A multi-head screw tightening device for bolted connections

Abstract

The utility model discloses a kind of multi-head tightening devices for bolt installation, it is related to part assembly field, including installation bottom plate, installation top plate and multi-head tightening mechanism, the installation top plate is fixedly connected on installation bottom plate by the protective side plate being arranged on the upper surface edge of installation bottom plate, the upper surface of installation bottom plate is equipped with multi-head tightening mechanism, the multi-head tightening mechanism includes driving tightening shaft, driving large gear, driven pinion, driven tightening shaft and adjusting sleeve, the upper surface center of installation bottom plate is rotatably connected with driving tightening shaft, the driving tightening shaft is rotatably installed and is located in the center of installation bottom plate, the utility model is driven driving large gear by driving tightening shaft, this gear is meshed with synchronous drive multiple driven pinions and the driven tightening shaft connected with it, so that the sleeve structure adjusting sleeve of each driven tightening shaft end can simultaneously efficiently tighten multiple bolts, greatly improve production efficiency, avoid missing twist, and ensure the consistency of operation.

Description

Technical Field

[0001] This utility model relates to the field of parts assembly, specifically a multi-head tightening device for bolt installation. Background Technology

[0002] In modern industrial production, especially in mass production, the assembly of many parts involves the tightening and fixing of bolts. For some specific workpieces, such as structures with multiple bolts distributed on a circumference or other specific array, traditional tightening methods often rely on manual operation or handheld single-axis tightening tools to operate one by one.

[0003] This method of tightening bolts one by one has several drawbacks. First, it is inefficient; the total tightening time increases linearly with the number of bolts, creating a bottleneck on production lines that prioritize high efficiency and high cycle time, thus increasing production time and labor costs per unit. Second, the repeated positioning and operation result in high labor intensity, easily leading to operator fatigue and consequently affecting work quality.

[0004] More importantly, traditional single-point tightening methods struggle to ensure all bolts achieve a consistent and precise preload torque. The tightening torque of different bolts can vary due to operator variations in force, intermittent tool use, or drift in calibration settings. This torque inconsistency affects connection reliability and overall product performance. Furthermore, in multi-bolt sequential tightening operations, there is a risk of missing one or more bolts, posing a safety hazard to product quality, potentially leading to equipment malfunctions or impacting the lifespan and safety of the final product.

[0005] Therefore, we propose a multi-head tightening device for bolt installation. Utility Model Content

[0006] 1. The problem to be solved

[0007] In view of the problems existing in the prior art, the purpose of this utility model is to provide a multi-head tightening device for bolt installation, so as to solve the problems mentioned in the background art.

[0008] 2. Technical Solution

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A multi-head tightening device for bolt installation includes a mounting base plate, a mounting top plate, and a multi-head tightening mechanism. The mounting top plate is fixedly connected to the mounting base plate via a protective side plate located on the upper edge of the mounting base plate. The upper surface of the mounting base plate is provided with the multi-head tightening mechanism, which includes an active tightening shaft, an active large gear, a driven small gear, a driven tightening shaft, and an adjusting sleeve. The active tightening shaft is rotatably connected to the center of the upper surface of the mounting base plate. The active tightening shaft is rotatably mounted and located at the center of the mounting base plate, and further passes through a through hole opened at the center of the mounting top plate. The active large gear is fixedly sleeved on the outer side of the bottom end of the active tightening shaft. Multiple evenly distributed and circumferentially arranged driven small gears are rotatably connected to the upper surface of the mounting base plate. The driven small gears mesh with the active large gears, and the center of each driven small gear is fixedly connected to a driven tightening shaft. The lower end of the driven tightening shaft passes through the mounting base plate, and an adjusting sleeve is connected to the lower end of each driven tightening shaft for contacting the bolt.

[0011] As a further embodiment of this utility model: a limiting bearing sleeve is sleeved on the driven tightening shaft between the driven pinion and the mounting top plate, and a plurality of limiting holes corresponding to the driven tightening shaft and evenly distributed around the circumference are provided on the mounting top plate. The upper end of the limiting bearing sleeve extends into the limiting hole to guide and support the driven tightening shaft.

[0012] As a further embodiment of this utility model: a dustproof shell is provided on the upper surface of the mounting top plate at the position corresponding to each limiting hole, and the dustproof shell is placed on the limiting hole.

[0013] As a further embodiment of this utility model: the active tightening shaft is rotatably mounted on the mounting top plate via a bearing, and a protective cover is provided on the upper surface of the mounting top plate around the protruding part of the active tightening shaft.

[0014] As a further embodiment of this utility model: the lower end of the driven tightening shaft is connected to the corresponding adjusting sleeve through a torque limiting clutch.

[0015] As a further embodiment of this utility model, the end of the adjusting sleeve is formed as a sleeve structure for fitting the head of the bolt.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model uses an active tightening shaft to drive an active large gear. The large gear meshes and synchronously drives multiple driven small gears and connected driven tightening shafts, so that the sleeve structure adjustment sleeve at the end of each driven tightening shaft can simultaneously and efficiently tighten multiple bolts, greatly improving production efficiency, avoiding missed tightening, and ensuring operational consistency.

[0018] 2. To ensure the stable operation of the driven tightening shaft and the durability of the device, this utility model provides a guide support structure consisting of a limit bearing sleeve and a limit hole, and is further protected by a dust cover and a protective cover. The driven tightening shaft is connected to the adjusting sleeve through a torque limiting clutch, which realizes precise control of the tightening torque, effectively preventing damage to bolts or workpieces caused by over-tightening, thereby ensuring the final assembly quality and product safety. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a multi-head tightening device for bolt installation.

[0020] Figure 2 This is a schematic diagram of the internal structure of a multi-head tightening device for bolt installation.

[0021] Figure 3 This is a bottom view schematic diagram of a multi-head tightening device for bolt installation.

[0022] In the diagram: 1. Protective side plate; 2. Limiting hole; 3. Dustproof shell; 4. Mounting top plate; 5. Protective cover; 6. Active tightening shaft; 7. Driven tightening shaft; 8. Adjusting sleeve; 9. Active large gear; 10. Driven small gear; 11. Limiting bearing sleeve; 12. Mounting base plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] Please see Figures 1-3 In this embodiment of the utility model, a multi-head tightening device for bolt installation includes a mounting base plate 12, a mounting top plate 4, and a multi-head tightening mechanism.

[0025] The mounting top plate 4 is fixedly connected to the mounting base plate 12 via a protective side plate 1 located on the edge of the upper surface of the mounting base plate 12. The upper surface of the mounting base plate 12 is provided with a multi-head tightening mechanism, which includes an active tightening shaft 6, an active large gear 9, a driven small gear 10, a driven tightening shaft 7, and an adjusting sleeve 8. The active tightening shaft 6 is rotatably connected to the center of the upper surface of the mounting base plate 12. The active tightening shaft 6 is rotatably mounted and located at the center of the mounting base plate 12, and further passes through the protective side plate 10 located on the edge of the upper surface of the mounting base plate 12. The top plate 4 has a through hole in the center. The bottom outer side of the active tightening shaft 6 is fixedly fitted with an active large gear 9. The upper surface of the mounting base plate 12 is rotatably connected with a plurality of uniformly distributed and circumferentially arranged driven small gears 10. The driven small gears 10 mesh with the active large gear 9, and the center of the driven small gear 10 is fixedly connected with a driven tightening shaft 7. The lower end of the driven tightening shaft 7 passes through the mounting base plate 12. The lower end of each driven tightening shaft 7 is connected with an adjusting sleeve 8, which is used to contact the bolt.

[0026] It should be noted that when the external power drives the active tightening shaft 6 to rotate, the active large gear 9 rotates synchronously. Since multiple driven small gears 10 are uniformly and circumferentially connected to the upper surface of the mounting base plate 12, and each driven small gear 10 meshes with the active large gear 9, the rotation of the active large gear 9 is directly converted into the synchronous rotation of multiple driven small gears 10 through gear meshing, achieving the effect of multi-point simultaneous operation.

[0027] Each driven pinion 10 has a driven tightening shaft 7 fixedly connected to its center. The lower end of the driven tightening shaft 7 passes through the mounting base plate 12 and is connected to an adjusting sleeve 8. The adjusting sleeve 8 is used to directly contact the bolt head and transmit torque. Therefore, the synchronous rotation of the driven pinion 10 is transmitted to its respective driven tightening shaft 7 and adjusting sleeve 8, so that all adjusting sleeves 8 can simultaneously perform tightening actions on their corresponding bolts. This synchronous and parallel working method greatly shortens the total time required to complete the tightening of a group of bolts compared to the traditional operation of tightening bolts one by one, significantly improving production efficiency. When processing workpieces with multiple bolts for batch production, it saves working time and improves work efficiency.

[0028] Furthermore, since all driven tightening shafts 7 are directly driven by the same large driving gear 9 through a mechanical structure, their tightening actions are highly consistent in terms of time and rotational behavior. As long as the mechanism is activated, all adjusting sleeves 8 will operate in a preset manner, avoiding the possibility of missing one or more bolts due to negligence during manual operation. This ensures the integrity of the assembly, improves the reliability and safety of the product, and helps to improve the problem of uneven preload caused by differences in manual operation, thereby improving the assembly quality of the final product.

[0029] A limiting bearing sleeve 11 is fitted onto the driven tightening shaft 7, located between the driven pinion 10 and the mounting top plate 4. The mounting top plate 4 has multiple limiting holes 2 corresponding to the driven tightening shaft 7 and evenly distributed circumferentially. The upper end of the limiting bearing sleeve 11 extends into the limiting hole 2 to guide and support the driven tightening shaft 7. A dustproof shell 3 is provided on the upper surface of the mounting top plate 4 at the position corresponding to each limiting hole 2. This dustproof shell 3 covers the limiting hole 2 and effectively prevents dust, chips, and other external impurities from entering the limiting hole 2 and the mating area of ​​the limiting bearing sleeve 11, thereby maintaining... The cleaning and lubrication of the guiding mechanism ensures its long-term stable and reliable operation. The active tightening shaft 6 is rotatably mounted on the mounting top plate 4 via bearings, and a protective cover 5 is provided on the upper surface of the mounting top plate 4 around the protruding part of the active tightening shaft 6. The protective cover 5 can not only prevent external debris from entering the bearing area, but also provide a certain degree of safety protection for the operator. The lower end of the driven tightening shaft 7 is connected to the corresponding adjusting sleeve 8 through a torque limiting clutch. The end of the adjusting sleeve 8 is formed into a sleeve structure for fitting the bolt head, reducing slippage and improving the accuracy and efficiency of the tightening operation.

[0030] It should be noted that, in order to further ensure the stability of the driven tightening shaft 7 when rotating at high speed or subjected to radial force, in the assembled state, the upper end of the limiting bearing sleeve 11 will extend into the corresponding limiting hole 2, providing precise guidance and strong radial support for the driven tightening shaft 7, preventing the shaft from shaking or deviating during operation, ensuring that the adjusting sleeve 8 can be accurately aligned with the bolt and apply torque stably, and also extending the service life of related components.

[0031] To achieve better control over bolt tightening torque and prevent damage to bolts or workpiece threads due to excessive torque, the lower end of the driven tightening shaft 7 is not directly rigidly connected to the adjusting sleeve 8. Instead, it is connected to the corresponding adjusting sleeve 8 through a torque limiting clutch (the specific structure is not shown in the figure; it is a module for achieving a specific function). When the torque transmitted to the bolt by the adjusting sleeve 8 reaches a preset threshold, the torque limiting clutch will automatically slip or disengage, interrupting the power transmission from the driven tightening shaft 7 to the adjusting sleeve 8. This ensures that each bolt can be tightened to the appropriate torque value, avoiding under-tightening or over-tightening, and guaranteeing assembly quality and product safety.

[0032] In summary, this multi-head tightening device drives the active large gear 9 through the active tightening shaft 6. The large gear meshes and synchronously drives multiple driven small gears 10 and connected driven tightening shafts 7, enabling the sleeve structure adjustment sleeve 8 at the end of each driven tightening shaft 7 to simultaneously and efficiently tighten multiple bolts, greatly improving production efficiency, avoiding missed tightening, and ensuring operational consistency.

[0033] To ensure the stable operation of the driven tightening shaft 7 and the durability of the device, a guide support structure consisting of a limit bearing sleeve 11 and a limit hole 2 is provided, and it is further protected by a dust cover 3 and a protective cover 5. The driven tightening shaft 7 is connected to the adjusting sleeve 8 through a torque limiting clutch, which realizes precise control of the tightening torque, effectively preventing damage to bolts or workpieces caused by over-tightening, thereby ensuring the final assembly quality and product safety.

[0034] 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 and improvements 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 multi-head tightening device for bolt installation, characterized in that, include: Install base plate (12); The mounting top plate (4) is fixedly connected to the mounting base plate (12) by a protective side plate (1) set on the edge of the upper surface of the mounting base plate (12); A multi-head tightening mechanism is provided on the upper surface of the mounting base plate (12). The multi-head tightening mechanism includes an active tightening shaft (6), an active large gear (9), a driven small gear (10), a driven tightening shaft (7), and an adjusting sleeve (8). The active tightening shaft (6) is rotatably connected to the center of the upper surface of the mounting base plate (12). The active tightening shaft (6) is rotatably mounted and located at the center of the mounting base plate (12), and further passes through a through hole opened at the center of the mounting top plate (4). The bottom outer side is fixedly fitted with a large driving gear (9), and the upper surface of the mounting base plate (12) is rotatably connected with a plurality of uniformly distributed and circumferentially arranged driven small gears (10). The driven small gears (10) mesh with the large driving gear (9), and the center of the driven small gears (10) is fixedly connected with a driven tightening shaft (7). The lower end of the driven tightening shaft (7) passes through the mounting base plate (12), and the lower end of each driven tightening shaft (7) is connected with an adjusting sleeve (8). The adjusting sleeve (8) is used to contact the bolt. The driven tightening shaft (7) is fitted with a limiting bearing sleeve (11) located between the driven pinion (10) and the mounting top plate (4), and the mounting top plate (4) is provided with a plurality of limiting holes (2) that correspond to the driven tightening shaft (7) and are evenly distributed in a circular pattern. The upper end of the limiting bearing sleeve (11) extends into the limiting hole (2) to guide and support the driven tightening shaft (7). The lower end of the driven tightening shaft (7) is connected to the corresponding adjusting sleeve (8) via a torque limiting clutch.

2. The multi-head tightening device for bolt installation according to claim 1, characterized in that, A dust cover (3) is provided on the upper surface of the mounting plate (4) at the position corresponding to each limiting hole (2), and the dust cover (3) covers the limiting hole (2).

3. A multi-head tightening device for bolt installation according to claim 1, characterized in that, The active tightening shaft (6) is rotatably mounted on the mounting top plate (4) via a bearing, and a protective cover (5) is provided on the upper surface of the mounting top plate (4) around the protruding part of the active tightening shaft (6).

4. A multi-head tightening device for bolt installation according to claim 1, characterized in that, The end of the adjusting sleeve (8) is formed as a sleeve structure for fitting the bolt head.

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