A marble slab trimming device

Abstract

This invention relates to the field of marble slab processing technology and discloses a marble slab fine trimming device, including a slab conveyor. Marble slabs are placed on the conveyor belt of the slab conveyor. A mounting frame is fixedly installed on one side of the slab conveyor. A fixing plate is fixedly installed on the inner side of the mounting frame. An adjustment mechanism is provided on the fixing plate. Four trimming mechanisms are provided inside the adjustment mechanism. The adjustment mechanism includes three sets of first hydraulic cylinders fixedly installed at one end of the mounting frame. A concave-convex plate is fixedly installed at one end of the telescopic rod of the three sets of first hydraulic cylinders. An upper mounting plate is fixedly installed at the upper end of the concave-convex plate. This marble slab fine trimming device, through its overall coordinated use, facilitates the replacement of different grinding wheels and irregularly shaped grinding wheels. It also adapts to the original switching structure, reducing tool costs and operational difficulty, and also achieves multi-functionality, improving equipment versatility and processing efficiency.

Description

Technical Field

[0001] This invention relates to the field of marble slab processing technology, and in particular to a marble slab fine trimming device. Background Technology

[0002] Marble slab finishing is a crucial process for improving dimensional accuracy and appearance quality, widely used in architectural decoration and home renovation. However, as market demands for precision and efficiency in marble slab finishing increase, the shortcomings of existing finishing devices are becoming increasingly apparent, failing to meet actual production needs. Regarding grinding wheel switching, traditional devices often employ disassembly and replacement or sliding rail methods, which are cumbersome and time-consuming. This not only increases the workload of operators but also easily affects finishing accuracy due to positioning deviations during switching, making it difficult to meet the demands of continuous and efficient finishing and severely restricting production efficiency. Furthermore, conventional finishing grinding wheels are mostly of a single, integral structure. When processing single corners of marble slabs, the integral structure of the grinding wheel can easily interfere with non-processed areas of the slab, preventing independent and precise finishing at corners. This leads to problems such as chipping, dimensional deviations, and surface roughness, affecting the overall effect and efficiency of the marble slab finishing process and failing to meet the finishing requirements of high-end marble slabs. Summary of the Invention

[0003] The main objective of this invention is to provide a device for fine trimming marble slabs, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A marble slab trimming device includes a marble slab conveyor with marble slabs placed on its conveyor belt. A mounting frame is fixedly installed on one side of the conveyor, and a fixing plate is fixedly installed on the inner side of the mounting frame. An adjustment mechanism is provided on the fixing plate, and four trimming mechanisms are provided inside the adjustment mechanism. The adjustment mechanism includes three sets of first hydraulic cylinders fixedly installed at one end of the mounting frame. A concave-convex plate is fixedly installed at one end of the telescopic rod of each of the three sets of first hydraulic cylinders. An upper mounting plate is fixedly installed at the upper end of the concave-convex plate, and a lower mounting plate is fixedly installed at the lower end of the concave-convex plate. Four motors are fixedly installed on the upper side of the upper mounting plate, and a connecting rod is fixedly installed at the lower end of the motor's rotating shaft. A first gear is fixedly installed at the lower end of the connecting rod. Movable openings are provided on the inner side of the upper mounting plate corresponding to the positions of the connecting rods. Two sets of sliding sleeves are fixedly installed at the lower end of the lower mounting plate, and sliding rods are slidably installed inside the two sets of sliding sleeves. A second hydraulic cylinder is fixedly installed at the lower end of the lower mounting plate.

[0006] The trimming mechanism includes a bearing seat rotatably mounted on the upper side of the lower mounting plate. A second gear is fixedly mounted on the outer side of the bearing seat. A switching frame is fixedly mounted on the upper end of the bearing seat. The switching frame has four sets of connecting rings that are correspondingly positioned vertically. A shaft is movably mounted on the inner side of each of the four sets of connecting rings. A third gear is fixedly mounted on the outer side of each of the four sets of shafts. An adjustment component is mounted on the outer side of each of the four sets of shafts at the lower end of the third gear. A third hydraulic cylinder is fixedly mounted on the bottom inner side of the switching frame. A connecting plate is fixedly mounted on the upper side of the telescopic rod of the third hydraulic cylinder. Push rods are fixedly mounted on both sides of the connecting plate. Push plates are fixedly mounted on the lower side of the two sets of push rods.

[0007] The first gear is meshed with one of the four sets of third gears, and the four sets of third gears are adapted to the first gear;

[0008] The slide rod is provided with four sets of racks at one end, the second hydraulic cylinder telescopic rod is fixedly connected to the slide rod, and the second gear is meshed with the racks on the slide rod.

[0009] Preferably, the adjustment assembly includes an upper grinding wheel fixedly disposed on the outside of the shaft at the lower end of the third gear, a lower grinding wheel slidably disposed on the outside of the shaft at the lower end of the upper grinding wheel, an annular groove and a retaining groove being formed on the inner side of the lower grinding wheel, a movable cavity being formed on the inner side of the shaft corresponding to the retaining groove, a limiting ring fixedly disposed on the lower side of the shaft, a pull rod movably disposed on the inner side of the shaft, a retaining block fixedly disposed on the upper side of the pull rod, a connecting wheel fixedly disposed at the lower end of the pull rod, and a spring sleeved between the limiting ring on the outside of the shaft and the inner wall of the annular groove.

[0010] Preferably, the concave-convex plate is confined to one end of the marble slab, the upper mounting plate is fitted onto the fixed plate, and the connecting rod passes through the inside of the movable opening.

[0011] Preferably, the bearing seat is fixedly mounted at the center position at the lower end of the switching frame.

[0012] Preferably, the angle between the four sets of shafts is set at 90 degrees, the four sets of adjustment components are arranged from coarse to fine, and the push rod passes through the bottom of the switching frame and connects to the push plate.

[0013] Preferably, the upper and lower grinding wheels are symmetrically arranged, the four sets of upper and lower grinding wheels in the annular groove have different trimming structures, and the limiting ring and the third gear are located between the two corresponding sets of connecting rings.

[0014] Preferably, the pull rod passes through the lower side of the shaft, the locking block passes through the movable cavity and is inserted into the locking slot, and the four sets of connecting wheels are movably connected to the corners of the push plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The first hydraulic cylinder controls the movement of the concave-convex plate, upper mounting plate, and lower mounting plate to a suitable position. The motor is started to drive the connecting rod and the first gear to rotate, which in turn drives the meshing third gear and a set of adjustment components to rotate and perform edge trimming on the side of the marble slabs conveyed by the stone slab conveyor. The four sets of trimming mechanisms installed can perform several sets of fine trimming processes on the conveyed marble slabs from coarse to fine, improving the trimming efficiency. In addition, the second hydraulic cylinder pushes the slide rod to slide along the two sets of sliding sleeves. The sliding sleeves can drive the second gear to achieve switching after a 90-degree rotation and automatic locking after switching.

[0017] 2. When the second gear drives the shaft seat and the switching frame to rotate, the positions of the four sets of adjustment components switch with each other to achieve different trimming structures. Compared with the mechanical arm switching and manual switching, the method of driving the third gear and adjustment components through the meshing of the first gear has more comprehensive advantages, such as compact structure, high efficiency, accurate positioning, stable load, low maintenance cost and lower energy consumption. It is more suitable for continuous and large-scale stone processing production. By using the third hydraulic cylinder, the connecting plate and the two sets of push rods are pulled downward, and the push plate is pushed to move. The push plate will then pull the four sets of connecting wheels to achieve deformation of the four sets of adjustment components.

[0018] 3. After the four sets of connecting wheels are pulled downwards, the pull rod is driven to pull the locking block and the lower half grinding wheel to slide downwards along the movable cavity, so that the lower half grinding wheel is separated from the upper half grinding wheel. At the same time, the spring is squeezed by the lower half grinding wheel. After separation, the lower half grinding wheel does not contact the marble slab. Therefore, during edge trimming, only the upper half grinding wheel is used to process the single corner of the marble slab. There is no need to replace the special-shaped grinding wheel. At the same time, it is compatible with the original switching structure, reducing tool costs and operation difficulty. It can also take into account the multi-purpose use of one machine to improve the versatility of the equipment and processing efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a marble slab edge trimming device according to the present invention;

[0020] Figure 2 This is a partial structural schematic diagram of a marble slab edge trimming device according to the present invention;

[0021] Figure 3 This is a schematic diagram of the adjustment mechanism and the trimming mechanism of a marble slab fine trimming device according to the present invention;

[0022] Figure 4 This is a partially enlarged structural diagram of the adjustment mechanism and the trimming mechanism of the marble slab fine trimming device of the present invention;

[0023] Figure 5This is a schematic diagram of the edge trimming mechanism of a marble slab fine edge trimming device according to the present invention;

[0024] Figure 6 This is a schematic diagram of the lower side structure of the edge trimming mechanism of a marble slab fine edge trimming device according to the present invention;

[0025] Figure 7 This is a partial cross-sectional view of the trimming mechanism of a marble slab trimming device according to the present invention;

[0026] Figure 8 This is a partial cross-sectional view of the adjustment component of the marble slab trimming device of the present invention.

[0027] In the diagram: 1. Stone slab conveyor; 2. Marble slab; 3. Mounting frame; 4. Fixing plate; 5. Adjusting mechanism; 51. First hydraulic cylinder; 52. Concave-convex plate; 53. Upper mounting plate; 54. Lower mounting plate; 55. Motor; 56. Connecting rod; 57. First gear; 58. Movable port; 59. Sliding sleeve; 510. Sliding rod; 511. Second hydraulic cylinder; 6. Trimming mechanism; 61. Shaft seat; 62. Second gear; 63. Marble slab conveyor; 64. Marble slab conveyor; 55. Marble slab conveyor; 66. Marble slab conveyor; 67. Marble slab conveyor; 68. Marble slab conveyor; 59. Sliding sleeve; 510. Sliding rod; 511. Second hydraulic cylinder; 60. Marble slab conveyor; 61. Marble slab conveyor; 62. Marble slab conveyor; 63. Marble slab conveyor; 64. Marble slab conveyor; 65. Marble slab conveyor; 66. Marble slab conveyor; 67. Marble slab conveyor; 68. Marble slab conveyor; 69. Marble slab conveyor ... 3. Switching frame; 64. Connecting ring; 65. Shaft; 66. Third gear; 67. Adjustment assembly; 671. Upper grinding wheel; 672. Lower grinding wheel; 673. Ring groove; 674. Slot; 675. Movable cavity; 676. Limiting ring; 677. Pull rod; 678. Locking block; 679. Connecting wheel; 6710. Spring; 68. Third hydraulic cylinder; 69. Connecting plate; 610. Push rod; 611. Push plate. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] Please see Figures 1-8One embodiment of the present invention provides a marble slab trimming device, comprising a marble slab conveyor 1, on which marble slabs 2 are placed. A mounting frame 3 is fixedly installed on one side of the marble slab conveyor 1. A fixing plate 4 is fixedly installed on the inner side of the mounting frame 3. An adjusting mechanism 5 is provided on the fixing plate 4. Four trimming mechanisms 6 are provided inside the adjusting mechanism 5. The adjusting mechanism 5 includes three sets of first hydraulic cylinders 51 fixedly installed at one end of the mounting frame 3. A concave-convex plate 52 is fixedly installed at one end of the telescopic rod of the three sets of first hydraulic cylinders 51. An upper mounting plate 53 is fixedly installed on the upper end of plate 52, and a lower mounting plate 54 is fixedly installed on the lower end of plate 52. Four sets of motors 55 are fixedly installed on the upper side of the upper mounting plate 53. A connecting rod 56 is fixedly installed on the lower end of the rotating shaft of the motor 55. A first gear 57 is fixedly installed on the lower end of the connecting rod 56. Movable openings 58 are provided on the inner side of the upper mounting plate 53 corresponding to the positions of the connecting rods 56. Two sets of sliding sleeves 59 are fixedly installed on the lower end of the lower mounting plate 54. A sliding rod 510 is slidably installed on the inner side of the two sets of sliding sleeves 59. A second hydraulic cylinder 511 is fixedly installed on the lower end of the lower mounting plate 54.

[0031] The concave-convex plate 52 is confined to one end of the marble slab 2, the upper mounting plate 53 is fitted onto the fixed plate 4, the connecting rod 56 passes through the inner side of the movable opening 58, one end of the slide rod 510 is provided with four sets of racks, and the telescopic rod of the second hydraulic cylinder 511 is fixedly connected to the slide rod 510.

[0032] The first hydraulic cylinder 51 controls the movement of the concave-convex plate 52, upper mounting plate 53, and lower mounting plate 54 to a suitable position. The motor 55 is started to drive the connecting rod 56 and the first gear 57 to rotate, driving the meshing third gear 66 and a set of adjustment components 67 to rotate and perform edge trimming on the side of the marble slab 2 conveyed by the stone slab conveyor 1. The four sets of trimming mechanisms 6 installed can perform several sets of fine trimming processes on the conveyed marble slab 2 from coarse to fine, improving the trimming efficiency. In addition, the second hydraulic cylinder 511 pushes the slide rod 510 to slide along the two sets of sliding sleeves 59. The sliding sleeves 59 can drive the second gear 62 to achieve switching after a 90-degree rotation and automatic locking after switching.

[0033] The trimming mechanism 6 includes a bearing 61 rotatably mounted on the upper side of the lower mounting plate 54. A second gear 62 is fixedly mounted on the outer side of the bearing 61. A switching frame 63 is fixedly mounted on the upper end of the bearing 61. Four sets of connecting rings 64 are provided on the switching frame 63. A shaft 65 is movably mounted on the inner side of each of the four sets of connecting rings 64. A third gear 66 is fixedly mounted on the outer side of each of the four sets of shafts 65. An adjustment component 67 is provided on the outer side of each of the four sets of shafts 65 at the lower end of the third gear 66. A third hydraulic cylinder 68 is fixedly mounted on the bottom inner side of the switching frame 63. A connecting plate 69 is fixedly mounted on the upper side of the telescopic rod of the third hydraulic cylinder 68. Push rods 610 are fixedly mounted on both sides of the connecting plate 69. Push plates 611 are fixedly mounted on the lower side of the two sets of push rods 610.

[0034] The bearing seat 61 is fixedly installed at the center of the lower end of the switching frame 63. The second gear 62 meshes with the rack on the slide bar 510. The angle between the four sets of shafts 65 is set at ninety degrees. The first gear 57 meshes with one of the four sets of third gears 66. All four sets of third gears 66 are adapted to the first gear 57. The four sets of adjustment components 67 are arranged from coarse to fine. The push rod 610 passes through the bottom of the switching frame 63 and is connected to the push plate 611.

[0035] When the second gear 62 drives the shaft seat 61 and the switching frame 63 to rotate, the positions of the four sets of adjustment components 67 switch with each other to achieve the switching of different trimming structures. Compared with the switching of the robotic arm and manual switching, the method of driving the third gear 66 and the adjustment components 67 through the meshing of the first gear 57 has more comprehensive advantages, such as compact structure, high switching efficiency, accurate positioning, stable load, low maintenance cost and lower energy consumption. It is more suitable for continuous and large-scale stone processing production. Through the use of the third hydraulic cylinder 68, the connecting plate 69 and the two sets of push rods 610 are pulled downward, and the push plate 611 is pushed to move. The push plate 611 will then pull the four sets of connecting wheels 679 to achieve the deformation of the four sets of adjustment components 67.

[0036] The adjustment assembly 67 includes an upper grinding wheel 671 fixedly mounted on the outside of the shaft 65 at the lower end of the third gear 66, a lower grinding wheel 672 slidably mounted on the outside of the shaft 65 at the lower end of the upper grinding wheel 671, an annular groove 673 and a slot 674 formed on the inner side of the lower grinding wheel 672, a movable cavity 675 formed on the inner side of the shaft 65 corresponding to the slot 674, a limit ring 676 fixedly mounted on the lower side of the shaft 65, a pull rod 677 movably mounted on the inner side of the shaft 65, a locking block 678 fixedly mounted on the upper side of the pull rod 677, a connecting wheel 679 fixedly mounted on the lower end of the pull rod 677, and a spring 6710 sleeved between the limit ring 676 on the outside of the shaft 65 and the upper inner wall of the annular groove 673.

[0037] The upper grinding wheel 671 and the lower grinding wheel 672 are symmetrically arranged. The four sets of upper grinding wheels 671 and lower grinding wheels 672 in the annular groove 673 have different trimming structures. The limiting ring 676 and the third gear 66 are located between the two sets of corresponding connecting rings 64. The pull rod 677 passes through the lower side of the shaft 65. The locking block 678 passes through the movable cavity 675 and is inserted into the locking slot 674. The four sets of connecting wheels 679 are movably connected to the corners of the push plate 611.

[0038] After the four sets of connecting wheels 679 are pulled downwards, the pull rod 677 is driven to pull the locking block 678 and the lower half grinding wheel 672 to slide downwards along the movable cavity 675, so that the lower half grinding wheel 672 separates from the upper half grinding wheel 671. At the same time, the spring 6710 is squeezed by the lower half grinding wheel 672. After separation, the lower half grinding wheel 672 does not contact the marble slab 2. Therefore, during trimming, only the upper half grinding wheel 671 processes the single corner of the marble slab 2. There is no need to replace the special-shaped grinding wheel. At the same time, it is compatible with the original switching structure, reducing tool costs and operation difficulty. It can also take into account the multi-purpose use of one machine to improve the equipment's versatility and processing efficiency.

[0039] Working Principle: During operation, the first hydraulic cylinder 51 controls the movement of the concave-convex plate 52, upper mounting plate 53, and lower mounting plate 54 to the appropriate positions. The motor 55 then drives the connecting rod 56 and the first gear 57 to rotate, which in turn drives the meshing third gear 66 and a set of adjusting components 67 to rotate, thus trimming the sides of the marble slabs 2 conveyed by the stone slab conveyor 1. The four sets of trimming mechanisms 6 can perform several sets of fine trimming processes on the conveyed marble slabs 2, from coarse to fine, improving trimming efficiency. Additionally, the second hydraulic cylinder 511 pushes the sliding rod 510 to slide along the two sets of sliding sleeves 59. The sliding sleeves 59 drive the second gear 62, enabling switching after a 90-degree rotation and automatic locking after switching. When the second gear 62 drives the shaft seat 61 and the switching frame 63 to rotate, the positions of the four sets of adjusting components 67 switch, allowing for switching between different trimming structures. The switching is achieved by the first gear 57 meshing with and driving the third gear 66 and adjusting components 67 relative to the robotic arm. Compared to manual switching, it offers comprehensive advantages such as compact structure, high switching efficiency, precise positioning, stable load, low maintenance cost, and lower energy consumption, making it more suitable for continuous, large-scale stone processing production. Through the use of the third hydraulic cylinder 68, the connecting plate 69 and two sets of push rods 610 are pulled downwards, simultaneously pushing the push plate 611 to move. The push plate 611 then pulls the four sets of connecting wheels 679, achieving deformation of the four sets of adjustment components 67. After the four sets of connecting wheels 679 are pulled downwards, the pull rod 677 is driven to move simultaneously... When the pull block 678 and the lower half grinding wheel 672 slide downward along the movable cavity 675, the lower half grinding wheel 672 separates from the upper half grinding wheel 671. At the same time, the spring 6710 is squeezed by the lower half grinding wheel 672. After separation, the lower half grinding wheel 672 does not contact the marble slab 2. Therefore, during edge trimming, only the upper half grinding wheel 671 processes the single corner of the marble slab 2. There is no need to replace the irregular grinding wheel. At the same time, it is compatible with the original switching structure, reducing tool costs and operation difficulty. It can also take into account the multi-purpose use of one machine to improve the versatility of the equipment and processing efficiency.

[0040] The electrical connection or control methods of the stone slab conveyor 1, marble slab 2, mounting frame 3, first hydraulic cylinder 51, motor 55, second hydraulic cylinder 511, and third hydraulic cylinder 68 in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate model is selected according to actual use, so they will not be explained in detail.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marble slab trimming device, comprising a slab conveyor (1), characterized in that: Marble slabs (2) are placed on the conveyor belt of the stone slab conveyor (1). A mounting frame (3) is fixedly installed on one side of the stone slab conveyor (1). A fixing plate (4) is fixedly installed on the inner side of the mounting frame (3). An adjustment mechanism (5) is installed on the fixing plate (4). Four sets of trimming mechanisms (6) are installed on the inner side of the adjustment mechanism (5). The adjustment mechanism (5) includes three sets of first hydraulic cylinders (51) fixedly installed at one end of the mounting frame (3). A concave-convex plate (52) is fixedly installed at one end of the telescopic rod of the three sets of first hydraulic cylinders (51). An upper mounting plate (53) is fixedly installed on the upper end of the concave-convex plate (52). A lower mounting plate (54) is fixedly installed at the lower end of the concave-convex plate (52). Four sets of motors (55) are fixedly installed on the upper side of the upper mounting plate (53). A connecting rod (56) is fixedly installed at the lower end of the rotating shaft of the motor (55). A first gear (57) is fixedly installed at the lower end of the connecting rod (56). Movable openings (58) are opened on the inner side of the upper mounting plate (53) corresponding to the position of the connecting rod (56). Two sets of sliding sleeves (59) are fixedly installed at the lower end of the lower mounting plate (54). A sliding rod (510) is slidably installed on the inner side of the two sets of sliding sleeves (59). A second hydraulic cylinder (511) is fixedly installed at the lower end of the lower mounting plate (54). The trimming mechanism (6) includes a bearing seat (61) rotatably mounted on the upper side of the lower mounting plate (54). A second gear (62) is fixedly mounted on the outer side of the bearing seat (61). A switching frame (63) is fixedly mounted on the upper end of the bearing seat (61). Four sets of connecting rings (64) are provided on the switching frame (63) with corresponding upper and lower parts. A shaft rod (65) is movably mounted on the inner side of each of the four sets of connecting rings (64). A third gear (66) is fixedly mounted on the outer side of each of the four sets of shaft rods (65). An adjustment component (67) is provided on the outer side of each of the four sets of shaft rods (65) at the lower end of the third gear (66). A third hydraulic cylinder (68) is fixedly mounted on the bottom inner side of the switching frame (63). A connecting plate (69) is fixedly mounted on the upper side of the telescopic rod of the third hydraulic cylinder (68). Push rods (610) are fixedly mounted on both sides of the connecting plate (69). Push plates (611) are fixedly mounted on the lower side of the two sets of push rods (610). The first gear (57) is meshed with one of the four sets of third gears (66), and all four sets of third gears (66) are adapted to the first gear (57); The slide rod (510) is provided with four sets of racks at one end. The telescopic rod of the second hydraulic cylinder (511) is fixedly connected to the slide rod (510). The second gear (62) is engaged with the rack on the slide rod (510).

2. The marble slab trimming device according to claim 1, characterized in that: The adjustment assembly (67) includes an upper grinding wheel (671) fixedly disposed on the outside of the shaft (65) at the lower end of the third gear (66), and a lower grinding wheel (672) slidably disposed on the outside of the shaft (65) at the lower end of the upper grinding wheel (671). An annular groove (673) is formed on the inner side of the lower grinding wheel (672), and a retaining groove (674) is formed on the inner side of the lower grinding wheel (672). The inner side of the shaft (65) corresponds to the retaining groove (674). A movable cavity (675) is provided at the position. A limiting ring (676) is fixedly provided on the lower side of the shaft (65). A pull rod (677) is movably provided on the inner side of the shaft (65). A locking block (678) is fixedly provided on the upper side of the pull rod (677). A connecting wheel (679) is fixedly provided at the lower end of the pull rod (677). A spring (6710) is sleeved between the limiting ring (676) on the outer side of the shaft (65) and the inner wall of the upper side of the ring groove (673).

3. The marble slab trimming device according to claim 1, characterized in that: The concave-convex plate (52) is confined to one end of the marble slab (2), the upper mounting plate (53) is fitted onto the fixed plate (4), and the connecting rod (56) passes through the inside of the movable opening (58).

4. The marble slab trimming device according to claim 1, characterized in that: The bearing seat (61) is fixedly installed at the center of the lower end of the switching frame (63).

5. The marble slab trimming device according to claim 1, characterized in that: The angle between the four sets of shafts (65) is set at 90 degrees, the four sets of adjustment components (67) are arranged from thick to thin, and the push rod (610) passes through the bottom of the switching frame (63) and is connected to the push plate (611).

6. The marble slab trimming device according to claim 2, characterized in that: The upper grinding wheel (671) and the lower grinding wheel (672) are symmetrically arranged. The four sets of upper grinding wheels (671) and lower grinding wheels (672) in the annular groove (673) have different trimming structures. The limiting ring (676) and the third gear (66) are located between the two sets of corresponding connecting rings (64).

7. The marble slab trimming device according to claim 2, characterized in that: The pull rod (677) passes through the underside of the shaft (65), the locking block (678) passes through the movable cavity (675) and is inserted into the locking slot (674), and the four sets of connecting wheels (679) are movably connected to the corners of the push plate (611).

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