Worm gear machining and finishing device

Abstract

The utility model relates to the technical field of worm gear machining equipment, in particular to a worm gear machining and finishing device. The worm gear machining and finishing device comprises a rack. A loading mechanism used for carrying a worm gear to be machined is installed on the machine frame. The loading mechanism is provided with a clamping tool used for installing a worm gear to be machined. The clamping tool is mounted on the rack; the clamping tool is located between the tooth machining mechanism and the tooth trimming mechanism. The tooth machining mechanism used for conducting tooth machining on the worm wheel is provided with a cutter used for machining the worm wheel. The cutter is mounted on the first rotating shaft; the tooth trimming mechanism for trimming the turbine is provided with a second rotating shaft mounted on the rack; the second rotating shaft is sleeved with a worm used for conducting running-in and finishing on the worm gear to be machined. High maintenance or replacement cost needing to be returned to manufacturers due to gear loss is avoided, production cost is greatly reduced, worm gears with different sizes and different tooth numbers can be machined and trimmed through the device, and the application range is wide.

Description

Technical Field

[0001] This utility model relates to the field of worm gear processing equipment technology, and in particular to a worm gear processing and dressing device. Background Technology

[0002] In mechanical manufacturing enterprises, a large number of production equipment are required. These devices generally consist of power, transmission, control, and working parts. Among the transmission parts, the most common mechanical transmission mechanisms are gear drives, belt drives, chain drives, and worm gear drives. Worm gear drives are widely used in some mechanical equipment because they are equivalent to helical drives, which are multi-tooth meshing drives, resulting in smooth transmission, low noise, and some even have self-locking properties, making them suitable for use in speed reducers. However, their transmission efficiency is relatively low, and wear is more severe. In worm gear meshing drives, the relative sliding speed between the meshing teeth is high, resulting in high frictional losses and low efficiency. On the other hand, the high relative sliding speed also leads to severe tooth surface wear and significant heat generation.

[0003] Therefore, worm gear wear is extremely severe, requiring the availability of some intact spare parts for unforeseen circumstances. Damaged worm gears are sent to the manufacturer for repair. However, in actual operation, some worm gears may lack spare parts or have high repair costs. For example, some worm gears with slight tooth surface deformation need to be sent back to the manufacturer, resulting in significant losses in time and logistics costs. Furthermore, some damaged worm gears sent back to the manufacturer may be unrepairable and have to be scrapped. However, these scrapped worm gears can be reprocessed into smaller worm gears for reuse, reducing material costs. But repair shops usually send back new worm gears directly, increasing costs for enterprises. Therefore, there is an urgent need for a device that can repair and process worm gears to reduce production costs for enterprises. Utility Model Content

[0004] The purpose of this invention is to provide a worm gear processing and dressing device to solve the problems that worn worm gears cannot be repaired on-site and that worm gear materials cannot be reused.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A worm gear machining and dressing device includes a frame; a loading mechanism for transporting a worm gear to be machined is mounted on the frame; the loading mechanism has a clamping fixture for mounting the worm gear to be machined; the clamping fixture is mounted on the frame and can move left and right relative to the frame; the clamping fixture is located between a gear machining mechanism and a gear dressing mechanism; the gear machining mechanism for machining the worm gear has a cutting tool for machining the worm gear; the cutting tool is mounted on a first rotating shaft; the first rotating shaft is rotatably mounted on the frame; the gear dressing mechanism for dressing the worm gear has a second rotating shaft mounted on the frame; the second rotating shaft is arranged parallel to the first rotating shaft; a worm for running-in and dressing the worm gear to be machined is sleeved on the second rotating shaft; the loading mechanism, the gear machining mechanism, and the gear dressing mechanism work in coordination through a PLC controller.

[0007] The loading mechanism is also provided with ball bearings connected to the clamping fixture; the ball bearings are threadedly connected to the lead screw and slidably mounted on the frame, and the outer end of the lead screw is connected to the power output end of the first motor.

[0008] The clamping fixture has a base connected to a ball bearing; a turntable that can rotate relative to the base is mounted on the base; a second motor is provided corresponding to the turntable to drive its rotation; a vertical rod for mounting a worm gear to be processed is mounted on the turntable; the vertical rod is perpendicular to the turntable; the worm gear to be processed is sleeved on the vertical rod and locked by a locking nut.

[0009] A thrust ball bearing is provided between the worm gear to be processed and the turntable, and between the worm gear to be processed and the locking nut.

[0010] The base is equipped with a lifting assembly, which includes a bidirectional threaded rod, a slide, a lifting plate, rollers, and a support plate. The bidirectional threaded rod is rotatably installed in the base. The slide is threadedly connected to the bidirectional threaded rod and slidably installed in the base. The lifting plate is slidably installed in the base, and the moving direction of the lifting plate is perpendicular to that of the slide. The rollers are rotatably installed at the bottom of the lifting plate, and the rollers are adapted to the wedge-shaped surface at the top of the slide. The support plate is slidably installed in a groove in the base, and the bottom of the support plate abuts against the lifting plate.

[0011] A locking screw is provided between the base and the turntable.

[0012] This utility model proposes a worm gear processing and dressing device. The gear processing mechanism of the device can perform gear processing on the worm gear blank, and the gear dressing mechanism can perform gear repair and re-gear grinding on the worm gear, avoiding the high repair or replacement costs of sending the gear back to the manufacturer due to gear wear, greatly reducing production costs. Moreover, the device can process and dress worm gears of different sizes and different numbers of teeth, and has a wide range of applications. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a worm gear processing and dressing device according to the present invention.

[0014] Figure 2 This utility model Figure 1 A schematic diagram of the middle clamping fixture.

[0015] Figure 3 This utility model Figure 2 A schematic diagram of the clamping fixture with a thrust ball bearing.

[0016] Figure 4 This utility model Figure 1 A schematic diagram of the structure of a cutting tool.

[0017] Reference numerals: 1. Frame; 2. Loading mechanism; 21. First motor; 22. Lead screw; 23. Ball bearing; 24. Clamping fixture; 241. Base; 242. Second motor; 243. Turntable; 244. Vertical column; 245. Locking nut; 3. Gear machining mechanism; 31. Third motor; 32. First rotating shaft; 33. Cutting tool; 4. Gear dressing mechanism; 41. Fourth motor; 42. Second rotating shaft; 43. Worm gear; 5. Worm gear to be machined; 6. Lifting assembly; 61. Bidirectional threaded rod; 62. Slide; 63. Lifting plate; 64. Roller; 65. Support plate; 7. Locking screw; 8. Thrust ball bearing. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 As shown, a worm gear machining and dressing device includes a frame 1 and a loading mechanism 2, a gear machining mechanism 3 and a gear dressing mechanism 4 mounted on the frame 1. The working end of the loading mechanism 2 is located between the working end of the gear machining mechanism 3 and the working end of the gear dressing mechanism 4. The loading mechanism 2, the gear machining mechanism 3 and the gear dressing mechanism 4 work in coordination through a PLC controller.

[0025] This device has two operating modes:

[0026] Firstly, under the control of the PLC controller, the worm gear blank to be processed (new material formed by removing the tooth surface of a waste worm gear) is installed on the loading mechanism 2. The loading mechanism 2 sends the worm gear blank to the gear processing mechanism 3 for dimensional processing, and the tooth circumferential surface is processed along the circumferential surface of the worm gear blank. At this time, the size of the tooth circumferential surface may not be accurate enough or rough. Then the loading mechanism 2 sends the worm gear blank with the tooth circumferential surface to the gear dressing mechanism 4 for dressing and grinding.

[0027] Firstly, under the control of the PLC controller, the worm wheel to be processed (the tooth circumference surface of the worm wheel may be partially or entirely deformed, such as the tooth tilting or twisting or rough with burrs) is installed on the loading mechanism 2. The loading mechanism 2 directly sends the worm wheel blank with the tooth circumference surface to the tooth dressing mechanism 4 for dressing and grinding.

[0028] Regardless of the processing method, it can save companies production costs caused by equipment damage.

[0029] like Figure 2 , Figure 3 As shown, the loading mechanism 2 includes a first motor 21, a lead screw 22, a ball bearing 23, and a clamping fixture 24. The lead screw 22 is rotatably mounted inside the frame 1. The ball bearing 23 is threadedly connected to the lead screw 22 and slidably mounted on the frame 1. The clamping fixture 24 is connected to the ball bearing 23 and slidably mounted on the frame 1. The power output end of the first motor 21 is connected to the outer end of the lead screw 22.

[0030] When the first motor 21 drives the lead screw 22 to rotate, it moves the ball bearing 23 on the frame 1, thereby moving the clamping fixture 24 and the worm gear 5 on the clamping fixture 24 to the processing position of the gear processing mechanism 3 or the gear dressing mechanism 4.

[0031] The clamping fixture 24 is mounted on the frame 1, which has a rail groove for sliding and for the ball 23. In order to protect the rail groove from the influence of machining waste, a sliding rubber belt or corrugated plate is provided on the rail groove to act as a shield.

[0032] The clamping fixture 24 includes a base 241, a second motor 242, a turntable 243, a vertical rod 244, and a locking nut 245. The base 241 is connected to the ball bearing 23 and slidably mounted on the frame 1. The turntable 243 is rotatably mounted on the base 241. The second motor 242 is mounted inside the base 241, and the power output end of the second motor 242 is connected to the turntable 243 through a gear pair. The vertical rod 244 is vertically mounted on the turntable 243. A worm gear 5 is fitted on the vertical rod 244. The locking nut 245 is threaded onto the vertical rod 5 and presses the worm gear 5 with a pad.

[0033] The worm gear 5 is directly mounted on the upright 244 on the turntable 243, and the locking nut 245 is rotated on the upright 244 to press the worm gear 5, thus completing the clamping. After machining one tooth, the second motor 242 rotates at a certain angle (which can be controlled by the angle sensor and the PLC controller) to machine the next tooth.

[0034] A thrust ball bearing 8 is provided between the worm gear 5, the turntable 243, and the locking nut 245.

[0035] When it is necessary to use the gear dressing mechanism 4 to dress or break in the worm gear 5, a thrust ball bearing 8 needs to be installed between the worm gear 5 and the turntable 243 and the locking nut 245 to ensure that the worm gear 5 can rotate smoothly.

[0036] A lifting assembly 6 is provided inside the base 241. The lifting assembly 6 includes a bidirectional threaded rod 61, a slide 62, a lifting plate 63, a roller 64, and a support plate 65. The bidirectional threaded rod 61 is rotatably installed inside the base 241. The slide 62 is threadedly connected to the bidirectional threaded rod 61 and slidably installed inside the base 241. The lifting plate 63 is slidably installed inside the base 241, and the moving direction of the lifting plate 63 is perpendicular to that of the slide 62. The roller 64 is rotatably installed at the bottom of the lifting plate 63, and the roller 64 is adapted to the wedge-shaped surface at the top of the slide 62. The support plate 65 is slidably installed in the groove of the base 241, and the bottom of the support plate 65 abuts against the lifting plate 63.

[0037] When the worm gear 5 is too large (generally, its outer circumference exceeds the turntable 243 by a large margin), the use of the gear machining mechanism 3 (generally cutting downward relative to the worm gear 5) may cause deformation of the outer circumference of the worm gear 5. At this time, the bidirectional threaded rod 61 can be rotated to move the slide 62 in the opposite direction. The wedge-shaped surface on the slide 62 cooperates with the roller 64 at the bottom of the lifting plate 63 to lift the lifting plate 63, which in turn lifts the support plate 65 to support the outer edge of the worm gear 5 and prevent deformation under machining force.

[0038] Preferably, a locking screw 7 is provided between the base 241 and the turntable 243.

[0039] The locking screw 7 can lock the turntable 243 and the base 241 to prevent the second motor 242 from being subjected to force when the worm gear 5 is being adjusted or broken in by the gear dressing mechanism 4, and to prevent the second motor 242 from rotating in the opposite direction.

[0040] The gear processing mechanism 3 includes a third motor 31, a first rotating shaft 32, and a cutting tool 33. The first rotating shaft 32 is rotatably mounted on the frame 1. The power output end of the first motor 31 is connected to the first rotating shaft 32, and the cutting tool 33 is mounted on the first rotating shaft 32.

[0041] The third motor 31 drives the first rotating shaft 32 to rotate, causing the circular cutting tool 33 to cut downwards on the outer circumference of the worm gear 5, thereby machining the external teeth.

[0042] The gear dressing mechanism 4 includes a fourth motor 41, a second rotating shaft 42, and a worm gear 43. The second rotating shaft 42 is rotatably mounted on the frame 1. The power output end of the fourth motor 41 is connected to the second rotating shaft 42, and the worm gear 43 is mounted on the second rotating shaft 42.

[0043] The fourth motor 41 drives the second rotating shaft 42 to rotate, so that the worm 43, which is adapted to the outer circumference of the worm wheel 5, performs break-in and dressing on the worm wheel 5.

[0044] The structure of the PLC controller mentioned in this document is based on existing mature technology and will not be explained further.

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A worm gear machining and dressing device, comprising a frame; characterized in that: The frame is equipped with a loading mechanism for transporting the worm gear to be processed; the loading mechanism has a clamping fixture for mounting the worm gear to be processed; the clamping fixture is mounted on the frame and can move left and right relative to the frame; the clamping fixture is located between the gear processing mechanism and the gear dressing mechanism; the gear processing mechanism for processing the worm gear has a cutting tool for processing the worm gear; the cutting tool is mounted on a first rotating shaft; the first rotating shaft is rotatably mounted on the frame; the gear dressing mechanism for dressing the worm gear has a second rotating shaft mounted on the frame; the second rotating shaft is arranged parallel to the first rotating shaft; a worm for running-in and dressing the worm gear to be processed is sleeved on the second rotating shaft; the loading mechanism, the gear processing mechanism, and the gear dressing mechanism work in coordination through a PLC controller.

2. The worm gear machining and dressing device as described in claim 1, characterized in that: The loading mechanism is further provided with ball bearings connected to the clamping fixture; the ball bearings are threadedly connected to a lead screw and slidably mounted on the frame, the outer end of the lead screw being connected to the power output end of the first motor; the clamping fixture has a base connected to the ball bearings; a turntable rotatable relative to the base is mounted on the base; a second motor is provided corresponding to the turntable for driving its rotation; a vertical rod for mounting the worm gear to be processed is mounted on the turntable; the vertical rod is perpendicular to the turntable; the worm gear to be processed is sleeved on the vertical rod and locked by a locking nut.

3. The worm gear machining and dressing device as described in claim 2, characterized in that: A thrust ball bearing is provided between the worm gear to be processed and the turntable, and between the worm gear to be processed and the locking nut.

4. The worm gear machining and dressing device as described in claim 2, characterized in that: The base is equipped with a lifting assembly, which includes a bidirectional threaded rod, a slide, a lifting plate, rollers, and a support plate. The bidirectional threaded rod is rotatably installed in the base. The slide is threadedly connected to the bidirectional threaded rod and slidably installed in the base. The lifting plate is slidably installed in the base, and the moving direction of the lifting plate is perpendicular to that of the slide. The rollers are rotatably installed at the bottom of the lifting plate, and the rollers are adapted to the wedge-shaped surface at the top of the slide. The support plate is slidably installed in a groove in the base, and the bottom of the support plate abuts against the lifting plate.

5. The worm gear machining and dressing device as described in claim 2, characterized in that: A locking screw is provided between the base and the turntable.

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