Gear hobbing machine for gear shaft

Abstract

The invention relates to the field of gear hobbing machines, in particular to a gear shaft gear hobbing machine which comprises a base, a gear hobbing assembly, a positioning assembly and a plurality of spray guns, the base is provided with a machining cavity, the positioning assembly and the gear hobbing assembly are connected to the inner wall of the machining cavity at intervals, the multiple spray guns are connected to the inner wall of the machining cavity at intervals, and the liquid outlet ends of the spray guns face the gear shaft clamped by the positioning assembly. The oil liquid is sprayed on the surface of the gear shaft clamped by the positioning assembly through the liquid outlet end of the spray gun. Through the arrangement of the spray gun, a lubricating oil film is formed between the gear shaft and the machining end of the gear hobbing assembly, the friction coefficient is effectively reduced, the friction resistance between the gear shaft and the gear hobbing assembly is reduced, meanwhile, oil liquid makes full contact with the machining end of the gear shaft and the machining end of the gear hobbing assembly and conducts heat exchange, the oil liquid can effectively take away heat of a hob area, and the tooth surface temperature is reduced; and the gear surface thermal deformation or thermal cracks caused by high temperature are prevented, so that the machining quality of the gear shaft is improved, and the service life of the gear hobbing machine for the gear shaft is prolonged.

Description

Technical Field

[0001] The present application relates to the field of gear hobbing machines, and in particular to a gear hobbing machine for a gear shaft. Background Art

[0002] The gear hobbing machine processes gears according to the principle of generating method through the relative movement of the hob and the workpiece. The spiral tooth profile of the hob meshes with the involute tooth profile of the workpiece. When the hob rotates, it drives the workpiece to rotate, forming the tooth shape of the gear.

[0003] During the gear hobbing process, due to the high-speed relative motion between the hob and the gear shaft, a large amount of friction and cutting heat will be generated, causing wear between the hob and the gear shaft, reducing the processing quality of the gear shaft and shortening the service life of the gear hobbing machine. Summary of the invention

[0004] In order to improve the friction problem between the hob and the gear shaft, the present application provides a gear hobbing machine for the gear shaft.

[0005] The present application provides a gear hobbing machine for a gear shaft, which adopts the following technical solution: A gear hobbing machine for a gear shaft comprises a base, a gear hobbing assembly, a positioning assembly and a plurality of spray guns, wherein the base has a processing cavity, the positioning assembly and the gear hobbing assembly are connected at intervals on the inner wall of the processing cavity, the positioning assembly can clamp the gear shaft and drive the gear shaft to rotate, the gear hobbing assembly can perform gear hobbing processing on the tooth surface of the gear shaft clamped by the positioning assembly, and a plurality of the spray guns are connected at intervals on the inner wall of the processing cavity, the liquid outlet end of the spray gun faces the gear shaft clamped by the positioning assembly, and oil is sprayed on the surface of the gear shaft clamped by the positioning assembly through the liquid outlet end of the spray gun.

[0006] By adopting the above technical scheme, when the gear shaft needs to be processed, the clamping end of the positioning component coaxially clamps the end of the gear shaft, the hob end of the gear hobbing component abuts the tooth surface of the gear shaft clamped by the positioning component, and the positioning component drives the gear shaft to rotate along its own axis, so as to realize the precise processing of the gear shaft tooth surface by the gear hobbing component; at the same time, the liquid outlet ends of multiple spray guns are all facing the surface of the gear shaft clamped by the positioning component, and the oil is sprayed from the liquid outlet ends of the spray guns on the surface of the gear shaft and the processing end of the gear hobbing component, so that a layer of lubricating oil film is formed on the gear shaft and the processing end of the gear hobbing component, which effectively reduces the friction coefficient and reduces the friction resistance between the two. At the same time, the oil is in full contact with the gear shaft and the processing end of the gear hobbing component and performs heat exchange. The oil can effectively take away the heat from the hob area, reduce the tooth surface temperature, and prevent thermal deformation or thermal cracks of the tooth surface caused by high temperature, thereby improving the processing quality of the gear shaft and extending the service life of the gear hobbing machine for the gear shaft.

[0007] Optionally, the positioning assembly further includes a positioning base, a three-jaw chuck, a sliding seat, and a positioning rod. The positioning base is connected to the inner wall of the processing chamber. The three-jaw chuck is rotatably connected to the surface of the positioning base. The clamping end of the three-jaw chuck can clamp the end of the gear shaft to form a positioning. The sliding seat is slidably connected to the inner wall of the processing chamber. The sliding direction of the sliding seat is parallel to the rotation axis of the three-jaw chuck. The end of the positioning rod is rotatably connected to the surface of the sliding seat facing the three-jaw chuck. The rotation axis of the positioning rod coincides with the rotation axis of the three-jaw chuck. The end of the positioning rod protruding from the sliding seat can abut against the end face of the gear shaft clamped by the three-jaw chuck to form a positioning.

[0008] By adopting the above technical solution, when the gear shaft is fixed, the end of the gear shaft is driven to be embedded into the clamping end of the three-jaw chuck. The clamping end of the three-jaw chuck clamps the end of the gear shaft coaxially to form a fixation. At the same time, the sliding seat slides along the inner wall of the processing chamber towards the direction close to the positioning base. The end face of the positioning rod protruding from the sliding seat abuts against the end face of the gear shaft far from the three-jaw chuck coaxially. The clamping end of the three-jaw chuck and the rod face of the positioning rod clamp both ends of the gear shaft in the axial direction to form a positioning, so that the gear shaft is not prone to shift during the processing of the gear shaft by the hobbing assembly processing end, thereby improving the processing accuracy of the gear shaft.

[0009] Optionally, the positioning assembly includes a detection base, a cylinder, and a displacement probe. The detection base is connected to the inner wall of the processing chamber. The cylinder is connected to the surface of the detection base. The piston rod of the cylinder faces the clamping end of the three-jaw chuck. The displacement probe is connected to the end face of the piston rod of the cylinder. When the clamping end of the three-jaw chuck clamps the end of the gear shaft, the piston rod of the cylinder extends, and the detection end of the displacement probe abuts against the tooth surface of the gear shaft.

[0010] By adopting the above technical solution, when the three-jaw chuck clamps the end of the gear shaft, the piston rod of the cylinder extends, and the detection end of the displacement probe abuts against the tooth surface of the gear shaft. When the detection end of the displacement probe does not abut against the tooth surface of the gear shaft, the end of the gear shaft is driven to continue to be embedded in the clamping end of the three-jaw chuck until the detection end of the displacement probe abuts against the tooth surface of the gear shaft and then stops, realizing the precise correction of the position of the gear shaft on the three-jaw chuck, thereby improving the processing accuracy of the gear shaft.

[0011] Optionally, the hobbing assembly includes a power seat, a rotating seat, and a hob. The power seat is slidably connected to the inner wall of the processing chamber. The sliding direction of the power seat is perpendicular to the rotation axis of the three-jaw chuck. The rotating seat is rotatably connected to the surface of the power seat facing the three-jaw chuck. The rotation axis of the rotating seat is parallel to the sliding direction of the power seat. The hob is rotatably connected to the surface of the rotating seat. The rotation axis of the hob is perpendicular to the rotation axis of the rotating seat. The tooth surface of the hob can abut against the tooth surface of the gear shaft for hobbing processing.

[0012] By adopting the above technical solution, when the clamping end of the three-jaw chuck and the positioning rod surface clamp both ends of the gear shaft in the axial direction, the power seat slides along the inner wall of the processing cavity towards the three-jaw chuck, the cutter face of the hob abuts against the tooth surface of the gear shaft at the clamping end of the three-jaw chuck, driving the rotating seat to rotate, making the cutter face of the hob coincide with the tooth surface of the gear shaft, the hob rotates on the rotating seat, and the three-jaw chuck drives the gear shaft to rotate around its own axis, improving the accuracy of hobbing the tooth surface of the gear shaft by the cutter face of the hob.

[0013] Optionally, the base is connected with a circulating component, the circulating component includes a first pump body, an oil tank, a second pump body and a filter frame. The oil inlet end of the first pump body is communicated with the inner cavity of the oil tank through a pipeline, the oil outlet end of the first pump body is communicated with the oil inlet end of the spray gun, the first pump body drives the oil liquid in the oil tank to be sprayed out from the liquid outlet end of the spray gun. A return oil cavity is arranged on the bottom wall of the processing cavity, the filter frame is connected to the inner wall of the cavity opening of the return oil cavity facing the processing cavity, the oil liquid in the processing cavity enters the return oil cavity after being filtered by the filter frame, the oil inlet end of the second pump body is communicated with the return oil cavity through a pipeline, and the oil outlet end of the second pump body is communicated with the inner cavity of the oil tank through a pipeline, and the second pump body drives the oil liquid in the return oil cavity to enter the inner cavity of the oil tank.

[0014] By adopting the above technical solution, the first pump body drives the oil liquid in the oil tank to be sprayed out from the liquid outlet end of the spray gun, the oil liquid lubricates the tooth surface of the gear shaft and then flows towards the bottom wall of the processing cavity, the oil liquid on the bottom wall of the processing cavity enters the return oil cavity after being filtered by the filter frame, and the second pump body drives the oil liquid in the return oil cavity to flow back to the inner cavity of the oil tank, realizing the recycling of the oil liquid, reducing the waste of the oil liquid, and thus reflecting the concept of environmental protection.

[0015] Optionally, the circulating component further includes a closing plate and a thermal expansion and contraction strip. An oil discharge hole is formed in the inner wall of the return oil cavity, the oil discharge hole penetrates through the surface of the base, the oil inlet end of the second pump body is embedded in the oil discharge hole through a pipeline and communicated with the return oil cavity, an opening and closing cavity for the closing plate to slide is formed in the inner wall of the return oil cavity near the oil discharge hole, the plate surface of the closing plate abuts against the inner wall of the opening and closing cavity and separates the oil discharge hole and the return oil cavity, one end of the thermal expansion and contraction strip is connected to the plate surface of the closing plate, and the other end of the thermal expansion and contraction strip is connected to the inner wall of the opening and closing cavity. When the thermal expansion and contraction strip cools and contracts, it drives the closing plate away from the oil discharge hole, and the opening and closing cavity communicates the oil discharge hole and the return oil cavity.

[0016] By adopting the above technical solution, when the thermal expansion and contraction strip cools and contracts, it drives the closing plate to slide along the inner wall of the opening and closing cavity in a direction away from the oil discharge hole, the opening and closing cavity communicates the oil discharge hole and the return oil cavity, the oil liquid is in full contact with the gear shaft and heat exchange occurs, the heated oil liquid in the processing cavity enters the return oil cavity after being filtered by the filter frame, the oil liquid is in full contact with the thermal expansion and contraction strip and heat exchange occurs, the thermal expansion and contraction strip heats up and expands, driving the closing plate to slide along the inner wall of the opening and closing cavity in a direction close to the oil discharge hole, the plate surface of the closing plate abuts against the inner wall of the opening and closing cavity and separates the oil discharge hole and the return oil cavity, so that the oil liquid is cooled in the return oil cavity, thereby improving the quality of oil liquid recovery.

[0017] Optionally, the base is connected to a cooling component, which includes a power motor and a cooling impeller. The power motor is connected to the surface of the base, the axis of the power motor passes through the surface of the base and is located in the return oil chamber, and the cooling impeller is coaxially connected to the motor shaft of the power motor.

[0018] By adopting the above technical solution, when the oil accumulates in the oil return chamber, the power motor drives the cooling impeller to rotate, and the cooling impeller drives the oil in the oil return chamber to flow. The oil and air are fully in contact and heat exchange is carried out, thereby accelerating the cooling efficiency of the oil in the oil return chamber.

[0019] Optionally, the cooling component also includes a cooling piston, a reciprocating screw rod, multiple one-way valves and multiple one-way valves. A cooling chamber for the reciprocating screw rod to rotate is provided in the base, the axis of the reciprocating screw rod and the axis of the power motor are parallel to each other, the cooling piston is threadedly connected to the outer wall of the reciprocating screw rod, the cooling piston slides back and forth on the inner wall of the cooling chamber along the axis of the reciprocating screw rod, the bottom wall of the return oil chamber is provided with multiple air outlets, the air outlets are connected to the cooling chamber, the one-way valves are connected one by one to the inner walls of the air outlets, the one-way valves supply air in the cooling chamber to enter the return oil chamber from the air outlets, the surface of the base is provided with multiple air inlet holes, the air inlet holes are connected to the cooling chamber, the one-way valves are connected one by one to the inner walls of the air inlet holes, and the one-way valves supply outside air to enter the cooling chamber through the air inlet holes.

[0020] By adopting the above technical scheme, when the cooling piston slides back and forth on the inner wall of the cooling chamber along the axis of the reciprocating screw rod, the one-way valve 2 supplies external air to enter the cooling chamber through the air inlet hole, and the one-way valve 1 supplies air in the cooling chamber to enter the return oil chamber through the air outlet hole to fully contact with the oil and perform heat exchange, thereby further improving the cooling efficiency of the oil in the return oil chamber.

[0021] Optionally, the circulation component also includes a float, a connecting rod, a second reciprocating screw and a cleaning plate, the second reciprocating screw being rotatably connected to the inner wall of the processing chamber close to the filter frame, the axis of the second reciprocating screw and the axis of the first reciprocating screw are parallel to each other, the cleaning plate is threadedly connected to the outer peripheral surface of the second reciprocating screw, the cleaning plate slides back and forth on the inner wall of the processing chamber along the axis of the second reciprocating screw, the filter frame is slidably connected to the inner wall of the oil return chamber, the sliding direction of the filter frame and the sliding direction of the opening and closing plate are parallel to each other, one end of the connecting rod is connected to the end face of the filter frame facing the oil return chamber, and the other end of the connecting rod is connected to the float, when the float slides toward the processing chamber under the buoyancy of the oil in the oil return chamber, it drives the filter frame along the inner wall of the oil return chamber close to the cleaning plate, and the cleaning end of the cleaning plate abuts against the inner wall of the filter frame and scrapes off impurities on the inner wall of the filter frame.

[0022] By adopting the above technical solution, when the oil level in the oil return chamber continuously rises, the float slides towards the processing chamber under the influence of the buoyancy of the oil in the oil return chamber. The connecting rod receives the power of the float and drives the filter frame to slide along the inner wall of the oil return chamber towards the processing chamber. The cleaning end of the cleaning plate abuts against the inner wall of the filter frame and scrapes the impurities on the inner wall of the filter frame, realizing the directional cleaning of the impurities on the inner wall of the filter frame.

[0023] Optionally, the base is connected with an opening and closing component, which includes an elastic member, a rotating rod and a connecting rope. The rotating rod is rotatably connected to the inner wall of the oil return chamber. The axis of the rotating rod is perpendicular to the sliding direction of the opening and closing plate. The rotating rod is located between the float and the opening and closing plate. The elastic force of the elastic member is greater than the buoyancy force received by the float. One end of the elastic force direction of the elastic member is connected to the rotating shaft of the rotating rod, and the other end of the elastic force direction of the elastic member is connected to the inner wall of the oil return chamber. The elastic member has an elastic force to drive the rotating rod to rotate towards the float, and the rod surface of the rotating rod abuts against the surface of the float and limits the sliding trend of the float. One end of the connecting rope is connected to the plate surface of the opening and closing plate, and the other end of the connecting rope is connected to the end surface of the rotating rod away from the float. The connecting rope is in a taut state. When the opening and closing plate slides towards the oil discharge hole, the connecting rope receives the power of the opening and closing plate and drives the rotating rod to rotate away from the float, and the limiting effect of the rotating rod on the float disappears.

[0024] By adopting the above technical solution, when the thermal expansion and contraction strip expands due to temperature rise, it pushes the opening and closing plate to slide along the inner wall of the opening and closing chamber towards the oil discharge hole. The connecting rope receives the power of the opening and closing plate and drives the rotating rod to rotate away from the float, and the limiting effect of the rotating rod on the float disappears. The float slides towards the processing chamber under the buoyancy of the oil in the oil return chamber, driving the filter frame to slide along the inner wall of the oil return chamber towards the cleaning plate, realizing the directional sliding of the filter frame.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The setting of the spray gun forms a lubricating oil film between the gear shaft and the processing end of the hobbing assembly, effectively reducing the friction coefficient and the frictional resistance between the two. At the same time, the oil is in full contact with the gear shaft and the processing end of the hobbing assembly for heat exchange. The oil can effectively take away the heat in the hob area, reduce the tooth surface temperature, and prevent tooth surface thermal deformation or thermal cracks caused by high temperature, thereby improving the processing quality of the gear shaft and extending the service life of the hobbing machine for the gear shaft. 2. The setting of the positioning seat, three-jaw chuck, sliding seat and positioning rod. The clamping ends of the three-jaw chuck and the rod surface of the positioning rod clamp the two ends of the gear shaft in the axial direction to form a positioning, so that the gear shaft is not prone to deviation during the processing of the gear shaft by the processing end of the hobbing assembly, thereby improving the processing accuracy of the gear shaft. 3. Set up the detection seat, cylinder and displacement probe until the detection end of the displacement probe abuts against the tooth surface of the gear shaft and then stop, so as to accurately correct the position of the gear shaft on the three-jaw chuck, thereby improving the machining accuracy of the gear shaft. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the partial structure in the embodiment of the present application.

[0028] Figure 3 It is a partial sectional view in the embodiment of the present application, mainly showing the opening and closing assembly.

[0029] Figure 4 It is a partial sectional view in the embodiment of the present application, mainly showing the collection assembly.

[0030] Description of the reference numerals: 1, base; 11, processing chamber; 12, oil return chamber; 13, oil drain hole; 14, opening and closing chamber; 15, collection chamber; 16, cooling chamber; 17, air outlet hole; 18, air inlet hole; 2, hobbing assembly; 21, power seat; 22, rotating seat; 23, hob; 3, positioning assembly; 31, positioning seat; 32, three-jaw chuck; 33, sliding seat; 34, positioning rod; 35, detection seat; 36, cylinder; 37, displacement probe; 4, spray gun; 5, gear shaft; 6, circulation assembly; 61, pump body one; 62, fuel tank; 63, pump body two; 64, filter frame; 65, opening and closing plate; 66, thermal expansion and contraction strip; 67, float; 68, connecting rod; 69, reciprocating lead screw two; 610, cleaning plate; 7, collection assembly; 71, reset torsion spring; 72, collection plate; 73, collection frame; 8, cooling assembly; 81, power motor; 82, cooling impeller; 83, cooling piston; 84, reciprocating lead screw one; 85, synchronous pulley; 86, synchronous belt; 87, check valve one; 88, check valve two; 9, transmission assembly; 91, transmission wheel; 92, transmission belt; 10, opening and closing assembly; 101, elastic member; 102, rotating rod; 103, connecting rope. Detailed Description of the Embodiment

[0031] The following will further describe the present application in detail Figures 1 - 4 with reference to the attached drawings.

[0032] The embodiment of the present application discloses a hobbing machine for gear shafts. Refer to Figure 1, the hobbing machine for gear shafts includes a base 1, a hobbing assembly 2, a positioning assembly 3 and multiple spray guns 4. The bottom of the base 1 abuts against the ground to form a support. The surface of the base 1 has a machining cavity 11. The positioning assembly 3 and the hobbing assembly 2 are installed at intervals on the inner wall of the machining cavity 11. The positioning assembly 3 can clamp the end of the gear shaft 5 and drive the gear shaft 5 to rotate. The hobbing assembly 2 can perform hobbing on the tooth surface of the gear shaft 5 clamped by the positioning assembly 3. The multiple spray guns 4 are fixed to the bottom wall of the machining cavity 11 at intervals through bolts, and the oil outlet ends of the multiple spray guns 4 all face the clamping end of the positioning assembly 3. The oil is sprayed on the surface of the gear shaft 5 clamped by the clamping end of the positioning assembly 3 through the oil outlet ends of the spray guns 4, so as to form a lubricating oil film between the gear shaft 5 and the machining end of the hobbing assembly 2, effectively reducing the friction coefficient and reducing the frictional resistance between the two. At the same time, the oil is in full contact with the machining ends of the gear shaft 5 and the hobbing assembly 2 and conducts heat exchange. The oil can effectively take away the heat in the hob 23 area, reduce the tooth surface temperature, and prevent tooth surface thermal deformation or thermal cracks caused by high temperature, thereby improving the machining quality of the gear shaft 5 and extending the service life of the hobbing machine for gear shafts.

[0033] Refer to Figure 1 , the positioning assembly 3 includes a positioning seat 31, a three-jaw chuck 32, a sliding seat 33, a positioning rod 34, a detection seat 35, a cylinder 36 and a displacement probe 37. The positioning seat 31 is fixed to the inner wall of the machining cavity 11 through bolts. The three-jaw chuck 32 is rotatably connected to the surface of the positioning seat 31. The rotation axis of the three-jaw chuck 32 is parallel to the length direction of the base 1. The clamping end of the three-jaw chuck 32 can coaxially clamp the end of the gear shaft 5 to form a positioning. The sliding seat 33 is slidably connected to the inner wall of the machining cavity 11. The sliding direction of the sliding seat 33 is parallel to the rotation axis of the three-jaw chuck 32. The end of the positioning rod 34 is coaxially and rotatably connected to the end face of the sliding seat 33 facing the three-jaw chuck 32, and the rotation axis of the positioning rod 34 coincides with the rotation axis of the three-jaw chuck 32. When the clamping end of the three-jaw chuck 32 coaxially clamps the end of the gear shaft 5, the sliding seat 33 slides along the inner wall of the machining cavity 11 towards the direction close to the three-jaw chuck 32, and the end face of the positioning rod 34 protruding from the sliding seat 33 abuts against the end face of the gear shaft 5 in the axial direction away from the three-jaw chuck 32 to form a positioning. The clamping end of the three-jaw chuck 32 and the rod surface of the positioning rod 34 clamp both ends of the gear shaft 5 in the axial direction to form a fixation, so that the gear shaft 5 is not prone to deviation during the machining process, thereby improving the machining accuracy of the gear shaft 5.

[0034] Refer to Figure 1, the detection seat 35 is fixed to the inner wall of the processing chamber 11 by bolts, the air cylinder 36 is fixed to the surface of the detection seat 35 by bolts, the piston rod of the air cylinder 36 faces the clamping end of the three-jaw chuck 32, and the displacement probe 37 is fixed to the end face of the piston rod of the air cylinder 36 by bolts; when the end of the gear shaft 5 is embedded into the clamping end of the three-jaw chuck 32, the piston rod of the air cylinder 36 extends, and the displacement probe 37 approaches the gear shaft 5. When the detection end of the displacement probe 37 does not abut against the tooth surface of the gear shaft 5, the gear shaft 5 is pushed to continue to be embedded into the clamping end of the three-jaw chuck 32 until the detection end of the displacement probe 37 abuts against the tooth surface of the gear shaft 5 and then stops, thereby further improving the positioning accuracy of the gear shaft 5 on the clamping end of the three-jaw chuck 32.

[0035] Refer to Figure 1 , the hobbing assembly 2 includes a power seat 21, a rotating seat 22 and a hob 23. The power seat 21 is slidably connected to the inner wall of the processing chamber 11, the sliding direction of the power seat 21 is parallel to the width direction of the base 1, the rotating seat 22 is rotatably connected to the surface of the power seat 21 facing the three-jaw chuck 32, the rotation axis of the rotating seat 22 is parallel to the sliding direction of the power seat 21, and the two ends of the hob 23 in the axial direction are rotatably connected to the surface of the rotating seat 22 in a one-to-one correspondence, and the rotation axis of the hob 23 is perpendicular to the rotation axis of the rotating seat 22.

[0036] Refer to Figure 1 , when the clamping end of the three-jaw chuck 32 and the rod surface of the positioning rod 34 clamp the two ends of the gear shaft 5 in the axial direction, the power seat 21 slides along the inner wall of the processing chamber 11 towards the direction close to the three-jaw chuck 32, the tool surface of the hob 23 abuts against the tooth surface of the gear shaft 5, driving the rotating seat 22 to rotate, so that the tool surface of the hob 23 matches the tooth surface of the gear shaft 5, and the hob 23 and the gear shaft 5 rotate around their respective axes, realizing the hobbing process of the tool surface of the hob 23 on the tooth surface of the gear shaft 5, thereby improving the processing accuracy of the gear shaft 5.

[0037] Refer to Figure 2 and Figure 3 , the base 1 is provided with a circulation assembly 6, and the circulation assembly 6 can realize the recycling of the oil liquid in the spray gun 4, reducing the waste of the oil liquid; the circulation assembly 6 includes a pump body 61, an oil tank 62, a pump body 63, a filter frame 64, an opening and closing plate 65, a thermal expansion and contraction strip 66, a float 67, a connecting rod 68, a reciprocating lead screw 69 and a cleaning plate 610. The inner cavity of the oil tank 62 stores the oil liquid. The oil inlet end of the pump body 61 is connected to the inner cavity of the oil tank 62 through a pipeline, and the oil outlet end of the pump body 61 is connected to the oil inlet end of the spray gun 4 through a pipeline. The pump body 61 drives the oil liquid in the oil tank 62 to be sprayed out from the oil outlet end of the spray gun 4. An oil return cavity 12 is opened on the bottom wall of the processing chamber 11. The filter frame 64 is slidably connected to the inner wall of the cavity opening of the oil return cavity 12 facing the processing chamber 11, and the sliding direction of the filter frame 64 is parallel to the height direction of the base 1. The oil liquid in the processing chamber 11 enters the oil return cavity 12 after being filtered by the filter frame 64, realizing the filtration of the oil liquid, thereby improving the recycling quality of the oil liquid.

[0038] Referring to Figure 2 and Figure 3

[0039] Referring to Figure 2 and Figure 3

[0038]

[0040] Referring to Figure 2 and Figure 3 Figure 2

[0041] Referring to Figure 3 and Figure 4, collecting components 7 are installed at both ends of the base 1 in the length direction. The collecting components 7 can collect impurities on the inner wall of the filtering frame 64. The collecting components 7 include a reset torsion spring 71, a collecting plate 72 and a collecting frame 73. Collecting cavities 15 for the collecting plate 72 to rotate are formed on the mutually opposite inner walls of the processing cavity 11. The rotation axis of the collecting plate 72 is parallel to the width direction of the base 1. The two collecting cavities 15 are located at both ends of the axis direction of the reciprocating lead screw two 69. The collecting cavities 15 penetrate the surface of the base 1. The collecting frame 73 is fixed to the surface of the base 1 by bolts. The opening of the collecting frame 73 is located directly below the collecting cavity 15. The inner cavity of the collecting frame 73 is for storing impurities. One end of the reset torsion spring 71 in the direction of its elastic force is connected to the rotating shaft of the collecting plate 72, and the other end of the reset torsion spring 71 in the direction of its elastic force is connected to the inner wall of the collecting cavity 15. The reset torsion spring 71 has an elastic force to drive the collecting plate 72 to rotate towards the direction close to the processing cavity 11, and there is a tendency for the outer peripheral surface of the collecting plate 72 to abut against the inner wall of the collecting cavity 15 and close the collecting cavity 15.

[0042] Refer to Figure 3 and Figure 4 , when the cleaning plate 610 slides along the axis of the reciprocating lead screw towards the direction close to one of the collecting cavities 15, the cleaning end of the cleaning plate 610 abuts against the plate surface of the collecting plate 72 and pushes the collecting plate 72 to slide away from the processing cavity 11. The closing effect of the collecting plate 72 on the collecting cavity 15 disappears. The cleaning end of the cleaning plate 610 pushes the impurities in the filtering frame 64 to enter the inner cavity of the collecting frame 73 through the collecting cavity 15, realizing the collection of impurities in the filtering frame 64, thus facilitating the staff to clean the hobbing machine for gear shafts and improving the simplicity of using the hobbing machine for gear shafts.

[0043] Refer to Figure 2 and Figure 3 , a temperature reduction component 8 is installed on the base 1. The temperature reduction component 8 can cool the oil liquid in the oil return cavity 12; the temperature reduction component 8 includes a power motor 81, a temperature reduction impeller 82, a temperature reduction piston 83, a reciprocating lead screw one 84, two synchronous pulleys 85, a synchronous belt 86 used in cooperation with the synchronous pulleys 85, a plurality of one-way valves one 87 and a plurality of one-way valves two 88. The power motor 81 is fixed to the surface of the base 1 by bolts. The motor axis of the power motor 81 penetrates the surface of the base 1 and is located in the oil return cavity 12. The motor axis of the power motor 81 is parallel to the length direction of the base 1. The temperature reduction impeller 82 is coaxially fixed to the motor shaft of the power motor 81. The power motor 81 drives the temperature reduction impeller 82 to rotate. The blades of the temperature reduction impeller 82 drive the oil liquid in the oil return cavity 12 to flow, so that the oil liquid is in full contact with the air and heat exchange occurs, improving the temperature reduction efficiency of the oil liquid in the oil return cavity 12.

[0044] Refer to Figure 2 and Figure 3, a cooling chamber 16 for the rotation of the first reciprocating lead screw 84 is provided in the base 1. The axis of the first reciprocating lead screw 84 and the axis of the power motor 81 are parallel to each other. The material of the cooling piston 83 can be rubber or silica gel. In the embodiment of the present application, the material of the cooling piston 83 is rubber, which has a certain deformation ability. The cooling piston 83 is threadedly connected to the outer peripheral surface of the first reciprocating lead screw 84. The outer peripheral surface of the cooling piston 83 abuts against the inner wall of the cooling chamber 16 to form a seal. The cooling piston 83 slides back and forth along the inner wall of the cooling chamber 16. The end of the first reciprocating lead screw 84 penetrates the surface of the base 1. One of the synchronous pulleys 85 is coaxially fixed to the end of the first reciprocating lead screw 84 protruding from the base 1, and the other synchronous pulley 85 is coaxially fixed to the motor shaft of the power motor 81. The timing belt 86 is tensioned to connect the two synchronous pulleys 85.

[0045] Refer to Figure 2 and Figure 3 , a plurality of air outlet holes 17 are spaced apart from the inner wall of the oil return chamber 12 close to the cooling chamber 16. The air outlet holes 17 communicate with the cooling chamber 16. The first one-way valves 87 are fixedly arranged on the inner walls of the air outlet holes 17 one by one. The first one-way valves 87 allow the air in the cooling chamber 16 to enter the oil return chamber 12 through the air outlet holes 17, so that the air fully contacts the oil in the oil return chamber 12 and performs heat exchange, thereby improving the cooling efficiency of the oil in the oil return chamber 12; a plurality of air inlet holes 18 are spaced apart from the surface of the base 1 close to the cooling chamber 16. The air inlet holes 18 communicate with the cooling chamber 16. The second one-way valves 88 are installed on the inner walls of the air inlet holes 18 one by one. The second one-way valves 88 allow the outside air to enter the cooling chamber 16 through the air inlet holes 18, realizing the stable supply of air in the cooling chamber 16.

[0046] Refer to Figure 2 and Figure 4 , the end of the second reciprocating lead screw 69 penetrates the surface of the base 1. A transmission assembly 9 is connected between the second reciprocating lead screw 69 and the power motor 81. The transmission assembly 9 can receive the power of the power motor 81 and drive the second reciprocating lead screw 69 to rotate. The transmission assembly 9 includes two transmission wheels 91 and a transmission belt 92 used in combination with the transmission wheels 91. One of the transmission wheels 91 is coaxially fixed to the end of the second reciprocating lead screw 69 protruding from the base 1, and the other transmission wheel 91 is coaxially fixed to the motor shaft of the power motor 81. The transmission belt 92 is tensioned to connect the two transmission wheels 91, eliminating the need for an external power device to drive the second reciprocating lead screw 69 to rotate, reducing energy consumption, and thus reflecting the concept of energy conservation.

[0047] Refer to Figure 2 and Figure 3, a base 1 is installed with an opening and closing component 10, and the opening and closing component 10 can limit the sliding of the float 67; the opening and closing component 10 includes an elastic member 101, a rotating rod 102 and a connecting rope 103. The rotating rod 102 is rotatably connected to the inner wall of the oil return chamber 12, and the rotation axis of the rotating rod 102 is parallel to the width direction of the base 1. The elastic member 101 can be a torsion spring or a tension spring. In the embodiment of the present application, the elastic member 101 is a torsion spring and has a certain deformation ability. The elastic force of the elastic member 101 is greater than the buoyancy force received by the float 67. One end in the direction of the elastic force of the elastic member 101 is connected to the inner wall of the oil return chamber 12, and the other end in the direction of the elastic force of the elastic member 101 is connected to the rotating shaft of the rotating rod 102. The elastic member 101 has an elastic force to drive the rotating rod 102 to rotate towards the direction close to the float 67, and the rod surface of the rotating rod 102 abuts against the surface of the float 67 and limits the tendency of the float 67 to slide.

[0048] Refer to Figure 2 and Figure 3 , one end of the connecting rope 103 is connected to the plate surface of the opening and closing plate 65, and the other end of the connecting rope 103 is connected to the end surface of the rotating rod 102 away from the float 67. The connecting rope 103 is in a taut state. When the thermal expansion and contraction strip 66 heats up and expands, the thermal expansion and contraction strip 66 drives the opening and closing plate 65 to slide along the inner wall of the opening and closing chamber 14 towards the direction close to the oil discharge hole 13. The plate surface of the opening and closing plate 65 abuts against the inner wall of the opening and closing chamber 14 and separates the oil discharge hole 13 and the oil return chamber 12. At the same time, the connecting rope 103 receives the power of the opening and closing plate 65 and drives the rotating rod 102 to rotate away from the float 67. The limiting effect of the rotating plate on the float 67 disappears, and the float 67 slides towards the direction close to the processing chamber 11 under the buoyancy of the oil in the oil return chamber 12, realizing the directional sliding of the float 67.

[0049] The implementation principle of a hobbing machine for a gear shaft in an embodiment of this application is as follows: When the end of the gear shaft 5 is inserted into the clamping end of the three-jaw chuck 32, the piston rod of the cylinder 36 extends, and the displacement probe 37 approaches the gear shaft 5. When the detection end of the displacement probe 37 does not abut against the tooth surface of the gear shaft 5, the gear shaft 5 is pushed to continue to be inserted into the clamping end of the three-jaw chuck 32 until the detection end of the displacement probe 37 abuts against the tooth surface of the gear shaft 5 and then stops, thereby further improving the positioning accuracy of the gear shaft 5 on the clamping end of the three-jaw chuck 32; at the same time, the sliding seat 33 slides along the inner wall of the machining cavity 11 towards the direction close to the three-jaw chuck 32, and the end face of the positioning rod 34 protruding from the sliding seat 33 abuts against the end face of the gear shaft 5 away from the three-jaw chuck 32 in the axial direction to form a positioning. The clamping end of the three-jaw chuck 32 and the rod surface of the positioning rod 34 clamp both ends of the gear shaft 5 in the axial direction to form a fixation, so that the gear shaft 5 is not prone to deviation during the machining process, thereby improving the machining accuracy of the gear shaft 5; the power seat 21 slides along the inner wall of the machining cavity 11 towards the direction close to the three-jaw chuck 32, the cutting face of the hob 23 abuts against the tooth surface of the gear shaft 5, driving the rotating seat 22 to rotate, so that the cutting face of the hob 23 matches the tooth surface of the gear shaft 5, and the hob 23 and the gear shaft 5 rotate around their respective axes, realizing the hobbing machining of the tooth surface of the gear shaft 5 by the cutting face of the hob 23, thereby improving the machining accuracy of the gear shaft 5; the oil liquid is sprayed on the surface of the gear shaft 5 clamped by the clamping end of the positioning assembly 3 through the oil outlet end of the spray gun 4, forming a lubricating oil film between the gear shaft 5 and the machining end of the hobbing assembly 2, effectively reducing the friction coefficient and reducing the frictional resistance between the two. At the same time, the oil liquid is in full contact with the gear shaft 5 and the machining end of the hobbing assembly 2 and conducts heat exchange. The oil liquid can effectively take away the heat in the area of the hob 23, reduce the tooth surface temperature, and prevent tooth surface thermal deformation or thermal cracks caused by high temperature, thereby improving the machining quality of the gear shaft 5 and extending the service life of the hobbing machine for the gear shaft.

[0050] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. Hobbing machine for gear shafts, characterized in that: It includes a base (1), a hobbing component (2), a positioning component (3) and a plurality of spray guns (4). The base (1) has a processing cavity (11). The positioning component (3) and the hobbing component (2) are connected to the inner wall of the processing cavity (11) at intervals. The positioning component (3) can clamp the gear shaft (5) and drive the gear shaft (5) to rotate. The hobbing component (2) can perform hobbing processing on the tooth surface of the gear shaft (5) clamped by the positioning component (3). The plurality of spray guns (4) are connected to the inner wall of the processing cavity (11) at intervals. The liquid outlet end of the spray gun (4) faces the gear shaft (5) clamped by the positioning component (3), and the oil liquid is sprayed on the surface of the gear shaft (5) clamped by the positioning component (3) through the liquid outlet end of the spray gun (4).

2. The hobbing machine for gear shafts according to claim 1, characterized in that: The positioning component (3) includes a positioning seat (31), a three-jaw chuck (32), a sliding seat (33) and a positioning rod (34). The positioning seat (31) is connected to the inner wall of the processing cavity (11). The three-jaw chuck (32) is rotatably connected to the surface of the positioning seat (31). The clamping end of the three-jaw chuck (32) can clamp the end of the gear shaft (5) to form a positioning. The sliding seat (33) is slidably connected to the inner wall of the processing cavity (11). The sliding direction of the sliding seat (33) is parallel to the rotation axis of the three-jaw chuck (32). The end of the positioning rod (34) is rotatably connected to the surface of the sliding seat (33) facing the three-jaw chuck (32). The rotation axis of the positioning rod (34) coincides with the rotation axis of the three-jaw chuck (32). The end of the positioning rod (34) protruding from the sliding seat (33) can abut against the end face of the gear shaft (5) clamped by the three-jaw chuck (32) to form a positioning.

3. The hobbing machine for a gear shaft according to claim 2, wherein: The positioning component (3) further includes a detection seat (35), a cylinder (36) and a displacement probe (37). The detection seat (35) is connected to the inner wall of the processing cavity (11). The cylinder (36) is connected to the surface of the detection seat (35). The piston rod of the cylinder (36) faces the clamping end of the three-jaw chuck (32). The displacement probe (37) is connected to the end face of the piston rod of the cylinder (36). When the clamping end of the three-jaw chuck (32) clamps the end of the gear shaft (5), the piston rod of the cylinder (36) extends, and the detection end of the displacement probe (37) abuts against the tooth surface of the gear shaft (5).

4. The hobbing machine for gear shafts according to claim 2, characterized in that: The hobbing component (2) includes a power seat (21), a rotating seat (22) and a hob (23). The power seat (21) is slidably connected to the inner wall of the processing cavity (11). The sliding direction of the power seat (21) is perpendicular to the rotation axis of the three-jaw chuck (32). The rotating seat (22) is rotatably connected to the surface of the power seat (21) facing the three-jaw chuck (32). The rotation axis of the rotating seat (22) is parallel to the sliding direction of the power seat (21). The hob (23) is rotatably connected to the surface of the rotating seat (22). The rotation axis of the hob (23) is perpendicular to the rotation axis of the rotating seat (22). The cutting face of the hob (23) can abut against the tooth surface of the gear shaft (5) to perform hobbing processing.

5. The hobbing machine for gear shafts according to claim 1, characterized in that: The base (1) is connected with a circulation component (6). The circulation component (6) includes a first pump body (61), an oil tank (62), a second pump body (63) and a filter frame (64). The oil inlet end of the first pump body (61) is communicated with the inner cavity of the oil tank (62) through a pipeline. The oil outlet end of the first pump body (61) is communicated with the oil inlet end of the spray gun (4). The first pump body (61) drives the oil liquid in the oil tank (62) to be sprayed out from the liquid outlet end of the spray gun (4). The bottom wall of the processing cavity (11) is provided with an oil return cavity (12). The filter frame (64) is connected to the inner wall of the cavity opening of the oil return cavity (12) facing the processing cavity (11). The oil liquid in the processing cavity (11) enters the oil return cavity (12) after being filtered by the filter frame (64). The oil inlet end of the second pump body (63) is communicated with the oil return cavity (12) through a pipeline. The oil outlet end of the second pump body (63) is communicated with the inner cavity of the oil tank (62) through a pipeline. The second pump body (63) drives the oil liquid in the oil return cavity (12) to enter the inner cavity of the oil tank (62).

6. The hobbing machine for gear shafts according to claim 5, characterized in that: The circulation component (6) further includes an opening and closing plate (65) and a thermal expansion and contraction strip (66). An oil discharge hole (13) is formed in the inner wall of the oil return cavity (12). The oil discharge hole (13) penetrates through the surface of the base (1). The oil inlet end of the second pump body (63) is embedded in the oil discharge hole (13) through a pipeline and communicated with the oil return cavity (12). An opening and closing cavity (14) for the opening and closing plate (65) to slide is formed in the inner wall of the oil return cavity (12) near the oil discharge hole (13). The plate surface of the opening and closing plate (65) abuts against the inner wall of the opening and closing cavity (14) and separates the oil discharge hole (13) from the oil return cavity (12). One end of the thermal expansion and contraction strip (66) is connected to the plate surface of the opening and closing plate (65), and the other end of the thermal expansion and contraction strip (66) is connected to the inner wall of the opening and closing cavity (14). When the thermal expansion and contraction strip (66) cools down and contracts, it drives the opening and closing plate (65) to move away from the oil discharge hole (13), and the opening and closing cavity (14) is communicated with the oil discharge hole (13) and the oil return cavity (12).

7. The hobbing machine for gear shafts according to claim 6, characterized in that: The base (1) is connected with a cooling component (8). The cooling component (8) includes a power motor (81) and a cooling impeller (82). The power motor (81) is connected to the surface of the base (1). The axis of the motor of the power motor (81) penetrates through the surface of the base (1) and is located in the oil return cavity (12). The cooling impeller (82) is coaxially connected to the motor shaft of the power motor (81).

8. The hobbing machine for gear shafts according to claim 7, characterized in that: The cooling component (8) further includes a cooling piston (83), a reciprocating lead screw one (84), a plurality of one-way valves one (87) and a plurality of one-way valves two (88). A cooling chamber (16) for the reciprocating lead screw one (84) to rotate is formed in the base (1). The axis of the reciprocating lead screw one (84) is parallel to the axis of the power motor (81). The cooling piston (83) is threadedly connected to the outer wall of the reciprocating lead screw one (84). The cooling piston (83) slides back and forth along the axis of the reciprocating lead screw one (84) on the inner wall of the cooling chamber (16). A plurality of air outlet holes (17) are formed in the bottom wall of the oil return chamber (12). The air outlet holes (17) communicate with the cooling chamber (16). The one-way valves one (87) are correspondingly connected to the inner walls of the air outlet holes (17). The one-way valves one (87) allow the air in the cooling chamber (16) to enter the oil return chamber (12) through the air outlet holes (17). A plurality of air inlet holes (18) are formed on the surface of the base (1). The air inlet holes (18) communicate with the cooling chamber (16). The one-way valves two (88) are correspondingly connected to the inner walls of the air inlet holes (18). The one-way valves two (88) allow the outside air to enter the cooling chamber (16) through the air inlet holes (18).

9. The hobbing machine for gear shafts according to claim 6, characterized in that: The circulating component (6) further includes a float (67), a connecting rod (68), a reciprocating lead screw two (69) and a cleaning plate (610). The reciprocating lead screw two (69) is rotatably connected to the inner wall of the processing chamber (11) close to the filter frame (64). The axis of the reciprocating lead screw two (69) is parallel to the axis of the reciprocating lead screw one (84). The cleaning plate (610) is threadedly connected to the outer peripheral surface of the reciprocating lead screw two (69). The cleaning plate (610) slides back and forth along the axis of the reciprocating lead screw two (69) on the inner wall of the processing chamber (11). The filter frame (64) is slidably connected to the inner wall of the oil return chamber (12). The sliding direction of the filter frame (64) is parallel to the sliding direction of the opening and closing plate (65). One end of the connecting rod (68) is connected to the end face of the filter frame (64) facing the oil return chamber (12). The other end of the connecting rod (68) is connected to the float (67). When the float (67) slides towards the processing chamber (11) under the buoyancy of the oil in the oil return chamber (12), it drives the filter frame (64) to approach the cleaning plate (610) along the inner wall of the oil return chamber (12). The cleaning end of the cleaning plate (610) abuts against the inner wall of the filter frame (64) and scrapes the impurities on the inner wall of the filter frame (64).

10. The hobbing machine for gear shafts according to claim 9, characterized in that: The base (1) is connected with an opening and closing assembly (10). The opening and closing assembly (10) includes an elastic member (101), a rotating rod (102) and a connecting rope (103). The rotating rod (102) is rotatably connected to the inner wall of the oil return chamber (12). The axis of the rotating rod (102) is perpendicular to the sliding direction of the opening and closing plate (65). The rotating rod (102) is located between the float (67) and the opening and closing plate (65). The elastic force of the elastic member (101) is greater than the buoyancy force received by the float (67). One end of the elastic member (101) in the direction of the elastic force is connected to the rotating shaft of the rotating rod (102), and the other end of the elastic member (101) in the direction of the elastic force is connected to the inner wall of the oil return chamber (12). The elastic member (101) has an elastic force to drive the rotating rod (102) to rotate towards the float (67), and the surface of the rotating rod (102) abuts against the surface of the float (67) to limit the tendency of the float (67) to slide. One end of the connecting rope (103) is connected to the plate surface of the opening and closing plate (65), and the other end of the connecting rope (103) is connected to the end surface of the rotating rod (102) away from the float (67). The connecting rope (103) is in a taut state. When the opening and closing plate (65) slides towards the oil discharge hole (13), the connecting rope (103) receives the power of the opening and closing plate (65) and drives the rotating rod (102) to rotate away from the float (67), and the limiting effect of the rotating rod (102) on the float (67) disappears.

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