Telescopic protective cover and numerical control machine tool

Abstract

The application belongs to the technical field of spindle protection, and discloses a telescopic protective cover and a numerical control machine tool, wherein the telescopic protective cover comprises a movement joint fixedly connected to a spindle, an intermediate joint covered on the outside of the movement joint, a fixed joint covered on the outside of the intermediate joint, a hanging rail located above the fixed joint, and a hanging wheel set rollingly connected to the fixed joint; the intermediate joint can move along with the movement joint; the length of the fixed joint is smaller than the length of the intermediate joint, and the fixed joint is fixedly connected to a main machine; the hanging rail is arranged in parallel to the moving direction of the spindle; and the hanging wheel set is arranged on the top of the end of the intermediate joint far from the spindle and located on the side of the fixed joint away from the spindle, so that on the one hand, the rolling cooperation of the hanging wheel set and the hanging rail can realize the guidance of the movement of the intermediate joint, so as to ensure the machining precision of the numerical control machine tool on a workpiece; and on the other hand, the cooperation of the hanging wheel set and the hanging rail can realize the suspension of the end of the intermediate joint far from the spindle, so as to ensure the service life of the telescopic protective cover.

Description

Technical Field

[0001] This application belongs to the technical field of spindle protection, specifically relating to a telescopic protective cover and a CNC machine tool. Background Technology

[0002] CNC machine tools are short for numerical control machine tools. They are automated machine tools equipped with a program control system. This control system can logically process programs with control codes or other symbolic instructions, decode them, represent them with coded numbers, and input them into the CNC device through an information carrier. After processing, the CNC device sends out various control signals to control the machine tool's movements, so that the spindle automatically processes the parts according to the shape and size required by the drawings. In order to prevent foreign objects such as chips, coolant, and hard particles from entering key components such as guide rails and lead screws, a telescopic protective cover is usually installed between the spindle and the main machine to ensure the machining accuracy and operational stability of the machine tool.

[0003] Currently, telescopic protective covers generally consist of a moving section fixedly connected to the spindle, a fixed section fixedly connected to the main machine, and an intermediate section located between the moving and fixed sections. The intermediate section moves with the moving section. However, since the intermediate section relies on the moving and fixed sections for guidance during movement, and the guiding effect of the moving and fixed sections on the intermediate section is poor, the intermediate section is prone to skewness during movement. This skewness leads to increased stress between the intermediate section and the moving section, affecting the spindle's motion accuracy and consequently the CNC machine tool's machining accuracy. Furthermore, as the intermediate section moves with the moving section, it rubs against the main machine, causing wear and tear on the intermediate section, thus affecting the service life of the telescopic protective cover. Additionally, it can cause abnormal noise at the contact point between the intermediate section and the main machine during spindle movement, impacting the user experience. Utility Model Content

[0004] This application provides a telescopic protective cover to ensure the machining accuracy of CNC machine tools on workpieces and to ensure the service life of the telescopic protective cover, thereby avoiding abnormal noise caused by direct contact between the intermediate section and the main machine and improving the user experience.

[0005] The technical solution adopted in this application is as follows: A telescopic protective cover, comprising: The motion segment is fixedly connected to the main shaft; An intermediate section is provided outside the moving section, and the intermediate section is capable of moving with the moving section; A fixed section is provided, which is disposed outside the intermediate section, and the length of the fixed section is less than the length of the intermediate section. The fixed section is fixedly connected to the main unit. A suspension rail is located above the fixed section and is arranged parallel to the direction of movement of the main shaft; A roller assembly is located at the top of the intermediate section away from the main shaft and on the side of the fixed section opposite to the main shaft. The roller assembly is rotatably connected to the lifting rail.

[0006] By adopting the above technical solution, when the spindle of the CNC machine tool equipped with the telescopic protective cover of this application moves, the spindle drives the motion section to move, and the motion section drives the intermediate section to move. Since the hanger assembly is located at the top of the intermediate section away from the spindle and is fixedly connected to the hanger rail, when the intermediate section moves, the intermediate section will drive the hanger assembly to move, and the hanger assembly will roll relative to the hanger rail. This allows the rolling cooperation between the hanger assembly and the hanger rail to guide the movement of the intermediate section, thereby increasing the stability of the intermediate section during movement and preventing problems during the movement of the intermediate section. This design prevents the intermediate section from becoming misaligned, which increases stress between the intermediate section and the moving section and affects the spindle's motion accuracy. This ensures the CNC machine tool's machining accuracy. On the other hand, the combination of the hanging wheel assembly and the hanging rail allows for the suspension of the end of the intermediate section away from the spindle, preventing direct contact between the end of the intermediate section away from the spindle and the main machine, thus reducing wear on the intermediate section and ensuring the service life of the telescopic protective cover. It also prevents abnormal noise caused by friction between the intermediate section and the main machine, thereby improving the user experience.

[0007] Meanwhile, since the length of the fixed section is less than the length of the intermediate section, and the roller assembly is located on the side of the fixed section away from the main shaft, on the one hand, the movement range of the intermediate section can be guaranteed to ensure the protective effect of the telescopic protective cover on the CNC machine tool. On the other hand, compared with the existing technology where the length of the fixed section is greater than the length of the intermediate section, the amount of raw materials required for the production of the telescopic protective cover can be reduced, thereby reducing the production cost of the telescopic protective cover.

[0008] Optionally, the interior of the hanging rail has an accommodating space, the bottom of the hanging rail has a communicating groove communicating with the accommodating space and edges located on both sides of the communicating groove, the hanging wheel assembly includes a hanging wheel block located in the accommodating space, a first wheel body rotatably connected to the side of the hanging wheel block, a second wheel body rotatably connected to the bottom of the hanging wheel block, and a connecting member provided at the bottom of the hanging wheel block, the first wheel body is located in the accommodating space and is tumbledly connected to the edges, the second wheel body is located in the communicating groove and is tumbledly connected to the edges, and the connecting member is connected to the intermediate section.

[0009] By adopting the above technical solution, since the first wheel is rotatably connected to the side of the hanging wheel block, and the first wheel is located in the accommodating space and is rolled along the edge, the first wheel can be used to suspend the end of the intermediate section away from the main spindle, ensuring that the end of the intermediate section away from the main spindle cannot contact the main machine, thereby avoiding wear of the intermediate section and abnormal noise caused by friction between the intermediate section and the main machine. Furthermore, since the second wheel is rotatably connected to the bottom of the hanging wheel block, and the second wheel is located in the connecting groove and is rolled along the edge, the second wheel can be used to guide the movement of the intermediate section, so that the movement direction of the intermediate section is parallel to the movement direction of the main spindle, thereby avoiding the situation where the intermediate section deviates during movement and the stress between it and the moving section increases, thus ensuring the movement accuracy of the main spindle and ensuring the machining accuracy of the CNC machine tool on the workpiece.

[0010] Optionally, a connecting frame is provided at the top of the intermediate section, and a connecting plate is provided at the bottom of the connecting member. The connecting plate is provided with a fixing bolt pair passing through the connecting plate and the connecting frame. The bolt head and the nut of the fixing bolt pair are respectively located on opposite sides of the connecting plate and the connecting frame.

[0011] By adopting the above technical solution, since the top of the intermediate section is provided with a connecting frame and the bottom of the connecting piece is provided with a connecting plate, and the connecting plate is provided with a fixing bolt pair passing through the connecting plate and the connecting frame, the connection between the connecting piece and the intermediate section is realized on the one hand, so as to increase the connection stability between the connecting piece and the intermediate section and reduce the difficulty of connecting the connecting piece and the intermediate section together. On the other hand, the distance between the connecting plate and the connecting frame can be adjusted by adjusting the nut of the fixing bolt pair, so as to ensure that there is a gap between the bottom of the intermediate section away from the main shaft and the main machine, thereby ensuring the service life of the intermediate section and the service life of the telescopic protective cover.

[0012] Optionally, one of the connecting plate and the connecting frame is provided with an adjusting bolt pair, the nut of the adjusting bolt pair being located between the connecting plate and the connecting frame.

[0013] By adopting the above technical solution, since one of the connecting plate and the connecting frame is provided with an adjusting bolt pair, and the nut of the adjusting bolt pair is located between the connecting plate and the connecting frame, the bolt of the adjusting bolt pair can be adjusted so that the end of the bolt away from the bolt head abuts against the connecting plate or the connecting frame. The bolt and nut of the adjusting bolt pair support the connecting plate and the connecting frame, so that the distance between the connecting plate and the connecting frame remains constant, thereby avoiding relative movement between the connecting frame and the connecting plate in the vertical direction and increasing the stability of the intermediate section.

[0014] Optionally, the telescopic protective cover further includes a guide rail located below the intermediate section. The guide rail is arranged parallel to the moving direction of the main shaft. A guide wheel is rotatably connected to the end of the intermediate section away from the main shaft. The guide wheel is located on the side of the fixed section opposite to the main shaft, and the guide wheel is rolledly connected to the guide rail.

[0015] By adopting the above technical solution, since the guide rail is located below the intermediate section and is set parallel to the direction of movement of the main shaft, and the guide wheel is rolled and connected to the guide rail, on the one hand, the movement of the intermediate section can be guided by the cooperation of the guide wheel and the guide rail, so as to further increase the stability of the intermediate section during movement. On the other hand, the cooperation of the guide wheel and the guide rail can also help support the end of the intermediate section away from the main shaft, so as to reduce the force borne by the suspension rail, thereby increasing the stability of the suspension rail and reducing the structural strength required for the suspension rail, so as to reduce the production and manufacturing cost of the telescopic protective cover.

[0016] Optionally, the intermediate section is provided with a mounting block, the guide wheel is rotatably connected to the mounting block, and the guide wheel is located on the side of the intermediate section.

[0017] By adopting the above technical solution, since the guide wheel is rotatably connected to the mounting block, and the mounting block is located in the middle section, it can achieve the effect of facilitating the installation of the guide wheel, thereby facilitating the assembly of the telescopic protective cover. On the other hand, it can increase the stability of the guide wheel to ensure the guiding effect of the guide wheel on the middle section. Furthermore, since the guide wheel is located on the side of the middle section, it can reduce the gap between the middle section and the main machine, thereby ensuring the protective effect of the telescopic protective cover on the CNC machine tool.

[0018] Optionally, the telescopic protective cover further includes a first bracket and a second bracket, both of which are fixedly connected to the main unit, and both ends of the hanging rail are fixedly connected to the first bracket and the second bracket respectively, and the fixing section is fixedly connected to the first bracket.

[0019] By adopting the above technical solution, since both the first bracket and the second bracket are fixedly connected to the main unit, and both ends of the hanging rail are fixedly connected to the first bracket and the second bracket respectively, the first bracket and the second bracket can be used to support and fix the hanging rail, thereby increasing the stability of the hanging rail and facilitating its installation. Furthermore, since the fixed section is fixedly connected to the first bracket, the fixed section is fixedly connected to the main unit, which increases the flexibility of the first bracket and avoids the need to set other components to support the fixed section, thereby further reducing the production cost of the telescopic protective cover.

[0020] Optionally, the second bracket is provided with a limiting arm, and the end of the limiting arm near the main shaft is provided with a damping body that can cooperate with the intermediate section stop; And / or, the telescopic protective cover further includes a support rod, one bottom end of which is fixedly connected to the first bracket, and one top end of which is fixedly connected to the main unit.

[0021] By adopting the above technical solution, since the end of the limit arm near the spindle is equipped with a damper that can cooperate with the intermediate section stop, the movement range of the intermediate section can be limited by the damper and the limit arm to avoid the intermediate section moving too much and interfering with other parts of the CNC machine tool. At the same time, the damper can also buffer the intermediate section to avoid abnormal noise caused by the intermediate section colliding directly with the limit arm, thereby further improving the user experience.

[0022] Since the bottom end of the support rod is fixedly connected to the first bracket and the top end of the support rod is fixedly connected to the main unit, the top end of the first bracket can be fixed by the support rod to increase the stability of the first bracket, thereby increasing the stability of the fixed section and ensuring the stability of the first bracket in supporting and fixing the hanging rail.

[0023] Optionally, the telescopic protective cover further includes a support frame, which has a fixed end fixedly connected to the main shaft and a support end fixedly connected to the moving section, the support end being located at the end of the moving section away from the main shaft.

[0024] By adopting the above technical solution, since the support frame has a fixed end fixedly connected to the main shaft and a support end fixedly connected to the fixed section, and the support end is located at the end of the moving section away from the main shaft, the support frame can be used to support the end of the moving section away from the main shaft, thereby increasing the stability of the end of the moving section away from the main shaft. This prevents the end of the moving section away from the main shaft from sagging under its own weight, thus ensuring the support effect of the end of the moving section away from the main shaft on the intermediate section and ensuring the stability of the intermediate section.

[0025] This application also provides a CNC machine tool to ensure the machining accuracy of the workpiece and improve the user experience.

[0026] A CNC machine tool includes a main unit and a telescopic protective cover as described above.

[0027] By adopting the above technical solution, the CNC machine tool in this application uses the aforementioned telescopic protective cover, which allows the movement direction of the intermediate section to remain parallel to the movement direction of the spindle. This avoids the intermediate section from becoming misaligned during movement, thus preventing increased stress between the intermediate section and the moving section. This ensures the spindle's movement accuracy and guarantees the CNC machine tool's machining accuracy of the workpiece. Simultaneously, it prevents the end of the intermediate section furthest from the spindle from directly contacting the main machine, thus avoiding wear and abnormal noise. This further improves the user experience.

[0028] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The telescopic protective cover in this application includes a moving section fixedly connected to the main shaft, an intermediate section covering the outside of the moving section, a fixed section covering the outside of the intermediate section, a hanging rail located above the fixed section, and a roller assembly rollingly connected to the hanging rail. The intermediate section can move with the moving section. The length of the fixed section is less than the length of the intermediate section. The fixed section is fixedly connected to the main unit. The roller assembly is located at the top of the intermediate section away from the main shaft and on the side of the fixed section opposite to the main shaft. This allows the roller assembly and the hanging rail to roll together, guiding the movement of the intermediate section and increasing its stability during movement to prevent... This design prevents the intermediate section from becoming misaligned during movement, which could increase stress between the intermediate section and the moving section and affect the spindle's motion accuracy. This ensures the machining accuracy of the CNC machine tool. On the other hand, the combination of the hanger assembly and the hanger rail allows for the suspension of the end of the intermediate section away from the spindle, preventing direct contact and friction between the end of the intermediate section and the main machine. This reduces wear on the intermediate section, ensuring the service life of the telescopic protective cover. It also prevents abnormal noise caused by friction between the intermediate section and the main machine, thus improving the user experience.

[0029] 2. The lifting rail in this application has an internal accommodating space. The bottom of the lifting rail has a connecting groove communicating with the accommodating space and edges located on both sides of the connecting groove. The lifting wheel assembly includes a lifting wheel block located in the accommodating space, a first wheel body rotatably connected to the side of the lifting wheel block, a second wheel body rotatably connected to the bottom of the lifting wheel block, and a connecting member located at the bottom of the lifting wheel block. The first wheel body is located in the accommodating space and is rolled to the edge, thereby enabling the suspension of the end of the intermediate section away from the spindle by the cooperation of the first wheel body and the edge, so as to ensure that the end of the intermediate section away from the spindle cannot contact the main machine, thereby avoiding wear of the intermediate section and abnormal noise caused by friction between the intermediate section and the main machine. The second wheel body is located in the connecting groove and is rolled to the edge, thereby enabling the guidance of the movement of the intermediate section by the cooperation of the second wheel body and the edge, so that the movement direction of the intermediate section is parallel to the movement direction of the spindle, so as to avoid the situation where the intermediate section is deviated during the movement and the stress between it and the moving section increases, thereby ensuring the movement accuracy of the spindle and ensuring the machining accuracy of the workpiece by the CNC machine tool.

[0030] 3. In this application, a connecting frame is provided at the top of the intermediate section, and a connecting plate is provided at the bottom of the connecting component. The connecting plate is provided with a fixing bolt pair passing through the connecting plate and the connecting frame. The bolt head and the nut of the fixing bolt pair are located on opposite sides of the connecting plate and the connecting frame, respectively. This achieves the connection between the connecting component and the intermediate section, thereby increasing the connection stability between the connecting component and the intermediate section and reducing the difficulty of connecting the connecting component and the intermediate section together. On the other hand, the distance between the connecting plate and the connecting frame can be adjusted by adjusting the nut of the fixing bolt pair, so as to ensure that there is a gap between the bottom of the intermediate section away from the main shaft and the main machine, thereby ensuring the service life of the intermediate section and the service life of the telescopic protective cover. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of the telescopic protective cover according to one embodiment of this application, mainly showing the connection relationship between the moving joint and the main shaft; Figure 2 This is a partial structural diagram of the telescopic protective cover described in one embodiment of this application, mainly showing the positional relationship between the intermediate section, the moving section, and the fixed section when the main shaft moves to its limit position; Figure 3 This is a partial structural diagram of the telescopic protective cover described in one embodiment of this application, mainly showing the positional relationship between the hanging rail and the hanging wheel assembly and the intermediate section; Figure 4 for Figure 3Enlarged view of part A in the middle; Figure 5 for Figure 3 Enlarged view of part B in the middle; Figure 6 This is a schematic diagram of the structure of the second bracket in one embodiment of this application, mainly showing the positional relationship between the hanging rail and the limiting arm and the second bracket.

[0032] Figure label: 1. Movement section; 2. Intermediate section; 21. Guide wheel; 22. Mounting block; 3. Fixed section; 31. Connecting frame; 311. Adjusting bolt pair; 4. Hanging rail; 41. Accommodation space; 411. Connecting groove; 42. Edge; 5. Hanging wheel assembly; 51. Hanging wheel block; 52. First wheel body; 53. Second wheel body; 54. Connecting piece; 541. Connecting plate; 542. Fixing bolt pair; 6. Main shaft; 61. Support frame; 7. Guide rail; 8. First bracket; 81. Support rod; 9. Second bracket; 91. Limiting arm; 911. Damping body. Detailed Implementation

[0033] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0035] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction 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.

[0037] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0038] Reference Figures 1 to 6 A telescopic protective cover is disclosed, comprising a moving section 1, an intermediate section 2, a fixed section 3, a hanging rail 4, and a set of hanging wheels 5. The moving section 1 is fixedly connected to the main shaft 6. The intermediate section 2 is covered outside the moving section 1 and can move with the moving section 1. The fixed section 3 is covered outside the intermediate section 2, and the length of the fixed section 3 is less than the length of the intermediate section 2. The fixed section 3 is fixedly connected to the main unit. The hanging rail 4 is located above the fixed section 3 and is arranged parallel to the moving direction of the main shaft 6. The set of hanging wheels 5 is located at the top of the intermediate section 2 at the end away from the main shaft 6 and on the side of the fixed section 3 opposite to the main shaft 6. The set of hanging wheels 5 is rotatably connected to the hanging rail 4.

[0039] When the spindle 6 of the CNC machine tool equipped with the telescopic protective cover of this application moves, the spindle 6 drives the motion section 1 to move, and the motion section 1 drives the intermediate section 2 to move. Since the hanger assembly 5 is located at the top of the intermediate section 2 away from the spindle 6, and the hanger assembly 5 is fixedly connected to the hanger rail 4, when the intermediate section 2 moves, the intermediate section 2 will drive the hanger assembly 5 to move. The hanger assembly 5 will roll relative to the hanger rail 4. Thus, the rolling cooperation between the hanger assembly 5 and the hanger rail 4 can guide the movement of the intermediate section 2, thereby increasing the stability of the intermediate section 2 during movement and avoiding damage during the movement of the intermediate section 2. The skewness can increase the stress between the intermediate section 2 and the moving section 1, affecting the motion accuracy of the spindle 6. This ensures the machining accuracy of the CNC machine tool on the workpiece. On the other hand, the suspension of the intermediate section 2 away from the spindle 6 can be achieved by using the cooperation of the hanging wheel group 5 and the hanging rail 4. This avoids the intermediate section 2 away from the spindle 6 from directly contacting the main machine and causing friction between the two, thereby reducing the wear of the intermediate section 2 and ensuring the service life of the telescopic protective cover. At the same time, it also avoids abnormal noise caused by the friction between the intermediate section 2 and the main machine, thus improving the user experience.

[0040] Meanwhile, since the length of the fixed section 3 is less than the length of the intermediate section 2, and the roller assembly 5 is located on the side of the fixed section 3 away from the main shaft 6, on the one hand, the movement range of the intermediate section 2 can be guaranteed to ensure the protective effect of the telescopic protective cover on the CNC machine tool. On the other hand, compared with the existing technology where the length of the fixed section 3 is greater than the length of the intermediate section 2, the amount of raw materials required for the production of the telescopic protective cover can be reduced, thereby reducing the production cost of the telescopic protective cover.

[0041] This application does not specifically limit the manner in which the intermediate section 2 moves with the moving section 1. Preferably, the moving section 1 has a first flange at the end away from the main shaft 6, and the first flange is located on the outside of the moving section 1. The intermediate section 2 has a second flange at the end near the main shaft 6, and the second flange is located inside the intermediate section 2, on the side of the first flange near the main shaft 6. This allows the intermediate section 2 to move with the moving section 1 away from the fixed section 3 by utilizing the stop cooperation between the first flange and the second flange. The intermediate section 2 also has a stop at the end away from the main shaft 6, and the stop is located inside the intermediate section 2, on the side of the first flange away from the main shaft 6. This allows the intermediate section 2 to move with the moving section 1 towards the fixed section 3 by utilizing the stop cooperation between the first flange and the stop. In other embodiments, the intermediate section 2 can also move with the moving section 1 by using other structures.

[0042] This application does not specifically limit the support method of the middle section 2 near the main shaft 6. Preferably, the middle section 2 near the main shaft 6 rests on the moving section 1, so that the moving section 1 supports the middle section 2 near the main shaft 6, thereby reducing the manufacturing cost of the telescopic protective cover. In other embodiments, the middle section 2 near the main shaft 6 is located on the side of the fixed section 3 facing the main shaft 6, and the top of the middle section 2 near the main shaft 6 is also provided with a roller assembly 5 that is rolled to the hanging rail 4, so that the roller assembly 5 at the middle section 2 near the main shaft 6 cooperates with the hanging rail 4 to achieve suspension support for the middle section 2 near the main shaft 6.

[0043] This application does not specifically limit the structure of the hanging rail 4 and the hanging wheel assembly 5; preferably, refer to... Figure 3 and Figure 4The interior of the hanging rail 4 has a receiving space 41. The bottom of the hanging rail 4 has a connecting groove 411 communicating with the receiving space 41 and edges 42 located on both sides of the connecting groove 411. The hanging wheel assembly 5 includes a hanging wheel block 51 located in the receiving space 41, a first wheel body 52 rotatably connected to the side of the hanging wheel block 51, a second wheel body 53 rotatably connected to the bottom of the hanging wheel block 51, and a connecting member 54 located at the bottom of the hanging wheel block 51. The first wheel body 52 is located in the receiving space 41 and is tumbledly connected to the edge 42. The second wheel body 53 is located in the connecting groove 411 and is tumbledly connected to the edge 42. The connecting member 54 is connected to the intermediate section 2.

[0044] It is understandable that the hanging rail 4 has a C-shaped cross-section. Both sides of the hanging wheel block 51 are rotatably connected to the first wheel body 52. ​​The rotation axis of the first wheel body 52 extends horizontally. The rotation axis of the second wheel body 53 is perpendicular to the rotation axis of the first wheel body 52, and the rotation axis of the second wheel body 53 extends vertically.

[0045] Since the first wheel body 52 is rotatably connected to the side of the hanging wheel block 51, and the first wheel body 52 is located in the accommodating space 41 and is rolledly connected to the edge 42, the first wheel body 52 and the edge 42 can be used to suspend the end of the intermediate section 2 away from the main shaft 6, so as to ensure that the end of the intermediate section 2 away from the main shaft 6 cannot contact the main unit, thereby avoiding wear of the intermediate section 2 and abnormal noise caused by friction between the intermediate section 2 and the main unit.

[0046] Furthermore, since the second wheel body 53 is rotatably connected to the bottom of the hanging wheel block 51, and the second wheel body 53 is located in the connecting groove 411 and is rolledly connected to the edge 42, the cooperation between the second wheel body 53 and the edge 42 can guide the movement of the intermediate section 2, so that the movement direction of the intermediate section 2 is parallel to the movement direction of the main spindle 6, so as to avoid the situation that the intermediate section 2 is deviated during the movement and the stress between it and the moving section 1 increases, thereby ensuring the movement accuracy of the main spindle 6 and ensuring the machining accuracy of the CNC machine tool on the workpiece.

[0047] This application does not specify the number of second wheel bodies 53. Preferably, two second wheel bodies 53 are provided, with the two second wheel bodies 53 located on both sides of the connecting member 54, and the two second wheel bodies 53 are respectively provided along the two edges 42. Each second wheel body 53 is rolledly connected to its corresponding edge 42 to ensure the force balance of the hanging wheel assembly 5. In other embodiments, only one second wheel body 53 may be provided, and the second wheel body 53 may be arranged to avoid the connecting member 54, or the second wheel body 53 may be sleeved on the outside of the connecting member 54.

[0048] This application does not impose specific limitations on the structure of the connector 54. Preferably, the connector 54 is a plate-like structure to ensure the connection stability between the roller assembly 5 and the intermediate section 5. In other embodiments, the connector 54 may also be a rod-like structure.

[0049] This application does not specify the connection method between connector 54 and intermediate section 2. Preferably, refer to... Figure 3 and Figure 4 The top of the intermediate section 2 is provided with a connecting frame 31, and the bottom of the connecting piece 54 is provided with a connecting plate 541. The connecting plate 541 is provided with a fixing bolt pair 542 passing through the connecting plate 541 and the connecting frame 31. The bolt head of the fixing bolt pair 542 and the nut of the fixing bolt pair 542 are respectively located on opposite sides of the connecting plate 541 and the connecting frame 31.

[0050] It is understood that the connecting frame 31 is fixedly connected to the intermediate section 2, the connecting plate 541 is fixedly connected to the connecting piece 54, the fixing bolt pair 542 includes bolts and nuts threaded to the bolts, the connecting plate 541 and the connecting frame 31 are respectively provided with hole structures, and the bolts of the fixing bolt pair 542 pass through the hole structures of the connecting plate 541 and the connecting frame 31.

[0051] Because the top of the intermediate section 2 is provided with a connecting frame 31 and the bottom of the connecting piece 54 is provided with a connecting plate 541, and the connecting plate 541 is provided with a fixing bolt pair 542 passing through the connecting plate 541 and the connecting frame 31, the connection between the connecting piece 54 and the intermediate section 2 is realized on the one hand, so as to increase the connection stability between the connecting piece 54 and the intermediate section 2 and reduce the difficulty of connecting the connecting piece 54 and the intermediate section 2 together. On the other hand, the distance between the connecting plate 541 and the connecting frame 31 can be adjusted by adjusting the nut of the fixing bolt pair 542, so as to ensure that there is a gap between the bottom of the intermediate section 2 away from the main shaft 6 and the main machine, thereby ensuring the service life of the intermediate section 2 and the service life of the telescopic protective cover.

[0052] The better one is to refer to Figure 3 and Figure 4 The bolt head of the fixing bolt pair 542 is located on the side of the connecting frame 31 away from the connecting plate 541, and the nut of the fixing bolt pair 542 is located on the side of the connecting plate 541 away from the connecting frame 31, so as to facilitate the adjustment of the distance between the connecting frame 31 and the connecting plate 541.

[0053] Furthermore, refer to Figure 3 and Figure 4 One of the connecting plate 541 and the connecting frame 31 is provided with an adjusting bolt pair 311, and the nut of the adjusting bolt pair 311 is located between the connecting plate 541 and the connecting frame 31.

[0054] It is understood that the adjusting bolt assembly 311 includes a bolt and a nut threaded onto the bolt.

[0055] Since either the connecting plate 541 or the connecting frame 31 is provided with an adjusting bolt pair 311, and the nut of the adjusting bolt pair 311 is located between the connecting plate 541 and the connecting frame 31, the bolt of the adjusting bolt pair 311 can be adjusted so that the end of the bolt away from the bolt head abuts against the connecting plate 541 or the connecting frame 31. The bolt and nut of the adjusting bolt pair 311 support the connecting plate 541 and the connecting frame 31, so that the distance between the connecting plate 541 and the connecting frame 31 remains constant, thereby preventing the connecting frame 31 and the connecting plate 541 from moving relative to each other in the vertical direction, and thus increasing the stability of the intermediate section 2.

[0056] This application does not specify the installation method of the adjusting bolt pair 311. Preferably, refer to Figure 4 The connecting frame 31 is provided with a through hole, and the bolt of the adjusting bolt pair 311 passes through the through hole. The bolt head of the adjusting bolt pair 311 is located on the side of the connecting frame 31 away from the connecting plate 541. The nut of the adjusting bolt pair 311 abuts against the top of the connecting frame 31, and the end of the adjusting bolt pair 311 away from the bolt head abuts against the connecting plate 541. The nut of the adjusting bolt pair 311 supports the bolt, so that the end of the bolt away from the bolt head supports the connecting plate 541. In other implementation examples, the bolt head of the adjusting bolt pair 311 is also located between the connecting frame 31 and the connecting plate 541, so that the bolt is supported by the nut, thereby supporting the connecting plate 541; or, the connecting plate 541 is provided with a through hole, the bolt of the adjusting bolt pair 311 passes through the through hole, and the nut of the adjusting bolt pair 311 abuts against the connecting plate 541, and the end of the bolt away from the bolt head abuts against the bottom of the connecting frame 31, so that the connecting plate 541 can also be supported by the adjusting bolt pair 311.

[0057] In other embodiments, the design of connecting plate 541 and connecting frame 31 can be omitted, and the bottom end of connector 54 can be directly fixed to the top of intermediate section 2; or, the bottom end of connector 54 can be inserted through connecting frame 31, and a nut can be threaded onto the bottom end of connector 54, with the nut located on the side of connecting frame 31 away from connecting plate 541; or, two nuts can be threaded onto the bottom end of connector 54, with the two nuts located on the side of connecting frame 31 facing and away from connecting plate 541, respectively.

[0058] In other embodiments, the hanging rail 4 may also be a rod-shaped structure with a T-shaped cross section, so that spaces for accommodating rollers are formed on both opposite sides of the hanging rail 4. The roller assembly 5 includes a block structure with a C-shaped cross section and rollers rotatably connected to the block structure. Two rollers are provided and are respectively rotatably connected to the opposite sides of the hanging rail 4.

[0059] In a preferred embodiment, refer to Figure 1 , Figure 3 and Figure 5 The telescopic protective cover also includes a guide rail 7 located below the intermediate section 2. The guide rail 7 is arranged parallel to the moving direction of the main shaft 6. A guide wheel 21 is rotatably connected to the end of the intermediate section 2 away from the main shaft 6. The guide wheel 21 is located on the side of the fixed section 3 away from the main shaft 6, and the guide wheel 21 is rotatably connected to the guide rail 7.

[0060] It is understandable that the guide wheel 21 is located at the lower part of the intermediate section 2, and the guide rail 7 is fixedly connected to the main unit.

[0061] Since the guide rail 7 is located below the intermediate section 2 and is set parallel to the moving direction of the main shaft 6, the guide wheel 21 is rolledly connected to the guide rail 7. On the one hand, the cooperation between the guide wheel 21 and the guide rail 7 can guide the movement of the intermediate section 2, thereby increasing the stability of the intermediate section 2 during movement. On the other hand, the cooperation between the guide wheel 21 and the guide rail 7 can also assist in supporting the end of the intermediate section 2 away from the main shaft 6, thereby reducing the force borne by the hanging rail 4, thus increasing the stability of the hanging rail 4 and reducing the structural strength required for the hanging rail, thereby reducing the production cost of the telescopic protective cover.

[0062] Preferably, the outer circumferential surface of the guide wheel 21 is provided with an annular groove, and the guide rail 7 has a guide part that is adapted to the cross-sectional shape of the annular groove. The groove wall of the annular groove and the guide part roll in cooperation to ensure the guiding effect of the guide wheel 21 and the guide rail 7 on the intermediate section 2.

[0063] This application does not specify the installation method or position of the guide wheel 21. Preferably, refer to Figure 5 The intermediate section 2 is provided with a mounting block 22, and the guide wheel 21 is rotatably connected to the mounting block 22, and the guide wheel 21 is located on the side of the intermediate section 2.

[0064] It is understandable that the mounting block 22 is fixedly connected to the end of the intermediate section 2 away from the main shaft 6, and the rotation axis of the guide wheel 21 is set to extend horizontally.

[0065] Since the guide wheel 21 is rotatably connected to the mounting block 22, which is located on the intermediate section 2, it facilitates the installation of the guide wheel 21, thereby facilitating the assembly of the telescopic protective cover. It also increases the stability of the guide wheel 21, ensuring its guiding effect on the intermediate section 2. Furthermore, since the guide wheel 21 is located on the side of the intermediate section 2, it reduces the gap between the intermediate section 2 and the main machine, thus ensuring the protective effect of the telescopic protective cover on the CNC machine tool.

[0066] This application does not specify a particular method for fixing the mounting block 22 to the intermediate section 2. Preferably, the mounting block 22 is fixedly connected to the intermediate section 2 by bolts, so as to reduce the installation difficulty of the mounting block 22 while ensuring the stability of the connection between the mounting block 22 and the intermediate section 2. In other embodiments, the mounting block 22 can also be connected to the intermediate section 2 by welding or integral molding.

[0067] In other embodiments, the guide wheel 21 can also be rotatably connected to the bottom of the intermediate section 2 via a C-frame.

[0068] The installation method of the hanging rail 4 and the fixed section 3 in this application is not specifically limited. Preferred methods are as follows: Figure 1 The telescopic protective cover also includes a first bracket 8 and a second bracket 9. The first bracket 8 and the second bracket 9 are both fixedly connected to the main unit, and the two ends of the hanging rail 4 are respectively fixedly connected to the first bracket 8 and the second bracket 9. The fixed section 3 is fixedly connected to the first bracket 8.

[0069] It is understandable that the first bracket 8 and the second bracket 9 are spaced apart, the hanging rail 4 is fixedly connected to the main unit through the first bracket 8 and the second bracket 9, and the fixed section 3 is fixedly connected to the main unit through the first bracket 8.

[0070] Since both the first bracket 8 and the second bracket 9 are fixedly connected to the main unit, and both ends of the hanging rail 4 are fixedly connected to the first bracket 8 and the second bracket 9 respectively, the first bracket 8 and the second bracket 9 can be used to support and fix the hanging rail 4, thereby increasing the stability of the hanging rail 4 and facilitating its installation. Furthermore, since the fixed section 3 is fixedly connected to the first bracket 8, the fixed section 3 can be fixedly connected to the main unit. This increases the flexibility of the first bracket 8 and avoids the need to set up other components to support the fixed section 3, thereby further reducing the production cost of the telescopic protective cover.

[0071] This application does not specifically limit the structure of the first support 8 and the second support 9; preferably, refer to... Figure 3 and Figure 5Both the first support 8 and the second support 9 are L-shaped rod structures made of profiles. The bottom end of the first support 8 is fixedly connected to the main unit, and the hanging rail is fixedly connected to the top end of the first support 8. Similarly, the bottom end of the second support 9 is fixedly connected to the main unit, and the hanging rail is fixedly connected to the top end of the second support 9. This simplifies the structural design of the first and second supports 8 and 9 while ensuring effective support for the hanging rail 4, thereby reducing the manufacturing cost of the telescopic protective cover. In other embodiments, the first support 8 and the second support 9 can also be a gantry structure.

[0072] Furthermore, refer to Figure 1 and Figure 5 The second bracket 9 is provided with a limit arm 91, and the end of the limit arm 91 near the main shaft 6 is provided with a damping body 911 that can cooperate with the stop of the intermediate section 2.

[0073] Because the end of the limiting arm 91 near the spindle 6 is equipped with a damping body 911 that can cooperate with the stop of the intermediate section 2, the damping body 911 and the limiting arm 91 can limit the movement range of the intermediate section 2, so as to avoid the intermediate section 2 from interfering with other parts of the CNC machine tool due to excessive movement. At the same time, the damping body 911 can also buffer the intermediate section 2 to avoid abnormal noise caused by the intermediate section 2 directly colliding with the limiting arm 91, thereby further improving the user experience.

[0074] Preferably, the limiting arm 91 has an L-shaped arm structure, with one end of the limiting arm 91 fixedly connected to the second bracket 9, and the damping body 911 fixedly connected to the other end of the limiting arm 91.

[0075] This application does not specify the material for the damping body 911; it can be made of other elastic non-metallic materials such as nylon, rubber, and silicone.

[0076] Furthermore, refer to Figure 1 and Figure 3 The telescopic protective cover also includes a support rod 81. One bottom end of the support rod 81 is fixedly connected to the first bracket 8, and the top end of the support rod 81 is fixedly connected to the main unit. The support rod 81 can be used to fix the top end of the first bracket 8 to increase the stability of the first bracket 8, thereby increasing the stability of the fixed section 3 and ensuring the stability of the support and fixation of the first bracket 8 to the hanging rail 4.

[0077] In other embodiments, the hanging rail 4 can also be supported by other structures; the fixing section 3 can also be installed on the host by directly fixing one end of its bottom to the host.

[0078] In a preferred embodiment, refer to Figure 1 and Figure 3The telescopic protective cover also includes a support frame 61, which has a fixed end fixedly connected to the main shaft 6 and a support end fixedly connected to the moving section 1. The support end is located at the end of the moving section 1 away from the main shaft 6. The support frame 61 can then support the end of the moving section 1 away from the main shaft 6 to increase the stability of the end of the moving section 1 away from the main shaft 6, thereby preventing the end of the moving section 1 away from the main shaft 6 from drooping under its own weight. This ensures the support effect of the end of the moving section 1 away from the main shaft 6 on the intermediate section 2, thus ensuring the stability of the intermediate section 2.

[0079] This application does not specify the fixed connection method between the support end and the end of the motion section 1 away from the main shaft 6. It can refer to the connection method between the connecting frame 31 and the connecting plate 541, and can also use screws, welding, etc.

[0080] This application does not specifically limit the structure of the support frame 61. Preferably, the support frame 61 includes a frame body and a support rod fixedly connected to the frame body. One end of the frame body forms the fixed end of the support frame 61 and is fixedly connected to the main shaft 6. The support rod is located at the top of the end of the frame body away from the main shaft 6, and the support rod is arranged perpendicular to the frame body to increase the support area of ​​the support frame 61 for the moving section 1, thereby further increasing the stability of the end of the moving section 1 away from the main shaft 6. In other embodiments, the support frame 61 may also be composed of an inclined rod.

[0081] This application also discloses a CNC machine tool, which includes a main unit and a telescopic protective cover as described above.

[0082] It is understood that the main unit has a movable main shaft 6, the moving section 1 of the telescopic protective cover is fixedly connected to the main shaft 6, the fixed section 3 of the telescopic protective cover is fixedly connected to the main unit through the first bracket 8, the hanging rail 4 is fixedly connected to the main unit through the first bracket 8 and the second bracket 9, the guide rail 7 is fixedly connected to the main unit, and the intermediate section 2 is installed on the main unit through the hanging wheel group 5 and the guide wheel 21.

[0083] Because the CNC machine tool in this application uses the aforementioned telescopic protective cover, the moving direction of the intermediate section 2 can remain parallel to the moving direction of the spindle 6. This avoids the intermediate section 2 from becoming misaligned during movement, which would increase the stress between the intermediate section 2 and the moving section 1, thus ensuring the motion accuracy of the spindle 6 and guaranteeing the machining accuracy of the CNC machine tool on the workpiece. At the same time, it avoids the end of the intermediate section 2 furthest from the spindle 6 from directly contacting the main machine, which would cause wear and abnormal noise in the intermediate section 2, thereby improving the user experience.

[0084] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0085] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0086] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A telescopic protective cover, characterized in that, include: The motion section (1) is fixedly connected to the main shaft (6); Intermediate section (2), which covers the outside of the moving section (1), and the intermediate section (2) is able to move with the moving section (1); Fixed section (3), the fixed section (3) is covered outside the intermediate section (2), and the length of the fixed section (3) is less than the length of the intermediate section (2), and the fixed section (3) is fixedly connected to the host; The hanging rail (4) is located above the fixed section (3) and is arranged parallel to the moving direction of the main shaft (6); The roller assembly (5) is located at the top of the intermediate section (2) away from the main shaft (6) and on the side of the fixed section (3) away from the main shaft (6). The roller assembly (5) is tumbledly connected to the hanging rail (4).

2. A telescopic protective cover according to claim 1, characterized in that, The inside of the hanging rail (4) has a receiving space (41). The bottom of the hanging rail (4) has a connecting groove (411) communicating with the receiving space (41) and edges (42) located on both sides of the connecting groove (411). The hanging wheel assembly (5) includes a hanging wheel block (51) located in the receiving space (41), a first wheel body (52) rotatably connected to the side of the hanging wheel block (51), a second wheel body (53) rotatably connected to the bottom of the hanging wheel block (51), and a connector (54) provided at the bottom of the hanging wheel block (51). The first wheel body (52) is located in the receiving space (41) and is rotatably connected to the edge (42). The second wheel body (53) is located in the connecting groove (411) and is rotatably connected to the edge (42). The connector (54) is connected to the intermediate section (2).

3. A telescopic protective cover according to claim 2, characterized in that, The top of the intermediate section (2) is provided with a connecting frame (31), and the bottom of the connector (54) is provided with a connecting plate (541). The connecting plate (541) is provided with a fixing bolt pair (542) passing through the connecting plate (541) and the connecting frame (31). The bolt head of the fixing bolt pair (542) and the nut of the fixing bolt pair (542) are respectively located on opposite sides of the connecting plate (541) and the connecting frame (31).

4. A telescopic protective cover according to claim 3, characterized in that, One of the connecting plate (541) and the connecting frame (31) is provided with an adjusting bolt pair (311), and the nut of the adjusting bolt pair (311) is located between the connecting plate (541) and the connecting frame (31).

5. A telescopic protective cover according to any one of claims 1-4, characterized in that, The telescopic protective cover also includes a guide rail (7) located below the intermediate section (2). The guide rail (7) is arranged parallel to the moving direction of the main shaft (6). The end of the intermediate section (2) away from the main shaft (6) is rotatably connected to a guide wheel (21). The guide wheel (21) is located on the side of the fixed section (3) away from the main shaft (6), and the guide wheel (21) is rolled to the guide rail (7).

6. A telescopic protective cover according to claim 5, characterized in that, The intermediate section (2) is provided with a mounting block (22), the guide wheel (21) is rotatably connected to the mounting block (22), and the guide wheel (21) is located on the side of the intermediate section (2).

7. A telescopic protective cover according to any one of claims 1-4, characterized in that, The telescopic protective cover also includes a first bracket (8) and a second bracket (9). The first bracket (8) and the second bracket (9) are both fixedly connected to the host, and the two ends of the hanging rail (4) are respectively fixedly connected to the first bracket (8) and the second bracket (9). The fixing section (3) is fixedly connected to the first bracket (8).

8. A telescopic protective cover according to claim 7, characterized in that, The second bracket (9) is provided with a limiting arm (91), and the end of the limiting arm (91) near the main shaft (6) is provided with a damping body (911) that can cooperate with the stop of the intermediate section (2). And / or, the telescopic protective cover also includes a support rod (81), one bottom end of which is fixedly connected to the first bracket (8), and one top end of which is fixedly connected to the host.

9. A telescopic protective cover according to any one of claims 1-4, characterized in that, The telescopic protective cover also includes a support frame (61), which has a fixed end fixedly connected to the main shaft (6) and a support end fixedly connected to the motion segment (1). The support end is located at the end of the motion segment (1) away from the main shaft (6).

10. A CNC machine tool, characterized in that, Includes the main unit and the telescopic protective cover as described in any one of claims 1-9 above.

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