Mechanical photoelectric sensor

Abstract

The utility model relates to the technical field of sensors, in particular to a mechanical photoelectric sensor which comprises a fixedly arranged base and a swing plate which is arranged on the base and swings through a pin shaft, one side of the swing plate is fixedly connected with a supporting plate in an upward inclined mode, and the upper portion of the supporting plate penetrates through a gap between two rollers and is fixedly connected with a pressing block. The top surface of the pressing block is positioned above the roller; a tension spring is further fixedly arranged on the base, the proximity switch is in signal connection with the control unit and located on one side of a downward swinging track line of the proximity plate, the tension spring is located above the swinging plate, and one end of the tension spring is fixedly connected with the swinging plate. Compared with an existing photoelectric sensor, the precision is higher, and empty grabbing of the mechanical arm is effectively prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, in particular to a mechanical photoelectric sensor. Background Art

[0002] Photoelectric sensors are sensors that use photoelectric devices as conversion elements. They can be used to detect non-electrical physical quantities that directly cause changes in light quantity, such as light intensity, illuminance, radiation temperature measurement, gas composition analysis, etc.; they can also be used to detect other non-electrical quantities that can be converted into changes in light quantity, such as part diameter, surface roughness, strain, displacement, vibration, speed, acceleration, as well as object shape, working state recognition, etc. Photoelectric sensors have the characteristics of non-contact, fast response, and reliable performance, so they are widely used in industrial automation devices and robots.

[0003] When transporting materials, photoelectric sensors are often needed to sense the materials and then transmit the signals to the control unit, which controls the robotic arm to grab the materials.

[0004] Among them, ordinary photoelectric sensors cannot sense normally in dusty environments, which sometimes causes the robot arm to grab empty objects. Utility Model Content

[0005] The utility model provides a mechanical photoelectric sensor to solve the defects in the prior art.

[0006] The utility model is realized through the following technical solutions:

[0007] A mechanical photoelectric sensor comprises a base, a swinging plate arranged on the base and swinging through a pin shaft, and a proximity switch fixedly arranged on one side of the base, one side of the swinging plate is fixedly connected to a support plate inclined upward, the bottom surface of the support plate is fixedly connected to a proximity plate downward, the upper part of the support plate passes through the gap between two rollers and is fixedly connected to a pressure block, and the top surface of the pressure block is located above the roller; a tension spring is also fixedly arranged on the base, the proximity switch is connected to a control unit signal, the proximity switch is located on one side of the trajectory line of the downward swinging of the proximity plate, and the tension spring is located above the swinging plate and one end is fixedly connected to the swinging plate.

[0008] When the present application is in use, the device is placed inside the grabbing position, the support plate passes through the gap between the two conveying rollers and the pressure block is exposed at the upper end of the roller, when the material moves on the roller and passes over the pressure block, the pressure block will be pressed downward, so that the pressure block and the support plate swing under the action of pressure, and then swing downward along its pin axis under the limitation of the swing plate, the downward swinging of the support plate drives the approach plate to swing downward and stretch the tension spring, and the approach plate is close to the proximity switch when it swings downward, so that the proximity switch receives the signal and transmits it to the control unit, and then drives the robot arm to move, so as to realize the grabbing of the material, and after the material is grabbed, the swing plate swings upward and away from the proximity switch under the action of the tension spring, the robot returns to the initial position and the pressure block moves to its original position again.

[0009] Preferably, the swing plate includes a connecting plate fixedly connected to the supporting plate and side plates vertically connected to both sides of the connecting plate. The side plate and the connecting plate form a U-shaped structure and the vertical plate is located between the two side plates. The vertical plate and the side plate are rotatably connected by a pin shaft.

[0010] Preferably, the swing plate includes a connecting plate fixedly connected to the supporting plate and side plates vertically connected to both sides of the connecting plate. The side plate and the connecting plate form a U-shaped structure and the vertical plate is located between the two side plates. The vertical plate and the side plate are rotatably connected by a pin shaft.

[0011] Preferably, a lifting lug is fixedly connected to the support plate, and the other end of the tension spring is hung on the lifting lug. The lifting lug can facilitate the removal of the tension spring from the lifting lug, so as to facilitate the replacement of the tension spring.

[0012] Preferably, the two sides of the vertical plate are vertically connected with fixed plates, the fixed plates are threadedly connected with upper blocking screws, the upper blocking screws are located on the upward moving trajectory of the swing plate, the vertical plate is vertically connected with a horizontal plate parallel to the bottom plate, the horizontal plate is threadedly connected with lower blocking screws, the lower blocking screws are located on the downward moving trajectory of the swing plate. The upper blocking screws can limit the upward moving distance of the swing plate, and the lower blocking screws can limit the downward moving distance of the swing plate, thereby limiting the swing angle of the swing plate within a certain range.

[0013] Preferably, the upper part of the support plate is bent upward and forms an obtuse angle with the lower part of the support plate, the pressing block is a cylindrical structure and the axis of the pressing block is parallel to the axis of the roller. The upper part of the support plate is bent upward to ensure that the total length of the support plate is reduced while meeting the downward moving distance of the pressing block, and the pressing block is a cylinder to ensure that the material can pass over the pressing block better.

[0014] The beneficial effects of the utility model are as follows: when the material passes through the pressing block, the pressing block can be pressed down to drive the proximity plate to swing downward, and then approach the proximity switch, so that the proximity switch receives the signal and transmits it to the control unit, thereby driving the robot arm to move, thereby grabbing the material. After the material is grabbed, the swing plate swings upward and away from the proximity switch under the action of the tension spring, the robot returns to the initial position and the pressing block moves to the original position again. Compared with the existing photoelectric sensor, it has higher accuracy and effectively prevents the robot from grabbing empty objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] As shown in the figure:

[0018] 1. Bottom plate, 2. Vertical plate, 3. Swing plate, 4. Support plate, 5. Pressure block, 6. Proximity switch, 7. Tension spring, 8. Lifting ear, 9. Upper blocking screw, 10. Proximity plate, 31. Side plate, 32. Connecting plate. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] A mechanical photoelectric sensor, such as Figure 1 The invention comprises a fixed base and a proximity switch arranged at one side of the base.

[0021] The base includes a fixed bottom plate 1 and a vertical plate 2 vertically connected to the bottom plate 1, a swing plate 3 is rotatably connected to the vertical plate 2, a horizontal plate parallel to the bottom plate 1 is vertically connected to the vertical plate 2, a through hole is opened on the upper part of the vertical plate 2, one end of the tension spring 7 is hung in the through hole and the other end is fixedly connected to the swing plate 3.

[0022] The swing plate 3 includes a connecting plate 32 and side plates 31 vertically connected to both sides of the connecting plate 32. The side plates 31 and the connecting plate 32 form a U-shaped structure, and the vertical plate 2 is located between the two side plates 31 and is rotatably connected to the side plates 31 through a pin shaft.

[0023] A support plate 4 is fixedly connected obliquely upward, and a pressure block 5 is fixedly connected to the upper part of the support plate 4 through the gap between the two rollers. The top surface of the pressure block 5 is located above the roller. The proximity switch 6 is located on the trajectory line of the downward swing of the swing plate 3. The tension spring 7 is located above the swing plate 3 and one end is fixedly connected to the swing plate 3.

[0024] The bottom surface of the support plate 4 is fixedly connected downward with an approach plate 10 , and the proximity switch is located on one side of the trajectory line of the approach plate 10 swinging downward.

[0025] When the present application is in use, the device is placed inside the grabbing position, the support plate 4 passes through the gap between the two conveying rollers and the pressure block 5 is exposed at the upper end of the roller. When the material moves on the roller and passes over the pressure block 5, the pressure block 5 will be pressed down, so that the pressure block 5 and the support plate 4 rotate along the axial line of the pin shaft under the action of pressure, and then swing downward along the direction defined by the swing plate 3 and along the pin shaft. When the support plate 4 swings downward, the tension spring 7 is stretched and drives the approach plate 10 to swing downward. When the approach plate 10 swings downward, it approaches the proximity switch 6, so that the proximity switch 6 receives the signal and transmits it to the control unit, thereby driving the robot arm to move and realize the grabbing of the material. After the material is grabbed, the swing plate 3 swings upward and away from the proximity switch 6 under the action of the tension spring 7, the robot returns to the initial position and the pressure block 5 moves to its original position again.

[0026] A lifting lug 8 is fixedly connected to the support plate 4, and the other end of the tension spring 7 is hung on the lifting lug 8. The lifting lug 8 can facilitate the removal of the tension spring 7 from the lifting lug 8, so as to facilitate the replacement of the tension spring 7.

[0027] The two sides of the vertical plate 2 are vertically connected with fixed plates, and the fixed plates are threadedly connected with upper blocking screws 9, and the upper blocking screws 9 are located on the upward moving trajectory of the swing plate 3. The horizontal plate is threadedly connected with lower blocking screws, and the lower blocking screws are located on the downward moving trajectory of the swing plate. The upper blocking screws 9 can limit the upward moving distance of the swing plate 3, and the lower blocking screws can limit the downward moving distance of the swing plate, thereby limiting the swing angle of the swing plate 3 within a certain range. The upper blocking screws 9 and the lower blocking screws are threadedly connected to the corresponding fixed plates and horizontal plates, and can rotate along the corresponding fixed plates and horizontal plates, thereby adjusting the corresponding upper blocking screws and lower blocking screws. The penetration length, thereby changing the limited rotation angle of the swing plate.

[0028] The upper part of the support plate 4 is bent upward and forms an obtuse angle with the lower part of the support plate 4. The pressing block 5 is a cylindrical structure and the axis of the pressing block 5 is parallel to the axis of the roller. The upper part of the support plate 4 is bent upward to ensure that the total length of the support plate 4 is reduced while meeting the downward moving distance of the pressing block 5. The pressing block 5 is a cylinder to ensure that the material can pass over the pressing block 5 better.

[0029] In the use of the present application, when the material passes through the pressing block 5, the pressing block 5 can be pressed down to drive the proximity plate 10 to swing downward, and then approach the proximity switch 6, so that the proximity switch 6 receives the signal and transmits it to the control unit, thereby driving the robot arm to move and realize the grabbing of the material. After the material is grabbed, the swing plate 3 swings upward and away from the proximity switch 6 under the action of the tension spring 7, the robot returns to the initial position and the pressing block 5 moves to the original position again. Compared with the existing photoelectric sensor, it has higher accuracy and effectively prevents the robot from grabbing empty.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A mechanical photoelectric sensor, characterized in that: It includes a base, a swinging plate arranged on the base and swinging through a pin shaft, and a proximity switch fixedly arranged on one side of the base, one side of the swinging plate is fixedly connected to a support plate inclined upward, the bottom surface of the support plate is fixedly connected to a proximity plate downward, the upper part of the support plate passes through the gap between the two rollers and is fixedly connected to a pressure block, and the top surface of the pressure block is located above the roller; a tension spring is also fixedly arranged on the base, the proximity switch is connected to the control unit signal, the proximity switch is located on one side of the trajectory line of the downward swinging of the proximity plate, and the tension spring is located above the swinging plate and one end is fixedly connected to the swinging plate.

2. The mechanical photoelectric sensor according to claim 1, characterized in that: The base includes a bottom plate and a vertical plate vertically connected to the bottom plate, the swing plate is rotatably connected to the vertical plate, a through hole is opened on the upper part of the vertical plate, one end of the tension spring is hung in the through hole and the other end is fixedly connected to the swing plate.

3. The mechanical photoelectric sensor according to claim 2, characterized in that: The swing plate includes a connecting plate fixedly connected to the supporting plate and side plates vertically connected to both sides of the connecting plate. The side plates and the connecting plate form a U-shaped structure, and the vertical plate is located between the two side plates. The vertical plate and the side plates are rotatably connected through a pin shaft.

4. The mechanical photoelectric sensor according to claim 3, characterized in that: A lifting lug is fixedly connected to the support plate, and the other end of the tension spring is hung on the lifting lug.

5. The mechanical photoelectric sensor according to claim 1, characterized in that: The two sides of the vertical plate are vertically connected with fixed plates, and the fixed plates are threadedly connected with upper blocking screws, which are located on the upward moving trajectory of the swinging plate. The vertical plate is vertically connected with a horizontal plate parallel to the bottom plate, and the horizontal plate is threadedly connected with lower blocking screws, which are located on the downward moving trajectory of the swinging plate.

6. The mechanical photoelectric sensor according to claim 1, characterized in that: The upper part of the support plate is bent upward and forms an obtuse angle with the lower part of the support plate. The pressing block is a cylinder-mounted structure and the axis center line of the pressing block is parallel to the axis center line of the roller.

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