CN110842533A - Screw tightening shaft screw sleeving detection device - Google Patents

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

A kind of tightening shaft screw sleeve detection device

technical field

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

Background technique

Screw fastening is the most important fastening method in the assembly industry, and it is the most widely used part connection method in the industry. Fully automatic tightening machines are currently widely used in screw tightening processes to realize automatic screw-in operation of screws. The working principle of the tightening machine is that several tightening shafts are installed on a fixed platform, and each tightening shaft can screw in or unscrew a screw, so a tightening machine can screw in or unscrew several screws at the same time. operate. The tightening shaft is generally composed of a servo motor and a reducer (power source), a torque sensor (to detect the screw-in torque and screw-in angle), a connector and a front-end sleeve (with a spring inside and a certain telescopic length). During the screwing operation of the screwing shaft, the torque sensor detects the screwing angle, torque and the servo motor to form a closed-loop control.

The existing automatic tightening machine needs to manually check whether the front end sleeve of the tightening shaft is aligned with the screw before the automatic screw tightening operation.

SUMMARY OF THE INVENTION

Based on the deficiencies in the prior art mentioned in the above background art, the present invention provides a detection device for the insertion of a tightening shaft screw.

The present invention overcomes the above technical problems by adopting the following technical solutions, specifically:

A tightening shaft screw insertion detection device, comprising a sleeve assembly, a tightening shaft assembly connected to the sleeve assembly, a photoelectric sensor and an induction disc mounted on the sleeve assembly, the sleeve assembly including a tightening shaft assembly fixed with The third sleeve, the second sleeve elastically connected with the third sleeve, and the first sleeve fixedly connected with the second sleeve for matching with the screw, wherein the inside of the third sleeve is provided with a connection with the first sleeve. The upper part of the two sleeves is fitted into a cavity, a spring is installed 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 to the top of the second sleeve; the lower part of the tightening shaft assembly is fixedly connected There is a photoelectric sensor, and an inductive disc connected with the signal of the photoelectric sensor is fixedly connected above the outer wall of the first sleeve.

As a further solution of the present invention, the cavity is a rectangular parallelepiped cavity, and the outer wall of the second sleeve is a rectangular parallelepiped shape adapted to the cavity.

As a further solution of the present invention, the inner wall of the cavity is provided with a strip-shaped through groove, and the outer wall of the second sleeve is provided with a protrusion matching the strip-shaped through groove of the cavity inner wall.

As a further solution of the present invention: the photoelectric sensor is fixed on the lower part of the tightening shaft assembly through the sensor connecting piece, wherein the photoelectric sensor is fixedly installed on the lower part of the sensor connecting piece, and the upper end of the sensor connecting piece has an arc and is fixed on the tightening shaft assembly the lower part.

As a further solution of the present invention: the induction disc is a two-half structure, and a circular hole is opened in the center of the induction disc.

As a further solution of the present invention, a pin hole for fixing the first sleeve is provided in the circumferential direction of the edge of the induction disc.

As a further solution of the present invention: the tightening shaft assembly comprises a No. 1 tightening shaft fixedly connected with the third sleeve, a No. 2 tightening shaft fixedly connected with the No. 1 tightening shaft, and a No. 2 tightening shaft fixedly connected with the No. 2 tightening shaft No. 3 tightening shaft.

After adopting the above structure, compared with the prior art, the present invention has the following advantages: the device achieves elasticity in the axial direction while accurately transmitting torque by means of the second sleeve and the third sleeve that are nested with each other. When the barrel is not matched with the screw, the axial distance between the second sleeve and the third sleeve changes, thereby allowing the distance between the induction disc and the photoelectric sensor to change, and the photoelectric sensor and the induction disc are used to monitor the two in real time. The value of the distance between them, so as to indirectly judge whether the first sleeve is effectively fitted with the screw, and finally control the stop of the tightening shaft.

Description of drawings

FIG. 1 is a schematic diagram of the structure of the tightening shaft screw sleeved into the detection device.

FIG. 2 is a schematic diagram of the structure of the sensor connector and the photoelectric sensor in the detection device by tightening the shaft screw.

FIG. 3 is a schematic diagram of the structure of tightening the shaft screw into the sensing disc in the detection device.

In the figure: 1- the first sleeve, 2- the second sleeve, 3- the third sleeve; 4- No. 1 tightening shaft, 5- No. 2 tightening shaft, 6- No. 3 tightening shaft, 7- Sensor connector , 8-photoelectric sensor, 9-sensing disc, 10-pin hole.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the related drawings. The preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

Example 1

Referring to FIGS. 1 to 3 , in an embodiment of the present invention, a tightening shaft screw insertion detection device includes a sleeve assembly, a tightening shaft assembly connected to the sleeve assembly, a photoelectric sensor 8 installed on the sleeve assembly, and a sensing circle plate 9;

In detail, the sleeve assembly includes a third sleeve 3 fixed with the tightening shaft assembly, a second sleeve 2 elastically connected with the third sleeve 3, and fixedly connected with the second sleeve 2 for connecting with the second sleeve 2. The first sleeve 1 matched with the screw, wherein the third sleeve 3 is provided with a cavity that fits with the upper part of the second sleeve 2, a spring is installed in the cavity, and the upper end of the spring is fixed on the top of the cavity. On the wall, the lower end of the spring is fixedly connected to the top of the second sleeve 2 , and the elastic connection between the second sleeve 2 and the third sleeve 3 is achieved through the restraint of the spring and the cavity.

In order to ensure that the second sleeve 2 and the third sleeve 3 rotate synchronously and can transmit torque without slipping, the cavity is a cuboid cavity. Correspondingly, the outer wall of the second sleeve 2 is adapted to the cavity. Cuboid shape, obviously, the technical solution that can realize the synchronous rotation of the two is not limited to the above technical features. For example, the inner wall of the cavity is provided with a strip-shaped through groove, and the outer wall of the second sleeve 2 is provided with The protrusions that match the strip-shaped through grooves on the inner wall of the cavity can also achieve precise torque transmission through the matching of the protrusions and the strip-shaped through grooves.

Further, a photoelectric sensor 8 is fixedly connected to the lower part of the tightening shaft assembly, and a sensing disc 9 that is signally connected to the photoelectric sensor 8 is fixedly connected above the outer wall of the first sleeve 1. When the first sleeve 1 is completely connected to the screw, When matching, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2, the first sleeve 1 and the screw to extend into the screw hole while rotating, that is, screw into the screw hole, there is no resistance, this When the distance between the second sleeve 2 and the third sleeve 3 is kept within a reasonable range, the photoelectric sensor 8 will not be triggered. On the contrary, when the first sleeve 1 is not in contact with the slot or cross on the screw When matching, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2, and the first sleeve 1 to rotate, but the screws do not rotate, that is, they are not screwed into the screw holes. The tightening shaft assembly close to the screw hole can only drive the second sleeve 2 and the first sleeve 1 to rotate, but cannot extend into the screw hole, the spring is compressed, and the second sleeve 2 is further seated into the third sleeve 3, The distance between the photoelectric sensor 8 and the induction disc 9 becomes smaller until the photoelectric sensor 8 is triggered, thereby stopping the tightening shaft assembly, realizing the function of automatic detection and judgment and control of the stoppage.

Example 2

In order to further explain the above-mentioned tightening shaft screw insertion detection device, the present application provides another embodiment, a tightening shaft screw insertion detection device, the photoelectric sensor 8 is fixed on the lower part of the tightening shaft assembly through the sensor connector 7, Among them, the photoelectric sensor 8 is fixedly installed at the lower part of the sensor connector 7, the upper end of the sensor connector 7 has an arc and is fixed at the lower part of the tightening shaft assembly, and the induction disc 9 is a two-half structure. A circular hole is opened in the center for fitting and clamping with the first sleeve 1, and a pin hole 10 for fixing with the first sleeve 1 is opened in the circumferential direction of the edge of the induction disc 9. Through the two-half induction disc 9 and the sensor connector 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 tightening shaft assembly and the diameter of the first sleeve 1 .

Still further, the tightening shaft assembly includes a No. 1 tightening shaft 4 fixedly connected with the third sleeve 3, a No. 2 tightening shaft 5 fixedly connected with the No. 1 tightening shaft 4, and a No. 2 tightening shaft 5 fixedly connected. No. 3 tightening axis 6.

According to the specific description of the above embodiment, it is easy to know that the working principle of the present invention is that the elastic connection between the second sleeve 2 and the third sleeve 3 is realized through the restraint of the spring and the cavity, when the first sleeve 1 and the screw When fully matched, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2, the first sleeve 1 and the screw to extend into the screw hole while rotating, that is, screw into the screw hole, there is no resistance, At this time, the distance between the second sleeve 2 and the third sleeve 3 is kept within a reasonable range, and the photoelectric sensor 8 will not be triggered. On the contrary, when the first sleeve 1 is not connected to the slot or cross on the screw When matched, the rotating tightening shaft assembly drives the third sleeve 3, the second sleeve 2 and the first sleeve 1 to rotate, but the screws do not rotate, that is, they are not screwed into the screw holes. The tightening shaft assembly close to the screw hole can only drive the second sleeve 2 and the first sleeve 1 to rotate, but cannot extend into the screw hole, the spring is compressed, and the second sleeve 2 is further seated into the third sleeve 3, The distance between the photoelectric sensor 8 and the induction disc 9 becomes smaller until the photoelectric sensor 8 is triggered, thereby stopping the tightening shaft assembly, realizing the function of automatic detection, judgment and control of the stop. The two-half induction disc 9 is connected to the sensor. The position of the photoelectric sensor 8 and the sensing disc 9 of the component 7 can be flexibly adjusted according to the structure of the tightening shaft assembly and the diameter of the first sleeve 1 .

It should be noted that, in the present application, the second sleeve and the third sleeve are fitted with each other to achieve elasticity in the axial direction while accurately transmitting torque. When the first sleeve is not matched with the screw, the second sleeve and the The axial distance between the third sleeves changes, thereby allowing the distance between the induction disc and the photoelectric sensor to change. The photoelectric sensor and the induction disc are used to monitor the distance between the two in real time, thereby indirectly judging the first set Whether the barrel is effectively fitted with the screw, and finally controlling the stop of the tightening shaft is an innovative point of the application.

The above only describes the best embodiments of the present invention, but should not be construed as limiting the claims. The present invention is not limited to the above embodiments, and the specific structure thereof can be changed. Any changes made within the protection scope of the independent claims of the present invention are all within the protection scope of the present invention.

Claims (7)

1. A tightening shaft screw is inserted into a detection device, comprising a sleeve assembly, a tightening shaft assembly connecting the sleeve assembly, a photoelectric sensor (8) and an induction disc (9) installed on the sleeve assembly, 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 fixedly connected with the second sleeve (2) A first sleeve (1) for matching with a screw, wherein a cavity that fits with the upper part of the second sleeve (2) is provided inside the third sleeve (3), and a spring is installed 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 to the top of the second sleeve (2); A sensing disc (9) which is signally connected with the photoelectric sensor (8) is fixedly connected above the outer wall of the sensor. 2 . The detection device for tightening shaft screw insertion according to claim 1 , wherein the cavity is a rectangular parallelepiped cavity, and the outer wall of the second sleeve ( 2 ) is a rectangular parallelepiped suitable for the cavity. 3 . shape. 3. The device for detecting the insertion of a tightening shaft screw according to claim 1, wherein the inner wall of the cavity is provided with a strip-shaped through groove, and the outer wall of the second sleeve (2) is provided with Protrusions that match the strip-shaped through grooves on the inner wall of the cavity. 4 . The detection device for screw insertion of a tightening shaft according to claim 1 , wherein 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 on the lower part of the sensor connecting piece (7), the upper end of the sensor connecting piece (7) has an arc opening and is fixed on the lower part of the tightening shaft assembly. 5. A kind of detection device for tightening shaft screw insertion according to claim 1, characterized in that, the induction disc (9) is a two-half structure, and a circular hole is opened in the center of the induction disc (9). . 6 . The device for detecting the insertion of a tightening shaft screw according to claim 1 , wherein a pin for fixing with the first sleeve ( 1 ) is provided in the circumferential direction of the edge of the induction disc ( 9 ). 7 . hole (10). 7. A tightening shaft screw insertion detection device according to any one of claims 1-6, wherein the tightening shaft assembly comprises a No. 1 tightening shaft (4) that is fixedly connected to the third sleeve (3). ), the No. 2 tightening shaft (5) fixedly connected with the No. 1 tightening shaft (4), and the No. 3 tightening shaft (6) fixedly connected with the No. 2 tightening shaft (5).

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