Drilling machine with novel drilling depth sensor transmission structure

Abstract

The utility model provides a drilling machine with a novel drilling depth sensor transmission structure. The drilling machine comprises a base, a stand column and a machine head. A mounting groove is formed in the machine head, a main shaft sleeve is inserted into the lower end of the machine head, a main shaft rack is vertically arranged at the upper end of the main shaft sleeve, a coil spring shaft and a gear shaft are vertically and eccentrically arranged in the mounting groove, a coil spring is fixedly connected to the front end of the coil spring shaft, and a linkage gear sleeves the middle section of the coil spring shaft; the outer end of the gear shaft is connected with a depth handle located on the outer side of the machine head, the middle section of the gear shaft is meshed with the linkage gear and the main shaft rack, and the inner side end of the gear shaft is connected with a sensor. According to the utility model, the coil spring shaft is matched and connected with the gear shaft, so that the coil spring is linked on the gear shaft which is meshed and connected with the linkage gear, and the coil spring is twisted to travel through the reduction ratio, and can adapt to longer drilling depth travel. The depth sensor is directly fixed on the gear shaft, the sensor directly detects the rotation stroke of the gear shaft, detection data are accurate, and the structure is compact.

Description

Technical Field

[0001] This utility model belongs to the field of drilling machines, and in particular relates to a drilling machine with a novel drilling depth sensor transmission structure. Background Technology

[0002] Drilling machines are common tools used in factories and homes for drilling and tapping threads in materials such as metal, wood, and plastic. Among various types of drilling machines, radial drilling machines are smaller in size, easier to operate, and more maneuverable than large CNC drilling machines. They are particularly suitable for processing small batches of parts with holes and are common machine tools in general machining workshops.

[0003] Existing radial drilling machines typically consist of a base, a vertically mounted column on one side of the base, a machine head mounted on the top of the column, a helical rack on the outer wall of the middle section of the column, and a worktable mounted in the middle section. The worktable's lifting bracket meshes with the helical rack; the lifting bracket moves up and down along the rack to adjust the height, while the worktable and its lifting bracket move left and right to adjust the angle. A depth handle is mounted on the outside of the machine head, controlling the raising and lowering of the machine head by rotating the handle. The depth handle connects to a gear shaft inside the machine head, and a coil spring is directly mounted on the gear shaft. The gear shaft and coil spring rotate synchronously, but their travel is limited. Additionally, a drilling depth sensor meshes with the spindle rack inside the spindle sleeve assembly via a gear. This structure requires a hole to be drilled on the side of the spindle sleeve for installation, which is inconvenient to manufacture and results in a less compact structure. Utility Model Content

[0004] This invention addresses the technical problem of the non-compact transmission structure of existing drilling depth sensors in drilling machines by proposing a drilling machine with high detection accuracy and a compact structure featuring a novel drilling depth sensor transmission structure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A drilling machine with a novel drilling depth sensor transmission structure includes a base, a column vertically mounted on one side of the base, and a drilling head mounted on the upper end of the column. The drilling head has a transversely penetrating mounting groove, and a spindle sleeve is inserted into the lower end of the drilling head. A spindle rack is vertically mounted on the upper end of the spindle sleeve. A coil spring shaft and a gear shaft are eccentrically positioned within the mounting groove. A coil spring is fixedly connected to the front end of the coil spring shaft, and a linkage gear is sleeved on the middle section of the coil spring shaft. The outer end of the gear shaft is connected to a depth handle located on the outside of the drilling head, and the middle section of the gear shaft meshes with both the linkage gear and the spindle rack. A sensor is connected to the inner end of the gear shaft.

[0007] Preferably, the sensor is provided with a mounting base and a connecting shaft at both ends. The mounting base is fixed to the inner wall of the machine head by a set screw, and the connecting shaft is connected to the gear shaft and fixed by a set screw.

[0008] Preferably, a spring cover is provided at the end of the mounting groove, and the spring cover is screwed to the machine head. Both the spring cover and the coil spring shaft are provided with long straight slots. Both the outer and inner ends of the coil spring are provided with right-angle bent hooks. The bent hooks on the inner side of the coil spring are inserted into the slots on the coil spring shaft, and the bent hooks on the outer side of the coil spring are inserted into the slots on the spring cover.

[0009] Preferably, the linkage gear is fixedly sleeved on the coil spring shaft, and the inner end of the coil spring shaft is mounted on the machine head by a nylon lock nut.

[0010] Preferably, the lower end of the machine head and the upper end of the base are respectively provided with a sleeve and a bottom cylinder, and the two ends of the column are respectively fixedly sleeved in the sleeve and the bottom cylinder.

[0011] Preferably, the outer side of the machine head is provided with an upper housing that covers the machine head, and a permanent magnet synchronous motor is provided on the machine head and located in the inner cavity of the upper housing. The outer side wall of the upper housing is provided with heat dissipation windows.

[0012] Preferably, a right-angled rotating seat is provided on the outer side of the lower end of the main shaft sleeve, and the lower end of the main shaft sleeve is rotatably sleeved on the rotating seat through a double-layer bearing. A side rod extending at a right angle and inserted into the machine head is provided on the side of the rotating seat.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0014] This invention connects the coil spring shaft and the gear shaft, so that the coil spring is linked to the gear shaft connected by the linkage gear. By reducing the speed ratio, the coil spring can be torsional and can adapt to a longer drilling depth.

[0015] Because the coil spring is driven by the meshing of the linkage gear, the space left at the end of the gear shaft allows the depth sensor to be directly fixed on the gear shaft. The sensor directly detects the rotational stroke of the gear shaft, resulting in accurate detection data and a compact structure. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a side view of the present invention;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of the column of this utility model.

[0019] Figure 4 for Figure 3 Enlarged view of the structure at point A in the middle;

[0020] Figure 5This is a three-dimensional structural diagram of the machine head of this utility model;

[0021] Figure 6 This is an exploded view of the head structure of this utility model;

[0022] Figure 7 This is an exploded perspective view of the head structure of this utility model;

[0023] Figure 8 This is a schematic diagram of the head structure of this utility model.

[0024] In the diagram: 1. Base; 2. Column; 3. Machine head; 4. Worktable; 5. Sleeve; 6. Helical rack; 7. Rotary handle; 8. Depth handle; 9. Lifting bracket; 10. Sleeve; 11. Bottom cylinder; 12. Support arm; 13. Crank handle; 14. Connecting pin; 15. Helical gear; 16. Rotating rod; 17. Worm gear; 18. Bushing; 19. Extension frame; 20. Permanent magnet synchronous motor; 21. Heat dissipation window; 22. Main spindle sleeve; 23. Spring cover; 24. Upper housing; 25. Main spindle rack; 26. Coil spring; 27. Coil spring shaft; 28. Linkage gear; 29. ​​Gear shaft; 30. Sensor; 31. Slot; 32. Bending hook; 33. Double-layer bearing; 34. Nylon lock nut; 35. Mounting base; 36. Connecting shaft; 37. Helical gear receiving cavity; 38. Screw hole. Detailed Implementation

[0025] To better understand this utility model, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.

[0026] like Figures 1-8 As shown, a multi-functional direct drive drilling machine includes a base 1, a worktable 4, and a head 3. A column 2 is vertically arranged on one side of the base 1. The head 3 is fixedly installed at the upper end of the column 2. A sleeve 10 and a bottom cylinder 11 are respectively provided at the lower end of the head 3 and the upper end of the base 1. The two ends of the column 2 are fixedly sleeved in the sleeve 10 and the bottom cylinder 11, respectively.

[0027] The middle section of the column 2 is provided with a helical rack 6 on its outer wall. A lifting bracket 9 is sleeved in the middle of the column 2. A support arm 12 is rotatably mounted on the lifting bracket 9. A worktable 4 facing the lower end of the machine head 3 is provided at the upper end of the support arm 12. A helical gear 15 is provided on the lifting bracket 9 and meshes with the helical rack 6. A drive assembly for driving the helical gear 15 is provided on the outer side of the lifting bracket 9.

[0028] Driven by the drive component, the helical gear 15 rotates, and then, under the meshing drive of the helical rack 6, the lifting bracket 9 is raised and lowered on the column 2, thereby achieving the purpose of adjusting the height of the worktable 4.

[0029] The drive assembly includes a rotating rod 16, a worm gear 17, and a handle 7. A helical gear 15 is rotatably mounted in the inner cavity of the lifting bracket 9 via a pin. The rotating rod 16 is inserted into the outer side of the lifting bracket 9. One end of the rotating rod 16 is provided with a worm gear 17 that meshes with the helical gear 15. The outer end of the rotating rod 16 is connected to the handle 7. The other end of the handle 7 is connected to a crank handle 13. A connecting pin 14 is provided on the rotating rod 16. The other end of the connecting pin 14 is inserted into the inner wall of the handle 7. A bushing 18 is sleeved on the middle section of the rotating rod 16. The worm gear 17 is located at the lower end of the helical gear 15. There is a gap between the teeth of the helical rack 6 and the inner wall of the lifting bracket 9. A sleeve 5 is provided at the end of the support arm 12. An extension frame 19 is provided at the upper end of the lifting bracket 9. The sleeve 5 is rotatably sleeved on the extension frame 19. A locking screw is threadedly inserted into the extension frame 19. The end of the locking screw is directly opposite the arc-shaped outer wall of the sleeve 5.

[0030] The lifting bracket 9 is provided with a helical gear receiving cavity 37, the left and right sides of which are connected to the outside. The helical gear 15 can be inserted into the helical gear receiving cavity 37 from the outside. The outer wall of the helical gear is provided with an annular groove along the radial direction. The lifting bracket is provided with screw holes 38, and screws inserted into the annular grooves are installed in the screw holes 38 to fix the helical gear in the helical gear receiving cavity. The helical gear 15 is an integral gear, and is axially positioned by screws and grooves, resulting in high positioning accuracy. When the helical gear needs to be replaced, simply unscrew the screws and then pull the helical gear out from the outside, making disassembly and replacement convenient.

[0031] This application forms a rotating structure by setting up the sleeve 5 and the lifting bracket 9. During the adjustment process, the crank handle 13 is turned, and the crank handle 13 drives the worm gear 17 to rotate. Through the meshing of the worm gear 17 and the helical gear 15, the helical gear 15 is pulled to mesh with the helical rack 6 to realize the lifting drive. The power generated at this time will drive the worktable 4 and the lifting bracket 9 to move up and down synchronously.

[0032] Meanwhile, the sleeve 5 and the extension frame 19 are installed with relative rotation. When adjusting the worktable 4 left and right, the two rotate relative to each other, while the lifting bracket 9 remains stationary. This achieves relative independence between rotation adjustment and lifting adjustment, avoiding mutual interference. The rack is fixedly installed on the column and does not need to rotate, avoiding the problem of the rack rotating with the worktable in traditional structures, which can easily cause the rack to jam or even bend, resulting in equipment damage.

[0033] Furthermore, the worm gear 17 is inserted from the outside, making it easy to maintain and replace. Both sides of the worm gear 17 are machined surfaces for positioning, ensuring high precision and preventing movement.

[0034] The machine head 3 is provided with a horizontally penetrating mounting groove. A main shaft sleeve 22 is inserted into the lower end of the machine head 3. A main shaft rack 25 is vertically installed at the upper end of the main shaft sleeve 22. A coil spring shaft 27 and a gear shaft 29 are eccentrically arranged in the mounting groove. A coil spring 26 is fixedly connected to the front end of the coil spring shaft 27. A linkage gear 28 is sleeved on the middle section of the coil spring shaft 27. The outer end of the gear shaft 29 is connected to a depth handle 8 located on the outside of the machine head 3. The middle section of the gear shaft 29 meshes with the linkage gear 28 and the main shaft rack 25 respectively. A sensor 30 is connected to the inner end of the gear shaft 29.

[0035] By setting the cooperating connection between the coil spring shaft 27 and the gear shaft 29, the relative rotation between the gear shaft 29 and the machine head 3 is kept consistent. The linkage gear 28 on the coil spring shaft 29 meshes with the gear shaft 29 to form a linkage structure. Then, in the lifting drilling drive, the depth data of the spindle sleeve 22 is detected in real time by the sensor 30 and transmitted to the main control system to realize the real-time display of the depth of the spindle sleeve 22 and the automatic control related to the depth of the spindle sleeve 22.

[0036] The outer side of the machine head 3 is provided with an upper housing 24 that covers the machine head 3. The machine head 3 is provided with a permanent magnet synchronous motor 20 located in the inner cavity of the upper housing 24. The outer side wall of the upper housing 24 is provided with a heat dissipation window 21.

[0037] By setting a side heat dissipation window 21, the heat dissipation airflow is prevented from impacting the human body vertically. Through the linkage structure designed in this application and the cooperation of the sensor 30, a permanent magnet synchronous motor 20 with sensorless control is adopted. This motor has a low failure rate, a wide speed range, high low-speed torque, and high-speed torque that is also higher than that of traditional AC asynchronous motors. It is suitable for tapping larger threads and for materials that require high-speed drilling.

[0038] The sensor 30 has a mounting base 35 and a connecting shaft 36 at its two ends. The mounting base 35 is fixed to the inner wall of the machine head 3 by a set screw, and the connecting shaft 36 is connected to the gear shaft 29 and fixed by a set screw.

[0039] The sensor 30 is mounted on the gear shaft 29 via the mounting base 35 and the connecting shaft 36.

[0040] A spring cover 23 is fastened to the end of the mounting slot on the machine head 3 by screws. Both the spring cover 23 and the coil spring shaft 27 are provided with long straight slots 31. The outer and inner ends of the coil spring 26 are provided with right-angle bent hooks 32. The bent hooks 32 on the inner side of the coil spring 26 are inserted into the slots 31 on the coil spring shaft 27, and the bent hooks 32 on the outer side of the coil spring 26 are inserted into the slots 31 on the spring cover 23.

[0041] By setting the slot 31 and the bent hook 32 to cooperate, the inner and outer ends of the coil spring 26 are fixedly connected.

[0042] The linkage gear 28 is fixedly sleeved on the coil spring shaft 27, and the inner end of the coil spring shaft 27 is installed on the machine head 3 by a nylon locking nut 34.

[0043] The inner end of the coil spring shaft 27 is installed by setting a nylon locking nut 34.

[0044] A right-angled rotating seat is provided on the outer side of the lower end of the main shaft sleeve 22. The lower end of the main shaft sleeve 22 is rotatably sleeved on the rotating seat through a double-layer bearing 33. A side rod extending at a right angle and inserted into the machine head 3 is provided on the side of the rotating seat.

[0045] By setting up a double-layer bearing 33, the load-bearing capacity of the spindle sleeve 22 is improved.

[0046] Working principle: First, the height and left and right rotation angle of the worktable 4 are adjusted by the drive component so that the height of the worktable 4 is adapted to drilling. During the adjustment process, the lifting bracket 9 and the extension bracket 19 work together to form independent lifting and rotation adjustments.

[0047] Then, through the cooperation of the coil spring shaft 27 and the gear shaft 29, the coil spring 26 is linked to the gear shaft 29 connected by the linkage gear 28. By reducing the speed ratio, the coil spring 26 can be torsional and can adapt to a longer drilling depth. Since the coil spring 26 is driven by the linkage gear 28, the end of the gear shaft 29 is left with space so that the depth sensor 30 can be directly fixed on the gear shaft 29.

[0048] The gear shaft 29 and the main shaft rack 25 on the main shaft sleeve 22 mesh, so rotating the depth handle 8 can drive the main shaft sleeve 22 to move up and down. The sensor 30 is connected to the gear shaft 29, ensuring that the connecting shaft 36 on the sensor 30 rotates together with the gear shaft 29. The sensor 30 is fixed to the machine head 3 by the mounting base 35 with a set screw, ensuring the relative rotation of the connecting shaft 36 and the sensor 30, thereby achieving consistency with the relative rotation of the gear shaft 29 and the machine head 3. The coil spring shaft 27 passes through the linkage gear 2. 8. Install the nylon locking nut 34 on the machine head 3. The linkage gear 28 meshes with the gear shaft 29. The coil spring 26 provides the force to lift the spindle sleeve 22 to the highest position. At this time, turn the depth handle 8 downward, and the spindle sleeve 22 moves downward. After releasing the handle, the spindle sleeve 22 automatically springs back to the highest position. At the same time, the depth data of the spindle sleeve 22 is detected in real time by the sensor 30 and transmitted to the main control system to realize the real-time display of the depth of the spindle sleeve 22 and the automatic control related to the depth of the spindle sleeve 22.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A drilling machine with a novel drilling depth sensor transmission structure, characterized in that: The device includes a base (1), a column (2) is vertically arranged on one side of the base (1), and a machine head (3) is installed on the upper end of the column (2); a horizontal through mounting groove is provided in the machine head (3), a main shaft sleeve (22) is inserted into the lower end of the machine head (3), a main shaft rack (25) is vertically arranged on the upper end of the main shaft sleeve (22), a coil spring shaft (27) and a gear shaft (29) are eccentrically arranged in the mounting groove, a coil spring (26) is fixedly connected to the front end of the coil spring shaft (27), a linkage gear (28) is sleeved on the middle section of the coil spring shaft (27), the outer end of the gear shaft (29) is connected to a depth handle (8) located on the outside of the machine head (3), the middle section of the gear shaft (29) meshes with the linkage gear (28) and the main shaft rack (25) respectively, and a sensor (30) is connected to the inner end of the gear shaft (29).

2. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The sensor (30) has a mounting base (35) and a connecting shaft (36) at its two ends respectively. The mounting base (35) is fixed to the inner wall of the head (3) by a set screw, and the connecting shaft (36) is connected to the gear shaft (29) and fixed by a set screw.

3. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The end of the mounting groove is provided with a spring cover (23), the spring cover (23) is screwed and fastened to the machine head (3), and both the spring cover (23) and the coil spring shaft (27) are provided with long straight slots (31). The outer and inner ends of the coil spring (26) are provided with right-angle bent hooks (32). The bent hooks (32) on the inner side of the coil spring (26) are inserted into the slots (31) on the coil spring shaft (27), and the bent hooks (32) on the outer side of the coil spring (26) are inserted into the slots (31) on the spring cover (23).

4. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The linkage gear (28) is fixedly sleeved on the coil spring shaft (27), and the inner end of the coil spring shaft (27) is installed on the machine head (3) by a nylon locking nut (34).

5. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The lower end of the machine head (3) and the upper end of the base (1) are respectively provided with a sleeve (10) and a bottom cylinder (11), and the two ends of the column (2) are respectively fixedly sleeved in the sleeve (10) and the bottom cylinder (11).

6. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The outer side of the machine head (3) is provided with an upper housing (24) that wraps around the machine head (3). The machine head (3) is provided with a permanent magnet synchronous motor (20) located in the inner cavity of the upper housing (24). The outer side wall of the upper housing (24) is provided with a heat dissipation window (21).

7. The drilling machine with a novel drilling depth sensor transmission structure according to claim 1, characterized in that: The lower end of the main shaft sleeve (22) is provided with a right-angled rotating seat. The lower end of the main shaft sleeve (22) is rotatably connected to the rotating seat through a double-layer bearing (33). The rotating seat is provided with a side rod that extends at a right angle and is inserted into the machine head (3).

Images