Lifting stone line machine

Abstract

The utility model discloses a kind of lifting type stone line machines, including rack, conveying device, lifting device and polishing device;Conveying device is located on rack, lifting device is connected with the both sides of conveying device, polishing device is located on lifting device, and lifting device drives polishing device to lift;By setting lifting device on conveying device, lifting device drives polishing device to lift, without manual adjustment grinding wheel or conveying device height, reduce the physical burden of operator, reduce artificial operation threshold, can realize more accurate height control, can accurately adapt the polishing demand of different thickness stone.This in addition, lifting device is connected with the both sides of conveying device, and drives polishing device synchronous lifting, can make polishing device more uniform, run more smoothly during lifting process Stress.

Description

Technical Field

[0001] This utility model relates to the field of stone processing technology, and more specifically, to a lifting stone molding machine. Background Technology

[0002] Stone molding machines are specialized machines used to process stone moldings. Their core function is to process raw materials such as marble, granite, and artificial stone into decorative or structural moldings with specific shapes, such as chamfered edges or rounded patterns. Existing stone molding machines are typically equipped with a lifting mechanism to raise or lower the grinding wheel or conveyor device to accommodate stones of different thicknesses. However, to reduce costs, the common height adjustment mechanism for molding machines still relies on manual adjustment. This manual adjustment is not only time-consuming and labor-intensive but also lacks precision, reducing production efficiency. Utility Model Content

[0003] This utility model provides a lifting-type stone molding machine to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: a lifting-type stone molding machine, including a frame, a conveying device, a lifting device, and a polishing device; the conveying device is mounted on the frame, the lifting device is connected to both sides of the conveying device, the polishing device is mounted on the lifting device, and the lifting device drives the polishing device to move up and down; the conveying device is used to convey stone.

[0004] The grinding and polishing device includes a drive motor, a drive pulley, a transmission belt, a driven pulley, a main bearing housing, an outer bearing housing, a rotating shaft, and a grinding wheel. The main bearing housing and the outer bearing housing are respectively connected to the lifting device. The drive motor is mounted on the main bearing housing, and its output shaft is connected to the drive pulley. One end of the rotating shaft is connected to the main bearing housing, and the other end is connected to the outer bearing housing. The driven pulley and the grinding wheel are respectively mounted on the rotating shaft. The drive pulley and the driven pulley are connected by the transmission belt.

[0005] The grinding wheel is positioned opposite to the conveying device and grinds the stone it passes over.

[0006] Preferably, the passive pulley is located between the main bearing housing and the grinding wheel.

[0007] Preferably, both the driving pulley and the driven pulley are pulleys with teeth on their outer surfaces, and the transmission belt is a synchronous belt with teeth on its inner surface; the inner surface of the synchronous belt meshes with the driving pulley and the driven pulley respectively.

[0008] Preferably, the polishing device further includes a front and rear adjustment mechanism, which includes a reduction motor, a dovetail groove, a slide table, an adjusting screw, and an adjusting nut. The slide table is slidably mounted on the dovetail groove, the bottom of which is connected to the lifting device, and the top of which is connected to the main bearing seat. The adjusting nut is connected to the slide table. The adjusting screw is rotatably mounted on the dovetail groove and threadedly connected to the adjusting nut. The reduction motor is located on the outer side of the dovetail groove, and its output end is connected to the adjusting screw. The rotating shaft is slidably connected to the outer bearing seat.

[0009] Preferably, it further includes a belt tensioning device, which includes a tensioning bracket fixed on the main bearing seat and a tensioning wheel provided on the tensioning bracket, the tensioning wheel abutting against the inner side of the transmission belt.

[0010] Preferably, the polishing device is provided with a switch bracket, the switch bracket is provided with a photoelectric switch, the detection end of the photoelectric switch faces the passive pulley, and the passive pulley is provided with a baffle that cooperates with the photoelectric switch; the photoelectric switch is electrically connected to the lifting device.

[0011] Preferably, the lifting device includes a lifting motor, a connecting shaft, and two lifting mechanisms; the two lifting mechanisms are respectively located on both sides of the conveying device, and the two lifting mechanisms are connected by the connecting shaft; the lifting motor is connected to one of the lifting mechanisms; the main bearing seat and the outer bearing seat are respectively located on the two lifting mechanisms.

[0012] Preferably, the lifting mechanism includes a top plate, a bottom plate, a lifting guide sleeve, a pair of lifting guide columns, a lifting screw, and a lifting reducer; the lifting guide sleeve is connected to the conveying device, the pair of lifting guide columns are slidably disposed on the lifting guide sleeve, the top plate is connected to the top of the lifting guide columns; the bottom plate is connected to the bottom of the lifting guide columns; the lifting screw is threadedly connected to the lifting guide sleeve; the lifting reducer is disposed at the bottom of the bottom plate, and the output end of the lifting reducer is connected to the lifting screw and the connecting shaft respectively; the output end of the lifting motor is connected to the input end of the lifting reducer.

[0013] Preferably, the lifting guide sleeve is provided with a distance sensor, and the detection end of the distance sensor is positioned facing the top plate.

[0014] Compared with existing technologies, the advantages of this invention are as follows: By installing a lifting device on the conveying device, which drives the grinding and polishing device to rise and fall, the invention eliminates the need for manual adjustment of the grinding wheel or conveying device height, reducing the physical burden on operators, lowering the barrier to manual operation, and enabling more precise height control. This allows for accurate adaptation to the grinding needs of stones of different thicknesses. Furthermore, the lifting device is connected to both sides of the conveying device and drives the grinding and polishing device to rise and fall synchronously, ensuring more even force distribution and smoother operation during the lifting process. This avoids problems such as skewing and uneven force distribution that can occur with traditional manual adjustments. The structure of this invention is flexible and can quickly adapt to stones of different thicknesses, eliminating the need to replace parts with special components for specific stone thicknesses. This broadens the applicability of the equipment for stone processing and improves its versatility and cost-effectiveness. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the lifting stone molding machine according to an embodiment of the present utility model;

[0016] Figure 2 This is a side view of the lifting stone molding machine according to an embodiment of the present utility model;

[0017] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 4 for Figure 1 Enlarged view of point B in the middle;

[0019] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0020] exist Figures 1 to 5 In the diagram, the correspondence between the component names and the drawing numbers is as follows:

[0021] 1--Frame, 2--Conveying device, 3--Lifting device, 31--Lifting motor, 32--Connecting shaft, 33--Lifting mechanism, 331--Top plate, 332--Bottom plate, 333--Lifting guide sleeve, 334--Lifting guide column, 335--Lifting screw, 336--Lifting reducer, 4--Grinding and polishing device, 41--Drive motor, 42--Drive pulley, 43--Transmission belt, 44--Passive pulley, 45--Main bearing seat, 46--Outer bearing seat, 47--Rotating shaft, 48--Grinding wheel, 49--Front and rear adjustment mechanism, 491--Reduction motor, 492--Dovetail groove, 493--Slide table, 5--Stone material, 6--Switch bracket, 7--Photoelectric switch. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0023] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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 utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Please refer to Figures 1 to 5 This utility model provides a lifting stone molding machine, including a frame 1, a conveying device 2, a lifting device 3, and a polishing device 4; the conveying device 2 is mounted on the frame 1, the lifting device 3 is connected to both sides of the conveying device 2, the polishing device 4 is mounted on the lifting device 3, and the lifting device 3 drives the polishing device 4 to rise and fall; the conveying device 2 is used to convey stone 5; the polishing device 4 includes a drive motor 41, a drive pulley 42, a transmission belt 43, a driven pulley 44, a main bearing seat 45, an outer bearing seat 46, a rotating shaft 47, and a grinding wheel 48; The main bearing housing 45 and the outer bearing housing 46 are respectively connected to the lifting device 3; the drive motor 41 is mounted on the main bearing housing 45, and its output shaft is connected to the drive pulley 42; one end of the rotating shaft 47 is connected to the main bearing housing 45, and the other end is connected to the outer bearing housing 46; the driven pulley 44 and the grinding wheel 48 are respectively mounted on the rotating shaft 47; the drive pulley 42 and the driven pulley 44 are connected by the transmission belt 43; the grinding wheel 48 is arranged opposite to the conveying device 2 and grinds the passing stone 5.

[0026] In this embodiment of the invention, the lifting device 3 is connected to both sides of the conveying device 2. Compared to a single-sided or asymmetrical connection, this avoids problems such as jamming or tilting of the polishing device 4 due to excessive force on one side during lifting. This ensures that the polishing device 4 always remains horizontal, preventing uneven polishing thickness and chipping of the stone 5 edges caused by tilting during lifting. Furthermore, the symmetrical connection on both sides effectively controls the stroke error of the lifting device 3, providing a fundamental guarantee for subsequent polishing accuracy. The conveying device 2 is directly fixed to the frame 1, eliminating the need for frequent movement with height adjustments. This prevents the stone 5 from slipping or deviating due to shaking or displacement of the conveying device 2, allowing the polishing device 4 to accurately align with the surface of the stone 5 to be processed. The conveying device 2 uses a belt conveyor. Furthermore, limiting devices, such as limiting plates or limiting pulleys, are installed on both sides of the conveying device 2 to cooperate with the stone 5. These limiting plates and pulleys act on the sides of the stone 5, ensuring that the stone 5 always travels in a straight line on the conveying device 2.

[0027] Furthermore, the fixed conveyor 2 can be easily connected to the preceding stone material 5 feeding mechanism (such as an automatic feeding platform) and the subsequent finished product collection mechanism. The lifting device 3 can also automatically identify the thickness of the stone material 5 and automatically adjust the polishing height by adding sensors (such as sensors that detect the thickness of the stone material 5), which is highly flexible.

[0028] Compared to the overall lifting structure of the conveying device 2, the lifting device 3 in this embodiment only drives the polishing device 4 to move up and down, without bearing the weight of the conveying device 2 and the stone 5. This results in a lighter load, faster lifting response, and no interference with the conveying process of the stone 5 when adjusting the height. The polishing device 4 is positioned opposite the conveying device 2, specifically above it. Regardless of the thickness of the stone 5 being conveyed, the lifting device 3 only needs to adjust the height of the polishing device 4 to ensure that the polishing head or polishing wheel on the polishing device 4 always remains in contact with the surface of the stone 5 to be processed.

[0029] This embodiment employs a belt drive structure. The drive belt 43 is elastic and can absorb the impact vibration generated when the grinding wheel 48 contacts the stone 5, reducing hard damage to the drive motor 41. When the grinding wheel 48 encounters abnormal resistance (such as impurities in the stone 5 or sudden jamming), the drive belt 43 will slip, cutting off power transmission and preventing the motor from overloading and burning out or the grinding wheel 48 from being damaged. The main bearing seat 45 and the outer bearing seat 46 respectively fix the two ends of the rotating shaft 47, forming a "two-end support" structure, ensuring that the axis of the grinding wheel 48 remains parallel to the feed direction of the stone 5, avoiding problems such as uneven grinding depth and line deformation caused by the shaking of the rotating shaft 47.

[0030] The working process of this embodiment is as follows: First, according to the thickness, line height and other specifications of the stone 5 to be processed, the height of the polishing device 4 is adjusted by the lifting device 3 so that the polishing device 4 and the conveying device 2 form a processing gap suitable for the stone 5, ensuring that the polishing components can accurately act on the surface of the stone 5 to be processed; then, the stone 5 is placed on the conveying device 2, the conveying device 2 is started, and the stone 5 is moved along the set path towards the polishing device 4; next, when the stone 5 is conveyed to the bottom of the polishing device 4, the polishing device 4, which is opposite to the conveying device 2, is started. During the continuous passage of the stone 5, the polishing device 4 grinds and polishes its surface or line contour; finally, the polished stone 5 is continued to be driven by the conveying device 2 and sent out from the processing area, completing the entire processing process.

[0031] During stone processing, the drive motor 41 starts, and its output shaft drives the drive pulley 42 to rotate. The drive pulley 42 drives the driven pulley 44 to rotate synchronously via the transmission belt 43. When the driven pulley 44 rotates, the coaxial shaft 47 rotates accordingly, and the grinding wheel 48 on the shaft 47 rotates at high speed with the shaft 47. When the stone 5 is conveyed to the ground under the grinding wheel 48, the rotating grinding wheel 48 grinds and polishes the surface or lines of the stone 5. The entire process is powered by belt drive, and the double bearing seats ensure the stable operation of the shaft 47. Finally, the stone 5 is processed by the rotation of the grinding wheel 48.

[0032] Preferably, the driven pulley 44 is disposed between the main bearing housing 45 and the grinding wheel 48. This structural arrangement, placing the driven pulley 44 between the main bearing housing 45 and the grinding wheel 48, optimizes the stress on the rotating shaft 47 and reduces the risk of deformation. Traditionally, the driven pulley and grinding wheel are typically located on opposite sides of the motor, with one pulley responsible for transmission and the other for machining. This structure requires a relatively long drive shaft, making it prone to deformation.

[0033] In this embodiment, the passive pulley 44 is a key node for power transmission, while the grinding wheel 48 is subjected to the reaction force of the stone 5 during operation. Both are located on the rotating shaft 47, and the passive pulley 44 is close to the main bearing seat 45, which shortens the distance between the tension of the transmission belt 43 and the main bearing seat 45. This makes the radial force generated by the belt drive closer to the support point, reducing the bending or deflection of the rotating shaft 47 due to cantilever stress. At the same time, the reaction force of the grinding wheel 48 and the belt tension can be more evenly distributed through the double bearing seats (main bearing seat 45 and outer bearing seat 46), avoiding deformation or wear caused by excessive local stress on the rotating shaft 47. In addition, the proximity of the passive pulley 44 to the main bearing seat 45 reduces the impact of its centrifugal force during high-speed rotation on the overall balance of the rotating shaft 47, ensuring smooth operation of the grinding wheel 48.

[0034] Preferably, both the driving pulley 42 and the driven pulley 44 are toothed pulleys on their outer surfaces, and the transmission belt 43 is a synchronous belt with toothed patterns on its inner surface; the inner surface of the synchronous belt meshes with the driving pulley 42 and the driven pulley 44 respectively. In this embodiment, the teeth of the driving pulley and the driven pulley transmit power through meshing with the inner toothed patterns of the synchronous belt, avoiding the "slippage" problem caused by insufficient friction in traditional friction drives.

[0035] Preferably, the polishing device 4 further includes a front and rear adjustment mechanism 49, which includes a reduction motor 491, a dovetail groove 492, a slide 493, an adjusting screw, and an adjusting nut. The slide 493 is slidably disposed on the dovetail groove 492, the bottom of the dovetail groove 492 is connected to the lifting device 3, and the top of the slide 493 is connected to the main bearing seat 45. The adjusting nut is connected to the slide 493. The adjusting screw is rotatably disposed on the dovetail groove 492 and threadedly connected to the adjusting nut. The reduction motor 491 is disposed on the outer side of the dovetail groove 492, and its output end is drivenly connected to the adjusting screw. The rotating shaft 47 is slidably connected to the outer bearing seat 46.

[0036] In this embodiment, the dovetail groove 492 provides rigid guidance for the slide table 493. Its trapezoidal cross-section and large contact area limit the vertical and horizontal offset of the slide table 493 during adjustment, allowing only linear sliding in the forward and backward direction. The top of the slide table 493 is connected to the main bearing seat 45, while the rotating shaft 47 is slidably connected to the outer bearing seat 46. This means that during adjustment, the core components such as the grinding wheel 48, rotating shaft 47, and bearing seat will move synchronously with the slide table 493 as a whole, ensuring that the axial direction of the grinding wheel 48 remains stable (parallel to the conveying direction of the stone 5), preventing the grinding wheel 48 from tilting due to adjustment, and ensuring the flatness of the polished surface. Compared to the traditional manual adjustment method, the structure of the geared motor 491 directly driving the adjusting screw (not shown in the figure, installed in the dovetail groove 492) allows for precise control of the adjustment amount through the electronic control system, eliminating the need for repeated manual trial and error. Especially when switching between different stone 5 specifications, the adjustment speed is faster, reducing downtime.

[0037] During operation, the geared motor 491 starts, and its output drives the adjusting screw to rotate. The adjusting screw and the adjusting nut (not shown in the figure, installed at the bottom of the slide table 493) are engaged by threads, and the rotational motion of the screw is converted into the linear motion of the adjusting nut, which in turn drives the slide table 493 connected to the adjusting nut to slide back and forth along the dovetail groove 492. The top of the slide table 493 is connected to the main bearing seat 45 and moves back and forth synchronously with the slide table 493, thereby driving the main bearing seat 45, the rotating shaft 47 and the grinding wheel 48 to move back and forth as a whole. Through the above linkage, the grinding wheel 48 achieves precise position adjustment in the back and forth direction to adapt to the processing requirements of different stone lines.

[0038] Preferably, the system further includes a belt tensioning device, which comprises a tensioning bracket fixed to the main bearing seat 45 and a tensioning pulley mounted on the tensioning bracket. The tensioning pulley abuts against the inner side of the transmission belt 43. Through this structural arrangement, the abutting action of the tensioning pulley ensures that the belt remains tightly against the surfaces of the driving and driven pulleys, ensuring uniform belt force and eliminating excessive vibration during operation. This reduces the wear rate of the belt itself, lowering the frequency of belt replacement; and prevents additional impact on the bearings of the driving and driven pulleys due to belt vibration, thus extending the service life of the entire transmission system.

[0039] Specifically, the tensioning pulley is kept in stable contact with the inner side of the transmission belt 43 by the tensioning bracket (fixed to the main bearing seat 45). At this time, the tensioning pulley applies radial pressure to the belt to pre-compensate for any slight slack that may exist in the belt and ensure that the initial tension of the belt meets the transmission requirements.

[0040] During equipment operation, if the drive belt 43 becomes loose due to long-term use, thermal expansion and contraction, or material fatigue, the tensioning pulley will continuously apply stable pressure to the belt through its contact with the belt, compensating for the looseness in real time. This ensures that the belt remains tightly against the driving and driven pulleys, preventing slippage and guaranteeing stable power transmission to the grinding wheel 48. A compression spring can be installed on the tensioning bracket to change the contact pressure between the tensioning pulley and the belt, while also buffering instantaneous tension fluctuations during belt operation, preventing excessive tension from damaging the belt or insufficient tension from causing slippage.

[0041] The grinding and polishing device 4 is equipped with a switch bracket 6, and a photoelectric switch 7 is mounted on the switch bracket 6. The detection end of the photoelectric switch 7 faces the passive pulley 44, and the passive pulley 44 has a baffle plate that cooperates with the photoelectric switch 7. The photoelectric switch 7 is electrically connected to the lifting device 3. In this embodiment, the photoelectric switch 7 directly faces the passive pulley 44. By detecting the baffle plate that rotates synchronously with the passive pulley 44, the actual rotation state of the passive pulley 44 can be accurately captured. The photoelectric switch 7 is electrically connected to the lifting device 3. The lifting device 3 receives the signal transmitted from the photoelectric switch 7 and then adjusts the height of the grinding and polishing device 4 to achieve linkage. Therefore, when an abnormal rotation speed of the passive pulley is detected, the photoelectric switch 7 sends a signal to the lifting device 3, and the lifting device 3 finely adjusts the height of the grinding and polishing mechanism. For example, the photoelectric switch 7 reads the rotation speed change of the passive pulley 44. When the rotation speed of the passive pulley 44 is low, it means that the cutting depth is too large, and the grinding wheel 48 needs to be raised; if the rotation speed is high, it means that the grinding is not done or the cutting depth is too small, and the grinding wheel 48 needs to be lowered.

[0042] Preferably, the lifting device 3 includes a lifting motor 31, a connecting shaft 32, and two lifting mechanisms 33; the two lifting mechanisms 33 are respectively located on both sides of the conveying device 2, and the two lifting mechanisms 33 are connected by the connecting shaft 32; the lifting motor 31 is connected by the connecting shaft 32; the main bearing seat 45 and the outer bearing seat 46 are respectively located on the two lifting mechanisms 33.

[0043] In this embodiment, the two lifting mechanisms 33 are connected by a connecting shaft 32 and driven by the same lifting motor 31 (the motor drives one mechanism, which then drives the other synchronously via the connecting shaft 32). This design ensures that the movements of the two lifting mechanisms 33 are completely synchronized, avoiding tilting of the polishing device 4 due to inconsistent lifting speeds and heights on both sides. It also ensures that the axis of the grinding wheel 48 remains parallel to the conveying device 2, thereby guaranteeing the flatness of the polished surface of the stone 5. The two lifting mechanisms 33 are respectively located on both sides of the conveying device 2, and the two core components supporting the polishing device 4, the main bearing seat 45 and the outer bearing seat 46, are respectively installed on the two lifting mechanisms 33, forming a symmetrical load-bearing structure. During processing, the reaction force generated by the contact between the grinding wheel 48 and the stone 5 is transmitted to the two lifting mechanisms 33 through the bearing seats. The symmetrical structure can offset some of the lateral forces, reduce the overall vibration of the equipment, and further ensure operational stability. The single-motor drive not only reduces the equipment manufacturing cost but also avoids synchronization errors caused by parameter differences (such as inconsistent speed and torque) between the two motors, improving reliability from the source. In addition, the lifting mechanisms 33 on both sides are located on both sides of the conveying device 2, and the spacing can be designed according to the width of the stone 5. They can stably support the polishing device 4 with a wider width and meet the processing needs of stone 5 lines of different widths.

[0044] Preferably, the lifting mechanism 33 includes a top plate 331, a bottom plate 332, a lifting guide sleeve 333, a pair of lifting guide columns 334, a lifting screw 335, and a lifting reducer 336; the lifting guide sleeve 333 is connected to the conveying device 2, the pair of lifting guide columns 334 are slidably disposed on the lifting guide sleeve 333, the top plate 331 is connected to the top of the lifting guide columns 334; the bottom plate 332 is connected to the bottom of the lifting guide columns 334; the lifting screw 335 is threadedly connected to the lifting guide sleeve 333; the lifting reducer 336 is disposed at the bottom of the bottom plate 332, and the output end of the lifting reducer 336 is connected to the lifting screw 335 and the connecting shaft 32 respectively; the output end of the lifting motor 31 is connected to the input end of the lifting reducer 336.

[0045] In this embodiment, a pair of lifting guide columns 334 are symmetrically distributed and form a sliding fit with the lifting guide sleeve 333, which can strictly limit the radial displacement of the top plate 331 during the lifting process. The lifting screw 335 is threadedly engaged with the lifting guide sleeve 333, and in conjunction with the power output of the lifting reducer 336, the height adjustment can be achieved at the millimeter or even micrometer level by controlling the number of rotations of the lifting motor 31, precisely matching the processing requirements of stone 5 of different thicknesses. The threaded transmission between the screw and the guide sleeve has a natural self-locking property. After the adjustment stops, even if the weight of the polishing device 4 or the processing reaction force acts on the top plate 331, it will not fall unexpectedly, ensuring the stability of the working position. At the same time, the reducer can convert the speed of the lifting motor 31 into a large torque, easily driving the screw to lift the heavy polishing device 4, avoiding motor overload. The top plate 331 is connected to the top of the lifting guide column 334 and directly supports the main bearing seat 45 or the outer bearing seat 46 of the polishing device 4; the bottom plate 332 is connected to the bottom of the guide column and fixes the lifting reducer 336, forming an upper and lower closed-loop support. The weight of the polishing device 4 is evenly transferred to the base plate 332 and the conveying device 2 through the guide column, reducing component wear.

[0046] During operation, the lifting motor 31 starts, and its output end transmits power to the lifting reducer 336. After reducing speed and increasing torque, the lifting reducer 336 synchronously drives the lifting lead screw 335 and the connecting shaft 32 connected to its output end to rotate. The lifting lead screw 335 forms a threaded engagement with the lifting guide sleeve 333 fixed on the conveying device 2, and the rotational motion of the lead screw is converted into axial linear motion. When the lead screw rotates, it drives the associated base plate 332 (and the lifting reducer 336 on the base plate 332) to move up and down in the vertical direction. The base plate 332 is connected to the bottom of a pair of lifting guide columns 334. When the base plate 332 moves up and down, it drives the lifting guide columns 334 to slide synchronously along the inner hole of the lifting guide sleeve 333. At the same time, the top plate 331 connected to the top of the lifting guide column 334 moves up and down synchronously with the guide column, thereby driving the polishing device 4 (main bearing seat 45 or outer bearing seat 46) installed on the top plate 331 to complete the height adjustment. The connecting shaft 32 connected to the output end of the reducer synchronously drives the lifting screw 335 of the lifting mechanism 33 on the other side to rotate, so that the top plate 331, guide column and other components of the two lifting mechanisms 33 maintain a completely consistent lifting speed and height, ensuring that the grinding and polishing device 4 is raised and lowered horizontally as a whole.

[0047] Preferably, a distance sensor is provided on the lifting guide sleeve 333, with the detection end of the distance sensor facing the top plate 331. Through this structural arrangement, the distance sensor on the lifting guide sleeve 333, with its detection end facing the top plate 331, directly detects the distance between the lifting guide sleeve 333 and the top plate 331. This distance has a linear relationship with the actual lifting height of the lifting mechanism 33, enabling precise height positioning and ensuring processing accuracy.

[0048] Compared with existing technologies, the advantages of this invention are as follows: By installing a lifting device on the conveying device, which drives the grinding and polishing device to rise and fall, the invention eliminates the need for manual adjustment of the grinding wheel or conveying device height, reducing the physical burden on operators, lowering the barrier to manual operation, and enabling more precise height control. This allows for accurate adaptation to the grinding needs of stones of different thicknesses. Furthermore, the lifting device is connected to both sides of the conveying device and drives the grinding and polishing device to rise and fall synchronously, ensuring more even force distribution and smoother operation during the lifting process. This avoids problems such as skewing and uneven force distribution that can occur with traditional manual adjustments. The structure of this invention is flexible and can quickly adapt to stones of different thicknesses, eliminating the need to replace parts with special components for specific stone thicknesses. This broadens the applicability of the equipment for stone processing and improves its versatility and cost-effectiveness.

[0049] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A lifting-type stone molding machine, characterized in that, It includes a frame (1), a conveying device (2), a lifting device (3), and a polishing device (4); the conveying device is located on the frame, the lifting device is connected to both sides of the conveying device, the polishing device is located on the lifting device, and the lifting device drives the polishing device to rise and fall; the conveying device is used to convey stone (5); The grinding and polishing device includes a drive motor (41), a drive pulley (42), a transmission belt (43), a driven pulley (44), a main bearing housing (45), an outer bearing housing (46), a rotating shaft (47), and a grinding wheel (48); the main bearing housing and the outer bearing housing are respectively connected to the lifting device; the drive motor is mounted on the main bearing housing, and its output shaft is connected to the drive pulley; one end of the rotating shaft is connected to the main bearing housing, and the other end is connected to the outer bearing housing; the driven pulley and the grinding wheel are respectively mounted on the rotating shaft; the drive pulley and the driven pulley are connected by the transmission belt. The grinding wheel is positioned opposite to the conveying device and grinds the stone it passes over.

2. The lifting stone molding machine according to claim 1, characterized in that, The passive pulley is located between the main bearing housing and the grinding wheel.

3. The lifting stone molding machine according to claim 2, characterized in that, Both the driving pulley and the driven pulley are pulleys with teeth on their outer surfaces, and the transmission belt is a synchronous belt with teeth on its inner surface; the inner surface of the synchronous belt meshes with the driving pulley and the driven pulley respectively.

4. The lifting stone molding machine according to claim 1, characterized in that, The grinding and polishing device also includes a front and rear adjustment mechanism (49), which includes a reduction motor (491), a dovetail groove (492), a slide table (493), an adjustment screw, and an adjustment nut. The slide table is slidably mounted on the dovetail groove, the bottom of the dovetail groove is connected to the lifting device, and the top of the slide table is connected to the main bearing seat; the adjusting nut is connected to the slide table; the adjusting screw is rotatably mounted on the dovetail groove and threadedly connected to the adjusting nut; the reduction motor is mounted on the outer side of the dovetail groove, and its output end is connected to the adjusting screw; the rotating shaft is slidably connected to the outer bearing seat.

5. The lifting stone molding machine according to claim 1, characterized in that, It also includes a belt tensioning device, which includes a tensioning bracket fixed on the main bearing seat and a tensioning wheel provided on the tensioning bracket, the tensioning wheel abutting against the inner side of the transmission belt.

6. The lifting stone molding machine according to claim 1, characterized in that, The grinding and polishing device is provided with a switch bracket (6), and the switch bracket is provided with a photoelectric switch (7). The detection end of the photoelectric switch faces the passive pulley, and the passive pulley is provided with a baffle that cooperates with the photoelectric switch. The photoelectric switch is electrically connected to the lifting device.

7. The lifting stone molding machine according to any one of claims 1 to 6, characterized in that, The lifting device includes a lifting motor (31), a connecting shaft (32), and two lifting mechanisms (33); the two lifting mechanisms are respectively located on both sides of the conveying device, and the two lifting mechanisms are connected by the connecting shaft. The lifting motor is connected to one of the lifting mechanisms. The main bearing seat and the outer bearing seat are respectively located on the two lifting mechanisms.

8. The lifting stone molding machine according to claim 7, characterized in that, The lifting mechanism includes a top plate (331), a bottom plate (332), a lifting guide sleeve (333), a pair of lifting guide columns (334), a lifting screw (335), and a lifting reducer (336); the lifting guide sleeve is connected to the conveying device, the pair of lifting guide columns are slidably disposed on the lifting guide sleeve, the top plate is connected to the top of the lifting guide columns; the bottom plate is connected to the bottom of the lifting guide columns; the lifting screw is threadedly connected to the lifting guide sleeve; the lifting reducer is disposed at the bottom of the bottom plate, and the output end of the lifting reducer is connected to the lifting screw and the connecting shaft respectively; the output end of the lifting motor is connected to the input end of the lifting reducer.

9. The lifting stone molding machine according to claim 8, characterized in that, The lifting guide sleeve is equipped with a distance sensor, and the detection end of the distance sensor is set towards the top plate.

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