Synchronous tightening system based on electric wrench linkage

Abstract

A synchronous tightening system based on electric wrench linkage comprises a plurality of tightening working sets, each tightening working set comprises a handle, a machine shell, a counter-acting force arm, a servo motor and a tightening working head, and the tightening working sets are each provided with a synchronous driving device used for controlling the motor to rotate; the synchronous driving device comprises a control module, a switch module and a communication module, the communication modules on the multiple tightening working groups are subjected to unified closed-loop control through the central control system, and the control module is used for analyzing signals obtained by the communication modules so as to drive the switch module to control starting and stopping of a motor. According to the screw tightening machine, the plurality of screw tightening working heads powered by the servo motor can be synchronously controlled through the central control system, and when a plurality of tightening working groups are mounted on a workpiece surface, the workpiece surface can be stressed at the same time, and the pressed workpiece surface can bear equal external force at the same time.

Description

Technical Field

[0001] The utility model relates to a bolt tightening device, in particular to a servo motor synchronous control bolt tightening system. Background Art

[0002] During the assembly process of mechanical components, there are extremely high requirements for the tightening sequence of bolts. In the prior art, the commonly followed principles include the symmetry principle, the cross-diagonal principle, the principle of gradually increasing torque, etc. The main purpose is to ensure that the components or structural parts can be correctly aligned, so that the parts to be assembled are evenly stressed and the overall stability of the structure is improved.

[0003] However, no matter which assembly method or principle is adopted, there is often a sequence in actual assembly. The existence of the sequence will cause a certain displacement misalignment of the parts to be assembled during the process of rotating and tightening a bolt, thus affecting the final assembly effect. Therefore, the synchronous tightening assembly system has currently become the main research direction of researchers.

[0004] The development of electric servo wrenches has brought a certain design basis for the research and development of synchronous tightening assembly systems. By further improving the existing electric servo wrenches, synchronous tightening can be achieved while maintaining horizontal contact, so as to realize the synchronous progress of the overall assembly environment and maintain the stability and level of the assembly. Content of the Utility Model

[0005] To solve the above technical problems, the technical solution provided by the utility model is: a synchronous tightening system based on the linkage of electric wrenches, including a plurality of tightening working groups. Each tightening working group includes a handle, a housing, a reaction force arm, a servo motor, and a tightening working head. A synchronous driving device for controlling the rotation of the motor is provided on each of the plurality of tightening working groups. The synchronous driving device includes a control module, a switch module, and a communication module. The communication modules on the plurality of tightening working groups are all under unified closed-loop control through a central control system. The control module is used to analyze the signals obtained by the communication module, so as to drive the switch module to control the start and stop of the motor.

[0006] Furthermore, the synchronous driving device is arranged at the rear side of the servo motor.

[0007] Further, a reaction force arm is arranged at one end of the housing close to the output shaft, and the reaction force arm is inclined towards the end close to the output shaft.

[0008] Further, a tightening working head is arranged outside the output shaft, and a bolt hole corresponding to the bolt head is arranged at one end of the tightening working head far from the output shaft.

[0009] Further, the output end of the servo motor is connected to the planetary reduction gearbox through a connecting flange, the output end of the planetary reduction gearbox is connected to the output shaft, and the output shaft extends out of the machine shell.

[0010] Further, the machine shell is arranged on the upper part of the handle.

[0011] The advantages of the present utility model compared with the prior art are as follows: The present utility model can synchronously control multiple bolt tightening working heads powered by servo motors through the central control system. When multiple tightening working groups are installed on the workpiece surface, the workpiece surface can be simultaneously stressed, and the stressed workpiece surface can simultaneously bear equal external forces. In addition, through the setting of the central control system and the communication module, the displacement of the servo motor (angle control) can be controlled to stretch the deformation extrusion of the bolt, ensuring that the workpiece contact surface remains overall horizontal, without generating workpiece deformation during the installation process, and ensuring that the workpiece is not affected by uneven extrusion force generated by tightening, resulting in uneven force when the workpiece terminates tightening. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the tightening working group in a servo motor synchronous control bolt tightening system of the present utility model.

[0013] Figure 2 It is a schematic structural diagram of the bolt hole in a servo motor synchronous control bolt tightening system of the present utility model.

[0014] Figure 3 It is a schematic internal structural diagram of the tightening working group in a servo motor synchronous control bolt tightening system of the present utility model.

[0015] Figure 4 It is a schematic diagram of the working state of a servo motor synchronous control bolt tightening system of the present utility model. Detailed Embodiments

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0017] In the description of the embodiments of the present utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0018] In addition, if terms such as "horizontal", "vertical", "hanging" are used, it does not mean that the component is required to be absolutely horizontal or hanging, but it can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but it can be slightly inclined.

[0019] In the description of the embodiments of the present utility model, "a plurality of" represents at least two.

[0020] In the description of the embodiments of the present utility model, it should also be noted that unless otherwise clearly specified and limited, if terms such as "set", "installed", "connected", "connected" are used, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0021] Embodiment:

[0022] Combined with the attached Figures 1-4 , a synchronous tightening system based on the linkage of an electric wrench, includes a plurality of tightening working groups 1. The tightening working group 1 includes a handle 101, a housing 102, a reaction force arm 110, a servo motor 104, and a tightening working head 108; a synchronous driving device 103 for controlling the rotation of the motor is provided on each of the plurality of tightening working groups 1; the synchronous driving device 103 includes a control module, a switch module, and a communication module; the communication modules on the plurality of tightening working groups 1 are all under unified closed-loop control through a central control system. The control module is used to analyze the signals obtained by the communication module, so as to drive the switch module to control the start and stop of the motor. The synchronous driving device 103 is arranged behind the servo motor 104.

[0023] Multiple synchronous drive devices 103 are interconnected through a communication module. When one of the switch modules is manually triggered, the communication module of the triggered synchronous drive device 103 will send an instruction to the communication modules of other synchronous drive devices 103 through an external central control system, causing each communication module to send an instruction to its respective control module to fire the switch module. At this time, the tightening working heads 108 operate simultaneously, so that while maintaining horizontal contact, synchronous tightening can be achieved, thereby realizing the synchronous progress of the overall assembly environment and maintaining the stability and level of the assembly.

[0024] The above describes the present invention and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. In short, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the creation of the present invention, design similar structural manners and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A synchronous tightening system based on the linkage of electric wrenches, comprising a plurality of tightening working groups, wherein each tightening working group includes a handle, a housing, a reaction force arm, a servo motor and a tightening working head, characterized in that, Each of the multiple tightening working groups is provided with a synchronous drive device for controlling the rotation of the motor; the synchronous drive device includes a control module, a switch module, and a communication module; The communication modules on the multiple tightening working groups are all under unified closed-loop control through a central control system. The control module is used to analyze the signals obtained by the communication module, so as to drive the switch module to control the start and stop of the motor; The synchronous drive device is arranged at the rear side of the servo motor; One end of the machine shell close to the output shaft is provided with a reaction force arm, and the reaction force arm is inclined towards the end close to the output shaft; A tightening working head is arranged outside the output shaft, and a bolt hole corresponding to the bolt head is arranged at the end of the tightening working head far from the output shaft; The machine shell is arranged on the upper part of the handle.

2. The synchronous tightening system based on the linkage of an electric wrench according to claim 1, wherein, The output end of the servo motor is connected to the planetary reduction gearbox through a connecting flange, the output end of the planetary reduction gearbox is connected to the output shaft, and the output shaft extends outside the machine shell.

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