperate with an electric tightening gun, and a tightening sleeve for accommodating bolts / screws; wherein:

[0007] The bottom of the mounting base plate is provided with the lifting mechanism, and the top is provided with the conversion box; the front side wall and the top of the conversion box are respectively provided with a first bevel gear transmission mechanism and a second bevel gear transmission mechanism that are meshed together, the front end of the first bevel gear transmission mechanism is provided with the transmission sleeve, and the top of the second bevel gear transmission mechanism is provided with the tightening sleeve.

[0008] Preferably, the conversion box is a square frame structure, with a first transmission mounting hole on its front side wall and a second transmission mounting hole on its top, wherein:

[0009] The first double bearing seat of the first bevel gear transmission mechanism is installed in the first transmission mounting hole, and the second double bearing seat of the second bevel gear transmission mechanism is installed in the second transmission mounting hole.

[0010] Preferably, the rear wall of the conversion box is provided with an inspection port, and the left and right side walls are respectively provided with observation ports, wherein:

[0011] A maintenance baffle can be detachably installed at the upper opening of the inspection port, and transparent observation windows can be detachably installed at both of the left and right observation ports.

[0012] Preferably, a stop block is installed on the mounting base plate at the lower position corresponding to the inspection port of the conversion box, and

[0013] A temporary storage seat is provided at the rear end and / or both sides of the mounting base plate, and a first bolt storage hole and a second bolt storage hole are respectively opened on the side wall and / or top of the temporary storage seat.

[0014] Preferably, the first bevel gear transmission mechanism includes a first transmission shaft, a first double bearing housing, and a first bevel gear, wherein:

[0015] The first drive shaft is horizontally mounted on the front side wall of the conversion box via the first double bearing seat. Its front end is detachably connected to the drive sleeve, and its rear end is fixedly connected to the first bevel gear.

[0016] Preferably, the second bevel gear transmission mechanism includes a second transmission shaft, a second double bearing housing, and a second bevel gear, wherein:

[0017] The second drive shaft is vertically mounted on the top of the conversion housing via the second double bearing seat. Its upper end is detachably connected to the tightening sleeve, and its lower end is fixedly connected to the second bevel gear. The second bevel gear meshes with the first bevel gear of the first bevel gear transmission mechanism inside the conversion housing.

[0018] Preferably, the lifting mechanism includes a lifting cylinder, a lifting rod, and a lifting plate, wherein:

[0019] The lifting cylinder is arranged vertically, and its output shaft is connected to the lifting rod via a coupling; the top end of the lifting rod is connected to the lifting plate, and the lifting plate is fixedly installed on the bottom of the mounting base plate by bolts.

[0020] More preferably, the lifting mechanism further includes a limiting sleeve and a limiting guide rod, wherein:

[0021] There are two limiting sleeves, which are fixedly installed on the left and right sides of the lifting cylinder respectively, and the limiting guide holes that run vertically through the cylinder are opened inside them.

[0022] There are two limiting guide rods, the lower ends of which are slidably installed in the limiting guide holes of the corresponding limiting sleeves, and the top ends are fixedly connected to the left and right ends of the lifting plate, respectively.

[0023] Preferably, the narrow space bolt-driving conversion device further includes a limiting mechanism disposed on one side of the conversion mechanism, wherein:

[0024] The side mounting plate on the limiting mechanism is detachably connected to the lifting cylinder on the lifting mechanism by bolts, and is connected to the top of the mounting base plate by an inverted L-shaped limiting bracket.

[0025] Preferably, the upper transverse section of the limiting bracket is threaded with an adjustable screw that can be adjusted up and down, and the bottom of the adjusting screw is provided with a rubber buffer pad.

[0026] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0027] This application provides a bolt-installation conversion device for confined spaces. Through a conversion mechanism consisting of a conversion housing, a first bevel gear transmission mechanism, a second bevel gear transmission mechanism, a transmission sleeve, and a tightening sleeve, linear rotational motion is converted into 90° vertical motion in space, achieving a change in transmission direction. This allows for tightening from the bottom to the front, instead of the bottom. A lifting mechanism provides stable support, and a limiting mechanism ensures operational accuracy. This solves the problem of difficult bolt installation in confined spaces. The conversion device reduces the number of installation personnel and procedures, saving time and effort. While ensuring quality, it significantly reduces costs and improves production efficiency, offering advantages such as high operational efficiency and enhanced operational stability. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a bolt-driving conversion device for narrow spaces according to the present invention. Figure 1 ;

[0029] Figure 2 This is a three-dimensional structural diagram of a bolt-driving conversion device for narrow spaces according to the present invention. Figure 2 ;

[0030] Figure 3 This is a three-dimensional structural diagram of a bolt-driving conversion device for narrow spaces according to the present invention. Figure 3 ;

[0031] Figure 4 This is a schematic diagram of the main structure of a bolt-fitting conversion device for narrow spaces according to the present invention;

[0032] Figure 5 This is a cross-sectional view of a bolt-fitting conversion device for narrow spaces according to the present invention;

[0033] Figure 6 This is a schematic diagram of the assembly structure of the conversion mechanism and the lifting mechanism in a narrow space bolt-driving conversion device of this utility model;

[0034] The accompanying figures are labeled as follows:

[0035] 100-Conversion mechanism, 110-Mounting base plate, 120-Conversion housing, 121-First transmission mounting hole, 122-Second transmission mounting hole, 123-Inspection port, 124-Observation port, 125-Inspection baffle, 126-Transparent observation window, 130-First bevel gear transmission mechanism, 131-First transmission shaft, 132-First double bearing seat, 133-First bevel gear, 140-Second bevel gear transmission mechanism, 141-Second transmission shaft, 142-Second double bearing seat, 143-Second bevel gear, 150-Transmission sleeve, 160-Tightening sleeve, 170-Stop block, 180-Temporary storage seat, 181-First bolt temporary storage hole, 182-Second bolt temporary storage hole;

[0036] 200-Lifting mechanism, 201-Lifting cylinder, 202-Lifting rod, 203-Lifting plate, 204-Limiting sleeve, 205-Limiting guide rod;

[0037] 300 - Limiting mechanism, 301 - Side mounting plate, 302 - Limiting bracket, 303 - Adjusting screw, 304 - Rubber buffer pad. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0039] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In existing technologies, after the components are assembled, bolt tightening operations are required in multiple directions. The bottom position is difficult to access manually, often necessitating additional steps or adjustments to the assembly sequence. Traditional methods use extended tools or alter the assembly process, leading to reduced production efficiency and increased costs. This is especially true in automotive radiator bracket products, where bottom bolt tightening requires waiting for subsequent processes, resulting in extended production cycles.

[0041] To address these issues, researchers discovered that existing tools were ill-suited for working in confined spaces at the bottom, necessitating the design of a novel transmission structure to alter the direction of force application. By analyzing the directional conversion characteristics of bevel gear transmissions, they proposed converting the horizontal rotational motion of the power tool into a vertical output, while simultaneously incorporating a lifting mechanism to provide auxiliary support, thus creating a spatial orthogonal transmission scheme.

[0042] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, based on the above design concept, this application proposes a bolt-driving conversion device for narrow spaces, including a conversion mechanism 100 and a lifting mechanism 200. The conversion mechanism 100 consists of a mounting base plate 110, a conversion housing 120, a first bevel gear transmission mechanism 130, a second bevel gear transmission mechanism 140, a transmission sleeve 150 that can cooperate with an electric tightening gun, and a tightening sleeve 160 for accommodating bolts / screws. The bottom of the mounting base plate 110 is provided with the lifting mechanism 200, and the top is provided with the conversion housing 120. The front side wall and the top of the conversion housing 120 are respectively provided with the meshing first bevel gear transmission mechanism 130 and the second bevel gear transmission mechanism 140. The front end of the first bevel gear transmission mechanism 130 is provided with the transmission sleeve 150, and the top of the second bevel gear transmission mechanism 140 is provided with the tightening sleeve 160.

[0043] The conversion mechanism 100 is a mechanical structure that realizes the conversion of power direction. Specifically, it uses a mounting base plate 110 as the basic support component and a conversion housing 120 as the mounting frame for the transmission assembly. Power transmission from horizontal to vertical is achieved through two sets of orthogonal bevel gear mechanisms. The lifting mechanism 200 is a drive device that provides vertical auxiliary support. It can use a cylinder in conjunction with a lifting rod to apply an upward supporting force to the conversion mechanism 100 during tightening. The first bevel gear transmission mechanism 130 is a horizontally arranged bevel gear transmission assembly, with its front-end transmission sleeve 150 used to connect to the power tool for input rotational power. The second bevel gear transmission mechanism 140 is a vertically arranged bevel gear transmission assembly that converts horizontal rotation to vertical rotation output through gear meshing, driving the top tightening sleeve 160 to complete bolt tightening.

[0044] Specifically, the external electric tightening gun drives the transmission sleeve 150 to rotate horizontally, transmitting power to the conversion housing 120 via the first bevel gear transmission mechanism 130. The engaging second bevel gear transmission mechanism 140 converts the horizontal rotation to vertical rotation, causing the tightening sleeve 160 to apply tightening force to the bolts. The lifting mechanism 200 provides vertical support during operation, ensuring stable contact between the conversion mechanism and the workpiece. This device changes the direction of force application through an orthogonal transmission structure, allowing the operator to complete the tightening of bottom bolts from the front of the equipment.

[0045] Compared to existing technologies, traditional methods require operators to enter the bottom of the equipment or disassemble parts for work. This solution, however, utilizes a spatial orthogonal transmission design to convert the bottom-fastening action into front-facing operation. Existing tools cannot change the direction of power output; this device uses a bevel gear set to achieve 90-degree power steering, working in conjunction with the lifting mechanism 200 to form a stable operating system, avoiding the need for additional procedures.

[0046] Through the above technical solution, this application achieves frontal operation of bottom bolts in narrow spaces, eliminating blind spots where manual operation is impossible. During production, there is no need to adjust the assembly sequence or add auxiliary processes; multi-directional bolt tightening can be completed in a single operation, effectively shortening the production cycle and reducing labor costs. This device is particularly suitable for bottom bolt assembly scenarios in automotive radiator bracket products, solving the efficiency bottleneck problem caused by traditional operation methods.

[0047] In some of these embodiments, such as Figure 5 and Figure 6 As shown, this application further proposes that the conversion box 120 is a square frame structure, with a first transmission mounting hole 121 on its front side wall and a second transmission mounting hole 122 on its top. The first transmission mounting hole 121 is equipped with a first double bearing seat 132 on the first bevel gear transmission mechanism 130, and the second transmission mounting hole 122 is equipped with a second double bearing seat 142 on the second bevel gear transmission mechanism 140.

[0048] The square frame structure refers to a geometrically stable frame structure composed of four side walls and a top wall. Specifically, it can be a welded or bolted steel frame structure, with an internal cavity to accommodate the transmission mechanism. This structure provides rigid support through evenly distributed wall panels, resisting torsional deformation generated during transmission. The first double bearing housing 132 refers to a conventionally known mounting base containing two parallel rolling bearings. It can be embedded in the first transmission mounting hole 121 using an interference fit or flange fixing method, constraining the radial displacement of the first transmission shaft 131 through double-point support. The structure and installation method of the second double bearing housing 142 are the same as the first double bearing housing 132; after being embedded in the second transmission mounting hole 122, it forms an axial constraint on the second transmission shaft 141.

[0049] In some of these embodiments, such as Figure 5 and Figure 6 As shown, this application further proposes that an inspection port 123 be provided on the rear wall of the conversion box 120, and observation ports 124 be provided on the left and right side walls respectively. An inspection baffle 125 can be detachably installed at the upper opening of the inspection port 123, and a transparent observation window 126 can be detachably installed at both observation ports 124.

[0050] Among them, the inspection port 123 refers to the opening structure set on the rear wall of the enclosure, which can be implemented as a rectangular or circular hole, to provide a maintenance passage for the internal transmission components. The observation port 124 refers to the windows symmetrically opened on the side wall of the enclosure, to form a visual operation monitoring area. The maintenance baffle 125 refers to the removable plate covering the inspection port, which can be fixed with bolts or clips, for quick disassembly and restoration of the enclosure's airtightness during maintenance. The transparent observation window 126 refers to the transparent component embedded in the observation port, which can be implemented as a transparent acrylic sheet or a double-layered laminated glass structure, to resist external impacts and maintain clear observation.

[0051] In addition, such as Figure 1 , Figure 2 and Figure 5 As shown, this application further proposes that a stop block 170 is installed at the lower position of the maintenance port 123 corresponding to the conversion box 120 on the mounting base plate 110, and a temporary storage seat 180 is provided at the rear end and / or both sides of the mounting base plate 110. The side wall and / or top of the temporary storage seat 180 are respectively provided with a first bolt storage hole 181 and a second bolt storage hole 182.

[0052] The stop block 170 refers to a limiting component located directly below and on the outer side of the inspection port 123. Specifically, it can be a metal block welded or bolted to the mounting base plate 100, cooperating with the upper inspection baffle 125 to seal the inspection port 123. The temporary storage seat 180 refers to a fixed structure with storage holes. Specifically, it can be a metal base with through holes. The first bolt storage hole 181 on its side wall is used for horizontal bolt insertion, and the second bolt storage hole 182 on its top is used for vertical bolt placement.

[0053] In some of these embodiments, such as Figure 5 and Figure 6 As shown, this application further proposes a first bevel gear transmission mechanism 130 including a first transmission shaft 131, a first double bearing seat 132 and a first bevel gear 133. The first transmission shaft 131 is horizontally mounted on the front side wall of the conversion housing 120 through the first double bearing seat 132. Its front end is detachably connected to the transmission sleeve 150 and its rear end is fixedly connected to the first bevel gear 133.

[0054] The first drive shaft 131 is a rigid shaft used to transmit rotational power. Its lateral installation is such that the power input direction is perpendicular to the front wall of the conversion housing, establishing a horizontal axial power transmission reference in the design. The first double bearing housing 132 is a support structure containing two rolling bearings, specifically achieved by assembling a deep groove ball bearing with a flange seat. This double-point support constrains the radial displacement of the drive shaft, reducing radial runout. The detachable transmission sleeve uses a quick-change coupling structure, specifically achieved by a hexagonal hole engaging with a hexagonal shaft at the end of the transmission sleeve, enabling rapid adaptation to different specifications of electric tightening guns. The fixed connection of the first bevel gear 133 refers to a mechanical connection via a keyway and a locking nut, specifically achieved by a flat key with a shoulder positioning structure, forming a stable power output interface in the design.

[0055] Specifically, the horizontally arranged first drive shaft 131 forms a stable rotation axis through the first double bearing seat 132. The rotational power output by the electric tightening gun is transmitted to the front end of the drive shaft via the transmission sleeve 150, and then transmitted to the rear end first bevel gear 133 through the shaft body. The double bearing seat's double-point support structure effectively suppresses radial vibration of the drive shaft during high-speed rotation, ensuring the stability of the bevel gear meshing transmission. The front end adopts a detachable coupling structure, allowing the operator to quickly change transmission sleeves with different interface specifications according to the on-site working conditions, avoiding work interruptions caused by tool interface mismatch. The fixed connection of the rear end first bevel gear 133 forms a rigid power output end, and a 90-degree change in the power transmission direction is achieved through perpendicular meshing with the second bevel gear 143.

[0056] Through the above technical solutions, this application solves the problem of unstable rotational power transmission in narrow spaces, ensures smooth operation of the transmission shaft through a double bearing support structure, realizes the rapid adaptation function of electric tightening guns of different specifications, avoids work stoppage caused by tool interface incompatibility, and constructs a compact power conversion structure, enabling the device to reliably complete bolt tightening operations even in space-constrained environments.

[0057] Similarly, such as Figure 5 and Figure 6 As shown, this application further proposes a second bevel gear transmission mechanism 140 including a second transmission shaft 141, a second double bearing seat 142, and a second bevel gear 143. The second transmission shaft 141 is vertically mounted on the top of the conversion housing 120 through the second double bearing seat 142. Its upper end is detachably connected to a tightening sleeve 160, and its lower end is fixedly connected to the second bevel gear 143. The second bevel gear 143 meshes with the first bevel gear 133 of the first bevel gear transmission mechanism 130 inside the conversion housing 120.

[0058] The second drive shaft 141 is a rod-shaped component used to transmit rotational power. It can be a hollow or solid shaft structure, and its vertical arrangement enables the conversion of power transmission direction. The second double bearing housing 142 is a support structure installed at both ends of the drive shaft. It can be a combination of deep groove ball bearings and tapered roller bearings, used to distribute radial loads and limit axial displacement during transmission. The detachable connection refers to a quick assembly / disassembly method achieved through threads or snap-fit ​​structures, such as using a hexagonal sleeve with a spring pin for fixing, facilitating the replacement of different sized tightening sleeves 160 according to bolt specifications. The second bevel gear 143 is a transmission component with tapered teeth, which meshes with the first bevel gear 133 to achieve right-angle power transmission.

[0059] Specifically, the second drive shaft 141 is fixed to the top of the conversion housing 120 via the second double bearing seat 142, forming a rigid vertical support. When the electric tightening gun drives the first bevel gear transmission mechanism 130, the first bevel gear 133 drives the second bevel gear 143 to rotate, causing the second drive shaft 141 to generate a vertical torque output. The dual-point support structure of the second double bearing seat 142 can effectively suppress the radial vibration of the second drive shaft 141 under high-speed rotation and prevent axial displacement caused by unilateral force. The tightening sleeve 160 is fixed to the upper end of the second drive shaft 141 via a detachable connection, allowing operators to quickly replace sleeves to fit different bolt sizes without disassembling the entire transmission mechanism. The right-angle meshing design of the bevel gears makes the power transmission path compact, avoiding the interference problems of traditional chain or belt drives in narrow spaces.

[0060] Through the above technical solution, this application solves the stability problem of vertical power transmission in confined spaces. The dual-bearing support structure reduces the drive shaft runout, ensuring torque accuracy during bolt tightening. The detachable connection design allows operators to quickly change the tightening sleeve 160 according to operational needs, accommodating the installation requirements of different bolt sizes. The bevel gear meshing transmission method maintains high transmission efficiency while making the overall structure of the device more compact, suitable for working scenarios with limited bottom or lateral space.

[0061] In some of these embodiments, such as Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, this application further proposes a lifting mechanism 200 including a lifting cylinder 201, a lifting rod 202 and a lifting plate 203. The lifting cylinder 201 is arranged vertically, and its output shaft is connected to the lifting rod 202 through a coupling. The top end of the lifting rod 202 is connected to the lifting plate 203, and the lifting plate 203 is fixedly installed on the bottom of the mounting base plate 110 by bolts.

[0062] The lifting cylinder 101 is a pneumatic actuator that provides vertical driving force. It can be implemented using a single-acting or double-acting cylinder. Its vertical arrangement ensures that the output force direction is consistent with the lifting motion direction, avoiding deviation caused by lateral force. The lifting plate 202 is a load-bearing structure that distributes the lifting force and connects to the mounting base plate 110. It can be implemented using a rectangular metal plate. The lifting force is evenly transmitted to the mounting base plate 110 by bolt fixing, enhancing the overall structural rigidity.

[0063] Specifically, the output shaft of the lifting cylinder 201 is rigidly connected to the lifting rod 202 via a coupling. After the top of the lifting rod 202 is fixed to the lifting plate 203, the lifting plate 203 is connected to the bottom of the mounting base plate 110 via multiple bolts, forming a multi-point force-bearing support structure. When the lifting cylinder 201 is activated, the linear motion of the output shaft is transmitted to the lifting rod 202 via the coupling, causing the lifting plate 203 and the mounting base plate 110 to rise vertically as a whole.

[0064] In addition, such as Figure 2 , Figure 5 and Figure 6 As shown, this application further proposes that the lifting mechanism 200 also includes a limiting sleeve 204 and a limiting guide rod 205, wherein: there are two limiting sleeves 204, which are respectively fixedly installed on the left and right sides of the lifting cylinder 201, and each has a vertically penetrating limiting guide hole; there are two limiting guide rods 205, the lower ends of which are respectively slidably installed in the limiting guide holes of the corresponding limiting sleeves 204, and the top ends are respectively fixedly connected to the left and right ends of the lifting plate 203.

[0065] The limiting sleeve 204 is a cylindrical guide component with an axially penetrating channel. It can be implemented using a smooth-walled metal round or square tube and is fixed to both sides of the lifting cylinder 201 by welding or bolts. Its internal limiting guide hole forms a clearance fit with the limiting guide rod 205, providing rigid guiding constraint for the lifting plate 203's raising and lowering. The limiting guide rod 205 is a sliding component that cooperates with the limiting sleeve 204. It can be implemented using a chrome-plated cylindrical rod and is fixed to both ends of the lifting plate 203 by threaded connection or welding. Its sliding contact surface forms a surface contact with the inner wall of the limiting guide hole, restricting the horizontal degree of freedom of the lifting plate 203 during raising and lowering.

[0066] Specifically, when the lifting cylinder 201 drives the lifting rod 202 to move vertically, the limiting guide rods 205 fixed at both ends of the lifting plate 203 are simultaneously inserted into the corresponding limiting sleeves 204. The two limiting guide rods 205 slide up and down within the guide holes of the limiting sleeves 204, forming a symmetrical double-point guiding structure. This arrangement ensures that the lateral force generated by the lifting plate during lifting is evenly absorbed by the inner wall of the limiting sleeves 204, avoiding deviation of the movement trajectory due to unilateral force. The gap between the limiting guide rods 205 and the guide holes is controlled within the range of 0.1-0.3 mm, ensuring smooth sliding while effectively eliminating horizontal swaying. Through the synchronous guiding action on both sides, the vertical movement axis of the lifting plate 203 and the drive axis of the lifting cylinder 201 always remain aligned.

[0067] In some of these embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, this application further proposes a limiting mechanism 300 disposed on one side of the conversion mechanism 100. The side mounting plate 301 on the limiting mechanism 300 is detachably connected to the lifting cylinder 201 on the lifting mechanism 200 by bolts, and is connected to the top of the mounting base plate by an inverted L-shaped limiting bracket 302.

[0068] The limiting mechanism 300 serves as the mounting base for the conversion mechanism 100 and the lifting mechanism 200. Its upper mounting plate 301 is a plate-like component used to connect the limiting mechanism 300 and the lifting cylinder 201. Specifically, it can be a steel plate with bolt holes, and the axial constraint of the lifting cylinder 201 is achieved through bolt connection. The inverted L-shaped limiting bracket 302 is a right-angle support structure composed of a vertical section and a horizontal section. Specifically, it can be a welded steel component. Its vertical section is fixed to the limiting mechanism 300 by bolts, and its horizontal section extends to the upper side of the conversion mechanism 200 to limit the lifting stroke of the conversion mechanism 100.

[0069] In some specific implementations, such as Figure 3 As shown, this application further proposes that the upper transverse section of the limiting bracket 302 is threaded with an adjustable screw 303 that can be adjusted up and down, and is locked with a nut. The bottom of the adjusting screw 303 is provided with a rubber buffer pad 304.

[0070] The adjusting screw 303 is a rod-shaped component with external threads, secured at the top with a nut. It can be a standard threaded rod or a custom trapezoidal threaded rod. The rotation of the nut is converted into linear displacement of the adjusting screw 303, achieving height adjustment. The rubber buffer pad 304 is a contact component made of elastic material, specifically molded from nitrile rubber or polyurethane. It absorbs mechanical impact energy through material deformation, preventing damage to the workpiece surface caused by rigid contact.

[0071] Specifically, the adjusting screw 303 is threadedly connected to the transverse section of the limiting bracket via a threaded pair. When the operator rotates the screw, its bottom end undergoes a vertical displacement, allowing precise control of the distance between the rubber buffer pad 304 and the workpiece contact surface. When the electric tightening gun is required, the lifting mechanism 200 is simultaneously activated, driving the conversion mechanism 100 to rise. When the mounting base plate 110 contacts the rubber buffer pad 304, the rubber buffer pad 304 deforms under pressure, forming a buffer interface. Its elastic modulus effectively attenuates the vibration energy generated during tightening, while the self-locking characteristic of the threaded structure maintains a stable height position after adjustment.

[0072] Compared with existing technologies, traditional limiting devices mostly use rigid blocks with a fixed height, which cannot adapt to differences in workpiece thickness or installation position, and the metal contact surface is prone to scratching the workpiece. This solution achieves continuous height adjustment through a threaded adjustment mechanism composed of an adjusting screw 303 and a thread, covering a wider range of working conditions. The rubber buffer pad 304 replaces the rigid contact surface, eliminating the risk of hard collision between the tool and the workpiece.

[0073] Combination Figures 1 to 6 As shown, the working principle of the bolt-driving conversion device in a narrow space according to this application is as follows: First, the screw or bolt is placed in the tightening sleeve 160. At this time, the lifting cylinder 201 is still in the retracted state. After all the parts to be assembled are installed, the lifting cylinder 201 is activated to extend and provide an upward force to the tightening machine during the tightening process. At the same time, an external electric tightening gun is inserted into the transmission sleeve 150 to start rotating and tightening. After the transmission sleeve 150 is driven by the first bevel gear transmission mechanism 130 to perform a 90° transmission reversal, it drives the second bevel gear transmission mechanism 140 to rotate, which in turn drives the tightening sleeve 160 to tighten the screw or bolt.

[0074] This structure mainly uses two bevel gears to convert linear rotational motion into 90-degree vertical motion in space, changing the tightening position from the bottom to the front. This reduces the number of installers and procedures, saving time and effort. While ensuring quality, it can significantly reduce costs and improve production efficiency, with the advantages of high operating efficiency and enhanced operational stability.

[0075] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0076] Secondly, the accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0077] Finally, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bolt-driving conversion device for narrow spaces, characterized in that, The system includes a conversion mechanism (100) and a lifting mechanism (200). The conversion mechanism (100) consists of a mounting base plate (110), a conversion housing (120), a first bevel gear transmission mechanism (130), a second bevel gear transmission mechanism (140), a transmission sleeve (150) that can cooperate with an electric tightening gun, and a tightening sleeve (160) for accommodating bolts / screws. The bottom of the mounting base plate (110) is provided with the lifting mechanism (200), and the top is provided with the conversion box (120); the front side wall and the top of the conversion box (120) are respectively provided with the first bevel gear transmission mechanism (130) and the second bevel gear transmission mechanism (140) that are meshed together. The front end of the first bevel gear transmission mechanism (130) is provided with the transmission sleeve (150), and the top of the second bevel gear transmission mechanism (140) is provided with the tightening sleeve (160).

2. The narrow space bolt-driving conversion device according to claim 1, characterized in that, The conversion housing (120) is a square frame structure, with a first transmission mounting hole (121) on its front side wall and a second transmission mounting hole (122) on its top, wherein: The first double bearing seat (132) of the first bevel gear transmission mechanism (130) is installed in the first transmission mounting hole (121), and the second double bearing seat (142) of the second bevel gear transmission mechanism (140) is installed in the second transmission mounting hole (122).

3. The narrow space bolt-driving conversion device according to claim 1, characterized in that, The rear wall of the conversion box (120) is provided with an inspection port (123), and the left and right side walls are respectively provided with observation ports (124), wherein: An inspection baffle (125) can be detachably installed at the upper opening of the inspection port (123), and transparent observation windows (126) can be detachably installed at both of the observation ports (124) on the left and right sides.

4. The narrow space bolt-driving conversion device according to claim 1, characterized in that, A stop (170) is installed on the mounting base plate (110) at the lower position corresponding to the inspection port (123) of the conversion box (120), and A temporary storage seat (180) is provided at the rear end and / or both sides of the mounting base plate (110). The temporary storage seat (180) has a first bolt storage hole (181) and a second bolt storage hole (182) respectively on its side wall and / or top.

5. The narrow space bolt-driving conversion device according to claim 1, characterized in that, The first bevel gear transmission mechanism (130) includes a first transmission shaft (131), a first double bearing housing (132), and a first bevel gear (133), wherein: The first drive shaft (131) is horizontally mounted on the front side wall of the conversion box (120) via the first double bearing seat (132), and its front end is detachably connected to the drive sleeve (150), and its rear end is fixedly connected to the first bevel gear (133).

6. The narrow space bolt-driving conversion device according to claim 1, characterized in that, The second bevel gear transmission mechanism (140) includes a second transmission shaft (141), a second double bearing housing (142), and a second bevel gear (143), wherein: The second drive shaft (141) is vertically mounted on the top of the conversion housing (120) via the second double bearing seat (142). Its upper end is detachably connected to the tightening sleeve (160), and its lower end is fixedly connected to the second bevel gear (143). The second bevel gear (143) meshes with the first bevel gear (133) of the first bevel gear transmission mechanism (130) inside the conversion housing (120).

7. The narrow space bolt-driving conversion device according to claim 1, characterized in that, The lifting mechanism (200) includes a lifting cylinder (201), a lifting rod (202), and a lifting plate (203), wherein: The lifting cylinder (201) is arranged vertically, and its output shaft is connected to the lifting rod (202) through a coupling; the top end of the lifting rod (202) is connected to the lifting plate (203), and the lifting plate (203) is fixedly installed on the bottom of the mounting base plate (110) by bolts.

8. The narrow space bolt-driving conversion device according to claim 7, characterized in that, The lifting mechanism (200) further includes a limiting sleeve (204) and a limiting guide rod (205), wherein: There are two limiting sleeves (204), which are fixedly installed on the left and right sides of the lifting cylinder (201) respectively, and have a limiting guide hole that runs through them. There are two limiting guide rods (205), the lower ends of which are slidably installed in the limiting guide holes of the corresponding limiting sleeves (204), and the top ends are fixedly connected to the left and right ends of the lifting plate (203).

9. The narrow space bolt-driving conversion device according to claim 1, characterized in that, It also includes a limiting mechanism (300) disposed on one side of the conversion mechanism (100), wherein: The side mounting plate (301) on the limiting mechanism (300) is detachably connected to the lifting cylinder (201) on the lifting mechanism (200) by bolts, and is connected to the top limiting connection of the mounting base plate (110) by an inverted L-shaped limiting bracket (302).

10. The narrow space bolt-driving conversion device according to claim 9, characterized in that, The upper transverse section of the limiting bracket (302) is threaded with an adjustable screw (303) that can be adjusted up and down, and a rubber buffer pad (304) is provided at the bottom of the adjusting screw (303).

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