High-precision drilling device for motorcycle crank

Abstract

The invention relates to the technical field of drilling devices, and discloses a high-precision drilling device for a motorcycle crank, which comprises a lathe body, a spindle box is arranged at one end of the lathe body, a spindle is arranged in the spindle box, a three-jaw chuck is arranged at one end of the spindle, and the motorcycle crank is arranged in the three-jaw chuck. Through continuous rotation of the motorcycle crank, the limiting column drives the T-shaped arc sliding block to slide along the T-shaped arc sliding groove, when the T-shaped arc sliding block slides to the other end of the T-shaped arc sliding groove, sliding is stopped, at the moment, the limiting column limits continuous rotation of the motorcycle crank, and an operator pulls the main shaft locking wrench to lock rotation of the motorcycle crank; at the moment, the position of the crank neck of the motorcycle crank is fixed, the position of the crank neck of the motorcycle crank does not need to be manually aligned by a dial indicator through the device, and when the motorcycle cranks are drilled in batches, the production efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling devices, and in particular to a high-precision drilling device for a motorcycle crank. Background Art

[0002] A crank is a common mechanical device, usually consisting of a lever connecting two rotating parts. It consists of a fixed crank arm and a rotating arm connected to the other end of the crank arm. The crank is used to convert rotational motion into linear motion or vice versa. The high-precision drilling device of the crank is a device used to perform high-precision drilling operations on parts such as cranks.

[0003] When drilling holes in the existing crank drilling device, the operator manually clamps the crank on the three-jaw chuck, then aligns the position of the crank neck with a 100% indicator, and finally locks the spindle of the three-jaw chuck to drill the crank neck. Manually aligning the crank neck position is too slow, which greatly reduces the production efficiency when drilling holes in cranks in batches. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a high-precision drilling device for a motorcycle crank.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A high-precision drilling device for a motorcycle crank comprises a lathe body, wherein a spindle box is arranged at one end of the lathe body, a spindle is arranged inside the spindle box, a three-jaw chuck is arranged at one end of the spindle, a motorcycle crank is arranged inside the three-jaw chuck, a curved neck is arranged on the outer surface of the motorcycle crank, and the curved neck is arranged at an eccentric position of the motorcycle crank, a column is fixedly installed on the upper surface of the lathe body, a semicircular ring is fixedly installed on the bottom end of the column, a T-shaped arc groove is penetrated through the upper surface of the semicircular ring, a T-shaped arc slider is slidably installed on the inner wall of the T-shaped arc groove, a limiting column is fixedly installed on the upper surface of the T-shaped arc slider, the limiting column is abutted against the outer surface of the curved neck of the motorcycle crank, the semicircular ring, the three-jaw chuck and the motorcycle crank are arranged at the same center of a circle, and the axis of the limiting column passes through the center of the semicircular ring.

[0006] As a further solution of the present invention, a support is fixedly installed on the top of the column, a rotating shaft is rotatably installed between the inner walls of the support, an L-shaped rotating plate is installed on the outer surface fixed plate of the rotating shaft, a drill sleeve is slidably inserted on the top of the L-shaped rotating plate, the cross-section of the drill sleeve is arranged in an I-shape, and a second tension spring is provided on the outer surface of the drill sleeve close to one end of the semicircular ring, one end of the second tension spring is fixedly connected to one end of the drill sleeve, and the other end of the second tension spring is fixedly connected to the lower surface of the L-shaped rotating plate.

[0007] As a further solution of the present invention, two support plates are symmetrically fixedly installed on the lower surface of the semicircular ring, and a driving gear is rotatably installed between the two support plates. The bottom of the T-shaped arc slider passes through the lower surface of the semicircular ring and is fixedly installed with an arc rack, which is meshed with the driving gear, and the arc rack and the semicircular ring are arranged at the same center of a circle.

[0008] As a further solution of the present invention, one end of the driving gear passes through the outer surface of the support plate and is fixedly installed with a first pulley, the lower surface of the column near the top is rotatably installed with a second pulley, the outer surfaces of the first pulley and the second pulley are sleeved with belts, one end of the second pulley is fixedly installed with a driven gear, one end of the rotating shaft passes through the outer surface of the support and is fixedly installed with a fan-shaped gear, the fan-shaped gear is meshed with the driven gear, and a first tension spring is fixedly installed on the upper surface of the L-shaped rotating plate, and the bottom end of the first tension spring is fixedly connected to the end face of the top end of the column.

[0009] As a further solution of the present invention, a liquid storage box is fixedly installed on the upper surface of the L-shaped rotating plate, a one-way oil inlet nozzle is provided on the upper surface of the liquid storage box, a conduit is fixedly installed on the outer surface of the liquid storage box, a flow channel is opened on the top of the L-shaped rotating plate, the liquid outlet end of the conduit is fixedly connected to the inner wall of the flow channel, a through hole is opened through the circumferential outer surface of the drill sleeve, the liquid storage box is connected with the through hole through the flow channel and the conduit, and the through hole is connected with the interior of the drill sleeve.

[0010] As a further solution of the present invention, a limiting protrusion is provided on the circumferential outer surface of the drill sleeve, and a limiting groove matching the limiting protrusion is opened on the inner wall of the L-shaped rotating plate near the top, and the limiting protrusion is slidably installed on the inner wall of the limiting groove.

[0011] As a further solution of the present invention, a tailstock is arranged on the upper surface of the other end of the lathe body, a drilling machine is arranged on the upper surface of the lathe body, and a spindle locking wrench is arranged on the outer surface of the spindle box.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. The motorcycle crank continues to rotate, so that the limit column drives the T-shaped arc slider to slide along the T-shaped arc slot. When the T-shaped arc slider slides to the other end of the T-shaped arc slot, it stops sliding. At this time, the limit column limits the continued rotation of the motorcycle crank. The operator turns the spindle locking wrench to lock the rotation of the motorcycle crank. At this time, the position of the motorcycle crank neck is fixed. The device does not need to manually use a dial indicator to align the position of the motorcycle crank neck. When drilling holes in batches of motorcycle cranks, the production efficiency is greatly improved. 2. The rotating shaft drives the L-shaped rotating plate to move close to the motorcycle crank, and the L-shaped rotating plate drives the drill sleeve to move close to the motorcycle crank. Through this device, the drill sleeve moves to the position where the motorcycle crank neck needs to be drilled, which guides the drill bit on the drilling machine, and can accurately drill the crank neck of the motorcycle crank to avoid drilling deviation and causing the motorcycle crank to be scrapped. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 2 This is a schematic diagram of the top view of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 3 A schematic diagram of a semicircular ring of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 4 A schematic rear view of a semicircular ring of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 5 A schematic top view of a semicircular ring of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 6 A schematic diagram of an L-shaped rotating plate of a high-precision drilling device for a motorcycle crank proposed by the present invention; Figure 7 A schematic diagram of a drill sleeve of a high-precision drilling device for a motorcycle crank proposed by the present invention.

[0014] In the figure: 1. lathe body; 2. spindle box; 3. three-jaw chuck; 4. tailstock; 5. spindle locking wrench; 6. drilling machine; 7. motorcycle crank; 8. column; 801. support; 9. semicircular ring; 901. support plate; 10. T-shaped arc slide; 11. T-shaped arc slider; 12. limiting column; 13. arc rack; 14. driving gear; 15. first pulley; 16. belt; 17. second pulley; 18. driven gear; 19. sector gear; 20. L-shaped rotating plate; 21. first tension spring; 22. liquid storage box; 23. one-way oil inlet nozzle; 24. guide tube; 25. drill sleeve; 2501. through hole; 2502. limiting protrusion; 26. flow channel; 27. second tension spring. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0016] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Reference Figure 1-Figure 7 A high-precision drilling device for a motorcycle crank comprises a lathe body 1, a spindle box 2 is arranged at one end of the lathe body 1, a spindle is arranged inside the spindle box 2, a three-jaw chuck 3 is arranged at one end of the spindle, a motorcycle crank 7 is arranged inside the three-jaw chuck 3, a crank neck is arranged on the outer surface of the motorcycle crank 7, and the crank neck is arranged at the eccentric position of the motorcycle crank 7. A column 8 is fixedly installed on the upper surface of the lathe body 1, a semicircular ring 9 is fixedly installed on the bottom end of the column 8, a T-shaped arc groove 10 is penetrated through the upper surface of the semicircular ring 9, a T-shaped arc slider 11 is slidably installed on the inner wall of the T-shaped arc groove 10, a limiting column 12 is fixedly installed on the upper surface of the T-shaped arc slider 11, and the limiting column 12 is abutted against the outer surface of the crank neck of the motorcycle crank 7, the semicircular ring 9, the three-jaw chuck 3 and the motorcycle crank 7 are arranged at the same center, and the axis of the limiting column 12 passes through the center of the semicircular ring 9.

[0019] The three-jaw chuck 3 is manually turned to rotate, so that the three-jaw chuck 3 drives the motorcycle crank 7 to rotate. The motorcycle crank 7 rotates so that the neck of the outer surface is against the limit column 12. The motorcycle crank 7 continues to rotate, so that the limit column 12 drives the T-shaped arc slider 11 to slide along the T-shaped arc slot 10. When the T-shaped arc slider 11 slides to the other end of the T-shaped arc slot 10, it stops sliding. At this time, the limit column 12 limits the continued rotation of the motorcycle crank 7. The operator turns the spindle locking wrench 5 to lock the rotation of the motorcycle crank 7. At this time, the position of the neck of the motorcycle crank 7 is fixed. The device does not need to manually use a dial indicator to align the position of the neck of the motorcycle crank 7. When drilling holes in motorcycle cranks 7 in batches, the production efficiency is greatly improved.

[0020] In this embodiment, a support 801 is fixedly installed on the top of the column 8, and a rotating shaft is rotatably installed between the inner walls of the support 801. An L-shaped rotating plate 20 is installed on the fixed plate on the outer surface of the rotating shaft. A drill sleeve 25 is slidably inserted at the top of the L-shaped rotating plate 20. The cross-section of the drill sleeve 25 is set in an I-shaped shape. A second tension spring 27 is sleeved on the outer surface of the drill sleeve 25 close to one end of the semicircular ring 9. One end of the second tension spring 27 is fixedly connected to one end of the drill sleeve 25, and the other end of the second tension spring 27 is fixedly connected to the lower surface of the L-shaped rotating plate 20. Two support plates 901 are symmetrically fixedly installed on the lower surface of the semicircular ring 9. A driving gear 14 is rotatably installed between the two support plates 901. The bottom of the T-shaped arc slider 11 passes through the lower surface of the semicircular ring 9 and is fixedly installed An arc rack 13 is installed, the arc rack 13 is meshed with the driving gear 14, the arc rack 13 and the semicircular ring 9 are arranged at the same center, one end of the driving gear 14 passes through the outer surface of the support plate 901 and is fixedly installed with a first pulley 15, a second pulley 17 is rotatably installed on the lower surface of the column 8 near the top, the outer surfaces of the first pulley 15 and the second pulley 17 are sleeved with a belt 16, one end of the second pulley 17 is fixedly installed with a driven gear 18, one end of the rotating shaft passes through the outer surface of the support 801 and is fixedly installed with a fan gear 19, the fan gear 19 is meshed with the driven gear 18, a first tension spring 21 is fixedly installed on the upper surface of the L-shaped rotating plate 20, and the bottom end of the first tension spring 21 is fixedly connected to the end face of the top end of the column 8.

[0021] The arc rack 13 is driven to move by the movement of the T-shaped arc slider 11, and the arc rack 13 drives the first pulley 15 to rotate through the driving gear 14, and the first pulley 15 drives the second pulley 17 to rotate through the belt 16, and the second pulley 17 drives the driven gear 18 to rotate, and the driven gear 18 drives the rotating shaft to rotate through the fan gear 19, and the rotating shaft drives the L-shaped rotating plate 20 to move close to the motorcycle crank 7, and the L-shaped rotating plate 20 drives the drill sleeve 25 to move close to the motorcycle crank 7. Through this device, the drill sleeve 25 is moved to the position where the crank neck of the motorcycle crank 7 needs to be drilled, which plays a guiding role for the drill bit on the drilling machine 6, and can accurately drill the crank neck of the motorcycle crank 7 to avoid drilling deviation and causing the motorcycle crank 7 to be scrapped.

[0022] In this embodiment, a liquid storage box 22 is fixedly installed on the upper surface of the L-shaped rotating plate 20, and a one-way oil inlet nozzle 23 is provided on the upper surface of the liquid storage box 22. A conduit 24 is fixedly installed on the outer surface of the liquid storage box 22. A flow channel 26 is opened on the top of the L-shaped rotating plate 20, and the liquid outlet end of the conduit 24 is fixedly connected to the inner wall of the flow channel 26. A through hole 2501 is opened through the circumferential outer surface of the drill sleeve 25. The liquid storage box 22 is connected with the through hole 2501 through the flow channel 26 and the conduit 24. The through hole 2501 is connected with the interior of the drill sleeve 25. A limiting protrusion 2502 is provided on the circumferential outer surface of the drill sleeve 25. A limiting slide groove matching the limiting protrusion 2502 is opened on the inner wall of the L-shaped rotating plate 20 near the top, and the limiting protrusion 2502 is slidably installed with the inner wall of the limiting slide groove.

[0023] When the drill bit on the drilling machine 6 passes through the drill sleeve 25 to drill the neck of the motorcycle crank 7, the drill sleeve 25 will be driven to move close to the motorcycle crank 7. At this time, the through hole 2501 on the drill sleeve 25 is connected with the flow channel 26, and the drilling lubricating oil inside the liquid storage box 22 will enter the inside of the drill sleeve 25 through the conduit 24 and the flow channel 26. The outer surface of the drill bit inside the drill sleeve 25 is soaked with the drilling lubricating oil. The device can lubricate the drill bit when drilling, so that the drill bit can drill a hole tightly on the neck of the motorcycle crank 7.

[0024] In this embodiment, a tailstock 4 is provided on the upper surface of the other end of the lathe body 1, a drilling machine 6 is provided on the upper surface of the lathe body 1, and a spindle locking wrench 5 is provided on the outer surface of the spindle box 2. The operator manually clamps one end of the motorcycle crank 7 on the three-jaw chuck 3, fixes the position of the motorcycle crank 7 by the three-jaw chuck 3, and then presses the Morse center on the tailstock 4 against the tail of the motorcycle crank 7. The position of the motorcycle crank 7 is limited by this device, which is convenient for subsequent drilling.

[0025] It should be noted that when the present invention is used, the operator manually clamps one end of the motorcycle crank 7 on the three-jaw chuck 3, fixes the position of the motorcycle crank 7 by the three-jaw chuck 3, and then pushes the Morse center on the tailstock 4 against the tail of the motorcycle crank 7, and limits the position of the motorcycle crank 7 by the device, which is convenient for subsequent drilling; The operator manually turns the three-jaw chuck 3 to rotate, so that the three-jaw chuck 3 drives the motorcycle crank 7 to rotate. The motorcycle crank 7 rotates so that the neck of the outer surface is against the limit column 12. The motorcycle crank 7 continues to rotate, so that the limit column 12 drives the T-shaped arc slider 11 to slide along the T-shaped arc slot 10. When the T-shaped arc slider 11 slides to the other end of the T-shaped arc slot 10, it stops sliding. At this time, the limit column 12 limits the continued rotation of the motorcycle crank 7. The operator turns the spindle locking wrench 5 to lock the rotation of the motorcycle crank 7. At this time, the position of the neck of the motorcycle crank 7 is fixed. The device does not need to manually use a dial indicator to align the position of the neck of the motorcycle crank 7. When drilling holes in batches of motorcycle cranks 7, the production efficiency is greatly improved. The arc rack 13 is driven to move by the movement of the T-shaped arc slider 11, and the arc rack 13 drives the first pulley 15 to rotate through the driving gear 14, and the first pulley 15 drives the second pulley 17 to rotate through the belt 16, and the second pulley 17 drives the driven gear 18 to rotate, and the driven gear 18 drives the rotating shaft to rotate through the fan gear 19, and the rotating shaft drives the L-shaped rotating plate 20 to move close to the motorcycle crank 7, and the L-shaped rotating plate 20 drives the drill sleeve 25 to move close to the motorcycle crank 7. Through this device, the drill sleeve 25 moves to the position where the crank neck of the motorcycle crank 7 needs to be drilled, which plays a guiding role for the drill bit on the drilling machine 6, and can accurately drill the crank neck of the motorcycle crank 7, so as to avoid the motorcycle crank 7 being scrapped due to drilling deviation; Before use, the operator manually adds the drilling lubricant oil from the one-way oil inlet nozzle 23 into the liquid storage tank 22. When the drill bit on the drilling machine 6 passes through the drill sleeve 25 to drill the neck of the motorcycle crank 7, the drill sleeve 25 will be driven to move close to the motorcycle crank 7. At this time, the through hole 2501 on the drill sleeve 25 is connected with the flow channel 26. The drilling lubricant oil inside the liquid storage tank 22 will enter the inside of the drill sleeve 25 through the conduit 24 and the flow channel 26. The outer surface of the drill bit inside the drill sleeve 25 is soaked with the drilling lubricant oil. The device can lubricate the drill bit when drilling, which is convenient for the drill bit to drill a hole tightly on the neck of the motorcycle crank 7.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A high-precision drilling device for a motorcycle crank, comprising a lathe body (1), a spindle box (2) being arranged at one end of the lathe body (1), a spindle being arranged inside the spindle box (2), and a three-jaw chuck (3) being arranged at one end of the spindle, characterized in that: A motorcycle crank (7) is arranged inside the three-jaw chuck (3), and a curved neck is arranged on the outer surface of the motorcycle crank (7), and the curved neck is arranged at an eccentric position of the motorcycle crank (7). A column (8) is fixedly mounted on the upper surface of the lathe body (1), and a semicircular ring (9) is fixedly mounted on the bottom end of the column (8). A T-shaped arc groove (10) is penetrated through the upper surface of the semicircular ring (9), and a T-shaped arc slider (11) is slidably mounted on the inner wall of the T-shaped arc groove (10). A limiting column (12) is fixedly mounted on the upper surface of the T-shaped arc slider (11), and the limiting column (12) abuts against the outer surface of the curved neck of the motorcycle crank (7). The semicircular ring (9) is arranged at the same center as the three-jaw chuck (3) and the motorcycle crank (7), and the axis of the limiting column (12) passes through the center of the semicircular ring (9).

2. A high-precision drilling device for a motorcycle crank according to claim 1, characterized in that: A support (801) is fixedly mounted on the top of the column (8), a rotating shaft is rotatably mounted between the inner walls of the support (801), an L-shaped rotating plate (20) is mounted on the outer surface fixed plate of the rotating shaft, a drill sleeve (25) is slidably inserted on the top of the L-shaped rotating plate (20), the cross section of the drill sleeve (25) is arranged in an I-shaped shape, a second tension spring (27) is sleeved on the outer surface of the drill sleeve (25) close to one end of the semicircular ring (9), one end of the second tension spring (27) is fixedly connected to one end of the drill sleeve (25), and the other end of the second tension spring (27) is fixedly connected to the lower surface of the L-shaped rotating plate (20).

3. The high-precision drilling device for a motorcycle crank according to claim 2, characterized in that: Two support plates (901) are symmetrically fixedly mounted on the lower surface of the semicircular ring (9), a driving gear (14) is rotatably mounted between the two support plates (901), a circular arc rack (13) is fixedly mounted on the bottom of the T-shaped circular arc slider (11) penetrating through the lower surface of the semicircular ring (9), the circular arc rack (13) is meshed with the driving gear (14), and the circular arc rack (13) and the semicircular ring (9) are arranged at the same center.

4. The high-precision drilling device for a motorcycle crank according to claim 3, characterized in that: One end of the driving gear (14) passes through the outer surface of the support plate (901) and is fixedly mounted with a first pulley (15); a second pulley (17) is rotatably mounted on the lower surface of the column (8) near the top; a belt (16) is sleeved on the outer surfaces of the first pulley (15) and the second pulley (17); a driven gear (18) is fixedly mounted on one end of the second pulley (17); one end of the rotating shaft passes through the outer surface of the support (801) and is fixedly mounted with a fan-shaped gear (19); the fan-shaped gear (19) is meshed with the driven gear (18); a first tension spring (21) is fixedly mounted on the upper surface of the L-shaped rotating plate (20); the bottom end of the first tension spring (21) is fixedly connected to the end surface of the top end of the column (8).

5. The high-precision drilling device for a motorcycle crank according to claim 2, characterized in that: A liquid storage box (22) is fixedly mounted on the upper surface of the L-shaped rotating plate (20), a one-way oil inlet nozzle (23) is provided on the upper surface of the liquid storage box (22), a conduit (24) is fixedly mounted on the outer surface of the liquid storage box (22), a flow channel (26) is provided on the top of the L-shaped rotating plate (20), a liquid outlet end of the conduit (24) is fixedly connected to the inner wall of the flow channel (26), a through hole (2501) is penetrated through the circumferential outer surface of the drill sleeve (25), the liquid storage box (22) is connected to the through hole (2501) via the flow channel (26) and the conduit (24), and the through hole (2501) is connected to the interior of the drill sleeve (25).

6. A high-precision drilling device for a motorcycle crank according to claim 5, characterized in that: A limiting protrusion (2502) is provided on the circumferential outer surface of the drill sleeve (25), and a limiting sliding groove matching the limiting protrusion (2502) is provided on the inner wall of the L-shaped rotating plate (20) near the top end, and the limiting protrusion (2502) is slidably mounted on the inner wall of the limiting sliding groove.

7. The high-precision drilling device for a motorcycle crank according to claim 1, characterized in that: A tailstock (4) is arranged on the upper surface of the other end of the lathe body (1), a drilling machine (6) is arranged on the upper surface of the lathe body (1), and a spindle locking wrench (5) is arranged on the outer surface of the spindle box (2).

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