Automatic feeding device of centerless grinding machine

Abstract

The utility model discloses an automatic feeding device of a centerless grinding machine, and relates to the technical field of workpiece feeding, the automatic feeding device of the centerless grinding machine comprises a centerless grinding machine, the centerless grinding machine comprises a grinding machine body, the grinding machine body is movably connected with an adjusting mechanism, and the adjusting mechanism is fixedly connected with a grinding wheel mechanism. A guide wheel mechanism corresponding to the grinding wheel mechanism is arranged on the other side of the top of the grinding machine body; the feeding mechanism comprises a guide rail mechanism, the guide rail mechanism is fixedly connected to the side face of the grinding machine body through a fixing support, and the end of the guide rail mechanism extends to the bottom between the grinding wheel mechanism and the guide wheel mechanism; according to the utility model, all workpieces needing to be polished are placed in the temporary storage box, and the workpieces are cylindrical, so that the inclined material plates which are obliquely arranged are matched with the dead weight of the workpieces, so that the workpieces roll towards the space between the two inclined material plates, the automatic falling of the workpieces is realized, the workpieces do not need to be manually placed on a V-shaped guide rail by a worker, and the automatic blanking is realized.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of workpiece feeding, in particular to an automatic feeding device for a centerless grinder. Background Art

[0002] A centerless grinder is a mechanical device used to grind the outer circle of sleeve-like parts. The working principle of a centerless grinder is unique. It does not require clamping the center of the workpiece, but instead uses a grinding wheel, a guide wheel, and a support plate to grind the workpiece. The worker places the workpiece on the guide rail, and the feed mechanism pushes the workpiece to move between the grinding wheel and the guide wheel. The grinding wheel and the guide wheel drive the workpiece to rotate on the bracket, and the outer circle of the workpiece is ground through friction at the contact position.

[0003] However, in practice, people have noticed that most of the current feeding mechanisms require workers to manually place the workpieces on the guide rails, and only one workpiece can be placed at a time. After the workpiece is placed, the feeding mechanism is started to push the workpiece to move and complete the feeding. The feeding efficiency of the workpiece is low, and this process requires workers to stand and operate for a long time, which is labor-intensive. After working for a long time, it is easy to cause fatigue of the workers. Fatigue can easily cause inattention, leading to misoperation and affecting processing safety. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic feeding device for a centerless grinder. The driving mechanism converts circular motion into linear motion, automatically and continuously feeding the workpiece. In conjunction with an automatic unloading mechanism installed at the end of the feeding mechanism, the device achieves single and continuous feeding of the workpiece, eliminating the need for workers to manually place the workpiece onto the feeding mechanism. This increases the efficiency of workpiece feeding while reducing labor intensity. This solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] An automatic feeding device for a centerless grinder includes a centerless grinder, the centerless grinder includes a grinding machine bed, an adjustment mechanism is movably connected to the grinding machine bed, a grinding wheel mechanism is fixedly connected to the adjustment mechanism, and a guide wheel mechanism corresponding to the grinding wheel mechanism is provided on the other side of the top of the grinding machine bed;

[0007] The feed mechanism includes a guide rail mechanism, which is fixedly connected to the side of the grinding machine bed through a fixed bracket, and the end of the guide rail mechanism extends to the bottom between the grinding wheel mechanism and the guide wheel mechanism. The other end of the guide rail mechanism is movably connected to the reciprocating movement mechanism, and the end of the guide rail mechanism is fixedly connected to the driving mechanism;

[0008] An automatic unloading mechanism for automatic unloading is provided on the top of the reciprocating mechanism. The automatic unloading mechanism is located above the reciprocating mechanism and is fixedly connected to the top of the fixed bracket.

[0009] As a further technical solution of the present invention, the automatic unloading mechanism includes a temporary storage box arranged in a rectangular shape, and a discharge port is provided at the bottom of the temporary storage box, and inclined material plates are symmetrically provided on both sides of the discharge port, and the top of the inclined material plate is movably connected to the two sides of the temporary storage box through a pin shaft.

[0010] As a further technical solution of the present invention, the two ends of the bottom of the temporary storage box extend downward to the two ends of the inclined material plate, and the ends of the extended parts are welded with horizontal plates, and the horizontal plates are threadedly connected with threaded push rods, and the ends of the threaded push rods are in contact with the outer side of the inclined material plate.

[0011] As a further technical solution of the present invention, a support frame is welded to the top of the fixed bracket in a rectangular array, and the top of the support frame is bolted to the temporary storage box.

[0012] As a further technical solution of the present invention, the guide rail mechanism includes an integrally arranged longitudinal base and a V-shaped guide rail, one end of the longitudinal base extends to the bottom between the grinding wheel mechanism and the guide wheel mechanism, and the bottom of the longitudinal base is bolted to the grinding machine bed, and a sliding cavity is provided at the other end of the longitudinal base, and a center rod is provided at the center position of the sliding cavity, and an upper sliding groove and a lower sliding groove are respectively provided at the bottom of the longitudinal base and the bottom of the V-shaped guide rail.

[0013] As a further technical solution of the present invention, the reciprocating mechanism includes a slider, which is slidably connected to the sliding cavity on the inner side of the longitudinal base. A positioning hole corresponding to the center rod is opened on the slider, and the positioning hole and the center rod are slidably matched.

[0014] As a further technical solution of the present invention, the top of the slider is integrally provided with a top plate, and the top plate passes through the upper slide groove and extends to the bottom of the inclined material plate. A gear rod is welded on the side of the top plate, and a reinforcing rib is welded at the angle between the gear rod and the top plate. The bottom of the reinforcing rib passes through the upper slide groove and is welded to the slider.

[0015] As a further technical solution of the present invention, the driving mechanism includes an L-shaped bracket fixedly connected to the end of the guide rail mechanism, and a driving motor is fixedly connected to the L-shaped bracket. The output shaft of the driving motor passes through the L-shaped bracket and extends to the bottom, and the end of the output shaft is fixedly connected to a rotating rocker.

[0016] As a further technical solution of the present invention, the bottom of the slider is fixedly connected with a connecting pin, the bottom of one end of the rotating rocker is fixedly connected with a fixing pin, and a connecting rod is provided between the fixing pin and the connecting pin, and the two ends of the connecting rod are movably connected with the fixing pin and the connecting pin respectively.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model drives the rotating rocker to perform circular motion by a driving motor, and the fixed pin at the end of the rotating rocker drives the slider to slide back and forth in the longitudinal base through the connecting rod, thereby realizing automatic feeding of the workpiece, so that the top plate on the slider continuously pushes the workpiece to move between the grinding wheel mechanism and the guide wheel mechanism for grinding processing, thereby realizing automatic unloading of the workpiece, eliminating the need for manual unloading by workers, and reducing labor intensity;

[0019] The utility model first adjusts the distance between the two inclined material plates according to the diameter of the workpiece to ensure that the distance between the symmetrically arranged inclined material plates can only pass one workpiece, and then all the workpieces to be polished are placed in the temporary storage box. Since the workpiece is a cylinder, the inclined material plates are inclined to cooperate with the dead weight of the workpiece to make the workpiece roll toward the distance between the two inclined material plates, thereby realizing the automatic falling of the workpiece. There is no need for the staff to manually place the workpiece on the V-shaped guide rail, thereby realizing automatic unloading and improving the processing efficiency. At the same time, there is no need to check the unloading status of the workpiece for a long time, further reducing the labor intensity of the staff and preventing safety problems caused by improper operation due to fatigue.

[0020] According to the utility model, when the slider drives the top plate to push the workpiece toward the side close to the grinding wheel mechanism, the blocking rod on the side of the top plate follows the top plate to move to the gap between the two inclined material plates to block the workpiece, thereby realizing single unloading of the workpiece and preventing the workpiece from piling up and affecting normal feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0022] Figure 2 This utility model Figure 1 Another perspective of the picture.

[0023] Figure 3 It is a schematic diagram of the feeding mechanism in the utility model.

[0024] Figure 4 This utility model Figure 3 A partial enlarged schematic diagram.

[0025] Figure 5 It is a three-dimensional structural diagram of the guide rail mechanism in the utility model.

[0026] Figure 6 This utility model Figure 5 A partial enlarged schematic diagram.

[0027] Figure 7 This utility model Figure 5 Schematic diagram of the bottom structure.

[0028] Figure 8 It is a three-dimensional structural diagram of the reciprocating mechanism in the utility model.

[0029] Figure 9 This utility model Figure 8 Schematic diagram of the bottom structure.

[0030] Figure 10 It is a three-dimensional structural diagram of the driving mechanism in the utility model.

[0031] Figure 11 This utility model Figure 10 Schematic diagram of the bottom structure.

[0032] Figure 12 It is a schematic diagram of the bottom structure of the automatic unloading mechanism in the utility model.

[0033] Figure 13 This utility model Figure 12 Top view of .

[0034] Figure 14 This utility model Figure 13 CC top view.

[0035] In the picture:

[0036] Grinding machine bed -1, adjustment mechanism -2, grinding wheel mechanism -3, guide wheel mechanism -4, guide rail mechanism -5, longitudinal base -51, V-shaped guide rail -52, upper slide groove -53, lower slide groove -54, center rod -55, reciprocating movement mechanism -6, slider -61, positioning hole -62, top plate -63, gear lever -64, connecting pin -65, driving mechanism -7, L-shaped bracket -71, driving motor -72, rotating rocker -73, fixing pin -74, automatic unloading mechanism -8, temporary storage box -81, inclined material plate -82, horizontal plate -83, threaded push rod -84, fixed bracket -9, connecting rod -10. DETAILED DESCRIPTION

[0037] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-14 The embodiment of the utility model provides an automatic feeding device for a centerless grinder, comprising a centerless grinder, the centerless grinder comprising a grinding machine bed 1, an adjusting mechanism 2 being movably connected to the grinding machine bed 1, a grinding wheel mechanism 3 being fixedly connected to the adjusting mechanism 2, and a guide wheel mechanism 4 corresponding to the grinding wheel mechanism 3 being provided on the other side of the top of the grinding machine bed 1;

[0039] The feed mechanism includes a guide rail mechanism 5, which is fixedly connected to the side of the grinding machine bed 1 through a fixed bracket 9, and the end of the guide rail mechanism 5 extends to the bottom between the grinding wheel mechanism 3 and the guide wheel mechanism 4. The other end of the guide rail mechanism 5 is movably connected to the reciprocating movement mechanism 6, and the end of the guide rail mechanism 5 is fixedly connected to the driving mechanism 7;

[0040] An automatic unloading mechanism 8 for automatic unloading is provided on the top of the reciprocating mechanism 6 . The automatic unloading mechanism 8 is located above the reciprocating mechanism 6 and is fixedly connected to the top of the fixed bracket 9 .

[0041] In this embodiment, the automatic unloading mechanism 8 includes a temporary storage box 81 arranged in a rectangular shape, and a discharge port is provided at the bottom of the temporary storage box 81, and inclined material plates 82 are symmetrically provided on both sides of the discharge port. The top of the inclined material plate 82 is movably connected to the two sides of the temporary storage box 81 through a pin shaft.

[0042] In this embodiment, the two ends of the bottom of the temporary storage box 81 extend downward to the two ends of the inclined material plate 82, and the ends of the extended parts are welded with horizontal plates 83, and the horizontal plates 83 are threadedly connected with threaded push rods 84, and the ends of the threaded push rods 84 are in contact with the outer sides of the inclined material plate 82.

[0043] By adopting the above technical solution, first, the spacing between the two inclined material plates 82 is adjusted according to the diameter of the workpiece, and the threaded push rod 84 is rotated to adjust the position of the threaded push rod 84 on the inner side of the cross plate 83. As the threaded push rod 84 moves, the inclined material plate 82 rotates at the bottom of the temporary storage box 81, and the ends of the symmetrically arranged inclined material plates 82 move closer to or away from each other. Correspondingly, the spacing between the two inclined material plates 82 also changes, so that the spacing between the two inclined material plates 82 can only accommodate one workpiece to pass through. The workpiece is placed in the temporary storage box 81. Since the inclined material plates 82 are inclined, the workpiece will roll to the gap between the two inclined material plates 82 with the weight of the workpiece. Since the opening between the inclined material plates 82 only allows one to pass through, the continuous supply of a single workpiece during feeding is achieved.

[0044] In this embodiment, a support frame 91 is welded to the top of the fixed bracket 9 in a rectangular array. The top of the support frame 91 is bolted to the temporary storage box 81 to support the automatic unloading mechanism 8 as a whole.

[0045] In this embodiment, the guide rail mechanism 5 includes an integrally arranged longitudinal base 51 and a V-shaped guide rail 52. One end of the longitudinal base 51 extends to the bottom between the grinding wheel mechanism 3 and the guide wheel mechanism 4, and the bottom of the longitudinal base 51 is bolted to the grinding machine bed 1. A sliding cavity is provided at the other end of the longitudinal base 51, and a center rod 55 is provided at the center position of the sliding cavity. The bottom of the longitudinal base 51 and the bottom of the V-shaped guide rail 52 are respectively provided with an upper sliding groove 53 and a lower sliding groove 54.

[0046] By adopting the above technical solution, the workpiece in the temporary storage box 81 falls above the end of the V-shaped guide rail 52, and the reciprocating mechanism 6 pushes the workpiece to slide on the V-shaped guide rail 52 until the workpiece on the V-shaped guide rail 52 moves between the grinding wheel mechanism 3 and the guide wheel mechanism 4, thereby realizing automatic feeding of the workpiece and reducing labor intensity.

[0047] In this embodiment, the reciprocating mechanism 6 includes a slider 61, which is slidably connected to the sliding cavity inside the longitudinal base 51. A positioning hole 62 corresponding to the center rod 55 is opened on the slider 61, and the positioning hole 62 and the center rod 55 are slidably matched.

[0048] In this embodiment, the top of the slider 61 is integrally provided with a top plate 63, and the top plate 63 passes through the upper slide groove 53 and extends to the bottom of the inclined material plate 82. A gear rod 64 is welded to the side of the top plate 63, and a reinforcing rib is welded at the angle between the gear rod 64 and the top plate 63. The bottom of the reinforcing rib passes through the upper slide groove 53 and is welded to the slider 61.

[0049] By adopting the above technical solution, during feeding, the slider 61 drives the top plate 63 to move on the V-shaped guide rail 52, pushing the workpiece on the V-shaped guide rail 52 to move closer to the grinding wheel mechanism 3. At the same time, the gear rod 64 follows the top plate 63 to move on the lower side of the inclined material plate 82 to directly below the inclined material plate 82, blocking the workpiece at the outlet of the inclined material plate 82 from falling. During the return stroke, the top plate 63 drives the gear rod 64 to move to the side of the inclined material plate 82, and the top plate 63 is located at the end of the inclined material plate 82. At this time, there is no obstruction at the bottom of the inclined material plate 82, and the workpiece in the inclined material plate 82 falls directly onto the V-shaped guide rail 52, and then the top plate 63 pushes the workpiece to move again, realizing a single continuous supply of workpieces during automatic unloading, thereby improving the feeding efficiency of the workpieces.

[0050] In this embodiment, the driving mechanism 7 includes an L-shaped bracket 71 fixedly connected to the end of the guide rail mechanism 5, and a driving motor 72 is fixedly connected to the L-shaped bracket 71. The output shaft of the driving motor 72 passes through the L-shaped bracket 71 and extends to the bottom, and the end of the output shaft is fixedly connected to a rotating rocker 73.

[0051] In this embodiment, the bottom of the slider 61 is fixedly connected to a connecting pin 65, the bottom of one end of the rotating rocker 73 is fixedly connected to a fixing pin 74, and a connecting rod 10 is provided between the fixing pin 74 and the connecting pin 65, and the two ends of the connecting rod 10 are movably connected to the fixing pin 74 and the connecting pin 65 respectively.

[0052] By adopting the above technical solution, the driving motor 72 drives the rotating rocker 73 to rotate, and the end of the rotating rocker 73 is movably connected to the end of the connecting rod 10 through the fixing pin 74, and the other end of the connecting rod 10 is movably connected to the bottom of the slider 61 through the connecting pin shaft 65, so that the rotating rocker 73 rotates while driving the slider 61 to slide in the sliding cavity at the end of the guide rail mechanism 5, converting the circular motion into reciprocating linear motion, realizing automatic continuous feeding, and further improving the feeding efficiency.

[0053] In this embodiment, the L-shaped bracket 71 consists of a horizontal plate and a vertical plate perpendicular to the horizontal plate. The vertical plate is bolted to the end of the longitudinal base 51 away from the grinding machine bed 1, fixing the drive motor 72 to the side of the guide rail mechanism 5, and the end of the center rod 55 is connected to the vertical plate bolt to support the other end of the center rod 55.

[0054] In this embodiment, the drive motor 72 is bolted to one end of the top of the horizontal plate, and the other end of the horizontal plate is bolted to the bottom of one end of the guide rail mechanism 5. The firmness after fixation is improved by mutual cooperation with the longitudinal plate to prevent the connection from loosening due to long-term use. The output shaft of the drive motor 72 is bolted to the end of the rotating rocker 73.

[0055] In this embodiment, the end of the longitudinal base 51 away from the grinding machine bed 1 passes through the support frame 91, and a crossbeam is welded in the support frame 91 to the bottom of the longitudinal base 51. The crossbeam is fixed to the bottom of the longitudinal base 51 by bolts to support the end of the longitudinal base 51 and improve stability during use.

[0056] In this embodiment, the adjustment mechanism 2 is provided with a fixed seat, a sliding seat and a threaded screw, the fixed seat is fixedly connected to the grinding machine bed 1, the threaded screw passes through the sliding seat, and the two ends of the threaded screw are rotatably connected to the fixed seat through bearings, the sliding seat is slidably connected to the top of the fixed seat, and the sliding seat is threadedly engaged with the threaded screw;

[0057] The threaded screw is rotated and rotated on the fixed seat. Due to the threaded fit between the threaded screw and the sliding seat, the sliding seat is pushed to slide on the fixed seat, thereby driving the grinding wheel mechanism 3 fixedly connected to the sliding seat to move (the grinding machine belongs to the existing technology, and the present utility model only improves the feeding device, and the rest will not be repeated).

[0058] In this embodiment, the grinding wheel mechanism 3 and the guide wheel mechanism 4 are respectively located on both sides above the V-shaped guide rail 52. The workpiece moves on the V-shaped guide rail 52 to between the grinding wheel mechanism 3 and the guide wheel mechanism 4. The rotating grinding wheel mechanism 3 and the guide wheel mechanism 4 are in contact with the surface of the workpiece, driving the workpiece to rotate, and the outer circle of the workpiece is ground by the grinding wheel mechanism 3 (the grinding machine belongs to the existing technology, and the present utility model only improves the feeding device, and the rest will not be repeated).

[0059] The working principle of the present invention is as follows: when in use, first adjust the distance between the two inclined material plates 82 according to the diameter of the workpiece, rotate the threaded push rod 84, and adjust the position of the threaded push rod 84 on the inner side of the cross plate 83. As the threaded push rod 84 moves, the inclined material plate 82 rotates at the bottom of the temporary storage box 81, and the ends of the symmetrically arranged temporary storage box 81 move closer to or away from each other so that the distance can only accommodate one workpiece to pass through. Then the workpiece is placed inside the temporary storage box 81, and the driving motor 72 drives the rotating rocker 73 to rotate. The rotating rocker 73 drives the slider 61 to slide in the sliding cavity at the end of the longitudinal base 51 through the connecting rod 10, converting the circular motion into reciprocating linear motion. The workpiece inside the temporary storage box 81 falls onto the V-shaped guide rail 52 through the inclined material plate 82, and the slider 61 pushes the workpiece in the V-shaped guide rail 52 through the top plate 63. The workpiece in the inclined material plate 82 falls onto the V-shaped guide rail 52 again, realizing single continuous feeding during the feeding process. The slider 61 pushes the workpiece to move again through the top plate 63, and the above description is repeated to realize continuous feeding of the workpiece. The workpiece moves between the grinding wheel mechanism 3 and the guide wheel mechanism 4, and the grinding wheel mechanism 3 and the guide wheel mechanism 4 drive the workpiece to rotate, and the ground workpiece is removed from the other end of the V-shaped guide rail 52. The structure is simple, the operation is very convenient, and the labor intensity is effectively reduced.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0061] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Automatic feeding device of centerless grinder, characterized by: The centerless grinder comprises a grinding machine bed (1), an adjusting mechanism (2) is movably connected to the grinding machine bed (1), a grinding wheel mechanism (3) is fixedly connected to the adjusting mechanism (2), and a guide wheel mechanism (4) corresponding to the grinding wheel mechanism (3) is provided on the other side of the top of the grinding machine bed (1); The feeding mechanism includes a guide rail mechanism (5), the guide rail mechanism (5) is fixedly connected to the side of the grinding machine bed (1) through a fixed bracket (9), and the end of the guide rail mechanism (5) extends to the bottom between the grinding wheel mechanism (3) and the guide wheel mechanism (4), the other end of the guide rail mechanism (5) is movably connected to the reciprocating movement mechanism (6), and the end of the guide rail mechanism (5) is fixedly connected to the driving mechanism (7); An automatic unloading mechanism (8) for automatic unloading is provided on the top of the reciprocating mechanism (6). The automatic unloading mechanism (8) is located above the reciprocating mechanism (6) and is fixedly connected to the top of the fixed bracket (9).

2. The automatic feeding device for a centerless grinder according to claim 1, characterized in that: The automatic unloading mechanism (8) includes a rectangular temporary storage box (81), and a discharge port is provided at the bottom of the temporary storage box (81). Inclined material plates (82) are symmetrically provided on both sides of the discharge port. The tops of the inclined material plates (82) are movably connected to both sides of the temporary storage box (81) through pins.

3. The automatic feeding device for a centerless grinder according to claim 2, characterized in that: The two ends of the bottom of the temporary storage box (81) extend downward to the two ends of the inclined material plate (82), and the ends of the extended portion are welded with a transverse plate (83), a threaded push rod (84) is threadedly connected in the transverse plate (83), and the end of the threaded push rod (84) is in contact with the outer side of the inclined material plate (82).

4. The automatic feeding device for a centerless grinder according to claim 3, characterized in that: The top of the fixed bracket (9) is welded with a support frame (91) in a rectangular array, and the top of the support frame (91) is bolted to the temporary storage box (81).

5. The automatic feeding device for a centerless grinder according to claim 1, characterized in that: The guide rail mechanism (5) includes an integrally arranged longitudinal base (51) and a V-shaped guide rail (52), one end of the longitudinal base (51) extends to the bottom between the grinding wheel mechanism (3) and the guide wheel mechanism (4), and the bottom of the longitudinal base (51) is bolted to the grinding machine bed (1), the other end of the longitudinal base (51) is provided with a sliding cavity, and a center rod (55) is provided at the center of the sliding cavity, and the bottom of the longitudinal base (51) and the bottom of the V-shaped guide rail (52) are respectively provided with an upper sliding groove (53) and a lower sliding groove (54).

6. The automatic feeding device for a centerless grinder according to claim 1, characterized in that: The reciprocating mechanism (6) includes a slider (61) which is slidably connected to a sliding cavity inside the longitudinal base (51). A positioning hole (62) corresponding to the center rod (55) is provided on the slider (61), and the positioning hole (62) and the center rod (55) are slidably matched.

7. The automatic feeding device for a centerless grinder according to claim 6, characterized in that: The top of the slider (61) is integrally provided with a top plate (63), and the top plate (63) passes through the upper slide groove (53) and extends to the bottom of the inclined material plate (82). A stop rod (64) is welded to the side of the top plate (63), and a reinforcing rib is welded at the angle between the stop rod (64) and the top plate (63), and the bottom of the reinforcing rib passes through the upper slide groove (53) and is welded to the slider (61).

8. The automatic feeding device for a centerless grinder according to claim 1, characterized in that: The driving mechanism (7) comprises an L-shaped bracket (71) fixedly connected to the end of the guide rail mechanism (5), a driving motor (72) fixedly connected to the L-shaped bracket (71), an output shaft of the driving motor (72) extending through the L-shaped bracket (71) to the bottom, and a rotating rocker (73) fixedly connected to the end of the output shaft.

9. The automatic feeding device for a centerless grinder according to claim 6, characterized in that: The bottom of the slider (61) is fixedly connected to a connecting pin (65), the bottom of one end of the rotating rocker (73) is fixedly connected to a fixing pin (74), and a connecting rod (10) is provided between the fixing pin (74) and the connecting pin (65), and the two ends of the connecting rod (10) are movably connected to the fixing pin (74) and the connecting pin (65) respectively.

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