CN110842533A

CN110842533A - Screw tightening shaft screw sleeving detection device

Info

Publication number: CN110842533A
Application number: CN201911237486.XA
Authority: CN
Inventors: 刘奎立; 刘思邦; 易靖涵
Original assignee: Hon Hai Precision Industry Co Ltd
Current assignee: Hon Hai Precision Industry Co Ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-02-28

Abstract

The invention discloses a detection device for the screw-tightening shaft bolt sleeving, which comprises a sleeve component, a screw-tightening shaft component connected with the sleeve component, a photoelectric sensor and an induction disc, wherein the photoelectric sensor and the induction disc are installed on the sleeve component; the lower part of the screwing shaft assembly is fixedly connected with a photoelectric sensor, and an induction disc in signal connection with the photoelectric sensor is fixedly connected above the outer wall of the first sleeve.

Description

Screw tightening shaft screw sleeving detection device

Technical Field

The invention relates to a mechanical tool, in particular to a detection device for sleeving a screw of a tightening shaft into a screw.

Background

The screw fastening is the most important fastening method in the assembly industry and is the most widely used part connecting mode in the industry at present. The full-automatic tightening machine is widely used in a screw fastening process at present, and realizes automatic screwing operation of screws. The tightening machine operates on the principle that several tightening shafts are mounted on a fixed platform, each of which performs a screwing-in or unscrewing operation on one screw, so that one tightening machine can perform a screwing-in or unscrewing operation on several screws at the same time. The tightening shaft generally consists of a servo motor, a speed reducer (power source), a torque sensor (for detecting the screwing torque and the screwing angle of a screw), a connecting piece and a front end sleeve (containing a spring inside and having a certain telescopic length). When the tightening shaft is screwed in, a torque sensor detects the screwing angle, the torque and the servo motor to form closed-loop control.

The existing automatic screwing machine needs to manually check whether the front end sleeve of the screwing shaft is aligned with the screw before the automatic screwing operation, otherwise, the situation that the screw is not sleeved in the front end sleeve of the screwing shaft easily occurs, and the screwing operation of the screw fails.

Disclosure of Invention

Based on the above-mentioned shortcomings in the prior art, the invention provides a screw-in detection device for a tightening shaft.

The invention overcomes the technical problems by adopting the following technical scheme, and specifically comprises the following steps:

a detection device for the screw screwing-in detection of a screw screwing-in shaft comprises a sleeve component, a screwing-in shaft component connected with the sleeve component, a photoelectric sensor and an induction disc, wherein the photoelectric sensor and the induction disc are installed on the sleeve component; the lower part of the screwing shaft assembly is fixedly connected with a photoelectric sensor, and an induction disc in signal connection with the photoelectric sensor is fixedly connected above the outer wall of the first sleeve.

As a further scheme of the invention: the cavity is a cuboid cavity, and the outer wall of the second sleeve is cuboid-shaped and matched with the cavity.

As a still further scheme of the invention: a strip-shaped through groove is formed in the inner wall of the cavity, and a protrusion matched with the strip-shaped through groove in the inner wall of the cavity is arranged on the outer wall of the second sleeve.

As a still further scheme of the invention: the photoelectric sensor is fixed on the lower portion of the tightening shaft assembly through a sensor connecting piece, wherein the photoelectric sensor is fixedly installed on the lower portion of the sensor connecting piece, and the upper end of the sensor connecting piece is provided with an arc opening and is fixed on the lower portion of the tightening shaft assembly.

As a still further scheme of the invention: the induction disc is of a two-half structure, and a round hole is formed in the center of the induction disc.

As a still further scheme of the invention: and pin holes for fixing the first sleeve are formed in the peripheral direction of the edge of the induction disc.

As a still further scheme of the invention: the tightening shaft assembly comprises a first tightening shaft fixedly connected with the third sleeve, a second tightening shaft fixedly connected with the first tightening shaft, and a third tightening shaft fixedly connected with the second tightening shaft.

After adopting the structure, compared with the prior art, the invention has the following advantages: the device realizes that the axis direction has elasticity when accurate transmission moment of torsion with the help of the second sleeve and the third sleeve of mutual registrate, make the axis distance between second sleeve and the third sleeve change when first sleeve does not match with the screw, and then the distance between permission response disc and the photoelectric sensor changes, the distance value between the two is responded to disc real-time supervision with the help of the photoelectric sensor cooperation, thereby judge indirectly whether first sleeve is effectively registrated with the screw, the shutdown of the final control tightening shaft.

Drawings

Fig. 1 is a schematic structural view of a screw tightening shaft sleeved in a detection device.

Fig. 2 is a schematic structural diagram of a sensor connector and a photoelectric sensor in the detection device for nesting a screw of a tightening shaft into the detection device.

FIG. 3 is a schematic view of the structure of the sensing disc in the detecting device when the screw of the tightening shaft is sleeved in the screw.

In the figure: 1-a first sleeve, 2-a second sleeve, 3-a third sleeve; 4-a first tightening shaft, 5-a second tightening shaft, 6-a third tightening shaft, 7-a sensor connecting piece, 8-a photoelectric sensor, 9-an induction disc and 10-a pin hole.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Example 1

Referring to fig. 1 to 3, in an embodiment of the present invention, a tightening shaft screw nesting detection apparatus includes a sleeve assembly, a tightening shaft assembly connected to the sleeve assembly, a photoelectric sensor 8 mounted on the sleeve assembly, and an induction disc 9;

in detail, the sleeve assembly comprises a third sleeve 3 fixed with the screwing shaft assembly, a second sleeve 2 elastically connected with the third sleeve 3, and a first sleeve 1 fixedly connected with the second sleeve 2 and used for being matched with a screw, wherein a cavity sleeved with the upper part of the second sleeve 2 is formed in the third sleeve 3, a spring is installed in the cavity, the upper end of the spring is fixed on the top wall of the cavity, the lower end of the spring is fixedly connected with the top of the second sleeve 2, and the elastic connection between the second sleeve 2 and the third sleeve 3 is realized through the constraint of the spring and the cavity.

In order to guarantee that second sleeve 2 and third sleeve 3 rotate in step, can transmit the moment of torsion and do not take place to skid, the cavity is the cuboid cavity, and is corresponding, and the outer wall of second sleeve 2 is the cuboid form with cavity looks adaptation, obviously, can realize that the two synchronous pivoted technical scheme is not restricted to above-mentioned technical characteristics, for example, the banding logical groove has been seted up on the cavity inner wall, and be provided with on the outer wall of second sleeve 2 with the strip of cavity inner wall lead to groove assorted arch, lead to the groove cooperation through arch and strip and also can realize the accurate transmission of moment of torsion.

Further, the lower part of the tightening shaft assembly is fixedly connected with a photoelectric sensor 8, a sensing disc 9 in signal connection with the photoelectric sensor 8 is fixedly connected above the outer wall of the first sleeve 1, when the first sleeve 1 is completely matched with a screw, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2, the first sleeve 1 and the screw to extend into a screw hole while rotating, namely, to be screwed into the screw hole, no resistance exists, at the moment, the distance between the second sleeve 2 and the third sleeve 3 is kept in a reasonable range, the photoelectric sensor 8 cannot be triggered, conversely, when the first sleeve 1 is not matched with a straight port or a cross port on the screw, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2 and the first sleeve 1 to rotate, but the screw does not rotate, namely, is not screwed into the screw hole, at the moment, the tightening shaft assembly close to the screw hole while rotating only can drive the second sleeve 2 and the first sleeve 1 to rotate, and can not stretch into the screw, the spring is compressed, in second sleeve 2 further sat into third sleeve 3, the distance between photoelectric sensor 8 and the response disc 9 diminishes until triggering photoelectric sensor 8 to will tighten the axle subassembly and shut down, realize automated inspection and judge and control the function of shutting down.

Example 2

To further explain the tightening shaft screw nesting detection device described above, the present application provides yet another embodiment, a tightening shaft screw nesting detection device, the photoelectric sensor 8 is fixed to the lower part of the tightening shaft assembly by the sensor connector 7, wherein, the photoelectric sensor 8 is fixedly arranged at the lower part of the sensor connecting piece 7, the upper end of the sensor connecting piece 7 is provided with an arc opening and is fixed at the lower part of the tightening shaft component, the sensing disc 9 is of a two-half structure, a round hole is arranged at the center of the sensing disc 9 for being embedded and clamped with the first sleeve 1, a pin hole 10 for being fixed with the first sleeve 1 is arranged at the edge circumference of the sensing disc 9, the position of the photoelectric sensor 8 and the position of the sensing disc 9 can be flexibly adjusted according to the structure of the tightening shaft assembly and the diameter of the first sleeve 1 through the two half sensing discs 9 and the sensor connecting piece 7.

Still further, the tightening shaft assembly includes a first tightening shaft 4 fixedly connected with the third sleeve 3, a second tightening shaft 5 fixedly connected with the first tightening shaft 4, and a third tightening shaft 6 fixedly connected with the second tightening shaft 5.

From the above detailed description of the embodiments, it is easy to understand that the working principle of the present invention is: the elastic connection between the second sleeve 2 and the third sleeve 3 is realized through the restraint of a spring and a cavity, when the first sleeve 1 is completely matched with a screw, the rotating screwing shaft assembly drives the third sleeve 3, the second sleeve 2, the first sleeve 1 and the screw to rotate and extend into a screw hole at the same time, namely, the screw is screwed into the screw hole, no resistance exists, at the moment, the distance between the second sleeve 2 and the third sleeve 3 is kept in a reasonable range, the photoelectric sensor 8 cannot be triggered, conversely, when the first sleeve 1 is not matched with a straight line or a cross on the screw, the rotating screwing shaft assembly drives the third sleeve 3, the second sleeve 2 and the first sleeve 1 to rotate, the screw is not rotated, namely, the screw is not screwed into the screw hole, at the moment, the screwing shaft assembly which rotates and is close to the screw hole at the same time can only drive the second sleeve 2 and the first sleeve 1 to rotate and cannot extend into the screw hole, the spring is compressed, the second sleeve 2 is further seated in the third sleeve 3, the distance between the photoelectric sensor 8 and the sensing disc 9 is reduced until the photoelectric sensor 8 is triggered, so that the screwing shaft assembly is stopped, the automatic detection judgment and the stop control function are realized, and the two half sensing discs 9 and the sensor connecting piece 7 realize that the positions of the photoelectric sensor 8 and the sensing disc 9 can be flexibly adjusted according to the structure of the screwing shaft assembly and the diameter of the first sleeve 1.

It should be noted that, the axis direction has elasticity while realizing accurate transmission torque through the second sleeve and the third sleeve that overlap each other in this application, make the axis distance between second sleeve and the third sleeve change when first sleeve does not match with the screw, and then allow the distance between response disc and the photoelectric sensor to change, with the help of photoelectric sensor cooperation response disc real-time supervision distance value between the two, thereby judge indirectly whether first sleeve overlaps with the screw is effective, the shut down of final control tightening shaft is the innovation point of this application.

The foregoing is merely illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof is allowed to vary. But all changes which come within the scope of the invention are intended to be embraced therein.

Claims

1. A detection device for screw sleeving of a tightening shaft comprises a sleeve assembly, a tightening shaft assembly connected with the sleeve assembly, a photoelectric sensor (8) and an induction disc (9), wherein the photoelectric sensor (8) and the induction disc (9) are mounted on the sleeve assembly, and the detection device is characterized in that the sleeve assembly comprises a third sleeve (3) fixed with the tightening shaft assembly, a second sleeve (2) elastically connected with the third sleeve (3) and a first sleeve (1) fixedly connected with the second sleeve (2) and used for being matched with a screw, a cavity sleeved with the upper part of the second sleeve (2) is formed in the third sleeve (3), a spring is mounted in the cavity, the upper end of the spring is fixed on the top wall of the cavity, and the lower end of the spring is fixedly connected with the top of the second sleeve (2); the lower part of the screwing shaft assembly is fixedly connected with a photoelectric sensor (8), and an induction disc (9) in signal connection with the photoelectric sensor (8) is fixedly connected above the outer wall of the first sleeve (1).

2. The screw tightening shaft screw nesting detection device according to claim 1, wherein the cavity is a rectangular parallelepiped cavity, and the outer wall of the second sleeve (2) is in a rectangular parallelepiped shape matched with the cavity.

3. The screw tightening shaft screw penetration detection device as claimed in claim 1, wherein a strip-shaped through groove is formed on the inner wall of the cavity, and a protrusion matched with the strip-shaped through groove on the inner wall of the cavity is arranged on the outer wall of the second sleeve (2).

4. The tightening shaft screw telescoping detection device according to claim 1, characterized in that the photoelectric sensor (8) is fixed at the lower part of the tightening shaft assembly through a sensor connector (7), wherein the photoelectric sensor (8) is fixedly installed at the lower part of the sensor connector (7), and the upper end of the sensor connector (7) has an arc and is fixed at the lower part of the tightening shaft assembly.

5. The screw tightening shaft screw penetration detection device as claimed in claim 1, wherein the sensing disc (9) is of a two-half structure, and a circular hole is formed in the center of the sensing disc (9).

6. The screw tightening shaft screw nesting detection device according to claim 1, wherein a pin hole (10) for fixing the first sleeve (1) is formed in the circumferential direction of the edge of the sensing disc (9).

7. The tightening shaft screw nesting detection device according to any one of claims 1 to 6, wherein the tightening shaft assembly comprises a first tightening shaft (4) fixedly connected with the third sleeve (3), a second tightening shaft (5) fixedly connected with the first tightening shaft (4), and a third tightening shaft (6) fixedly connected with the second tightening shaft (5).