CN219094268U

CN219094268U - Automatic distance-adjusting double-shaft screwing device

Info

Publication number: CN219094268U
Application number: CN202320176063.7U
Authority: CN
Inventors: 陈岚; 刘强; 李寒菊; 韩立华; 刘毅; 李尚泽
Original assignee: Xuzhou XCMG Foundation Construction Machinery Co Ltd
Current assignee: Xuzhou XCMG Foundation Construction Machinery Co Ltd
Priority date: 2023-02-03
Filing date: 2023-02-03
Publication date: 2023-05-30
Anticipated expiration: 2033-02-03

Abstract

The utility model discloses an automatic distance-adjusting double-shaft tightening device, which comprises a fixed frame and a pair of electric tightening shafts vertically arranged on the top surface of the fixed frame, wherein the fixed frame is provided with a plurality of screws; the tail end of the electric tightening shaft extends into the fixed frame and is arranged on a driving device in the fixed frame, a sleeve is connected below the electric tightening shaft, and the sleeve is used for being matched with a part to be tightened; a servo motor is arranged between the two electric tightening shafts and is connected with a driving device inside the fixed frame. This scheme can accurate adjustment two electronic intervals of tightening the axle, once can screw up two bolts simultaneously, improves assembly efficiency, can realize that the bolt is automatic to be screwed up, reduces personnel's operation.

Description

Automatic distance-adjusting double-shaft screwing device

Technical Field

The utility model relates to engineering machinery process equipment, in particular to an automatic distance-adjusting double-shaft tightening device.

Background

In the engineering machinery, bolts with high requirements on tightening torque precision are assembled and tightened by using a single-shaft fixed-torque tightening shaft, and time consumption is long for a large number of bolts. The screw shaft is required to be manually controlled in the screwing process, when the bolt installation foundation surface has a certain height, the screw shaft is required to be manually lifted frequently to screw the bolt, the lifting force of the screw shaft is required to be overcome, and the labor intensity of workers is excessive. Therefore, the assembly process equipment is required to be designed, the manual operation can be replaced to screw the bolts, the bolts can be automatically screwed through programming and visual identification, the time can be saved, the assembly efficiency can be improved, the assembly quality can be ensured, and the operation of personnel can be reduced.

Disclosure of Invention

The utility model aims to: the utility model aims to provide an automatic distance-adjusting double-shaft tightening device which can realize automatic tightening of bolts and can accurately adjust the distance between two tightening shafts so as to be suitable for tightening different workpieces.

The technical scheme is as follows: the utility model comprises a fixed frame and a pair of electric tightening shafts vertically arranged on the top surface of the fixed frame; the tail end of the electric tightening shaft extends into the fixed frame and is arranged on a driving device in the fixed frame, a sleeve is connected below the electric tightening shaft, and the sleeve is used for being matched with a part to be tightened; a servo motor is arranged between the two electric tightening shafts and is connected with a driving device inside the fixed frame.

The fixed frame comprises an outer frame, a speed reducer arranged in the outer frame, lead screws respectively arranged at the output ends of two sides of the speed reducer, a sliding seat sleeved on the lead screws, a lower sliding rail fixedly arranged on the bottom surface of the outer frame below the sliding seat, and the sliding seat is matched with the lower sliding rail; the electric tightening shaft is arranged on the sliding seat; the upper part of the speed reducer is connected with a servo motor; after product signal information is input from the outside, the servo motor drives the speed reducer to rotate to drive the screw rod to move with the sliding seat, so that the distance between output shafts at the lower end of the electric tightening shaft is adjusted, accurate distance variation is achieved, and the tightening shaft distance is switched.

The top surface of the fixed frame is provided with a transition tray for connecting an external truss system or a robot system.

And one end of the bottom surface of the fixed frame is provided with a plurality of proximity switches for detecting the limit position of the movement of the sliding seat and as a physical reference during the calibration interval, so that the sliding seat is prevented from exceeding the limit position, and the stability of the tightening device is ensured.

The 3D vision device is arranged on the bottom surface of the fixed frame, deviation of the workpiece can be identified, accurate positioning of the workpiece is achieved, and the tightening device is guided to conduct tightening work according to a set program.

The beneficial effects are that: compared with the prior art, the technical scheme of the utility model has the beneficial effects that: can accurate adjustment two electronic intervals of screwing up axle (or sleeve), screw up two bolts simultaneously once, improve assembly efficiency, practice thrift assembly time, through settlement procedure and 3D vision device, can realize that the bolt is automatic to be screwed up.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic view of the internal structure of the fixing frame.

Detailed Description

The technical scheme of the utility model is described in detail below with reference to the detailed description and the attached drawings.

As shown in fig. 1, the tightening device of the present utility model includes the following portions: the device comprises a transition tray 1, a fixed frame 2, a sleeve 3, a servo motor 4, an electric tightening shaft 5, a 3D vision device 6 and a proximity switch 7. The top surface of the fixed frame 2 is provided with a transition tray 1, and the transition tray 1 is used for connecting an external truss system or a robot system. The top surface of the fixed frame 2 is also vertically provided with a pair of electric tightening shafts 5, the tail ends of the electric tightening shafts 5 extend into the fixed frame 2 and are arranged on a driving device in the fixed frame 2, and the distance between the two electric tightening shafts 5 can be changed when the driving device acts. The sleeve 3 is connected below the electric tightening shaft 5, the electric tightening shaft 5 is coaxially connected with the sleeve 3, the sleeve 3 is used for being matched with a part to be tightened, and the sleeve 3 adopted in the scheme can be matched with the end parts of fasteners of different specifications. A servo motor 4 is arranged between the two electric tightening shafts 5, and the servo motor 4 is connected with a driving device inside the fixed frame 2 to provide driving force for the fixed frame. A plurality of proximity switches 7 are installed to fixed frame 2 bottom surface one end, and in this scheme, proximity switch 7's quantity is three, and the proximity switch in centre is as the physical benchmark when calibrating the interval, and proximity switch in both sides is used for detecting the biggest and minimum extreme position of seat of sliding, prevents to slide the seat and surpasses extreme position, guarantees to screw up device stability. A 3D vision device 6 is installed on the bottom surface of the fixed frame 2, and is used for guiding the tightening device to the part to be tightened.

As shown in fig. 2, the fixed frame 2 includes an outer frame 21, a speed reducer 24 is installed inside the outer frame 21, a screw rod 23 is installed at output ends on two sides of the speed reducer 24, a sliding seat 25 is sleeved on each screw rod 23, a lower sliding rail 22 is fixedly installed on the bottom surface of the outer frame 21 below the sliding seat 25, and the sliding seat 25 can move along the lower sliding rail 22. The electric tightening shaft 5 is arranged on the sliding seat 25, the top end of the sleeve 3 extends into the outer frame 21 and is coaxially connected with the lower end of the electric tightening shaft 5, and the sleeve 3 rotates along with the electric tightening shaft 5, so that the screw bolt is screwed. The upper part of the speed reducer 24 is connected with the servo motor 4, the servo motor 4 drives the speed reducer 24 to rotate after product signal information is input from the outside, two screw rods 23 on two sides of the speed reducer 24 are driven to rotate simultaneously, and the sliding seat 25 starts to move, so that the output shaft distance of the lower end of the electric tightening shaft is adjusted, the accurate distance variation is achieved, and the tightening shaft distance is switched.

The working process of the tightening device is as follows: the transition tray can be connected with a truss system or a robot system, the truss/robot drives the tightening device to take a picture of the position of a bolt to be tightened with a 3D vision device, the deviation of a workpiece and the accurate positioning of the workpiece can be identified, and the tightening device is guided to carry out tightening work according to a set program; photographing the next group of positions after the tightening is finished, and repeatedly tightening the truss/robot with a tightening device; after the screwing is completed, the original point is returned, the whole process is fully automatic, the assembly efficiency is improved, and the assembly quality is ensured.

Claims

1. An automatic distance-adjusting double-shaft tightening device is characterized in that: comprises a fixed frame (2) and a pair of electric tightening shafts (5) vertically arranged on the top surface of the fixed frame (2); the tail end of the electric tightening shaft (5) extends into the fixed frame (2) and is arranged on a driving device in the fixed frame, a sleeve (3) is connected below the electric tightening shaft (5), and the sleeve (3) is used for being matched with a part to be tightened; a servo motor (4) is arranged between the two electric tightening shafts (5), and the servo motor (4) is connected with a driving device inside the fixed frame (2).

2. The automatic pitch-adjusting double-shaft tightening device according to claim 1, wherein: the fixed frame (2) comprises an outer frame (21), a speed reducer (24) arranged in the outer frame (21), a screw rod (23) is respectively arranged at the output ends of two sides of the speed reducer (24), a sliding seat (25) is sleeved on the screw rod (23), a lower sliding rail (22) is fixedly arranged on the bottom surface of the outer frame (21) below the sliding seat (25), and the sliding seat (25) is matched with the lower sliding rail (22); the electric tightening shaft (5) is arranged on the sliding seat (25); the upper part of the speed reducer (24) is connected with the servo motor (4).

3. The automatic pitch-adjusting double-shaft tightening device according to claim 1, wherein: the top surface of the fixed frame (2) is provided with a transition tray (1) for connecting an external truss system or a robot system.

4. The automatic pitch-adjusting double-shaft tightening device according to claim 2, wherein: and one end of the bottom surface of the fixed frame (2) is provided with a plurality of proximity switches (7) for detecting the limit position of the movement of the sliding seat (25) and taking the limit position as a physical reference in the process of calibrating the spacing.

5. The automatic pitch-adjusting double-shaft tightening device according to claim 1, wherein: the bottom surface of the fixed frame (2) is provided with a 3D vision device (6).