Automobile transmission shaft CNC machining mechanism

Abstract

The present invention belongs to the technical field of numerical control machining, in particular to a numerical control machining mechanism for a speed change shaft of an automobile, and comprises: a machine tool; a pair of turning assemblies connected to the machine tool, a track groove slidably connected to the turning assemblies is provided on the machine tool, and a first driving mechanism for driving the turning assemblies to move is installed on the machine tool; a fixture assembly is fixedly installed on the machine tool; a pin assembly is used to press against one end of the speed change shaft; the fixture assembly comprises a fixed seat, a rotating seat is rotatably connected in the fixed seat, and a rotatable chuck seat is connected in the rotating seat; and a plurality of clamping assemblies are connected to both end surfaces of the chuck seat, for clamping and fixing the speed change shaft; after the turning assembly processes one end of the speed change shaft, the present invention can drive the speed change shaft to move without disassembling the speed change shaft by changing the direction of the pressure wheel on the fixture assembly, so that the turning assembly can process the other end of the speed change shaft, thereby improving the processing efficiency and precision of the speed change shaft.

Description

Technical Field

[0001] The invention relates to the technical field of numerical control machine tools, in particular to a numerical control machining mechanism for a speed change shaft of an automobile. Background Art

[0002] Lathe processing is a part of mechanical processing. Lathe processing mainly uses a turning tool to turn the rotating workpiece; on the lathe, drills, reamer, reamer, tap, die and knurling tools can also be used for corresponding processing. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces. They are the most widely used type of machine tool processing in machinery manufacturing and repair factories.

[0003] In the process of processing automobile transmission shaft parts, both ends of the shaft parts need to be processed first. The processing of a shaft part often requires multiple processes to complete. The existing production method of shaft parts is mostly to disassemble the parts and transfer them to another device for the next process after completing the processing process at one end. This results in the need for multiple devices to complete the complete processing of a shaft part. In addition, a core key point affecting the quality of shaft parts is the coaxiality of shaft parts. Each process means that the shaft parts need to be re-clamped. In this way, the coaxiality of shaft parts is difficult to maintain within the required range, and the quality of the processed products is uneven and the precision is poor. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a CNC machining mechanism for an automobile transmission shaft, which is capable of driving the shaft to move by providing a fixture assembly, thereby facilitating machining of the surfaces at both ends of the shaft, aiming to solve the problems in the background technology.

[0005] In order to achieve the above technical objectives, the specific technical scheme of the present invention is as follows: a CNC machining mechanism for an automobile speed change shaft proposed by the present invention comprises: a machine tool; a pair of turning assemblies are connected to the machine tool, respectively used for machining the two ends of the speed change shaft, the machine tool is provided with a track groove slidably connected to the turning assembly, and the machine tool is installed with a first driving mechanism for driving the turning assembly to move; a fixture assembly is fixedly installed on the machine tool, used for clamping and fixing the speed change shaft; a pin assembly is used for pressing against one end of the speed change shaft; a second driving mechanism is used for driving the pin assembly to move; the fixture assembly comprises a fixed seat, the fixed seat is fixedly connected to the machine tool, a rotating seat is rotatably connected to the fixed seat, a rotatable chuck seat is connected to the rotating seat, and a through hole for the speed change shaft to pass through is provided in the center of the chuck seat; and a plurality of clamping assemblies are connected to both end surfaces of the chuck seat, used for clamping and fixing the speed change shaft, and the clamping assemblies are evenly distributed along the circumference of the chuck seat.

[0006] As a preferred technical solution of the present invention, the clamping assembly includes a clamping seat, the chuck seat is provided with a spiral strip slidably connected to the clamping seat, used to drive the clamping seat to move toward the center of the chuck seat, and the rotating seat is fixedly connected to a guide rod, and the clamping seat is fixedly connected to a guide frame slidably connected to the guide rod.

[0007] As a preferred technical solution of the present invention, a slider is slidably connected to the clamping seat, a rotating shaft is rotatably connected to the slider, a wheel frame is fixedly connected to the lower end of the rotating shaft, a pressure wheel is rotatably connected to the wheel frame, and the direction of the pressure wheel can be changed when the rotating shaft rotates.

[0008] As a preferred technical solution of the present invention, the rotating shaft is coaxially fixedly connected with a cylinder, a spiral groove is provided on the surface of the cylinder, and a sliding block slidably connected to the spiral groove is connected to the guide frame. When the sliding block slides in the spiral groove, it drives the rotating shaft to rotate.

[0009] As a preferred technical solution of the present invention, a slide bar is fixedly connected to the slider, a guide block slidably connected to the slide bar is fixedly connected to the guide frame, and a cylindrical spring is connected to the surface of the slide bar.

[0010] As a preferred technical solution of the present invention, a first gear ring is fixedly connected to the periphery of the rotating seat, a first drive motor is fixedly installed on the fixed seat, and a first gear meshing with the first gear ring is connected to the first drive motor; a second gear ring is fixedly connected to the chuck seat, a second drive motor is fixedly installed on the rotating seat, and a second gear meshing with the second gear ring is connected to the second drive motor.

[0011] As a preferred technical solution of the present invention, the turning assembly includes a first slide, a first driving mechanism capable of driving the first slide to move, a third driving mechanism is fixedly installed on the first slide, a moving seat is connected to the third driving mechanism, a fixed arm is fixedly connected to the moving seat, a shaft seat is fixedly connected to the fixed arm, a rotating motor is fixedly installed on the shaft seat, a rotating seat is connected to the rotating shaft of the rotating motor, and a plurality of turning tools are evenly fixedly installed on the rotating seat along its circumference.

[0012] As a preferred technical solution of the present invention, the ejector assembly includes a second slide, the second driving mechanism drives the second slide to move, the second slide is connected to a rotating arm, one end of the rotating arm is fixedly connected to an ejector seat, and a pair of ejectors are symmetrically fixedly connected on both sides of the ejector seat.

[0013] As a preferred technical solution of the present invention, a driven gear is fixedly connected to the rotating arm, a servo motor is fixedly installed on the second slide, a driving gear meshing with the driven gear is connected to the servo motor, and a lifting mechanism is installed on the second slide, and a block that can engage with the driven gear is connected to the lifting mechanism.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention uses a clamp assembly and a pair of turning assemblies. The clamp assembly can clamp and fix the speed change shaft. After the turning assembly processes one end of the speed change shaft, the direction of the pressure wheel on the clamp assembly can be changed to drive the speed change shaft to move without disassembling the speed change shaft, thereby increasing the exposed length of the other end of the speed change shaft, making it convenient for the turning assembly to process the other end of the speed change shaft, and improving the processing efficiency and accuracy of the speed change shaft.

[0016] 2. The ejector assembly of the present invention is provided with a rotating arm and two ejectors, which can respectively tighten the two ends of the speed change shaft, and the ejector assembly is driven to move by the second driving mechanism, which can drive the speed change shaft to move axially in the fixture assembly, thereby facilitating the processing of the two ends of the speed change shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of the numerical control machining mechanism for the automobile transmission shaft.

[0018] Figure 2 This is a schematic structural diagram of the turning assembly proposed in the present invention.

[0019] Figure 3 This is a schematic structural diagram of the clamp assembly proposed in the present invention.

[0020] Figure 4 This is a schematic diagram of the clamp assembly proposed by the present invention from another angle.

[0021] Figure 5 This is a schematic structural diagram of the clamping assembly proposed in the present invention.

[0022] Figure 6 This is a schematic structural diagram of the ejector pin assembly proposed in the present invention.

[0023] In the figure: 1, machine tool; 2, turning assembly; 21, first slide; 22, third driving mechanism; 23, moving seat; 24, fixed arm; 25, shaft seat; 26, rotating motor; 27, rotating seat; 28, turning tool; 3, ejector assembly; 31, second slide; 32, rotating arm; 33, ejector seat; 34, ejector; 35, driven gear; 36, driving gear; 37, servo motor; 38, lifting mechanism; 39, clamping block; 4, fixture assembly; 41, fixed seat; 42, rotating seat; 43, chuck seat; 44, pressing assembly; 441 , clamping seat; 442, guide frame; 443, slider; 444, cylinder; 445, wheel frame; 446, pressure wheel; 447, spiral groove; 448, sliding block; 449, guide block; 4410, slide rod; 4411, cylindrical spring; 4412, rotating shaft; 45, spiral strip; 46, guide rod; 47, first gear ring; 48, first drive motor; 49, first gear; 410, second drive motor; 411, second gear; 412, second gear ring; 5, track groove; 6, first drive mechanism; 7, second drive mechanism. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Embodiment: This embodiment discloses a CNC machining mechanism for a vehicle transmission shaft, such as Figure 1-Figure 6 As shown, it includes: a machine tool 1; a pair of turning assemblies 2 are connected to the machine tool 1, which are respectively used to process the two ends of the speed change shaft, the machine tool 1 is provided with a track groove 5 slidably connected to the turning assembly 2, and the machine tool 1 is installed with a first driving mechanism 6 for driving the turning assembly 2 to move, and the first driving mechanism 6 is provided with two, which are respectively used to drive the two turning assemblies 2 to move, and the first driving mechanism 6 is driven by a motor and a screw; a clamp assembly 4 is fixedly installed on the machine tool 1, and is used to clamp and fix the speed change shaft; a pin assembly 3 is used to press against one end of the speed change shaft; a second driving mechanism 7 is used to drive the pin assembly 3 to move, and the second driving mechanism 7 is also driven by a motor and a screw, and the pin assembly 3 also plays a role in driving the speed change shaft to move, and the driving directions of the first driving mechanism 6 and the second driving mechanism 7 are parallel.

[0026] like Figure 2As shown, the turning assembly 2 includes a first slide 21, and the first driving mechanism 6 can drive the first slide 21 to move. A third driving mechanism 22 is fixedly installed on the first slide 21, and the driving direction of the third driving mechanism 22 is perpendicular to the driving direction of the first driving mechanism 6. The third driving mechanism 22 is connected to a moving seat 23, and a fixed arm 24 is fixedly connected to the moving seat 23, and a shaft seat 25 is fixedly connected to the fixed arm 24. A rotating motor 26 is fixedly installed on the shaft seat 25, and the rotating motor 26 has a self-locking function inside. A rotating seat 27 is connected to the rotating shaft of the rotating motor 26, and a plurality of turning tools 28 are evenly fixedly installed on the rotating seat 27 along its circumference. The models and functions of the turning tools 28 are different. The rotating seat 27 is driven to rotate by the rotating motor 26, thereby driving different turning tools 28 to process the speed change shaft.

[0027] like Figure 3-Figure 5 As shown, the clamp assembly 4 includes a fixed seat 41, the fixed seat 41 is fixedly connected to the machine tool 1, a rotating seat 42 is rotatably connected inside the fixed seat 41, a rotatable chuck seat 43 is connected inside the rotating seat 42, both ends of the chuck seat 43 are exposed from the rotating seat 42, and a through hole for the speed change shaft to pass through is provided in the center of the chuck seat 43; and a plurality of clamping assemblies 44 are connected to both end surfaces of the chuck seat 43 for clamping and fixing the speed change shaft, and three clamping assemblies 44 are provided on each side of the chuck seat 43, and the clamping assemblies 44 are evenly distributed along the circumference of the chuck seat 43, wherein the clamping assemblies Component 44 includes a clamping seat 441, and a spiral bar 45 is provided on the chuck seat 43 and is slidably connected to the clamping seat 441. The cross-section of the spiral bar 45 is T-shaped, so that the clamping seat 441 will not be separated from the spiral bar 45. When the chuck seat 43 rotates, it can drive the clamping seat 441 to move toward the center of the chuck seat 43, and a guide rod 46 is fixedly connected to the rotating seat 42, and the guide rod 46 faces the center of the chuck seat 43. A guide frame 442 is fixedly connected to the clamping seat 441 and is slidably connected to the guide rod 46 to keep the movement of the clamping seat 441 stable.

[0028] The clamping seat 441 is slidably connected with a slider 443, and the clamping seat 441 is provided with a slide groove that slidably cooperates with the slider 443. The slider 443 is rotatably connected with a rotating shaft 4412, and a wheel frame 445 is fixedly connected to the lower end of the rotating shaft 4412. A pressure wheel 446 is rotatably connected to the wheel frame 445. When the rotating shaft 4412 rotates, the direction of the pressure wheel 446 can be changed, and when the slider 443 is raised or lowered, the pressure wheel 446 can be driven to rise or fall; the rotating shaft 4412 is coaxially fixedly connected with a cylinder 444, and a spiral groove 447 is provided on the surface of the cylinder 444. The guide frame 442 is connected with a guide groove that is rotatably matched with the spiral groove The sliding block 448 is slidably connected to the spiral groove 447, and the sliding block 448 drives the rotating shaft 4412 to rotate when sliding in the spiral groove 447. The sliding block 448 is fixedly connected to the sliding block 443, and the guide frame 442 is fixedly connected to the guide block 449 which is slidably connected to the sliding rod 4410, and the surface of the sliding rod 4410 is connected to a cylindrical spring 4411, wherein the chuck seat 43 is fixedly connected to the second gear ring 412, and the rotating seat 42 is fixedly installed with a second driving motor 410, and the second driving motor 410 is connected to the second gear 411 which meshes with the second gear ring 412, and the upper surface of the rotating seat 42 is provided with The second drive motor 410 drives the chuck seat 43 to rotate, and the chuck seat 43 drives the multiple clamping seats 441 to move toward the center of the circle when the chuck seat 43 rotates. The pressure wheel 446 first contacts the surface of the speed shaft. As the clamping seat 441 continues to move, the cylindrical spring 4411 is compressed by force, and at the same time drives the sliding block 448 to slide in the spiral groove 447, driving the cylinder 444 and the rotating shaft 4412 to rotate, thereby changing the direction of the pressure wheel 446, so that the direction of the pressure wheel 446 changes by 90 degrees, and at the same time the clamping seat 441 contacts the speed shaft, and the speed shaft is tightened. The speed shaft is clamped and fixed; when one end of the speed shaft is processed, the speed shaft needs to be moved axially. At this time, the chuck seat 43 can be driven to rotate in the reverse direction by the second drive motor 410, driving the clamping seat 441 away from the speed shaft. The clamping seat 441 is first separated from the speed shaft, and according to the principle of the clamping seat 441, the cylinder 444 is driven to rotate in the reverse direction, and then the direction of the pressure wheel 446 is changed to face the axial direction of the speed shaft, so that the speed shaft can move axially under compression, and the other end of the speed shaft is completely exposed, and then the speed shaft is clamped and fixed, so as not to change the axial position of the speed shaft, thereby ensuring the processing accuracy of the speed shaft.

[0029] Preferably, a first gear ring 47 is fixedly connected to the periphery of the rotating seat 42, a first drive motor 48 is fixedly installed on the fixed seat 41, and the first drive motor 48 is connected to a first gear 49 meshing with the first gear ring 47; during processing, the rotating seat 42 is driven to rotate by the first drive motor 48, thereby driving the speed change shaft to rotate in a circular motion.

[0030] like Figure 6As shown, the ejector assembly 3 includes a second slide 31, and the second driving mechanism 7 drives the second slide 31 to move. The second slide 31 is connected to a rotating arm 32, and one end of the rotating arm 32 is fixedly connected to an ejector seat 33. A pair of ejectors 34 are symmetrically fixedly connected to the ejector seat 33 on both sides, and a driven gear 35 is fixedly connected to the rotating arm 32. A servo motor 37 is fixedly installed on the second slide 31, and a driving gear 36 meshing with the driven gear 35 is connected to the servo motor 37. A lifting mechanism 38 is installed, and a block 39 that can engage with the driven gear 35 is connected to the lifting mechanism 38; the servo motor 37 drives the rotating arm 32 to rotate, so that the ejector assembly 3 can move from one side of the clamp assembly 4 to the other side to avoid obstruction, and then the servo motor 37 drives the rotating arm 32 to rotate to the original position, the ejector 34 presses the other end of the speed change shaft, and the lifting mechanism 38 drives the block 39 to engage with the driven gear 35, ensuring the stable position of the rotating arm 32 during operation.

[0031] Working principle: one end of the speed change shaft is clamped and fixed by the clamp assembly 4, and the other end of the speed change shaft is pressed by the ejector assembly 3. The first drive motor 48 drives the rotating seat 42 to rotate, thereby driving the speed change shaft to rotate. One of the turning assemblies 2 performs turning processing on one end of the speed change shaft. After the processing is completed, the clamp assembly 4 relaxes the speed change shaft, the clamping seat 441 is separated from the speed change shaft, and the pressure wheel 446 is always pressed on the surface of the speed change shaft to keep the axis position of the speed change shaft unchanged. The ejector assembly 3 is driven to move by the second driving mechanism 7, and then the other end of the speed change shaft is driven to move to the specified position to avoid the middle position of the speed change shaft from being processed. Then the clamp assembly 4 clamps and fixes the speed change shaft again, and then the ejector assembly 3 moves to the other side of the clamp assembly 4 to press the other end of the speed change shaft. Another turning assembly 2 processes the other end surface of the speed change shaft. The whole process does not require the disassembly and installation of the speed change shaft, thereby ensuring that the axis position of the speed change shaft remains unchanged, thereby improving the processing efficiency and accuracy of the surfaces of the two ends of the speed change shaft.

[0032] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. 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 cannot be understood as limitations on the present invention.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Automobile transmission shaft CNC machining mechanism, characterized in that: include: Machine tools (1); The machine tool (1) is connected to a pair of turning assemblies (2) for processing the two ends of the speed change shaft respectively; the machine tool (1) is provided with a track groove (5) slidably connected to the turning assemblies (2); and the machine tool (1) is installed with a first driving mechanism (6) for driving the turning assemblies (2) to move; A clamp assembly (4) is fixedly mounted on the machine tool (1) and is used to clamp and fix the speed change shaft; The ejector pin assembly (3) is used to tighten against one end of the speed change shaft; A second driving mechanism (7) is used to drive the ejector assembly (3) to move; The clamp assembly (4) comprises a fixed seat (41), the fixed seat (41) is fixedly connected to the machine tool (1), a rotating seat (42) is rotatably connected inside the fixed seat (41), a rotatable chuck seat (43) is connected inside the rotating seat (42), and a through hole for a speed change shaft to pass through is provided at the center of the chuck seat (43); Both end surfaces of the chuck seat (43) are connected to a plurality of clamping assemblies (44) for clamping and fixing the speed change shaft, and the clamping assemblies (44) are evenly distributed along the circumference of the chuck seat (43); The clamping assembly (44) comprises a clamping seat (441), the chuck seat (43) is provided with a spiral strip (45) slidably connected to the clamping seat (441) and used to drive the clamping seat (441) to move toward the center of the chuck seat (43), and the rotating seat (42) is fixedly connected to a guide rod (46), and the clamping seat (441) is fixedly connected to a guide frame (442) slidably connected to the guide rod (46); The clamping seat (441) is slidably connected to a slider (443), the slider (443) is rotatably connected to a rotating shaft (4412), the lower end of the rotating shaft (4412) is fixedly connected to a wheel frame (445), the wheel frame (445) is rotatably connected to a pressure wheel (446), and the rotation shaft (4412) can change the direction of the pressure wheel (446) when rotating; A first gear ring (47) is fixedly connected to the periphery of the rotating seat (42); a first drive motor (48) is fixedly mounted on the fixed seat (41); and a first gear (49) meshing with the first gear ring (47) is connected to the first drive motor (48); a second gear ring (412) is fixedly connected to the chuck seat (43); a second drive motor (410) is fixedly mounted on the rotating seat (42); and a second gear (411) meshing with the second gear ring (412) is connected to the second drive motor (410).

2. The automobile transmission shaft numerical control machining mechanism according to claim 1, characterized in that: The rotating shaft (4412) is coaxially fixedly connected to a cylinder (444), a spiral groove (447) is provided on the surface of the cylinder (444), and a sliding block (448) slidably connected to the spiral groove (447) is connected to the guide frame (442), and when the sliding block (448) slides in the spiral groove (447), it drives the rotating shaft (4412) to rotate.

3. The automobile transmission shaft numerical control machining mechanism according to claim 2, characterized in that: The sliding block (443) is fixedly connected to a sliding rod (4410), the guide frame (442) is fixedly connected to a guide block (449) slidably connected to the sliding rod (4410), and a cylindrical spring (4411) is connected to the surface of the sliding rod (4410).

4. The automobile transmission shaft numerical control machining mechanism according to claim 3, characterized in that: The turning assembly (2) comprises a first slide (21), a first driving mechanism (6) capable of driving the first slide (21) to move, a third driving mechanism (22) being fixedly mounted on the first slide (21), a moving seat (23) being connected to the third driving mechanism (22), a fixed arm (24) being fixedly connected to the moving seat (23), a shaft seat (25) being fixedly connected to the fixed arm (24), a rotating motor (26) being fixedly mounted on the shaft seat (25), a rotating shaft of the rotating motor (26) being connected to a rotating seat (27), and a plurality of turning tools (28) being fixedly mounted on the rotating seat (27) uniformly along its circumference.

5. The automobile transmission shaft numerical control machining mechanism according to claim 4, characterized in that: The ejector assembly (3) comprises a second slide (31), the second drive mechanism (7) drives the second slide (31) to move, the second slide (31) is connected to a rotating arm (32), one end of the rotating arm (32) is fixedly connected to an ejector seat (33), and a pair of ejectors (34) are symmetrically fixedly connected to both sides of the ejector seat (33).

6. The automobile transmission shaft numerical control machining mechanism according to claim 5, characterized in that: A driven gear (35) is fixedly connected to the rotating arm (32), a servo motor (37) is fixedly mounted on the second slide seat (31), a driving gear (36) meshing with the driven gear (35) is connected to the servo motor (37), and a lifting mechanism (38) is mounted on the second slide seat (31), and a clamping block (39) capable of clamping with the driven gear (35) is connected to the lifting mechanism (38).

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