An automatic loading and unloading device for a centerless grinder used for cross shaft processing

Abstract

The present invention discloses an automatic loading and unloading device for a centerless grinder for processing a cross shaft, comprising: a machine base, a control box is installed at the front position of the right side of the machine base, and a grinding wheel group is installed above the machine base; pillars are installed on the left and right sides of the rear of the grinding wheel group, a loading mechanism is installed above the pillar on the right side, and a unloading mechanism is installed above the pillar on the left side; the loading mechanism also includes: a correction track, a lifting cylinder 2, a back plate, an auxiliary plate, a clamping claw mounting plate and a clamping claw, a correction track is installed on the right side above the auxiliary plate, a lifting cylinder 2 is installed on the left side of the correction track, the output end of the lifting cylinder 2 is connected to the clamping claw mounting plate, and a clamping claw is installed below the clamping claw mounting plate. The present invention uses a loading mechanism and an unloading mechanism to replace the existing manual loading and unloading and processing surface conversion operations, which can not only save a lot of labor, but also reduce the safety hazards of the staff during the operation.

Description

Technical Field

[0001] The invention relates to the technical field of cross shaft processing, in particular to an automatic loading and unloading device of a centerless grinder for processing a cross shaft. Background Art

[0002] The cross shaft, also known as the cross bit, is a universal joint. It is a mechanical part that realizes variable-angle power transmission. It is used in positions where the direction of the transmission axis needs to be changed. It is the "joint" component of the universal transmission device of the automobile drive system. The cross shaft needs to be polished on four legs by a centerless grinder during the production process. Currently, in the production process, since the centerless grinder can only grind two legs of the cross shaft at a time, it is necessary to manually place the cross shaft in the processing position of the centerless grinder, and then manually take it out and change the position for grinding. In addition, the grinding wheel of the centerless grinder is always in a rotating state during the entire processing process, which not only has a great safety hazard, but also has the problems of high labor intensity and low production efficiency in the entire operation process. For this reason, we propose a more practical automatic loading and unloading device for centerless grinders for cross shaft processing. Summary of the invention

[0003] The purpose of the present invention is to provide an automatic loading and unloading device for a centerless grinder for processing a cross shaft, which solves the problem that in the current production process, since the centerless grinder can only grind the two legs of the cross shaft at a time, it is necessary to manually place the cross shaft in the processing position of the centerless grinder, and then manually take it out and change the position for grinding again. In addition, the grinding wheel of the centerless grinder is always in a rotating state during the entire processing process, which not only has a large safety hazard, but also the entire operation process has the problems of high labor intensity and low production efficiency.

[0004] To achieve the above object, the present invention provides the following technical solution: an automatic loading and unloading device for a centerless grinder for cross shaft processing, comprising:

[0005] A machine base, a control box is installed at the front position of the right side of the machine base, a grinding wheel group is installed above the machine base, and a workbench is installed at the middle position inside the grinding wheel group;

[0006] A leveling frame is arranged on the left side of the workbench, a rotating frame is installed below the leveling frame, and a leveling sensor is installed on the rear side of the leveling frame;

[0007] A material unloading rack is installed at the left rear of the machine base, and a material loading rack is installed at the right rear of the machine base. The structure of the material unloading rack is the same as that of the material loading rack. A mounting frame is installed below the material unloading rack and the material loading rack, and the mounting frame is fixed to the machine base;

[0008] Pillars are installed on the left and right sides of the rear of the grinding wheel group, a loading mechanism is installed above the right pillar, and a unloading mechanism is installed above the left pillar, and the loading mechanism has the same structure as the unloading mechanism;

[0009] The feeding mechanism also includes: a correction track, a lifting cylinder 2, a back plate, an auxiliary plate, a clamping claw mounting plate and a clamping claw, the correction track is installed on the upper right side of the auxiliary plate, the back plate is installed on the rear side of the correction track, the lifting cylinder 2 is installed on the left side of the correction track, the output end of the lifting cylinder 2 is connected to the clamping claw mounting plate, and the clamping claw is installed below the clamping claw mounting plate;

[0010] A translation track is installed on the rear side of the loading mechanism and the unloading mechanism, a rack 2 is fixed on the upper surface of the translation track, and a drag chain is installed on the rear side of the translation track;

[0011] A backing claw is installed at the front end of the loading rack, an adjusting block is installed at the lower end of the backing claw, and a travel switch is installed on the outer side of the adjusting block.

[0012] Preferably, the leveling frame also includes:

[0013] Leveling wheels, two groups of which are symmetrically mounted on the left and right ends of the upper side of the leveling frame, and the number of leveling wheels in each group is set to two;

[0014] A driving wheel, which is installed below the leveling wheel on the right side and meshes with the leveling wheel;

[0015] A leveling motor is connected to the outer side of the driving wheel and forms a rotating structure with the driving wheel.

[0016] Preferably, the rotary frame also includes:

[0017] A lifting cylinder 1, which is installed inside the rotating frame;

[0018] A top frame connected to the upper output end of the lifting cylinder 1;

[0019] The angle rotating platform is installed at the bottom of the rotating frame and forms a rotating structure with the rotating frame.

[0020] Preferably, the unloading rack further comprises:

[0021] A chain installed inside the unloading rack;

[0022] A sprocket, meshingly connected to the front and rear ends of the chain;

[0023] A rotating shaft, which is installed between the two sprockets at the rear side;

[0024] A reduction motor is connected to the outer side of the rotating shaft and forms a rotating structure with the rotating shaft.

[0025] Preferably, the correction track also includes:

[0026] Rack 1, which is installed on the right side of the correction track;

[0027] A waterproof distribution box is installed above the correction track.

[0028] Preferably, the back plate further comprises:

[0029] A driver 1 is installed on the rear right side of the back panel;

[0030] A second driver is installed on the left side of the rear of the back plate, and the structure of the second driver is the same as that of the first driver;

[0031] An electromagnetic reversing valve, which is installed above the second driver;

[0032] The slider is installed below the driver 1 and has dimensions matching those of the translation track.

[0033] Preferably, the driver 1 also includes:

[0034] Servo motor;

[0035] A reducer, which is installed at the output end of the servo motor;

[0036] A gear is connected to the output end of the reducer, and the size of the gear is matched with the rack one and the rack two respectively.

[0037] Preferably, the auxiliary plate further comprises:

[0038] An optical axis slide rail is symmetrically mounted on the left and right sides of the second lifting cylinder;

[0039] A support rod, one end of which passes through the interior of the optical axis slide rail, and the other end of which is fixedly connected to the clamp mounting plate.

[0040] Preferably, the clamping jaw further comprises:

[0041] A telescopic cylinder mounted at a middle position of the lower surface of the clamping jaw mounting plate;

[0042] An adjusting block, which is symmetrically connected below the output shaft of the telescopic cylinder;

[0043] A claw rod is mounted on the lower end of the adjusting block.

[0044] Compared with the prior art, the present invention has the following beneficial effects:

[0045] The invention has a simple structure and is easy to use. The loading mechanism and the unloading mechanism are used to drive the cross shaft to move and perform loading and unloading operations. The leveling frame and the rotating frame are used to complete the processing surface conversion operation of the cross shaft, replacing the existing manual loading and unloading and processing surface conversion operations. It can not only save a lot of labor, so that one worker can take care of multiple processing equipment, but also improve the processing production efficiency without stopping the centerless grinder through effective cooperation between various mechanisms. At the same time, the whole machine can also effectively improve production safety and greatly reduce the safety hazards of workers during operation.

[0046] The leveling wheel can rotate under the drive of the driving wheel to support the two legs of the cross shaft. The lifting cylinder can drive the top frame to lift and lower, so as to lift the cross shaft and level it. The angle turntable can drive the leveling frame to rotate, so as to electrically change the angle of the cross shaft. The travel switch can cooperate with the controller inside the control box to control the movement process of the cross shaft on the loading rack. After one cross shaft is removed, the loading rack is rotated to make the other cross shaft reach the waiting position.

[0047] Driver one can move up and down along the correction track so that when it is necessary to process cross shafts of different sizes, the upper and lower sizes can be corrected and adjusted, making the whole machine suitable for the processing needs of cross shafts of various sizes and more practical. Driver two can move along the translation track so as to drive the loading mechanism and the unloading mechanism to translate and drive the cross shaft to move between the processing position and the loading rack and the unloading rack. The support rod can be telescopically moved inside the optical axis slide rail so as to improve the stability of the lifting cylinder two when it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0049] Figure 2 It is a schematic diagram of the assembled three-dimensional structure of the loading rack, loading mechanism, unloading rack and unloading mechanism of the present invention;

[0050] Figure 3 It is a schematic diagram of the three-dimensional structure of the leveling frame and the rotating frame of the present invention;

[0051] Figure 4 This is a schematic diagram of the three-dimensional structure of the material unloading rack of the present invention;

[0052] Figure 5 This is a schematic diagram of the three-dimensional structure of the loading rack of the present invention;

[0053] Figure 6 It is a rear perspective structural schematic diagram of the feeding mechanism of the present invention;

[0054] Figure 7 It is a schematic diagram of the three-dimensional structure of the feeding mechanism of the present invention.

[0055] In the figure: 1, machine base; 2, control box; 3, grinding wheel group; 4, workbench; 5, leveling frame; 51, leveling wheel; 52, driving wheel; 53, leveling motor; 6, rotating frame; 61, lifting cylinder 1; 62, top frame; 63, angle rotating table; 7, leveling sensor; 8, unloading frame; 81, chain; 82, sprocket; 83, rotating shaft; 84, reduction motor; 9, loading frame; 10, installation frame; 11, pillar; 12, loading mechanism; 121, correction track; 1211, rack 1; 1212, waterproof distribution box; 122, lifting cylinder 2; 123 , back plate; 1231, driver one; 1231a, servo motor; 1231b, reducer; 1231c, gear; 1232, driver two; 1233, electromagnetic reversing valve; 1234, slider; 124, auxiliary plate; 1241, optical axis slide rail; 1242, support rod; 125, clamping jaw mounting plate; 126, clamping jaw; 1261, telescopic cylinder; 1262, adjustment block; 1263, claw rod; 13, unloading mechanism; 14, translation track; 15, rack two; 16, drag chain; 17, backrest claw; 18, adjustment block; 19, travel switch. DETAILED DESCRIPTION

[0056] 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.

[0057] See also Figure 1-7 , an automatic loading and unloading device for a centerless grinder for processing a cross shaft, comprising:

[0058] A machine base 1, a control box 2 is installed at the front right side of the machine base 1, a grinding wheel group 3 is installed above the machine base 1, a workbench 4 is installed at the middle position inside the grinding wheel group 3, and the workbench 4 is used to support the cross shaft. When the grinding wheel group 3 rotates, the two legs of the cross shaft are processed;

[0059] The leveling frame 5 is arranged on the left side of the workbench 4. A rotating frame 6 is installed below the leveling frame 5. A leveling sensor 7 is installed on the rear side of the leveling frame 5. The leveling sensor 7 can detect whether the leveling is completed, so as to facilitate the next processing operation;

[0060] A material unloading rack 8 is installed at the left rear of the machine base 1, and a material loading rack 9 is installed at the right rear of the machine base 1. The material unloading rack 8 has the same structure as the material loading rack 9. A mounting frame 10 is installed below the material unloading rack 8 and the material loading rack 9, and the mounting frame 10 is fixed to the machine base 1;

[0061] The support column 11 is installed on the left and right sides of the rear of the grinding wheel group 3. A loading mechanism 12 is installed above the right support column 11, and a unloading mechanism 13 is installed above the left support column 11. The loading mechanism 12 and the unloading mechanism 13 have the same structure;

[0062] The feeding mechanism 12 also includes: a correction track 121, a lifting cylinder 122, a back plate 123, an auxiliary plate 124, a clamping claw mounting plate 125 and a clamping claw 126. The correction track 121 is installed on the upper right side of the auxiliary plate 124, the back plate 123 is installed on the rear side of the correction track 121, the lifting cylinder 122 is installed on the left side of the correction track 121, the output end of the lifting cylinder 122 is connected to the clamping claw mounting plate 125, and the clamping claw 126 is installed below the clamping claw mounting plate 125;

[0063] A translation track 14 is installed at the rear side of the loading mechanism 12 and the unloading mechanism 13. A rack 15 is fixed to the upper surface of the translation track 14. A drag chain 16 is installed at the rear side of the translation track 14.

[0064] The backing claw 17 is installed at the front end of the loading rack 9. An adjustment block 18 is installed at the lower end of the backing claw 17. A travel switch 19 is installed on the outer side of the adjustment block 18. The travel switch 19 can cooperate with the controller inside the control box 2 to control the movement process of the cross shaft on the loading rack 9, so that it stops when it moves to the backing claw 17. At the same time, after one cross shaft is removed, the loading rack 9 is rotated to start, so that the other cross shaft reaches the position of the backing claw 17.

[0065] The leveling frame 5 also includes:

[0066] Two sets of leveling wheels 51 are symmetrically mounted on the left and right ends of the upper side of the leveling frame 5, and the number of each set of leveling wheels 51 is set to two;

[0067] The driving wheel 52 is installed below the right leveling wheel 51 and meshes with the leveling wheel 51. The leveling wheel 51 can rotate under the drive of the driving wheel 52, thereby supporting the two legs of the cross shaft;

[0068] The leveling motor 53 is connected to the outside of the driving wheel 52 and forms a rotating structure with the driving wheel 52.

[0069] The rotary frame 6 also includes:

[0070] A lifting cylinder 61, which is installed inside the rotary frame 6;

[0071] The top frame 62 is connected to the upper output end of the lifting cylinder 61. The lifting cylinder 61 can drive the top frame 62 to move up and down so as to lift the cross shaft and level it;

[0072] The angle rotating platform 63 is installed at the bottom of the rotating frame 6 and forms a rotating structure with the rotating frame 6. The angle rotating platform 63 can drive the leveling frame 5 to rotate so as to electrically change the angle of the cross axis.

[0073] The unloading rack 8 also includes:

[0074] A chain 81 is installed inside the unloading rack 8, and the chain 81 is used to support the cross shaft;

[0075] The sprocket 82 is meshedly connected to the front and rear ends of the chain 81. The chain 81 can drive the cross shaft to move under the rotation of the sprocket 82;

[0076] A rotating shaft 83, which is installed between the two sprocket wheels 82 at the rear side;

[0077] The reduction motor 84 is connected to the outer side of the rotating shaft 83 and forms a rotating structure with the rotating shaft 83.

[0078] The correction track 121 also includes:

[0079] Rack 1211, which is installed on the right side of the correction track 121;

[0080] The waterproof distribution box 1212 is installed above the correction track 121.

[0081] The back plate 123 also includes:

[0082] The driver 1231 is installed on the rear right side of the back plate 123. The driver 1231 can move up and down along the correction track 121, so as to make correction and adjustment of the upper and lower sizes when processing cross shafts of different sizes, so that the whole machine is suitable for processing cross shafts of various sizes and has higher practicality.

[0083] The second driver 1232 is installed at the left side of the rear of the back plate 123, and the structure of the second driver 1232 is the same as that of the first driver 1231. The second driver 1232 can move along the translation track 14 to drive the loading mechanism 12 and the unloading mechanism 13 to translate and drive the cross shaft to move between the processing position and the loading rack 9 and the unloading rack 8;

[0084] The electromagnetic reversing valve 1233 is installed above the second driver 1232, and the electromagnetic reversing valve 1233 is used to adjust the direction of the driver;

[0085] The slider 1234 is installed below the driver 1231 and has a size matching that of the translation track 14. The slider 1234 can slide along the translation track 14.

[0086] The driver 1231 also includes:

[0087] Servo motor 1231a;

[0088] A speed reducer 1231b, which is installed at the output end of the servo motor 1231a;

[0089] Gear 1231c is connected to the output end of reducer 1231b, and the size of gear 1231c matches rack 1 1211 and rack 2 15 respectively.

[0090] The auxiliary board 124 also includes:

[0091] The optical axis slide rail 1241 is symmetrically mounted on the left and right sides of the lifting cylinder 122;

[0092] One end of the support rod 1242 passes through the interior of the optical axis slide rail 1241, and the other end is fixedly connected to the clamp mounting plate 125. The support rod 1242 can be telescopically moved inside the optical axis slide rail 1241 to improve the stability of the lifting cylinder 122 when working.

[0093] The clamping jaw 126 also includes:

[0094] The telescopic cylinder 1261 is mounted on the middle part of the lower surface of the clamping jaw mounting plate 125;

[0095] The adjusting block 1262 is symmetrically connected below the output shaft of the telescopic cylinder 1261. The telescopic cylinder 1261 can drive the adjusting blocks 1262 at both ends to telescope and adjust so as to clamp the cross shaft;

[0096] The claw rod 1263 is installed at the lower end of the adjustment block 1262. The claw rod 1263 can be installed at an upper or lower position on the adjustment block 1262 to facilitate size adjustment.

[0097] Working principle: For this type of automatic loading and unloading device for centerless grinder for processing cross shafts, first, the machine base 1 supports the grinding wheel group 3, the control box 2 contains the control elements of the whole machine, which can control the operation of the whole machine, the pillar 11 supports the unloading mechanism 13 and the loading mechanism 12, the mounting frame 10 supports the unloading rack 8 and the loading rack 9, the drag chain 16 is used to protect the wire, first place the cross shaft on the loading rack 9, and then start the unloading rack 8 and the loading rack 9 to work, the reduction motor 84 drives the rotating shaft 83 to rotate, the rotating shaft 83 drives the sprocket 82 to rotate, the sprocket 82 drives the chain 81 to rotate, the chain 81 drives the cross shaft from the rear end of the loading rack 9 to the front end of the upper rack 9, the cross shaft abuts against the backing claw 17, the backing claw 17 can be adjusted by the adjustment block 18 The installation position of the loading rack 9, at this time, the travel switch 19 detects the cross shaft and transmits the information to the control box 2, and the control box 2 controls the loading rack 9 to stop moving;

[0098] At the same time, the driver 1231 is started, and the servo motor 1231a in the driver 1231 drives the gear 1231c to rotate through the speed reducer 1231b, and the gear 1231c of the driver 1231 is meshed with the rack 1211, so that the correction track 121 and the waterproof distribution box 1212 move downward relative to the back plate 123, and the lifting cylinder 122 in the feeding mechanism 12 is started. The lifting cylinder 122 is extended, and the support rod 1242 is fixed downward inside the optical axis slide rail 1241, and the clamping claw mounting plate 125 is driven away from the auxiliary plate 124, so that the clamping claw 126 approaches the cross axis, and then the telescopic cylinder 1261 is started. The telescopic cylinder 1261 drives the claw rod 1263 to clamp the cross axis through the adjustment block 1262, and the cross axis is grabbed. At this time, the travel switch 19 detects that the cross axis is grabbed, and the control box 2 controls the feeding rack 9 to restart, so that the next cross axis can move to the position of the backing claw 17;

[0099] Then, the driver 2 1232 is started, and the gear 1231c in the driver 2 1232 meshes with the rack 2 15, so that the back plate 123 moves horizontally through the sliding action between the slider 1234 and the translation track 14. At the same time, the rotation direction of the servo motor 1231a can be changed by the electromagnetic reversing valve 1233 to control the direction of travel. The cross shaft is placed on the workbench 4, and the grinding wheel group 3 can be rotated to grind the cross shaft placed on the workbench 4. Then, when the cross shaft needs to be turned, the cross shaft is first grabbed by the unloading mechanism 13. The working mode of the unloading mechanism 13 is the same as that of the loading mechanism 12. The unloading mechanism 13 places the cross shaft on the leveling frame 5 and starts the leveling motor 5. 3 and the lifting cylinder 61 in the rotary frame 6, the lifting cylinder 61 drives the top frame 62 to lift the cross shaft, and then puts down the cross shaft, so that the cross shaft is supported on the leveling wheel 51, and the leveling motor 53 drives the driving wheel 52 to rotate, and the driving wheel 52 drives the leveling wheel 51 to rotate, so that the cross shaft is gradually leveled, and the leveling sensor 7 detects that the leveling of the cross shaft is completed, and the control box 2 controls the angle rotary table 63 to rotate, driving the cross shaft to rotate the angle, and then the cross shaft is moved to the workbench 4 through the unloading mechanism 13 for secondary processing. After the processing is completed, the unloading mechanism 13 moves the cross shaft to the unloading frame 8 to complete the unloading, and thus the use process of the automatic loading and unloading device for the centerless grinder for the entire cross shaft processing is completed.

[0100] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic loading and unloading device for a centerless grinder for cross shaft processing, characterized in that: include: A machine base (1), a control box (2) being installed at a front position on the right side of the machine base (1), a grinding wheel group (3) being installed above the machine base (1), and a workbench (4) being installed at a middle position inside the grinding wheel group (3); A leveling frame (5) is arranged on the left side of the workbench (4), a rotating frame (6) is installed below the leveling frame (5), and a leveling sensor (7) is installed on the rear side of the leveling frame (5); A material unloading rack (8) is installed at the rear left side of the machine base (1), and a material loading rack (9) is installed at the rear right side of the machine base (1). The material unloading rack (8) has the same structure as the material loading rack (9). A mounting frame (10) is installed below each of the material unloading rack (8) and the material loading rack (9), and the mounting frame (10) is fixed to the machine base (1); A support column (11) is installed on the left and right sides of the rear of the grinding wheel group (3); a loading mechanism (12) is installed above the right support column (11), and a unloading mechanism (13) is installed above the left support column (11); the loading mechanism (12) and the unloading mechanism (13) have the same structure; The feeding mechanism (12) further comprises: a correction track (121), a second lifting cylinder (122), a back plate (123), an auxiliary plate (124), a clamping claw mounting plate (125) and a clamping claw (126); the correction track (121) is mounted on the upper right side of the auxiliary plate (124); the back plate (123) is mounted on the rear side of the correction track (121); the second lifting cylinder (122) is mounted on the left side of the correction track (121); the output end of the second lifting cylinder (122) is connected to the clamping claw mounting plate (125); and the clamping claw (126) is mounted below the clamping claw mounting plate (125); A translation track (14) is installed on the rear side of the loading mechanism (12) and the unloading mechanism (13), a rack 2 (15) is fixed on the upper surface of the translation track (14), and a drag chain (16) is installed on the rear side of the translation track (14); A backing claw (17) is mounted on the front end of the loading rack (9), an adjustment block (18) is mounted on the lower end of the backing claw (17), and a travel switch (19) is mounted on the outer side of the adjustment block (18); The leveling frame (5) also includes: Leveling wheels (51), two groups of which are symmetrically mounted on the left and right ends of the upper side of the leveling frame (5), and the number of leveling wheels (51) in each group is set to two; A driving wheel (52) is installed below the leveling wheel (51) on the right side and meshes with the leveling wheel (51); a leveling motor (53), which is connected to the outside of the driving wheel (52) and forms a rotating structure with the driving wheel (52); The rotary frame (6) also includes: A lifting cylinder (61) installed inside the rotating frame (6); A top frame (62) connected to the upper output end of the lifting cylinder (61); An angle rotating table (63) is installed at the bottom of the rotating frame (6) and forms a rotating structure with the rotating frame (6); The unloading rack (8) also includes: A chain (81) installed inside the unloading rack (8); A sprocket (82) meshingly connected to the front and rear ends of the chain (81); A rotating shaft (83) installed between the two sprocket wheels (82) at the rear side; a reduction motor (84), which is connected to the outside of the rotating shaft (83) and forms a rotating structure with the rotating shaft (83); The correction track (121) also includes: Rack 1 (1211), which is installed on the right side of the correction track (121); A waterproof distribution box (1212), which is installed above the correction track (121); The back plate (123) further comprises: A driver 1 (1231) is installed on the rear right side of the back plate (123); A second driver (1232) is installed on the left side behind the back plate (123), and the structure of the second driver (1232) is the same as that of the first driver (1231); An electromagnetic reversing valve (1233), which is installed above the second driver (1232); A slider (1234) installed below the driver 1 (1231) and having dimensions matching those of the translation track (14); The driver 1 (1231) further includes: Servo motor (1231a); A reducer (1231b), which is installed at the output end of the servo motor (1231a); A gear (1231c) connected to the output end of the reducer (1231b), wherein the size of the gear (1231c) is respectively matched with the rack 1 (1211) and the rack 2 (15); The auxiliary plate (124) further comprises: An optical axis slide rail (1241) is symmetrically mounted on the left and right sides of the second lifting cylinder (122); A support rod (1242), one end of which passes through the interior of the optical axis slide rail (1241), and the other end of which is fixedly connected to the clamping claw mounting plate (125); The clamping jaw (126) further comprises: A telescopic cylinder (1261) mounted at a middle position of the lower surface of the clamping jaw mounting plate (125); An adjustment block (1262) symmetrically connected below the output shaft of the telescopic cylinder (1261); A claw rod (1263) mounted on the lower end of the adjustment block (1262); The automatic loading and unloading device for the centerless grinder for cross shaft processing comprises the following steps: Step 1: The machine base (1) supports the grinding wheel group (3); the control box (2) contains the control components of the whole machine and can control the operation of the whole machine; the support (11) supports the unloading mechanism (13) and the loading mechanism (12); the mounting frame (10) supports the unloading rack (8) and the loading rack (9); the drag chain (16) is used to protect the wires; the cross shaft is first placed on the loading rack (9); then the unloading rack (8) and the loading rack (9) are started; the reduction motor (84) drives the rotating shaft (8 3) rotate, the rotating shaft (83) drives the sprocket (82) to rotate, the sprocket (82) drives the chain (81) to rotate, the chain (81) drives the cross shaft to move from the rear end of the loading rack (9) to the front end of the upper rack (9), the cross shaft abuts against the backing claw (17), the backing claw (17) can be adjusted to the installation position of the loading rack (9) by the adjustment block (18), at this time, the travel switch (19) detects the cross shaft and transmits the information to the control box (2), and the control box (2) controls the loading rack (9) to stop moving; Step 2, simultaneously starting the driver 1 (1231), the servo motor (1231a) in the driver 1 (1231) drives the gear (1231c) to rotate through the speed reducer (1231b), the gear (1231c) of the driver 1 (1231) and the rack 1 (1211) mesh with each other, so that the correction track (121) and the waterproof distribution box (1212) move downward relative to the back plate (123), and the lifting cylinder 2 (122) in the feeding mechanism (12) is started, and the lifting cylinder 2 (122) extends, driving the support rod ( 1242) moves downward inside the optical axis slide rail (1241) to drive the clamping claw mounting plate (125) away from the auxiliary plate (124), so that the clamping claw (126) approaches the cross shaft, and then starts the telescopic cylinder (1261). The telescopic cylinder (1261) drives the claw rod (1263) to clamp the cross shaft through the adjustment block (1262) and grab the cross shaft. At this time, the travel switch (19) detects that the cross shaft is grabbed, and the control box (2) controls the loading rack (9) to restart, so that the next cross shaft can move to the position of the backing claw (17); Step 3, start the second driver (1232), the gear (1231c) in the second driver (1232) and the rack (15) are meshed with each other, so that the back plate (123) moves horizontally through the sliding action between the slider (1234) and the translation track (14), and at the same time, the rotation direction of the servo motor (1231a) can be changed through the electromagnetic reversing valve (1233) to control the direction of travel, and the cross shaft is placed on the workbench (4). The grinding wheel group (3) can be rotated to grind the cross shaft placed on the workbench (4). Then, when the cross shaft needs to be turned, the cross shaft is first grabbed by the unloading mechanism (13). The working method of the unloading mechanism (13) is the same as that of the loading mechanism (12). The unloading mechanism (13) places the cross shaft on the leveling frame (5) and starts the leveling motor. (53) and the lifting cylinder (61) in the rotary frame (6), the lifting cylinder (61) drives the top frame (62) to lift the cross shaft, and then lowers the cross shaft, so that the cross shaft is supported on the leveling wheel (51), the leveling motor (53) drives the driving wheel (52) to rotate, and the driving wheel (52) drives the leveling wheel (51) to rotate, so that the cross shaft is gradually leveled, and the leveling sensor (7) detects that the leveling of the cross shaft is completed, and the control box (2) controls the angle rotary table (63) to rotate, driving the cross shaft to rotate the angle, and then the cross shaft is moved to the workbench (4) through the unloading mechanism (13) for secondary processing. After the processing is completed, the unloading mechanism (13) moves the cross shaft to the unloading frame (8) to complete the unloading, thus completing the use process of the automatic loading and unloading device for the centerless grinder for cross shaft processing.

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