Door assembly and machining equipment

Abstract

The invention provides a door assembly and machining equipment, and the door assembly comprises a door body which is arranged at a preset opening of a to-be-mounted part in a manner of being capable of reciprocating in a preset direction so as to open or close the preset opening; a main body of the driving part is mounted on the to-be-mounted component, and the driving end of the driving part is in driving connection with the door body so as to drive the door body to move; the magnetic track is arranged on the to-be-installed component and located on the lower side of the preset opening, and the magnetic track extends in the preset direction; and the magnetic component is installed at the bottom of the door body and is opposite to the magnetic track, so that mutual repulsive acting force is generated between the magnetic component and the magnetic track, the door body is made to suspend, and the problems that in the prior art, the opening and closing mode of the gate of the numerical control machine tool is low in efficiency, and the door opening and closing time is long are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, and in particular to a door assembly and processing equipment. Background Art

[0002] In the fields of aerospace, shipbuilding, etc., when manufacturing equipment, it is usually necessary to set a series of openings inside the equipment to facilitate the manufacturing workers to manufacture the equipment and install, test and repair the equipment. When necessary, certain openings must be covered to prevent external substances from contaminating internal substances or to protect the equipment.

[0003] Computer Numerical Control Machine Tools (CNC machine tools) are widely used in the field of mechanical processing due to their high precision, automation and production efficiency. The door of a CNC machine tool is an important channel for operators to enter and exit and for material handling. Its opening and closing efficiency directly affects the smoothness of the entire production process and processing efficiency.

[0004] The doors of CNC machine tools in the prior art usually adopt a manual opening and closing method, and the operator needs to manually open or close the door. This method is not only inefficient and takes a long time to open and close the door in frequent operations or emergency situations, but may also cause safety hazards due to improper human operation, such as causing hand injuries to the operator. In addition, the manual opening and closing method has a low degree of automation and cannot work in conjunction with other automated components of the CNC machine tool, resulting in limited production efficiency.

[0005] Symmetrically, some people have proposed the use of automatic opening and closing, that is, using a cylinder to control the movement of the door. However, due to the friction between the door and the main body of the CNC machine tool, the switching efficiency of the automatic opening and closing method is relatively low, and the opening and closing time is also relatively long, which cannot meet the needs of fast opening and closing of the door. Summary of the invention

[0006] The main purpose of the present invention is to provide a door assembly to solve the problem that the opening and closing method of the door of a CNC machine tool in the prior art is low in efficiency and takes a long time to open and close the door.

[0007] In order to achieve the above-mentioned purpose, according to a first aspect of the present invention, a door assembly is provided, comprising: a door body, which is reciprocally movably arranged at a predetermined opening of a component to be installed in a predetermined direction to open or close the predetermined opening; a driving part, the main body of the driving part is installed on the component to be installed, and the driving end of the driving part is connected to the door body to drive the door body to move; a magnetic track, which is arranged on the component to be installed and is located at the lower side of the predetermined opening, and the magnetic track extends in a predetermined direction; a magnetic component, which is installed at the bottom of the door body and is arranged opposite to the magnetic track to generate a mutually repulsive force between the magnetic track and the magnetic track to make the door body suspend.

[0008] Furthermore, the driving part includes a pneumatic cylinder or an electric cylinder.

[0009] Furthermore, the door assembly also includes a limit switch, which is arranged on the part to be installed and corresponds to the door body to limit the maximum stroke of the door body.

[0010] Furthermore, the magnetic track and the magnetic component are both electromagnets.

[0011] Further, the magnetic component includes a rotating wheel, and the rotating wheel is rotatably arranged at the bottom of the door body around a predetermined axis.

[0012] Furthermore, the outer peripheral surface of the rotating wheel includes a first conical surface and a second conical surface set at a first predetermined angle, and the side of the magnetic track close to the magnetic component includes a first inclined surface and a second inclined surface set at a second predetermined angle; wherein the first conical surface is set corresponding to the first inclined surface, and the second conical surface is set corresponding to the second inclined surface.

[0013] Furthermore, there are multiple rotating wheels, and the multiple rotating wheels are arranged at intervals along the extension direction of the magnetic track.

[0014] Furthermore, the door assembly also includes a controller, wherein the controller is electrically connected to the driving part to control the movement or stop of the driving part; the controller is electrically connected to both the magnetic track and the magnetic component to control the magnitude of the force between the magnetic track and the magnetic component to adjust the distance between the magnetic track and the magnetic component.

[0015] Furthermore, there are two door bodies, which can be arranged close to or far away from each other along a predetermined direction; there are two driving parts, which are drive-connected to the two door bodies in a one-to-one correspondence; there are two magnetic tracks, which are arranged in a one-to-one correspondence to the two door bodies; there are two magnetic components, which are arranged in a one-to-one correspondence to the two door bodies and the two magnetic tracks.

[0016] According to a second aspect of the present invention, there is provided a processing device, comprising the above-mentioned door assembly, the processing device also comprising a device body, an operation port is arranged on the device body, and the door assembly is arranged on the device body and located at the operation port.

[0017] Applying the technical solution of the present invention, the door assembly of the present invention includes: a door body, which is reciprocally movably arranged at a predetermined opening of the component to be installed along a predetermined direction to open or close the predetermined opening; a driving part, the main body of the driving part is installed on the component to be installed, and the driving end of the driving part is connected to the door body to drive the door body to move; a magnetic track, which is arranged on the component to be installed and located at the lower side of the predetermined opening, and the magnetic track extends along the predetermined direction; a magnetic component, which is installed at the bottom of the door body and arranged opposite to the magnetic track to generate a mutually repulsive force between the magnetic track and the magnetic track to make the door body suspended. In this way, the door assembly of the present invention drives the movement of the door body by setting a driving part, and suspends the door body by setting a magnetic track and a magnetic component, thereby reducing the direct contact between the door body and the magnetic track during the movement, effectively reducing the sliding friction resistance, and making the movement of the door body smoother and more stable, while reducing noise and improving the comfort of equipment use. It is particularly suitable for processing equipment that requires frequent opening and closing of the door body, which can significantly improve the operating efficiency and reliability of the processing equipment, reduce mechanical wear during the opening and closing of the door body, and extend the service life of the processing equipment. Moreover, due to the reduction of friction, the opening and closing action of the door body is lighter and faster, which solves the problem of low efficiency and long opening and closing time of the door of the CNC machine tool in the prior art, and improves the operating efficiency of the production line with the processing equipment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 shows a front view of an embodiment of a door assembly according to the present invention;

[0020] Figure 2 Shows Figure 1 A cross-sectional view of the door assembly shown along the AA direction;

[0021] Figure 3 Shows Figure 2 A partial enlarged view of position B of the door assembly shown;

[0022] Figure 4 Shows Figure 3 A partial enlarged view of point C of the door assembly is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Door body;

[0025] 2. Driving unit;

[0026] 3. Magnetic track; 31. First cone surface; 32. Second cone surface;

[0027] 4. Magnetic component; 40. Rotating wheel; 41. First inclined surface; 42. Second inclined surface;

[0028] 5. Limit switch. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] like Figures 1 to 4 As shown, the present invention provides a door assembly, including: a door body 1, which is reciprocally movably arranged at a predetermined opening of a component to be installed along a predetermined direction to open or close the predetermined opening; a driving part 2, the main body of the driving part 2 is installed on the component to be installed, and the driving end of the driving part 2 is drivingly connected to the door body 1 to drive the door body 1 to move; a magnetic track 3, the magnetic track 3 is arranged on the component to be installed and is located at the lower side of the predetermined opening, and the magnetic track 3 extends along the predetermined direction; a magnetic component 4, the magnetic component 4 is installed at the bottom of the door body 1 and is arranged opposite to the magnetic track 3 to generate a mutually repulsive force between the magnetic track 3 and the door body 1, so as to make the door body 1 suspended.

[0031] In this way, the door assembly of the present invention drives the door body 1 to move by setting a driving part 2, and suspends the door body 1 by setting a magnetic track 3 and a magnetic component 4, thereby reducing the direct contact between the door body 1 and the magnetic track 3 during the movement, effectively reducing the sliding friction resistance, and making the movement of the door body 1 smoother and more stable. At the same time, the noise is reduced, and the comfort of the equipment is improved. It is particularly suitable for processing equipment that requires frequent opening and closing of the door body, which can significantly improve the operating efficiency and reliability of the processing equipment, reduce mechanical wear during the opening and closing of the door body, and extend the service life of the processing equipment. Moreover, due to the reduction of friction, the opening and closing action of the door body 1 is lighter and faster, which solves the problem of low efficiency and long opening and closing time of the door of the CNC machine tool in the prior art, and improves the operating efficiency of the production line with the processing equipment of the present invention.

[0032] Optionally, the driving part 2 includes a pneumatic cylinder or an electric cylinder.

[0033] The door assembly of the present invention adopts a pneumatic cylinder or an electric cylinder as the driving part 2, which not only provides a stable and strong driving force for the door body 1, but also has the characteristics of fast response speed and high control accuracy, and can realize fast and accurate movement of the door body 1. It is suitable for production environments with a high degree of automation, can reduce production waiting time, and improve production efficiency. At the same time, it can also maintain stable working performance in extreme environments. For example, in high or low temperature environments, the pneumatic cylinder and the electric cylinder can still work normally to ensure the normal opening and closing of the door body 1, which provides a guarantee for the continuous and stable operation of the processing equipment.

[0034] like Figures 1 to 4 As shown, the door assembly further includes a limit switch 5 , which is arranged on the portion to be installed and corresponds to the door body 1 , so as to limit the maximum stroke of the door body 1 .

[0035] The door assembly of the present invention can be linked with the driving unit 2 by setting a limit switch 5. Once the door body reaches the preset open or closed position, the limit switch will immediately send a signal to stop the driving unit 2, thereby avoiding energy waste caused by over-driving, preventing the door body 1 from moving too far, avoiding excessive opening or closing of the door body, protecting the processing equipment from damage, and ensuring the safety of operation, avoiding accidents caused by operational errors.

[0036] Specifically, the magnetic track 3 and the magnetic component 4 are both electromagnets. In this way, the magnitude of the mutually repulsive force between the magnetic track 3 and the magnetic component 4 can be adjusted by the magnitude of the current, thereby achieving precise control of the suspension height of the door body 1. At the same time, it also has the characteristics of rapid start and stop, and can quickly respond to the instructions of the controller to achieve rapid opening and closing of the door body 1. In addition, since the magnetic field strength of the electromagnet can be adjusted by the magnitude of the current, it can adapt to door bodies 1 of different weights. Whether it is a door body 1 made of lightweight materials or a door body 1 made of heavy metal, the electromagnet can provide sufficient mutually repulsive force to ensure the stable suspension of the door body 1.

[0037] It should be noted that when the electromagnet is not energized, the door body 1 can be opened and closed manually.

[0038] like Figures 1 to 4 As shown, the magnetic component 4 includes a rotating wheel 40, which is rotatably arranged around a predetermined axis at the bottom of the door body 1. In this way, when the electromagnet is powered off, the resistance during the movement of the door body 1 can be reduced by rotating the rotating wheel 40, thereby ensuring the smooth movement of the door body 1.

[0039] like Figure 3 and Figure 4As shown, the outer peripheral surface of the rotating wheel 40 includes a first conical surface 31 and a second conical surface 32 set at a first predetermined angle, and the side of the magnetic track 3 close to the magnetic component 4 includes a first inclined surface 41 and a second inclined surface 42 set at a second predetermined angle; wherein the first conical surface 31 is set corresponding to the first inclined surface 41, and the second conical surface 32 is set corresponding to the second inclined surface 42.

[0040] The magnetic track 3 and the magnetic component 4 in the door assembly of the present invention can ensure that the door body 1 always maintains a stable suspension state during the movement process through the coordination of the first cone surface 31 and the first inclined surface 41 as well as the second cone surface 32 and the second inclined surface 42, and can guide the movement of the door body 1, and can avoid accidental contact between the door body 1 and the magnetic track 3, further improving the operating safety and efficiency of the equipment. In high-precision processing equipment, this setting can reduce the processing error caused by the vibration of the door body 1, improve the processing accuracy, and even in the case of the weight of the door body or the vibration of the equipment, it can ensure that the magnetic track 3 and the magnetic component 4 will not separate from each other while maintaining a safe distance between the door body 1 and the magnetic track 3, ensuring the stable movement of the door body 1 and improving the reliability of the processing equipment.

[0041] Specifically, the first predetermined angle and the second predetermined angle are both acute angles.

[0042] Optionally, the first predetermined angle and the second predetermined angle may be equal or unequal.

[0043] like Figure 1 As shown, there are multiple rotating wheels 40, which are spaced apart along the extension direction of the magnetic track 3, so as to balance the force of the door body 1 during movement, ensure the smooth movement of the door body 1, and increase the bearing capacity of the door body 1, which is suitable for the suspended movement of large door bodies 1. In the door assembly of large industrial equipment, this design can ensure the stability and safety of the door body during opening and closing.

[0044] In an embodiment of the present invention not shown in the figure, the door assembly also includes a controller, wherein the controller is electrically connected to the driving part 2 to control the movement or stop of the driving part 2; the controller is electrically connected to both the magnetic track 3 and the magnetic component 4 to control the magnitude of the force between the magnetic track 3 and the magnetic component 4 to adjust the distance between the magnetic track 3 and the magnetic component 4.

[0045] Furthermore, the controller is electrically connected to the limit switch 5 to determine whether to control the driving part 2 to stop according to the detection signal of the limit switch 5 .

[0046] The door assembly of the present invention realizes intelligent control of the movement and suspension state of the door body 1 by setting a controller, and can flexibly adjust the movement speed and suspension height of the door body 1 according to actual needs, thereby improving the intelligence level and operation convenience of the processing equipment. In the equipment door assembly of the smart factory, this design can realize remote control and improve the efficiency and flexibility of production management. In addition, the controller can automatically adjust the suspension height of the door body according to the working state of the equipment. For example, when the processing equipment is running, the suspension height of the door body can be appropriately increased to reduce the impact of vibration of the processing equipment on the door body during operation, thereby improving the processing accuracy.

[0047] In another embodiment of the present invention not shown in the figure, the door assembly does not include a controller, and the general control component of the processing equipment is electrically connected to the driving part 2 to control the movement or stop of the driving part 2; the general control component of the processing equipment is electrically connected to both the magnetic track 3 and the magnetic component 4 to control the magnitude of the force between the magnetic track 3 and the magnetic component 4 to adjust the distance between the magnetic track 3 and the magnetic component 4; the general control component of the processing equipment can also be electrically connected to the limit switch 5 to determine whether to control the driving part 2 to stop according to the detection signal of the limit switch 5.

[0048] like Figure 1 As shown, there are two door bodies 1, and the two door bodies 1 can be arranged close to or far away from each other along a predetermined direction; there are two driving parts 2, and the two driving parts 2 are drivingly connected to the two door bodies 1 in a one-to-one correspondence; there are two magnetic tracks 3, and the two magnetic tracks 3 are arranged in a one-to-one correspondence with the two door bodies 1; there are two magnetic components 4, and the two magnetic components 4 are arranged in a one-to-one correspondence with the two door bodies 1 and the two magnetic tracks 3.

[0049] In this way, it is suitable for processing equipment that requires a larger opening, such as large CNC machine tools. It not only provides sufficient operating space to facilitate operators to load and unload large workpieces, but also ensures the independence and stability of the movement of each door body 1 through an independent drive unit 2, magnetic track 3 and magnetic component 4. Even if a single door body 1 fails, the other door body 1 can still work normally, thereby improving the use efficiency and safety of the processing equipment.

[0050] Specifically, there are two limit switches 5 , and the two limit switches 5 are arranged in a one-to-one correspondence with the two door bodies 1 .

[0051] The present invention also provides a processing equipment, including the above-mentioned door assembly, the processing equipment also includes an equipment body, the equipment body is provided with an operation port, and the door assembly is provided on the equipment body and is located at the operation port (the equipment body is the above-mentioned component to be installed, and the operation port is the predetermined opening of the component to be installed). By providing the above-mentioned door assembly, the processing equipment of the present invention can not only improve the efficiency and stability of opening and closing the door, reduce the maintenance cost of the processing equipment, improve the automation level of the processing equipment, and improve production efficiency, but also improve the operating convenience and user experience of the processing equipment, reduce the physical labor of the operator, and at the same time, due to the reduction of mechanical wear, it can also reduce the maintenance cost of the processing equipment and improve the operating reliability and service life of the processing equipment.

[0052] Specifically, the processing equipment of the present invention may be a CNC machine tool.

[0053] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0054] The door assembly of the present invention includes: a door body 1, which is reciprocally movably arranged at a predetermined opening of a component to be installed along a predetermined direction to open or close the predetermined opening; a driving part 2, the main body of the driving part 2 is installed on the component to be installed, and the driving end of the driving part 2 is drivingly connected to the door body 1 to drive the door body 1 to move; a magnetic track 3, which is arranged on the component to be installed and is located at the lower side of the predetermined opening, and the magnetic track 3 extends along the predetermined direction; a magnetic component 4, which is installed at the bottom of the door body 1 and is arranged opposite to the magnetic track 3 to generate a mutually repulsive force between the magnetic track 3 and the door body 1, so as to make the door body 1 suspended. In this way, the door assembly of the present invention drives the door body 1 to move by setting a driving part 2, and suspends the door body 1 by setting a magnetic track 3 and a magnetic component 4, thereby reducing the direct contact between the door body 1 and the magnetic track 3 during the movement, effectively reducing the sliding friction resistance, and making the movement of the door body 1 smoother and more stable. At the same time, the noise is reduced, and the comfort of the equipment is improved. It is particularly suitable for processing equipment that requires frequent opening and closing of the door body, which can significantly improve the operating efficiency and reliability of the processing equipment, reduce mechanical wear during the opening and closing of the door body, and extend the service life of the processing equipment. Moreover, due to the reduction of friction, the opening and closing action of the door body 1 is lighter and faster, which solves the problem of low efficiency and long opening and closing time of the door of the CNC machine tool in the prior art, and improves the operating efficiency of the production line with the processing equipment of the present invention.

[0055] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0056] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0057] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0058] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 332 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0059] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A door assembly, characterized in that: include: A door body (1), the door body (1) being arranged at a predetermined opening of a component to be installed so as to be reciprocatingly movable along a predetermined direction to open or close the predetermined opening; A driving part (2), wherein the main body of the driving part (2) is mounted on the component to be mounted, and the driving end of the driving part (2) is drivingly connected to the door body (1) to drive the door body (1) to move; A magnetic track (3), the magnetic track (3) being arranged on the component to be mounted and being located at the lower side of the predetermined opening, the magnetic track (3) extending along the predetermined direction; A magnetic component (4) is installed at the bottom of the door body (1) and is arranged opposite to the magnetic track (3) so as to generate a mutually repulsive force between the magnetic track (3) and the door body (1), so as to suspend the door body (1).

2. The door assembly according to claim 1, characterized in that The driving part (2) comprises a pneumatic cylinder or an electric cylinder.

3. The door assembly according to claim 1, characterized in that The door assembly further comprises a limit switch (5), which is arranged on the portion to be installed and corresponds to the door body (1) so as to limit the maximum stroke of the door body (1).

4. The door assembly according to claim 1, characterized in that The magnetic track (3) and the magnetic component (4) are both electromagnets.

5. The door assembly according to claim 1, characterized in that The magnetic component (4) comprises a rotating wheel (40), and the rotating wheel (40) is rotatably arranged around a predetermined axis at the bottom of the door body (1).

6. The door assembly according to claim 5, characterized in that The outer peripheral surface of the rotating wheel (40) includes a first conical surface (31) and a second conical surface (32) which are arranged at a first predetermined angle, and the side of the magnetic track (3) close to the magnetic component (4) includes a first inclined surface (41) and a second inclined surface (42) which are arranged at a second predetermined angle; wherein the first conical surface (31) is arranged correspondingly to the first inclined surface (41), and the second conical surface (32) is arranged correspondingly to the second inclined surface (42).

7. The door assembly according to claim 5, characterized in that There are a plurality of rotating wheels (40), and the plurality of rotating wheels (40) are arranged at intervals along the extension direction of the magnetic track (3).

8. The door assembly according to claim 5, characterized in that The door assembly further comprises a controller, wherein the controller is electrically connected to the driving part (2) to control the driving part (2) to move or stop; the controller is electrically connected to both the magnetic track (3) and the magnetic component (4) to control the magnitude of the force between the magnetic track (3) and the magnetic component (4) to adjust the distance between the magnetic track (3) and the magnetic component (4).

9. The door assembly according to any one of claims 1 to 8, characterized in that: The number of the door bodies (1) is two, and the two door bodies (1) can be arranged close to or far away from each other along the predetermined direction; The number of the driving parts (2) is two, and the two driving parts (2) are drivingly connected to the two door bodies (1) in a one-to-one correspondence; The number of the magnetic tracks (3) is two, and the two magnetic tracks (3) are arranged in one-to-one correspondence with the two door bodies (1); The number of the magnetic components (4) is two, and the two magnetic components (4) are arranged in a one-to-one correspondence with the two door bodies (1) and the two magnetic tracks (3).

10. A processing equipment, characterized in that: The processing equipment comprises the door assembly according to any one of claims 1 to 9, wherein the processing equipment further comprises an equipment body, an operating port is provided on the equipment body, and the door assembly is provided on the equipment body and located at the operating port.

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