Gantry grinding machine

Abstract

The utility model discloses a planogrinder which comprises a base platform extending along an X axis; the carrying table can move on the base table along the X axis; the two gantry stand columns are connected with the base station; the gantry cross beam is connected with the two gantry stand columns and extends along a Y axis perpendicular to the X axis; a sliding table capable of moving along the Y axis is arranged on the gantry cross beam; the sliding table is provided with a vertical sliding rail extending in the Z-axis direction perpendicular to the X axis and the Y axis, and a sliding base is installed on the vertical sliding rail in a sliding mode and can move along the Z axis relative to the sliding table. The sliding seat is provided with a rotating motor, the rotating motor is provided with a first rotating shaft, the first rotating shaft extends along the R axis and is parallel to the X axis, a grinding wheel spindle is connected with the first rotating shaft in front of the sliding seat and comprises a grinding wheel and a spindle motor, the spindle motor is provided with a second rotating shaft to drive the grinding wheel to rotate, and the first rotating shaft can drive the whole grinding wheel spindle to rotate. And a second rotating shaft of the grinding wheel main shaft is rotationally switched between a vertical state parallel to the Z axis and a horizontal state parallel to the Y axis.

Description

[Technical field]

[0001] The utility model relates to a gantry grinder, in particular to a gantry grinder which can directly process five to-be-processed surfaces of a workpiece. [Background technology]

[0002] In general gantry grinders, the grinding wheel spindle is fixed on the gantry beam. If the grinding wheel spindle is placed vertically up and down, the grinding wheel is placed horizontally, and the circumferential surface of the grinding wheel can only contact the four horizontal sides of the workpiece at most, and cannot directly process the top surface of the workpiece. The workpiece needs to be flipped once, and the top surface of the workpiece needs to be flipped to the horizontal side of the workpiece, so that the existing grinder can process the original top surface of the workpiece. However, once the workpiece is flipped, the tool must be re-calibrated, which is time-consuming and affects the processing accuracy. In addition, if the mass of the workpiece is large, there is also the problem of difficulty in flipping. Alternatively, an additional horizontally placed grinding wheel spindle is set on the gantry beam, and the additional grinding wheel is placed vertically, and its circumferential surface can contact the top surface of the workpiece, but such a design will significantly increase the manufacturing cost and the load of the gantry beam. [Contents of the utility model]

[0003] In view of the background technology, the applicant provides a gantry grinder, which uses a rotating motor to enable the grinding wheel spindle to rotate around a first rotating axis parallel to the X-axis, so that the grinding wheel spindle can rotate and switch between a vertical state parallel to the Z-axis and a horizontal state parallel to the Y-axis, and the grinding wheel can process multiple surfaces to be processed of the workpiece.

[0004] In order to achieve the above purpose, the utility model adopts the following technical means:

[0005] A gantry grinder, comprising: a base extending along the X-axis; a carrier on the base movable along the X-axis; two gantry columns connected to the base; a gantry beam connecting the two gantry columns, the gantry beam extending along the Y-axis perpendicular to the X-axis; a slide table movable along the Y-axis is provided on the gantry beam; the slide table has a vertical slide rail extending along the Z-axis direction perpendicular to the X-axis and the Y-axis, a slide seat is slidably mounted on the vertical slide rail and can move relative to the slide table along the Z-axis; the slide seat is mounted with a rotating motor, the rotating motor The machine has a first rotating shaft, the axis of the first rotating shaft is parallel to the X-axis, a grinding wheel spindle is connected to the first rotating shaft in front of the slide, the grinding wheel spindle includes a grinding wheel and a spindle motor, the spindle motor has a second rotating shaft, the second rotating shaft drives the grinding wheel to rotate, the first rotating shaft can drive the grinding wheel spindle to rotate as a whole, so that the second rotating shaft of the grinding wheel spindle can rotate and switch between a vertical state parallel to the Z-axis and a horizontal state parallel to the Y-axis, and the grinding wheel can process multiple surfaces to be processed of the workpiece.

[0006] Further, when the second rotating shaft is in a vertical state, the grinding wheel spindle is defined as rotating 0 degrees, and the rotatable range of the grinding wheel spindle is from -90 degrees to +90 degrees.

[0007] Furthermore, the grinding wheel spindle also includes a grinding wheel cover and a grinding wheel cover rotating mechanism, the grinding wheel cover covers a portion of the grinding wheel, and the grinding wheel cover has an opening, the opening is oriented perpendicular to the second rotating axis, so that the circumferential surface of the grinding wheel is exposed, and the grinding wheel cover rotating mechanism includes an eccentric motor, and the eccentric motor drives the grinding wheel cover to rotate around the second rotating axis.

[0008] Furthermore, the grinding wheel cover rotation mechanism also includes a base plate, a driving gear and a driven gear, the eccentric motor is fixed on the side of the base plate facing away from the grinding wheel, the rotating shaft of the eccentric motor passes through the base plate and is connected to the driving gear on the side of the base plate facing the grinding wheel, the driving gear is meshed with the driven gear, the driven gear is located radially outside the driving gear, the driven gear is sleeved on the second rotating shaft and is located between the base plate and the grinding wheel, and the grinding wheel cover is fixed to the driven gear and rotates with the driven gear.

[0009] Furthermore, the number of teeth of the driven gear is greater than the number of teeth of the driving gear.

[0010] Furthermore, the gantry grinder has a control module, and the eccentric motor is controlled by the control module to automatically operate so that the opening is always facing the surface to be processed that is contacted by the grinding wheel.

[0011] Furthermore, the front surface of the slide has a receiving space that is recessed backwards, a bearing is arranged in the receiving space, the rotating motor is installed on the rear side of the slide, and the first rotating shaft passes through the bearing to be installed and fixed with the grinding wheel spindle.

[0012] Furthermore, the base has a first driving device and a first horizontal slide rail parallel to the X-axis, the carrier is slidably installed on the first horizontal slide rail, the first driving device drives the carrier to move along the first horizontal slide rail, the gantry beam has a second driving device and a second horizontal slide rail parallel to the Y-axis, the slide is slidably installed on the second horizontal slide rail, the second driving device drives the slide to move along the second horizontal slide rail, and a third driving device is installed on the slide to drive the slide to move along the vertical slide rail.

[0013] Furthermore, the slide includes a mounting portion located on the upper side of the gantry beam and a carrying portion located on the front side of the gantry beam, the slide seat and the vertical slide rail are arranged on the front side of the carrying portion, and the third drive device is installed on the top surface of the carrying portion.

[0014] Furthermore, the gantry grinder also includes a plurality of foldable shields for covering the first drive device, the first horizontal slide rail, the second drive device and the second horizontal slide rail, two of the foldable shields are installed at both ends of the base along the X-axis and connected to the carrier, and extend and retract along the X-axis as the carrier moves, and two of the foldable shields are installed at both ends of the gantry beam along the Y-axis and connected to the slide, and extend and retract along the Y-axis as the slide moves.

[0015] The above-mentioned technical means have the following technical effects: the grinding wheel spindle is installed on the rotating motor, so that the grinding wheel spindle can rotate around the first rotating axis parallel to the X-axis, and the second rotating axis of the grinding wheel spindle can be transformed from a vertical state parallel to the Z-axis to a horizontal state parallel to the Y-axis, so that the grinding wheel facing the side of the workpiece can be rotated to the top surface of the workpiece, and the circumferential surface of the grinding wheel can face the top surface of the workpiece on the workpiece. There is no need to flip the workpiece or set up an additional grinding wheel spindle, and the surfaces to be processed on the side and top surfaces of the workpiece can be processed. The rotating motor can move along the Y-axis through the slide and move along the Z-axis through the slide seat. The positioning is accurate and controllable, and the installation error is small. It can realize precision grinding of multiple surfaces to be processed of large workpieces with high processing accuracy requirements such as machine tool guide rails.

Brief Description of the Drawings

[0016] Figure 1 It is a three-dimensional diagram of the gantry grinder of the utility model;

[0017] Figure 2 is a schematic diagram of a first horizontal slide rail and a second horizontal slide rail;

[0018] Figure 3 for Figure 1 Schematic diagram of the top surface of a workpiece processed by a gantry grinder;

[0019] Figure 4 for Figure 3 A partial front view of

[0020] Figure 5 for Figure 3 Exploded diagram of the grinding wheel spindle, grinding wheel cover, slide seat and slide table;

[0021] Figure 6 This is a schematic diagram of the right side of a workpiece being machined by a gantry grinder;

[0022] Figure 7 This is a schematic diagram of the front side of a workpiece being machined by a gantry grinder;

[0023] Figure 8 This is a schematic diagram of the left side of a workpiece being machined by a gantry grinder;

[0024] Fig. 9This is a schematic diagram of the rear side of a workpiece being machined by a gantry grinder.

[0025] Description of Figure Numbers:

[0026] Gantry Grinding Machine 1000 Base 1 Carrier 2

[0027] Gantry column 3 Gantry beam 4 Slide 5

[0028] Mounting part 51 Carrying part 52 Sliding seat 6

[0029] Bearing 61 First rotating shaft 7 Grinding wheel spindle 8

[0030] Grinding wheel 81 Spindle motor 82 Second rotating shaft 821

[0031] Grinding wheel cover 83 opening 831 Grinding wheel cover rotating mechanism 84

[0032] Base plate 841 Off-axis motor 842 Driving gear 843

[0033] Driven gear 844 Control module 9 First drive device A1

[0034] First horizontal slide rail A2 Second drive device B1 Second horizontal slide rail B2

[0035] Third drive device C1 Vertical slide rail C2 Foldable shield FS

[0036] Workpiece WP [Specific implementation method]

[0037] In order to facilitate a better understanding of the purpose, structure, characteristics and functions of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific implementation methods.

[0038] like Figures 1 to 9As shown, the gantry grinder 1000 includes a base 1 extending along the X-axis; a carrier 2 on the base 1 that can move along the X-axis and is used to place a workpiece WP; two gantry columns 3 connected to the base 1; a gantry beam 4 connecting the two gantry columns 3, and the gantry beam 4 extends along the Y-axis perpendicular to the X-axis; a slide 5 that can move along the Y-axis is provided on the gantry beam 4; the Z-axis is perpendicular to the X-axis and the Y-axis, a slide 6 is installed on the slide 5 and can move along the Z-axis, the front surface of the slide 6 has a receiving space (not numbered) that is recessed backwards, and a bearing 61 is provided in the receiving space; a rotating motor (not shown) is installed on the rear side of the slide 6, and the rotating motor has a through A first rotating shaft 7 passes through the bearing 61, and the axis R of the first rotating shaft 7 is parallel to the X-axis. A grinding wheel spindle 8 is installed and connected with the first rotating shaft 7 passing through the bearing 61 in front of the slide 6. The grinding wheel spindle 8 includes a grinding wheel 81 and a spindle motor 82. The spindle motor 82 has a second rotating shaft 821. The second rotating shaft 821 drives the grinding wheel 81 to rotate. The first rotating shaft 7 can drive the grinding wheel spindle 8 to rotate as a whole, so that the second rotating shaft 821 of the grinding wheel spindle 8 can rotate and switch between a vertical state parallel to the Z axis and a horizontal state parallel to the Y axis. The grinding wheel 81 can process multiple surfaces to be processed, such as the top surface and each side surface of the workpiece WP. In this embodiment, in order to conveniently explain the purpose of the gantry grinder 1000 described in the utility model, it is assumed that the four side surfaces and the top surface of the workpiece WP, a total of five surfaces, are perpendicular to each other and are all used as surfaces to be processed. However, the utility model does not limit the specific shape of the workpiece WP to be processed and the specific position of the surface to be processed when the gantry grinder 1000 is actually used.

[0039] like Figures 1 to 9 As shown, the grinding wheel spindle 8 can rotate around the axis R of the first rotating shaft 7, and the second rotating shaft 821 can rotate and switch between a vertical state parallel to the Z axis and a horizontal state parallel to the Y axis. When the second rotating shaft 821 is in the vertical state, the grinding wheel spindle 8 is defined to rotate 0 degrees, and the rotation range of the grinding wheel spindle 8 is -90 degrees to +90 degrees. Figures 1 to 5 As shown, the second rotating shaft 821 and the entire grinding wheel spindle 8 are in a horizontal state of +90 degrees; Figures 6 to 9 As shown, the second rotating shaft 821 and the entire grinding wheel spindle 8 are in a vertical state of 0 degrees. Figures 6 to 9 When the second rotating shaft 821 is in a vertical state, the grinding wheel 81 can successively contact the four sides of the workpiece WP by translating along the XYZ axes relative to the workpiece WP, thereby processing the four sides. Figures 2 to 4If the top surface of the workpiece WP is to be processed, the grinding wheel spindle 8 is rotated +90 degrees or -90 degrees to a horizontal state. In the horizontal state, the circumferential surface of the grinding wheel 81 is opposite to the top surface of the workpiece WP, and the circumferential surface of the grinding wheel 81 can contact the top surface of the workpiece WP, thereby realizing the processing of the top surface.

[0040] like Figure 1 and Figure 2 As shown, in this embodiment, the base 1 has a first driving device A1 and a first horizontal slide rail A2 parallel to the X-axis, the carrier 2 is slidably mounted on the first horizontal slide rail A2, and the first driving device A1 drives the carrier 2 to move along the first horizontal slide rail A2. The gantry beam 4 has a second driving device B1 and a second horizontal slide rail B2 parallel to the Y-axis, the slide 5 is slidably mounted on the second horizontal slide rail B2, and the second driving device B1 drives the slide 5 to move along the second horizontal slide rail B2. The slide 5 has a third driving device C1 and a vertical slide rail C2 parallel to the Z-axis, the slide 6 is slidably mounted on the vertical slide rail C2, and the third driving device C1 drives the slide 6 to move relative to the slide 5 along the Z-axis. The first driving device A1, the second driving device B1 and the third driving device C1 are all motors in this embodiment, and other solutions such as hydraulic drive can be selected in other embodiments. The gantry grinder 1000 also includes a plurality of foldable shields FS for covering the first drive device A1, the first horizontal slide rail A2, the second drive device B1 and the second horizontal slide rail B2. Two of the foldable shields FS are installed along the X-axis at both ends of the base 1 and connected to the carrier 2, and extend and retract along the X-axis as the carrier 2 moves. Two of the foldable shields FS are installed along the Y-axis at both ends of the gantry beam 4 and connected to the slide 5, and extend and retract along the Y-axis as the slide 5 moves.

[0041] like Figure 1 and Figure 5As shown, the grinding wheel spindle 8 includes a grinding wheel cover 83 and a grinding wheel cover rotating mechanism 84. The grinding wheel cover 83 covers a portion of the grinding wheel 81, and the grinding wheel cover 83 has an opening 831. The opening 831 is oriented perpendicular to the second rotating shaft 821 so that the circumferential surface of the grinding wheel 81 is exposed. The grinding wheel cover rotating mechanism 84 includes a base plate 841, an eccentric motor 842, a driving gear 843 and a driven gear 844. The eccentric motor 842 is fixed on the side of the base plate 841 facing away from the grinding wheel 81, and the rotating shaft of the eccentric motor 842 passes through the base plate. 841 and the driving gear 843 is connected to the side of the substrate 841 facing the grinding wheel 81, the driving gear 843 is meshed with the driven gear 844, the driven gear 844 is located on the radial outer side of the driving gear 843, the driven gear 844 is sleeved on the second rotating shaft 821 and is located between the substrate 841 and the grinding wheel 81, a part of the grinding wheel cover 83 is inserted between the driven gear 844 and the grinding wheel 81, and the part of the grinding wheel cover 83 is fixed to the driven gear 844 by several screws and rotates with the driven gear 844. In this embodiment, the number of teeth of the driven gear 844 is greater than the number of teeth of the driving gear 843, so that the grinding wheel cover 83 can reduce the speed relative to the eccentric motor 842 and rotate stably.

[0042] like Figure 5 As shown, the slide 5 includes a mounting portion 51 located on the upper side of the gantry beam 4 and a carrying portion 52 located on the front side of the gantry beam 4, the slide seat 6 and the vertical slide rail C2 are arranged on the front side of the carrying portion 52, and the third driving device C1 is installed on the top surface of the carrying portion 52.

[0043] like Figure 1 As shown, the gantry grinder 1000 also has a control cabinet arranged beside the gantry column 3, and a control module 9 is arranged in the control cabinet to control the gantry grinder 1000 to process the five surfaces of the workpiece WP according to a predetermined program.

[0044] like Figure 3As shown, when the gantry grinder 1000 processes the top surface of the workpiece WP, the rotating motor drives the grinding wheel spindle 8 to rotate +90 degrees around the axis R of the first rotating shaft 7 (it can rotate -90 degrees in other embodiments), so that the grinding wheel spindle 8 is in a horizontal state and parallel to the Y axis, and the grinding wheel 81 is located on the right side of the spindle motor 82, and the grinding wheel 81 is perpendicular to the Y axis, so that the circumferential surface of the grinding wheel 81 can face the top surface of the workpiece WP; if the opening 831 of the grinding wheel cover 83 is not facing downward at this time, the eccentric motor 842 is started, and the eccentric motor 842 drives the grinding wheel cover 83 to rotate around the grinding wheel spindle 8, and the opening 831 faces downward; then the slide 6 drives the grinding wheel spindle 8 to rise a certain height along the Z axis, the carrier 2 drives the workpiece WP to move a certain distance along the X axis, and at the same time, the slide 5 drives the grinding wheel spindle 8 to move a certain distance along the Y axis, so that the grinding wheel 81 is located directly above the workpiece WP. At this time, the circumferential surface of the grinding wheel 81 is exposed downward from the opening 831 of the grinding wheel cover 83 and can directly contact the top surface of the workpiece WP.

[0045] like Figure 5 As shown, when the gantry grinder 1000 processes the right side of the workpiece WP, the grinding wheel spindle 8 is in a vertical state and parallel to the Z axis, and the grinding wheel 81 is located below the spindle motor 82, and the grinding wheel 81 is perpendicular to the Z axis, so that the circumferential surface of the grinding wheel 81 can face the right side of the workpiece WP; if the opening 831 of the grinding wheel cover 83 does not face the left side of the right side of the workpiece WP at this time, the eccentric motor 842 is started, and the eccentric motor 842 drives the grinding wheel cover 83 to rotate around the axis until the opening 831 faces the left side of the workpiece WP; then the slide 6 drives the grinding wheel spindle 8 to rise and fall along the Z axis to adjust the height, the carrier 2 drives the workpiece WP to move a certain distance along the X axis, and at the same time, the slide 5 drives the grinding wheel spindle 8 to move a certain distance along the Y axis, so that the grinding wheel 81 is located to the right of the workpiece WP. At this time, the circumferential surface of the grinding wheel 81 is exposed to the left from the opening 831 of the grinding wheel cover 83 and can directly contact the right side surface of the workpiece WP.

[0046] like Figures 7 to 9As shown, when the gantry grinder 1000 processes the front side, left side or rear side of the workpiece WP, the operation process of the gantry grinder 1000 is similar to that of processing the right side of the workpiece WP, the grinding wheel spindle 8 is in a vertical state and parallel to the Z axis, and the grinding wheel 81 is located below the spindle motor 82, and the grinding wheel 81 is perpendicular to the Z axis, so that the circumferential surface of the grinding wheel 81 can face the front side, left side or rear side of the workpiece WP; if the opening 831 of the grinding wheel cover 83 does not face the surface to be processed at this time, the eccentric motor 842 is started, and the eccentric motor 842 drives the grinding wheel cover 83 to rotate around the axis until the opening 831 faces the corresponding surface to be processed; then the grinding wheel 81 is adjusted relative to the workpiece WP along the X axis, Y axis, and Z axis, so that the grinding wheel 81 can face the surface to be processed.

[0047] The gantry grinder of the utility model has the following beneficial effects:

[0048] (1) The grinding wheel spindle 8 is installed on the rotating motor so that the grinding wheel spindle 8 can rotate around the first rotating shaft 7 parallel to the X-axis. The grinding wheel spindle 8 can be transformed from a vertical state parallel to the Z-axis to a horizontal state parallel to the Y-axis, so that the grinding wheel 81 facing the side of the workpiece WP can be rotated to the top surface of the workpiece WP, and the circumferential surface of the grinding wheel 81 can be switched to the top of the workpiece WP to process the top surface of the workpiece WP. It is not necessary to manually flip the workpiece WP or set up an additional grinding wheel spindle 8 to process the top surface of the workpiece WP. In addition, with the grinding wheel 81 moving along the X-axis, Y-axis, and Z-axis relative to the workpiece WP, the gantry grinder 1000 can process the five mutually perpendicular surfaces to be processed of the workpiece WP in succession without flipping the workpiece WP or setting up an additional grinding wheel spindle 8. The rotating motor is moved along the Y axis through the slide 5 and along the Z axis through the slide 6. The positioning is accurate and controllable, and the installation error is small. It can realize precision grinding of multiple surfaces to be processed on large workpieces WP with high processing accuracy requirements such as machine tool guides.

[0049] (2) The grinding wheel 81 rotates from the +90 degree position to the -90 degree position following the grinding wheel spindle 8 to achieve a certain distance of Y-axis displacement, which can reduce the maximum stroke of the slide 5 along the Y-axis, thereby reducing the length of the gantry beam 4, which is beneficial to reducing the footprint of the gantry grinder 1000.

[0050] (3) The eccentric motor 842 drives the grinding wheel cover 83 to rotate in real time following the change of the surface to be processed of the workpiece WP, so that the opening 831 of the grinding wheel cover 83 always faces the processing surface of the workpiece WP, controls the range of debris and dust scattering, and protects the safety of on-site personnel. The grinding wheel cover 83 is indirectly driven by the eccentric motor 842, and the grinding wheel 81 is directly driven by the spindle motor 82. The two rotate independently, that is, the present invention allows the grinding wheel cover 83 to rotate following the change of the processing direction without affecting the processing effect.

[0051] (4) In this embodiment, the number of teeth of the driven gear 844 is greater than the number of teeth of the driving gear 843, so that the grinding wheel cover 83 can be decelerated relative to the eccentric motor 842 and rotate stably.

[0052] (5) The front surface of the slide 6 has a receiving space that is recessed backwards, and a bearing 61 is arranged in the receiving space. The rotating motor is installed on the rear side of the slide 6, and the first rotating shaft 7 passes through the bearing 61 to be installed and fixed with the grinding wheel spindle 8. The design is compact and is also conducive to providing high-strength support for the rotating motor.

[0053] (6) The slide 5 has the mounting portion 51 located on the upper side of the gantry beam 4 , which is beneficial for dispersing the load of the gantry beam 4 and preventing the load from being concentrated on the front side of the gantry beam 4 .

[0054] The above detailed description is only an explanation of the preferred embodiment of the present utility model, and does not limit the patent scope of the present utility model. Therefore, all equivalent technical changes made by using the description and illustrations of the present utility model are included in the patent scope of the present utility model.

Claims

1. A gantry grinder, characterized in that: include: a base extending along the X-axis; A carrier movable along the X-axis on the base; two gantry columns connected to the base; a gantry beam connecting the two gantry columns, the gantry beam extending along the Y-axis perpendicular to the X-axis; a slide movable along the Y-axis is provided on the gantry beam; the slide has a vertical slide rail extending along the Z-axis direction perpendicular to the X-axis and the Y-axis, and a slide seat is slidably mounted on the vertical slide rail and can move relative to the slide along the Z-axis; the slide seat is equipped with a rotating motor, the rotating motor has a first rotating shaft, the axis of the first rotating shaft is parallel to the X-axis, a grinding wheel spindle is connected to the first rotating shaft in front of the slide seat, the grinding wheel spindle includes a grinding wheel and a spindle motor, the spindle motor has a second rotating shaft, the second rotating shaft drives the grinding wheel to rotate, the first rotating shaft can drive the grinding wheel spindle to rotate as a whole, so that the second rotating shaft of the grinding wheel spindle can be rotated and switched between a vertical state parallel to the Z-axis and a horizontal state parallel to the Y-axis, and the grinding wheel can process multiple surfaces to be processed of the workpiece.

2. The gantry grinder according to claim 1, characterized in that: When the second rotating shaft is in a vertical state, the grinding wheel spindle is defined as rotating 0 degrees, and the rotation range of the grinding wheel spindle is from -90 degrees to +90 degrees.

3. The gantry grinder according to claim 1, characterized in that: The grinding wheel spindle also includes a grinding wheel cover and a grinding wheel cover rotating mechanism. The grinding wheel cover covers a portion of the grinding wheel, and the grinding wheel cover has an opening. The direction of the opening is perpendicular to the second rotating axis, so that the circumferential surface of the grinding wheel is exposed. The grinding wheel cover rotating mechanism includes an eccentric motor, and the eccentric motor drives the grinding wheel cover to rotate around the second rotating axis.

4. The gantry grinding machine according to claim 3, characterized in that: The grinding wheel cover rotating mechanism also includes a base plate, a driving gear and a driven gear. The eccentric motor is fixed on the side of the base plate facing away from the grinding wheel. The rotating shaft of the eccentric motor passes through the base plate and is connected to the driving gear on the side of the base plate facing the grinding wheel. The driving gear is meshed with the driven gear. The driven gear is located on the radial outside of the driving gear. The driven gear is sleeved on the second rotating shaft and is located between the base plate and the grinding wheel. The grinding wheel cover is fixed to the driven gear and rotates with the driven gear.

5. The gantry grinding machine according to claim 4, characterized in that: The number of teeth of the driven gear is greater than the number of teeth of the driving gear.

6. The gantry grinding machine according to claim 3, characterized in that: The gantry grinder has a control module, and the eccentric motor is controlled by the control module to automatically run, so that the opening is always facing the surface to be processed that is contacted by the grinding wheel.

7. The gantry grinding machine according to claim 1, characterized in that: The front surface of the slide seat has a receiving space that is recessed backwards, and a bearing is arranged in the receiving space. The rotary motor is installed on the rear side of the slide seat, and the first rotating shaft passes through the bearing to be fixedly installed with the grinding wheel spindle.

8. The gantry grinding machine according to claim 1, characterized in that: The base has a first driving device and a first horizontal slide rail parallel to the X-axis, the carrier is slidably installed on the first horizontal slide rail, the first driving device drives the carrier to move along the first horizontal slide rail, the gantry beam has a second driving device and a second horizontal slide rail parallel to the Y-axis, the slide is slidably installed on the second horizontal slide rail, the second driving device drives the slide to move along the second horizontal slide rail, and a third driving device is installed on the slide to drive the slide to move along the vertical slide rail.

9. The gantry grinding machine according to claim 8, characterized in that: The slide comprises a mounting portion located on the upper side of the gantry beam and a carrying portion located on the front side of the gantry beam, the slide seat and the vertical slide rail are arranged on the front side of the carrying portion, and the third drive device is installed on the top surface of the carrying portion.

10. The gantry grinding machine according to claim 8, characterized in that: The gantry grinder also includes a plurality of foldable shields for covering the first drive device, the first horizontal slide rail, the second drive device and the second horizontal slide rail. Two of the foldable shields are installed at both ends of the base along the X-axis and connected to the carrier, and extend and retract along the X-axis as the carrier moves. Two of the foldable shields are installed at both ends of the gantry beam along the Y-axis and connected to the slide, and extend and retract along the Y-axis as the slide moves.

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