Automobile driving shaft besides-star wheel spline machining device

Abstract

The invention relates to the technical field of besides-star wheel spline machining, and discloses an automobile driving shaft besides-star wheel spline machining device which comprises a base table, a fixing device and a cutting device are arranged on the base table, a sliding ejector rod and a fixed ejector rod are arranged on the left side and the right side of the fixing device correspondingly, and a rotary chuck is arranged at the end, close to the fixed ejector rod, of the sliding ejector rod. The rotary chuck comprises a movable rod and a clamping body, one end of the movable rod is rotationally connected to the end of the sliding ejector rod, the other end of the movable rod is slidably connected to the middle axis of the clamping body, an inner clamping wheel is arranged at the end, away from the movable rod, of the clamping body, a plurality of ball channels are formed in the inner clamping wheel, and balls are arranged in the ball channels. A sliding groove is further formed in the position, close to the middle shaft of the clamping body, of the ball channel, bosses are arranged on the outer side of the movable rod, a front inclined face is arranged on the front side of each boss, and the front inclined faces are used for ejecting the balls outwards, so that the balls abut against the interior of the roller path to complete fixing of the concentric shell. The device has the advantages that the besides-star wheel is accurately and conveniently fixed, and the machining cost is low.

Description

Technical Field

[0001] The present invention relates to the technical field of outer star wheel spline machining, and specifically to a machining device for the outer star wheel spline of an automotive drive shaft. Background Art

[0002] In the field of automobile manufacturing, as a key component, the machining accuracy of the spline of the outer star wheel of the drive shaft is directly related to the transmission performance and overall reliability of the drive shaft. The accuracy of the spline affects the smoothness of power transmission and the fit degree between components. Therefore, the machining of the outer star wheel spline has always been the focus and difficulty in the production process of automotive parts.

[0003] Traditional devices for machining the spline of the outer star wheel of an automotive drive shaft mostly operate based on a combination of mechanical transmission and cutting machining. Commonly, a conventional machine tool is used. With a rotating cutting tool, driven by a motor, the tool moves along a predefined path to cut the spline tooth grooves on the outer star wheel blank. During the machining process, the workpiece needs to be fixed to the machine tool table by a fixture. The operator adjusts the position and clamping force of the fixture based on experience to ensure that the outer star wheel is in a proper position relative to the tool during machining. At the same time, the feed system of the machine tool controls the tool to gradually cut into the blank according to a preset program or manual operation, gradually carving out the spline shape.

[0004] By analyzing an outer star wheel keyway milling device with the publication number CN118106772A and an outer star wheel positioning tooling with the publication number CN202411075136.9, we found the following defects in the prior art: It is difficult to fix the outer star wheel, and the accuracy in fixing the outer star wheel in the prior art is poor. Ordinary fixtures are difficult to precisely fit the complex outer contour of the outer star wheel. The surface of the outer star wheel is irregular, and there are also significant subtle differences between products of different batches. Conventional fixtures cannot fit tightly and comprehensively, resulting in slight displacement of the outer star wheel during machining. Once displacement occurs, the cut spline tooth shape and tooth pitch will deviate from the design standard, seriously affecting the meshing effect between the spline and other transmission components, reducing the transmission efficiency of the drive shaft, and may also cause abnormal vibration and noise, shortening the service life of the product.

[0005] The fixing process is inconvenient. Whenever machining outer star wheels of different specifications, workers need to manually replace and adjust the fixture, which is cumbersome and time-consuming. Frequent replacement of the fixture not only reduces production efficiency but also increases the probability of errors due to multiple manual operation steps. The additional debugging time further lengthens the product delivery cycle.

[0006] The processing cost is high. Existing processing devices are divided into two major camps: numerical control and manual, but each has its drawbacks. Although numerical control processing devices can precisely control the rotation angle of the outer star wheel through pre-programmed programs, with high processing accuracy and strong stability, their purchase cost is extremely high. Manual processing devices, although having low equipment purchase costs and small initial investments, are greatly restricted by subjective factors such as the skill level, physical strength, and energy of workers when manually operating to control the rotation of the outer star wheel. Workers are prone to fatigue during long-term operations, and the slight tremors of the hands are amplified at the microscopic level of processing, resulting in a significant increase in the machining error of the spline, poor product consistency, and a high rejection rate, which is also not conducive to the efficient and stable production of enterprises. Summary of the Invention

[0007] (I) Technical problems to be solved Aiming at the deficiencies of the prior art, the present invention provides a spline processing device for the outer star wheel of an automotive drive shaft, which has the advantages of precise and convenient fixing of the outer star wheel and low processing cost, and solves the problems of difficult fixing of the outer star wheel, inconvenient fixing process, and high processing cost.

[0008] (II) Technical solutions To achieve the above object, the present invention provides the following technical solutions: A spline processing device for the outer star wheel of an automotive drive shaft, comprising a base, on which a fixing device and a cutting device are provided. On the left and right sides of the fixing device, a sliding ejector rod and a fixed ejector rod are respectively provided. The fixed ejector rod is rotatably connected to a support seat without relative displacement, and the sliding ejector rod is rotationally connected to another support seat through a thread. A rotating chuck is provided at one end of the sliding ejector rod close to the fixed ejector rod. The rotating chuck includes a movable rod and a clamping main body. One end of the movable rod is rotatably connected to the end of the sliding ejector rod, and the other end is slidably connected to the middle axis of the clamping main body. An inner clamping wheel is provided at one end of the clamping main body away from the movable rod. A plurality of ball channels are provided on the inner circumference of the inner clamping wheel. Both ends of each ball channel are respectively connected to the outside of the clamping main body and the middle axis of the clamping main body. A ball is provided in the ball channel. A chute is also provided at a position of the ball channel close to the middle axis of the clamping main body. A plurality of convex platforms corresponding to the chutes one by one are provided on the outside of the movable rod. An inclined front slope is provided on one side of each convex platform away from the sliding ejector rod. The front slope is used to push the ball outwards, so that the ball is pushed against the raceway to complete the fixing of the concentric shell.

[0009] Preferably, a scale wheel detachably connected and fixed is further provided on the clamping main body. A plurality of circumferentially evenly distributed teeth are provided on the outside of the scale wheel. The number of teeth is the same as the number of splines to be cut on the outer star wheel. When the inner clamping wheel is inserted into the concentric shell, the scale wheel is located outside the concentric shell; A positioning device is also slidably connected to the base. The sliding direction of the positioning device is parallel to the axis of rotation of the sliding ejector rod and the fixed ejector rod. A sleeve is fixedly connected to the positioning device. A ejector tongue is slidably connected inside the sleeve. The sliding direction of the ejector tongue is perpendicular to the axis of rotation of the sliding ejector rod and the fixed ejector rod. One end of the ejector tongue close to the fixing device is used to be stuck between two adjacent teeth on the outside of the graduated wheel. The cooperation between the ejector tongue and the graduated wheel can improve the accuracy of manually cutting the spline and can also prevent the rotating chuck from rotating when cutting the spline.

[0010] Preferably, a spring is further arranged in the middle part of the ejector tongue located inside the sleeve. One end of the spring close to the fixing device is in contact connection with the ejector tongue. One end of the spring far from the outer planet gear is in contact connection with the fixing block. The fixing block is sleeved on the outside of the ejector tongue and fits against the inner wall of the sleeve. Corresponding jacks are arranged at the same positions of the fixing block and the sleeve. The fixing block is fixed at a fixed position inside the sleeve through a locking pin. A pressure sensor is arranged on one side of the fixing block in contact with the spring and on one side of the ejector tongue in contact with the spring. During cutting, if the cutting point of the milling wheel is not directly above the axis of the outer planet gear, a clockwise or counterclockwise torque will be generated on the outer planet gear. Since the rotating chuck and the outer planet gear are fixed through balls and raceways, the torque of the outer planet gear will be transmitted to the rotating chuck, thereby causing a torque on the graduated wheel. By detecting the pressure received by the ejector tongue through the pressure sensor, the magnitude of the torque received by the graduated wheel can be analyzed. When the pressure value exceeds the preset value, the pressure sensor sends an alarm through the connected alarm to remind the worker that the cutting position has shifted.

[0011] Preferably, an arc-shaped shallow groove is arranged at the lowest point of the front inclined surface. The arc-shaped shallow groove is an arc-shaped groove with high sides and a low middle. When the clamping body is installed on the movable rod, the inner side of the ball falls into the arc-shaped shallow groove to prevent the clamping body from falling off the movable rod before starting to clamp the outer planet gear.

[0012] Preferably, a rear inclined surface is arranged on the side of the convex platform away from the front inclined surface. The function of the rear inclined surface is to enable the clamping body to be installed from both ends of the movable rod. When installing from the side of the rear inclined surface, the clamping body needs to be installed first and then the movable rod is installed on the sliding ejector rod; when installing from the side of the front inclined surface, the clamping body can be installed first or the movable rod can be installed first.

[0013] Preferably, chamfers are arranged at the contact parts between the teeth of the graduated wheel and the ejector tongue, so that a thrust along the sliding direction can be generated on the ejector tongue when the graduated wheel generates a torque.

[0014] Preferably, rotating handles are respectively provided at the ends of the sliding ejector rod and the fixed ejector rod that are away from each other. The rotating handle on the fixed ejector rod is used to rotate the fixed ejector rod in place, thereby driving the outer planet gear to rotate; the rotating handle on the sliding ejector rod is used to rotate the sliding ejector rod, so that the sliding ejector rod displaces on the basis of being threadedly connected to the support base, so that the rotating chuck at the end of the sliding ejector rod holds the outer planet gear in the concentric shell, suitable for outer planet gears of different lengths and sizes.

[0015] Preferably, a sleeve is provided at the end of the sliding ejector rod. One end of the movable rod is inserted into the sleeve and provided with a clamping groove. The sleeve is provided with a threaded hole at the position corresponding to the clamping groove. By inserting a bolt into the threaded hole, the end of the bolt is pushed into the clamping groove, so that the movable rod can rotate in the sleeve at the end of the sliding ejector rod without sliding, and only the bolt needs to be taken out during installation and disassembly.

[0016] Preferably, the cutting device includes a milling wheel for cutting splines on the outer planet gear. The milling wheel is fixed on a rotating shaft, the end of the rotating shaft is connected to the output shaft of a milling motor, the milling motor is arranged in a lifting box, the lifting box is slidably connected up and down to a sliding box, a hydraulic cylinder is arranged in the sliding box, the top of the ejector rod arranged in the hydraulic cylinder is fixedly connected to the bottom of the lifting box, the sliding box is slidably connected above a base, a fixed box is also fixedly connected to the base, a lead screw motor is arranged in the fixed box, the output shaft of the lead screw motor is connected to a lead screw, the lead screw passes through the sliding box, an external thread is arranged on the lead screw, an internal thread that meshes with each other is arranged at the connection between the sliding box and the lead screw, and the end of the lead screw away from the fixed box is rotatably connected to a support plate, and the support plate is fixed on the base.

[0017] Preferably, a support rod is also arranged on the lifting box. The support rod is fixed on the lifting box and sleeved outside the rotating shaft.

[0018] (III) Beneficial effects Compared with the prior art, the present invention provides a device for processing the splines of the outer planet gear of an automotive drive shaft, having the following beneficial effects: 1. For the processing device of the external spline of the automotive drive shaft outer star wheel, a rotating chuck is provided at the end of the sliding ejector rod. One end of the movable rod is detachably connected to the end of the sliding ejector rod, and the other end is slidably connected to the clamping body. When the movable rod pushes the clamping body into the concentric shell of the outer star wheel, the convex platform on the movable rod pushes the balls in the inner clamping wheel outwards and catches them in the raceway in the concentric shell, so that the central axis of the outer star wheel coincides with the central axis of the rotating chuck. This fixing method uses the inner clamping wheel to simulate the inner star wheel to clamp the concentric shell, which simplifies the clamping steps and improves the clamping accuracy. At the same time, the connection method between the clamping body and the movable rod can facilitate the replacement of different clamping bodies to be installed on the same movable rod, so as to adapt to outer star wheels of different sizes, and the clamping body can be directly sleeved on the movable rod to complete the installation. In summary, the rotating chuck improves the clamping accuracy and efficiency of the outer star wheel, and the installation of the rotating chuck is also simple and fast.

[0019] 2. For the processing device of the external spline of the automotive drive shaft outer star wheel, a scale wheel is provided at the end of the clamping body far from the inner clamping wheel, and a plurality of teeth evenly distributed in a circle are arranged on the outside of the scale wheel. The number of teeth is the same as the number of splines to be cut on the outer star wheel. A positioning device is also provided on the base, and the ejector tongue slidably connected in the positioning device is used to insert between two adjacent teeth on the scale wheel. By setting the scale wheel and the ejector tongue to cooperate, it is convenient for workers to position the position of each spline. At the same time, the ejector tongue inserted on the scale wheel can play a role in fixing the rotating chuck to prevent deflection during cutting.

[0020] 3. For the processing device of the external spline of the automotive drive shaft outer star wheel, a fixing block is provided in the ejector tongue, and the pressure generated by the ejector tongue in the sliding direction is detected through a spring and the fixing block. When the ejector tongue abuts against the scale wheel, if the cutting point of the milling wheel is not directly above the central axis of the outer star wheel, a clockwise or counterclockwise torque will be generated on the outer star wheel. Since the rotating chuck and the outer star wheel are fixed through balls and raceways, the torque of the outer star wheel will be transmitted to the rotating chuck, thereby causing the scale wheel to generate torque. By detecting the pressure received by the ejector tongue through a pressure sensor, the magnitude of the torque received by the scale wheel can be analyzed. When the pressure value exceeds the preset value, the pressure sensor sends an alarm through the connected alarm to remind the worker that the cutting position has shifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the structure of the fixing device of the present invention.

[0023] Figure 3 It is an exploded view of the rotating chuck of the present invention.

[0024] Figure 4 It is an exploded view of the clamping body of the present invention.

[0025] Figure 5 This is a schematic diagram of the clamping main body structure of the present invention.

[0026] Figure 6 This is a schematic diagram of the movable rod structure of the present invention.

[0027] Figure 7 This is a schematic diagram of the positioning device structure of the present invention.

[0028] Figure 8 This is an exploded view of the positioning device of the present invention.

[0029] Figure 9 This is a schematic diagram of the cutting device structure of the present invention.

[0030] Figure 10 This is an exploded view of the cutting device of the present invention.

[0031] Figure 11 This is a sectional view of the fixing device of the present invention.

[0032] Figure 12 For the present invention Figure 11 Partial enlarged view of the transfer chuck.

[0033] In the figure: 1, base; 2, outer star wheel; 3, fixing device; 4, positioning device; 5, cutting device; 6, transfer chuck; 21, concentric shell; 22, raceway; 31, sliding ejector rod; 32, fixed ejector rod; 301, support seat; 302, turning handle; 41, sleeve; 42, ejecting tongue; 43, spring; 44, fixed block; 45, rotating rod; 46, jack; 51, milling wheel; 52, rotating shaft; 53, lifting box; 54, sliding box; 55, lead screw; 56, fixed box; 57, support rod; 561, lead screw motor; 541, hydraulic cylinder; 531, milling motor; 61, movable rod; 62, clamping main body; 611, convex platform; 6111, front inclined surface; 6112, rear inclined surface; 6113, arc-shaped shallow groove; 612, clamping groove; 621, inner clamping wheel; 622, graduated wheel; 6211, ball channel; 6212, ball; 6213, sliding groove. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0036] In addition, a fixed connection means a connection in which parts or components are fixed without any relative movement; a transmission connection means a connection method in which mechanical motion or torque is transmitted to other working components through transmission parts; a sliding connection means a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotational connection means a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0037] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0038] Embodiment 1: This embodiment provides a processing device for the external spline of an automotive drive shaft, having the following technical features.

[0039] Please refer to Figure 1-12, An outer spline machining device for an automotive drive shaft outer wheel, comprising a base 1, on which a fixing device 3 and a cutting device 5 are arranged. On the left and right sides of the fixing device 3, a sliding ejector rod 31 and a fixed ejector rod 32 are respectively arranged. The fixed ejector rod 32 is rotatably connected to a support base 301 without relative displacement, and the sliding ejector rod 31 is rotatably connected to another support base 301 through a thread. One end of the sliding ejector rod 31 close to the fixed ejector rod 32 is provided with a rotary chuck 6. The rotary chuck 6 includes a movable rod 61 and a clamping main body 62. One end of the movable rod 61 is rotatably connected to the end of the sliding ejector rod 31, and the other end is slidably connected to the axis of the clamping main body 62. One end of the clamping main body 62 away from the movable rod 61 is provided with an inner clamping wheel 621. A plurality of ball channels 6211 are arranged on the inner circumference of the inner clamping wheel 621. Both ends of each ball channel 6211 are respectively connected to the outside of the clamping main body 62 and the axis of the clamping main body 62. A ball 6212 is arranged in the ball channel 6211. A chute 6213 is also arranged at a position of the ball channel 6211 close to the axis of the clamping main body 62. A plurality of bosses 611 corresponding to the chutes 6213 one by one are arranged on the outside of the movable rod 61. An inclined front slope 6111 is arranged on one side of each boss 611 away from the sliding ejector rod 31. The front slope 6111 is used to push the ball 6212 outwards, so that the ball 6212 is pushed against the raceway 22 to complete the fixation of the concentric shell 21.

[0040] In an optional embodiment, a scale wheel 622 detachably connected and fixed is further arranged on the clamping main body 62. A plurality of teeth evenly distributed in a circumferential direction are arranged on the outside of the scale wheel 622. The number of teeth is the same as the number of splines to be cut on the outer wheel 2. When the inner clamping wheel 621 is inserted into the concentric shell 21, the scale wheel 622 is located outside the concentric shell 21; A positioning device 4 is also slidably connected to the base 1. The sliding direction of the positioning device 4 is parallel to the axis of rotation of the sliding ejector rod 31 and the fixed ejector rod 32. A sleeve 41 is fixedly connected to the positioning device 4. A top tongue 42 is slidably connected in the sleeve 41. The sliding direction of the top tongue 42 is perpendicular to the axis of rotation of the sliding ejector rod 31 and the fixed ejector rod 32. One end of the top tongue 42 close to the fixing device 3 is used to be stuck between two adjacent teeth on the outside of the scale wheel 622. The cooperation between the top tongue 42 and the scale wheel 622 can improve the accuracy of manual spline cutting and can also prevent the rotary chuck 6 from rotating when cutting the splines.

[0041] In an alternative embodiment, a spring 43 is further provided in the middle part of the top tongue 42 located inside the sleeve 41. One end of the spring 43 close to the fixing device 3 is in contact connection with the top tongue 42, and one end of the spring 43 far from the outer planet gear 2 is in contact connection with the fixing block 44. The inner side of the fixing block 44 is sleeved on the top tongue 42, and the outer side is attached to the inner wall of the sleeve 41. Corresponding jacks 46 are provided at the same position on the fixing block 44 and the sleeve 41, and the fixing block 44 is fixed at a fixed position inside the sleeve 41 through a locking pin. A pressure sensor is provided on one side of the fixing block 44 in contact with the spring 43 or on one side of the top tongue 42 in contact with the spring 43. During cutting, if the cutting point of the milling wheel 51 is not directly above the central axis of the outer planet gear 2, a clockwise or counterclockwise torque will be generated on the outer planet gear 2. Since the rotating chuck 6 and the outer planet gear 2 are fixed through the balls 6212 and the raceway 22, the torque of the outer planet gear 2 will be transmitted to the rotating chuck 6, thereby causing a torque on the graduated wheel 622. By detecting the pressure received by the top tongue 42 through the pressure sensor, the magnitude of the torque received by the graduated wheel 622 can be analyzed. When the pressure value exceeds the preset value, the pressure sensor emits an alarm through the connected alarm to remind the worker that the cutting position has shifted.

[0042] In an alternative embodiment, an arc-shaped shallow groove 6113 is provided at the lowest part of the front inclined surface 6111. The arc-shaped shallow groove 6113 is an arc-shaped groove with high sides and a low middle. When the clamping body 62 is installed on the movable rod 61, the inner sides of the balls 6212 fall into the arc-shaped shallow groove 6113 to prevent the clamping body 62 from falling off the movable rod 61 before starting to clamp the outer planet gear 2.

[0043] In an alternative embodiment, a rear inclined surface 6112 is provided on the side of the convex platform 611 away from the front inclined surface 6111. The function of the rear inclined surface 6112 is to enable the clamping body 62 to be installed from both ends of the movable rod 61. When installing from the side of the rear inclined surface 6112, the clamping body 62 needs to be installed first and then the movable rod 61 is installed on the sliding ejector rod 31; when installing from the side of the front inclined surface 6111, the clamping body 62 can be installed first or the movable rod 61 can be installed first.

[0044] In an alternative embodiment, chamfers are provided on the contact parts of the teeth of the graduated wheel 622 and the top tongue 42, so that when the graduated wheel 622 generates a torque, a thrust along the sliding direction can be generated on the top tongue 42.

[0045] In an alternative embodiment, rotatable handles 302 are respectively provided at the ends of the sliding ejector rod 31 and the fixed ejector rod 32 that are away from each other. The rotatable handle 302 on the fixed ejector rod 32 is used to rotate the fixed ejector rod 32 in place, thereby driving the outer planet gear 2 to rotate; the rotatable handle 302 on the sliding ejector rod 31 is used to rotate the sliding ejector rod 31, so that the sliding ejector rod 31 is displaced on the basis of being threadedly connected to the support base 301, so that the rotating chuck 6 at the end of the sliding ejector rod 31 abuts against the concentric shell 21 of the outer planet gear 2, suitable for outer planet gears 2 of different lengths and sizes.

[0046] In an alternative embodiment, a sleeve is provided at the end of the sliding ejector rod 31. One end of the movable rod 61 is inserted into the sleeve and provided with a card slot 612. The sleeve is provided with a threaded hole at a position corresponding to the card slot 612. By inserting a bolt into the threaded hole, the end of the bolt is pushed into the card slot 612, so that the movable rod 61 can rotate in the sleeve at the end of the sliding ejector rod 31 without sliding, and only the bolt needs to be taken out during installation and disassembly.

[0047] In an alternative embodiment, the cutting device 5 includes a milling wheel 51 for cutting splines on the outer planet gear 2. The milling wheel 51 is fixed on the rotating shaft 52. The end of the rotating shaft 52 is connected to the output shaft of the milling motor 531. The milling motor 531 is arranged in the lifting box 53. The lifting box 53 is slidably connected to the sliding box 54 up and down. A hydraulic cylinder 541 is arranged in the sliding box 54. The top of the ejector rod arranged in the hydraulic cylinder 541 is fixedly connected to the bottom of the lifting box 53. The sliding box 54 is slidably connected above the base 1. A fixed box 56 is also fixedly connected to the base 1. A lead screw motor 561 is arranged in the fixed box 56. The output shaft of the lead screw motor 561 is connected to the lead screw 55. The lead screw 55 passes through the sliding box 54. The lead screw 55 is provided with an external thread. The sliding box 54 and the lead screw 55 are provided with mutually meshing internal threads at the connection. The end of the lead screw 55 away from the fixed box 56 is rotatably connected to the support plate, and the support plate is fixed on the base 1.

[0048] In an alternative embodiment, a support rod 57 is further arranged on the lifting box 53. The support rod 57 is fixed on the lifting box 53. The support rod 57 is sleeved outside the rotating shaft 52.

[0049] In an alternative embodiment, a constriction is provided at the edge of the outer outlet of the ball channel 6211. The constriction means that the channel becomes narrower to prevent the balls 6212 from falling out of the ball channel 6211.

[0050] In an alternative embodiment, the extension line of the central axis of the ball channel 6211 passes through the center point of the clamping main body 62.

[0051] In an alternative embodiment, the ball channels 6211 are located in the same plane, and this plane is perpendicular to the central axis of the clamping main body 62.

[0052] In an alternative embodiment, each ball 6212 rolls inwards or outwards in the corresponding ball channel 6211, and the outer wall of the ball 6212 fits against the inner wall of the ball channel 6211.

[0053] In an alternative embodiment, one end of the outer planet gear 2 is a rotating shaft and the other end is a concentric shell 21. A plurality of raceways 22 are provided inside the concentric shell 21. The rotating chuck 6 on the sliding ejector rod 31 is used to fix the concentric shell 21 from the inside, and the fixed ejector rod 32 is used to fix the end of the rotating shaft of the outer planet gear 2. The ball channels 6211 correspond to the raceways 22 one by one.

[0054] In an alternative embodiment, the part of the fixed ejector rod 32 that abuts against the edge of the end of the rotating shaft of the outer planet gear 2 is provided with a plurality of protrusions distributed circumferentially, which are used to press against the end of the rotating shaft to increase the friction force.

[0055] In an alternative embodiment, the graduated wheel 622 is fixed to one end of the clamping body 62 by bolts.

[0056] In an alternative embodiment, the connections between the spring 43 and the ejector tongue 42 and the fixed block 44 are all contact connections.

[0057] In an alternative embodiment, the rotating shaft 52 and the milling motor 531 can be connected by fixing with a pin or by meshing transmission through gears.

[0058] In an alternative embodiment, concave slide rails or convex tracks are provided at the sliding connections between the base 1, the sliding box 54 and the positioning device 4.

[0059] In an alternative embodiment, both the fixed box 56 and the support plate are detachably fixed to the base 1 by bolts.

[0060] In an alternative embodiment, the inner clamping wheel 621 is fixed to the clamping body 62 by welding, or the inner clamping wheel 621 and the clamping body 62 are of an integral structure.

[0061] In an alternative embodiment, a rotating rod 45 is detachably connected to the end of the ejector tongue 42 away from the fixing device 3.

[0062] Working principle: Before starting cutting, first rotatably connect the rotating chuck 6 to the end of the sliding ejector rod 31, then select the clamping body 62 of the corresponding size, install the ball 6212 into the ball channel 6211 from the inner axis of the clamping body 62, and then put the clamping body 62 on the movable rod 61. At this time, the inner side of the ball 6212 abuts against the lower part of the front inclined surface 6111, that is, the outer side of the ball 6212 is hidden in the front inclined surface 6111 without protruding outward. Then, press the shaft end of the outer star wheel 2 against the fixed ejector rod 32, rotate the sliding ejector rod 31 to drive the rotating chuck 6 to move towards the inside of the concentric shell 21. The inner clamping wheel 621 is inserted into the concentric shell 21. When the end of the inner clamping wheel 621 abuts against the inner side of the concentric shell 21, the movable rod 61 continues to move inward, so that a relative displacement occurs between the movable rod 61 and the clamping body 62. At this time, the front inclined surface 6111 pushes the ball 6212 outward, causing the outer side of the ball 6212 to protrude from the ball channel 6211 and be stuck in the raceway 22. By fixing the concentric shell 21 with the rotating chuck 6, the central axis of the movable rod 61 can be accurately aligned with the central axis of the outer star wheel 2. Moreover, the installation of the rotating chuck 6 is simple and fast. Pressing the rotating chuck 6 into the concentric shell 21 does not require additional operations, and only by controlling the sliding ejector rod 31 to drive the movable rod 61 to be withdrawn from the concentric shell 21 can the separation be completed, greatly simplifying the operation steps.

[0063] To sum up, for the processing device of the outer star wheel spline of the automobile drive shaft, a rotating chuck 6 is arranged at the end of the sliding ejector rod 31. One end of the movable rod 61 is detachably connected to the end of the sliding ejector rod 31, and the other end is slidably connected to the clamping body 62. When the movable rod 61 pushes the clamping body 62 into the concentric shell 21 of the outer star wheel 2, the boss 611 on the movable rod 61 pushes the ball 6212 in the inner clamping wheel 621 outward and is stuck in the raceway 22 in the concentric shell 21, so that the central axis of the outer star wheel 2 coincides with the central axis of the rotating chuck 6. This fixing method uses the inner clamping wheel 621 to simulate the inner star wheel to clamp the concentric shell 21, which simplifies the clamping steps and improves the clamping accuracy at the same time. At the same time, the connection method between the clamping body 62 and the movable rod 61 can facilitate the replacement of different clamping bodies 62 to be installed on the same movable rod 61, so as to adapt to outer star wheels 2 of different sizes. And the clamping body 62 can be directly sleeved on the movable rod 61 to complete the installation. To sum up, the rotating chuck 6 improves the clamping accuracy and clamping efficiency of the outer star wheel 2, and the installation of the rotating chuck 6 is also simple and fast.

[0064] For the machining device of the external spline of the outer star wheel of the vehicle drive shaft, a graduator wheel 622 is detachably and fixedly connected to one end of the clamping main body 62 away from the inner clamping wheel 621. A plurality of teeth are evenly distributed on the outer side of the graduator wheel 622, and the number of teeth is the same as the number of splines to be cut on the outer star wheel 2. A positioning device 4 is also arranged on the base 1. The ejector tongue 42 slidably connected in the positioning device 4 is used to insert between two adjacent teeth on the graduator wheel 622. By setting the cooperation between the graduator wheel 622 and the ejector tongue 42, it is convenient for workers to position the position of each spline. At the same time, when the ejector tongue 42 is inserted on the graduator wheel 622, it can fix the rotating chuck 6 to prevent deflection during cutting.

[0065] For the machining device of the external spline of the outer star wheel of the vehicle drive shaft, a fixing block 44 is arranged in the ejector tongue 42. The pressure generated by the ejector tongue 42 in the sliding direction is detected through the spring 43 and the fixing block 44. When the ejector tongue 42 abuts against the graduator wheel 622, if the cutting point of the milling wheel 51 is not directly above the central axis of the outer star wheel 2, a clockwise or counterclockwise torque will be generated on the outer star wheel 2. Since the rotating chuck 6 and the outer star wheel 2 are fixed through the balls 6212 and the raceways 22, the torque of the outer star wheel 2 will be transmitted to the rotating chuck 6, thereby generating a torque on the graduator wheel 622. By detecting the pressure received by the ejector tongue 42 through the pressure sensor, the magnitude of the torque received by the graduator wheel 622 can be analyzed. When the pressure value exceeds the preset value, the pressure sensor sends an alarm through the connected alarm to remind the worker that the cutting position has shifted.

[0066] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including an..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0067] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for processing a spline of an outer star wheel of an automobile drive shaft, comprising a base (1), a fixing device (3) and a cutting device (5) being arranged on the base (1), a sliding push rod (31) and a fixed push rod (32) being arranged on the left and right sides of the fixing device (3), respectively, the fixed push rod (32) being rotatably connected to a support seat (301) without relative displacement, and the sliding push rod (31) being rotatably connected to another support seat (301) via a thread, characterized in that: A rotating chuck (6) is provided at one end of the sliding push rod (31) close to the fixed push rod (32), and the rotating chuck (6) comprises a movable rod (61) and a clamping body (62), one end of the movable rod (61) is rotatably connected to the end of the sliding push rod (31), and the other end is slidably connected to the center axis of the clamping body (62), an inner clamping wheel (621) is provided at one end of the clamping body (62) away from the movable rod (61), and a plurality of ball channels (6211) are provided on the inner circumference of the inner clamping wheel (621), and two ends of each ball channel (6211) are respectively connected to the outer side of the clamping body (62) and the center axis of the clamping body (62), and a ball (6212) is provided in the ball channel (6211); A slide groove (6213) is also provided at a position of the ball channel (6211) close to the central axis of the clamping body (62); a plurality of bosses (611) corresponding to the slide grooves (6213) are provided on the outer side of the movable rod (61); each boss (611) is provided with an inclined front bevel (6111) on a side away from the sliding push rod (31); the front bevel (6111) is used to push the ball (6212) outward, so that the ball (6212) is pushed into the raceway (22) to complete the fixation of the concentric shell (21).

2. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: The clamping body (62) is also provided with a detachably connected and fixed scale wheel (622), the outer side of the scale wheel (622) is provided with a plurality of gear teeth evenly distributed around the circumference, the number of the gear teeth being the same as the number of splines to be cut on the outer star wheel (2), and when the inner clamping wheel (621) is inserted into the concentric shell (21), the scale wheel (622) is located outside the concentric shell (21); The base (1) is also slidably connected to a positioning device (4), the direction of the sliding connection of the positioning device (4) being parallel to the rotation axis of the sliding push rod (31) and the fixed push rod (32), the positioning device (4) being fixedly connected to a sleeve (41), the sleeve (41) being slidably connected to a top tongue (42), the direction of the sliding connection of the top tongue (42) being perpendicular to the rotation axis of the sliding push rod (31) and the fixed push rod (32), and the end of the top tongue (42) close to the fixing device (3) is used to be clamped in a position between two adjacent gear teeth on the outside of the scale wheel (622).

3. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 2, characterized in that: A spring (43) is also provided at the middle section of the top tongue (42) located in the sleeve (41); one end of the spring (43) close to the fixing device (3) is in contact with the top tongue (42); one end of the spring (43) away from the outer star wheel (2) is in contact with the fixing block (44); the inner side of the fixing block (44) is sleeved on the top tongue (42) and the outer side is attached to the inner wall of the sleeve (41); the fixing block (44) and the sleeve (41) are provided with corresponding insertion holes (46) at the same position; the fixing block (44) is fixed to a fixed position in the sleeve (41) by a locking pin; The fixed block (44) is provided with a pressure sensor on the side in contact with the spring (43). The pressure sensor detects the pressure applied to the top tongue (42) and analyzes the torque applied to the scale wheel (622). When the pressure value exceeds a preset value, the pressure sensor sends an alarm by connecting to an alarm.

4. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 2, characterized in that: An arc-shaped shallow groove (6113) is provided at the lowest point of the front inclined surface (6111). The arc-shaped shallow groove (6113) is an arc-shaped groove with high sides and low middle. When the clamping body (62) is mounted on the movable rod (61), the inner side of the ball (6212) falls into the arc-shaped shallow groove (6113), so as to prevent the clamping body (62) from falling off the movable rod (61) before the outer star wheel (2) is clamped.

5. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 2, characterized in that: A rear inclined surface (6112) is provided on a side of the boss (611) away from the front inclined surface (6111).

6. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 3, characterized in that: The contact portions of the gear teeth of the scale wheel (622) and the top tongue (42) are both provided with chamfers.

7. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: The sliding push rod (31) and the fixed push rod (32) are each provided with a rotating handle (302) at one end away from each other. The rotating handle (302) on the fixed push rod (32) is used to rotate the fixed push rod (32) in situ, thereby driving the outer star wheel (2) to rotate; the rotating handle (302) on the sliding push rod (31) is used to rotate the sliding push rod (31), so that the sliding push rod (31) is displaced on the basis of being threadedly connected to the support seat (301), so that the rotating chuck (6) at the end of the sliding push rod (31) is pressed against the concentric shell (21) of the outer star wheel (2), and is suitable for outer star wheels (2) of different lengths.

8. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: A sleeve is provided at the end of the sliding push rod (31), one end of the movable rod (61) is inserted into the sleeve and provided with a slot (612), a threaded hole is provided in the sleeve at a position corresponding to the slot (612), and a bolt is inserted into the threaded hole so that the end of the bolt is pushed into the slot (612).

9. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: The cutting device (5) comprises a milling wheel (51) for cutting splines on the outer star wheel (2); the milling wheel (51) is fixed on a rotating shaft (52); the end of the rotating shaft (52) is connected to the output shaft of a milling motor (531); the milling motor (531) is arranged in a lifting box (53); the lifting box (53) is slidably connected to a sliding box (54) up and down; a hydraulic cylinder (541) is arranged in the sliding box (54); the top of a push rod arranged in the hydraulic cylinder (541) is fixedly connected to the bottom of the lifting box (53); and the sliding box (54) is slidably connected above the base (1); The base (1) is also fixedly connected to a fixed box (56), a screw motor (561) is arranged in the fixed box (56), the output shaft of the screw motor (561) is connected to a screw rod (55), the screw rod (55) passes through the sliding box (54), an external thread is arranged on the screw rod (55), and a mutually meshing internal thread is arranged at the connection between the sliding box (54) and the screw rod (55), and one end of the screw rod (55) away from the fixed box (56) is rotatably connected to a support plate, and the support plate is fixed to the base (1).

10. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 9, characterized in that: The lifting box (53) is also provided with a support rod (57), the support rod (57) is fixed on the lifting box (53), and the support rod (57) is sleeved on the outside of the rotating shaft (52).

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