Milling cutter rotating speed adjusting mechanism

Abstract

The utility model belongs to the technical field of rotating speed adjustment, particularly relates to a milling cutter rotating speed adjusting mechanism, and provides the following scheme aiming at the problems that fine adjustment cannot be realized, a pause feeling can be generated, the gear is damaged and the service life of the mechanism is shortened due to the fact that rotating speed adjustment is realized through a gear in the prior art. A sealing cover is fixedly arranged at an opening in the top of the box body, an input shaft and an output shaft are respectively arranged in the box body, and the bottom end of the input shaft and the bottom end of the output shaft are rotatably connected with the inner wall of the bottom of the box body. The limiting assembly ensures the stability of the driven conical disc in the adjusting process and ensures the transmission reliability, the oiling assembly automatically oils the steel belt, sufficient lubrication of the steel belt in the operation process is ensured, the service life of the steel belt is prolonged, and the transmission efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of speed regulation, in particular to a milling cutter speed regulation mechanism. Background Art

[0002] A milling cutter is a rotating tool used for milling processing. It has one or more teeth. Usually, the milling cutter mainly moves in rotation, and the movement of the workpiece and the milling cutter is the feed motion. It can process planes, grooves, various curved surfaces, gears, etc. Planes, toothed parts, spiral surfaces and various curved surfaces can be processed on the milling machine. In addition, it can also be used for processing the surface of rotating bodies, inner holes and cutting.

[0003] After searching, the invention authorization with announcement number CN113146356B discloses a CNC milling cutter speed adjustment mechanism. The mechanism has the following disadvantages during use: the speed adjustment is achieved by meshing gears of different sizes, resulting in the inability to achieve fine-tuning, and there will be a sense of frustration. When the two gears are meshed during high-speed rotation, the gears will be damaged, reducing the service life of the mechanism. Adjusting the speed after shutdown will affect the working efficiency of the milling cutter. Therefore, we propose a milling cutter speed adjustment mechanism to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art that speed regulation through gears leads to inability to achieve fine-tuning and a sense of frustration, causes damage to the gears, and reduces the service life of the mechanism, and proposes a milling cutter speed regulation mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A milling cutter speed adjustment mechanism comprises a box body, a sealing cover is fixedly arranged at the top opening of the box body, an input shaft and an output shaft are respectively arranged inside the box body, the bottom ends of the input shaft and the output shaft are rotatably connected to the bottom inner wall of the box body, the top ends of the input shaft and the output shaft are rotatably connected to the bottom of the sealing cover, the top of the input shaft extends to the top of the sealing cover, a milling cutter is fixedly arranged at the bottom end of the output shaft, the bottom end of the output shaft extends to the bottom of the box body, the outer walls of the input shaft and the output shaft are fixedly sleeved with fixed cone disks, the input shaft and the output shaft are transmission-connected by a same steel belt, and the cross-section of the steel belt is trapezoidal,

[0007] Wherein, the outer wall sliding sleeve of the output shaft is provided with a driven cone disc, the steel belt is located between one of the fixed cone discs and the driven cone disc, the upper sliding sleeve of the input shaft is provided with a driving cone disc, and the steel belt is located between the other fixed cone disc and the driving cone disc;

[0008] The agency also includes:

[0009] Adjusting assembly, which is arranged on the input shaft and used to adjust the rotational speed between the input shaft and the output shaft;

[0010] Limiting assembly, which is arranged on the output shaft and used to cooperate with the adjusting assembly to limit the driven cone disk after the rotational speed is adjusted;

[0011] Oil coating assembly, which is arranged inside the box body and used to apply oil to the steel belt.

[0012] In a possible design, the adjusting assembly includes a limiting ring. A groove is formed on the outer wall of the driving cone disk. The limiting ring is rotatably connected to the inside of the groove. A rack is fixedly arranged on the outer wall of the limiting ring. An installation opening is formed on one side of the box body. A protective box is fixedly arranged in the installation opening. The rack penetrates through the protective box and is slidably connected to the protective box. A spur gear is rotatably connected inside the protective box. The spur gear meshes with the rack.

[0013] In a possible design, worm gears are rotatably connected to the inner walls on both sides of the protective box. The worm gears are located below the spur gear. A worm wheel is coaxially fixed to one side of the spur gear. The worm wheel is meshed with the worm gear. One end of the worm gear extends to the outside of the protective box and is provided with a crank.

[0014] In a possible design, a limiting rod is fixedly arranged on the inner wall of the bottom of the box body. The limiting rod penetrates through the limiting ring and is slidably connected to the limiting ring.

[0015] In a possible design, limiting blocks are arranged at both the top and the bottom of the rack and are used to prevent the rack from disengaging from the protective box.

[0016] In a possible design, the limiting assembly includes a limiting cylinder. The limiting cylinder is fixedly sleeved on the output shaft. The limiting cylinder is located above the driven cone disk. The inner diameter of the limiting cylinder is larger than the maximum diameter of the driven cone disk. The driven cone disk is slidably arranged inside the limiting cylinder. Four first springs are fixedly arranged at equal intervals on the top of the driven cone disk. The tops of the four first springs are fixedly connected to the inner wall of the top of the limiting cylinder.

[0017] In a possible design, the oiling assembly includes a fixed block fixedly arranged inside the box body. A chute is formed at the top of the fixed block. A slider is slidably connected inside the chute. The same fixed rod is fixedly arranged on the inner walls on both sides of the chute. The fixed rod penetrates through the slider and is slidably connected with the slider. Two support rods are symmetrically and fixedly arranged at the top of the slider. Sponge cylinders are rotatably connected to the outer walls of the two support rods. The same belt oil box is fixedly arranged at the tops of the two support rods. Oil guide grooves are formed at the tops of the two support rods. The oil inlets of the two oil guide grooves are communicated with the inside of the belt oil box, and the oil outlets of the two oil guide grooves are respectively communicated with the corresponding sponge cylinders. The steel belt passes through the two sponge cylinders and contacts the two sponge cylinders.

[0018] In a possible design, a second spring is sleeved on the fixed rod. The two ends of the second spring are respectively fixedly connected with the inner wall on one side of the chute and one side of the slider.

[0019] In this application, when it is necessary to adjust the rotation speed of the milling cutter, the worm is rotated by shaking the crank. The worm meshes with the worm wheel, and then drives the spur gear coaxial with the worm wheel to rotate. Through the meshing of the spur gear and the rack, the rack is driven to slide along the protection box. The rack is fixedly connected with the limiting ring. The limiting ring is rotatably connected with the groove on the driving cone disk. Therefore, the movement of the rack will drive the driving cone disk to slide along the input shaft, change the distance between the driving cone disk and the fixed cone disk, and thus change the contact radius between the steel belt with a trapezoidal cross-section and the driving cone disk and the fixed cone disk.

[0020] The limiting cylinder is fixedly sleeved on the output shaft and is located above the driven cone disk. Its inner diameter is larger than the maximum diameter of the driven cone disk, providing enough moving space for the driven cone disk. The top of the driven cone disk is connected with the inner wall of the top of the limiting cylinder through the first spring.

[0021] Since the steel belt bypasses the fixed cone disk, the driving cone disk and the driven cone disk, and the fixed cone disk at the same time, when the position of the driving cone disk changes, the radius between the driving cone disk and the fixed cone disk changes, the contact radius between the steel belt and the driving cone disk and the fixed cone disk changes, and the tension degree of the steel belt with unchanged length changes, so that the driven cone disk stably changes its position under the action of the first spring on it, thereby changing the contact radius between the steel belt and the driven cone disk and the fixed cone disk, and further adjusting the speed ratio between the input shaft and the output shaft to realize the adjustment of the rotation speed of the output shaft, and thus changing the rotation speed of the milling cutter on the output shaft.

[0022] The belt oil box in the oiling assembly stores lubricating oil. The lubricating oil is introduced into the two sponge cylinders through the oil guide grooves. The steel belt passes through the two sponge cylinders during operation, contacts the sponge cylinders and absorbs the lubricating oil to realize automatic oiling. The design of the sponge cylinders ensures the uniform application of the lubricating oil, avoids the waste and drying of the lubricating oil, and ensures the full lubrication of the steel belt. Beneficial effects

[0023] In the present utility model, for the milling cutter speed regulating mechanism, through the design of the adjusting component, the convenient adjustment of the rotational speed between the input shaft and the output shaft is realized, and the adjustment process is stable, and the continuous fine adjustment of the rotational speed can be achieved, improving the machining accuracy and efficiency;

[0024] In the present utility model, for the milling cutter speed regulating mechanism, the limiting component ensures the stability of the driven conical disk during the adjustment process, prevents the shaking or falling off caused by the change of the rotational speed, and ensures the reliability of the transmission;

[0025] In the present utility model, for the milling cutter speed regulating mechanism, the innovative design of the oiling component realizes the automatic oiling of the steel belt, ensures the sufficient lubrication of the steel belt during the operation process, prolongs the service life of the steel belt, and improves the transmission efficiency.

[0026] In the present utility model, the adjustment of the rotational speed between the input shaft and the output shaft is realized through the adjusting component, the continuous fine adjustment of the rotational speed is achieved, the machining accuracy and efficiency are improved, the limiting component ensures the stability of the driven conical disk during the adjustment process, the reliability of the transmission is ensured, the oiling component automatically oils the steel belt, ensures the sufficient lubrication of the steel belt during the operation process, prolongs the service life of the steel belt, and improves the transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a three-dimensional structural schematic diagram of a milling cutter speed regulating mechanism proposed by the present utility model;

[0028] Figure 2 is a three-dimensional exploded structural schematic diagram of a milling cutter speed regulating mechanism proposed by the present utility model;

[0029] Figure 3 is a three-dimensional structural schematic diagram of the output shaft of a milling cutter speed regulating mechanism proposed by the present utility model;

[0030] Figure 4 is a three-dimensional structural schematic diagram of the input shaft of a milling cutter speed regulating mechanism proposed by the present utility model;

[0031] Figure 5 is a three-dimensional structural schematic diagram of the fixing block of a milling cutter speed regulating mechanism proposed by the present utility model

[0032] Figure 6 is a three-dimensional structural schematic diagram of a partial cross-section of the support rod of a milling cutter speed regulating mechanism proposed by the present utility model.

[0033] In the figure: 1. Box body; 2. Sealing cover; 3. Input shaft; 4. Output shaft; 5. Steel belt; 6. Fixed conical disk; 7. Driven conical disk; 8. Limiting cylinder; 9. First spring; 10. Driving conical disk; 11. Limiting ring; 12. Limiting rod; 13. Rack; 14. Protection box; 15. Worm gear; 16. Worm; 17. Limiting block; 18. Fixed block; 19. Slide block; 20. Fixed rod; 21. Support rod; 22. Belt oil box; 23. Sponge cylinder; 24. Second spring; 25. Milling cutter. Specific implementation manner

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1:

[0035] Refer to Figures 1-6 , a speed regulation mechanism, including a box body 1, a sealing cover 2, an input shaft 3, an output shaft 4, a steel belt 5, a fixed conical disk 6, a driven conical disk 7, a driving conical disk 10, as well as a regulating component, a limiting component, an oiling component, etc.

[0036] The box body 1 is the main part of the entire mechanism. A sealing cover 2 is fixedly arranged at the top opening thereof to ensure the sealing performance inside the box body. The input shaft 3 and the output shaft 4 are respectively arranged inside the box body, and the two are connected by a steel belt 5 for transmission. The bottom ends of the input shaft 3 and the output shaft 4 are rotatably connected to the inner wall of the bottom of the box body 1, and the bottom ends of the input shaft 3 and the output shaft 4 are rotatably connected to the bottom of the sealing cover 2. Among them, the bottom end of the output shaft 4 extends to the bottom of the box body 1 and is fixedly provided with a milling cutter 25 by screws. Fixed conical disks 6 are respectively fixedly sleeved on the outer walls of the input shaft 3 and the output shaft 4 for cooperating with the steel belt 5 to transmit power.

[0037] The regulating component is used to regulate the speed ratio between the input shaft 3 and the output shaft 4. The driving conical disk 10 is slidably sleeved on the input shaft 3. A groove is provided on the outer wall of the input shaft 3, and a limiting ring 11 is rotatably connected in the groove. A rack 13 is provided on the outer wall of the limiting ring 11. The rack 13 penetrates through the protection box 14 and meshes with a spur gear inside the protection box 14. The protection box 14 is fixedly arranged on one side of the box body 1 and also internally provided with a worm 16 and a worm gear 15. The worm gear 15 is coaxially fixed with the spur gear, and the worm 16 is meshed with the worm gear 15.

[0038] The limiting component is used to limit the driven cone disk 7 after the speed adjustment is completed. Specifically, the limiting cylinder 8 is fixedly sleeved on the output shaft 4 and is located above the driven cone disk 7. The inner diameter of the limiting cylinder 8 is larger than the maximum diameter of the driven cone disk 7, ensuring that the driven cone disk 7 can slide inside it. Four first springs 9 are fixedly arranged at equal intervals on the top of the driven cone disk 7, and the top of the first springs 9 is fixedly connected to the inner wall of the top of the limiting cylinder 8, thereby providing a restoring force for the driven cone disk 7 during the adjustment process.

[0039] During use, by shaking the crank to drive the worm 16 to rotate, the worm gear 15 and the spur gear are further driven to rotate. The meshing of the spur gear and the rack 13 causes the limiting ring 11 and the driving cone disk 10 to move axially along the input shaft 3. Since the cross-section of the steel belt 5 is trapezoidal and the length is fixed, when the radius between the driving cone disk 10 and the fixed cone disk 6 changes, the contact radius of the steel belt 5 with the conical surfaces of the driving cone disk 10 and the fixed cone disk 6 changes. At the same time, the contact radius between the steel belt 5 and the driven cone disk 7 and the fixed cone disk 6 changes due to the tension of the steel belt 5. The driven cone disk 7 moves under the action of the first spring 9 on it as the contact radius of the steel belt 5 changes, completing the change of the contact radius between the steel belt 5 and the driven cone disk 7 and the fixed cone disk 6, and realizing the adjustment of the speed.

[0040] The oiling component is used to oil the steel belt 5 to extend its service life and reduce noise. Specifically, the oiling component includes a fixed block 18, a slider 19, a fixed rod 20, a support rod 21, a sponge cylinder 23 and a belt oil box 22. The fixed block 18 is fixedly arranged inside the box body 1, and the slider 19 is slidably connected in the chute opened on it. The fixed rod 20 penetrates through the slider 19 and is slidably connected with the slider 19, providing guidance and support for the slider 19. Two support rods 21 are symmetrically and fixedly arranged on the top of the slider 19, and sponge cylinders 23 are respectively rotatably connected to them. The belt oil box 22 is fixedly arranged on the top of the two support rods 21 and is communicated with the sponge cylinder 23 through an oil guiding groove, enabling the oil liquid to be evenly smeared on the steel belt 5.

[0041] This application can be used in the technical field of speed adjustment, and can also be used in other fields applicable to this application. Embodiment 2:

[0042] Reference Figures 4-6 , on the basis of Embodiment 1, an improvement is made: A milling cutter speed adjustment mechanism is applied to the technical field of speed adjustment. One end of the worm 16 extends to the outside of the protective box 14 and is provided with a crank for easy manual operation. A limiting rod 12 is also fixedly arranged on the inner wall of the bottom of the box body 1 for guiding and limiting the limiting ring 11. Limiting blocks 17 for preventing the rack 13 from disengaging from the protective box 14 are arranged at the top and bottom of the rack 13.

[0043] In addition, a second spring 24 is sleeved on the fixing rod 20 and is used to provide a restoring force when the slider 19 moves.

[0044] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A milling cutter speed adjustment mechanism, comprising a housing (1), a sealing cover (2) fixedly arranged at the top opening of the housing (1), an input shaft (3) and an output shaft (4) respectively arranged inside the housing (1), the bottom ends of the input shaft (3) and the output shaft (4) are both rotatably connected to the bottom inner wall of the housing (1), the top ends of the input shaft (3) and the output shaft (4) are both rotatably connected to the bottom of the sealing cover (2), the top end of the input shaft (3) extends to the top of the sealing cover (2), the bottom end of the output shaft (4) extends to the bottom of the housing (1), a milling cutter (25) is fixedly arranged at the bottom end of the output shaft (4), the outer walls of the input shaft (3) and the output shaft (4) are both fixedly sleeved with a fixed cone disk (6), the input shaft (3) and the output shaft (4) are transmission-connected by a same steel belt (5), and the cross-section of the steel belt (5) is trapezoidal. It is characterized in that The outer wall sliding sleeve of the output shaft (4) is provided with a driven cone disc (7), the steel belt (5) is located between one of the fixed cone discs (6) and the driven cone disc (7), the upper sliding sleeve of the input shaft (3) is provided with a driving cone disc (10), and the steel belt (5) is located between the other fixed cone disc (6) and the driving cone disc (10); The agency also includes: An adjusting component, the adjusting component is arranged on the input shaft (3) and is used to adjust the rotational speed between the input shaft (3) and the output shaft (4); A limit assembly, the limit assembly being arranged on the output shaft (4) and being used to limit the position of the driven cone disc (7) after the speed adjustment is completed in cooperation with the adjustment assembly; An oiling component is arranged inside the box body (1) and is used to oil the steel strip (5).

2. A milling cutter speed adjustment mechanism according to claim 1, characterized in that: The adjustment assembly comprises a limit ring (11), the outer wall of the active cone (10) is provided with a groove, the limit ring (11) is rotatably connected to the inside of the groove, a rack (13) is fixedly provided on the outer wall of the limit ring (11), a mounting opening is provided on one side of the box body (1), a protective box (14) is fixedly provided in the mounting opening, the rack (13) penetrates the protective box (14) and is slidably connected to the protective box (14), a spur gear is rotatably connected to the inside of the protective box (14), and the spur gear is meshed with the rack (13).

3. A milling cutter speed adjustment mechanism according to claim 2, characterized in that: The inner walls of both sides of the protection box (14) are rotatably connected to worms (16), the worms (16) are located below the spur gear, a worm wheel (15) is coaxially fixed to one side of the spur gear, the worm wheel (15) is meshingly connected to the worm (16), and one end of the worm (16) extends to the outside of the protection box (14) and is provided with a crank.

4. A milling cutter speed adjustment mechanism according to claim 2, characterized in that: A limiting rod (12) is fixedly disposed on the inner wall of the bottom of the box body (1), and the limiting rod (12) passes through the limiting ring (11) and is slidably connected to the limiting ring (11).

5. A milling cutter speed adjustment mechanism according to claim 4, characterized in that: The top and bottom of the rack (13) are both provided with limit blocks (17) for preventing the rack (13) from being disengaged from the protection box (14).

6. A milling cutter speed adjustment mechanism according to claim 1, characterized in that: The limiting assembly comprises a limiting cylinder (8), the limiting cylinder (8) being fixedly sleeved on the output shaft (4), the limiting cylinder (8) being located above the driven cone disc (7), the inner diameter of the limiting cylinder (8) being larger than the maximum diameter of the driven cone disc (7), the driven cone disc (7) being slidably arranged in the limiting cylinder (8), four first springs (9) being fixedly arranged at equal intervals on the top of the driven cone disc (7), the tops of the four first springs (9) being fixedly connected to the inner wall of the top of the limiting cylinder (8).

7. The milling cutter speed adjustment mechanism according to claim 1, characterized in that: The oiling assembly comprises a fixed block (18), the fixed block (18) being fixedly arranged inside the box body (1), a slide groove being provided on the top of the fixed block (18), a slider (19) being slidably connected in the slide groove, a same fixed rod (20) being fixedly arranged on the inner walls of both sides of the slide groove, the fixed rod (20) passing through the slider (19) and being slidably connected to the slider (19), two support rods (21) being symmetrically fixedly arranged on the top of the slider (19), the outer walls of the two support rods (21) being rotatably connected to a sponge cylinder (23), a same belt oil box (22) being fixedly arranged on the top of the two support rods (21), an oil guide groove being provided on the top of the two support rods (21), the oil inlets of the two oil guide grooves being connected to the inside of the belt oil box (22), the oil outlets of the two oil guide grooves being respectively connected to the corresponding sponge cylinders (23), and the steel belt (5) passing through the two sponge cylinders (23) and being in contact with the two sponge cylinders (23).

8. A milling cutter speed adjustment mechanism according to claim 7, characterized in that: A second spring (24) is sleeved on the fixed rod (20), and two ends of the second spring (24) are respectively fixedly connected to an inner wall of one side of the slide groove and one side of the slide block (19).

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