A vertical gear hobbing machine

Abstract

This utility model relates to the field of gear hobbing machine technology, specifically disclosing a vertical gear hobbing machine, including a machine body, a protective cover, a hob, and a base frame. The base frame is installed inside the machine body, and a protective cover is provided on the outer surface of the machine body to isolate the processing area, prevent chips and coolant from splashing, and ensure operational safety. The machine body has a spindle structure for installing and driving the hob. The hob, as the core cutting tool, is installed on the spindle and can rotate at high speed under power drive to realize gear cutting of the workpiece. It also includes: a rod and a sleeve. The rod is fixed on the surface of the base frame and passes through the sleeve and is inserted into the inside of the machine body. The sleeve is fixedly connected to the hob. The base frame and the sleeve are locked by a fixing component. By setting a cross-shaped insertion structure between the rod and the sleeve, combined with the clamping and locking of the fixing component, the hob is quickly positioned, installed, and reliably fixed. At the same time, a support component provides adjustable auxiliary support at the bottom of the hob.

Description

Technical Field

[0001] This utility model relates to the field of gear hobbing machine technology, specifically a vertical gear hobbing machine. Background Technology

[0002] Gear hobbing machines are key equipment in the mechanical manufacturing field used to process spur gears, helical gears, worm gears, and other gears. They are widely used in industries such as automobiles, aerospace, and construction machinery. Among them, vertical gear hobbing machines are widely used in the mass production of medium and large gears due to their advantages such as convenient workpiece clamping, smooth chip removal, and small footprint. In vertical gear hobbing machines, the hob is the core cutting component, which is usually mounted on the spindle and performs generating motion with the workpiece under high-speed rotation to complete the cutting of the gear tooth profile.

[0003] With the increasing demands of modern manufacturing for gear precision, surface quality, and production efficiency, the operational stability of hobs under high-speed and deep-cutting conditions has become a key factor affecting machining quality. Traditional vertical hobbing machines often rely solely on the spindle system to support the hob, lacking external auxiliary positioning and support structures. This leads to vibration and wobble when the hob overhang is long, resulting in tooth profile errors, increased surface roughness, and even accelerated wear of the spindle bearings. Furthermore, hob replacement often requires complex disassembly and assembly procedures and special tools, resulting in low tool replacement efficiency and affecting the continuous production capacity of the equipment. Therefore, we propose a vertical hobbing machine. Utility Model Content

[0004] The purpose of this invention is to provide a vertical gear hobbing machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a vertical gear hobbing machine, comprising: a machine body, a protective cover, a hob, and a base frame. The base frame is installed inside the machine body, and a protective cover is provided on the outer surface of the machine body to isolate the processing area, prevent chips and coolant from splashing, and ensure operational safety. The machine body is provided with a spindle structure for installing and driving the hob. The hob, as the core cutting tool, is installed on the spindle and can rotate at high speed under power drive to realize gear cutting processing of the workpiece.

[0006] It also includes: a plug rod and a plug cylinder, wherein the plug rod is fixed to the surface of the base frame and the plug rod passes through the plug cylinder and is inserted into the interior of the machine body, and the plug cylinder is fixedly connected to the roller cutter;

[0007] A fixing component is disposed outside the insert. The fixing component includes a connecting bracket fixed to the surface of the base frame, and the base frame and the insert are locked together by the fixing component.

[0008] A support assembly is disposed above the connecting frame. The support assembly includes a ball bearing that presses against the bottom of the cutter. The cutter is supported by the support assembly, thereby improving structural rigidity and operational stability.

[0009] The insertion rod is designed in a "+" shape, and the inside of the insertion tube is provided with a limiting groove that cooperates with the insertion rod. The "+" shaped insertion achieves anti-rotation positioning, preventing the insertion tube from rotating circumferentially relative to the insertion rod, thereby improving the stability of the connection and the positioning accuracy.

[0010] The end face of the connecting frame is fixed to the surface of the base frame. The connecting frame is internally threaded with a screw, and the end face of the screw is rotatably connected to the surface of the fixed clamping plate. The fixed clamping plate presses against the surface of the insert. By rotating the screw, the fixed clamping plate is pushed to clamp the insert, realizing quick locking and unlocking, which facilitates the installation and disassembly of the equipment. The rotatable connection avoids damage to the screw due to bending moment.

[0011] The inner wall of the fixing clamp is fixed with protrusions made of rubber. The rubber protrusions increase the friction between the fixing clamp and the insert, which plays a role in anti-slip and buffering, protecting the contact surface and improving the locking reliability.

[0012] The support assembly further includes a cavity opened inside the connecting frame, and a plate is inserted inside the cavity. A fixing plate is fixed to the top of the plate, and a support block is fixed to the top of the fixing plate. A ball bearing is embedded inside the support block. This multi-level support path achieves the positioning of the support assembly through the cooperation of the cavity and the plate. The support block contacts the bottom of the machine body through the ball bearing, providing stable support and adapting to minor deviations, thus reducing stress concentration.

[0013] The bottom of the fixed plate is fixed with a connecting plate, and the internal thread of the connecting plate is connected with a bolt. The end face of the bolt is fixed with a pressure plate. By tightening the bolt, the pressure plate can press against the surface of the connecting frame, thereby locking and fixing the entire support assembly to prevent it from loosening under vibration. It also makes it easy to adjust the height of the fixed plate to accommodate various hobbing cutter sizes.

[0014] The pressure plate is pressed tightly against the surface of the connecting frame, and the pressure plate is made of rubber, which achieves a tight lock between the pressure plate and the surface of the connecting frame. The rubber pressure plate has good elasticity and anti-slip properties, and can fit tightly against the surface of the connecting frame, providing effective vibration reduction and anti-loosening effects, and ensuring the long-term stability and reliability of the support structure.

[0015] This utility model has at least the following beneficial effects:

[0016] By setting a cross-shaped insertion structure between the insert rod and the insert cylinder, and cooperating with the clamping and locking of the fixing components, the hob is quickly positioned, installed and reliably fixed. This structure is not only easy to operate and efficient to disassemble and assemble, which significantly improves the maintainability and tool changing efficiency of the equipment, but also effectively distributes the radial load of the spindle through the external support path, reduces the working stress of the spindle system and extends the service life of key components.

[0017] Meanwhile, the support assembly provides adjustable auxiliary support at the bottom of the hob. Its embedded ball makes point contact with the bottom of the hob, which can not only provide stable support and suppress cutting vibration, but also not interfere with the free rotation of the hob, ensuring a smooth machining process. Combined with the rubber bumps and pressure plates, it further enhances the clamping friction and anti-loosening performance, effectively absorbs vibration, and improves the stability of operation and machining accuracy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the body of this utility model;

[0020] Figure 3 This is a front view of the hobbing cutter of this utility model;

[0021] Figure 4 This is a partial structural cross-sectional view of the hobbing cutter of this utility model;

[0022] Figure 5 for Figure 4 Enlarged view of region A in the middle;

[0023] Figure 6 This is a top sectional view of a portion of the insert of this utility model.

[0024] In the diagram: 11. Body; 12. Protective cover; 13. Roller cutter; 14. Base frame; 21. Insert rod; 22. Insert cylinder; 3. Fixing assembly; 31. Fixing clamp; 32. Connecting frame; 33. Screw; 4. Support assembly; 41. Insertion cavity; 42. Insertion plate; 43. Fixing plate; 44. Support block; 45. Rotary ball; 51. Connecting plate; 52. Bolt; 53. Pressure plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] Please see Figures 1 to 6 This utility model provides a technical solution: a vertical gear hobbing machine, including: a machine body 11, a protective cover 12, a hob 13 and a base frame 14. The base frame 14 is installed inside the machine body 11. The protective cover 12 is provided on the outer surface of the machine body 11 to isolate the processing area, prevent chips and coolant from splashing, and ensure operational safety. The machine body 11 is provided with a spindle structure for installing and driving the hob 13. The hob 13, as the core cutting tool, is installed on the spindle and can rotate at high speed under power drive to realize gear cutting processing of the workpiece.

[0028] It also includes: a plug rod 21 and a plug tube 22. The plug rod 21 is fixed to the surface of the base frame 14, and the plug rod 21 passes through the plug tube 22 and is inserted into the inside of the machine body 11. The plug tube 22 is fixedly connected to the roller cutter 13.

[0029] This connection structure not only enables the rapid positioning and installation of the hob 13, but also distributes the force on the spindle through the external support path, significantly improving the operating stability of the hob 13 under high speed and large cutting depth conditions, and extending the service life of the spindle and bearings.

[0030] The fixing component 3 is disposed outside the insert 22. The fixing component 3 includes a connecting bracket 32 ​​fixed to the surface of the base frame 14. The fixing component 3 is used to lock the base frame 14 and the insert 22.

[0031] Support component 4 is disposed above the connecting frame 32. Support component 4 includes a ball bearing 45 that presses against the bottom of the cutter 13. The cutter 13 is supported by support component 4, thereby improving structural rigidity and operational stability.

[0032] The ball bearing 45 adopts a rolling contact design, which provides stable support without affecting the free rotation of the hob 13, avoiding the frictional resistance and jamming risk caused by traditional rigid support, and achieving the ideal state of "support without interference".

[0033] The insertion rod 21 is set in a "+" shape, and the inside of the insertion cylinder 22 is provided with a limiting groove that cooperates with the insertion rod 21. The anti-rotation positioning is achieved through the "+" shaped insertion, which prevents the insertion cylinder 22 from rotating circumferentially relative to the insertion rod 21, thereby improving the stability of the connection and the positioning accuracy.

[0034] The end face of the connecting frame 32 is fixed to the surface of the base frame 14. The internal thread of the connecting frame 32 is connected to the screw 33, and the end face of the screw 33 is rotatably connected to the surface of the fixed clamping plate 31. The fixed clamping plate 31 presses against the surface of the insert 22. By rotating the screw 33, the fixed clamping plate 31 is pushed to clamp the insert 22, realizing quick locking and unlocking, which facilitates the installation and disassembly of the equipment. The rotatable connection avoids damage to the screw 33 due to bending moment.

[0035] The inner wall of the fixing plate 31 is fixed with protrusions, and the protrusions are made of rubber. The rubber protrusions increase the friction between the fixing plate 31 and the insert 22, which plays a role in anti-slip and buffering, protecting the contact surface and improving the locking reliability.

[0036] When the hob cutter 13 needs to be installed, first place the hob cutter 13 above the base frame 14, so that the insertion rod 21 passes through the insertion cylinder 22 and is inserted into the limiting hole inside the machine body 11 to complete the initial positioning. Then, manually rotate the screw 33. The rotation of the screw 33 pushes the fixing plate 31 to move closer to the insertion cylinder 22 until the rubber protrusion on the inner wall of the fixing plate 31 tightly presses against the outer surface of the insertion cylinder 22 to achieve the locking operation. At this time, the hob cutter 13 is firmly fixed and can be put into normal processing.

[0037] The support assembly 4 also includes a cavity 41 opened inside the connecting frame 32, and a plate 42 is inserted inside the cavity 41. A fixing plate 43 is fixed to the top of the plate 42, and a support block 44 is fixed to the top of the fixing plate 43. A ball bearing 45 is embedded inside the support block 44. This multi-stage support path achieves the positioning of the support assembly 4 through the cooperation of the cavity 41 and the plate 42. The support block 44 contacts the bottom of the machine body 11 through the ball bearing 45, providing stable support and adapting to small deviations, reducing stress concentration. The design of the ball bearing 45 will not affect the rotation of the roller cutter 13. Through the design of two sets of support blocks 44, the roller cutter 13 is supported, making the rotation of the roller cutter 13 more stable.

[0038] Example 2

[0039] A connecting plate 51 is fixed to the bottom of the fixing plate 43, and a bolt 52 is threaded inside the connecting plate 51. A pressure plate 53 is fixed to the end face of the bolt 52. By tightening the bolt 52, the pressure plate 53 can press against the surface of the connecting frame 32, thereby locking and fixing the support assembly 4 as a whole, preventing it from loosening under vibration, and making it easy to adjust the height of the fixing plate 43 to adapt to various sizes of the hobbing cutter 13.

[0040] The pressure plate 53 presses tightly against the surface of the connecting frame 32. The pressure plate 53 is made of rubber, which achieves a tight lock between the pressure plate 53 and the surface of the connecting frame 32. The rubber pressure plate 53 has good elasticity and anti-slip properties, and can fit tightly against the surface of the connecting frame 32, providing effective vibration reduction and anti-loosening effects, and ensuring the long-term stability and reliability of the support structure.

[0041] When the height of the roller cutter 13 changes, such as when replacing it with a different specification, first rotate the bolt 52 to move the pressure plate 53 upward, releasing the pressure on the surface of the connecting frame 32. Then, manually move the fixing plate 43 vertically to slide the insert plate 42 within the insert cavity 41, adjusting the height of the support block 44 until the rotating ball 45 precisely abuts against the bottom of the roller cutter 13 and provides appropriate support. Finally, rotate the bolt 52 in the opposite direction to make the pressure plate 53 tightly press against the surface of the connecting frame 32 again, completing the relocking of the support assembly 4. This adjustment mechanism is simple to operate and precise in positioning, achieving adaptive height adjustment of the support assembly 4, ensuring that roller cutters of different sizes can obtain optimal auxiliary support and maximizing their vibration reduction and stabilization effects.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical gear hobbing machine comprising: The machine body, protective cover, hob, and base frame are provided. The base frame is installed inside the machine body, and a protective cover is provided on the outer surface of the machine body. The machine body is equipped with a spindle structure for installing and driving the hob. The hob, as the core cutting tool, is installed on the spindle and can rotate at high speed under power drive to realize gear cutting of the workpiece. The feature is that it further includes: a plug rod and a plug cylinder, wherein the plug rod is fixed to the surface of the base frame, and the plug rod passes through the plug cylinder and is inserted into the interior of the machine body, and the plug cylinder is fixedly connected to the roller cutter; A fixing component is disposed outside the insert. The fixing component includes a connecting bracket fixed to the surface of the base frame, and the base frame and the insert are locked together by the fixing component. A support assembly is disposed above the connecting frame. The support assembly includes a ball bearing that presses against the bottom of the hob, thereby supporting the hob.

2. The vertical gear hobbing machine according to claim 1, characterized in that: The insertion rod is configured in a "+" shape, and the inside of the insertion tube is provided with a limiting groove that cooperates with the insertion rod.

3. The vertical gear hobbing machine according to claim 1, characterized in that: The end face of the connecting frame is fixed to the surface of the base frame. The connecting frame is internally threaded with a screw, and the end face of the screw is rotatably connected to the surface of the fixing clamp. The fixing clamp presses against the surface of the insert.

4. The vertical gear hobbing machine according to claim 3, characterized in that: The inner wall of the fixing plate is fixed with protrusions, and the protrusions are made of rubber.

5. The vertical gear hobber of claim 1, wherein: The support assembly also includes a cavity opened inside the connecting frame, and a plate is inserted inside the cavity. A fixing plate is fixed to the top of the plate, and a support block is fixed to the top of the fixing plate. A rotating ball is embedded inside the support block.

6. The vertical gear hobber of claim 5, wherein: A connecting plate is fixed to the bottom of the fixing plate, and a bolt is threaded inside the connecting plate. A pressure plate is fixed to the end face of the bolt.

7. The vertical gear hobber of claim 6, wherein: The pressure plate presses tightly against the surface of the connecting frame, and the pressure plate is made of rubber, so as to achieve a tight lock between the pressure plate and the surface of the connecting frame.

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