Guide sleeve structure and CNC drilling machine

Abstract

This application discloses a guide sleeve structure and a CNC drilling machine. The guide sleeve structure is applied to a CNC drilling machine and includes a first guide sleeve and a second guide sleeve. The first guide sleeve has a first mounting hole extending through it along its axial direction. The second guide sleeve is provided corresponding to the first mounting hole and is detachably connected to the first guide sleeve by a snap-fit ​​mechanism. The second guide sleeve has a guide hole extending through it along its axial direction for the drill gun of the CNC drilling machine to pass through.

Description

Technical Field

[0001] This application relates to the field of CNC drilling machine technology, and in particular to a guide sleeve structure and a CNC drilling machine. Background Technology

[0002] In the field of deep hole machining, the drill guns used by CNC drilling machines have a relatively large length-to-diameter ratio (that is, the ratio of the length dimension of the drill gun to the radial dimension of the drill gun). Therefore, when the drill gun of the CNC drilling machine is performing drilling operations, it is often necessary to use a guide sleeve to guide and position the drill gun, prevent the drill gun of the CNC drilling machine from deviating, and improve the machining accuracy of the CNC drilling machine.

[0003] When the drill bit of a CNC drilling machine is inserted into the guide hole of the guide sleeve, the gap between the drill bit and the guide hole wall is very small. This causes the drill bit to come into contact with the guide hole wall during high-speed rotation. Over time, this wears down the guide hole wall, increasing the gap between the drill bit and the guide hole. Consequently, the guide hole's guiding and positioning effect on the drill bit becomes poor or even fails. Furthermore, due to its inherent structural design, the guide sleeve in this technology often requires complete replacement, resulting in resource waste. Utility Model Content

[0004] This application provides a guide sleeve structure and a CNC drilling machine, which can solve the problem in the related art where the guide sleeve needs to be replaced as a whole due to wear of the guide hole wall surface caused by its own structural design, resulting in resource waste.

[0005] In a first aspect, embodiments of this application provide a guide sleeve structure; the guide sleeve structure is applied to a CNC drilling machine, the guide sleeve structure includes a first guide sleeve and a second guide sleeve, the first guide sleeve has a first mounting hole through it along its axial direction, the second guide sleeve is provided corresponding to the first mounting hole, the second guide sleeve is detachably connected to the first guide sleeve by a snap-fit ​​method, the second guide sleeve has a guide hole through it along its axial direction, the guide hole is used for the drill gun of the CNC drilling machine to pass through.

[0006] Secondly, embodiments of this application provide a CNC drilling machine; the CNC drilling machine includes the aforementioned guide sleeve structure.

[0007] Based on the guide sleeve structure and CNC drilling machine of this application embodiment, the second guide sleeve is designed to snap-fit ​​with the first guide sleeve to achieve the installation and disassembly of the second guide sleeve and the first guide sleeve. Thus, when the second guide sleeve is damaged due to long-term wear, the damaged second guide sleeve can be removed from the first guide sleeve, and a new second guide sleeve can be installed on the first guide sleeve, allowing for individual replacement of the damaged second guide sleeve. Compared to replacing the entire guide sleeve structure, this avoids wasting the resources of the first guide sleeve. Of course, when the first guide sleeve is damaged, it can also be removed from the second guide sleeve, and a new first guide sleeve can be installed on the second guide sleeve, allowing for individual replacement of the damaged first guide sleeve. Compared to replacing the entire guide sleeve structure, this also avoids wasting the resources of the second guide sleeve. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 This is a perspective view of the guide sleeve structure in one embodiment of this application;

[0010] Figure 2 for Figure 1 Exploded view of the guide sleeve structure in the middle;

[0011] Figure 3 This is a cross-sectional view of the guide sleeve structure after the second guide sleeve is assembled with the first guide sleeve in one embodiment of this application;

[0012] Figure 4 This is a cross-sectional view of the guide sleeve structure after the second guide sleeve is disassembled from the first guide sleeve in one embodiment of this application;

[0013] Figure 5 This is a cross-sectional view of the guide sleeve structure in which the drill gun of a CNC drilling machine in one embodiment of this application passes through the guide hole of the second guide sleeve;

[0014] Figure 6 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 1 ;

[0015] Figure 7 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 2 ;

[0016] Figure 8 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 3 ;

[0017] Figure 9 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 4 ;

[0018] Figure 10 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 5 ;

[0019] Figure 11 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 6 ;

[0020] Figure 12 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 7 ;

[0021] Figure 13 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 8 ;

[0022] Figure 14 This is a cross-section of the second guide sleeve and the first guide sleeve assembled together in one embodiment of this application. Figure 9 ;

[0023] Figure 15 for Figure 5 A cross-sectional view of the first guide sleeve of the guide sleeve structure in the CNC drilling machine when it is blocked by other structures of the CNC drilling machine;

[0024] Figure 16 This is a perspective view of the guide sleeve structure in another embodiment of this application;

[0025] Figure 17 for Figure 16 Exploded view of the guide sleeve structure in the middle;

[0026] Figure 18 This is a cross-sectional view of the guide sleeve structure after the second guide sleeve is assembled with the first guide sleeve in another embodiment of this application;

[0027] Figure 19 This is a cross-sectional view of the guide sleeve structure after the second guide sleeve is disassembled from the first guide sleeve in another embodiment of this application;

[0028] Figure 20 This is a cross-sectional view of the guide sleeve structure in another embodiment of the present application, in which the drill gun of the CNC drilling machine passes through the guide hole of the second guide sleeve.

[0029] Figure 21 A cross-section of the second guide sleeve in another embodiment of this application. Figure 1;

[0030] Figure 22 A cross-section of the second guide sleeve in another embodiment of this application. Figure 2 ;

[0031] Figure 23 A cross-section of the second guide sleeve in another embodiment of this application. Figure 3 ;

[0032] Figure 24 A cross-section of the second guide sleeve in another embodiment of this application. Figure 4 ;

[0033] Figure 25 A cross-section of the second guide sleeve in another embodiment of this application. Figure 5 ;

[0034] Figure 26 A cross-section of the second guide sleeve in another embodiment of this application. Figure 6 ;

[0035] Figure 27 A cross-section of the second guide sleeve in another embodiment of this application. Figure 7 .

[0036] Reference numerals: 1. Guide sleeve structure; 11. First guide sleeve; 11a. First mounting hole; 11b. Second mounting hole; 11c. Anti-slip hand grip; 12. Second guide sleeve; 12a. Guide hole; 121. Sleeve body; 1211. First part; 1212. Second part; 1213. Third part; 122. Insert; 13. Snap-fit ​​assembly; 131. First elastic retaining member; 131a. Glass ball rolling thread; 132. First locking groove; 2. Drill gun; 3. Workpiece to be processed; 3a. Surface to be processed; 4. Other structures; OO'. Axial direction. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] Please see Figures 1-5 In a first aspect, this application provides a guide sleeve structure 1, which is suitable for CNC drilling machines, and particularly suitable for vertical deep hole drilling machines. The guide sleeve structure 1 provided in this application is installed on the U-shaped guide sleeve fixed end of the CNC drilling machine. The guide sleeve structure 1 cooperates with the drill gun 2 of the CNC drilling machine so that the drill gun 2 of the CNC drilling machine can perform drilling operations on the surface 3a to be machined of the workpiece 3.

[0039] The following combination Figures 1-27The specific structure of guide sleeve structure 1 will be described in detail.

[0040] like Figures 1-5 As shown, the guide sleeve structure 1 includes a first guide sleeve 11 and a second guide sleeve 12.

[0041] The first guide sleeve 11 serves as the outer guide sleeve of the guide sleeve structure 1. The first guide sleeve 11 is connected to the fixed end of the U-shaped guide sleeve of the CNC drilling machine via a positioning ring. The positioning ring is used for fixed connection to the fixed end of the U-shaped guide sleeve of the CNC drilling machine. The specific connection method between the positioning ring and the fixed end of the U-shaped guide sleeve is not limited here; designers can design it reasonably according to actual needs. For example, the positioning ring can be detachably fixed to the fixed end of the U-shaped guide sleeve of the CNC drilling machine via at least one of the following methods: screw connection, snap-fit ​​connection, or plug-in connection. This facilitates the later replacement of positioning rings with different hole diameters or the repair of damaged positioning rings.

[0042] The first guide sleeve 11 can be detachably assembled to the positioning ring. For example, the outer circumferential surface of the first guide sleeve 11 is provided with a second locking groove, and the inner annular surface of the positioning ring is provided with a plurality of third mounting holes. Each third mounting hole of the positioning ring is provided with a second elastic retaining member. The end of each second elastic retaining member protrudes from the inner annular surface of the positioning ring. The second elastic retaining member has a certain elastic force. The end of the second elastic retaining member protruding from the inner annular surface of the positioning ring can undergo elastic displacement along the axial direction OO' of the third mounting hole. When the end of the second elastic retaining member is subjected to an external force less than the elastic force, the end of the second elastic retaining member moves outward from the third mounting hole and protrudes from the inner annular surface of the positioning ring and engages with the second locking groove on the outer circumferential surface of the first guide sleeve 11 to achieve the locking effect, thereby realizing the assembly between the first guide sleeve 11 and the positioning ring. When the end of the second elastic retaining member is subjected to an external force greater than the elastic force, the end of the second elastic retaining member moves towards the third mounting hole and disengages from the second locking groove on the outer circumferential surface of the first guide sleeve 11 to release the locking effect, thereby realizing the disassembly between the first guide sleeve 11 and the positioning ring. The second elastic retaining element can be a glass ball roller.

[0043] The first guide sleeve 11 has a first mounting hole 11a through it along its axial direction OO', and the first mounting hole 11a is used for the second guide sleeve 12 to pass through.

[0044] The second guide sleeve 12 is configured with mounting holes corresponding to those of the first guide sleeve 11. A guide hole 12a is formed through the second guide sleeve 12 along its axial direction OO'. The guide hole 12a allows the drill gun 2 of the CNC drilling machine to pass through. When the second guide sleeve 12 is assembled to the first guide sleeve 11, and the first guide sleeve 11 is assembled to the U-shaped guide sleeve fixed end of the CNC drilling machine via a positioning ring, the axis of the guide hole 12a, the central axis of the second guide sleeve 12, the central axis of the first guide sleeve 11, the central axis of the positioning ring, and the central axis of the CNC drilling machine spindle are all on the same straight line. The guide hole 12a can guide and position the drill gun 2 of the CNC drilling machine, preventing it from shifting during drilling operations and improving the machining accuracy of the CNC drilling machine. Meanwhile, because the length-to-diameter ratio (i.e., the ratio of the length dimension of the drill 2 to the radial dimension of the drill 2) of the CNC drilling machine is relatively large, the rigidity of this type of drill 2 is poor. By designing a second guide sleeve 12 to guide and position the drill 2, it is possible to prevent the drill 2 from bending, deforming or breaking during the drilling operation.

[0045] Understandably, after the first guide sleeve 11 is assembled to the fixed end of the U-shaped guide sleeve of the CNC drilling machine via the positioning ring, due to the large length-to-diameter ratio of the CNC drilling machine's drill lance 2 and the very small gap between the drill lance 2 and the guide hole 12a of the second guide sleeve 12, the drill lance 2 will come into contact with the guide hole 12a of the second guide sleeve 12 during high-speed rotation. Over time, this will cause wear on the guide hole 12a, increasing the gap between the drill lance 2 and the guide hole 12a of the second guide sleeve 12. This results in poor or even failed guiding and positioning effect of the guide hole 12a of the second guide sleeve 12 on the drill lance 2 (i.e., the second guide sleeve 12 is a consumable or easily damaged part). To avoid replacing the entire guide sleeve structure 1 due to damage to the second guide sleeve 12, thus wasting the resources of the first guide sleeve 11, the design is as follows: Figures 1-5 As shown, the second guide sleeve 12 is detachably connected to the first guide sleeve 11 via a snap-fit ​​mechanism. By designing the second guide sleeve 12 and the first guide sleeve 11 to engage, installation and removal of the second guide sleeve 12 and the first guide sleeve 11 are achieved. Thus, when the second guide sleeve 12 is damaged due to prolonged wear, the damaged second guide sleeve 12 can be removed from the first guide sleeve 11, and a new second guide sleeve 12 can be installed on the first guide sleeve 11, allowing for individual replacement of the damaged second guide sleeve 12. This avoids wasting the resources of the first guide sleeve 11 compared to replacing the entire guide sleeve structure 1. Of course, when the first guide sleeve 11 is damaged, it can also be removed from the second guide sleeve 12, and a new first guide sleeve 11 can be installed on the second guide sleeve 12, allowing for individual replacement of the damaged first guide sleeve 11. This also avoids wasting the resources of the second guide sleeve 12 compared to replacing the entire guide sleeve structure 1.

[0046] In the embodiments of this application, such as Figures 3-5 As shown, the guide sleeve structure 1 also includes a snap-fit ​​assembly 13. The snap-fit ​​assembly 13 includes a first elastic snap-fit ​​member 131 and a first snap-fit ​​groove 132. One of the first elastic snap-fit ​​member 131 and the first snap-fit ​​groove 132 is disposed on the first guide sleeve 11, and the other of the first elastic snap-fit ​​member 131 and the first snap-fit ​​groove 132 is disposed on the second guide sleeve 12. The first elastic snap-fit ​​member 131 and the first snap-fit ​​groove 132 are snap-fitted together to realize the installation between the second guide sleeve 12 and the first guide sleeve 11. Alternatively, the first elastic snap-fit ​​member 131 may be disposed on the first guide sleeve 11, and the first snap-fit ​​groove 132 may be disposed on the second guide sleeve 12; or the first snap-fit ​​groove 132 may be disposed on the first guide sleeve 11, and the first elastic snap-fit ​​member 131 may be disposed on the second guide sleeve 12. The first elastic retaining member 131 disengages from the first retaining groove 132, thereby enabling the disassembly of the second guide sleeve 12 and the first guide sleeve 11. At this time, the damaged second guide sleeve 12 or the damaged first guide sleeve 11 can be replaced as needed.

[0047] Specifically, the inner surface of the first guide sleeve 11 is provided with a plurality of second mounting holes 11b communicating with the first mounting hole 11a. The plurality of second mounting holes 11b extend radially along the first guide sleeve 11. The first elastic retaining member 131 includes a plurality of glass ball rollers 131a, each glass ball roller 131a being installed in one of the second mounting holes 11b. The first locking groove 132 is provided on the outer surface of the second guide sleeve 12, and the first locking groove 132 is arranged around the axial direction OO' of the second guide sleeve 12 (that is, the first locking groove 132 is an annular groove arranged around the axial direction OO' of the second guide sleeve 12). When the second guide sleeve 12 is assembled on the first guide sleeve 11, all the glass ball rollers 131a are engaged with the first locking groove 132. Each glass bead roller 131a has an end protruding from the inner side of the first guide sleeve 11. The glass bead roller 131a has a certain elastic force, and the end of the glass bead roller 131a protruding from the inner side of the first guide sleeve 11 can undergo elastic displacement along the axial direction OO' of the second mounting hole 11b. When the end of the glass bead roller 131a is subjected to an external force less than the elastic force, the end of the glass bead roller 131a moves outward from the second mounting hole 11b and protrudes from the inner side of the first guide sleeve 11, and forms a first locking groove 13 on the outer side of the second guide sleeve 12. 2. The snap-fit ​​mechanism is used to achieve the snap-fit ​​function, thereby enabling the assembly between the second guide sleeve 12 and the first guide sleeve 11. When the end of the glass ball screw 131a is subjected to an external force greater than the elastic force, the end of the glass ball screw 131a moves toward the second mounting hole 11b and disengages from the first locking groove 132 on the outer side of the second guide sleeve 12 to release the snap-fit ​​function. This allows the disassembly between the second guide sleeve 12 and the first guide sleeve 11. At this time, the damaged second guide sleeve 12 or the damaged first guide sleeve 11 can be replaced as needed.

[0048] Of course, in other embodiments, the first elastic retaining member 131 can also be an elastic retaining ring. The elastic retaining ring can be made of elastic materials such as rubber or silicone, but is not limited to. The elastic retaining ring can be fixed on the inner side of the first guide sleeve 11 by means of screws. At this time, the outer side of the second guide sleeve 12 is provided with the above-mentioned second slot. When the second guide sleeve 12 is assembled with the first guide sleeve 11, the elastic retaining ring is squeezed and elastically deformed to make an interference fit with the groove wall of the second retaining ring.

[0049] Understandably, during the movement of the guide sleeve structure 1 along the preset path following the U-shaped guide sleeve fixed end of the CNC drilling machine, if the first guide sleeve 11 is not obstructed by other structures 4 of the CNC drilling machine, the guide sleeve structure 1 will directly follow the movement of the U-shaped guide sleeve fixed end of the CNC drilling machine until the end face of the second guide sleeve 12 is in contact with the surface 3a to be machined of the workpiece 3. At this time, if... Figures 3-5 As shown, the second guide sleeve 12 includes a sleeve body 121, which includes a first portion 1211 and a second portion 1212 disposed along the axial direction OO' of the second guide sleeve 12. The first portion 1211 and the second portion 1212 are connected. When the second guide sleeve 12 is assembled onto the first guide sleeve 11, the first portion 1211 is located inside the first mounting hole 11a of the first guide sleeve 11, and the second portion 1212 is located outside the first mounting hole 11a of the first guide sleeve 11. Along the axial direction OO' of the second guide sleeve 12, the length of the first portion 1211 is greater than the length of the second portion 1212. Figures 3-5 As can be seen, the overall length of the second guide sleeve 12 is relatively small.

[0050] Considering the diverse structural forms of the drill lance 2 on CNC drilling machines, and the varying radial dimensions of different structural forms of the drill lance 2, in order to enhance... Figures 3-5 The applicability of the guide sleeve structure 1 shown is based on the detachable connection between the second guide sleeve 12 and the first guide sleeve 11. By changing the radial dimension of the first mounting hole 11a of the first guide sleeve 11 or changing the radial dimension of the guide hole 12a of the second guide sleeve 12, each first guide sleeve 11 can be assembled and fitted with multiple second guide sleeves 12 with different radial dimensions of the guide hole 12a. For example, as... Figure 6 As shown, Figure 6 A cross-sectional view showing the first guide sleeve 11 with a diameter of 16 mm in the first mounting hole 11a and the second guide sleeve 12 with a diameter of 4 mm in the guide hole 12a assembled together, as shown. Figure 7 As shown, Figure 7 A cross-sectional view showing a first guide sleeve 11 with a diameter of 16 mm in the first mounting hole 11a and a second guide sleeve 12 with a diameter of 6 mm in the guide hole 12a assembled together; as shown. Figure 8 As shown, Figure 8A cross-sectional view showing the first guide sleeve 11 with a diameter of 25 mm in the first mounting hole 11a and the second guide sleeve 12 with a diameter of 8 mm in the guide hole 12a assembled together, as shown. Figure 9 As shown, Figure 9 A cross-sectional view showing a first guide sleeve 11 with a diameter of 25 mm in the first mounting hole 11a and a second guide sleeve 12 with a diameter of 6 mm in the guide hole 12a assembled together; as shown. Figure 10 As shown, Figure 10 A cross-sectional view showing the assembly of a first guide sleeve 11 with a diameter of 32 mm in the first mounting hole 11a and a second guide sleeve 12 with a diameter of 8 mm in the guide hole 12a, as shown. Figure 11 As shown, Figure 11 A cross-sectional view showing a first guide sleeve 11 with a diameter of 32 mm in the first mounting hole 11a and a second guide sleeve 12 with a diameter of 6 mm in the guide hole 12a assembled together; as shown. Figure 12 As shown, Figure 12 A cross-sectional view showing the first guide sleeve 11 with a diameter of 42 mm in the first mounting hole 11a and the second guide sleeve 12 with a diameter of 8 mm in the guide hole 12a assembled together, as shown. Figure 13 As shown, Figure 13 This is a cross-sectional view showing a first guide sleeve 11 with a diameter of 42 mm in the first mounting hole 11a and a second guide sleeve 12 with a diameter of 6 mm in the guide hole 12a. It should be noted that... Figures 6 to 13 The hole diameter of the first mounting hole 11a and the hole diameter of the guide hole 12a shown in the figure are only examples and are not limited to the dimensions shown in the figure. Designers can make reasonable designs according to actual needs. The dimensions are marked only to make it clearer that the first guide sleeve 11 can be assembled and matched with the second guide sleeve 12 with guide holes 12a of different diameters.

[0051] Furthermore, such as Figure 14 As shown, the second guide sleeve 12 also includes an insert 122 embedded in the first part 1211 and the second part 1212. The hardness of the insert 122 is greater than that of the sleeve body 121. The guide hole 12a passes through the first part 1211, the second part 1212, and the insert 122 along the axial direction OO' of the second guide sleeve 12. By designing the insert 122 to be made of a material with relatively high hardness, the wear of the CNC drilling gun 2 on the guide hole 12a can be reduced, thereby extending the overall service life of the second guide sleeve 12. By designing the sleeve body 121 to be made of a material with relatively low hardness, the production cost of the guide sleeve structure 1 can be reduced. For example, the material of the sleeve body 121 can be bearing steel, and the material of the insert 122 can be tungsten steel. It should also be noted that the material of the first guide sleeve 11 and the material of the sleeve body 121 can be the same or different.

[0052] It is understandable that, during the movement of the guide sleeve structure 1 along the preset path following the U-shaped guide sleeve fixed end of the CNC drilling machine, if the first guide sleeve 11 is blocked by other structures 4 of the CNC drilling machine, and if the following is still selected... Figure 15 The guide sleeve structure 1 shown does not directly follow the movement of the U-shaped guide sleeve fixed end of the CNC drilling machine to bring the end face of the second guide sleeve 12 into contact with the surface 3a of the workpiece 3 to be machined. That is, at this point, there is a large gap between the end face of the second guide sleeve 12 and the surface 3a of the workpiece 3 to be machined, which will affect the drilling accuracy. To solve this problem, a design is made as follows... Figures 16-20 As shown, the second guide sleeve 12 includes a sleeve body 121, which comprises a first portion 1211, a second portion 1212, and a third portion 1213 connected sequentially along the axial direction OO' of the second guide sleeve 12. When the second guide sleeve 12 is assembled onto the first guide sleeve 11, the first portion 1211 is located within the first mounting hole 11a of the first guide sleeve 11, and the second portion 1212 is located outside the first mounting hole 11a of the first guide sleeve 11. Along the axial direction OO' of the second guide sleeve 12, the length of the first portion 1211 is greater than the length of the second portion 1212, and the length of the first portion 1211 is less than the length of the third portion 1213. Figures 18-20 As can be seen, the overall length of the second guide sleeve 12 is relatively large.

[0053] Considering the diverse structural forms of the drill lance 2 on CNC drilling machines, and the varying radial dimensions of different structural forms of the drill lance 2, in order to enhance... Figures 18-20 The applicability of the guide sleeve structure 1 shown is based on the detachable connection between the second guide sleeve 12 and the first guide sleeve 11. By changing the radial dimension of the first mounting hole 11a of the first guide sleeve 11 or changing the radial dimension of the guide hole 12a of the second guide sleeve 12, each first guide sleeve 11 can be assembled and fitted with multiple second guide sleeves 12 with different radial dimensions of the guide hole 12a. For example, as... Figure 21 As shown, Figure 21 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 6 mm, is shown below. Figure 22 As shown, Figure 22 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 8 mm, is shown below. Figure 23 As shown, Figure 23 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 10 mm, is shown below. Figure 24 As shown, Figure 24 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 11 mm, is shown below. Figure 25 As shown, Figure 25 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 12 mm, is shown below. Figure 26 As shown, Figure 26 A cross-sectional view of the second guide sleeve 12, with a guide hole 12a having a diameter of 14 mm, is shown below. Figure 27 As shown, Figure 27 This is a cross-sectional view of the second guide sleeve 12, whose guide hole 12a has a diameter of 16 mm. It should be noted that... Figures 21 to 27 The aperture size of the guide hole 12a shown in the figure is only an example and is not limited to the size shown in the figure. Designers can make reasonable designs according to actual needs. The size is marked only to make it clearer that the first guide sleeve 11 can be assembled and matched with the second guide sleeve 12 with guide holes 12a of different aperture sizes.

[0054] Furthermore, such as Figures 21-27 As shown, the second guide sleeve 12 also includes an insert 122 embedded in the third part 1213. The hardness of the insert 122 is greater than that of the sleeve body 121. The guide hole 12a passes through the first part 1211, the second part 1212, the third part 1213, and the insert 122 along the axial direction OO' of the second guide sleeve 12. By designing the insert 122 to be made of a material with relatively high hardness, the wear of the CNC drilling gun 2 on the guide hole 12a can be reduced, thereby extending the overall service life of the second guide sleeve 12. By designing the sleeve body 121 to be made of a material with relatively low hardness, the production cost of the guide sleeve structure 1 can be reduced. For example, the material of the sleeve body 121 can be bearing steel, and the material of the insert 122 can be tungsten steel. It should also be noted that the material of the first guide sleeve 11 can be the same as or different from the material of the sleeve body 121.

[0055] In the embodiments of this application, such as Figure 3 and Figure 18 As shown, the outer peripheral surface of the first guide sleeve 11 is provided with an anti-slip grip portion 11c. By designing the anti-slip grip portion 11c, the second guide sleeve 12 and the first guide sleeve 11 can be installed and disassembled using the anti-slip grip portion 11c, which improves the ease of installation and disassembly of the second guide sleeve 12 and the first guide sleeve 11. Specifically, the anti-slip grip portion 11c consists of recesses and / or raised textures arranged around the axis of the first guide sleeve 11, with a simple structure and easy processing.

[0056] Secondly, embodiments of this application provide a CNC drilling machine, which includes the aforementioned guide sleeve structure 1. Based on the CNC drilling machine in this application embodiment, by designing a split first guide sleeve 11 and a second guide sleeve 12, the first guide sleeve 11 and the second guide sleeve 12 are detachably connected, and the damaged first guide sleeve 11 or the damaged second guide sleeve 12 can be replaced individually as needed, avoiding resource waste.

[0057] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0058] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A guide sleeve structure, characterized in that, Applied to CNC drilling machines, including: A first guide sleeve, wherein a first mounting hole is provided through the first guide sleeve along its axial direction; The second guide sleeve is provided corresponding to the first mounting hole. The second guide sleeve is detachably connected to the first guide sleeve by a snap-fit ​​method. The second guide sleeve has a guide hole through it along its axial direction. The guide hole is used for the drill gun of the CNC drilling machine to pass through.

2. The guide sleeve structure as described in claim 1, characterized in that, The guide sleeve structure further includes a snap-fit ​​assembly, which includes a first elastic snap-fit ​​member and a first snap-fit ​​groove. One of the first elastic snap-fit ​​member and the first snap-fit ​​groove is disposed in the first guide sleeve, and the other of the first elastic snap-fit ​​member and the first snap-fit ​​groove is disposed in the second guide sleeve. The first elastic snap-fit ​​member is engaged with the first snap-fit ​​groove.

3. The guide sleeve structure as described in claim 2, characterized in that, The inner side of the first guide sleeve is provided with a plurality of second mounting holes communicating with the first mounting hole. The plurality of second mounting holes extend radially along the first guide sleeve. The first elastic retaining member includes a plurality of glass ball rollers, each of which is installed in one of the second mounting holes. The first locking groove is provided on the outer side of the second guide sleeve, and the first locking groove is arranged axially around the second guide sleeve; when the second guide sleeve is assembled on the first guide sleeve, all the glass ball rollers are engaged and connected with the first locking groove.

4. The guide sleeve structure as described in claim 1, characterized in that, The second guide sleeve includes a sleeve body, which includes a first part and a second part disposed along the axial direction of the second guide sleeve. The first part is connected to the second part. When the second guide sleeve is assembled on the first guide sleeve, the first part is located inside the first mounting hole, and the second part is located outside the first mounting hole. In the axial direction of the second guide sleeve, the length of the first part is greater than the length of the second part.

5. The guide sleeve structure as described in claim 4, characterized in that, The second guide sleeve further includes an insert embedded in the first part and the second part, the hardness of the insert being greater than the hardness of the sleeve body, and the guide hole penetrating the first part, the second part and the insert along the axial direction of the second guide sleeve.

6. The guide sleeve structure as described in claim 1, characterized in that, The second guide sleeve includes a sleeve body, which includes a first part, a second part, and a third part connected sequentially along the axial direction of the second guide sleeve. When the second guide sleeve is assembled on the first guide sleeve, the first part is located inside the first mounting hole, and the second part is located outside the first mounting hole. In the axial direction of the second guide sleeve, the length of the first part is greater than the length of the second part, and the length of the first part is less than the length of the third part.

7. The guide sleeve structure as described in claim 6, characterized in that, The second guide sleeve further includes an insert embedded in the third part, the hardness of the insert being greater than the hardness of the sleeve body, and the guide hole penetrating the first part, the second part, the third part, and the insert along the axial direction of the second guide sleeve.

8. The guide sleeve structure as described in any one of claims 1-7, characterized in that, The outer circumferential surface of the first guide sleeve is provided with an anti-slip hand grip.

9. The guide sleeve structure as described in claim 8, characterized in that, The anti-slip grip portion consists of recesses and / or raised textures arranged axially around the first guide sleeve.

10. A CNC drilling machine, characterized in that, Includes the guide sleeve structure as described in any one of claims 1-9.

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