CN217452886U

CN217452886U - Bolt tightening mechanism and robot

Info

Publication number: CN217452886U
Application number: CN202220734768.1U
Authority: CN
Inventors: 赖明聪; 赖智宇; 聂灿明
Original assignee: SAIC GM Wuling Automobile Co Ltd
Current assignee: SAIC GM Wuling Automobile Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-20
Anticipated expiration: 2032-03-31

Abstract

The utility model discloses a bolt tightening mechanism and robot, bolt tightening mechanism includes first mounting bracket, a drive arrangement, bar guide part, reciprocating motion portion, first portion of screwing up and the portion of screwing up of second. First mounting bracket is provided with connecting device, in order to be used for being connected with the robot, first drive arrangement installs in the one end of first mounting bracket, the bar guide part is installed on first mounting bracket, reciprocating motion portion installs the nut seat on the lead screw including rotationally installing the lead screw on first mounting bracket and axially movable ground, the lead screw is with bar guide part parallel arrangement, the one end and the pivot of first drive arrangement of lead screw are connected, the nut seat is connected with bar guide part slidable, first portion of screwing up includes the second mounting bracket, first screwing up the axle, second drive arrangement and first sleeve, second mounting bracket rigid coupling is on first mounting bracket, first screwing up the axle rotationally installs on the second mounting bracket, and first screwing up the axle is perpendicular with bar guide part.

Description

Bolt tightening mechanism and robot

Technical Field

The utility model relates to an automobile production line equipment technical field especially relates to a bolt tightening mechanism and robot.

Background

After the exhaust manifold is installed on the gasoline engine, a nut of the exhaust manifold needs to be screwed down by a screwing gun so as to ensure that the exhaust manifold is firmly installed on the engine and avoid air leakage. The rifle is screwed up to artifical handheld unipolar of the general adoption in present trade 8 ~ 9 exhaust manifold nuts, and the problem that many exhaust manifold nuts exist were screwed up to artifical handheld unipolar tightening rifle has: when exhaust manifold's many nuts are screwed up to the unipolar, the back is accomplished in the previous nut tightening, can lead to the preceding nut of accomplishing of screwing up to receive exhaust manifold's reverse pulling force when screwing up next nut again, causes the preceding nut of screwing up to have the moment of torsion decay, and it is higher to appear the quality problem risk, and in addition, the simplex position is screwed up a lot of, and the beat is tight, has the problem of inefficiency.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bolt tightening mechanism and robot, its advantage is reduced the attenuation of nut moment of torsion, reduces artifical manual labor, has promoted production efficiency.

The utility model discloses a bolt tightening mechanism, including first mounting bracket, a drive arrangement, bar guide portion, reciprocating motion portion, first portion and the second portion of screwing up. The first mounting frame is provided with a connecting device for connecting with the robot, the first driving device is arranged at one end of the first mounting frame, the bar-shaped guide part is arranged on the first mounting frame, the reciprocating part comprises a lead screw which is rotatably arranged on the first mounting frame and a nut seat which is axially movably arranged on the lead screw, the lead screw is arranged in parallel with the bar-shaped guide part, one end of the lead screw is connected with a rotating shaft of the first driving device, the nut seat is connected with the bar-shaped guide part in a sliding way, the first tightening part comprises a second mounting frame, a first tightening shaft, a second driving device and a first sleeve, the second mounting frame is fixedly connected on the first mounting frame, the first tightening shaft is rotatably arranged on the second mounting frame, the first tightening shaft is vertical to the bar-shaped guide part, the second driving device is arranged on the second mounting frame, and the rotating shaft of the second driving device is connected with one end of the first tightening shaft, the first sleeve is mounted on the other end of the first tightening shaft. The second tightening portion includes a third mounting bracket fixedly coupled to the nut holder, a second tightening shaft rotatably mounted on the third mounting bracket and parallel to the first tightening shaft, a third driving device mounted on the third mounting bracket and having a rotation shaft connected to one end of the second tightening shaft, and a second sleeve mounted on the other end of the second tightening shaft.

Preferably or optionally, the first mounting frame includes a bottom plate, a side plate, two first bearing seats and a mounting seat, the connecting device is installed on the middle portion of one side surface of the bottom plate, the side plate, the first bearing seats, the mounting seat and the strip-shaped guide portion are installed on the other side surface of the bottom plate, two ends of the screw rod are respectively installed on the two first bearing seats, the first driving device is installed on the side plate, and the second mounting frame is installed on the mounting seat.

Preferably or optionally, the second mounting bracket comprises a first mounting plate, a second mounting plate and a second bearing seat, the first mounting plate is fixedly connected to the mounting seat, the second bearing seat is fixedly connected to the first mounting plate so as to rotatably mount the first tightening shaft, and the second mounting plate is fixedly connected to the first mounting plate so as to mount the second driving device.

Preferably or alternatively, the third mounting frame comprises a third mounting plate, a fourth mounting plate and a third bearing seat, the third mounting plate is fixedly connected to the nut seat, the third bearing seat is fixedly connected to the third mounting plate to rotatably mount the second tightening shaft, and the fourth mounting plate is fixedly connected to the third mounting plate to mount the third driving device.

Preferably or optionally, the first driving device comprises a servo motor and a speed reducer, the speed reducer is mounted on the side plate, and the servo motor is mounted on the speed reducer and is in transmission connection with the speed reducer.

Preferably or optionally, the strip-shaped guide part comprises a first guide rail and a second guide rail, and the first guide rail and the second guide rail are respectively arranged on two sides of the screw rod.

Preferably or optionally, the device further comprises a coupler, and a rotating shaft of the speed reducer is connected with one end of the lead screw through the coupler.

Preferably or alternatively, the mounting is located adjacent one end of the rail.

The utility model aims at still providing a bolt tightening robot, including robot and foretell bolt tightening mechanism, bolt tightening mechanism passes through connecting device and installs on robot's arm.

The utility model discloses a bolt tightening mechanism and robot, the advantage that has for prior art is: the exhaust manifold nut is screwed down simultaneously by the double shafts, so that the problem of nut torque attenuation is effectively solved. Because the exhaust manifold bolt is automatically screwed up under the control of the controller, the bolt is screwed up more reasonably and accurately, the working efficiency is improved, and the manual labor workload is reduced.

Drawings

Fig. 1 is a schematic side view of the bolt tightening mechanism of the present invention.

Fig. 2 is a schematic side view of the first mounting bracket of the bolt tightening mechanism of the present invention.

Fig. 3 is a schematic side view of the first tightening part and the second tightening part of the bolt tightening mechanism of the present invention.

Description of the figures

1. A first mounting bracket; 11. a base plate; 12. a side plate; 13. a first bearing housing; 14. a mounting seat;

2. a first driving device; 21. a servo motor; 22. a speed reducer;

3. a strip-shaped guide part; 31. a first guide rail; 32. a second guide rail;

4. a reciprocating portion; 41. a lead screw; 42. a nut seat;

5. a first tightening part; 51. a second mounting bracket; 511. a first mounting plate; 512. a second mounting plate; 513. a second bearing housing; 52. a first tightening shaft; 53. a second driving device; 54. a first sleeve;

6. a second tightening part; 61. a third mounting bracket; 611. a third mounting plate; 612. a fourth mounting plate; 613. a third bearing seat; 62. a second tightening shaft; 63. a third driving device; 64. a second sleeve;

7. a coupling is provided.

Detailed Description

A bolt tightening mechanism and a robot according to the present invention will be described in further detail with reference to fig. 1 to 3 of the drawings.

The utility model discloses a bolt tightening mechanism please refer to the relevant each picture of fig. 1-3, including first mounting bracket 1, first drive arrangement 2, bar guide portion 3, reciprocating motion portion 4, first portion 5 and the second portion 6 of screwing up.

The first mounting frame 1 is provided with connecting means (not shown in the figures) for connection to the robot. For example, the connecting device comprises a gun changing disc and a valve island device, the first mounting frame 1 is detachably connected with the robot through the gun changing disc, the first driving device 2 is electrically connected with the valve island device, the valve island device is connected with the controller, and the control program of the controller comprises a control program for timely adjusting the relative distance between the second screwing part 6 and the first screwing part 5, so that the accuracy and the automation control are realized.

Of course, the connection mode of the first mounting bracket 1 and the robot is not limited to the connection mode through a gun changing plate, and a person skilled in the art can select other connection modes of the first mounting bracket 1 and the robot according to actual needs.

The first driving device 2 is installed at one end of the first installation frame 1, and the bar-shaped guide part 3 is installed on the first installation frame 1.

The reciprocating unit 4 is driven to convert a rotational motion into a linear motion, the reciprocating unit 4 includes a screw 41 rotatably mounted on the first mounting bracket 1 and a nut seat 42 axially movably mounted on the screw 41, the screw 41 is disposed in parallel with the bar guide 3, one end of the screw 41 is connected to a rotating shaft of the first driving device 2, and the nut seat 42 is slidably connected to the bar guide 3 to straighten the nut seat 42.

The first tightening part 5 includes a second mounting bracket 51, a first tightening shaft 52, a second driving device 53 and a first sleeve 54, the second mounting bracket 51 is fixedly connected to the first mounting bracket 1, the first tightening shaft 52 is rotatably installed on the second mounting bracket 51, and the first tightening shaft 52 is perpendicular to the bar-shaped guide part 3, the second driving device 53 is installed on the second mounting bracket 51 and a rotation shaft of the second driving device 53 is connected to one end of the first tightening shaft 52, and the first sleeve 54 is installed on the other end of the first tightening shaft 52 for tightening the bolt.

The second tightening portion 6 includes a third mounting frame 61, a second tightening shaft 62, a third driving device 63, and a second sleeve 64, the third mounting frame 61 is fixedly coupled to the nut holder 42, the second tightening shaft 62 is rotatably mounted on the third mounting frame 61, the second tightening shaft 62 is parallel to the first tightening shaft 52, the third driving device 63 is mounted on the third mounting frame 61, a rotation shaft of the third driving device 63 is connected to one end of the second tightening shaft 62, and the second sleeve 64 is mounted on the other end of the second tightening shaft 62 for tightening the bolt.

The second driving device 53 and the third driving device 63 are driven by any one of electric, pneumatic, and hydraulic driving methods. For example, when both the second driving device 53 and the third driving device 63 are pneumatic devices, the controller controls the opening and closing of the pneumatic devices by controlling the opening and closing of the electric valves.

The working principle is as follows: the acting arm of the robot is connected with the first mounting frame 1 of the bolt tightening mechanism, the robot drives the bolt tightening mechanism to move to the exhaust manifold, the first sleeve 54 of the first tightening part 5 is vertically opposite to the first bolt of the exhaust manifold, the controller controls the first driving device 2 to be started so as to adjust the position of the second tightening part 6, the second sleeve 64 of the second tightening part 6 is vertically opposite to the second bolt, preferably, the second bolt which forms a diagonal angle with the first bolt, the robot drives the bolt tightening mechanism to move towards the exhaust manifold until the first sleeve 54 is sleeved outside the first bolt, the second sleeve 64 is sleeved outside the second bolt, the controller controls the second driving device 53 and the third driving device 63 to be started simultaneously so as to tighten the first bolt and the second bolt simultaneously, when the double-shaft nuts are tightened, the two nuts are tightened simultaneously, so that the single nut can be prevented from being subjected to reverse tension of the exhaust manifold, thereby effectively solving the problem of nut torque attenuation. Because the exhaust manifold bolt is automatically screwed up under the control of the controller, the bolt is screwed up more reasonably and accurately, the working efficiency is improved, and the manual labor workload is reduced.

When other bolts need to be screwed down, the robot is lifted and the angle is adjusted, so that the first sleeve 54 of the first screwing part 5 is vertically opposite to the third bolt of the exhaust manifold, the controller controls the first driving device 2 to be started so as to adjust the second sleeve 64 to be vertically opposite to the fourth bolt, the robot displaces the bolt screwing mechanism towards the exhaust manifold until the first sleeve 54 is sleeved outside the third bolt, the second sleeve 64 is sleeved outside the fourth bolt, and the controller controls the second driving device 53 and the third driving device 63 to be started simultaneously so as to screw down the third bolt and the fourth bolt simultaneously.

Preferably, the diagonal tightening has the effect of allowing the parts to be secured more evenly, avoiding uneven and jamming.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the first mounting bracket 1 includes a bottom plate 11, a side plate 12, two first bearing seats 13, and a mounting seat 14.

The connecting device is mounted on the middle of one side surface of the bottom plate 11, and the side plate 12, the two first bearing seats 13, the mounting seat 14, and the bar-shaped guide portion 3 are mounted on the other side surface of the bottom plate 11.

The two ends of the lead screw 41 are respectively mounted on the two first bearing seats 13, the first driving device 2 is mounted on the side plate 12, and the second mounting frame 51 is mounted on the mounting seat 14.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the second mounting bracket 51 includes a first mounting plate 511, a second mounting plate 512, and a second bearing housing 513.

The first mounting plate 511 is fixed to the mounting base 14, and the second bearing housing 513 is fixed to the first mounting plate 511 to rotatably mount the first tightening shaft 52.

The second mounting plate 512 is fixedly connected to the first mounting plate 511 for mounting the second driving device 53.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the third mounting bracket 61 includes a third mounting plate 611, a fourth mounting plate 612, and a third bearing housing 613.

The third mounting plate 611 is fixed to the nut holder 42, and the third bearing housing 613 is fixed to the third mounting plate 611 to rotatably mount the second tightening shaft 62.

The fourth mounting plate 612 is fixedly connected with the third mounting plate 611 to mount the third driving device 63.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the first driving device 2 includes a servo motor 21 and a speed reducer 22, the speed reducer 22 is mounted on the side plate 12, and the servo motor 21 is mounted on the speed reducer 22 and is in transmission connection with the speed reducer 22.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the bar guide 3 includes a first guide rail 31 and a second guide rail 32, and the first guide rail 31 and the second guide rail 32 are respectively provided on both sides of the lead screw 41.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the device further comprises a coupler 7, and a rotating shaft of the speed reducer 22 is connected with one end of the lead screw 41 through the coupler 7.

The utility model discloses a bolt tightening mechanism please refer to each relevant picture of fig. 1 to 3, can also be on the basis of preceding technical scheme: the mount 14 is disposed adjacent to one end of the guide rail 31.

The utility model also provides a bolt tightening robot, including robot body and foretell bolt tightening mechanism, bolt tightening mechanism passes through connecting device and installs on robot body's arm.

The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims

1. A bolt tightening mechanism, comprising:

a first mounting frame (1), the first mounting frame (1) being provided with a connecting device for connection with a robot,

a first driving device (2) arranged on the first mounting frame (1),

a strip-shaped guide part (3) arranged on the first mounting rack (1),

a reciprocating part (4) comprising a screw rod (41) rotatably mounted on the first mounting frame (1) and a nut seat (42) axially movably mounted on the screw rod (41), wherein the screw rod (41) and the bar-shaped guide part (3) are arranged in parallel, one end of the screw rod (41) is connected with a rotating shaft of the first driving device (2), and the nut seat (42) is connected with the bar-shaped guide part (3) in a sliding manner,

a first tightening part (5) comprising a second mounting frame (51), a first tightening shaft (52), a second driving device (53) and a first sleeve (54), the second mounting frame (51) being fixedly connected to the first mounting frame (1), the first tightening shaft (52) being rotatably mounted on the second mounting frame (51), and the first tightening shaft (52) being perpendicular to the bar guide (3), the second driving device (53) being mounted on the second mounting frame (51) and a rotation shaft of the second driving device (53) being connected to one end of the first tightening shaft (52), the first sleeve (54) being mounted on the other end of the first tightening shaft (52), and

a second tightening part (6) including a third mounting bracket (61), a second tightening shaft (62), a third driving means (63), and a second sleeve (64), the third mounting bracket (61) being fixedly coupled to the nut holder (42), the second tightening shaft (62) being rotatably mounted on the third mounting bracket (61), and the second tightening shaft (62) being parallel to the first tightening shaft (52), the third driving means (63) being mounted on the third mounting bracket (61) and a rotation shaft of the third driving means (63) being connected to one end of the second tightening shaft (62), and the second sleeve (64) being mounted on the other end of the second tightening shaft (62).

2. The bolt tightening mechanism according to claim 1, characterized in that the first mounting bracket (1) includes a bottom plate (11), a side plate (12), two first bearing seats (13), and a mount base (14), the connecting device is installed on a middle portion of one side surface of the bottom plate (11), the side plate (12), the first bearing seats (13), the mount base (14), and the bar-shaped guide portion (3) are installed on the other side surface of the bottom plate (11), both ends of the lead screw (41) are installed on the two first bearing seats (13), respectively, the first driving device (2) is installed on the side plate (12), and the second mounting bracket (51) is installed on the mount base (14).

3. The bolt tightening mechanism according to claim 2, characterized in that the second mounting bracket (51) comprises a first mounting plate (511), a second mounting plate (512) and a second bearing block (513), the first mounting plate (511) being fixedly connected to the mounting base (14), the second bearing block (513) being fixedly connected to the first mounting plate (511) for rotatably mounting the first tightening shaft (52), the second mounting plate (512) being fixedly connected to the first mounting plate (511) for mounting the second driving device (53).

4. The screw tightening mechanism according to claim 3, characterized in that the third mounting bracket (61) includes a third mounting plate (611), a fourth mounting plate (612), and a third bearing seat (613), the third mounting plate (611) being fixedly connected to the nut seat (42), the third bearing seat (613) being fixedly connected to the third mounting plate (611) for rotatably mounting the second tightening shaft (62), the fourth mounting plate (612) being fixedly connected to the third mounting plate (611) for mounting the third driving device (63).

5. The bolt tightening mechanism according to claim 4, characterized in that the first drive device (2) includes a servomotor (21) and a reducer (22), the reducer (22) being mounted on the side plate (12), the servomotor (21) being mounted on the reducer (22) and being drivingly connected with the reducer (22).

6. The bolt tightening mechanism according to claim 5, characterized in that the bar guide (3) includes a first rail (31) and a second rail (32), the first rail (31) and the second rail (32) being provided on both sides of the lead screw (41), respectively.

7. The bolt tightening mechanism according to claim 6, characterized by further comprising a coupling (7), wherein a rotating shaft of the speed reducer (22) is connected with one end of the lead screw (41) through the coupling (7).

8. A bolt tightening robot comprising a robot body and a bolt tightening mechanism according to any one of claims 1 to 7, wherein one end of an action arm of the robot is detachably connected to a connecting device of the bolt tightening mechanism.