Nut assembling mechanism with torsion control

Abstract

The utility model discloses a nut assembling mechanism with torsion control, which comprises a mounting frame, a sliding table cylinder is vertically arranged on the mounting frame, a mounting plate is arranged on the sliding table cylinder, a servo motor is vertically arranged on the upper portion of the mounting plate, a working shaft of the servo motor is vertically downward, and the working shaft of the servo motor is vertically downward. A torsion sensor is arranged on the mounting plate, a working shaft of the servo motor is rotationally connected with the torsion sensor, a connecting shaft is arranged at the lower end of the working shaft of the servo motor, the lower end of the working shaft of the servo motor is fixedly connected with the upper end of the connecting shaft through a coupler, and an assembling disc is arranged at the lower end of the connecting shaft; nut grooves matched with nuts are formed in the bottom face of the assembly disc. The nut assembling mechanism with the torsion control function is used for assembling a nut and a stud, particularly assembling a special-shaped nut and the stud, and the torsion and the height position are controllable when the nut is assembled.

Description

Technical Field

[0001] The utility model relates to a nut assembly mechanism with torque control, belonging to the technical field of nut assembly jigs. Background Art

[0002] The production of some products involves the assembly process of studs and nuts, especially the assembly of some special-shaped nuts and studs. If manual assembly is used, the production efficiency will be low, and the special-shaped nuts are difficult to operate using ordinary tools. Therefore, a corresponding assembly mechanism is needed to replace manual operation. At the same time, the assembly of these special-shaped nuts and studs has very high requirements on the torque and nut position during assembly. To ensure that the nuts are assembled to the appropriate position and height, ordinary assembly jigs and manual operations are difficult to meet the assembly requirements.

[0003] The patent with the authorization announcement number CN 205129337 U discloses a bolt and nut assembly device, including a workbench, a motor, a driving pulley and an assembly mechanism, wherein the driving pulley is mounted on the output shaft of the motor, the assembly mechanism includes a transmission shaft, a driven pulley, a mold fixing sleeve, a mold fixing seat and a finished tool, the driven pulley is mounted on the transmission shaft, the driven pulley is linked with the driving pulley, the transmission shaft is mounted on the workbench through a bearing, one end of the mold fixing sleeve is sleeved on one end of the transmission shaft and fixedly connected to the transmission shaft, the other end of the mold fixing sleeve is fixedly installed with the mold fixing seat, the finished tool is installed in the mold fixing seat, and the outer end of the finished tool is provided with a nut placement hole coaxial with the transmission shaft. The assembly device can improve the assembly efficiency of bolts and nuts, reduce labor intensity and operate safely and reliably. However, the assembly device is not suitable for the assembly of special-shaped nuts and studs, and cannot accurately control the torque and height position of the nut during assembly. Utility Model Content

[0004] The technical problem mainly solved by the utility model is to provide a nut assembly mechanism with torque control, which is used for assembling nuts and studs, especially assembling special-shaped nuts and studs, and the torque and height position of the nut during assembly are controllable.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: to provide a nut assembly mechanism with torque control, which is used to assemble the nut to the stud, including a mounting frame, a slide cylinder is vertically arranged on the mounting frame, a mounting plate is arranged on the slide cylinder, a servo motor is vertically arranged on the upper part of the mounting plate, the working shaft of the servo motor is vertically downward, a torque sensor is arranged on the mounting plate, the working shaft of the servo motor is rotatably connected to the torque sensor, a connecting shaft is arranged at the lower end of the working shaft of the servo motor, the lower end of the working shaft of the servo motor is fixedly connected to the upper end of the connecting shaft through a coupling, an assembly disk is arranged at the lower end of the connecting shaft, and a nut groove matching the nut is arranged on the bottom surface of the assembly disk.

[0006] Preferably, a bearing seat is provided on the mounting plate, and the connecting shaft is mounted on the bearing seat.

[0007] Preferably, a laser displacement sensor is provided on the mounting plate, and the laser displacement sensor is located above the assembly disk.

[0008] Preferably, the assembly disk is fixed on a connecting sleeve, and the connecting sleeve is detachably mounted on the connecting shaft.

[0009] Preferably, the connecting sleeve is arranged on the connecting shaft, and a fastening screw is provided on the connecting sleeve, and the fastening screw fastens the connecting sleeve and the connecting shaft together.

[0010] The beneficial effects of the utility model are as follows: the nut assembly mechanism with torque control of the utility model is used for the assembly of nuts and studs, especially the assembly of special-shaped nuts and studs. By setting a torque sensor and a laser displacement sensor, the torque and height position during nut assembly can be accurately controlled. The servo motor is used as the driving power to control the number of rotations during nut assembly, and the laser displacement sensor is used to control the assembly height position of the nut on the stud. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0012] Figure 1 It is a structural schematic diagram of a nut assembly mechanism with torque control in an embodiment of the utility model;

[0013] Figure 2 The utility model is a structural schematic diagram of an assembly disk in a nut assembly mechanism with torque control. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] See also Figure 1 and Figure 2 , an embodiment of the utility model includes: a nut assembly mechanism with torque control, which includes a mounting frame 1, a slide cylinder 2 is vertically arranged on the mounting frame 1, a mounting plate 3 is arranged on the slide cylinder 2, a servo motor 4 is vertically arranged on the upper part of the mounting plate 3, a working shaft 5 of the servo motor 4 is vertically downward, a torque sensor 6 is arranged on the mounting plate 3, the working shaft 5 of the servo motor 4 is rotationally connected to the torque sensor 6, the torque sensor 6 is in signal communication with the servo motor 4, a connecting shaft 7 is arranged at the lower end of the working shaft 5 of the servo motor 4, the lower end of the working shaft of the servo motor 4 is fixedly connected to the upper end of the connecting shaft 7 by a coupling 8, an assembly disk 9 is arranged at the lower end of the connecting shaft 7, and a nut groove 10 matching the nut to be assembled is arranged on the bottom surface of the assembly disk 9.

[0016] Preferably, a bearing seat 11 is provided on the mounting plate 3 , and the connecting shaft 7 is mounted on the bearing seat 11 .

[0017] Preferably, a laser displacement sensor 12 is provided on the mounting plate 3 , and the laser displacement sensor 12 is located above the assembly disk 9 . The laser displacement sensor 12 is in signal communication with the servo motor 4 .

[0018] Preferably, the assembly disk 9 is fixed on a connecting sleeve 13 , and the connecting sleeve 13 is detachably mounted on the connecting shaft 7 .

[0019] Preferably, the connecting sleeve 13 is sleeved on the connecting shaft 7, and a fastening screw 14 is provided on the connecting sleeve 13, and the fastening screw 14 fastens the connecting sleeve 13 and the connecting shaft 7 together. The connecting sleeve 13 is detachable, which is convenient for replacing the assembly disk 9. When assembling different nuts, the assembly disk 9 can be replaced, thereby expanding the application range of the assembly mechanism.

[0020] When the nut assembly mechanism with torque control of the utility model is used, the stud 15 to be assembled is fixed on the stud clamp 16, the stud clamp 16 is placed under the assembly disk 9, the assembled nut is placed in the nut groove 10 of the assembly disk 9, the slide cylinder 2 drives the mounting plate 3 to move downward, the servo motor 4 and the assembly disk 9 move downward accordingly, the assembly disk 9 approaches the stud 15, the servo motor 4 works to drive the connecting shaft 7 and the connecting sleeve 13, and the assembly disk 9 to rotate, and the nut is rotated and assembled on the stud 15 at the same time, the laser displacement sensor 12 senses the height position change of the assembly disk 9 and feeds back the signal to the servo motor 4, the torque sensor 6 senses the torque change of the working shaft 5 of the servo motor 4, when the nut is assembled in place on the stud 15 and the height is in place, if the nut continues to rotate, it will be blocked, and the working shaft 5 of the servo motor 4 will be blocked by a large torque, at this time the servo motor 4 stops working and the nut is no longer rotated; after the nut height is in place, the servo motor 4 also stops working, and the servo motor 4 can control the number of rotations of the motor working shaft. In this way, the nut can be accurately assembled on the stud, with high work efficiency and good assembly accuracy.

Claims

1. A nut assembly mechanism with torque control, used for assembling a nut onto a stud, comprising a mounting frame, a slide cylinder is vertically arranged on the mounting frame, and a mounting plate is arranged on the slide cylinder, characterized in that: A servo motor is vertically arranged on the upper part of the mounting plate, and the working shaft of the servo motor is vertically downward. A torque sensor is arranged on the mounting plate, and the working shaft of the servo motor is rotatably connected to the torque sensor. A connecting shaft is arranged at the lower end of the working shaft of the servo motor, and the lower end of the working shaft of the servo motor is fixedly connected to the upper end of the connecting shaft through a coupling. An assembly disk is arranged at the lower end of the connecting shaft, and a nut groove matching the nut is arranged on the bottom surface of the assembly disk.

2. The nut assembly mechanism with torque control according to claim 1, characterized in that: A bearing seat is arranged on the mounting plate, and the connecting shaft is mounted on the bearing seat.

3. The nut assembly mechanism with torque control according to claim 2, characterized in that: A laser displacement sensor is arranged on the mounting plate and is located above the assembly disk.

4. The nut assembly mechanism with torque control according to claim 3, characterized in that: The assembly disk is fixed on a connecting sleeve, and the connecting sleeve is detachably mounted on the connecting shaft.

5. The nut assembly mechanism with torque control according to claim 4, characterized in that: The connecting sleeve is arranged on the connecting shaft, and a fastening screw is arranged on the connecting sleeve, and the fastening screw fastens the connecting sleeve and the connecting shaft together.

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