A spline processing device for outer planetary wheel of automobile drive shaft

Abstract

The present invention relates to the technical field of processing outer planetary gear splines, and discloses a device for processing outer planetary gear splines of an automobile drive shaft, comprising a base, a fixing device and a cutting device are arranged on the base, a sliding push rod and a fixed push rod are arranged on the left and right sides of the fixing device respectively, a chuck is arranged at one end of the sliding push rod close to the fixed push rod, the chuck comprises a movable rod and a clamping body, one end of the movable rod is rotatably connected to the end of the sliding push rod, and the other end is slidably connected to the central axis of the clamping body, an inner clamping wheel is arranged at the end of the clamping body away from the movable rod, a plurality of ball channels are arranged in the inner clamping wheel, balls are arranged in the ball channels, and a slide groove is further arranged at the position of the ball channel close to the central axis of the clamping body, a boss is arranged on the outer side of the movable rod, and a front bevel is arranged on the front side of each boss, the front bevel is used to push the ball outward, so that the ball is pressed into the raceway to complete the fixation of the concentric shell. It has the advantages of accurately and conveniently fixing the outer planetary gear and low processing cost.

Description

Technical Field

[0001] The invention relates to the technical field of outer planetary wheel spline processing, in particular to a device for processing outer planetary wheel splines of an automobile drive shaft. Background Art

[0002] In the automotive industry, the outer planetary gear of the drive shaft is a key component. The machining accuracy of its spline 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 between components. Therefore, the machining of outer planetary gear spline has always been a key and difficult point in the production process of automotive parts.

[0003] Traditional devices used for machining splines on the outer planetary gears of automotive drive shafts mostly operate on a principle that combines mechanical transmission with cutting. This is typically accomplished using a conventional machine tool with a rotating cutting tool, driven by a motor, which cuts the spline grooves into the outer planetary gear blank along a predetermined path. During machining, the workpiece is secured to the machine table with a fixture. The operator, relying on experience, adjusts the fixture's position and clamping force to ensure the outer planetary gear is properly positioned relative to the tool during machining. Simultaneously, the machine's feed system, based on a preset program or manual control, controls the tool's gradual penetration into the blank, carving out the spline shape bit by bit.

[0004] By analyzing an outer planet wheel keyway milling device with publication number CN118106772A and an outer planet wheel positioning tool with publication number CN202411075136.9, we found that the existing technology still has the following defects:

[0005] Securing the outer gear is difficult, and existing technologies for securing it lack accuracy. Conventional fixtures struggle to precisely fit the complex outer gear contours. The outer gear's surface is irregular, and there are significant subtle differences between batches. Conventional fixtures cannot provide a full, tight fit, causing the outer gear to shift slightly during machining. Once this shift occurs, the cut spline tooth profile and pitch will deviate from the design standards, seriously affecting the meshing of the spline with other transmission components, reducing the drive shaft's transmission efficiency, and potentially causing abnormal vibration and noise, shortening the product's lifespan.

[0006] The fixing process is inconvenient. Whenever processing alien wheels of different specifications, workers need to manually replace and adjust the fixtures. The operation is cumbersome and time-consuming. Frequent replacement of fixtures not only reduces production efficiency, but also increases the probability of errors due to the many manual operation links. The additional debugging time further prolongs the product delivery cycle.

[0007] Processing costs are high, and existing processing equipment is divided into two camps: CNC and manual, each with its own drawbacks. While CNC processing equipment can precisely control the rotation angle of the outer planetary wheel through pre-programmed programs, achieving high processing accuracy and stability, it comes at a high cost. Manual processing equipment, while low in equipment purchase costs and initial investment, is subject to significant constraints due to subjective factors such as worker skill level, physical strength, and energy. Workers fatigue easily after long hours, and even slight hand tremors are amplified at the microscopic level of processing, resulting in significantly increased spline processing errors, poor product consistency, and high scrap rates, all of which are detrimental to efficient and stable production. Summary of the Invention

[0008] (1) Technical problems solved

[0009] In response to the shortcomings of the existing technology, the present invention provides a spline processing device for the outer planet wheel of an automobile drive shaft, which has the advantages of accurate and convenient fixation of the outer planet wheel and low processing cost, and solves the problems of difficult fixation of the outer planet wheel, inconvenient fixation process and high processing cost.

[0010] (2) Technical solution

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A device for processing the spline of an outer planetary wheel of an automobile drive shaft comprises a base, a fixing device and a cutting device are provided on the base, a sliding push rod and a fixed push rod are respectively provided on the left and right sides of the fixing device, the fixed push rod is rotatably connected to a support seat without relative displacement, the sliding push rod is rotatably connected to the other support seat through a thread, a chuck is provided at one end of the sliding push rod close to the fixed push rod, the chuck comprises a movable rod and a clamping body, one end of the movable rod is rotatably connected to the end of the sliding push rod, and the other end is slidably connected to the clamping body At the central axis, an inner clamping wheel is provided at the end of the clamping body away from the movable rod, and a plurality of ball channels are provided on the inner circumference of the inner clamping wheel. The two ends of each ball channel are respectively connected to the outer side of the clamping body and the central axis of the clamping body. Balls are provided in the ball channel, and a slide groove is also provided in the ball channel near the central axis of the clamping body. A plurality of bosses corresponding to the slide grooves are provided on the outer side of the movable rod, and each boss is provided with an inclined front bevel on the side away from the sliding push rod, and the front bevel is used to push the ball outward, so that the ball is pushed into the raceway to complete the fixation of the concentric shell.

[0013] Preferably, the clamping body is further provided with a detachably connected and fixed scale wheel, the outer side of the scale wheel 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, and when the inner clamping wheel is inserted into the concentric shell, the scale wheel is located outside the concentric shell;

[0014] The base is also slidably connected to a positioning device, the direction of the sliding connection of the positioning device is parallel to the rotation axis of the sliding push rod and the fixed push rod, the positioning device is fixedly connected to a sleeve, and a top tongue is slidably connected in the sleeve, the direction of the sliding connection of the top tongue is perpendicular to the rotation axis of the sliding push rod and the fixed push rod, and the end of the top tongue close to the fixing device is used to be clamped in the position between two adjacent gear teeth on the outside of the scale wheel. The top tongue and the scale wheel cooperate with each other to improve the accuracy of manual cutting of splines, and can also prevent the chuck from rotating when cutting the splines.

[0015] Preferably, a spring is further provided on the middle section of the top tongue located in the sleeve, one end of the spring close to the fixing device is in contact with and connected to the top tongue, and one end of the spring away from the outer star wheel is in contact with and connected to the fixing block, the inner side of the fixing block is sleeved on the top tongue, and the outer side is fitted on the inner wall of the sleeve, the fixing block and the sleeve are provided with corresponding sockets at the same position, and the fixing block is fixed in a fixed position in the sleeve by a locking pin;

[0016] A pressure sensor is provided on one of the sides of the fixed block in contact with the spring and the side of the top tongue in contact with the spring. During cutting, if the cutting point of the milling wheel is not directly above the center axis of the outer planet wheel, a clockwise or counterclockwise torque will be generated on the outer planet wheel. Since the chuck and the outer planet wheel are fixed by balls and raceways, the torque of the outer planet wheel will be transmitted to the chuck, thereby causing the scale wheel to generate torque. The pressure on the top tongue is detected by the pressure sensor, and the magnitude of the torque on 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 is offset.

[0017] Preferably, an arc-shaped shallow groove is provided at the lowest point of the front inclined surface. The arc-shaped shallow groove is an arc-shaped groove with high sides and 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, which is used to prevent the clamping body from falling off from the movable rod before clamping the outer star wheel.

[0018] Preferably, a rear bevel is provided on the side of the boss away from the front bevel. The function of the rear bevel is to enable the clamping body to be installed from both ends of the movable rod. When installing from the side of the rear bevel, the clamping body needs to be installed first and then the movable rod is installed on the sliding top rod; when installing from the side of the front bevel, you can choose to install the clamping body first or the movable rod first.

[0019] Preferably, the contact portions of the teeth of the scale wheel and the top tongue are both provided with chamfers, so that when the scale wheel generates torque, a thrust force in the sliding direction can be generated toward the top tongue.

[0020] Preferably, the sliding push rod and the fixed push rod are respectively provided with a turning handle at one end away from each other, and the turning handle on the fixed push rod is used to rotate the fixed push rod in situ, thereby driving the outer planet wheel to rotate; the turning handle on the sliding push rod is used to rotate the sliding push rod, so that the sliding push rod is displaced on the basis of being threadedly connected to the support seat, so that the turning clamp head at the end of the sliding push rod is pressed into the concentric shell of the outer planet wheel, which is suitable for outer planet wheels of different lengths and sizes.

[0021] Preferably, a sleeve is provided at the end of the sliding push rod, one end of the movable rod is inserted into the sleeve and provided with a slot, and the sleeve is provided with a threaded hole at the position corresponding to the slot. By inserting a bolt into the threaded hole, the end of the bolt is pushed into the slot, so that the movable rod can rotate in the sleeve at the end of the sliding push rod without sliding, and only the bolt needs to be removed during installation and disassembly.

[0022] Preferably, the cutting device includes a milling wheel for cutting splines on the outer star wheel, the milling wheel is fixed on the rotating shaft, the end of the rotating shaft is connected to the output shaft of the milling motor, the milling motor is arranged in a lifting box, the lifting box is slidably connected to the sliding box up and down, a hydraulic cylinder is provided in the sliding box, the top of the push rod arranged in the hydraulic cylinder is fixedly connected to the bottom of the lifting box, the sliding box is slidably connected above the base, and the base is also fixedly connected to a fixed box, a screw motor is provided in the fixed box, the output shaft of the screw motor is connected to the screw rod, the screw rod passes through the sliding box, the screw rod is provided with an external thread, the sliding box and the screw rod are connected at the connection between the sliding box and the screw rod and an internal thread meshing with each other is provided, and one end of the screw rod away from the fixed box is rotatably connected to the support plate, and the support plate is fixed to the base.

[0023] Preferably, the lifting box is further provided with a support rod, the support rod is fixed on the lifting box, and the support rod is sleeved on the outside of the rotating shaft.

[0024] (3) Beneficial effects

[0025] Compared with the prior art, the present invention provides a device for machining the spline of an outer planetary wheel of an automobile drive shaft, which has the following beneficial effects:

[0026] The cam is connected to the end of the sliding push 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 planetary wheel, the boss on the movable rod pushes the ball in the inner clamping wheel outward and is stuck in the raceway in the concentric shell, so that the center axis of the outer planetary wheel coincides with the center axis of the chuck. This fixing method uses the inner clamping wheel to simulate the inner planetary wheel to clamp the concentric shell, simplifies the clamping steps and improves the clamping accuracy. At the same time, the connection method of the clamping body and the movable rod can facilitate the replacement of different clamping bodies and install them on the same movable rod, thereby adapting to outer planetary wheels of different sizes, and the clamping body can be directly sleeved on the movable rod to complete the installation. In summary, the chuck improves the clamping accuracy and clamping efficiency of the outer planetary wheel, and the installation of the chuck is also simple and fast.

[0027] 2. The spline processing device for the outer planetary wheel of the automobile drive shaft is provided with a detachable and fixed scale wheel at the end of the clamping body away from the inner clamping wheel. The outer side of the scale wheel is provided with a plurality of gear teeth evenly distributed on the circumference. The number of gear teeth is the same as the number of splines that need to be cut on the outer planetary wheel. A positioning device is also provided on the base. The top tongue slidably connected in the positioning device is used to be inserted between two adjacent gear teeth on the scale wheel. By arranging the scale wheel and the top tongue to cooperate with each other, it is convenient for workers to locate the position of each spline. At the same time, the top tongue inserted into the scale wheel can fix the chuck to prevent deflection during cutting.

[0028] 3. The automotive drive shaft outer planetary wheel spline processing device has a fixed block set inside the top tongue. The pressure generated by the top tongue in the sliding direction is detected by the spring and the fixed block. When the top tongue presses against the scale wheel, if the cutting point of the milling wheel is not directly above the center axis of the outer planetary wheel, a clockwise or counterclockwise torque will be generated on the outer planetary wheel. Since the chuck and the outer planetary wheel are fixed by balls and raceways, the torque of the outer planetary wheel will be transmitted to the chuck, thereby generating torque on the scale wheel. The pressure on the top tongue is detected by a pressure sensor, and the magnitude of the torque on the scale wheel can be analyzed. When the pressure value exceeds the preset value, the pressure sensor sounds an alarm through the connected alarm, reminding the worker that the cutting position has shifted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0030] Figure 2 It is a schematic structural diagram of the fixing device of the present invention.

[0031] Figure 3 It is an exploded view of the rotary chuck of the present invention.

[0032] Figure 4 It is an exploded view of the clamping body of the present invention.

[0033] Figure 5 It is a schematic diagram of the clamping main structure of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the movable rod of the present invention.

[0035] Figure 7 Schematic diagram of the structure of the positioning device of the present invention.

[0036] Figure 8 This is an exploded view of the positioning device of the present invention.

[0037] Figure 9 It is a schematic structural diagram of the cutting device of the present invention.

[0038] Figure 10 Exploded view of the cutting device of the present invention.

[0039] Figure 11 It is a cross-sectional view of the fixing device of the present invention.

[0040] Figure 12 For the present invention Figure 11 A partial enlarged view of the transfer chuck.

[0041] In the figure: 1, base; 2, outer star wheel; 3, fixing device; 4, positioning device; 5, cutting device; 6, chuck; 21, concentric shell; 22, raceway; 31, sliding push rod; 32, fixed push rod; 301, support seat; 302, handle; 41, sleeve; 42, tongue; 43, spring; 44, fixing block; 45, rod; 46, socket; 51, milling wheel; 52, shaft; 53, lifting box; 54, sliding Box; 55, screw; 56, fixed box; 57, support rod; 561, screw motor; 541, hydraulic cylinder; 531, milling motor; 61, movable rod; 62, clamping body; 611, boss; 6111, front bevel; 6112, rear bevel; 6113, arc-shaped shallow groove; 612, clamping slot; 621, inner clamping wheel; 622, scale wheel; 6211, ball channel; 6212, ball; 6213, slide. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0044] In addition, a fixed connection refers to a connection in which parts or components are fixed without any relative movement; a transmission connection refers to a connection method in which mechanical motion or torque is transmitted to other working parts through a transmission part; a sliding connection refers to a connection method in which two objects are in contact but not fixed and can slide relative to each other; a rotating connection refers to a connection method in which two objects are in contact but not fixed and can rotate relative to each other.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, features specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0046] Example 1:

[0047] This embodiment provides a device for processing the splines of the outer planetary wheel of an automobile drive shaft, which has the following technical features.

[0048] See also Figure 1-12A device for processing the spline of an outer planetary wheel of an automobile drive shaft includes a base 1, on which a fixing device 3 and a cutting device 5 are provided. A sliding push rod 31 and a fixed push rod 32 are respectively provided on the left and right sides of the fixing device 3. The fixed push rod 32 is rotatably connected to a support seat 301 without relative displacement. The sliding push rod 31 is rotatably connected to the other support seat 301 through a thread. A chuck 6 is provided at one end of the sliding push rod 31 close to the fixed push rod 32. The chuck 6 includes 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 central axis of the clamping body 62. The clamping body 62 is set at one end away from the movable rod 61. There is an inner clamping wheel 621, and a plurality of ball channels 6211 are arranged on the inner circumference of the inner clamping wheel 621. The two ends of each ball channel 6211 are respectively connected to the outer side of the clamping body 62 and the central axis of the clamping body 62. A ball 6212 is arranged in the ball channel 6211. A slide groove 6213 is also provided in the ball channel 6211 near the central axis of the clamping body 62. A plurality of bosses 611 corresponding to the slide groove 6213 are provided on the outer side of the movable rod 61. Each boss 611 is provided with an inclined front bevel 6111 on the 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 pressed against the raceway 22 to complete the fixation of the concentric shell 21.

[0049] In an optional embodiment, the clamping body 62 is further 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 gear teeth is the same as the number of splines that need to be cut on the outer star wheel 2. When the inner clamping wheel 621 is inserted into the concentric housing 21, the scale wheel 622 is located outside the concentric housing 21.

[0050] A positioning device 4 is also slidably connected to the base 1, and the direction of the sliding connection of the positioning device 4 is parallel to the rotation axis of the sliding push rod 31 and the fixed push rod 32. A sleeve 41 is fixedly connected to the positioning device 4, and a top tongue 42 is slidably connected in the sleeve 41. The direction of the sliding connection of the top tongue 42 is perpendicular to the rotation axis of the sliding push rod 31 and the fixed push rod 32. The top tongue 42 is close to one end of the fixing device 3 and is used to be stuck in the position between two adjacent gear 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 cutting of the spline, and can also prevent the chuck 6 from rotating when cutting the spline.

[0051] In an optional embodiment, a spring 43 is further provided on the middle section of the top tongue 42 located in the sleeve 41. The end of the spring 43 close to the fixing device 3 is in contact with the top tongue 42, and the end of the spring 43 away from the outer planet 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 sockets 46 at the same position, and the fixing block 44 is fixed in a fixed position in the sleeve 41 by a locking pin.

[0052] Pressure sensors are provided on one side of the fixing block 44 in contact with the spring 43 and 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 center axis of the outer wheel 2, a clockwise or counterclockwise torque will be generated on the outer wheel 2. Since the chuck 6 and the outer wheel 2 are fixed to the raceway 22 by the ball 6212, the torque of the outer wheel 2 will be transmitted to the chuck 6, thereby causing the scale wheel 622 to generate torque. The pressure on the top tongue 42 is detected by the pressure sensor, and the magnitude of the torque on the scale 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 is offset.

[0053] In an optional embodiment, 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 installed on the movable rod 61, the inner side of the ball 6212 falls into the arc-shaped shallow groove 6113, which is used to prevent the clamping body 62 from falling off from the movable rod 61 before clamping the outer star wheel 2.

[0054] In an optional embodiment, a rear bevel 6112 is provided on the side of the boss 611 away from the front bevel 6111. The function of the rear bevel 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 bevel 6112, it is necessary to install the clamping body 62 first and then install the movable rod 61 on the sliding top rod 31; when installing from the side of the front bevel 6111, you can choose to install the clamping body 62 first or you can choose to install the movable rod 61 first.

[0055] In an optional embodiment, the contact portions of the teeth of the scale wheel 622 and the top tongue 42 are both provided with chamfers, so that when the scale wheel 622 generates torque, a thrust force along the sliding direction can be generated toward the top tongue 42 .

[0056] In an optional embodiment, a turning handle 302 is respectively provided at one end of the sliding push rod 31 and the fixed push rod 32 away from each other. The turning handle 302 on the fixed push rod 32 is used to rotate the fixed push rod 32 in situ, thereby driving the outer planet 2 to rotate; the turning 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 chuck 6 at the end of the sliding push rod 31 is pressed against the concentric shell 21 of the outer planet 2, which is suitable for outer planets 2 of different lengths.

[0057] In an optional embodiment, 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 is provided with a slot 612, and the sleeve is provided with a threaded hole at a position corresponding to the slot 612. By inserting a bolt into the threaded hole, the end of the bolt is pushed into the slot 612, so that the movable rod 61 can rotate in the sleeve at the end of the sliding push rod 31 without sliding, and only the bolt needs to be removed during installation and disassembly.

[0058] In an optional embodiment, the cutting device 5 includes a milling wheel 51 for cutting splines on the outer star wheel 2, and 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 a lifting box 53, and the lifting box 53 is slidably connected to the sliding box 54 up and down. A hydraulic cylinder 541 is provided in the sliding box 54, and the top of the push rod provided 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. The base 1 is also fixedly connected to a fixed box 56, and a screw motor 561 is provided in the fixed box 56. The output shaft of the screw motor 561 is connected to a screw rod 55, which passes through the sliding box 54. An external thread is provided on the screw rod 55, and an internal thread that meshes with each other is provided at the connection between the sliding box 54 and the screw rod 55. The end of the screw rod 55 away from the fixed box 56 is rotatably connected to the support plate, and the support plate is fixed on the base 1.

[0059] In an optional embodiment, a support rod 57 is further provided on the lifting box 53 . The support rod 57 is fixed on the lifting box 53 and is sleeved on the outer side of the rotating shaft 52 .

[0060] In an optional embodiment, the edge of the outer outlet of the ball channel 6211 is provided with a closing edge, where the closing edge means that the channel becomes narrower to prevent the ball 6212 from falling out of the ball channel 6211.

[0061] In an optional embodiment, the extension line of the central axis of the ball channel 6211 passes through the center point of the clamping body 62.

[0062] In an optional embodiment, each ball channel 6211 is located in the same plane, and the plane is perpendicular to the central axis of the clamping body 62 .

[0063] In an optional embodiment, each ball 6212 rolls inward or outward in the corresponding ball channel 6211 , and the outer wall of the ball 6212 fits against the inner wall of the ball channel 6211 .

[0064] In an optional embodiment, one end of the outer planet wheel 2 is a rotating shaft and the other end is a concentric shell 21. Multiple raceways 22 are arranged in the concentric shell 21. The chuck 6 on the sliding push rod 31 is used to fix the concentric shell 21 from the inside. The fixed push rod 32 is used to fix the end of the rotating shaft of the outer planet wheel 2. The ball channel 6211 corresponds one-to-one to the raceway 22.

[0065] In an optional embodiment, the fixed push rod 32 is used to push against the outer planet wheel 2. The outer planet wheel 2 has a plurality of protrusions distributed around its edge for increasing friction on the end of the shaft.

[0066] In an optional embodiment, the scale wheel 622 is fixed to one end of the clamping body 62 by means of bolts.

[0067] In an optional embodiment, the connections between the spring 43 and the top tongue 42 and the fixing block 44 are all contact connections.

[0068] In an optional embodiment, the rotating shaft 52 and the milling motor 531 may be connected by a fixed connection through a latch or by a gear meshing transmission connection.

[0069] In an optional embodiment, the sliding connection between the base 1, the sliding box 54 and the positioning device 4 is provided with an inwardly concave sliding rail or an outwardly convex track.

[0070] In an optional embodiment, the fixing box 56 and the support plate are both detachably fixed to the base 1 by bolts.

[0071] In an optional 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 an integral structure.

[0072] In an optional embodiment, the end of the top tongue 42 away from the fixing device 3 is detachably connected to a rotating rod 45 .

[0073] Working principle: before starting cutting, first rotate the chuck 6 and connect it to the end of the sliding push rod 31, then select the clamping body 62 of the corresponding size, install the ball 6212 from the central axis of the clamping body 62 into the ball channel 6211, and then put the clamping body 62 on the movable rod 61. At this time, the inner side of the ball 6212 is pressed against the lower part of the front bevel 6111, that is, the outer side of the ball 6212 is hidden in the front bevel 6111 without protruding outward, then press the shaft end of the outer star wheel 2 against the fixed push rod 32, rotate the sliding push rod 31 to drive the chuck 6 to move toward the concentric shell 21, and the inner clamping wheel 621 is inserted into the concentric shell 21. When the end of the inner clamping wheel 621 When the part pushes to the inner side of the concentric shell 21, the movable rod 61 continues to move inward, thereby causing relative displacement between the movable rod 61 and the clamping body 62. At this time, the front bevel 6111 pushes the ball 6212 outward, so that the outer side of the ball 6212 protrudes from the ball channel 6211 and is stuck in the raceway 22. The concentric shell 21 is fixed by the chuck 6, so that the central axis of the movable rod 61 can be accurately aligned with the central axis of the outer star wheel 2, and the installation of the chuck 6 is simple and fast. There is no need for additional operation to press the chuck 6 into the concentric shell 21, and the disengagement can be completed by only controlling the sliding push rod 31 to drive the movable rod 61 to be pulled out of the concentric shell 21, which greatly simplifies the operation steps.

[0074] In summary, the automobile drive shaft outer planetary wheel spline processing device is provided with a chuck 6 at the end of the sliding push rod 31, one end of the movable rod 61 is detachably connected to the end of the sliding push 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 planetary wheel 2, the boss 611 on the movable rod 61 pushes the ball 6212 in the inner clamping wheel 621 outward and is clamped in the raceway 22 in the concentric shell 21, so that the central axis of the outer planetary wheel 2 coincides with the central axis of the chuck 6. This fixing method is generally By using the inner clamping wheel 621 to simulate the inner star wheel to clamp the concentric shell 21, the clamping steps are simplified and the clamping accuracy is improved. At the same time, the connection method between the clamping body 62 and the movable rod 61 can easily replace different clamping bodies 62 and install them 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. In summary, the chuck 6 improves the clamping accuracy and clamping efficiency of the outer star wheel 2, and the installation of the chuck 6 is also simple and fast.

[0075] The automobile drive shaft outer planetary wheel spline processing device is provided with a detachably fixed scale wheel 622 at one end of the clamping body 62 away from the inner clamping wheel 621. The outer side of the scale wheel 622 is provided with a plurality of gear teeth evenly distributed around the circumference. The number of gear teeth is the same as the number of splines that need to be cut on the outer planetary wheel 2. A positioning device 4 is also provided on the base 1. A top tongue 42 slidably connected in the positioning device 4 is used to be inserted between two adjacent gear teeth on the scale wheel 622. By arranging the scale wheel 622 to cooperate with the top tongue 42, it is convenient for workers to locate the position of each spline. At the same time, the top tongue 42 inserted into the scale wheel 622 can fix the rotary chuck 6 to prevent deflection during cutting.

[0076] The automotive drive shaft outer planetary wheel spline processing device is provided with a fixed block 44 within the top tongue 42. The pressure generated by the top tongue 42 in the sliding direction is detected by the spring 43 and the fixed block 44. When the top tongue 42 presses against the scale wheel 622, if the cutting point of the milling wheel 51 is not directly above the center axis of the outer planetary wheel 2, a clockwise or counterclockwise torque will be generated on the outer planetary wheel 2. Since the chuck 6 and the outer planetary wheel 2 are fixed to each other by the ball 6212 and the raceway 22, the torque of the outer planetary wheel 2 will be transmitted to the chuck 6, thereby causing the scale wheel 622 to generate torque. The pressure on the top tongue 42 is detected by a pressure sensor, and the magnitude of the torque on the scale 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 is offset.

[0077] It should be noted that, in this document, relational terms such as first and second, etc., are used only 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 "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0078] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A device for processing splines of an outer planetary wheel of an automobile drive shaft, comprising a base (1), a fixing device (3) and a cutting device (5) being provided on the base (1), a sliding push rod (31) and a fixed push rod (32) being provided 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 the other support seat (301) via a thread, characterized in that: The sliding push rod (31) is provided with a chuck (6) at one end close to the fixed push rod (32), and the 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), and the end of the clamping body (62) away from the movable rod (61) is provided with an inner clamping wheel (621), and the inner circumference of the inner clamping wheel (621) is provided with a plurality of ball channels (6211), and the 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 balls (6212) are provided in the ball channels (6211); A slide groove (6213) is further provided at a position of the ball channel (6211) near the central axis of the clamping body (62), and a plurality of bosses (611) corresponding to the slide grooves (6213) are provided on the outer side of the movable rod (61), and each boss (611) is provided with an inclined front bevel (6111) on a side away from the sliding push rod (31), and 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); The clamping body (62) is further provided with a detachably connected and fixed scale wheel (622), and a plurality of gear teeth evenly distributed around the circumference are provided on the outer side of the scale wheel (622), and the number of the gear teeth is the same as the number of splines to be cut on the outer star 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); The base (1) is also slidably connected to a positioning device (4), the direction of the sliding connection of the positioning device (4) is parallel to the rotation axis of the sliding push rod (31) and the fixed push rod (32), the positioning device (4) is fixedly connected to a sleeve (41), the sleeve (41) is slidably connected to a top tongue (42), the direction of the sliding connection of the top tongue (42) is 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 between two adjacent gear teeth on the outside of the scale wheel (622); The middle section of the top tongue (42) located in the sleeve (41) is further provided with a spring (43), one end of the spring (43) close to the fixing device (3) is in contact with the top tongue (42), and 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 fitted on the inner wall of the sleeve (41), the fixing block (44) and the sleeve (41) are provided with corresponding jacks (46) at the same position, and 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 magnitude of the torque applied to the scale wheel (622). When the pressure value exceeds a preset value, the pressure sensor issues an alarm via a connected alarm.

2. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, 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), which is used to prevent the clamping body (62) from falling off from the movable rod (61) before the outer star wheel (2) is clamped.

3. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: A rear bevel (6112) is provided on a side of the boss (611) away from the front bevel (6111).

4. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 1, characterized in that: The contact portions of the teeth of the scale wheel (622) and the top tongue (42) are both provided with chamfers.

5. 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 both 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 planet 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 into the concentric shell (21) of the outer planet wheel (2), and is suitable for outer planet wheels (2) of different lengths and sizes.

6. 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), and 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, and the end of the bolt is pushed into the slot (612).

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 cutting device (5) includes 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 connected to a sliding box (54) in an up-and-down sliding manner, a hydraulic cylinder (541) is arranged in the sliding box (54), the top of the 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 provided 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 provided on the screw rod (55), and a mutually meshing internal thread is provided at the connection between the sliding box (54) and the screw rod (55), and the end of the screw rod (55) away from the fixed box (56) is rotatably connected to the support plate, and the support plate is fixed to the base (1).

8. The device for processing the spline of the outer planetary wheel of the automobile drive shaft according to claim 7, characterized in that: The lifting box (53) is further 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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