Protective device for lathe

Abstract

The utility model relates to the technical field of lathe protection, and discloses a lathe protection device which comprises a protection cover, a limiting structure and a supporting column arranged on a spindle box, the protection cover is provided with a connecting end arranged outside the supporting column in a sleeving mode, and the connecting end can rotate around the supporting column. The protective cover is arranged on the supporting column in the axial direction so that the protective cover can be provided with a protective position arranged outside the chuck in a covering mode and an avoiding position rotating to the side portion of the chuck, the connecting end can move in the axial direction of the supporting column, and the limiting structure acts on the protective cover so that the protective cover can be limited to the protective position. And then the distance between the protective cover and the spindle box can be adjusted, so that the protective device can be suitable for various chucks of different models, and the flexibility of the protective device is improved.

Description

Technical Field

[0001] This application belongs to the technical field of lathe protection, and particularly relates to a protection device for a lathe. Background Art

[0002] A lathe is a machine tool for turning a rotating workpiece with a turning tool. It includes a headstock with a chuck. The chuck is used to fix the workpiece and can drive the workpiece to rotate, so that the workpiece can rotate relative to the tool, thereby realizing the turning of the workpiece by the tool. However, when the lathe is working, the chuck rotates at a high speed and is exposed, which poses a great safety hazard to the operator.

[0003] Currently, in order to increase the safety of the lathe, a protective cover is usually provided on the headstock, and the protective cover can rotate relative to the headstock, so that the protective cover has a protective position covering the chuck and an avoidance position rotated to the side of the chuck; due to different models of chucks, the required protective positions are different, and the distance between the protective cover and the headstock cannot be adjusted, so it is necessary to design corresponding protective covers according to different chucks, which affects the flexibility of the protective cover. Summary of the Utility Model

[0004] This application provides a protection device for a lathe, so that the distance between the protective cover and the headstock can be adjusted to increase the flexibility of the protective cover.

[0005] The technical solution adopted in this application is as follows:

[0006] A protection device for a lathe includes a protective cover, a limiting structure, and a support column provided on the headstock. The protective cover has a connection end sleeved outside the support column. The connection end can rotate around the support column, so that the protective cover has a protective position covering the outside of the chuck and an avoidance position rotated to the side of the chuck, and the connection end can move along the axial direction of the support column. The limiting structure acts on the protective cover to limit the protective cover in the protective position.

[0007] By adopting the above technical solution, when using the protection device in the present application, first install the support column on the spindle box of the lathe, then sleeved the connection section of the protective cover on the support column, and then adjust the protective cover so that the connection end moves along the axial direction of the support column, so that the protective cover faces the chuck on the spindle box, that is, the protective cover can cover the outside of the chuck. When installing the workpiece, first rotate the protective cover so that the connection end rotates relative to the support column, and then the protective cover rotates from the protection position to the avoidance position. Then install the workpiece on the chuck, and then rotate the protective cover in the reverse direction so that the protective cover rotates from the avoidance position to the protection position. At this time, the limiting structure limits the protective cover so that the protective cover stays stably in the protection position, and further makes the protective cover protect the high-speed rotating chuck to avoid harm to the operator.

[0008] Since the protective cover in the present application can move along the axial direction of the support column, the distance between the protective cover and the spindle box can be adjusted, so that the protection device in the present application can be applied to various different types of chucks, thereby increasing the flexibility of the protection device.

[0009] Optionally, the protective cover includes a cover body and a connecting member provided at the end of the cover body. The connecting member has a receiving space for receiving the support column. The limiting structure includes a limiting block provided on the inner wall of the receiving space and a limiting groove provided on the support column. When the protective cover is in the protection position, the limiting block is in abutting cooperation with the groove wall of the limiting groove.

[0010] By adopting the above technical solution, when rotating the protective cover, the cover body drives the connecting member to rotate, and the connecting member drives the limiting block to rotate, and then the limiting block and the limiting groove rotate relative to each other. When the limiting block abuts against the groove wall of the limiting groove, the protective cover cannot continue to rotate to realize the limitation of the protective cover. Since the limiting groove has two groove walls in the circumferential direction of the support column, when the limiting block is in abutting cooperation with the inner groove wall of the limiting groove, the protective cover is limited in the protection position, and when the limiting block is in abutting cooperation with the outer groove wall of the limiting groove, the protective cover is limited in the avoidance position to increase the stability of the protective cover. In addition, since the protection device in the present application can limit the avoidance position of the protective cover, the protective cover can be relatively closer to the top of the spindle box when in the avoidance position, so that the operator can drive the protective cover to the protection position, thereby improving the operator's use experience.

[0011] Optionally, the connecting member includes a first connecting portion and a second connecting portion detachably connected to the first connecting portion. The first connecting portion and the second connecting portion together form the receiving space, and the limiting block is provided on one of the first connecting portion and the second connecting portion.

[0012] By adopting the above technical solution, since the connecting member includes a first connecting portion and a second connecting portion, and the limiting block is provided on the first connecting portion or the second connecting portion, the production difficulty of the connecting member is reduced, the production efficiency of the connecting member is improved, and the production cost of the protection device is reduced at the same time.

[0013] Optionally, extension pieces are respectively extended on the first connecting portion and the second connecting portion, and the two extension pieces are respectively located on both sides of the cover body to squeeze and fix the cover body.

[0014] By adopting the above technical solution, when assembling the protective cover, first place the first connecting portion and the second connecting portion on both sides of the cover body respectively, so that the two extension pieces are respectively located on both sides of the cover body, and then fixedly connect the first connecting portion and the second connecting portion together. At this time, the two extension pieces exert a squeezing force on the cover body, so that the cover body is fixedly connected to the two extension pieces under the action of the squeezing force, so as to achieve the effect of facilitating the assembly of the protective cover, and at the same time, it can also achieve the effect of facilitating the replacement of the cover body. In addition, the extension pieces can also support the cover body to increase the connection stability between the cover body and the connecting member.

[0015] Optionally, the connecting member is provided with a fastening member passing through the two extension pieces and the cover body.

[0016] By adopting the above technical solution, the cover body is installed between the connecting members, and then the fastening member is installed on the extension pieces, so that the fastening member passes through the two extension pieces and the cover body to further increase the connection stability between the cover body and the connecting member.

[0017] Optionally, it further includes a travel switch provided on the support column, the travel switch is connected in series with the controller of the main spindle box. When the protective cover is in the protection position, the protective cover presses the travel switch to make the travel switch conduct. When the protective cover is in the avoidance position, the protective cover is separated from the travel switch to make the travel switch turn off.

[0018] By adopting the above technical solution, after the protective cover is driven to the protection position, the protective cover presses the travel switch, and then the travel switch conducts. At this time, the controller of the main spindle box is started, and the main spindle box can drive the chuck to rotate. When the protective cover is in the avoidance position, the protective cover is separated from the travel switch. At this time, the travel switch is in the off state. If the controller of the main spindle box is started at this time, the main spindle box cannot drive the chuck to rotate either, so as to increase the safety of the lathe and further avoid the situation that the chuck may pose a safety hazard to the operator.

[0019] Optionally, the protective cover includes a cover body and a connecting piece sleeved on the support column, the protective cover has an action section protruding from the end of the connecting piece, the action section can contact and cooperate with the limit switch, and the bottom of the limit switch is provided with a mounting seat sleeved on the support column, and the mounting seat can move along the axial direction of the support column.

[0020] By adopting the above technical solution, after adjusting the distance between the protective cover and the spindle box, the mounting seat is adjusted, and then the mounting seat drives the limit switch to move, so as to ensure that the protective cover can apply pressure to the limit switch when it is in the protective position, and then ensure that when the protective cover is in the protective position, the spindle box can drive the chuck to rotate to ensure the normal operation of the lathe.

[0021] Optionally, the mounting seat is provided with a synchronization rod, and the synchronization rod is provided with a stop block that cooperates with the side of the connecting member away from the mounting seat to stop the travel switch, so that the travel switch can follow the connecting member to move in a direction away from the mounting seat.

[0022] By adopting the above technical solution, when the protective cover is adjusted away from the mounting seat, the connecting member moves along with the connecting member under the action of the stop block and the synchronization rod, and then the mounting seat drives the limit switch to move, so that the limit switch moves synchronously with the protective cover, thereby reducing the operator's workload when adjusting the protective cover, thereby improving the operator's user experience.

[0023] Optionally, the support column is provided with a limiting groove, and the mounting seat is provided with a positioning block slidably connected to the limiting groove to limit the relative rotation of the mounting seat and the support column.

[0024] By adopting the above technical solution, after the mounting seat is installed on the support column, the positioning block is located in the limit groove, so that the positioning block and the limit groove cooperate to limit the mounting seat, so as to avoid the mounting seat from rotating circumferentially around the support column, thereby increasing the stability of the mounting seat and ensuring that the protective cover can apply pressure to the travel switch when it is in the protective position.

[0025] Optionally, the protective cover has a transparent observation area.

[0026] By adopting the above technical solution, since the protective cover has a transparent observation area, the operator can observe the chuck and the workpiece through the observation area when the lathe is working, thereby increasing the flexibility of the protective device.

[0027] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0028] 1. The protective device in this application includes a protective cover, a limiting structure, and a support column provided on the headstock. The protective cover has a connection end sleeved outside the support column. The connection end can rotate around the support column so that the protective cover has a protective position covering the outside of the chuck and an avoidance position rotated to the side of the chuck, and the connection section can move along the axial direction of the support column. The limiting structure acts on the protective cover to limit the protective cover in the protective position. Since the protective cover in this application can move along the axial direction of the support column, the distance between the protective cover and the headstock can be adjusted, so that the protective device in this application can be applied to chucks of various different models, thereby increasing the flexibility of the protective device.

[0029] 2. The protective cover in this application includes a cover body and a connecting member provided at the end of the cover body. The connecting member has a receiving space for receiving the support column. The limiting structure includes a limiting block provided on the inner wall of the receiving space and a limiting groove provided on the support column. When the protective cover is in the protective position, the limiting block and the groove wall of the limiting groove are in a blocking fit to realize the limitation of the protective cover. Since the limiting groove has two groove walls in the circumferential direction of the support column, when the limiting block and the inner groove wall of the limiting groove are in a blocking fit, the protective cover is limited in the protective position, and when the limiting block and the outer groove wall of the limiting groove are in a blocking fit, the protective cover is limited in the avoidance position to increase the stability of the protective cover. In addition, since the protective device in this application can limit the avoidance position of the protective cover, the protective cover can be relatively closer to the top of the headstock when in the avoidance position, so that the operator can drive the protective cover to the protective position, thereby improving the operator's use experience.

[0030] 3. The connecting member in this application includes a first connecting portion and a second connecting portion detachably connected to the first connecting portion. The first connecting portion and the second connecting portion together form the receiving space. The limiting block is provided on one of the first connecting portion and the second connecting portion, thereby reducing the production difficulty of the connecting member, improving the production efficiency of the connecting member, and at the same time reducing the production cost of the protective device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of this application and form a part of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0032] Figure 1 is a schematic structural diagram of the protective device under an embodiment of this application, mainly showing the state when the protective cover is in the protective position;

[0033] Figure 2 is Figure 1 an enlarged view of part A in

[0034] Figure 3This is a schematic structural diagram of the protective device according to one embodiment of the present application, mainly showing the state of the protective cover in the avoidance position;

[0035] Figure 4 This is a schematic structural diagram of the protective device according to one embodiment of the present application from another perspective;

[0036] Figure 5 This is a schematic structural diagram of the mounting base according to one embodiment of the present application;

[0037] Figure 6 This is a cross-sectional view of the support column according to one embodiment of the present application.

[0038] 1. Protective cover; 11. Cover body; 12. Connecting piece; 121. First connecting part; 122. Second connecting part; 123. Extension piece; 2. Limiting structure; 21. Limiting block; 22. Limiting groove; 3. Support column; 31. Fixed tube; 311. Fixed block; 4. Spindle box; 41. Chuck; 5. Travel switch; 51. Mounting seat; 511. Positioning block; 512. Synchronizing rod; 513. Stop block. DETAILED DESCRIPTION

[0039] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0040] The following description sets forth many specific details to facilitate a thorough understanding of the present application. However, the present application may also be implemented in other ways than those described herein, and therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features of each embodiment may be combined with each other unless there is a conflict.

[0041] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0042] In this application, unless otherwise clearly specified or limited, terms such as "install", "connect", "couple", "fix", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0044] Refer to Figures 1 to 6 , a protective device for a lathe is disclosed, which includes a protective cover 1, a limiting structure 2, and a support column 3 provided on the headstock 4. The protective cover 1 has a connection end sleeved outside the support column 3, and the connection end can rotate around the support column 3 so that the protective cover 1 has a protective position covering the outside of the chuck 41 and an avoidance position rotated to the side of the chuck 41, and the connection end can move along the axial direction of the support column 3. The limiting structure 2 acts on the protective cover 1 to limit the protective cover 1 in the protective position.

[0045] It can be understood that the cross-sectional shape of the support column 3 is circular, the headstock 4 has an installation surface vertically arranged and close to the chuck 41, and the support column 3 is provided on the installation surface and is perpendicular to the installation surface.

[0046] When using the protection device in this application, first install the support column 3 on the headstock 4 of the lathe, then sleeved the connection section of the protective cover 1 on the support column 3, and then adjust the protective cover 1 so that the connection end moves along the axial direction of the support column 3, so that the protective cover 1 faces the chuck 41 on the headstock 4, that is, the protective cover 1 can cover the outside of the chuck 41. When installing the workpiece, first rotate the protective cover 1 so that the connection end rotates relative to the support column 3, and then make the protective cover 1 rotate from the protection position to the avoidance position. Then install the workpiece on the chuck 41, and then rotate the protective cover 1 in the reverse direction so that the protective cover 1 rotates from the avoidance position to the protection position. At this time, the limiting structure 2 limits the protective cover 1 so that the protective cover 1 stays stably in the protection position, and further makes the protective cover 1 protect the high-speed rotating chuck 41 to avoid harm to the operator.

[0047] Since the protective cover 1 in this application can move along the axial direction of the support column 3, the distance between the protective cover 1 and the headstock 4 can be adjusted, so that the protection device in this application can be applied to various types of chucks 41, thereby increasing the flexibility of the protection device.

[0048] This application does not specifically limit the way of installing the support column 3 on the headstock 4. Preferably, referring to Figure 4 , a fixed pipe 31 is provided at the end of the support column 3, and a fixed block 311 is provided on the fixed pipe 31. The fixed block 311 is fixedly connected to the headstock 4 to reduce the connection difficulty between the support column 3 and the headstock 4, and further achieve the effect of facilitating the installation of the protection device on the headstock 4. In other embodiments, the support column 3 can also be directly fixedly connected to the headstock 4.

[0049] This application does not specifically limit the structure of the limiting structure 2. Preferably, referring to Figure 1 , Figure 2 and Figure 4 , the protective cover 1 includes a cover body 11 and a connecting member 12 provided at the end of the cover body 11. The connecting member 12 has a receiving space for receiving the support column 3. The limiting structure 2 includes a limiting block 21 provided on the inner wall of the receiving space and a limiting groove 22 provided on the support column 3. When the protective cover 1 is in the protection position, the limiting block 21 is in a stop fit with the groove wall of the limiting groove 22.

[0050] When the protective cover 1 is rotated, the cover body 11 drives the connecting member 12 to rotate, and the connecting member 12 drives the limiting block 21 to rotate, thereby causing the limiting block 21 and the limiting groove 22 to rotate relative to each other. When the limiting block 21 contacts the groove wall of the limiting groove 22, the protective cover 1 cannot continue to rotate, thereby limiting the position of the protective cover 1. Since the limiting groove 22 has two groove walls in the circumferential direction of the support column 3, when the limiting block 21 cooperates with the groove wall stop on the inner side of the limiting groove 22, the protective cover 1 is limited to the protection position. When the limiting block 21 cooperates with the groove wall stop on the outer side of the limiting groove 22, the protective cover 1 is limited to the avoidance position, thereby increasing the stability of the protective cover 1. In addition, since the protective device in the present application can limit the avoidance position of the protective cover 1, the protective cover 1 can be closer to the top of the spindle box 4 when in the avoidance position, so that the operator can drive the protective cover 1 to the protection position, thereby improving the operator's user experience.

[0051] At the same time, arranging the limiting structure 2 inside the connecting part 12 can also reduce the number of assembly parts required when installing the protective device to the lathe, thereby improving the assembly efficiency of the protective device and avoiding the situation where too many parts connected to the spindle box 4 affect the installation of the workpiece.

[0052] Preferably, the angle of the entire circumference of the support column 3 by the limiting groove 22 is greater than 90 degrees and less than 120 degrees, so as to ensure the opening angle of the protective cover 1 and ensure that the protective cover 1 is in a relatively high position when in the avoidance position.

[0053] The present application does not make any specific limitation on the structure of the connector 12. Preferably, refer to Figure 1 and Figure 2 The connecting member 12 includes a first connecting portion 121 and a second connecting portion 122 detachably connected to the first connecting portion 121. The first connecting portion 121 and the second connecting portion 122 together form an accommodating space. The limit block 21 is provided at one of the first connecting portion 121 and the second connecting portion 122, thereby reducing the production difficulty of the connecting member 12, improving the production efficiency of the connecting member 12, and reducing the production cost of the protective device.

[0054] The present application does not specifically limit the manner in which the first connection portion 121 and the second connection portion 122 are detachably connected. Preferably, the first connection portion 121 and the second connection portion 122 are detachably connected via a bolt pair to increase the connection stability between the first connection portion 121 and the second connection portion 122, thereby increasing the connection stability between the connector 12 and the support column 3. In other embodiments, the first connection portion 121 and the second connection portion 122 may also be detachably connected via screws or a snap-fit structure.

[0055] Further, refer to Figure 1 、 Figure 2 andFigure 4 Both the first connecting part 121 and the second connecting part 122 are provided with extension pieces 123 which extend. The two extension pieces 123 are respectively located on both sides of the cover body 11 to squeeze and fix the cover body 11.

[0056] When assembling the protective cover 1, first place the first connecting part 121 and the second connecting part 122 on both sides of the cover body 11 respectively, so that the two extension pieces 123 are respectively located on both sides of the cover body 11, and then fixedly connect the first connecting part 121 and the second connecting part 122 together. At this time, the two extension pieces 123 exert a squeezing force on the cover body 11, so that the cover body 11 is fixedly connected to the two extension pieces 123 under the action of the squeezing force, so as to achieve the effect of facilitating the assembly of the protective cover 1, and at the same time, it can also achieve the effect of facilitating the replacement of the cover body 11. In addition, the extension piece 123 can also support the cover body 11 to increase the connection stability between the cover body 11 and the connecting piece 12.

[0057] Furthermore, the connecting piece 12 is provided with a fastener that passes through the two extension pieces 123 and the cover body 11. The cover body 11 is installed between the connecting pieces 12, and then the fastener is installed on the extension piece 123 so that the fastener passes through the two extension pieces 123 and the cover body 11 to further increase the connection stability between the cover body 11 and the connecting piece 12.

[0058] This application does not specifically limit the structure of the fastener. Preferably, the fastener is a screw to achieve the effect of facilitating the fastener to pass through the two extension pieces 123 and the cover body 11. In other implementation examples, the fastener can also be a bolt pair.

[0059] In other embodiments, the connecting piece 12 can also be a tubular structure sleeved outside the support column 3. <(

[0060] In other implementation manners, the limiting structure 2 can also be a block structure provided on the main spindle box 4, and the block structure is arranged opposite to the support column 3, so that when the protective cover 1 is in the protective position, it can abut against the block structure, so that the block structure supports and limits the protective cover 1.

[0061] In a preferred implementation manner, referring to Figure 4 、 Figure 5 and Figure 6 , the protection device further includes a travel switch 5 provided on the support column 3. The travel switch 5 is connected in series with the controller of the main spindle box 4. When the protective cover 1 is in the protective position, the protective cover 1 presses the travel switch 5 to make the travel switch 5 conduct. When the protective cover 1 is in the avoidance position, the protective cover 1 is separated from the travel switch 5 to make the travel switch 5 turn off.

[0062] After driving the protective cover 1 to the protective position, the protective cover 1 presses on the travel switch 5, thereby turning on the travel switch 5. At this time, the controller of the headstock 4 is started, and the headstock 4 can drive the chuck 41 to rotate. When the protective cover 1 is in the avoidance position, the protective cover 1 is separated from the travel switch 5. At this time, the travel switch 5 is in the off state. If the controller of the headstock 4 is started at this time, the headstock 4 cannot drive the chuck 41 to rotate either, so as to increase the safety of the lathe and further avoid the situation where the chuck 41 may pose a safety hazard to the operator.

[0063] Furthermore, referring to Figure 4 , the protective cover 1 includes a cover body 11 and a connecting member 12 sleeved on the support column 3. The protective cover 1 has an acting section protruding from the end of the connecting member 12, and the acting section can be in contact and cooperation with the travel switch 5. A mounting seat 51 sleeved on the support column 3 is provided at the bottom of the travel switch 5, and the mounting seat 51 can move along the axial direction of the support column 3.

[0064] After adjusting the distance between the protective cover 1 and the headstock 4, the mounting seat 51 is adjusted, and then the mounting seat 51 drives the travel switch 5 to move, so as to ensure that the protective cover 1 can press on the travel switch 5 when it is in the protective position, and further ensure that when the protective cover 1 is in the protective position, the headstock 4 can drive the chuck 41 to rotate to ensure the normal operation of the lathe.

[0065] Furthermore, referring to Figure 1 and Figure 5 , the mounting seat 51 is provided with a synchronous rod 512, and the synchronous rod 512 is provided with a stop block 513 that is in stop cooperation with the side of the connecting member 12 facing away from the mounting seat 51, so that the travel switch 5 can move in the direction away from the mounting seat 51 following the connecting member 12.

[0066] When adjusting the protective cover 1 in the direction away from the mounting seat 51, the connecting member 12 moves following the connecting member 12 under the action of the stop block 513 and the synchronous rod 512, and then the mounting seat 51 drives the travel switch 5 to move, so as to realize the synchronous movement of the travel switch 5 following the protective cover 1, reduce the workload of the operator when adjusting the protective cover 1, and further improve the use experience of the operator.

[0067] Even further, referring to Figure 6 , the support column 3 is provided with a limit groove 22, and the mounting seat 51 is provided with a positioning block 511 slidably connected to the limit groove 22 to limit the relative rotation between the mounting seat 51 and the support column 3.

[0068] After the mounting base 51 is installed on the support column 3, the positioning block 511 is located in the limiting groove 22, so that the cooperation between the positioning block 511 and the limiting groove 22 realizes the limitation of the mounting base 51, avoiding the circumferential rotation of the mounting base 51 around the support column 3, thereby increasing the stability of the mounting base 51, and further ensuring that the protective cover 1 can press on the travel switch 5 when in the protective position.

[0069] In a preferred embodiment, the protective cover 1 has a transparent observation area, so that when the lathe is working, the operator can observe the chuck 41 and the workpiece through the observation area, thereby increasing the flexibility of the protection device.

[0070] This application does not specifically limit the formation method of the observation area. Preferably, the cover body 11 of the protective cover 1 is made of plexiglass, so that the entire cover body 11 is transparent. That is to say, the overall cover body 11 is the observation area, so as to further achieve the effect of facilitating the operator's observation. In other embodiments, the cover body 11 of the protective cover 1 is made of metal material, and the protective cover 1 is provided with a notch, and plexiglass is provided at the notch to form the observation area.

[0071] What is not described in this application can be realized by adopting or referring to the existing technology.

[0072] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the key points of each embodiment are the differences from other embodiments.

[0073] The above are only the embodiments of this application and are not used to limit this application. For those skilled in the art, this application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims

1. A protective device for a lathe, characterized in that, It includes a protective cover (1), a limiting structure (2), and a support column (3) provided on the spindle box (4). The protective cover (1) has a connection end sleeved outside the support column (3), and the connection end can rotate around the support column (3) so that the protective cover (1) has a protective position covering the outside of the chuck (41) and an avoidance position rotated to the side of the chuck (41), and the connection end can move along the axial direction of the support column (3). The limiting structure (2) acts on the protective cover (1) to limit the protective cover (1) at the protective position.

2. The protective device for a lathe according to claim 1, characterized in that, The protective cover (1) includes a cover body (11) and a connecting member (12) provided at the end of the cover body (11). The connecting member (12) has a receiving space for receiving the support column (3). The limiting structure (2) includes a limiting block (21) provided on the inner wall of the receiving space and a limiting groove (22) provided on the support column (3). When the protective cover (1) is in the protective position, the limiting block (21) is in stop cooperation with the groove wall of the limiting groove (22).

3. The protective device for a lathe according to claim 2, characterized in that, The connecting member (12) includes a first connecting portion (121) and a second connecting portion (122) detachably connected to the first connecting portion (121). The first connecting portion (121) and the second connecting portion (122) together form the receiving space, and the limiting block (21) is provided on one of the first connecting portion (121) and the second connecting portion (122).

4. The protective device for a lathe according to claim 3, characterized in that, The first connecting portion (121) and the second connecting portion (122) are both provided with extending pieces (123). The two extending pieces (123) are respectively located on both sides of the cover body (11) to squeeze and fix the cover body (11).

5. The protective device for a lathe according to claim 4, characterized in that, The connecting member (12) is provided with a fastening member passing through the two extending pieces (123) and the cover body (11).

6. The protective device for a lathe according to claim 1, characterized in that, It further includes a travel switch (5) provided on the support column (3). The travel switch (5) is connected in series with the controller of the spindle box (4). When the protective cover (1) is in the protective position, the protective cover (1) presses on the travel switch (5) to make the travel switch (5) conduct. When the protective cover (1) is in the avoidance position, the protective cover (1) is separated from the travel switch (5) to make the travel switch (5) turn off.

7. The protective device for a lathe according to claim 6, characterized in that, The protective cover (1) includes a cover body (11) and a connecting member (12) sleeved on the support column (3). The protective cover (1) has an acting section protruding from the end of the connecting member (12), and the acting section can be in contact and cooperation with the travel switch (5). A mounting seat (51) sleeved on the support column (3) is provided at the bottom of the travel switch (5), and the mounting seat (51) can move along the axial direction of the support column (3).

8. A protective device for a lathe according to claim 7, characterized in that, The mounting seat (51) is provided with a synchronization rod (512), and the synchronization rod (512) is provided with a stop block (513) that cooperates with a stop on the side of the connecting member (12) away from the mounting seat (51), so that the travel switch (5) can follow the connecting member (12) and move in a direction away from the mounting seat (51).

9. The protective device for a lathe according to claim 7, characterized in that, The support column (3) is provided with a limiting groove (22), and the mounting seat (51) is provided with a positioning block (511) slidably connected to the limiting groove (22) to limit the relative rotation of the mounting seat (51) and the support column (3).

10. A protective device for a lathe according to claim 1, characterized in that, The protective cover (1) has a transparent observation area.

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