Grinding equipment for machining automobile part planetary gear shaft

Abstract

The invention relates to the technical field of gear shaft machining, in particular to grinding equipment for automobile part planetary gear shaft machining, which comprises a base, a spring chuck part, a tip part and a grinding part are mounted on the base, the spring chuck part and the tip part are oppositely arranged in the left-right direction, and an electric sliding seat is mounted in the middle of the upper end of the base. A front supporting part and a rear supporting part are respectively mounted at the front and rear ends of the upper side of the electric sliding seat; by arranging the front supporting part and the rear supporting part, the layout of supporting points is adjusted according to the grinding position of the planetary gear shaft, and when the right end of the planetary gear shaft is ground, the front supporting part forms stable three-point supporting on the right front side of the grinding position of the planetary gear shaft; the front supporting part and the rear supporting part form four-point supporting which is symmetrical front and back on the outer side of the ground surface of the planetary gear shaft, and the supporting position can synchronously move along with the grinding position, so that elastic deformation and vibration of the slender planetary gear shaft in the grinding process are effectively restrained, and the machining precision and the surface quality are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of gear shaft machining technology, specifically to grinding equipment for machining planetary gear shafts for automotive parts. Background Technology

[0002] Planetary gear shafts, as key components of transmission systems such as automotive gearboxes, are typically slender shaft structures. Planetary gear shafts require high dimensional accuracy, geometric accuracy, and surface roughness to ensure smooth transmission and long service life. The machining process consists of rough turning, heat treatment, and precision grinding. Among these steps, precision grinding is the core process that determines the key accuracy indicators of planetary gear shafts, such as surface roughness, roundness, cylindricity, and coaxiality.

[0003] Currently, grinding machines are commonly used to grind planetary gear shafts. The grinding machine uses a spring collet and a tailstock center support to clamp and fix the planetary gear shaft. The spring collet drives the planetary gear shaft to rotate, and grinding tools such as grinding wheels are used to grind the outer diameter of the planetary gear shaft.

[0004] The following problems exist in the current grinding process of planetary gear shafts: For planetary gear shafts with a large length-to-diameter ratio, when the grinding wheel grinds to the end away from the rigid clamping spring collet, the planetary gear shaft mainly relies on the tailstock center for auxiliary support, and the overall rigidity of this area is significantly insufficient; under the continuous action of the grinding wheel force, the planetary gear shaft is prone to bending elastic deformation and vibration, and this phenomenon is aggravated as the length-to-diameter ratio of the planetary gear shaft increases, which in turn makes the surface of the planetary gear shaft prone to problems such as vibration marks and out-of-tolerance shape accuracy, resulting in a reduction in the grinding accuracy of the planetary gear shaft. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a grinding equipment for processing planetary gear shafts of automotive parts, comprising a base, on which a spring clamp head, a center point, and a grinding part are mounted. The spring clamp head and the center point are arranged opposite each other in the left-right direction. An electric slide is mounted on the upper middle part of the base, and a front support part and a rear support part are respectively mounted on the front and rear ends of the upper side of the electric slide. The rear support part includes a drive assembly mounted on the electric slide, on which two rear support wheels are mounted symmetrically arranged vertically. The drive assembly is used to drive the rear support wheels to move forward and abut against the outside of the planetary gear shaft. The front support part includes an adjustable... The slide plate is mounted on the electric slide block and slides back and forth. A square slide rod is mounted on the upper end of the slide plate and slides left and right via an electric slider assembly. A pusher assembly is mounted on the square slide rod, and two front support wheels are mounted on the pusher assembly. An auxiliary support wheel is mounted on the pusher assembly and located between the two front support wheels. When grinding the right end of the planetary gear shaft, the square slide rod is driven to move to the left, so that the pusher assembly drives the auxiliary support wheel and the front support wheel to abut against the front side of the planetary gear shaft grinding position, forming a three-point support. When grinding the middle part of the planetary gear shaft, the square slide rod is reset, so that the front support wheel and the rear support wheel abut against the outside of the planetary gear shaft, forming a four-point support.

[0006] Preferably, a first groove is provided on the right side of the upper rear end of the electric slide block, and a second groove is provided on the front end of the upper side of the electric slide block, and the slide plate is slidably installed in the second groove.

[0007] Preferably, the drive assembly includes an adjusting block that slides back and forth in a slide groove. An adjusting screw is installed between the adjusting block and the electric slide. The adjusting screw is fixedly connected to the output shaft of a servo motor fixedly installed at the rear end of the electric slide. A square fixing rod is fixedly installed on the upper end of the adjusting block. The upper front end of the square fixing rod is connected to the corresponding rear support wheel through a fixing frame.

[0008] Preferably, the adjustment assembly includes an adjustment screw two that is threadedly connected to the slide plate, and the adjustment screw two is rotatably connected to the electric slide block. The front end of the adjustment screw two is fixedly connected to the output shaft of the servo motor two that is fixedly mounted on the electric slide block.

[0009] Preferably, the pushing assembly includes pushing blocks distributed on the upper front side of the square slide rod, and a pushing plate is slidably installed at the middle rear end of the pushing block. The front end of the pushing plate slides through the square slide rod and is connected to the auxiliary support wheel.

[0010] Preferably, an L-shaped rod is fixedly installed at the front end of the push block, and the vertical section of the L-shaped rod and the guide rod fixedly installed at the rear end of the square slide rod are slidably connected. A mating block is fixedly installed at the lower end of the vertical section of the L-shaped rod, and a mating groove is opened at the upper end of the slide plate corresponding to the position of the mating block. The left end of the mating groove is tilted backward, and the mating block is slidably installed in the mating groove.

[0011] Preferably, a square hole is provided at the center of the front end of the pusher block, and the pusher plate is slidably installed in the square hole by means of a top extension spring.

[0012] Preferably, a limiting screw is threadedly connected to the center of the front end of the push block. By adjusting the front and rear positions of the limiting screw and cooperating with the push plate, the auxiliary support wheel can provide rigid support for planetary gear shafts of different diameters.

[0013] Preferably, the square slide bar has two symmetrically arranged connecting holes, and a connecting frame slides up and down in the connecting holes. The rear end of the connecting frame is connected to the corresponding front support wheel.

[0014] Preferably, the rear side of the push block is trapezoidal, and the front end of the connecting frame has an inclined groove that matches the inclined surface of the trapezoid of the push block. A guide block is fixedly installed on the inclined groove of the connecting frame, and the guide block is slidably connected to the inclined surface of the corresponding push block trapezoid.

[0015] The beneficial effects of this invention are as follows: First, by setting a front support and a rear support, the layout of the support points is adjusted according to the grinding position of the planetary gear shaft. When grinding the planetary gear shaft near the tip, the front support wheel and the auxiliary support wheel are driven to abut against the front side of the grinding position of the planetary gear shaft, forming a stable three-point support. This effectively suppresses the elastic deformation and vibration caused by the long overhang at the end of the planetary gear shaft. When grinding the middle part of the planetary gear shaft, the front support wheel and the rear support wheel are driven to form a symmetrical four-point support on the outer side of the ground surface of the planetary gear shaft. The support position can move synchronously with the grinding position, realizing full-process rigid reinforcement of the grinding area of ​​the planetary gear shaft. This can significantly suppress the bending elastic deformation and grinding vibration of the planetary gear shaft, thereby preventing problems such as vibration marks and shape accuracy deviations on the surface of the planetary gear shaft, and ensuring the grinding accuracy of the planetary gear shaft.

[0016] 2. When grinding the planetary gear shaft near the tip, this invention controls the square slide bar to move to the left, causing the square slide bar to move the front support wheel and auxiliary support wheel to the front of the planetary gear shaft grinding position. The pushing assembly can also cause the auxiliary support wheel and the front support wheel to jointly abut against the front side of the planetary gear shaft grinding position, thereby forming a three-point support in front of the planetary gear shaft grinding position to overcome the elastic deformation and vibration during end grinding. When grinding the middle of the planetary gear shaft, a drive assembly is set to drive the two rear support wheels to move forward and abut against the rear side of the planetary gear shaft. At the same time, the adjustment assembly drives the two front support wheels to abut against the front side of the planetary gear shaft through the sliding plate. The front support wheels and rear support wheels are arranged symmetrically, thus forming a stable four-point support. The electric slide can drive the front support wheels and rear support wheels to move synchronously with the planetary gear shaft grinding position, improving the rigidity of the planetary gear shaft grinding position.

[0017] Third, this invention, by setting the push plate to drive the auxiliary support wheel to elastically press against the surface of the planetary gear shaft under the elastic force of the top extension spring, can automatically adapt to planetary gear shafts of different diameters. Then, by turning the limiting screw, the front end position of the push plate can be mechanically locked, thereby converting the elastic support of the auxiliary support wheel into a rigid support, so that the auxiliary support wheel can support planetary gear shafts of different diameters, increasing the applicability of this invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the electric slide, front support wheel, and rear support wheel of the present invention.

[0021] Figure 3 This is a left view of the skateboard after the portion has been cut away according to the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the present invention after removing parts of the square sliding rod and the pushing block.

[0023] Figure 5 This is a top view of the present invention after the portion of the push block has been removed.

[0024] Figure 6 This is a state diagram of the grinding process of the middle part of the planetary gear shaft according to the present invention.

[0025] Figure 7 This is a diagram showing the state changes during the grinding process of the right end of the planetary gear shaft according to the present invention.

[0026] Reference numerals: 1. Base; 2. Spring clip head; 3. Center point; 4. Grinding part; 5. Electric slide; 6. Front support part; 61. Adjustment group; 611. Adjustment screw two; 62. Slide plate; 63. Square slide rod; 631. Connecting frame; 632. Guide block; 64. Pushing group; 641. Pushing block; 642. Pushing plate; 643. L-shaped rod; 644. Guide rod; 645. Mating block; 646. Top extension spring; 647. Limiting screw; 65. Front support wheel; 66. Auxiliary support wheel; 7. Rear support part; 71. Drive group; 711. Adjustment block; 712. Adjustment screw one; 713. Square fixing rod; 714. Fixing frame; 72. Rear support wheel. Detailed Implementation

[0027] The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. Where no specific technology or conditions are specified in the embodiments, they shall be performed in accordance with the technology or conditions described in the literature in the field or in accordance with the product manual.

[0028] See Figure 1 Grinding equipment for processing planetary gear shafts of automotive parts includes a base 1, on which a spring clamp head 2, a center point 3 and a grinding part 4 are mounted. The spring clamp head 2 and the center point 3 are arranged opposite each other in the left-right direction. An electric slide 5 is mounted in the middle of the upper end of the base 1. A front support part 6 and a rear support part 7 are respectively mounted at the front and rear ends of the upper side of the electric slide 5.

[0029] It should be noted that the spring clamp head 2, the tip 3, and the grinding part 4 all adopt existing technologies. Among them, the spring clamp head 2 includes multiple radially retractable elastic jaws. During operation, the elastic jaws are driven to generate radial contraction, thereby uniformly clamping and holding the left end of the planetary gear shaft from the circumferential direction. While providing strong radial clamping force, the spring clamp head 2 drives the clamped planetary gear shaft to perform high-speed and precise rotational motion through the machine tool spindle.

[0030] The tip 3 includes a tailstock mounted on a guide rail of the base 1 that can move left and right. A high-precision rotary tip is mounted on the left end of the tailstock. The tapered tip of the tip is used to insert into the pre-machined center hole at the right end of the planetary gear shaft. The axial clamping force of the tip can be adjusted to apply an appropriate axial clamping force to the planetary gear shaft. The rotary tip can rotate synchronously with the planetary gear shaft, thereby providing stable axial support while avoiding sliding friction and heat accumulation with the end face of the planetary gear shaft.

[0031] The grinding section 4 uses a high-speed rotating grinding wheel to grind the planetary gear shaft. The grinding wheel of the grinding section 4 can move circumferentially along the surface of the planetary gear shaft to perform precision grinding on the entire surface of the planetary gear shaft.

[0032] It should be further explained that the electric slide 5 is a standardized linear slide capable of linear reciprocating motion. Its specific mechanical structure and driving principle are well known to those skilled in the art and will not be described in detail here. The movement of the electric slide 5 is electrically synchronized with the axial movement of the grinding section 4. During the grinding process, when the grinding wheel of the grinding section 4 moves axially along the planetary gear shaft to grind different sections, the CNC system of the equipment will send a coordination command to the electric slide 5, causing it to drive the front support 6 and the rear support 7 to move synchronously with the grinding position. The front support 6 and the rear support 7 are always located to the right of the grinding wheel. This synchronization can be achieved through CNC programming.

[0033] See Figure 1 , Figure 2 and Figure 3The rear support 7 includes a drive assembly 71 mounted on the electric slide block 5, and two rear support wheels 72 arranged symmetrically in the upper and lower parts are mounted on the drive assembly 71. The front support 6 includes a slide plate 62 that is slidably mounted on the electric slide block 5 via an adjustment assembly 61. A square slide rod 63 is slidably mounted on the upper end of the slide plate 62 via an electric slider assembly. A pushing assembly 64 is mounted on the square slide rod 63. Two front support wheels 65 arranged symmetrically in the upper and lower parts are mounted on the pushing assembly 64. An auxiliary support wheel 66 is mounted on the pushing assembly 64 and located between the two front support wheels 65.

[0034] When grinding the right end of the planetary gear shaft, the front support 6 forms a stable three-point support on the front side of the grinding position of the planetary gear shaft, effectively suppressing the elastic deformation and vibration caused by the long overhang of the planetary gear shaft end. When grinding the middle part of the planetary gear shaft, the front support 6 and the rear support 7 cooperate to form a symmetrical four-point support on the outside of the planetary gear shaft. The front support 6 and the rear support 7 can move synchronously with the grinding position of the grinding part 4, realizing full-process rigid reinforcement of the grinding area of ​​the planetary gear shaft. This significantly suppresses the bending elastic deformation and grinding vibration of the planetary gear shaft, thereby preventing problems such as vibration marks and shape accuracy deviations on the surface of the planetary gear shaft, and ensuring the grinding accuracy of the planetary gear shaft.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 Specifically, when grinding the planetary gear shaft, the planetary gear shaft is first clamped and fixed by the spring clamp head 2 and the center point 3. The grinding wheel of the grinding unit 4 is moved to the right end of the planetary gear shaft, and the electric slide block 5 is moved to the right. Then, the electric slider assembly is controlled to move the square slide bar 63 to the left. The square slide bar 63 drives the front support wheel 65 and the auxiliary support wheel 66 to the left through the push assembly 64, so that the front support wheel 65 and the auxiliary support wheel 66 are located in front of the grinding wheel of the grinding unit 4. Then, the adjustment assembly 61 is controlled to move the slide plate 62 backward. The slide plate 62 drives the front support wheel 65 and the auxiliary support wheel 66 to move backward through the square slide bar 63. Under the action of the push assembly 64, the auxiliary support wheel 66 and the front support wheel 65 rigidly abut against the front side of the planetary gear shaft grinding position, forming a three-point support.

[0036] The grinding wheel of the driving grinding unit 4 moves to the left, so that the grinding wheel continuously grinds the surface of the planetary gear shaft. The driving electric slide 5 moves to the left in sync. The electric slide 5 drives the rear support wheel 72 and the front support wheel 65 to move to the left. When the rear support wheel 72 moves to the corresponding position on the right end of the planetary gear shaft, the electric slider assembly is controlled to drive the square slide bar 63 to reset to the right, so that the front support wheel 65 and the auxiliary support wheel 66 move to the right to the initial position. At the same time, the adjusting group 61 is controlled to drive the slide plate 62 to move backward, so that the front support wheel 65 can always be in contact with the front side of the planetary gear shaft.

[0037] After the current support wheel 65 moves to the right to its initial position, the rear support wheel 72 and the front support wheel 65 are arranged symmetrically. Then, the control drive group 71 drives the rear support wheel 72 to move forward and abut against the rear side of the planetary gear shaft, so that the front support wheel 65 and the rear support wheel 72 abut against the outer side of the ground surface of the planetary gear shaft, forming a symmetrical four-point support. At the same time, it ensures that the front support wheel 65 and the rear support wheel 72 provide high-precision support for the planetary gear shaft. The electric slide 5 drives the front support wheel 65 and the rear support wheel 72 to move synchronously with the grinding wheel of the grinding part 4, realizing full-process rigid reinforcement of the planetary gear shaft grinding area. After the planetary gear shaft grinding is completed, the planetary gear shaft is removed from the spring clip head 2 and the center part 3, thus completing the grinding of the planetary gear shaft.

[0038] It should be noted that when the front support wheel 65 and the rear support wheel 72 move axially along the planetary gear shaft with the electric slide 5, There is axial sliding friction between the surfaces of the front support wheel 65 and the rear support wheel 72 and the surface of the planetary gear shaft. However, since the contact between the surfaces of the front support wheel 65 and the rear support wheel 72 and the surface of the planetary gear shaft is line contact, and the surfaces of the front support wheel 65 and the rear support wheel 72 are both in contact with the ground surface of the planetary gear shaft, the ground surface of the planetary gear shaft is relatively smooth, resulting in low friction between the surfaces of the front support wheel 65 and the rear support wheel 72 and the surface of the planetary gear shaft. At the same time, during the grinding of the planetary gear shaft, it is usually necessary to continuously spray coolant, and the coolant also has a certain lubricating property, which further reduces the friction between the surfaces of the front support wheel 65 and the rear support wheel 72 and the surface of the planetary gear shaft. Therefore, the circumferential sliding friction between the surfaces of the front support wheel 65 and the rear support wheel 72 and the surface of the planetary gear shaft will not affect the grinding of the planetary gear shaft.

[0039] See Figure 2The electric slide block 5 has a groove on the right side of its upper rear end. The drive assembly 71 includes an adjusting block 711 that slides back and forth in the groove. An adjusting screw 712 is installed between the adjusting block 711 and the electric slide block 5. The adjusting screw 712 and the adjusting block 711 are threaded together. The adjusting screw 712 is fixedly connected to the output shaft of a servo motor fixedly installed at the rear end of the electric slide block 5. A square fixing rod 713 is fixedly installed on the upper end of the adjusting block 711. The upper front end of the square fixing rod 713 is connected to the corresponding rear support wheel 72 through a fixing bracket 714. When the servo motor is started, it drives the adjusting screw 712 to rotate. The adjusting screw 712 drives the adjusting block 711 and the square fixing rod 713 to move forward precisely, so that the square fixing rod 713 drives the rear support wheel 72 to precisely abut against the rear side of the planetary gear shaft through the fixing bracket 714.

[0040] See Figure 2 The electric slide block 5 has a second sliding groove at its front end, and the slide plate 62 is slidably installed in the second sliding groove. The adjustment group 61 includes an adjustment screw 611 that is threadedly connected to the slide plate 62, and the adjustment screw 611 is rotatably connected to the electric slide block 5. The front end of the adjustment screw 611 is fixedly connected to the output shaft of the servo motor 62 that is fixedly installed on the electric slide block 5. When the servo motor 62 is started, it drives the adjustment screw 611 to rotate. The adjustment screw 611 drives the slide plate 62 to move precisely backward, so that the slide plate 62 drives the front support wheel 65 to move precisely backward to abut against the front side of the planetary gear shaft.

[0041] To achieve stable support for the right end of the planetary gear shaft during grinding, this invention employs the following structure: (See attached diagram) Figure 2 and Figure 3 The pushing assembly 64 includes a pushing block 641 distributed on the upper front side of the square slide rod 63. A pushing plate 642 is slidably installed at the middle rear end of the pushing block 641. The front end of the pushing plate 642 slides through the square slide rod 63 and is connected to the auxiliary support wheel 66. An L-shaped rod 643 is fixedly installed at the front end of the pushing block 641. The vertical section of the L-shaped rod 643 and the guide rod 644 fixedly installed at the rear end of the square slide rod 63 are slidably connected. A mating block 645 is fixedly installed at the lower end of the vertical section of the L-shaped rod 643. A mating groove is opened at the upper end of the slide plate 62 corresponding to the position of the mating block 645. The left end of the mating groove is inclined backward. The mating block 645 is slidably installed in the mating groove. A reinforcing rib is installed on the L-shaped rod 643 to increase the structural stability of the L-shaped rod 643.

[0042] See Figure 3 and Figure 4The square slide rod 63 has two symmetrically arranged connecting holes, and a connecting frame 631 slides up and down in the connecting holes. The rear end of the connecting frame 631 is connected to the corresponding front support wheel 65. The rear side of the push block 641 is trapezoidal, and the front end of the connecting frame 631 has a groove that matches the inclined surface of the trapezoid of the push block 641. A guide block 632 is fixedly installed on the inclined groove of the connecting frame 631, and the guide block 632 is slidably connected to the inclined surface of the trapezoid of the corresponding push block 641.

[0043] See Figure 2 , Figure 3 , Figure 4 and Figure 7 Specifically, when grinding the right end of the planetary gear shaft, when the electric slider assembly drives the square slide bar 63 to move to the left, the square slide bar 63 drives the push block 641 to move to the left. The square slide bar 63 drives the push block 641 to move synchronously through the guide rod 644 and the L-shaped rod 643. The mating block 645 and the mating groove work together to drive the push block 641 to move forward synchronously through the L-shaped rod 643. The push block 641 drives the auxiliary support wheel 66 to move forward through the push plate 642. At the same time, the inclined surface of the push block 641 and the inclined groove of the connecting frame 631 work together to drive the two front support wheels 65 to move synchronously in a direction away from each other. When the drive slide plate 62 moves backward, the front support wheel 65 and the auxiliary support wheel 66 can abut against the front side of the planetary gear shaft grinding position, forming a stable three-point support. Under the action of the guide block 632, a tight sliding pair is formed between the inclined surface of the push block 641 and the inclined groove of the connecting frame 631, ensuring the support rigidity of the front support wheel 65.

[0044] By moving the two front support wheels 65 to opposite sides, the support points of the two front support wheels 65 are located at the upper and lower ends of the front side of the planetary gear shaft and the distance between them increases, which significantly enhances the ability to resist the overturning moment caused by the grinding force; and the auxiliary support wheel 66 moves backward and is precisely pressed against the front of the grinding point, thereby enhancing the rigid support of the right end of the planetary gear shaft and suppressing the bending elastic deformation and grinding vibration during the grinding process of the end of the planetary gear shaft.

[0045] To ensure that the front support wheel 65 and the auxiliary support wheel 66 can provide rigid three-point support for planetary gear shafts of different diameters, the present invention adopts the following structure, see reference. Figure 4 and Figure 5 The push block 641 has a square hole in the middle of its front end, and the push plate 642 is slidably installed in the square hole through the extension spring 646. The push block 641 has a limit screw 647 threadedly connected to the middle of its front end. When the right end of the planetary gear shaft is being ground, when the drive square slide bar 63 moves to the left, the push block 641 drives the push plate 642 and the front support wheel 65 to move backward through the extension spring 646.

[0046] When the drive slide plate 62 moves backward, the slide plate 62 drives the auxiliary support wheel 66 to elastically abut against the front side of the planetary gear shaft under the action of the extension spring 646. The slide plate 62 drives the front support wheel 65 to rigidly abut against the front side of the planetary gear shaft through the connecting frame 631. Then, the limiting screw 647 is turned to move backward, so that the limiting screw 647 abuts against the rear end of the push plate 642, thereby forming a rigid limit, so that the auxiliary support wheel 66 is rigidly supported on the front side of the planetary gear shaft.

[0047] When grinding the planetary gear shaft, the planetary gear shaft is clamped and fixed by the spring clamp head 2 and the center part 3. When grinding the planetary gear shaft near the right end of the center, the square slide bar 63 is controlled to move to the left. The front support wheel 65 and the auxiliary support wheel 66 are driven to move precisely and rigidly contact the grinding position in front of the grinding position through the push group 64 and the adjustment group 61, forming a stable three-point support that adapts to the end working condition.

[0048] When the grinding area moves to the middle of the planetary gear shaft, the control square slide bar 63 is reset, and the drive group 71 and the adjustment group 61 are started simultaneously, so that the front support wheel 65 and the rear support wheel 72 form a symmetrical four-point support on the outer side of the ground surface, and the electric slide 5 drives the support unit to move synchronously with the grinding part 4. By switching the support mode, following the support position, and adaptive rigid locking for shafts of different diameters, the present invention achieves rigidity enhancement throughout the grinding process of the slender planetary gear shaft, thereby effectively suppressing elastic deformation and vibration, and ensuring the final machining accuracy and surface quality of the parts.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0050] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, an integral connection, or a sliding connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A grinding device for machining a planetary gear shaft of an automobile part, comprising a base, a spring chuck portion, a center portion, and a grinding portion being installed on the base, the spring chuck portion and the center portion being oppositely arranged along a left-right direction, characterized in that, An electric slide is installed at the middle of the upper end of the base, and a front support and a rear support are respectively installed at the front and rear ends of the upper side of the electric slide. The rear support includes a drive assembly mounted on an electric slide block. Two rear support wheels are mounted on the drive assembly and arranged symmetrically in the upper and lower parts. The drive assembly is used to drive the rear support wheels to move forward and abut against the outside of the gear shaft. The front support includes a slide plate that is slidably mounted on an electric slide block via an adjustment assembly. A square slide rod is slidably mounted on the upper end of the slide plate via an electric slider assembly. A pushing assembly is mounted on the square slide rod. Two front support wheels are symmetrically arranged vertically on the pushing assembly. An auxiliary support wheel is mounted on the pushing assembly and located between the two front support wheels. When grinding the right end of the gear shaft, the drive square slide bar moves to the left, causing the push assembly to move the auxiliary support wheel and the front support wheel to abut against the front side of the gear shaft grinding position, forming a three-point support. When grinding the middle part of the gear shaft, the square slide bar is reset, causing the front support wheel and the rear support wheel to abut against the outside of the gear shaft, forming a four-point support.

2. The automobile parts planetary gear shaft machining grinding apparatus according to claim 1, characterized by, The upper rear end of the electric slide block has a first slide groove, and the upper front end of the electric slide block has a second slide groove. The slide plate is slidably installed in the second slide groove.

3. The automobile parts planetary gear shaft machining grinding apparatus according to claim 2, characterized by, The drive assembly includes an adjustment block that slides back and forth in a slide groove. An adjustment screw is installed between the adjustment block and the electric slide base. The adjustment screw is fixedly connected to the output shaft of a servo motor fixedly installed at the rear end of the electric slide base. A square fixing rod is fixedly installed on the upper end of the adjustment block. The upper front end of the square fixing rod is connected to the corresponding rear support wheel through a fixing frame.

4. The automobile parts planetary gear shaft machining grinding apparatus according to claim 1, characterized by, The adjustment assembly includes an adjustment screw two that is threadedly connected to the slide plate, and the adjustment screw two is rotatably connected to the electric slide block. The front end of the adjustment screw two is fixedly connected to the output shaft of the servo motor two that is fixedly mounted on the electric slide block.

5. The automobile parts planetary gear shaft machining grinding apparatus according to claim 1, characterized by, The pushing assembly includes pushing blocks distributed on the upper front side of the square slide rod. A pushing plate is slidably installed at the middle rear end of the pushing block. The front end of the pushing plate slides through the square slide rod and is connected to the auxiliary support wheel.

6. The automobile parts planetary gear shaft machining grinding apparatus according to claim 5, characterized by, An L-shaped rod is fixedly installed at the front end of the push block. The vertical section of the L-shaped rod and the guide rod fixedly installed at the rear end of the square slide rod are slidably connected. A mating block is fixedly installed at the lower end of the vertical section of the L-shaped rod. A mating groove is opened at the upper end of the slide plate corresponding to the position of the mating block. The left end of the mating groove is tilted backward, and the mating block is slidably installed in the mating groove.

7. The grinding equipment for machining planetary gear shafts of automotive parts according to claim 5, characterized in that, A square hole is provided at the center of the front end of the pusher block, and the pusher plate is slidably installed in the square hole by means of a top extension spring.

8. The grinding equipment for machining planetary gear shafts of automotive parts according to claim 5, characterized in that, The front end of the push block is threaded with a limiting screw. By adjusting the front and rear positions of the limiting screw and cooperating with the push plate, the auxiliary support wheel can provide rigid support for gear shafts of different diameters.

9. The grinding equipment for machining planetary gear shafts of automotive parts according to claim 5, characterized in that, The square slide bar has two symmetrically arranged connecting holes, and a connecting frame slides up and down in the connecting holes. The rear end of the connecting frame is connected to the corresponding front support wheel.

10. The grinding equipment for machining planetary gear shafts of automotive parts according to claim 9, characterized in that, The rear side of the push block is trapezoidal, and the front end of the connecting frame has an inclined groove that matches the inclined surface of the trapezoid of the push block. A guide block is fixedly installed on the inclined groove of the connecting frame, and the guide block is slidably connected to the inclined surface of the corresponding push block trapezoid.

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