A general milling machine guard device

Abstract

The application provides a general milling machine protective cover device and relates to the technical field of milling machine protection equipment. The device comprises a protective cover assembly, a tension spring assembly, a height limiting assembly and a support mounted on a vertical milling head shell. A connecting rod assembly is movably connected between the protective cover assembly and the support. One end of the tension spring assembly is connected with the support, and the other end is connected with the connecting rod assembly, which is used for adjusting the up-and-down position of the protective cover assembly. The height limiting assembly is used for fixing the height position of the protective cover assembly when the workpiece is being processed or not. The application protects the operator through the protective cover assembly at the workpiece processing position between the lower end of the vertical milling head shell of the general milling machine and the workbench of the general milling machine, avoids splashing of cutting fluid from burning the operator or burning the clothes of the operator, effectively protects the personal safety of the operator, and also avoids splashing of the cutting fluid from polluting the on-site working environment and keeps the on-site working environment clean.

Description

Technical Field

[0001] This invention relates to the field of milling machine protective equipment technology, and more specifically, to a common milling machine protective cover device. Background Technology

[0002] A milling machine is a machine tool that uses a milling cutter to process various surfaces of a workpiece. The main motion is usually the rotation of the milling cutter, while the movement of the workpiece and the milling cutter constitutes the feed motion. It can process planes, grooves, various curved surfaces, gears, etc. Simply put, a milling machine is a machine tool that can perform milling, drilling, and boring operations on workpieces. There are various types, including horizontal milling machines, elevating table milling machines, gantry milling machines, bench milling machines, and planar milling machines, which are widely used in mechanical manufacturing.

[0003] The spindle speed and feed rate of conventional milling machines are not very fast. Therefore, no protective measures are usually taken. Since conventional milling machines do not have protective measures for operators during workpiece processing, operators are often scalded or have their clothes burned by splashing cutting fluid. This fails to protect the personal safety of operators and also pollutes the working environment due to splashing cutting fluid. Summary of the Invention

[0004] The present invention aims to solve the problem that existing milling machines do not have protective measures for operators during workpiece processing, which often results in operators being scalded or having their clothing burned by splashing cutting fluid, endangering the personal safety of operators, and also causing the working environment to be polluted by splashing cutting fluid.

[0005] To address the above problems, the present invention provides a common milling machine protective cover device, including a protective cover assembly, a tension spring assembly, a height limiting assembly, and a bracket mounted on the vertical milling head housing; A connecting rod assembly is movably connected between the protective cover assembly and the bracket. One end of the tension spring assembly is connected to the bracket, and the other end is connected to the connecting rod assembly, which is used to adjust the up and down position of the protective cover assembly. The height limiting component is used to fix the height position of the protective cover component when the workpiece is being processed or not processed.

[0006] The present invention provides a protective cover device for a common milling machine, which, compared with the prior art, has the following beneficial effects, but is not limited to: This conventional milling machine protective cover device consists of a bracket mounted on the vertical milling head housing of the conventional milling machine, and a protective cover assembly and a connecting rod assembly. One end of the connecting rod assembly is movably connected to the protective cover assembly, and the other end is movably connected to the bracket. A tension spring assembly is then used, with one end connected to the bracket and the other end connected to the connecting rod assembly. When the operator is machining a workpiece, pulling down the protective cover assembly causes it to move between the protective cover assembly and the bracket via the connecting rod assembly, thus moving the protective cover assembly to an observation position. The support of the connecting rod assembly and the limiting function of the height limiting assembly bring the protective cover assembly to a stop at the observation position, effectively fixing the protective cover assembly to the vertical milling head housing of the conventional milling machine. At the workpiece machining position between the lower end and the worktable of a conventional milling machine, a protective cover assembly protects the operator from scalding or burning their clothing due to splashing cutting fluid, effectively protecting the operator's personal safety. It also prevents cutting fluid splashing from polluting the work environment, keeping it clean. When the operator is not machining a workpiece, pulling the protective cover assembly upwards limits its movement to a height limit assembly, preventing further upward movement. A connecting rod assembly supports the stopped protective cover assembly, and a tension spring assembly keeps it in its stopped position. This conventional milling machine protective cover device is simple in structure, easy to operate, and effectively improves product processing efficiency.

[0007] Furthermore, the linkage assembly includes two parallel linkages arranged vertically and a connector mounted on the protective cover assembly. One end of each linkage is movably connected to the bracket, and the other end is movably connected to the connector.

[0008] Furthermore, the tension spring assembly includes two tension springs, one end of which is connected to the bracket and the other end of which is connected to the corresponding connecting rod; The height limiting component includes a limiting block, a limiting pin, and a limiting screw threadedly connected to the connector. One end of the limiting screw passes through the connector and is close to the side of the bracket. The limiting block and the limiting pin are respectively installed on the upper and lower connecting rods. When the protective cover assembly moves down for protection, one end of the limiting screw blocks and limits the limiting block. When the protective cover assembly moves up and retracts, the limiting pin blocks and limits the limiting block.

[0009] Furthermore, the connector includes a connecting block and a pressure block, the other ends of the two connecting rods are movably connected to the connecting block, the protective cover assembly includes a protective cover shell, the protective cover shell is installed between the connecting block and the pressure block, one end of the limiting screw is inserted into the protective cover shell and the pressure block, and one end of the limiting screw is threadedly connected to the connecting block.

[0010] Furthermore, an observation window is provided on the protective cover, and a transparent plate that cooperates with the observation window is installed on the side of the protective cover away from the support through the protective cover cover.

[0011] Furthermore, a square handle is fixedly installed on the protective cover for controlling the up and down position of the protective cover.

[0012] Furthermore, tension spring hook seats are fixedly installed on the bracket and on both connecting rods, and the tension spring hook seats are provided with hook holes that engage with the ends of the tension springs.

[0013] Furthermore, the protective cover includes a first baffle, and a second baffle that is symmetrically arranged at the left and right ends of the first baffle and tilts forward.

[0014] Furthermore, the transparent plate is a transparent glass or acrylic plate.

[0015] Furthermore, the tension spring assembly, height limiting assembly, bracket, and connecting rod assembly constitute a support structure. There are two support structures, and the left and right ends of the protective cover assembly are respectively connected to the milling head housing through the support structures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a conventional milling machine protective cover device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the connection structure between the ordinary milling machine protective cover device and the vertical milling head housing of the ordinary milling machine according to an embodiment of the present invention; Figure 3 Embodiments of the present invention Figure 2 An explosion diagram; Figure 4 This is a schematic diagram of the structure of a conventional milling machine protective cover device in use when the workpiece is not being machined, according to an embodiment of the present invention; Figure 5 This is a schematic diagram showing the usage state of a conventional milling machine protective cover device during workpiece processing, according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the protective shell according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the tension spring hook seat according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the installation structure of the ordinary milling machine protective cover device on the vertical milling head housing of an ordinary milling machine according to an embodiment of the present invention; Figure 9 Embodiments of the present invention Figure 8 Rear view.

[0017] Explanation of reference numerals in the attached figures: 1. Protective cover assembly; 101. Protective cover shell; 1011. First baffle; 1012. Second baffle; 102. Transparent plate; 103. Protective cover shell; 104. Observation window; 105. Square handle; 2. Tension spring assembly; 201. Tension spring; 202. Tension spring hook seat; 203. Hook hole; 3. Height limit assembly; 301. Limiting screw; 302. Limiting block; 303. Limiting pin; 4. Worktable; 5. Vertical milling head shell; 6. Bracket; 7. Connecting rod assembly; 701. Connecting rod; 702. Connecting piece; 7021. Connecting block; 7022. Pressure block. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application are described clearly and completely below with reference to the accompanying drawings. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the specification of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," "comprise," etc., in the specification, claims, and accompanying drawings of this application are open-ended terms, indicating that a method comprises one or more steps, or an apparatus comprises one or more elements, but do not exclude the inclusion of other steps or elements. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or primary / secondary relationship. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] Furthermore, in the attached diagram, the X-axis represents the vertical direction, that is, the front-to-back position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the back; in the attached diagram, the Y-axis represents the horizontal direction, that is, the left-to-right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up-to-down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0022] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0025] See Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 The present invention provides a common milling machine protective cover device, including a protective cover assembly 1, a tension spring assembly 2, a height limiting assembly 3, and a bracket 6 mounted on the vertical milling head housing 5; A connecting rod assembly 7 is movably connected between the protective cover assembly 1 and the bracket 6. One end of the tension spring assembly 2 is connected to the bracket 6, and the other end is connected to the connecting rod assembly 7, which is used to adjust the up and down position of the protective cover assembly 1. The height limiting component 3 is used to fix the height position of the protective cover component 1 when the workpiece is being processed or not.

[0026] In this embodiment, the ordinary milling machine protective cover device is constructed by installing a bracket 6 on the vertical milling head housing 5 of the ordinary milling machine, and then using a protective cover assembly 1 and a connecting rod assembly 7. One end of the connecting rod assembly 7 is movably connected to the protective cover assembly 1, and the other end of the connecting rod assembly 7 is movably connected to the bracket 6. A tension spring assembly 2 is then used, with one end connected to the bracket 6 and the other end connected to the connecting rod assembly 7. When the operator is machining the workpiece, they pull down on the protective cover assembly 1, causing it to move between the protective cover assembly 1 and the bracket 6 via the connecting rod assembly 7, thereby moving the protective cover assembly 1 to the observation position. The support of the connecting rod assembly 7 and the limiting position of the height limiting assembly 3 keep the protective cover assembly 1 at the observation position, thus fixing the protective cover assembly 1 on the ordinary milling machine. At the workpiece machining position between the lower end of the vertical milling head housing 5 and the worktable 4 of the ordinary milling machine, the protective cover assembly 1 protects the operator from being scalded or burned by splashing cutting fluid, effectively protecting the operator's personal safety and preventing cutting fluid from contaminating the working environment, thus keeping the working environment clean. When the operator is not machining a workpiece, pulling the protective cover assembly 1 upwards limits its movement to a height limit assembly 3, preventing it from moving further upwards. The connecting rod assembly 7 supports the stopped protective cover assembly 1, and the tension spring assembly 3 keeps the protective cover assembly 1 in its stopped position. This ordinary milling machine protective cover device has a simple structure, is easy to operate, and can effectively improve product processing efficiency.

[0027] See Figures 3-5 Optionally, the linkage assembly 7 includes two parallel connecting rods 701 and a connector 702 mounted on the protective cover assembly 1. One end of the two connecting rods 701 is movably connected to the bracket 6, and the other end is movably connected to the connector 702.

[0028] In this embodiment, by installing a connector 702 on the protective cover assembly 1, one end of the two connecting rods 701 is movably connected to the bracket 6, and the other end is movably connected to the connector 702. This facilitates the rotatable connection and installation of the two connecting rods 701 with the protective cover assembly 1 and the bracket 6, and further facilitates the movable installation of the protective cover assembly 1 and the bracket 6. Thus, the bracket 6, which is installed on the vertical milling head housing 5 of a conventional milling machine, provides a support point for the use of the protective cover assembly 1. By rotating the two parallel connecting rods 701 between the connector 702 and the bracket 6, it is easy to pull and move the protective cover assembly 1 up and down.

[0029] See Figures 3-5 Optionally, the tension spring assembly 2 includes two tension springs 201, one end of which is connected to the bracket 6 and the other end is connected to the corresponding connecting rod 701; The height limiting component 3 includes a limiting block 302, a limiting pin 303, and a limiting screw 301 threadedly connected to the connector 702. One end of the limiting screw 301 passes through the connector 702 and is close to one side of the bracket 6. The limiting block 302 and the limiting pin 303 are respectively installed on the upper and lower connecting rods 701. When the protective cover component 1 moves down to protect, one end of the limiting screw 301 blocks and limits the limiting block 302. When the protective cover component 1 moves up and retracts, the limiting pin 303 blocks and limits the limiting block 302.

[0030] In this embodiment, when the operator is machining the workpiece, the protective cover assembly 1 is pulled down. The two parallel connecting rods 701 in the connecting rod assembly 7 rotate on the connector 702 and the bracket 6, causing the protective cover assembly 1 to move downwards until one end of the limiting screw 301 contacts the limiting block 302 on the lower connecting rod 701, blocking and limiting its movement. At this point, under the weight of the protective cover assembly 1, one end of the limiting screw 301 contacts and presses against the limiting block 302, thus stopping the protective cover assembly 1 at the observation position. This fixes the protective cover assembly 1 at the workpiece machining position between the lower end of the vertical milling head housing 5 of the ordinary milling machine and the worktable 4 of the ordinary milling machine. The protective cover assembly 1 provides safety protection for the operator during workpiece machining. The protective cover assembly 1 is designed to prevent hot cutting fluid from splashing and scalding operators or burning their clothing, ensuring operator safety and preventing hot cutting fluid from contaminating the work environment, thus maintaining a clean workspace. Furthermore, the position of the protective cover assembly 1 can be adjusted according to the height of the worktable 4 of the ordinary milling machine. For example, by turning the limit screw 301 counterclockwise on the connector 702, the distance between one end of the limit screw 301 and the limit block 302 is increased, allowing the protective cover assembly 1 to continue moving downwards until one end of the limit screw 301 contacts and presses against the limit block 302, thus blocking and limiting its movement. Conversely, by turning the limit screw 301 clockwise on the connector 702, the protective cover can be adjusted upwards (by a smaller amount). When the operator is not processing the workpiece (i.e., when installing or removing the workpiece), pulling the protective cover assembly 1 upward causes the two parallel connecting rods 701 in the connecting rod assembly 7 to rotate on the connecting piece 702 and the bracket 6, moving the protective cover assembly 1 upward until the limiting block 302 contacts the limiting pin 303. The limiting pin 303 then blocks and limits the moving limiting block 302, further preventing the two parallel connecting rods 701 in the connecting rod assembly 7 from rotating on the connecting piece 702 and the bracket 6, thus preventing the protective cover assembly 1 from moving further upward. At the same time, under the tension of the two tension springs 201 in the tension spring assembly 2, the protective cover assembly 1 is fixed at this position. This moves the protective cover assembly 1 from the observation position to the upper position of the vertical milling head housing 5 of the ordinary milling machine and fixes it, making it convenient for the operator to load and unload materials.

[0031] See Figures 3-5 Optionally, the connector 702 includes a connecting block 7021 and a pressure block 7022. The other ends of the two connecting rods 701 are movably connected to the connecting block 7021. The protective cover assembly 1 includes a protective cover 101, which is installed between the connecting block 7021 and the pressure block 7022. One end of the limiting screw 301 is inserted into the protective cover 101 and the pressure block 7022, and the other end of the limiting screw 301 is threadedly connected to the connecting block 7021.

[0032] In this embodiment, when the protective cover assembly 1 is moved to the observation position, the protective cover shell 101 in the protective cover assembly 1 provides safety protection for the operator during workpiece processing, preventing the operator from being scalded or burned by splashing cutting fluid, ensuring the operator's personal safety, and also preventing the splashing of cutting fluid from polluting the on-site working environment, keeping the on-site working environment clean; the protective cover shell 101 is installed between the connecting block 7021 and the pressure block 7022, and the three are fixed together with fasteners (such as screws, bolts, screws), and the other end of the two connecting rods 701 is fixed. The connecting block 7021 is movably connected to the connecting rod 701, thereby connecting the other end of the two connecting rods 701 to the protective cover 101, allowing the other end of the two connecting rods 701 to rotate with the protective cover 101. The limiting screw 301 is inserted and engaged with the protective cover 101 and the pressure block 7022, and the limiting screw 301 is threadedly connected to the connecting block 7021, making it easy to turn the limiting screw 301 left and right, so that the limiting screw 301, together with the limiting block 302, can adjust the height of the lowered protective cover 101 by an appropriate amount.

[0033] See Figure 3 and Figure 4 Optionally, an observation window 104 is provided on the protective cover 101, and a transparent plate 102 that cooperates with the observation window 104 is installed on the side of the protective cover 101 away from the bracket 6 through the protective cover cover 103.

[0034] In this embodiment, an observation window 104 is opened on the protective cover 101, and a transparent plate 102 is used at the observation window 104. The transparent plate 102 is installed on the protective cover 101 with fasteners (such as screws, bolts, screws) through the protective cover 103. When the protective cover assembly 1 is moved to the observation position, the protective cover 101 in the protective cover assembly 1 provides safety protection for the operator during workpiece processing. When the operator needs to observe the workpiece processing, the workpiece processing can be easily observed through the observation window 104 via the transparent plate 102. This achieves both safety protection and observation of the workpiece processing, making it convenient for the operator to work.

[0035] See Figure 3 Optionally, a square handle 105 is fixedly installed on the protective cover 101 for controlling the up and down position of the protective cover 101.

[0036] In this embodiment, the operator can move the protective cover assembly 1 up and down by grabbing the square handle 105, thereby facilitating the control / adjustment of the vertical position of the protective cover 101.

[0037] See Figure 5 and Figure 7 Optionally, a tension spring hook seat 202 is fixedly installed on the bracket 6 and the two connecting rods 701. The tension spring hook seat 202 has a hook hole 203 that engages with the end of the tension spring 201.

[0038] In this embodiment, a required number of tension spring hook seats 202 are fixedly installed on the bracket 6 and the two connecting rods 701. Then, one end of the tension spring 201 is hooked into the hook hole 203 of the tension spring hook seat 202 at the corresponding position on the bracket 6, which facilitates the connection between one end of the tension spring 201 and the bracket 6. Then, the other end of the tension spring 201 is hooked into the hook hole 203 of the tension spring hook seat 202 on the corresponding connecting rod 701, which facilitates the connection between the other end of the tension spring 201 and the corresponding connecting rod 701, making it convenient to use the tension spring 201.

[0039] See Figure 6 Optionally, the protective cover 101 includes a first baffle 1011, and the left and right ends of the first baffle 1011 are symmetrically provided with forward-inclined second baffles 1012.

[0040] In this embodiment, the first baffle 1011 provides main shielding protection for the operator directly in front, and the two forward-tilted second baffles 1012 provide shielding protection for the operator's side (i.e., left and right) position. This can greatly reduce the risk of cutting fluid splashing and scalding the operator or burning the operator's clothing and polluting the on-site working environment.

[0041] See Figure 3Optionally, the transparent plate 102 is transparent glass or acrylic plate.

[0042] In this embodiment, both the transparent glass and the acrylic sheet are transparent structures. Together with the protective cover 101, they serve to shield and protect the workpiece while also allowing the operator to observe the workpiece processing through the observation window 104.

[0043] See Figure 1 Optionally, the tension spring assembly 2, the height limiting assembly 3, the bracket 6, and the connecting rod assembly 7 constitute a support structure. There are two support structures. The left and right ends of the protective cover assembly 1 are connected to the milling head housing 5 through the support structures.

[0044] In this embodiment, a support structure is formed by the tension spring assembly 2, the height limiting assembly 3, the bracket 6, and the connecting rod assembly 7. Then, a support structure is used at each of the left and right ends of the protective cover assembly 1 to connect with the vertical milling head housing 5, thereby improving the stability of the protective cover assembly 1 when it is pulled up and down after being installed on the vertical milling head housing 5 of a conventional milling machine.

[0045] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A protective cover device for a common milling machine, characterized in that, Includes a protective cover assembly (1), a tension spring assembly (2), a height limiting assembly (3), and a bracket (6) mounted on the milling head housing (5); A connecting rod assembly (7) is movably connected between the protective cover assembly (1) and the bracket (6). One end of the tension spring assembly (2) is connected to the bracket (6), and the other end is connected to the connecting rod assembly (7) to adjust the up and down position of the protective cover assembly (1). The height limiting component (3) is used to fix the height position of the protective cover component (1) when the workpiece is being processed or not processed.

2. The protective cover device for a conventional milling machine according to claim 1, characterized in that, The linkage assembly (7) includes two parallel linkages (701) and a connector (702) mounted on the protective cover assembly (1). One end of the two linkages (701) is movably connected to the bracket (6), and the other end is movably connected to the connector (702).

3. The protective cover device for a conventional milling machine according to claim 2, characterized in that, The tension spring assembly (2) includes two tension springs (201), one end of which is connected to the bracket (6) and the other end is connected to the corresponding connecting rod (701); The height limiting component (3) includes a limiting block (302), a limiting pin (303), and a limiting screw (301) threadedly connected to the connector (702). One end of the limiting screw (301) passes through the connector (702) and is close to one side of the bracket (6). The limiting block (302) and the limiting pin (303) are respectively installed on the upper and lower connecting rods (701). When the protective cover assembly (1) moves down for protection, one end of the limiting screw (301) blocks and limits the limiting block (302). When the protective cover assembly (1) moves up and retracts, the limiting pin (303) blocks and limits the limiting block (302).

4. The protective cover device for a conventional milling machine according to claim 3, characterized in that, The connector (702) includes a connecting block (7021) and a pressure block (7022). The other ends of the two connecting rods (701) are movably connected to the connecting block (7021). The protective cover assembly (1) includes a protective cover shell (101). The protective cover shell (101) is installed between the connecting block (7021) and the pressure block (7022). One end of the limiting screw (301) is inserted into the protective cover shell (101) and the pressure block (7022). One end of the limiting screw (301) is threadedly connected to the connecting block (7021).

5. The protective cover device for a conventional milling machine according to claim 4, characterized in that, The protective cover (101) has an observation window (104), and a transparent plate (102) that cooperates with the observation window (104) is installed on the side of the protective cover (101) away from the bracket (6) through the protective cover cover (103).

6. The protective cover device for a conventional milling machine according to claim 5, characterized in that, A square handle (105) is fixedly installed on the protective shell (101) for controlling the up and down position of the protective shell (101).

7. The protective cover device for a conventional milling machine according to claim 2, characterized in that, A tension spring hook seat (202) is fixedly installed on the bracket (6) and on the two connecting rods (701). The tension spring hook seat (202) has a hook hole (203) that engages with the end of the tension spring (201).

8. The protective cover device for a conventional milling machine according to claim 6, characterized in that, The protective cover (101) includes a first baffle (1011), and the left and right ends of the first baffle (1011) are symmetrically provided with forward-inclined second baffles (1012).

9. The protective cover device for a conventional milling machine according to claim 5, characterized in that, The transparent plate (102) is a transparent glass or acrylic plate.

10. The protective cover device for a conventional milling machine according to claim 1, characterized in that, The tension spring assembly (2), height limiting assembly (3), bracket (6) and connecting rod assembly (7) constitute a support structure. There are two support structures. The left and right ends of the protective cover assembly (1) are connected to the vertical milling head housing (5) through the support structure.

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