A guiding and stabilizing device for deep hole drilling of shaft parts

Abstract

This application provides a guiding and stabilizing device for deep hole drilling of shaft parts, relating to the field of shaft part machining technology. It includes a base, a fixing mechanism fixedly mounted on the top of the base, a shaft part mounted on the fixing mechanism, and supporting guide rails fixedly mounted on both sides of the rear of the top of the base. A top plate is fixedly mounted between the top ends of the two supporting guide rails. After the shaft part is clamped by the fixing mechanism, a hydraulic telescopic rod drives the motor frame to feed vertically along the stabilizing component. The limiting guide component moves downwards synchronously, and a servo motor drives the transmission screw to make the guide arc plate first hug the outer circle of the workpiece to form a rolling clamp. During drilling, the limiting guide component always follows and provides real-time lateral support, effectively offsetting the cutting impact, suppressing drill rod deflection, and eliminating the need to overcome the increasing spring reaction force, significantly improving the coaxiality and stability of deep hole machining.

Description

Technical Field

[0001] This utility model relates to the field of shaft parts processing technology, and more specifically, to a guiding and stabilizing device for deep hole drilling of shaft parts. Background Technology

[0002] In the field of mechanical manufacturing, shaft parts, as key transmission components, often have deep hole structures inside to meet functional requirements such as weight reduction, medium transportation, or installation of other components. Due to the inherent characteristics of deep hole drilling, such as the large ratio of hole depth to hole diameter, closed cutting zone, and narrow chip removal channel, extremely high requirements are placed on the rigidity of the process system and the stability of the cutting process.

[0003] For example, Chinese invention patent (publication number: CN107116250A) discloses a "CNC machining tool with a guiding device," which includes an integrated machine head and machine base. The machine head is vertically arranged and has a Z-axis guide rail device connected to its side. The machine base is horizontally placed and has vertically intersecting Y-axis and X-axis guide rail devices on it. This invention, through the design of the guiding device, makes drilling more stable and accurate, with no directional deviation and high precision.

[0004] Regarding the aforementioned technologies, this device has some shortcomings. In actual use, the device relies on the guide rod and compression spring to achieve end face elastic clamping. As the drilling depth increases, the relative sliding of the guide rod causes the spring compression to accumulate continuously, and the resulting reverse elastic restoring force also increases linearly. The feed system needs to overcome this increasing elastic force, which leads to axial drilling pressure instability and increased energy consumption, which is not conducive to the precise control of deep hole machining accuracy.

[0005] Therefore, we have made improvements to this and proposed a guiding and stabilizing device for deep hole drilling of shaft parts. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a guiding and stabilizing device for deep hole drilling of shaft parts, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A guiding and stabilizing device for deep hole drilling of shaft parts includes a base, a fixing mechanism fixedly installed on the top of the base, a shaft part being disposed on the fixing mechanism, support rails fixedly installed on both sides of the rear of the top of the base, and a top plate fixedly installed between the top ends of the two support rails.

[0009] A hydraulic telescopic rod is fixedly installed on the front side of the top of the top plate. The driving end of the hydraulic telescopic rod passes through the top plate and extends to the bottom of the top plate. A motor frame is fixedly installed on the driving end of the hydraulic telescopic rod. A drilling motor is fixedly installed on the motor frame. A drill rod is installed on the driving end of the drilling motor. A stabilizing component is provided between the support guide rail and the motor frame. A limit guide component is provided below the stabilizing component.

[0010] As a preferred technical solution of this application, the stabilization component includes guide blocks that are slidably mounted on the support rail, and connecting frames are fixedly installed between the two guide blocks and the motor frame.

[0011] As a preferred technical solution of this application, the limiting guide assembly includes an extension arm fixedly installed on the lower front side of the guide block. A limiting housing is fixedly installed below the front of each of the two extension arms. A transmission screw is rotatably installed between the two limiting housings at their rear ends. Both ends of the transmission screw pass through corresponding limiting housings and extend into the interior of the limiting housings, rotatably connecting with the inner wall of the limiting housings. Symmetrically distributed adjusting blocks are sleeved on the outer wall of the transmission screw. The adjusting blocks are located inside the limiting housings and slidably connected to the inner wall of the limiting housings. Guide rods are fixedly installed in front of the opposite sides of the two adjusting blocks. One end of the guide rod passes through the limiting housing and extends to the outside of the inner side of the limiting housing. Guide arc plates are fixedly installed at the opposite ends of the two guide rods. A servo motor is fixedly installed on the outer surface of one of the limiting housings. The drive end of the servo motor passes through the limiting housing and extends into the interior of the limiting housing. The drive end of the servo motor is fixedly connected to one end of the transmission screw.

[0012] As a preferred technical solution of this application, a protective sleeve rod is fixedly installed between the two limiting boxes. The inner diameter of the protective sleeve rod is larger than the outer diameter of the transmission screw, and the transmission screw is located inside the protective sleeve rod.

[0013] As a preferred technical solution of this application, the outer wall of the transmission screw is provided with symmetrically distributed left-hand threads and right-hand threads on both sides, and the adjusting block is provided with threaded holes adapted to the transmission screw. The adjusting block is threadedly connected to the transmission screw through the threaded holes thereon.

[0014] As a preferred technical solution of this application, a plurality of ball bearings are movably mounted on the inner surface of the guide arc plate.

[0015] As a preferred technical solution of this application, the vertical height of the guide arc plate is lower than the bottom end of the drill rod, and a sliding hole adapted to the guide rod is opened on the inner side of the limiting box. The limiting box is slidably connected to the guide rod through the sliding hole opened thereon.

[0016] As a preferred technical solution of this application, a reinforcing rod is fixedly installed between the front of the extension arm and the top of the limiting box.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In the scheme of this application:

[0019] 1. Through the coordinated use of the base, fixing mechanism, shaft parts, support guide rail, top plate, hydraulic telescopic rod, stabilizing component, and limiting guide component, the fixing mechanism clamps the shaft parts, and the hydraulic telescopic rod drives the motor frame to feed vertically along the guide of the stabilizing component. The limiting guide component moves downward synchronously and uses a servo motor to drive the transmission screw to make the guide arc plate first hug the outer circle of the workpiece to form a rolling clamp. During the drilling process, the limiting guide component always follows and fits to provide real-time lateral support, effectively offsetting the cutting impact, suppressing the drill rod deflection, and eliminating the need to overcome the spring incremental reaction force, significantly improving the coaxiality and stability of deep hole machining.

[0020] 2. By installing the protective sleeve, the large amount of flying chips generated during drilling can easily damage the exposed transmission components. Therefore, a protective sleeve is installed on the outside of the exposed section of the transmission screw between the two limit boxes. This protective sleeve forms a full-enclosed shielding protection for the transmission screw, so as to isolate the transmission screw from the direct impact of high-temperature and high-speed flying chips, thereby ensuring the stability and service life of the limit guide assembly transmission. Attached Figure Description

[0021] Figure 1 This application provides a three-dimensional structural schematic diagram of a guiding and stabilizing device for deep hole drilling of shaft parts;

[0022] Figure 2 A bottom view of the structure of a guide and stabilizing device for deep hole drilling of shaft parts provided in this application;

[0023] Figure 3 This application provides a schematic diagram of a stabilizing component in a deep hole drilling guide stabilization device for shaft parts.

[0024] Figure 4 This application provides a schematic diagram of the structure of a limiting guide assembly in a deep hole drilling guide stabilization device for shaft parts;

[0025] Figure 5 This application provides a schematic diagram of the structure of a guide arc plate in a deep hole drilling guide stabilization device for shaft parts.

[0026] The image shows:

[0027] 1. Base; 2. Fixing mechanism; 3. Shaft parts; 4. Support rail; 5. Top plate; 6. Hydraulic telescopic rod; 7. Stabilizing component; 8. Limiting and guiding component; 9. Motor frame; 10. Drilling motor; 11. Drill rod; 12. Connecting frame; 13. Guide block; 14. Extension arm; 15. Limiting box; 16. Reinforcing rod; 17. Transmission screw; 18. Servo motor; 19. Adjusting block; 20. Guide rod; 21. Guide arc plate; 22. Protective sleeve rod; 23. Ball bearing. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] Example 1

[0033] Please refer to Figures 1-5 A guiding and stabilizing device for deep hole drilling of shaft parts includes a base 1, a fixing mechanism 2 fixedly installed on the top of the base 1, a shaft part 3 disposed on the fixing mechanism 2, and support rails 4 fixedly installed on both sides of the rear of the top of the base 1, and a top plate 5 fixedly installed between the top ends of the two support rails 4.

[0034] A hydraulic telescopic rod 6 is fixedly installed on the front side of the top of the top plate 5. The driving end of the hydraulic telescopic rod 6 passes through the top plate 5 and extends to the bottom of the top plate 5. A motor frame 9 is fixedly installed on the driving end of the hydraulic telescopic rod 6. A drilling motor 10 is fixedly installed on the motor frame 9. A drill rod 11 is installed on the driving end of the drilling motor 10. A stabilizing component 7 is provided between the support guide rail 4 and the motor frame 9. A limit guide component 8 is provided below the stabilizing component 7.

[0035] Furthermore, the stabilization component 7 includes guide blocks 13 slidably mounted on the support rail 4, and connecting brackets 12 are fixedly installed between the two guide blocks 13 and the motor frame 9. This allows the off-center torque generated by the drilling feed motion to be transmitted to the support rail 4 via the connecting brackets 12, thereby distributing the load and constraining the radial sway of the motor frame 9, and improving the linear motion accuracy and vibration resistance of the drilling mechanism during vertical movement.

[0036] Furthermore, the limiting guide assembly 8 includes an extension arm 14 fixedly installed on the lower front side of the guide block 13. A limiting housing 15 is fixedly installed on the lower front side of each of the two extension arms 14. A transmission screw 17 is rotatably installed between the two limiting housings 15 at their rear ends. Both ends of the transmission screw 17 pass through corresponding limiting housings 15 and extend into the interior of the limiting housings 15, rotatably connecting with the inner wall of the limiting housings 15. Symmetrically distributed adjusting blocks 19 are sleeved on the outer wall of the transmission screw 17, and the adjusting blocks 19 are located inside the limiting housings 15. It is slidably connected to the inner wall of the limiting box 15. Guide rods 20 are fixedly installed on the front of the opposite sides of the two adjusting blocks 19. One end of the guide rod 20 passes through the limiting box 15 and extends to the outside of the inner side of the limiting box 15. Guide arc plates 21 are fixedly installed on the opposite ends of the two guide rods 20. A servo motor 18 is fixedly installed on the outer side of one of the limiting boxes 15. The drive end of the servo motor 18 passes through the limiting box 15 and extends into the inside of the limiting box 15. The drive end of the servo motor 18 is fixedly connected to one end of the transmission screw 17.

[0037] Furthermore, the outer wall of the transmission screw 17 is provided with symmetrically distributed left-hand and right-hand threads on both sides. The adjusting block 19 has a threaded hole that matches the transmission screw 17, and the adjusting block 19 is threadedly connected to the transmission screw 17 through the threaded hole. This can convert the single rotational motion of the transmission screw 17 into synchronous reverse linear displacement of the two adjusting blocks 19, realizing the rapid centering, clamping, and loosening of the guide arc plate 21.

[0038] Furthermore, several ball bearings 23 are movably mounted on the inner surface of the guide arc plate 21. This converts the sliding friction in the clamping state into rolling friction, significantly reducing the axial frictional resistance when the guide arc plate 21 moves downward, avoiding scratching the outer surface of the shaft part 3, and ensuring the ease of movement and real-time fit of the limit guide assembly 8 as it moves synchronously with the drilling depth.

[0039] Furthermore, the vertical height of the guide arc plate 21 is lower than the bottom of the drill rod 11, so that the clamping and limiting action can be completed before the drill tip contacts the workpiece, ensuring effective lateral support at the moment of cutting. The inner side of the limiting box 15 is provided with a sliding hole that matches the guide rod 20. The limiting box 15 is slidably connected to the guide rod 20 through the sliding hole, which can provide precise linear guidance constraint for the radial opening and closing movement of the adjusting block 19 and the guide arc plate 21.

[0040] Furthermore, a reinforcing rod 16 is fixedly installed between the front of the extension arm 14 and the top of the limiting box 15 to improve the connection strength between the extension arm 14 and the limiting box 15.

[0041] Example 2

[0042] The guiding and stabilizing device for deep hole drilling of shaft parts provided in Embodiment 1 is further optimized. Specifically, a protective sleeve rod 22 is fixedly installed between the two limiting boxes 15. The inner diameter of the protective sleeve rod 22 is larger than the outer diameter of the transmission screw 17, and the transmission screw 17 is located inside the protective sleeve rod 22. This effectively prevents drilling debris from splashing into the exposed area of ​​the transmission screw 17, improving the operational stability of the transmission screw 17.

[0043] The usage process of the guiding and stabilizing device for deep hole drilling of shaft parts provided by this utility model is as follows:

[0044] In use, the shaft part 3 to be processed is clamped and positioned by the fixing mechanism 2. Then, the hydraulic telescopic rod 6 drives the motor frame 9 to feed vertically. The motor frame 9 drives the guide block 13 to slide along the support guide rail 4 through the connecting frame 12 in the stabilizing component 7 to provide vertical movement guidance. The motor frame 9 synchronously drives the drilling motor 10 and the drill rod 11 to move. At the same time, the limiting guide component 8 moves down in conjunction with the guide block 13, and the two guide arc plates 21 on it reach the top sides of the shaft part 3 before the drill rod 11. At this time, the servo motor 18 drives the transmission screw 17 to rotate. Utilizing the transmission cooperation of the left-hand and right-hand threads and the sliding constraint between the adjusting block 19 and the inner wall of the limiting box 15, the two adjusting blocks 19 are driven to move relative to each other and are driven by the guide rod 20. The guide arc plate 21 closes, so that the ball bearings 23 on the inner wall of the guide arc plate 21 form a rolling contact clamping with the outer circle of the shaft part 3; the drilling motor 10 drives the drill rod 11 to rotate and is pushed by the hydraulic telescopic rod 6 to move down synchronously with the stabilizing component 7 and the limiting guide component 8 to complete the drilling feed. During this process, the limiting guide component 8 always applies rolling clamping limit to the outer wall of the shaft part 3 to offset the impact load generated by the instantaneous cutting of the drill bit and improve the contact stiffness. As the drilling depth extends, the guide arc plate 21 maintains rolling contact with the outer wall of the shaft part 3 with the help of the ball bearings 23 and moves down accordingly, providing real-time guidance and clamping throughout the process. Compared with the traditional elastic clamping structure, it does not need to overcome the increasing reaction force of the spring, which is conducive to the precise control of the deep hole machining accuracy.

[0045] It should be noted that all components used in this application are standard parts that can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The mechanical parts and electrical equipment adopt conventional models in the prior art. The circuit connection adopts conventional connection methods in the prior art. The electrical equipment is connected to an external safe power source. These will not be described in detail here.

[0046] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0047] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A guiding and stabilizing device for deep hole drilling of shaft parts, characterized in that, Includes a base (1), a fixing mechanism (2) is fixedly installed on the top of the base (1), a shaft part (3) is provided on the fixing mechanism (2), and support rails (4) are fixedly installed on both sides of the rear of the top of the base (1), and a top plate (5) is fixedly installed between the top ends of the two support rails (4). A hydraulic telescopic rod (6) is fixedly installed on the front side of the top of the top plate (5). The driving end of the hydraulic telescopic rod (6) passes through the top plate (5) and extends to the bottom of the top plate (5). A motor frame (9) is fixedly installed on the driving end of the hydraulic telescopic rod (6). A drilling motor (10) is fixedly installed on the motor frame (9). A drill rod (11) is installed on the driving end of the drilling motor (10). A stabilizing component (7) is provided between the support guide rail (4) and the motor frame (9). A limit guide component (8) is provided below the stabilizing component (7).

2. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 1, characterized in that, The stabilization component (7) includes guide blocks (13) that are slidably mounted on the support rail (4), and connecting frames (12) are fixedly installed between the two guide blocks (13) and the motor frame (9).

3. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 2, characterized in that, The limiting guide assembly (8) includes an extension arm (14) fixedly installed on the lower front side of the guide block (13). A limiting housing (15) is fixedly installed below the front of each of the two extension arms (14). A transmission screw (17) is rotatably installed between the two limiting housings (15). Both ends of the transmission screw (17) pass through the corresponding limiting housings (15) and extend into the interior of the limiting housings (15), rotatably connecting with the inner wall of the limiting housings (15). Symmetrically distributed adjusting blocks (19) are sleeved on the outer wall of the transmission screw (17). The adjusting blocks (19) are located inside the limiting housings (15) and are connected to the limiting housings (15). The inner wall of the limiting box (15) is slidably connected. Guide rods (20) are fixedly installed on the front of the opposite sides of the two adjusting blocks (19). One end of the guide rod (20) passes through the limiting box (15) and extends to the outside of the inner side of the limiting box (15). Guide arc plates (21) are fixedly installed on the opposite ends of the two guide rods (20). A servo motor (18) is fixedly installed on the outer side of one of the limiting boxes (15). The driving end of the servo motor (18) passes through the limiting box (15) and extends to the inside of the limiting box (15). The driving end of the servo motor (18) is fixedly connected to one end of the transmission screw (17).

4. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 3, characterized in that, A protective sleeve rod (22) is fixedly installed between the two limiting boxes (15). The inner diameter of the protective sleeve rod (22) is larger than the outer diameter of the transmission screw (17). The transmission screw (17) is located inside the protective sleeve rod (22).

5. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 3, characterized in that, The outer wall of the transmission screw (17) is provided with symmetrically distributed left-hand threads and right-hand threads on both sides. The adjusting block (19) is provided with a threaded hole that matches the transmission screw (17). The adjusting block (19) is threadedly connected to the transmission screw (17) through the threaded hole.

6. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 3, characterized in that, Several ball bearings (23) are movably mounted on the inner surface of the guide arc plate (21).

7. The guiding and stabilizing device for deep hole drilling of shaft parts according to claim 3, characterized in that, The vertical height of the guide arc plate (21) is lower than the bottom of the drill rod (11). The inner side of the limiting box (15) is provided with a sliding hole that matches the guide rod (20). The limiting box (15) is slidably connected to the guide rod (20) through the sliding hole.

8. A guiding and stabilizing device for deep hole drilling of shaft parts according to claim 3, characterized in that, A reinforcing rod (16) is fixedly installed between the front of the extension arm (14) and the top of the limiting box (15).

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