Novel power drill for deep cavity side hole machining

Abstract

The utility model discloses a novel power drill for deep cavity side hole machining. The novel power drill comprises a vertical drill arm, a driving part, a driven part, an elastic chuck, a driving motor and a transmission belt, the vertical drill arm is provided with a transmission cavity of a vertical hole channel structure. The driving part is rotationally connected with the upper end of the transmission cavity and connected with a driving motor through a coupler; the driven part is rotationally connected with the two sides of the lower end of the transmission cavity, thrust bearings are further arranged at one end of the driven shaft and one side wall of the transmission cavity, and the driven shaft is a hollow shaft. The elastic chuck is in interference connection with the positioning clamping hole of the driven shaft; the transmission belt is located in the transmission cavity, the two ends of the transmission belt wrap the driving wheel, the driven wheel and the vertical drill arm to enter the deep cavity of the part, the drill bit fixed by the elastic chuck is aligned with the position to be drilled, the driving motor is started, and the drill bit drills a lateral hole of the deep cavity part. The high-precision drilling device has the advantages of being compact in structure and capable of penetrating into a specific narrow cavity to conduct high-precision drilling.

Description

Technical Field

[0001] The utility model relates to the field of machining, in particular to a new power drill for machining deep cavity side holes. Background Art

[0002] In the current machining field, the pursuit of high-precision processing of special-shaped contour parts is increasing. For example, the narrow and deep side holes in the cavities of parts are currently processed using side milling heads. However, the defects are: first, as a machine tool accessory, the side milling head is large in size and relies on the machine tool spindle power, making it difficult to process side holes in a small space; second, the side milling head is too large and easily rubs against parts or damages the tool during processing, resulting in low product yield. Utility Model Content

[0003] In order to solve one or more of the above problems, the present invention provides a new power drill for deep cavity side hole processing.

[0004] According to one aspect of the present invention, the new power drill for deep cavity side hole processing includes: a vertical drill arm, an active part, a passive part, an elastic chuck, a drive motor and a transmission belt;

[0005] A transmission cavity with a vertical channel structure is provided inside the vertical drill arm;

[0006] The driving wheel of the driving part is located at the upper end of the transmission cavity and is fixedly connected to the inner end of the driving shaft. The middle of the driving shaft is rotatably connected to a side wall of the upper end of the transmission cavity. The outer end of the driving shaft extends out of the transmission cavity and is connected to the drive motor through a coupling.

[0007] The passive wheel of the passive part is located at the lower end of the transmission cavity and is fixedly connected to the middle of the passive shaft. Both ends of the passive shaft are rotatably connected to the two side walls of the lower end of the transmission cavity through rolling bearings. One end of the passive shaft and one side wall of the transmission cavity are also provided with thrust bearings. One end of the passive shaft is provided with a positioning clamp hole and the other end is provided with a through-drilled hole connected to the positioning clamp hole.

[0008] The elastic chuck is interference-connected with the positioning clamp hole, and the drill bit passes through the drill hole and is interference-connected with the positioning clamp hole of the elastic chuck;

[0009] The transmission belt is located in the transmission cavity and its two ends are respectively wrapped around the driving wheel and the driven wheel. The vertical drill arm enters the deep cavity of the part and aligns the drill bit with the position to be drilled. The drive motor is started and the drill bit drills the lateral hole of the deep cavity part.

[0010] In some embodiments, the vertical drill boom includes a vertical boom body and a cover plate, which are detachably connected by threads and the cavity enclosed by the vertical boom body forms a transmission cavity;

[0011] The middle of the driving shaft is rotatably connected to the first bearing hole at the upper end of the vertical arm body through the first rolling bearing, and the two ends of the passive shaft are rotatably connected to the second bearing hole at the lower end of the vertical arm body and the fourth bearing hole at the lower end of the cover plate through the second rolling bearing and the third rolling bearing. The thrust bearing inside the second rolling bearing at the lower end of the vertical arm body is rotatably connected to the third bearing hole.

[0012] In some embodiments, a wear-resistant washer is further sleeved in the third bearing hole. The wear-resistant washer is sleeved on the passive shaft and has thrust bearings and passive wheels on both sides.

[0013] In some embodiments, a protruding reinforcing rib is provided on the inner side of the vertical arm body between the first bearing hole and the second bearing hole; the cover plate and the reinforcing rib are positioned by positioning pins and connected into one body by flat head screws.

[0014] In some embodiments, a positioning shoulder is provided on the vertical arm body, and the vertically bent wing plate of the cover plate is sealed and fitted with an interference sleeve on the outer wall of the positioning shoulder.

[0015] In some embodiments, a first bearing hole and a tensioning hole are formed in the power platform at the upper end of the vertical arm body, and the outer side of the power platform is threadedly connected to the upper sealing plate.

[0016] In some embodiments, a three-way positioning connection sleeve is provided at the upper end of the vertical arm body.

[0017] In some embodiments, a tensioning shaft is fixedly connected to the tensioning hole at the upper end of the vertical arm body, the tensioning shaft is rotatably connected to the tensioning wheel, and the transmission belt is sequentially wrapped around the driving wheel, the tensioning wheel, and the driven wheel.

[0018] In some embodiments, the driving wheel is an active synchronous pulley, the driven wheel is a passive synchronous pulley, and the transmission belt is a synchronous belt;

[0019] Or the tensioning wheel is a rolling bearing; or the driving motor is a high-voltage brushless motor.

[0020] In some embodiments, the driving wheel and the driving shaft are connected by a key or are integrally connected; the driven wheel and the driven shaft are connected by a key or are integrally connected.

[0021] The new power drill for deep cavity side hole processing has an overall slender vertical drill arm, a transmission cavity accommodating a synchronous belt, and the side wall of the drill arm directly processes the relevant holes of each wheel and bearing, which greatly reduces the size of the equipment and is suitable for deep cavity processing. Its beneficial effects are: first, the vertical drill arm of the device has a cavity structure to accommodate the transmission system, and the passive shaft sleeve of the hollow shaft structure fixes the elastic chuck. The overall size is compact and can move forward and backward in a specific narrow cavity to perform high-precision drilling processing; second, its own structure size is small, which is convenient for shifting in the cavity, effectively improving the processing accuracy and high product yield; third, since it has its own drive motor, especially a high-power brushless motor, it can quickly start, stop and adjust the speed, which is convenient for integration with automation equipment to realize processing automation; fourth, the vertical drill arm is an overall slender structure with high overall rigidity and equipment precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional schematic diagram of a new power drill for deep cavity side hole machining according to one embodiment of the present utility model;

[0023] Figure 2 for Figure 1 The schematic diagram of the main view of the new power drill for deep cavity side hole processing is shown;

[0024] Figure 3 for Figure 2 The AA cross-sectional view of the new power drill for deep cavity side hole processing is shown;

[0025] Figure 4 for Figure 1 The left side view schematic diagram of the new power drill used for deep cavity side hole processing is shown;

[0026] Figure 5 for Figure 4 BB schematic diagram of a new power drill for deep cavity side hole processing;

[0027] Figure 6 for Figure 5 A partial enlarged schematic diagram of the new power drill shown (I);

[0028] Figure 7 for Figure 5 A partial enlarged schematic diagram of the new power drill shown (II);

[0029] Figure 8 for Figure 1 A three-dimensional exploded schematic diagram of the vertical drill arm is shown;

[0030] Figure 9 for Figure 8 A three-dimensional schematic diagram of the elastic collet shown;

[0031] Figure 10 for Figure 1 A three-dimensional schematic diagram of the transmission system of the new power drill shown;

[0032] Vertical drill arm 1, transmission chamber 10, vertical arm body 11, reinforcing rib 110, first bearing hole 111, second bearing hole 112, third bearing hole 113, first threaded blind hole 114, lower pin hole 115, positioning shoulder 116, tensioning hole 117, cover plate 12, wing plate 120, fourth bearing hole 121, countersunk through hole 122, upper pin hole 123, flat head screw 13, positioning pin 14, power platform 15, upper sealing plate 16, three-way positioning connecting sleeve 17, vertical connecting hole 171, radial connecting hole 172;

[0033] Active part 2, active wheel 21, active shaft 22, first rolling bearing 23;

[0034] Passive part 3, passive wheel 31, passive shaft 32, positioning clamp hole 320, through-drilled hole 321, second rolling bearing 33, thrust bearing 34, third rolling bearing 35;

[0035] Elastic chuck 4, arc clip 40, hexagonal operating end 41, tensioning gap 42;

[0036] Driving motor 5, motor base 51;

[0037] Transmission belt 6; Coupling 7;

[0038] Tensioning part 8, tensioning shaft 81, tensioning wheel 82;

[0039] Wear-resistant washers 9. DETAILED DESCRIPTION

[0040] The present invention will be described in further detail below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0041] Figures 1 to 10 A schematic diagram shows a new power drill for deep cavity side hole machining according to one embodiment of the present invention. As shown in the figure, the device includes: a vertical drill arm 1, an active part 2, a passive part 3, a spring chuck 4, a drive motor 5, and a transmission belt 6;

[0042] A transmission chamber 10 with a vertical channel structure is provided inside the vertical drill arm 1;

[0043] The driving wheel 21 of the driving unit 2 is located at the upper end of the transmission chamber 10 and is fixedly connected to the inner end of the driving shaft 22. The driving wheel 21 and the driving shaft 22 are preferably keyed or integrally connected. This integrated design further reduces the size of the device and improves transmission accuracy. The driving shaft 22 is pivotally connected to a sidewall at the upper end of the transmission chamber 10. Its outer end extends out of the transmission chamber 10 and is connected to the drive motor 5 via a coupling 7. The drive motor 5 is preferably a high-voltage brushless motor.

[0044] The passive wheel 31 of the passive unit 3 is located at the lower end of the transmission chamber 10 and is fixedly connected to the center of the passive shaft 32. The passive wheel 31 and the passive shaft 32 are keyed or integrally connected, further reducing the size of the device and improving transmission accuracy. The two ends of the passive shaft 32 are rotatably connected to the two side walls of the lower end of the transmission chamber 10 via rolling bearings. A thrust bearing 34 is also provided at one end of the passive shaft 32 and at one side wall of the transmission chamber 10. A positioning clamp hole 320 is provided at one end of the passive shaft 32, and a through-hole 321 is provided at the other end, communicating with the positioning clamp hole 320.

[0045] The elastic chuck 4 is interference-connected with the positioning clamp hole 320 , and the drill bit passes through the through-drill hole 321 and is interference-connected with the positioning clamp hole 320 of the elastic chuck 4 ;

[0046] The transmission belt 6 is located in the transmission cavity 10 and its two ends respectively wrap around the driving wheel 21 and the driven wheel 31. The vertical drilling arm 1 enters the deep cavity of the part and aligns the drill bit with the position to be drilled. The drive motor 5 is started and the drill bit drills the lateral hole of the deep cavity part.

[0047] The new power drill for deep cavity side hole processing has an overall slender vertical drill arm 1, a transmission cavity 10 that accommodates a synchronous belt, and the side wall of the drill arm directly processes the relevant holes of each wheel and bearing, which greatly reduces the size of the equipment and is suitable for deep cavity processing. Its beneficial effects are: first, the vertical drill arm 1 of the device has a cavity structure to accommodate the transmission system, and the passive shaft 32 of the hollow shaft structure has a sleeve that fixes the elastic chuck 4. The overall size is compact and can be penetrated into a specific narrow cavity to advance and retreat and rotate for high-precision drilling processing; second, its own structure size is small, which is convenient for shifting in the cavity, effectively improving the processing accuracy and high product yield; third, since it has its own drive motor 5, especially a high-power brushless motor, it can quickly start, stop and adjust the speed, which is convenient for integration with automation equipment to realize processing automation; fourth, the vertical drill arm 1 is an overall slender structure with high overall rigidity and equipment precision.

[0048] Furthermore, the vertical drill arm 1 includes a vertical arm body 11 and a cover plate 12, which are detachably connected by threads and the cavity surrounded by the two forms a transmission cavity 10;

[0049] A first horizontal bearing hole 111 is provided at the upper end of the vertical arm body 11 and a second horizontal bearing hole 112 is provided at the lower end. A third bearing hole 113 with a larger diameter is provided inside the second bearing hole 112. A fourth horizontal bearing hole 121 is provided at the lower end of the cover plate 12.

[0050] The center of the driving shaft 22 is rotatably connected to the first bearing hole 111 via the first rolling bearing 23. The ends of the driven shaft 32 are rotatably connected to the second bearing hole 112 and the fourth bearing hole 121 via the second rolling bearing 33 and the third rolling bearing 35. The thrust bearing 34 inside the second rolling bearing 33 is rotatably connected to the third bearing hole 113. The beneficial effects of this arrangement are: the vertical drill boom 1 has high positioning accuracy, a small overall size, and can output effective transmission power.

[0051] Preferably, a wear-resistant washer 9 is sleeved in the third bearing hole 113, and the wear-resistant washer 9 is sleeved on the passive shaft 32 and is fitted with the thrust bearing 34 and the passive wheel 31 on both sides. The beneficial effect is that the wear-resistant washer 9 can effectively increase the service life of the bearing.

[0052] Preferably, a protruding reinforcing rib 110 is provided on the inner side of the vertical arm body 11 between the first bearing hole 111 and the second bearing hole 112. The reinforcing rib 110 is threadedly connected to the cover plate 12. The beneficial effect is that the reinforcing rib 110 improves the overall rigidity of the vertical drill arm 1.

[0053] Preferably, the reinforcing rib 110 is provided with a plurality of first threaded blind holes 114 and a lower pin hole 115; the cover plate 12 is provided with a plurality of countersunk through holes 122 and an upper pin hole 123;

[0054] The flat head screw 13 passes through the countersunk through hole 122 and is threadedly connected to the first threaded blind hole 114. The inner end of the positioning pin 14 is interference-connected to the lower pin hole 115 and the outer end is connected to the upper pin hole 123. Its beneficial effect is that: this arrangement improves the connection accuracy and facilitates disassembly and maintenance.

[0055] Preferably, a positioning shoulder 116 is provided on the vertical arm body 11, and the vertically bent wing plate 120 of the cover plate 12 interferes with the shaft sleeve and is sealed against the outer wall of the positioning shoulder 116. Its beneficial effect is that this arrangement improves positioning accuracy and sealing, and prevents foreign matter from entering the transmission cavity.

[0056] Preferably, a rectangular, thickened power platform 15 is further provided at the upper end of the drop arm 11. A first bearing hole 111 and a tensioning hole 117 are formed within the power platform 15. The outer side of the power platform 15 is threadedly connected to the upper sealing plate 16. The two side surfaces of the power platform 13 are threadedly connected to the front and rear wall panels of the motor base 51. The side connecting plates of the motor base 51 are threadedly connected to the flange of the drive motor 5. The coupling 7 is located within the inner cavity of the motor base 51. This advantageous effect is that this structure further enhances the strength of the equipment.

[0057] Preferably, the upper end of the vertical arm body 11 is further provided with a cylindrical three-way positioning connecting sleeve 17, the upper end wall of the three-way positioning connecting sleeve 17 is provided with a vertical connecting hole 171 and the circumferential wall is provided with a radial connecting hole 172. The effect is that this arrangement can ensure that the equipment is well fixed and high-precision machining can be performed.

[0058] Furthermore, a tensioning hole 117 with a vertically oblong hole structure is provided at the upper end of the vertical arm body 11. This tensioning hole 117 is located below and outside the first bearing hole 111. A tensioning shaft 81 of the tensioning unit 8 is fixedly connected to the tensioning shaft 81. The tensioning pulley 82 is rotatably connected to the tensioning shaft 81. The transmission belt 6 wraps around the driving pulley 21, the tensioning pulley 82, and the driven pulley 31 in sequence from top to bottom. Preferably, the tensioning pulley 82 is a rolling bearing. This advantageously increases the tension of the belt by the tensioning unit 8 and prevents slippage.

[0059] Preferably, the driving wheel 21 is an active synchronous pulley, the driven wheel 31 is a passive synchronous pulley, and the transmission belt 6 is a synchronous belt. Its beneficial effects are: the structure has high transmission accuracy, effectively prevents slippage, and has a large output force.

[0060] Furthermore, the rear end of the elastic chuck 4 is provided with a hexagonal operating end 41 and a conical clamping end on the inner side, and the conical clamping end is divided into a plurality of arc clamping pieces 40 by a plurality of circumferentially distributed tensioning gaps 42. The effect is that this arrangement can effectively clamp the drill bit.

[0061] The outer end of the positioning clamp hole 320 is a cylindrical hole and the inner end is a conical hole; the through drill hole 321 is a hexagonal hole that fits with the two ends of the drill bit.

[0062] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A new type of power drill for deep cavity side hole processing, characterized by: It comprises: a vertical drill arm (1), an active part (2), a passive part (3), an elastic chuck (4), a drive motor (5) and a transmission belt (6); A transmission chamber (10) with a vertical channel structure is provided inside the vertical drill arm (1); The driving wheel (21) of the driving part (2) is located at the upper end of the transmission cavity (10) and is fixedly connected to the inner end of the driving shaft (22); the middle of the driving shaft (22) is rotatably connected to a side wall of the upper end of the transmission cavity (10); the outer end of the driving shaft (22) extends out of the transmission cavity (10) and is connected to the drive motor (5) through a coupling (7); The passive wheel (31) of the passive part (3) is located at the lower end of the transmission cavity (10) and is fixedly connected to the middle of the passive shaft (32). The two ends of the passive shaft (32) are rotatably connected to the two side walls of the lower end of the transmission cavity (10) through rolling bearings. One end of the passive shaft (32) and one side wall of the transmission cavity (10) are also provided with a thrust bearing (34). One end of the passive shaft (32) is provided with a positioning clamping hole (320) and the other end is provided with a through-drilled hole (321) connected to the positioning clamping hole (320). The elastic chuck (4) is interference-connected with the positioning clamp hole (320), and the drill bit passes through the through-drill hole (321) and is interference-connected with the positioning clamp hole (320) of the elastic chuck (4); The transmission belt (6) is located in the transmission cavity (10) and its two ends respectively surround the driving wheel (21) and the driven wheel (31). The vertical drilling arm (1) enters the deep cavity of the component and aligns the drill bit with the position to be drilled. The driving motor (5) is started, and the drill bit drills the lateral hole of the deep cavity component.

2. The new power drill for deep cavity side hole processing according to claim 1 is characterized in that: The vertical drill arm (1) comprises a vertical arm body (11) and a cover plate (12), the two being detachably connected via threads and the cavity enclosed by the two forming the transmission cavity (10); The middle of the driving shaft (22) is rotatably connected to the first bearing hole (111) at the upper end of the hanging arm body (11) through a first rolling bearing (23); the two ends of the driven shaft (32) are rotatably connected to the second bearing hole (112) at the lower end of the hanging arm body (11) and the fourth bearing hole (121) at the lower end of the cover plate (12) through a second rolling bearing (33) and a third rolling bearing (35); the thrust bearing (34) inside the second rolling bearing (33) at the lower end of the hanging arm body (11) is rotatably connected to the third bearing hole (113).

3. The new power drill for deep cavity side hole processing according to claim 2 is characterized in that: A wear-resistant washer (9) is sleeved in the third bearing hole (113). The wear-resistant washer (9) is sleeved on the passive shaft (32) and has the thrust bearing (34) and the passive wheel (31) in contact with both sides.

4. The new power drill for deep cavity side hole processing according to claim 2 is characterized in that: A protruding reinforcing rib (110) is provided on the inner side of the vertical arm body (11) between the first bearing hole (111) and the second bearing hole (112); the cover plate (12) and the reinforcing rib (110) are positioned by positioning pins (14) and connected into one piece by flat head screws (13).

5. The new power drill for deep cavity side hole processing according to claim 2 is characterized in that: A positioning shoulder (116) is provided on the vertical arm body (11), and the vertically bent wing plate (120) of the cover plate (12) is sealed by an interference sleeve on the outer wall of the positioning shoulder (116).

6. The new power drill for deep cavity side hole processing according to claim 2 is characterized in that: A first bearing hole (111) and a tensioning hole (117) are formed in the power platform (15) at the upper end of the vertical arm body (11), and the outer side of the power platform (15) is threadedly connected to the upper sealing plate (16).

7. The new power drill for deep cavity side hole processing according to claim 6 is characterized in that: A three-way positioning connection sleeve (17) is provided at the upper end of the vertical arm body (11).

8. The new power drill for deep cavity side hole processing according to claim 2 is characterized in that: The tensioning hole (117) at the upper end of the vertical arm body (11) is fixedly connected to the tensioning shaft (81), and the tensioning shaft (81) is rotatably connected to the tensioning wheel (82). The transmission belt (6) is sequentially wrapped around the driving wheel (21), the tensioning wheel (82), and the driven wheel (31).

9. The new power drill for deep cavity side hole processing according to claim 8 is characterized in that: The driving wheel (21) is an active synchronous pulley, the passive wheel (31) is a passive synchronous pulley, and the transmission belt (6) is a synchronous belt; Or the tension wheel (82) is a rolling bearing; or the driving motor (5) is a high-voltage brushless motor.

10. The new power drill for deep cavity side hole processing according to claim 1 is characterized in that: The driving wheel (21) and the driving shaft (22) are connected by a key or are integrally connected; the driven wheel (31) and the driven shaft (32) are connected by a key or are integrally connected.

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