Protective door, protective enclosure and machine tool

Abstract

The utility model relates to the field of protective door, concretely relates to a protective door, protective cover and machine tool, and the protective door includes first door body, second door body and guide structure, is provided with first sliding part and second sliding part on the first door body, is provided with third sliding part and fourth sliding part on the second door body. When installing the door body, make the sliding part present first sliding part, third sliding part, second sliding part and fourth sliding part linear arrangement mode in proper order, and then make the first door body and the second door body can be installed in the same guide structure, so that the installation of the door body does not need to set again two slide rails, effectively saves the space and cost.

Description

Technical Field

[0001] This utility model relates to the field of protective doors, specifically to a protective door, a protective cover, and a machine tool. Background Technology

[0002] In existing technology, the sliding door of a machine tool consists of two door bodies, each with two corresponding slide rails. Each door body slides on its corresponding slide rail to open / close the door. However, using two slide rails for two door bodies occupies a large amount of space, and the slide rail configuration also increases the cost, thus raising the overall cost.

[0003] Therefore, how to reduce the high cost and large space occupation caused by using two sliding rails for two doors is a technical problem that needs to be further solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide a protective door, a protective cover, and a machine tool.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] This utility model provides a protective door, comprising:

[0007] The door body includes a first door body and a second door body stacked on top of each other. A first sliding part and a second sliding part are spaced apart on the top and / or bottom of the first door body. A third sliding part and a fourth sliding part are spaced apart on the top and / or bottom of the second door body. The positions of the first sliding part and the second sliding part on the first door body correspond to the positions of the third sliding part and the fourth sliding part on the second door body.

[0008] The guide structure includes a first sliding part, a third sliding part, a second sliding part, and a fourth sliding part arranged in sequence and all movably connected to the guide structure. The first door body and the second door body are movably arranged along the guide structure.

[0009] Furthermore, the third sliding part, the fourth sliding part and the second door body are located on the same plane, and the first sliding part and the second sliding part extend toward the second door body so that the first sliding part, the second sliding part, the third sliding part and the fourth sliding part are located on the same straight line;

[0010] Alternatively, the first and second sliding parts extend toward the second door body, and the third and fourth sliding parts extend toward the first door body, so that the first, second, third, and fourth sliding parts are located on the same straight line.

[0011] Furthermore, the guide structure includes a fixed plate, a connecting plate, and a guide strip connected in sequence; guide grooves are provided on the first sliding part, the third sliding part, the second sliding part, and the fourth sliding part, and the guide strip is disposed within the guide grooves; or,

[0012] The guide structure is provided with a sliding groove, and the first sliding part, the third sliding part, the second sliding part and the fourth sliding part are all provided with pulleys inserted in the sliding groove.

[0013] Furthermore, the top of the first door body is provided with a first extension portion along the moving direction, and the top of the second door body is provided with a second extension portion along the moving direction. Both the first and second extension portions are located on the closing direction side of the door body, and a first sliding portion and a third sliding portion are correspondingly provided on the first and second extension portions; and / or,

[0014] The first sliding part, the second sliding part, the third sliding part and the fourth sliding part all include a slide base and a slider, and the slider is detachably mounted on the slide base.

[0015] Furthermore, it also includes a support rail, a first sliding part and a second sliding part are disposed at the top of the first door body, a third sliding part and a fourth sliding part are slidably disposed at the top of the second door body, a guide structure is disposed above the first door body and the second door body, a support rail is disposed below the first door body and the second door body, and a support pulley is disposed at the bottom end of both the first door body and the second door body, and the support pulley is slidably disposed on the support rail.

[0016] Furthermore, the second door body extends along the thickness direction and is provided with a third extension. The support pulleys on the second door body are provided on the third extension, and the support pulleys on the first door body and the second door body are provided on the same support guide rail.

[0017] Both the first and second doors are equipped with limit structures. The support rails are provided with downward-facing limit grooves, and the limit structures are inserted into the limit grooves. The sides of the first door are provided with anti-collision structures.

[0018] Furthermore, the protective door also includes a linkage mechanism, which is connected to the first door body and the second door body. The first door body drives the second door body to move through the linkage mechanism, or the second door body drives the first door body to move through the linkage mechanism.

[0019] Furthermore, the linkage mechanism includes a first link, a second link, a third link, a fourth link, a fifth link, a sixth link, a first rotating column, a second rotating column, and a third rotating column. The first rotating column is located on the first door body, the second rotating column is located on the side of the second door body away from the first door body, and the third rotating column is used to connect to the external structure.

[0020] The first, second, and third links are rotatably connected in sequence, as are the fourth, fifth, and sixth links. The second and fifth links are arranged in a cross configuration, with the cross portion rotatably mounted on the second rotating column. The side of the first and fourth links away from the cross portion is rotatably connected to the first rotating column, and the side of the third and sixth links away from the cross portion is rotatably connected to the third rotating column.

[0021] A second aspect of this utility model provides a protective cover, including a cover body and a protective door of any of the above. The cover body is surrounded by metal plates, and at least one side of the cover body is provided with a door frame. The protective door is located at the door frame, and a guide structure is fixed above and / or below the perimeter of the door frame.

[0022] A third aspect of this utility model provides a machine tool, including a machine tool body and the aforementioned protective cover, wherein the protective cover is disposed on the machine tool body.

[0023] The beneficial effects of this utility model are as follows: when the door is installed, the sliding parts are staggered, so that the sliding parts are arranged in a sequential and linear manner, namely the first sliding part, the third sliding part, the second sliding part and the fourth sliding part. This allows the first door and the second door to be installed on the same guide structure, so that the installation of the door does not require two sliding rails, effectively saving space and cost. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of the protective door of this utility model when closed;

[0026] Figure 2 This is a schematic diagram of the structure of the protective door of this utility model when it is opened;

[0027] Figure 3 This is an exploded view of the structure of the protective door of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the protective door of this utility model applied to the protective cover.

[0029] The attached figures are labeled as follows:

[0030] 1-Gate body,

[0031] 11-First door body, 111-First sliding part, 112-Second sliding part, 113-First extension part,

[0032] 12-Second door body, 121-Third sliding part, 122-Third sliding part, 123-Second extension part, 124-Third extension part;

[0033] 13-Slide block, 14-Slider, 15-Guide groove;

[0034] 2-Guide structure, 21-Fixing plate, 22-Connecting plate, 23-Guide strip;

[0035] 3-Support rail, 31-Limiting groove, 4-Support pulley, 5-Limiting structure, 6-Anti-collision structure;

[0036] 7-Linkage mechanism, 71-First link, 72-Second link, 73-Third link, 74-Fourth link, 75-Fifth link, 76-Sixth link, 77-First rotating column, 78-Second rotating column, 79-Third rotating column

[0037] 8-Cover body. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0039] A first aspect of the present invention provides a protective door, as shown in the reference... Figure 1 and Figure 2 It mainly consists of two parts: the door body 1 and the guide structure 2. The door body 1 adopts a double-layer design, consisting of a first door body 11 and a second door body 12 stacked together. The guide structure 2 enables orderly movement to meet the functional requirements of opening and closing the protective door.

[0040] The first door body 11 is one of the basic layers of the protective door. It is generally rectangular and flat, and can be made of high-strength alloy steel plate to ensure sufficient structural strength. A first sliding part 111 and a second sliding part 112 are spaced apart at the top of the first door body 11. Both the first sliding part 111 and the second sliding part 112 are cuboid in shape. The first sliding part 111 is located near the left edge of the top of the first door body 11, and the second sliding part 112 is located near the right edge of the top of the first door body 11. The distance between them is designed according to the size and layout of the guide structure 2, for example, a distance of 500mm.

[0041] The second door body 12 is also rectangular and flat, stacked on top of the first door body 11, and is also made of high-strength alloy steel plate. A third sliding part 121 and a fourth sliding part 122 are spaced apart at the top of the second door body 12. The third sliding part 121 and the fourth sliding part 122 are cuboid in shape. The third sliding part 121 is located near the left edge of the top of the second door body 12, and the fourth sliding part 122 is located near the right edge of the top of the second door body 12. The distance between them is the same as the distance between the first sliding part 111 and the second sliding part 112, for example, 500mm. The guide structure 2 is a guide rail structure arranged in a straight line, and the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 all move along the guide structure 2.

[0042] In this embodiment, the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 are all disposed at the top of the door body 1. In other embodiments, the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 may also be disposed at the bottom of the door body 1, depending on the actual situation or requirements.

[0043] With the first door body 1 and the second door body 2 assembled, the first sliding part 111, the third sliding part 121, the second sliding part 112, and the fourth sliding part 122 are arranged sequentially and are all movably connected to the guide structure. When the protective door needs to be opened, a pulling or pushing force is applied by an external power device (such as a chain or belt drive system driven by a motor), causing the first door body 11 and the second door body 12 to move along the guide structure 2 in the opening direction (e.g., ...). Figure 1 The door moves to the right side. During the movement, the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 slide smoothly on the guide structure 2. When the first door body 11 and the second door body 12 move to the designated position, the protective door completes the opening action. (Refer to...) Figure 2 As shown. When closing the protective door, the power unit applies a force in the opposite direction, causing the first door body 11 and the second door body 12 to move in opposite directions along the guide structure 2 until they return to their initial positions, thus closing the protective door. (Refer to...) Figure 1 As shown.

[0044] In this application, when the door body 1 is installed, the positions of the sliding parts can be staggered so that the sliding parts are arranged in a sequential and linear manner, namely the first sliding part 111, the third sliding part 121, the second sliding part 112 and the fourth sliding part 122. This allows the first door body 11 and the second door body 12 to be installed on the same guide structure 2, so that the installation of the door body 1 does not require the installation of two slide rails, effectively saving space and cost.

[0045] In one specific implementation, reference is made to Figure 1 and Figure 2 The third sliding part 121, the fourth sliding part 122 and the second door body 12 are located on the same plane. The first sliding part 111 and the second sliding part 112 extend toward the second door body 12 so that the first sliding part 111, the second sliding part 112, the third sliding part 121 and the fourth sliding part 122 are located on the same straight line so that each sliding part can be connected to the same guide structure 2, so that the first door body 11 and the second door body 12 can move on the same guide structure 2.

[0046] In other embodiments, the first sliding portion 111 and the second sliding portion 112 may extend toward the second door body 12, and the third sliding portion 121 and the fourth sliding portion 122 may extend toward the first door body 11, so that the first sliding portion 111, the second sliding portion 112, the third sliding portion 121, and the fourth sliding portion 122 are located on the same straight line. In this scheme, the sliding portions on the first door body 11 and the sliding portions on the second door body 12 extend toward each other, so that each sliding portion extends toward a common axis. This eliminates the need for each sliding portion to extend excessively, avoiding the reduction of the supporting force of the sliding portion due to excessive extension, and avoiding the problem of easy deformation of the excessively long extension portion under gravity, thereby improving the assembly accuracy of the sliding portion and the guide rail structure 2.

[0047] In one specific implementation, reference is made to Figure 1 and Figure 2 The guide structure 2 is a high-strength, smooth-surfaced cylindrical guide rail. The guide structure 2 includes a fixed plate 21, a connecting plate 22, and a guide strip 23 connected in sequence. The diameter of the guide strip 23 is designed to fit the dimensions of the guide grooves 15 provided on the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122; for example, the guide rail diameter is 30mm. The fixed plate 21 is used to horizontally install on other equipment above the protective door to ensure stability during the movement of the door body 1, preventing shaking or deformation.

[0048] A guide groove 15 with a diameter slightly larger than the diameter of the guide strip 23 is formed on the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122, for example, the diameter of the guide groove 15 is 32mm, so that the guide strip 23 can pass smoothly through the guide groove 15. The opening of each guide groove 15 is slightly larger than the thickness of the connecting plate 22 so that the connecting plate 22 can pass through. During installation, the first door body 11 and the second door body 12 are stacked, so that the sliding parts are arranged in the order of the first sliding part 111, the third sliding part 121, the second sliding part 112, and the fourth sliding part 122. Then, the guide structure 2 passes through the guide groove 15 of the first sliding part 111, the third sliding part 121, the second sliding part 112, and the fourth sliding part 122, that is, the guide strip 23 passes through the guide groove 15, and the connecting plate 22 passes through the opening of the guide groove 15.

[0049] The guide groove 15 facilitates the passage of the guide strip 23, enabling the installation between the guide structure 2 and the door body 1, and also facilitating the installation of the guide structure 2 with other structures, such as... Figure 4 In this design, the guide structure 2 is mounted on the protective cover via the fixing plate 2; the slot on the guide groove 15 facilitates the passage of the connecting plate 22. The guide rail holes and the guide groove 15 make the installation of the guide structure 2 more convenient. In this design, the guide strip 23 is inserted from the axial direction of the guide groove 15. The opening of the guide groove 15 is slightly larger than the thickness of the connecting plate 22, and the width of the opening is smaller than the width or diameter of the guide strip 23, preventing the guide strip 23 from passing through. Thus, while allowing the connecting plate 22 to pass through, the opening also confines the guide strip 23 within the guide groove 15.

[0050] In addition to the aforementioned guide groove 15 configuration, in another embodiment, arc-shaped surfaces (not shown in the figure) can be provided on the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122. These arc-shaped surfaces facilitate the direct placement of the guide structure 2 from above the sliding part onto the arc-shaped surface. Unlike the above embodiment where guide grooves 15 are provided on the sliding parts, this arc-shaped surface configuration allows the guide strip 23 to be directly attached to the arc-shaped surface on the sliding part, eliminating the need to pass the guide strip 23 sequentially through the guide grooves 15 on the sliding parts. The arc-shaped surface configuration on the first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 greatly facilitates the assembly of the sliding parts and the guide rail structure.

[0051] In another specific embodiment, a sliding groove (not shown in the figure) can be provided on the guide structure 2, and pulleys inserted into the sliding groove are provided on the first sliding part 111, the third sliding part 121, the second sliding part 112, and the fourth sliding part 122. Specifically, the sliding groove has a "U" shaped cross-section, and the inner surface is finely machined to ensure smoothness and flatness, so as to reduce friction with the pulleys. The width and depth of the sliding groove are designed according to the size of the pulleys, for example, the width of the sliding groove is 50mm and the depth is 30mm. The sliding groove extends horizontally along the direction of movement of the protective door. During installation, the fixed frame with the sliding groove provided is installed first, and then the first door body 11 is placed in a suitable position so that the pulleys of the first sliding part 111 and the second sliding part 112 are inserted into the sliding groove. Then, the second door body 12 is stacked and the position is adjusted so that the pulleys of the third sliding part 121 and the fourth sliding part 122 are also inserted into the sliding groove, and the first door body 11 and the second door body 12 move along the sliding groove.

[0052] In one specific implementation, reference is made to Figure 1 and Figure 3 The first sliding part 111, the second sliding part 112, the third sliding part 121, and the fourth sliding part 122 all include a slide base 13 and a slider 14. The slider 14 is disposed on the slide base 13 to facilitate its installation and replacement. The guide groove 15 or arc-shaped surface in the above embodiment is disposed on the slider 14. The slide base 13 is a protruding structure on the door body 1, which is detachable, or it can be configured as an integral part of the door body 1. The slide base 13 on the second door body 12 extends a certain length toward the first door body 11, as shown in the reference... Figure 1 The third sliding part 121 and the slider 14 are detachably mounted on the slide block 13.

[0053] Furthermore, in embodiments where a sliding groove is provided on the guide structure 2, the slider 14 is an assembly with a pulley. The slider 14 is detachably mounted on the slide block 13 via bolts and nuts. The slide block 13 has mounting holes, and the slider 14 has corresponding through holes. During installation, the slider 14 is placed on the slide block 13, the bolt is passed through the through holes and mounting holes, and the nut is tightened to complete the installation. Disassembly is simple: just unscrew the nut and bolt to remove the slider 14. This detachable structure facilitates the maintenance and replacement of the pulley. When the pulley is worn or damaged, the slider 14 can be quickly replaced, restoring the normal operation of the protective door.

[0054] In one specific implementation, reference is made to Figure 1 and Figure 3 The first door body 11 has a first extension 113 at its top along the moving direction, and the second door body 12 has a second extension 123 at its top along the moving direction. The first extension 113 is located on the side of the first door body 11 along the closing direction of the moving door body 1 (e.g., Figure 3The second extension 123 is a long strip-shaped structure extending from the right side of the second door body 12 along the closing direction of the movable door body 1. The first sliding part 111 and the third sliding part 121 are correspondingly disposed on the first extension 113 and the second extension 123. The provision of the first extension 113 increases the distance between the first sliding part 111 and the second sliding part 112; the provision of the second extension 123 increases the distance between the third sliding part 121 and the fourth sliding part 122. During the opening / closing of the first door body 11 and the second door body 12, the third sliding part 121 moves between the first sliding part 111 and the second sliding part 112, and the second sliding part 112 moves between the third sliding part 121 and the fourth sliding part 122. The provision of the first extension 113 and the second extension 123 provides the second sliding part 112 and the third sliding part 121 with a larger movement space, thereby allowing the door body 1 to open wider.

[0055] In one specific implementation, reference is made to Figure 1 and Figure 2The protective door also includes a support rail 3 and support pulleys 4. The support rail 3 is located on the lower side of the door body 1 and is arranged parallel to the guide structure 2. Support pulleys 4 are provided at the bottom ends of both the first door body 11 and the second door body 12. The support pulleys 4 are fitted onto the support rail 3, and the first door body 11 and the second door body 12 move on the support rail 3 via their respective support pulleys 4. In this embodiment, there can be two support rails 3. The support pulleys 4 on the first door body 11 are mounted on the corresponding support rail 3, and the support pulleys 4 on the second door body 12 are mounted on the corresponding support rail 3. In another specific embodiment, the second door body 12 extends along its thickness direction with a third extension 124. The support pulleys 4 on the second door body 12 are mounted on the third extension 124, so that the support pulleys 4 on the second door body 12 can be mounted on the same support rail 3 as the support pulleys 4 on the first door body 11. The third extension 124 provides a suitable installation position for the support pulleys 4, allowing the support pulleys 4 on the first door body 11 and the second door body 12 to roll on the same support rail 3, saving the installation space of one support rail 3 and making the protective door structure more compact. The fact that the support pulleys 4 on the first door body 11 and the second door body 12 are mounted on the same support rail 3 ensures the synchronicity and coordination of the door body 1 during movement. The number of support pulleys 4 on the first door body 11 and the second door body 12 can be set as needed; for example, two support pulleys 4 can be provided on both the first door body 11 and the second door body 12. It should be noted that in this embodiment where the support pulleys 4 on the first door body 1 and the second door body 2 are mounted on the same support rail 3, the third extension 124 is configured in the same way as the alternating arrangement of the sliding parts, that is, the two support pulleys 4 on the first door body 1 and the two support pulleys 4 on the second door body 12 are arranged alternately to avoid collisions during the movement of the first door body 11 and the second door body 12.

[0056] In one specific implementation, reference is made to Figure 1 and Figure 2 The support guide rail 3 is provided with a downward-facing limiting groove 31, which is precisely formed by machining. Limiting structures 5 are provided near the edges of the lower ends of both the first door body 11 and the second door body 12. The upper end of each limiting structure 5 is connected to the lower end of the door body 1 by bolts, and the lower end of the limiting structure 5 is provided with a hook structure. The hook structures of the two limiting structures 5 are respectively inserted into the limiting grooves on the support guide rail 3 to ensure that the door body 1 does not deviate from the track during movement, while limiting the range of movement of the door body 1 and preventing the door body 1 from being over-opened or over-closed.

[0057] In one specific implementation, reference is made to Figure 1 and Figure 2The first door 11 has a side impact protection structure 6. Specifically, the first door 11 has an impact protection structure 6 on the side near the second door 12. The impact protection structure 6 is a flexible or elastic material protruding on the first door 11 to prevent the first door 11 from colliding with other structures.

[0058] In one specific implementation, reference is made to Figure 1 and Figure 2 The protective door also includes a linkage mechanism 7, which is connected to the first door body 11 and the second door body 12. The first door body 11 moves the second door body 12 via the linkage mechanism 7, or the second door body 12 moves the first door body 11 via the linkage mechanism 7. The linkage mechanism 7 can link the sliding movements of the two door bodies 11 and 12 to prevent collisions between the sliding parts. For example, during the opening of door 1, pushing or pulling the first door body 11 will transmit the power of the first door body 11 to the second door body 12 through the linkage mechanism 7. That is, the movement of the first door body 11 will drive the movement of the second door body 12 through the linkage mechanism 7, so that the second door body 12 follows the movement of the first door body 11, thus opening door 1. Conversely, closing door 1 involves pulling or pushing the first door body 11 in the opposite direction, and the first door body 11 drives the second door body 12 to move in the same direction, thus closing door 1.

[0059] Further, refer to Figure 1 and Figure 2 The linkage mechanism 7 includes a first link 71, a second link 72, a third link 73, a fourth link 74, a fifth link 75, a sixth link 76, a first rotating column 77, a second rotating column 78, and a third rotating column 79.

[0060] The first rotating column 77 is located on the side of the first door body 11 near the second door body 12 and is firmly connected to the first door body 11 by bolts. The first rotating column 77 provides a rotational support point for the first connecting rod 71 and the fourth connecting rod 74.

[0061] The second rotating column 78 is located on the side of the second door body 12 away from the first door body 11, and its material and size are the same as those of the first rotating column 77. The second rotating column 78 is the cross rotation center of the second link 72 and the fifth link 75, and plays a key role in the stable operation of the linkage mechanism 7.

[0062] The third rotating column 79 is used to connect to the external structure and provides rotational support for the third link 73 and the sixth link 76, ensuring that the entire linkage mechanism 7 has a stable fixed point during operation.

[0063] The first link 71, the second link 72, and the third link 73 are rotatably connected in sequence. One end of the first link 71 is rotatably connected to the first rotating column 77, and the other end is rotatably connected to the second link 72. The middle part of the second link 72 intersects with the fifth link 75, and the intersection part is rotatably connected to the second rotating column 78. The other end of the second link 72 is rotatably connected to the third link 73. The end of the third link 73 away from the second link 72 is rotatably connected to the third rotating column 79.

[0064] The fourth link 74, the fifth link 75, and the sixth link 76 are rotatably connected in sequence. One end of the fourth link 74 is rotatably connected to the first rotating post 77, and the other end is rotatably connected to the fifth link 75. The middle part of the fifth link 75 intersects with the second link 72, and the intersection is rotatably connected to the second rotating post 78. The other end of the fifth link 75 is rotatably connected to the sixth link 76. The end of the sixth link 76 furthest from the fifth link 75 is rotatably connected to the third rotating post 79. The materials and dimensions of the fourth, fifth, and sixth links are the same as those of the first, second, and third links.

[0065] The opening and closing process of the protective door of this application in practical applications is described in detail below:

[0066] Opening Process: When the protective door needs to be opened, the staff issues an opening command manually or through the control panel, and the electric push rod begins to extend outward. The thrust of the electric push rod is transmitted to the first door body 11 or the second door body 12 through the connection point, causing the first door body 11 and the second door body 12 to begin to move under the action of driving force. During the movement, the linkage mechanism 7 plays a role, and the first link 71, the second link 72, the third link 73, the fourth link 74, the fifth link 75, and the sixth link 76 rotate in sequence. Since the second link 72 and the fifth link 75 are cross-set on the second rotating column 78, the first link 71 and the fourth link 74 are connected to the first rotating column 77, and the third link 73 and the sixth link 76 are connected to the third rotating column 79, the entire linkage mechanism 7 gradually retracts, pushing the first door body 11 and the second door body 12 to slide and open to both sides. Simultaneously, the sliding part at the upper end of door 1 slides along the guide rail structure, and the support pulley 4 at the upper end of door 1 rolls on the support guide rail 3, ensuring that door 1 maintains stable and linear movement during opening, without shaking or jamming. When door 1 is fully opened to the set position, the protective door remains open, and the first door 11 and the second door 12 are approximately overlapping, as shown in the reference. Figure 2 .

[0067] Closing Process: When the protective door needs to be closed, the operator issues a closing command manually or via the control panel, and the electric push rod begins to retract. Under the pulling force of the electric push rod, the first door body 11 and the second door body 12 move towards the center. The linkage mechanism 7 extends accordingly, and each linkage rotates in sequence, causing the first door body 11 and the second door body 12 to gradually approach and eventually close. When the door body 1 is completely closed, the electric push rod stops working, the protective door is in a sealed state, and the first door body 11 and the second door body 12 are only partially overlapping. (See reference...) Figure 1 .

[0068] A second aspect of the present invention provides a protective cover, as shown in the reference... Figure 4 The enclosure includes a cover 8 and any of the aforementioned protective doors. The cover 8 is formed by surrounding metal plates, and at least one side of the cover 8 is provided with a door frame. The protective door is located at the door frame and is used to open / close the door frame. The guide structure 2 is fixed above and / or below the perimeter of the door frame. For example, the guide structure 2 is installed above the door frame, the support rail 3 is installed at the lower end of the door frame, and the third rotating column 79 is installed on the side of the door frame (e.g.,...). Figure 4 (The right side of the image). In this embodiment, the aforementioned protective door is applied to the protective cover of the machine tool to enable the opening and closing of the protective cover door frame.

[0069] A third aspect of this utility model provides a machine tool including the aforementioned protective cover. The protective cover is applied to the machine tool to enclose or cover the base of the machine tool. The protective cover of the machine tool generally covers the base of the machine tool; the protective cover of this application is applied to the base of the machine tool. The machine tool referred to in this application is a machine tool in the prior art, and all protective covers to which this application is applicable are within the scope of protection of this application.

[0070] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A protective door, characterized in that, include: The door body (1) includes a first door body (11) and a second door body (12) stacked together. A first sliding part (111) and a second sliding part (112) are spaced apart on the top and / or bottom of the first door body (11). A third sliding part (121) and a fourth sliding part (122) are spaced apart on the top and / or bottom of the second door body (12). The positions of the first sliding part and the second sliding part on the first door body (11) correspond to the positions of the third sliding part and the fourth sliding part on the second door body (12). The guide structure (2) includes a first sliding part (111), a third sliding part (121), a second sliding part (112), and a fourth sliding part (122) arranged in sequence and all movably connected to the guide structure (2). The first door body (11) and the second door body (12) are movably arranged along the guide structure (2).

2. The protective door according to claim 1, characterized in that, The third sliding part (121), the fourth sliding part (122) and the second door body (12) are located on the same plane, and the first sliding part and the second sliding part extend toward the second door body (12) so that the first sliding part, the second sliding part, the third sliding part and the fourth sliding part are located on the same straight line; Alternatively, the first sliding portion and the second sliding portion extend toward the second door body (12), and the third sliding portion (121) and the fourth sliding portion (122) extend toward the first door body (11), so that the first sliding portion, the second sliding portion, the third sliding portion and the fourth sliding portion are located on the same straight line.

3. The protective door according to claim 1, characterized in that, The guide structure (2) includes a fixed plate (21), a connecting plate (22), and a guide strip (23) connected in sequence. Guide grooves (15) are provided on the first sliding part (111), the third sliding part (121), the second sliding part (112), and the fourth sliding part (122), and the guide strip (23) is disposed within the guide grooves (15); or, The guide structure (2) is provided with a sliding groove, and the first sliding part (111), the third sliding part (121), the second sliding part (112) and the fourth sliding part (122) are all provided with pulleys inserted in the sliding groove.

4. The protective door according to claim 3, characterized in that, The top of the first door body (11) and the second door body (12) are each provided with a first extension (113) along the moving direction, and the top of the second door body (12) is provided with a second extension (123) along the moving direction. The first extension (113) and the second extension (123) are both located on the closing direction side of the door body (1). The first sliding part (111) and the third sliding part (121) are correspondingly provided on the first extension (113) and the second extension (123); and / or, The first sliding part (111), the second sliding part (112), the third sliding part (121) and the fourth sliding part (122) each include a slide base (13) and a slider (14), and the slider (14) is detachably mounted on the slide base (13).

5. The protective door according to claim 4, characterized in that, It also includes a support rail (3), the first sliding part (111) and the second sliding part (112) are disposed at the top of the first door body (11), the third sliding part (121) and the fourth sliding part (122) are slidably disposed at the top of the second door body (12), the guide structure (2) is disposed above the first door body (11) and the second door body (12), the support rail (3) is disposed below the first door body (11) and the second door body (12), and the bottom ends of the first door body (11) and the second door body (12) are each provided with a support pulley (4), and the support pulley (4) is slidably disposed on the support rail (3).

6. The protective door according to claim 5, characterized in that, The second door body (12) extends along the thickness direction and is provided with a third extension (124). The support pulley (4) on the second door body (12) is provided on the third extension (124). The support pulley (4) on the first door body (11) and the second door body (12) are provided on the same support guide rail (3). Both the first door body (11) and the second door body (12) are provided with limiting structures (5), and the supporting guide rail (3) is provided with a limiting groove (31) with the groove facing downward. The limiting structure (5) is inserted into the limiting groove (31); the side of the first door body (11) is provided with an anti-collision structure (6).

7. The protective door according to any one of claims 1-6, characterized in that, The protective door also includes a linkage mechanism (7), which is connected to the first door body (11) and the second door body (12). The first door body (11) drives the second door body (12) to move through the linkage mechanism (7), or the second door body (12) drives the first door body (11) to move through the linkage mechanism (7).

8. The protective door according to claim 7, characterized in that, The linkage mechanism (7) includes a first link (71), a second link (72), a third link (73), a fourth link (74), a fifth link (75), a sixth link (76), a first rotating column (77), a second rotating column (78), and a third rotating column (79). The first rotating column (77) is disposed on the first door body (11), the second rotating column (78) is disposed on the side of the second door body (12) away from the first door body (11), and the third rotating column (79) is used to connect to the external structure. The first link (71), the second link (72), and the third link (73) are rotatably connected in sequence, and the fourth link (74), the fifth link (75), and the sixth link (76) are rotatably connected in sequence; the second link (72) and the fifth link (75) are arranged in a cross configuration, and the cross configuration is rotatably mounted on the second rotating column (78); the side of the first link (71) and the fourth link (74) away from the cross configuration is rotatably connected to the first rotating column (77); the side of the third link (76) away from the cross configuration is rotatably connected to the third rotating column (79).

9. A protective cover, characterized in that, The device includes a cover (8) and a protective door as described in any one of claims 1-8. The cover (8) is surrounded by metal plates. At least one side of the cover (8) is provided with a door frame. The protective door is located at the door frame. The guide structure (2) is fixed above and / or below the perimeter of the door frame.

10. A machine tool, characterized in that, It includes a machine tool body and a protective cover as described in claim 9, wherein the protective cover is disposed on the machine tool body.

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