A wheel axle processing device for transportation equipment with an automatic clamping and loading structure

Abstract

The invention discloses a wheel axle processing device for transportation equipment with an automatic clamping and feeding structure, which includes a bed body, an auxiliary support mechanism, an automatic feeding mechanism and a grinding assembly. A spindle box is arranged on the left side of the bed body, and a three-jaw chuck is fixedly installed on the right side of the spindle box. A transverse driving slide is slidably installed on the right side of the bed body. The wheel axle processing device for transportation equipment with an automatic clamping and feeding structure is provided with an automatic feeding mechanism, a guiding cylinder and a guiding shaft. The driving motor pushes the upper clamping jaw and the lower clamping jaw through a bidirectional lead screw to grab the wheel axle on the material rack. Subsequently, the longitudinal driving slide pushes the wheel axle forward, and the third electric push rod pushes the wheel axle to move leftward. The tapered groove on the guiding cylinder cooperates with the tapered head on the guiding shaft to correct errors, so that the guiding shaft is inserted into the guiding cylinder, further correcting the deviation of the wheel axle, making the center line of the wheel axle coincide with the center line of the three-jaw chuck, which is convenient for the subsequent clamping of the three-jaw chuck.

Description

Technical Field

[0001] The present invention relates to the technical field of axle processing, and particularly to an axle processing device for transportation equipment with an automatic clamping and loading structure. Background Art

[0002] Axles are important component parts of transportation equipment. In order to obtain finished parts, they need to go through many processing procedures such as casting, turning, and precision grinding to form. Among them, precision grinding, as the last forming processing procedure, directly affects the performance of the finished axle.

[0003] Existing axle processing devices usually rely on manual loading. However, manual loading takes a long time, and it is difficult for manual operation to keep the axle coaxial with the three-jaw chuck, and repeated measurement and debugging are required, which greatly increases the production time and production cost. When the axle processing device is in processing, cutting fluid needs to be used, and splashing will inevitably occur when the cutting fluid is sprayed. Existing axle processing devices usually rely on an independent closed box to enclose the entire equipment, which restricts the splashing of the cutting fluid to a certain extent, but a large amount of cutting fluid still splashes on the equipment and is still difficult to completely clean after processing. In addition, when processing axles with a relatively long length, existing axle processing devices only rely on a single tailstock to support the axle, with few support points, and it is difficult to control the polarization of the axle during processing, resulting in poor use effects. In view of the above problems, it is necessary to improve the existing equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide an axle processing device for transportation equipment with an automatic clamping and loading structure, so as to solve the problems mentioned in the above background art that manual loading takes a long time, and it is difficult for manual operation to keep the axle coaxial with the three-jaw chuck, and repeated measurement and debugging are required, which greatly increases the production time and production cost, a large amount of cutting fluid splashes on the equipment and is still difficult to completely clean after processing, and existing axle processing devices only rely on a single tailstock to support the axle when processing axles with a relatively long length, with few support points, and it is difficult to control the polarization of the axle during processing, resulting in poor use effects.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An axle processing device for transportation equipment with an automatic clamping and loading structure, including a bed body, an auxiliary support mechanism, an automatic loading mechanism, and a grinding assembly. A spindle box is arranged on the left side of the bed body, and a three-jaw chuck is fixedly installed on the right side of the spindle box. A transverse active slide is slidably installed on the right side of the bed body, and an auxiliary support mechanism is fixedly installed on the top of the transverse active slide. A material rack is arranged behind the bed body, and an automatic loading mechanism is installed between the bed body and the material rack. The bottom of the automatic loading mechanism is connected to the bed body through a longitudinal active slide;

[0006] A guide cylinder is fixedly installed on the outside of the spindle box, and a tapered hole is provided at the right end of the guide cylinder. A guide shaft is fixedly installed on the left side of the automatic loading mechanism, and a tapered head is provided at the left end of the guide shaft. A grinding assembly is provided on the front side of the machine bed, and a grinding head assembly is installed at the rear end of the grinding assembly. A movable protection mechanism is fixedly installed on the outside of the grinding assembly, and the movable protection mechanism wraps around the outside of the grinding head assembly.

[0007] Preferably, the auxiliary support mechanism includes a tailstock, a first movable frame, a second movable frame, a first electric push rod, a through hole, a second electric push rod, and a support roller. The tailstock is fixedly installed on the transverse active slide, and a first movable frame is attached to the left side of the tailstock. At the same time, a second movable frame is attached to the left side of the first movable frame. A plurality of groups of first electric push rods are fixedly installed on the outside of the tailstock, and one group of first electric push rods is connected to the first movable frame. At the same time, another group of first electric push rods passes through the first movable frame and is connected to the second movable frame. Through holes are provided inside the tailstock, inside the first movable frame, and inside the second movable frame, and a second electric push rod is fixedly installed inside the through hole. At the same time, a support roller is fixedly installed on the second electric push rod;

[0008] By adopting the above technical solution, the two groups of first electric push rods push the corresponding first movable frame and the second movable frame, extending and adjusting the positions of the first movable frame and the second movable frame, facilitating the simultaneous support of the wheel shaft at multiple points.

[0009] Preferably, the center line of the three-jaw chuck coincides with the center line of the through hole, and the sliding track of the transverse active slide is parallel to the center line of the three-jaw chuck;

[0010] By adopting the above technical solution, the wheel shaft is fixed on the three-jaw chuck and the center line of the wheel shaft coincides with the center line of the three-jaw chuck, which also facilitates the wheel shaft to pass through the exact center of the through hole.

[0011] Preferably, the automatic loading mechanism includes a carriage, a bidirectional lead screw, a drive motor, an upper clamping jaw, a lower clamping jaw, and a third electric push rod. The carriage is slidably installed above the longitudinal active slide, and the right side of the carriage is connected to the slide by a third electric push rod. A bidirectional lead screw is rotatably installed at the rear of the carriage, and one end of the bidirectional lead screw is connected to the drive motor fixedly installed on the carriage. The upper clamping jaw and the lower clamping jaw are slidably installed at the rear of the carriage, and the upper clamping jaw is threadedly connected to the upper side of the bidirectional lead screw. At the same time, the lower clamping jaw is threadedly connected to the lower side of the bidirectional lead screw;

[0012] By adopting the above technical solution, the third motor drives the bidirectional lead screw to rotate, enabling the upper clamping jaw and the lower clamping jaw to cooperate to grasp the wheel shaft on the material rack. The longitudinal active slide can push the center of the wheel shaft on the carriage to coincide with the three-jaw chuck. The third electric push rod can push the carriage to move leftward, enabling the wheel shaft to be inserted into the three-jaw chuck and completing the clamping.

[0013] Preferably, the bidirectional lead screw, the driving motor, the upper clamping jaw and the lower clamping jaw cooperate to form a clamping assembly, and a plurality of clamping assemblies are uniformly arranged on the carriage;

[0014] By adopting the above technical solution, the clamping of different positions on the wheel axle by a plurality of clamping assemblies makes the clamping more stable.

[0015] Preferably, the moving directions of the upper clamping jaw and the lower clamping jaw on the bidirectional lead screw are opposite or the same, and the center lines of the upper clamping jaw and the lower clamping jaw are on the same horizontal plane as the center line of the three-jaw chuck and are parallel to each other;

[0016] By adopting the above technical solution, the center line of the wheel axle remains stable after being grasped by the upper clamping jaw and the lower clamping jaw, and the grasping position of the wheel axle is positioned, which is convenient for subsequent processing steps.

[0017] Preferably, three guiding cylinders are provided, and the three guiding cylinders are distributed in an annular array with the center line of the three-jaw chuck as the center, and the guiding shafts are arranged corresponding to the guiding cylinders;

[0018] By adopting the above technical solution, the tapered groove on the guiding cylinder cooperates with the tapered head on the guiding shaft, so that the guiding cylinder and the guiding shaft can correct the error and fit perfectly, which is convenient for the guiding shaft to be inserted into the guiding cylinder and correct the error of the longitudinal active sliding table.

[0019] Preferably, the movable protection mechanism includes an upper protective cover, a lower protective cover, a fourth electric push rod, an opening and a flexible brush. The front ends of the upper protective cover and the lower protective cover are slidably installed at the rear end of the grinding assembly, and a fourth electric push rod is fixedly installed at the rear side of the grinding assembly. The upper and lower ends of the fourth electric push rod are respectively connected with the upper protective cover and the lower protective cover. Openings are provided on both the left and right sides of the upper protective cover and the lower protective cover, and flexible brushes are fixedly installed inside the openings. The lower end of the upper protective cover is attached to the upper end of the lower protective cover;

[0020] By adopting the above technical solution, the fourth electric push rod pushes the upper protective cover and the lower protective cover to fit together. At this time, the wheel axle passes through the opening, and the flexible brush implanted on the inner wall of the opening blocks the gap, playing a role in completely closing the grinding head assembly.

[0021] Preferably, the center line of the opening coincides with the center line of the three-jaw chuck;

[0022] By adopting the above technical solution, the wheel axle is clamped on the three-jaw chuck, which is convenient for the wheel axle to pass through the center of the opening.

[0023] Compared with the prior art, the beneficial effect of the present invention is that the wheel axle processing device of the transportation equipment with an automatic clamping and feeding structure

[0024] (1) There is a tailstock, a first movable frame and a second movable frame. The first electric push rods of different groups push the corresponding first movable frame and the second movable frame to adjust the positions of the first movable frame and the second movable frame on the wheel axle. The second electric push rod pushes the supporting rollers close to the wheel axle, facilitating the support of multiple positions on the wheel axle by the supporting rollers on the first movable frame, the second movable frame and the tailstock, greatly reducing the polarization and resonance generated during the rotation of the wheel axle.

[0025] (2) There is an automatic feeding mechanism, a guide cylinder and a guide shaft. The driving motor pushes the upper jaw and the lower jaw through a bidirectional lead screw to grab the wheel axle on the rack. Subsequently, the longitudinal active slide pushes the wheel axle forward, and the third electric push rod pushes the wheel axle to move left. The tapered groove on the guide cylinder cooperates with the tapered head on the guide shaft to correct the error, enabling the guide shaft to be inserted into the guide cylinder, further correcting the deviation of the wheel axle, and making the center line of the wheel axle coincide with the center line of the three-jaw chuck, facilitating the subsequent clamping of the three-jaw chuck.

[0026] (3) There is a movable protection mechanism. The fourth electric push rod pushes the upper protective cover and the lower protective cover to fit together. At this time, the wheel axle passes through the opening, and the flexible brushes implanted on the inner wall of the opening fill the gap, enabling the upper protective cover, the lower protective cover and the flexible brushes to cooperate to form a closed space, completely wrapping the grinding head assembly, preventing the cutting fluid on the grinding component from splashing to the outside. The flexible brushes are made of soft material and are arranged in multiple layers. When the grinding head assembly moves horizontally along the wheel axle, the flexible brushes can be bent freely according to the shape of the wheel axle, greatly improving the scope of application and at the same time limiting the splashing range of the cutting fluid, facilitating subsequent cleaning and maintenance. Description of the Drawings

[0027] Figure 1 is the main view sectional structure schematic diagram of the present invention;

[0028] Figure 2 is the top view sectional structure schematic diagram of the present invention;

[0029] Figure 3 is the side view structure schematic diagram of the main spindle box of the present invention;

[0030] Figure 4 is the side view structure schematic diagram of the first movable frame of the present invention;

[0031] Figure 5 is the side view sectional structure schematic diagram of the carriage of the present invention;

[0032] Figure 6 is the side view sectional structure schematic diagram of the movable protection mechanism of the present invention;

[0033] Figure 7 is the present invention Figure 1 magnified structure schematic diagram at position A;

[0034] Figure 8This is a three-dimensional structure schematic diagram of the second movable frame of the present invention.

[0035] In the figure: 1, bed body; 2, main spindle box; 3, three-jaw chuck; 4, transverse driving slide; 5, auxiliary support mechanism; 51, tailstock; 52, first movable frame; 53, second movable frame; 54, first electric push rod; 55, through hole; 56, second electric push rod; 57, support roller; 6, material rack; 7, automatic loading mechanism; 71, carriage; 72, bidirectional lead screw; 73, driving motor; 74, upper clamping jaw; 75, lower clamping jaw; 76, third electric push rod; 8, longitudinal driving slide; 9, guide cylinder; 10, tapered hole; 11, guide shaft; 12, tapered head; 13, grinding assembly; 14, grinding head assembly; 15, movable protection mechanism; 151, upper protective cover; 152, lower protective cover; 153, fourth electric push rod; 154, opening; 155, flexible brush. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figure 1-8 , the present invention provides a technical solution: a transportation equipment wheel shaft processing device with an automatic clamping and loading structure, as Figure 1 and Figure 3 shown, a main spindle box 2 is arranged on the left side of the bed body 1, and a three-jaw chuck 3 is fixedly installed on the right side of the main spindle box 2.

[0038] In a further embodiment, the center line of the three-jaw chuck 3 coincides with the center line of the through hole 55, the sliding track of the transverse driving slide 4 is parallel to the center line of the three-jaw chuck 3, three second electric push rods 56 and corresponding support rollers 57 are arranged in one through hole 55, and the three second electric push rods 56 are arranged in an annular array with the through hole 55 as the center. The wheel shaft clamped on the three-jaw chuck 3 coincides with the center line of the through hole 55, facilitating the three corresponding support rollers 57 to support the outer side of the wheel shaft simultaneously.

[0039] As Figure 1 , Figure 2 , Figure 4 and Figure 8 shown, a transverse driving slide 4 is slidably installed on the right side of the bed body 1, and an auxiliary support mechanism 5 is fixedly installed on the top of the transverse driving slide 4.

[0040] In a further embodiment, the auxiliary support mechanism 5 includes a tailstock 51, a first movable frame 52, a second movable frame 53, a first electric push rod 54, a through hole 55, a second electric push rod 56 and a support roller 57. The tailstock 51 is fixedly installed on the transverse active slide 4, and the first movable frame 52 is attached to the left side of the tailstock 51. At the same time, the second movable frame 53 is attached to the left side of the first movable frame 52. A plurality of groups of first electric push rods 54 are fixedly installed on the outside of the tailstock 51, and one group of first electric push rods 54 is connected to the first movable frame 52. At the same time, the other group of first electric push rods 54 passes through the first movable frame 52 and is connected to the second movable frame 53. Through holes 55 are opened inside the tailstock 51, inside the first movable frame 52 and inside the second movable frame 53, and a second electric push rod 56 is fixedly installed inside the through hole 55. At the same time, a support roller 57 is fixedly installed on the second electric push rod 56. The transverse active slide 4 pushes the tailstock 51 to move horizontally. At the same time, the first electric push rod 54 pushes the corresponding first movable frame 52 and the second movable frame 53 to move, dispersing the positions of the tailstock 51, the first movable frame 52 and the second movable frame 53. Subsequently, the support rollers 57 on the tailstock 51, the first movable frame 52 and the second movable frame 53 respectively support different positions of the wheel axle, greatly improving the support stability of the wheel axle.

[0041] As Figure 1 , Figure 2 and Figure 5 shown, a material rack 6 is arranged behind the bed body 1, and an automatic feeding mechanism 7 is installed between the bed body 1 and the material rack 6. The bottom of the automatic feeding mechanism 7 is connected to the bed body 1 through a longitudinal active slide 8.

[0042] In a further embodiment, the automatic feeding mechanism 7 includes a slide frame 71, a bidirectional lead screw 72, a drive motor 73, an upper clamping jaw 74, a lower clamping jaw 75 and a third electric push rod 76. The slide frame 71 is slidably installed above the longitudinal active slide 8, and the right side of the slide frame 71 is connected to the slide through the third electric push rod 76. The bidirectional lead screw 72 is rotatably installed at the rear of the slide frame 71, and one end of the bidirectional lead screw 72 is connected to the drive motor 73 fixedly installed on the slide frame 71. The upper clamping jaw 74 and the lower clamping jaw 75 are slidably installed at the rear of the slide frame 71, and the upper clamping jaw 74 is threadedly connected to the upper side of the bidirectional lead screw 72. At the same time, the lower clamping jaw 75 is threadedly connected to the lower side of the bidirectional lead screw 72. The drive motor 73 drives the bidirectional lead screw 72 to rotate, and the bidirectional lead screw 72 pushes the upper clamping jaw 74 and the lower clamping jaw 75 to cooperate to grab the wheel axle on the material rack 5.

[0043] As Figure 5 shown, the bidirectional lead screw 72, the drive motor 73, the upper clamping jaw 74 and the lower clamping jaw 75 cooperate to form a clamping assembly. A plurality of clamping assemblies are evenly arranged on the slide frame 71. The plurality of clamping assemblies cooperate to grab different positions of the wheel axle, dispersing the force on the wheel axle and making the wheel axle grabbing more stable.

[0044] In a further embodiment, the upper jaw 74 and the lower jaw 75 move in opposite or the same directions on the bidirectional lead screw 72, and the center lines of the upper jaw 74 and the lower jaw 75 and the center line of the three-jaw chuck 3 are on the same horizontal plane and parallel to each other. The bidirectional lead screw 72 defines the moving positions of the upper jaw 74 and the lower jaw 75, so that the cooperation of the upper jaw 74 and the lower jaw 75 to grip the rear axle position remains constant.

[0045] As Figure 3 and Figure 7 shown, a guide cylinder 9 is fixedly installed on the outside of the headstock 2, and a tapered hole 10 is provided at the right end of the guide cylinder 9.

[0046] In a further embodiment, there are three guide cylinders 9, and the three guide cylinders 9 are arranged in an annular array with the center line of the three-jaw chuck 3 as the center. The guide shafts 11 are correspondingly arranged with the guide cylinders 9. The cooperation of the guide cylinders 9 and the guide shafts 11 restricts the lateral movement path of the carriage 71 and corrects the error generated by the movement of the longitudinal active slide 8, facilitating the alignment of the center of the wheel axle grasped by the automatic loading mechanism 7 with the center of the three-jaw chuck 3.

[0047] As Figure 2 and Figure 6 shown, a guide shaft 11 is fixedly installed on the left side of the automatic loading mechanism 7, and a tapered head 12 is provided at the left end of the guide shaft 11. A grinding assembly 13 is provided on the front side of the bed 1, and a grinding head assembly 14 is installed at the rear end of the grinding assembly 13. A movable protection mechanism 15 is fixedly installed on the outside of the grinding assembly 13, and the movable protection mechanism 15 wraps around the outside of the grinding head assembly 14.

[0048] In a further embodiment, the movable protection mechanism 15 includes an upper protective cover 151, a lower protective cover 152, a fourth electric push rod 153, an opening 154 and a flexible brush 155. The front ends of the upper protective cover 151 and the lower protective cover 152 are slidably installed at the rear end of the grinding assembly 13, and a fourth electric push rod 153 is fixedly installed at the rear side of the grinding assembly 13. The upper and lower ends of the fourth electric push rod 153 are respectively connected to the upper protective cover 151 and the lower protective cover 152. Openings 154 are provided on both the left and right sides of the upper protective cover 151 and the lower protective cover 152, and flexible brushes 155 are fixedly installed inside the openings 154. The lower end of the upper protective cover 151 is in contact with the upper end of the lower protective cover 152. After the fourth electric push rod 153 pushes the upper protective cover 151 and the lower protective cover 152 to fit together, the grinding head assembly 14 can be closed. At the same time, the flexible brushes 155 further fill the gap between the opening 154 and the wheel axle, avoiding the problem of the cutting chips splashing out during the grinding process of the grinding assembly 13. At the same time, the multiple layers of soft flexible brushes 155 will bend and deform when being squeezed by the wheel axle, facilitating the flexible brushes 155 to fill the gap in real time according to the actual shape of the wheel axle during the movement of the grinding assembly 13.

[0049] As shown Figure 2 in the figure, the center line of the opening 154 coincides with the center line of the three-jaw chuck 3, facilitating the wheel axle held by the three-jaw chuck 3 to pass through the opening 154.

[0050] During use, the wheel axles are sequentially placed on the material rack 6. The longitudinal active slide 8 moves backward, and the drive motor 73 is started. The drive motor 73 drives the upper jaw 74 and the lower jaw 75 to grip the wheel axle through the bidirectional lead screw 72. The multiple sets of upper jaws 74 and lower jaws 75 make the gripping of the wheel axle more stable. Subsequently, the longitudinal active slide 8 moves forward, aligning the center of the wheel axle with the three-jaw chuck 3. The third electric push rod 76 pushes the carriage 71 to move leftward. At this time, the tapered hole 10 on the guide cylinder 9 cooperates with the tapered head 12 on the guide shaft 11 to correct the deviation until the guide shaft 11 is inserted into the inside of the guide cylinder 9, facilitating the quick and accurate positioning of the wheel axle. The three-jaw chuck 3 clamps the wheel axle. The transverse active slide 4 pushes the tailstock 51 to move leftward until the wheel axle is sleeved into the through hole 55. The first electric push rod 54 pushes the corresponding first movable frame 52 and the second movable frame 53 to adjust the positions of the tailstock 51, the first movable frame 52, and the second movable frame 53. The second electric push rod 56 pushes the support roller 57 to be close to the wheel axle, supporting the wheel axle at different points simultaneously, reducing the polarization and resonance generated during the rotation of the wheel axle. The fourth electric push rod 153 drives the upper protective cover 151 and the lower protective cover 152 to fit together and enclose the grinding head assembly 14. At this time, the wheel axle passes through the opening 154. The main spindle box 2 is started, and the main spindle box 2 drives the three-jaw chuck 3 and the wheel axle to rotate. The grinding assembly 13 drives the grinding head assembly 14 to grind the wheel axle. Meanwhile, the cutting fluid splashing during the grinding process is blocked by the upper protective cover 151 and the lower protective cover 152. The gap between the opening 154 and the wheel axle is filled by the multi-layer flexible brushes 155 implanted on the inner wall of the opening 154. When the grinding assembly 13 moves horizontally along the wheel axle, the flexible brushes 155 bend freely according to the shape change of the wheel axle, making the flexible brushes 155 always enclose the upper protective cover 151 and the lower protective cover 152, greatly limiting the range of splashing of the cutting fluid and grinding debris, facilitating subsequent cleaning and maintenance, and thus completing all the processing.

[0051] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0052] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the protected content of the present invention.

[0053] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A transportation equipment wheel axle processing device with an automatic clamping and feeding structure, comprising a bed (1), an auxiliary support mechanism (5), an automatic feeding mechanism (7) and a grinding assembly (13), characterized in that: A spindle box (2) is arranged on the left side of the bed (1), and a three-jaw chuck (3) is fixedly installed on the right side of the spindle box (2); a transverse active slide (4) is slidably installed on the right side of the bed (1), and an auxiliary support mechanism (5) is fixedly installed on the top of the transverse active slide (4); a material rack (6) is arranged at the rear of the bed (1), and an automatic feeding mechanism (7) is installed between the bed (1) and the material rack (6); the bottom of the automatic feeding mechanism (7) is connected to the bed (1) via a longitudinal active slide (8); A guide cylinder (9) is fixedly mounted on the outer side of the spindle box (2), and a tapered hole (10) is formed at the right end of the guide cylinder (9); a guide shaft (11) is fixedly mounted on the left side of the automatic feeding mechanism (7), and a tapered head (12) is provided at the left end of the guide shaft (11); a grinding assembly (13) is provided on the front side of the bed (1), and a grinding head assembly (14) is installed at the rear end of the grinding assembly (13); a movable protective mechanism (15) is fixedly mounted on the outer side of the grinding assembly (13), and the movable protective mechanism (15) is wrapped around the outer side of the grinding head assembly (14); The auxiliary support mechanism (5) comprises a tailstock (51), a first movable frame (52), a second movable frame (53), a first electric push rod (54), a through hole (55), a second electric push rod (56) and a supporting roller (57); the tailstock (51) is fixedly mounted on the transverse active slide (4); the first movable frame (52) is fitted on the left side of the tailstock (51); and the second movable frame (53) is fitted on the left side of the first movable frame (52); and a plurality of first movable frames (54) are fixedly mounted on the outer side of the tailstock (51). An electric push rod (54), wherein a group of first electric push rods (54) are connected to the first movable frame (52), and another group of first electric push rods (54) penetrate the first movable frame (52) and are connected to the second movable frame (53); through holes (55) are provided inside the tailstock (51), inside the first movable frame (52), and inside the second movable frame (53); and second electric push rods (56) are fixedly installed inside the through holes (55); and support rollers (57) are fixedly installed on the second electric push rods (56); The automatic feeding mechanism (7) comprises a slide (71), a bidirectional screw rod (72), a driving motor (73), an upper clamping jaw (74), a lower clamping jaw (75) and a third electric push rod (76); the slide (71) is slidably mounted above the longitudinal active slide (8), and the right side of the slide (71) is connected to the slide via the third electric push rod (76); a bidirectional screw rod (72) is rotatably mounted on the rear side of the slide (71), and one end of the bidirectional screw rod (72) is connected to the driving motor (73) fixedly mounted on the slide (71); an upper clamping jaw (74) and a lower clamping jaw (75) are slidably mounted on the rear side of the slide (71), and the upper clamping jaw (74) is threadedly connected to the upper side of the bidirectional screw rod (72), and the lower clamping jaw (75) is threadedly connected to the lower side of the bidirectional screw rod (72).

2. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The center line of the three-jaw chuck (3) coincides with the center line of the through hole (55), and the sliding track of the transverse active slide table (4) is parallel to the center line of the three-jaw chuck (3).

3. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The bidirectional screw rod (72), the drive motor (73), the upper clamping jaw (74) and the lower clamping jaw (75) cooperate to form a clamping assembly, and a plurality of clamping assemblies are evenly arranged on the slide (71).

4. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The upper clamping jaw (74) and the lower clamping jaw (75) move in opposite directions on the bidirectional screw rod (72), and the center lines of the upper clamping jaw (74) and the lower clamping jaw (75) are located on the same horizontal plane as the center line of the three-jaw chuck (3) and are parallel to each other.

5. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: Three guide cylinders (9) are provided, and the three guide cylinders (9) are distributed in a ring array with the center line of the three-jaw chuck (3) as the center, and the guide shaft (11) is provided corresponding to the guide cylinder (9).

6. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The movable protective mechanism (15) comprises an upper protective cover (151), a lower protective cover (152), a fourth electric push rod (153), an opening (154) and a flexible brush (155); the front ends of the upper protective cover (151) and the lower protective cover (152) are both slidably mounted on the rear end of the grinding assembly (13); the rear side of the grinding assembly (13) is fixedly mounted with the fourth electric push rod (153); the upper and lower ends of the fourth electric push rod (153) are respectively connected to the upper protective cover (151) and the lower protective cover (152); the left and right sides of the upper protective cover (151) and the lower protective cover (152) are both provided with openings (154); the inside of the opening (154) is fixedly mounted with a flexible brush (155); the lower end of the upper protective cover (151) is fitted with the upper end of the lower protective cover (152).

7. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 6 is characterized in that: The center line of the opening (154) coincides with the center line of the three-jaw chuck (3).

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