An automatic chamfering device for a toothed gear shaft

Abstract

The present invention relates to an automatic chamfering device for a toothed gear shaft, and is designed in the field of machine tool technology. The device comprises a frame, a centering clamping system and two flexible cutting systems. The centering clamping system comprises a centering clamping motor, two centering frames and two centering rotating devices. Each of the centering frames slides along the frame. The centering clamping motor is mounted on the frame. The centering clamping motor is transmission-connected to each of the centering frames. The two centering rotating devices are mounted on the centering frames. The two centering rotating devices are arranged opposite to each other. Each of the flexible cutting systems can be slidably mounted on the centering frames. Each of the flexible cutting systems has a cutting end, and can adapt to different gear chamfering requirements at a low cost.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, in particular to an automatic chamfering device for a toothed gear shaft. Background Art

[0002] ‌ After the gear shaping or toothing process, sharp burrs will be formed on the gear end face of the toothed gear shaft. The tooth end of the gear shaft needs to be chamfered to improve its performance and appearance. Generally, an automatic gear chamfering machine or manual grinding is used.

[0003] The gear chamfering machine is a machine tool specially used for chamfering gears. The worktable can be fed in different amounts by CNC, and the tool feeding method can be selected as tool feeding or workpiece feeding according to needs. From the beginning of cutting, the workpiece can complete the chamfering of a part in one revolution.

[0004] The traditional manual grinding method has problems such as low processing efficiency and poor quality consistency, which affects the service life of the gear shaft and flight safety.

[0005] The existing automatic chamfering machines for gear shafts are highly dependent on programming and CNC machine tools, with high operating and debugging costs. They are not suitable for small batches and trial production of workpieces. Summary of the invention

[0006] In order to overcome the technical defects of the prior art, the present invention provides an automatic chamfering device for a toothed gear shaft, which can adapt to different gear chamfering requirements at a low cost.

[0007] The technical solution adopted by the present invention is: an automatic chamfering device for a toothed gear shaft, which is used to realize the chamfering of the gear shaft. The automatic chamfering device for a toothed gear shaft includes a frame, a centering clamping system and two flexible cutting systems. The centering clamping system includes a centering clamping motor, two centering frames and two centering rotating devices. Each centering frame slides along the frame, the centering clamping motor is installed on the frame, the centering clamping motor is connected to each centering frame by transmission, the two centering rotating devices are installed on the centering frame, the two centering rotating devices are arranged relatively, and each centering frame slides along the frame. The flexible cutting system can be slidably installed on the centering frame, and each flexible cutting system has a cutting end, which is composed of a hollow tube. A friction wheel is sleeved on the outer side of the hollow tube, and both ends of the friction wheel are installed on the outer side of the hollow tube through a retaining spring. The hollow tube is connected to a pressure air pipe, and a cooling gap is formed between the friction wheel and the hollow tube. A cooling hole is provided on the retaining spring near the cutting end. When the rotation axis of the hollow tube does not coincide with the center line of the friction wheel, the friction wheel generates a traction force on the rotation of the gear shaft. The centering frame is provided with a damping spring sheet in contact with the gear shaft.

[0008] Preferably, the flexible cutting system includes a sliding cutting device and a flexible pressing device. The sliding cutting device is slidably mounted on the centering frame. The flexible pressing device is mounted on the centering frame. The flexible pressing device is in transmission connection with the sliding cutting device. The cutting end is located on the sliding cutting device. The acting direction of the flexible pressing device causes the flexible pressing device to have a tendency to move towards the centering rotary device.

[0009] Preferably, the sliding cutting device includes a sliding cutting frame, a cutting motor, a stabilizing cylinder, and a chamfering tool. The sliding cutting frame slides along the corresponding centering frame. The cutting motor and the stabilizing cylinder are both mounted on the sliding cutting frame. The chamfering tool is rotatably mounted in the stabilizing cylinder. The chamfering tool is mounted on the output end of the cutting motor. The cutting end is located on the chamfering tool. The chamfering tool is formed by a hollow tube. A rotary air supply ring is provided on the sliding cutting frame. The rotary air supply ring fits over the outside of the hollow tube. The hollow tube is communicated with the rotary air supply ring through a ventilation hole.

[0010] Preferably, the flexible pressing device is a tension spring. The two ends of the tension spring are respectively mounted on the centering frame and the sliding cutting frame.

[0011] Preferably, a screw rod is mounted on the output end of the centering clamping motor. The screw rod is in transmission connection with the two centering frames through a screw pair respectively. The transmission directions of the screw rod and the two centering frames are opposite.

[0012] Preferably, the mutually approaching positions of the centering frames have widened plates, and the widened plates are mutually fitted.

[0013] Preferably, dovetail groove sliders are provided on the centering frames. The centering frames and the machine frame are in transmission connection through a dovetail groove sliding pair.

[0014] Preferably, the centering rotary device includes a centering cone and a centering bearing. The centering bearing is mounted on the centering frame. The centering cone is rotatably mounted on the centering frame through the centering bearing. The two centering cones are arranged oppositely.

[0015] The beneficial effects of the present invention are:

[0016] The centering clamping system includes a centering clamping motor, two centering frames and two centering rotating devices. Each centering frame slides along the frame. The centering clamping motor is installed on the frame. The centering clamping motor is connected to each centering frame in a transmission manner. The two centering rotating devices are installed on the centering frame. The two centering rotating devices are arranged opposite to each other. The two centering rotating devices are used to clamp the gear shaft and drive the gear shaft to rotate. Each flexible cutting system can be slidably installed on the centering frame. Each flexible cutting system has a cutting end, which can be chamfered to adapt to the shape of the gear shaft. The cutting end is composed of a hollow tube. A friction wheel is sleeved on the outer side of the hollow tube. Both ends of the friction wheel are installed on the outer side of the hollow tube through a retaining spring. The friction wheel transmits the rotating power of the hollow tube to the friction wheel under the friction force of the retaining spring. The hollow tube is connected with a pressure air pipe. There is a pressure between the friction wheel and the hollow tube. A cooling gap is formed in the middle, and the pressure air pipe guides the cooling air flow into the cooling gap. A cooling hole is provided on the retaining ring near the cutting end. The cooling air flow in the cooling gap cools the friction wheel and is ejected from the cooling hole to the cutting end to protect the tool. When the rotation axis of the hollow tube does not coincide with the center line of the friction wheel, the friction wheel generates a traction force on the rotation of the gear shaft. When the rotation axis of the hollow tube does not coincide with the center line of the friction wheel, as the hollow tube rotates, the friction wheel always has a tendency to move in the direction close to the gear shaft, thereby maintaining the fit with the gear shaft and maintaining the friction force between the friction wheel and the gear shaft, so that the friction wheel continuously provides sufficient rotation driving force for the gear shaft. A damping spring in contact with the gear shaft is provided on the centering frame to prevent the gear shaft from rotating too fast and causing incomplete deburring, and can adapt to different gear chamfering requirements at a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the present invention after the frame is removed.

[0018] Figure 2 Schematic diagram of chamfering tool.

[0019] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 4 for Figure 2 Schematic diagram of the friction wheel position when A is not cut.

[0021] Figure 5 for Figure 2 Schematic diagram of A in the cutting state.

[0022] Figure 6 for Figure 3 An enlarged schematic diagram of point B.

[0023] Description of reference numerals:

[0024] 1. Centering clamping system; 11. Centering frame; 111. Damping spring; 12. Centering rotary device; 121. Centering cone; 13. Centering clamping motor;

[0025] 2. Flexible cutting system; 21. Sliding cutting device; 211. Sliding cutting frame; 2111. Rotating air supply ring; 212. Cutting motor; 213. Stabilizing cylinder; 214. Chamfering tool; 2141. Hollow tube; 2142. Friction wheel; 2143. Cooling seam; 2144. Cooling hole; 22. Flexible pressurizing device;

[0026] 3. Rack. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings:

[0028] like Figure 1 — Figure 5 As shown, this embodiment provides an automatic chamfering device for a toothed gear shaft, including a frame 3, a centering clamping system 1 and two flexible cutting systems 2, the centering clamping system 1 includes a centering clamping motor 13, two centering frames 11 and two centering rotating devices 12, each centering frame 11 slides along the frame 3, the centering clamping motor 13 is installed on the frame 3, the centering clamping motor 13 is connected to each centering frame 11 by transmission, the two centering rotating devices 12 are installed on the centering frames 11, the two centering rotating devices 12 are arranged opposite to each other, and the two centering rotating devices 12 are arranged opposite to each other. 12 is used to clamp the gear shaft and drive the gear shaft to rotate. Each flexible cutting system 2 can be slidably installed on the centering frame 11. Each flexible cutting system 2 has a cutting end, which is chamfered to adapt to the shape of the gear shaft. The cutting end is composed of a hollow tube 2141. The outer side of the hollow tube 2141 is sleeved with a friction wheel 2142. The two ends of the friction wheel 2142 are installed on the outer side of the hollow tube 2141 through a retaining spring. The friction wheel 2142 transmits the rotational power of the hollow tube 2141 to the friction wheel 2142 under the friction force of the retaining spring. The hollow tube 21 41 is connected with a pressure air pipe, and a cooling gap 2143 is formed between the friction wheel 2142 and the hollow tube 2141. The pressure air pipe guides the cooling airflow into the cooling gap 2143. A cooling hole 2144 is provided on the retaining ring near the cutting end. The cooling airflow in the cooling gap 2143 cools the friction wheel 2142 and is ejected from the cooling hole 2144 to the cutting end, thereby protecting the tool. When the rotation axis of the hollow tube 2141 does not coincide with the center line of the friction wheel 2142, the friction wheel 2142 generates a traction force on the rotation of the gear shaft. Please note that when the hollow tube When the rotation axis of 2141 does not coincide with the center line of the friction wheel 2142, as the hollow tube 2141 rotates, the friction wheel 2142 always tends to move towards the direction close to the gear shaft, thereby maintaining the fit with the gear shaft, maintaining the friction force between the friction wheel 2142 and the gear shaft, so that the friction wheel 2142 continuously provides sufficient rotational driving force for the gear shaft. A damping spring sheet 111 in contact with the gear shaft is provided on the centering frame 11 to prevent the gear shaft from rotating too fast and causing incomplete deburring, and can adapt to different gear chamfering requirements at a low cost.

[0029] Note that the friction wheel 2142 and the hollow tube 2141 acting as a cutting tool are designed separately. The friction wheel 2142 is convenient for replacement. In addition, since the rotational speed of the hollow tube 2141 is very high, the separate design of the friction wheel 2142 and the hollow tube 2141 is also convenient for reducing the rotational speed of the friction wheel 2142 to adapt to the rotational speed of the gear shaft.

[0030] Specifically, the flexible cutting system 2 includes a sliding cutting device 21 and a flexible pressing device 22. The sliding cutting device 21 is slidably installed on the centering frame 11, the flexible pressing device 22 is installed on the centering frame 11, the flexible pressing device 22 is in transmission connection with the sliding cutting device 21, the cutting end is located on the sliding cutting device 21, and the acting direction of the flexible pressing device 22 makes the flexible pressing device 22 have a tendency to move towards the centering and rotating device 12, so as to realize deburring and cutting of the edge of the gear shaft.

[0031] Specifically, the sliding cutting device 21 includes a sliding cutting frame 211, a cutting motor 212, a stabilizing cylinder 213 and a chamfering tool 214. The sliding cutting frame 211 slides along the corresponding centering frame 11. The cutting motor 212 and the stabilizing cylinder 213 are both installed on the sliding cutting frame 211. The chamfering tool 214 is rotatably installed in the stabilizing cylinder 213 to ensure the stability of the chamfering tool 214. The chamfering tool 214 is installed on the output end of the cutting motor 212. The chamfering tool 214 realizes chamfering under the drive of the cutting motor 212. The cutting end is located on the chamfering tool 214. The chamfering tool 214 is formed by a hollow tube 2141. A rotary air supply ring 2111 is provided on the sliding cutting frame 211. The rotary air supply ring 2111 is fitted and sleeved outside the hollow tube 2141. The hollow tube 2141 is communicated with the rotary air supply ring 2111 through a ventilation hole, so as to realize air supply.

[0032] Specifically, the flexible pressing device 22 is a tension spring. The two ends of the tension spring are respectively installed on the centering frame 11 and the sliding cutting frame 211, so as to generate the cutting pressure of the chamfering tool 214 on the gear shaft.

[0033] Specifically, a screw rod is installed at the output end of the centering clamping motor 13. The screw rod is in transmission connection with the two centering frames 11 through a thread pair respectively. The transmission directions of the screw rod and the two centering frames 11 are opposite, so as to realize the opening and closing of the two centering frames 11.

[0034] Specifically, the mutually approaching positions of the centering frames 11 have widened plates, and the widened plates are mutually fitted, so as to ensure the overall stability of the two centering frames 11.

[0035] Specifically, dovetail groove sliders are provided on the centering frames 11. The centering frames 11 and the machine frame 3 are in transmission connection through a dovetail groove sliding pair, so as to ensure the stable sliding of the two centering frames 11.

[0036] Specifically, the centering device 12 includes a centering cone 121 and a centering bearing. The centering bearing is installed on the centering frame 11, and the centering cone 121 is rotatably installed on the centering frame 11 through the centering bearing. The two centering cones 121 are arranged oppositely, thereby realizing the clamping and rotation of the gear shaft.

[0037] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. An automatic chamfering device for a toothed gear shaft, used to achieve gear shaft chamfering, characterized in that: The automatic chamfering device of the toothed gear shaft comprises a frame, a centering clamping system and two flexible cutting systems, the centering clamping system comprises a centering clamping motor, two centering frames and two centering rotating devices, each of the centering frames slides along the frame, the centering clamping motor is mounted on the frame, the centering clamping motor is connected to each centering frame in a transmission manner, the two centering rotating devices are mounted on the centering frame, the two centering rotating devices are arranged oppositely, each of the flexible cutting systems can be slidably mounted on the centering frame, each of the flexible cutting systems has a cutting end, the cutting end is composed of a hollow tube, the outer side of the hollow tube is sleeved with a friction wheel, the two ends of the friction wheel are mounted on the outer side of the hollow tube through a retaining spring, the hollow tube is connected with a pressure air pipe, a cooling gap is formed between the friction wheel and the hollow tube, a cooling hole is provided on the retaining spring near the cutting end, when the rotation axis of the hollow tube does not coincide with the center line of the friction wheel, the friction wheel generates a traction force for rotating the gear shaft, and a damping spring sheet in contact with the gear shaft is provided on the centering frame.

2. The automatic chamfering device for a toothed gear shaft according to claim 1, characterized in that: The flexible cutting system includes a sliding cutting device and a flexible pressurizing device. The sliding cutting device can be slidably installed on the centering frame, and the flexible pressurizing device is installed on the centering frame. The flexible pressurizing device is transmission-connected to the sliding cutting device. The cutting end is located on the sliding cutting device. The action direction of the flexible pressurizing device makes the flexible pressurizing device tend to move toward the centering rotating device.

3. The automatic chamfering device for a toothed gear shaft according to claim 2, characterized in that: The sliding cutting device includes a sliding cutting frame, a cutting motor, a stabilizing cylinder and a chamfering tool. The sliding cutting frame slides along the corresponding centering frame. The cutting motor and the stabilizing cylinder are both installed on the sliding cutting frame. The chamfering tool is rotatably installed in the stabilizing cylinder. The chamfering tool is installed on the output end of the cutting motor. The cutting end is located on the chamfering tool. The chamfering tool is formed as a hollow tube. A rotating air supply ring is provided on the sliding cutting frame. The rotating air supply ring is fittedly mounted outside the hollow tube. The hollow tube is connected to the rotating air supply ring through an air vent.

4. The automatic chamfering device for a toothed gear shaft according to claim 2, characterized in that: The flexible pressurizing device is a tension spring, and two ends of the tension spring are respectively installed on the centering frame and the sliding cutting frame.

5. The automatic chamfering device for a toothed gear shaft according to claim 1, characterized in that: A screw is installed at the output end of the centering clamping motor. The screw is respectively connected to the two centering frames through a thread pair. The transmission directions of the screw and the two centering frames are opposite.

6. The automatic chamfering device for a toothed gear shaft according to claim 1, characterized in that: The centering frames are provided with widening plates at positions close to each other, and the widening plates are interlocked with each other.

7. The automatic chamfering device for a toothed gear shaft according to claim 1, characterized in that: The centering frame is provided with a dovetail groove sliding block, and the centering frame and the frame are connected through a dovetail groove sliding pair.

8. The automatic chamfering device for a toothed gear shaft according to claim 1, characterized in that: The centering rotary device comprises a centering cone and a centering bearing. The centering bearing is mounted on a centering frame. The centering cone is rotatably mounted on the centering frame via the centering bearing. Two centering cones are arranged opposite to each other.

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