Transportation equipment axle machining device with automatic clamping and feeding structure

Abstract

The transportation equipment axle machining device with the automatic clamping and feeding structure comprises a lathe bed, an auxiliary supporting mechanism, an automatic feeding mechanism and a grinding assembly, a spindle box is arranged on the left side of the lathe bed, a three-jaw chuck is fixedly installed on the right side of the spindle box, and a transverse driving sliding table is installed on the right side of the lathe bed in a sliding mode. According to the transportation equipment axle machining device with the automatic clamping and feeding structure, the automatic feeding mechanism, a guide cylinder and a guide shaft are arranged, a driving motor pushes an upper clamping jaw and a lower clamping jaw through a two-way lead screw so that the upper clamping jaw and the lower clamping jaw can grab an axle on a material frame, then a longitudinal driving sliding table pushes the axle to move forwards, a third electric push rod pushes the axle to move leftwards, and the axle on the material frame is clamped. The conical groove in the guide cylinder is matched with the conical head on the guide shaft to correct errors, so that the guide shaft is inserted into the guide cylinder, the deviation of the wheel shaft is further corrected, the center line of the wheel shaft coincides with the center line of the three-jaw clamping piece, and follow-up clamping of the three-jaw chuck is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of wheel axle processing, and in particular to a wheel axle processing device for transportation equipment with an automatic clamping and feeding structure. Background Art

[0002] The axle is an important component of transportation equipment. In order to obtain finished parts, it needs to go through many processing steps such as casting, turning, and fine grinding. Among them, fine grinding, as the last forming processing step, directly affects the performance of the finished axle.

[0003] Existing wheel axle processing devices usually rely on manual loading, but manual loading takes a long time, and it is difficult to keep the wheel axle and the three-jaw chuck coaxial during manual operation, and repeated measurement and debugging are required, which greatly increases production time and production costs. The wheel axle processing device needs to use cutting fluid during processing, and splashing is inevitable when the cutting fluid is sprayed. Existing wheel axle processing devices usually rely on an independent closed box to enclose the entire device, which limits the splashing of the cutting fluid to a certain extent, but a large amount of cutting fluid is still splashed on the equipment, and it is still difficult to completely clean up after the processing is completed. In addition, the existing wheel axle processing device only relies on a tailstock to support the wheel axle when processing a longer wheel axle. It has few support points and is difficult to control the polarization of the wheel axle during processing, and the use effect is not good. In view of the above problems, it is necessary to improve the existing equipment. Summary of the invention

[0004] The object of the present invention is to provide a wheel axle processing device for transportation equipment with an automatic clamping and feeding structure, so as to solve the problems proposed in the above-mentioned background technology that manual feeding takes a long time, it is difficult to keep the wheel axle and the three-jaw chuck coaxially by manual operation, 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, which is still difficult to completely clean up after the processing is completed. In addition, the existing wheel axle processing device only relies on one tailstock to support the wheel axle when processing a longer wheel axle. It has few support points, and it is difficult to control the polarization of the wheel axle during processing, resulting in poor use effect.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transportation equipment wheel axle processing device with an automatic clamping and feeding structure, comprising a bed, an auxiliary support mechanism, an automatic feeding mechanism and a grinding assembly, a spindle box is arranged on the left side of the bed, 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, and an auxiliary support mechanism is fixedly installed on the top of the transverse active slide, a material rack is arranged behind the bed, and an automatic feeding mechanism is installed between the bed and the material rack, and the bottom of the automatic feeding mechanism is connected to the bed through a longitudinal active slide;

[0006] A guide cylinder is fixedly installed on the outside of the spindle box, and a tapered hole is opened at the right end of the guide cylinder, a guide shaft is fixedly installed on the left side of the automatic feeding 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 bed, and a grinding head assembly is installed at the rear end of the grinding assembly, a movable protective mechanism is fixedly installed on the outside of the grinding assembly, and the movable protective mechanism is wrapped 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 supporting roller, the tailstock is fixedly mounted on the transverse active slide, and the first movable frame is fitted on the left side of the tailstock, and the second movable frame is fitted on the left side of the first movable frame, multiple groups of first electric push rods are fixedly mounted on the outside of the tailstock, and one group of first electric push rods is connected to the first movable frame, and another group of first electric push rods penetrates the first movable frame and is connected to the second movable frame, through holes are opened inside the tailstock, inside the first movable frame and inside the second movable frame, and the second electric push rod is fixedly mounted inside the through hole, and the supporting roller is fixedly mounted 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 second movable frame, extend and adjust the positions of the first movable frame and the second movable frame, so as to support the wheel axle at multiple points at the same time.

[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 axle is fixed on the three-jaw chuck and the center line of the wheel axle and the three-jaw chuck coincides, which also facilitates the wheel axle to pass through the center of the through hole.

[0011] Preferably, the automatic feeding mechanism comprises a slide, a bidirectional screw, a driving motor, an upper clamping jaw, a lower clamping jaw and a third electric push rod, the slide is slidably mounted above the longitudinal active slide, and the right side of the slide is connected to the slide through the third electric push rod, a bidirectional screw is rotatably mounted on the rear side of the slide, and one end of the bidirectional screw is connected to the driving motor fixedly mounted on the slide, an upper clamping jaw and a lower clamping jaw are slidably mounted on the rear side of the slide, and the upper clamping jaw is threadedly connected to the upper side of the bidirectional screw, and the lower clamping jaw is threadedly connected to the lower side of the bidirectional screw;

[0012] By adopting the above technical solution, the third motor drives the bidirectional screw to rotate, so that the upper jaw and the lower jaw cooperate to grasp the axle on the material rack, the longitudinal active slide can push the center of the axle on the slide to coincide with the three-jaw chuck, and the third electric push rod can push the slide to the left, so that the axle is inserted into the three-jaw chuck and completes the clamping.

[0013] Preferably, the bidirectional screw rod, the drive motor, the upper clamping jaw and the lower clamping jaw cooperate to form a clamping assembly, and a plurality of clamping assemblies are evenly arranged on the slide;

[0014] By adopting the above technical solution, multiple clamping assemblies clamp different points on the axle, making the clamping more stable.

[0015] Preferably, the upper jaw and the lower jaw move in opposite directions on the bidirectional screw, and the center lines of the upper jaw and the lower jaw and the center line of the three-jaw chuck are located on the same horizontal plane and are parallel to each other;

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

[0017] Preferably, three guide cylinders are provided, and the three guide cylinders are distributed in a circular array with the center line of the three-jaw chuck as the center, and the guide shafts are provided correspondingly to the guide cylinders;

[0018] By adopting the above technical solution, the conical groove on the guide cylinder cooperates with the conical head on the guide shaft, so that the guide cylinder and the guide shaft can be completely matched to correct the error, which makes it easy for the guide shaft to be inserted into the guide cylinder and correct the error of the longitudinal active slide.

[0019] Preferably, the movable protective mechanism comprises 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 both slidably mounted on the rear end of the grinding assembly, and the rear side of the grinding assembly is fixedly mounted with a fourth electric push rod, the upper and lower ends of the fourth electric push rod are respectively connected to the upper protective cover and the lower protective cover, the left and right sides of the upper protective cover and the lower protective cover are both opened, and a flexible brush is fixedly mounted inside the opening, and the lower end of the upper protective cover is fitted with 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 to fit the lower protective cover. 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, thereby 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 axle is clamped on the three-jaw chuck, which makes it easy for the axle to pass through the center of the opening.

[0023] Compared with the prior art, the invention has the following beneficial effects: the transportation equipment axle processing device with automatic clamping and feeding structure,

[0024] (1) A tailstock, a first movable frame and a second movable frame are provided, and first electric push rods of different groups push the corresponding first movable frame and second movable frame to adjust the positions of the first movable frame and the second movable frame on the wheel axle, and the second electric push rod pushes the supporting roller to be close to the wheel axle, so that multiple positioning on the wheel axle can be supported by the first movable frame, the second movable frame and the supporting roller on the tailstock, thereby greatly reducing the polarization and resonance generated by the wheel axle during rotation;

[0025] (2) An automatic feeding mechanism, a guide cylinder and a guide shaft are provided. The driving motor pushes the upper clamp and the lower clamp through a bidirectional screw rod to make them grab the wheel axle on the material rack. Then the longitudinal active slide pushes the wheel axle forward, and the third electric push rod pushes the wheel axle to the left. The conical groove on the guide cylinder cooperates with the conical head on the guide shaft to correct the error, so that the guide shaft is inserted into the guide cylinder, and the deviation of the wheel axle is further corrected so that the center line of the wheel axle coincides with the center line of the three-jaw chuck, which is convenient for the subsequent clamping of the three-jaw chuck;

[0026] (3) A movable protective mechanism is provided. The fourth electric push rod pushes the upper protective cover to fit the lower protective cover. At this time, the wheel axle passes through the opening. The flexible brush implanted on the inner wall of the opening fills the gap, so that the upper protective cover, the lower protective cover and the flexible brush cooperate to form a closed space, which completely wraps the grinding head assembly to prevent the cutting fluid on the grinding assembly from splashing to the outside. The flexible brush is soft and has multiple layers. When the grinding head assembly moves laterally along the wheel axle, the flexible brush can be freely bent according to the shape of the wheel axle, which greatly improves the scope of application and limits the splash range of the cutting fluid, which is convenient for subsequent cleaning and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the main cross-sectional structure of the present invention;

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

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

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

[0031] Figure 5 It is a schematic diagram of the side cross-sectional structure of the slide of the present invention;

[0032] Figure 6 It is a schematic diagram of the side cross-sectional structure of the movable protection mechanism of the present invention;

[0033] Figure 7 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

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

[0035] In the figure: 1. bed; 2. spindle box; 3. three-jaw chuck; 4. transverse active 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 feeding mechanism; 71. slide; 72. two-way screw rod; 73. drive motor; 74. upper clamping jaw; 75. lower clamping jaw; 76. third electric push rod; 8. longitudinal active slide; 9. guide cylinder; 10. tapered hole; 11. guide shaft; 12. cone head; 13. grinding component; 14. grinding head assembly; 15. movable protective mechanism; 151. upper protective cover; 152. lower protective cover; 153. fourth electric push rod; 154. opening; 155. flexible brush. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-8 The present invention provides a technical solution: a transportation equipment axle processing device with an automatic clamping and feeding structure, such as Figure 1 and Figure 3 As shown, 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.

[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 trajectory of the transverse active 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 a through hole 55, and the three second electric push rods 56 are arranged in a circular array with the through hole 55 as the center, and the wheel axle clamped on the three-jaw chuck 3 coincides with the center line of the through hole 55, so that the three corresponding support rollers 57 can simultaneously support the outer side of the wheel axle.

[0039] like Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, 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.

[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 supporting roller 57. The tailstock 51 is fixedly mounted on the transverse active slide 4, and 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. Multiple groups of first electric push rods 54 are fixedly mounted on the outer side of the tailstock 51, and one group of first electric push rods 54 is connected to the first movable frame 52, and another group of first electric push rods 54 penetrates the first movable frame 52 and is connected to the second movable frame 53. A through hole 55 is provided inside 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, and a supporting roller 57 is fixedly installed on the second electric push rod 56. The transverse active slide 4 pushes the tailstock 51 to move transversely, and at the same time, the first electric push rod 54 pushes the corresponding first movable frame 52 and second movable frame 53 to move, thereby dispersing the positions of the tailstock 51, the first movable frame 52 and the second movable frame 53. Subsequently, the supporting 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, thereby greatly improving the supporting stability of the wheel axle.

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

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

[0043] like Figure 5 As shown, 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. A plurality of clamping assemblies are evenly arranged on the slide 71. The plurality of clamping assemblies cooperate to grasp different positions of the wheel axle, thereby dispersing the force on the wheel axle and making the wheel axle grasping more stable.

[0044] In a further embodiment, the movement directions of the upper jaw 74 and the lower jaw 75 on the bidirectional screw 72 are opposite or opposite, and the center lines of the upper jaw 74 and the lower 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. The bidirectional screw 72 limits the moving position of the upper jaw 74 and the lower jaw 75, so that the position of the rear wheel axle remains constant after the upper jaw 74 and the lower jaw 75 cooperate to grasp.

[0045] like Figure 3 and Figure 7 As shown, a guide cylinder 9 is fixedly installed on the outer side of the spindle box 2, and a tapered hole 10 is opened at the right end of the guide cylinder 9.

[0046] In a further embodiment, three guide cylinders 9 are provided, and the three guide cylinders 9 are distributed in a circular 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. The guide cylinder 9 and the guide shaft 11 cooperate to limit the lateral movement path of the slide 71, and correct the error caused by the longitudinal movement of the active slide 8, so as to facilitate the alignment of the center of the wheel axle grasped by the automatic feeding mechanism 7 with the center of the three-jaw chuck 3.

[0047] like Figure 2 and Figure 6 As shown, a guide shaft 11 is fixedly installed on the left side of the automatic feeding mechanism 7, and a cone head 12 is provided at the left end of the guide shaft 11, a grinding component 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 component 13, and a movable protective mechanism 15 is fixedly installed on the outer side of the grinding component 13, and the movable protective mechanism 15 is wrapped around the outer side of the grinding head assembly 14.

[0048] In a further embodiment, the movable protective 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 mounted on the rear end of the grinding assembly 13, and the fourth electric push rod 153 is fixedly mounted on 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. The upper and lower sides of the lower protective cover 151 and the lower protective cover 152 are both provided with openings 154, and the openings 154 are fixedly mounted inside There is a flexible brush 155, and the lower end of the upper protective cover 151 is fitted with the upper end of the lower protective cover 152. The fourth electric push rod 153 pushes the upper protective cover 151 and the lower protective cover 152 to fit together to close the grinding head assembly 14. At the same time, the flexible brush 155 further fills the gap between the opening 154 and the axle, avoiding the problem of splashing cutting during the grinding process of the grinding component 13. At the same time, the multi-layer soft flexible brush 155 will bend and deform when squeezed by the axle, so that the flexible brush 155 can fill the gap in real time according to the actual shape of the axle during the movement of the grinding component 13.

[0049] like Figure 2 As shown, the center line of the opening 154 coincides with the center line of the three-jaw chuck 3 , so that the wheel axle clamped on the three-jaw chuck 3 can pass through the opening 154 .

[0050] When in use, the wheel axle is placed on the material rack 6 in sequence, the longitudinal active slide 8 moves backward, and the drive motor 73 is started. The drive motor 73 drives the upper clamping jaw 74 and the lower clamping jaw 75 to grab the wheel axle through the bidirectional screw rod 72. The multiple sets of upper clamping jaws 74 and lower clamping jaws 75 make the wheel axle grabbing more stable. Then the longitudinal active slide 8 moves forward so that the center of the wheel axle coincides with the three-jaw chuck 3. The third electric push rod 76 pushes the slide 71 to move left. At this time, the tapered hole 10 on the guide cylinder 9 and the tapered head 12 on the guide shaft 11 cooperate to correct the deviation until the guide shaft 11 is inserted into the guide cylinder 9, so as to quickly and accurately complete the positioning of the wheel axle. The three-jaw chuck 3 clamps the wheel axle, and the transverse active slide 4 pushes the tailstock 51 to move left until the wheel axle is inserted 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 supporting roller 57 The fourth electric push rod 153 drives the upper protective cover 151 and the lower protective cover 152 to fit and close the grinding head assembly 14. At this time, the wheel axle passes through the opening 154, and the spindle box 2 is started. The spindle box 2 drives the three-jaw chuck 3 to rotate the wheel axle, and the grinding assembly 13 drives the grinding head assembly 14 to grind the wheel axle. At the same time, the cutting fluid splashed 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 with a multi-layer flexible brush 155 implanted on the inner wall of the opening 154. When the grinding assembly 13 moves laterally along the wheel axle, the flexible brush 155 bends freely according to the shape change of the wheel axle, so that the flexible brush 155 always closes the upper protective cover 151 and the lower protective cover 152, which greatly limits the range of splashing of cutting fluid and grinding chips, and is convenient for subsequent cleaning and maintenance.

[0051] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0052] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the protection content of the present invention.

[0053] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 opened 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 arranged at the left end of the guide shaft (11); a grinding assembly (13) is arranged 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).

2. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: 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 table (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), and 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 supporting rollers (57) are fixedly installed on the second electric push rods (56).

3. 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).

4. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: 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).

5. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 4 is characterized in that: The bidirectional screw rod (72), the driving 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).

6. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 4 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.

7. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The guide cylinders (9) are provided in three numbers, and the three guide cylinders (9) are distributed in a circular 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).

8. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 1 is characterized in that: The movable protection mechanism (15) comprises an upper protection cover (151), a lower protection cover (152), a fourth electric push rod (153), an opening (154) and a flexible brush (155); the front ends of the upper protection cover (151) and the lower protection 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 protection cover (151) and the lower protection cover (152); the left and right sides of the upper protection cover (151) and the lower protection 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 protection cover (151) is fitted with the upper end of the lower protection cover (152).

9. The transportation equipment axle processing device with an automatic clamping and feeding structure according to claim 8, 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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