Environment-friendly grinding machine

Abstract

The utility model is suitable for the technical field of polishing equipment, and provides an environment-friendly polishing machine which comprises a workbench fixedly provided with a plurality of supporting legs. The lifting table is embedded into the working table and is in sliding connection with the working table; the multiple first telescopic rods are fixedly installed at the bottom of the workbench, and output rods of the multiple first telescopic rods are fixedly connected with the lifting table; the movable groove is formed in the working table; the plurality of rollers are rotationally mounted in the movable groove and are used for assisting the movement of the stones; and the protective cover is fixedly installed on the workbench, and a feeding port is formed in the side, corresponding to the multiple rolling wheels, of the protective cover. According to the environment-friendly grinding machine, workers can be assisted in moving stone to the position corresponding to the grinding mechanism, physical output of the workers can be reduced, and meanwhile the grinding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the polishing equipment technical field, especially, relate to an environmental protection polisher. BACKGROUND

[0002] In order to let the object surface such as stone become more delicate and beautiful, have more use way, people will use polisher in many cases, electric polisher full name reciprocating electric polishing polisher (also known as file grinder), is widely used in mold industry's finishing and surface polishing treatment, is a kind of similar pneumatic product's alternative.

[0003] The existing polisher needs to place the stone on the workbench first when in use, and then control the polisher to polish the protrusions on the surface of the stone, since the weight of the stone is large, it is usually difficult to move, which consumes a lot of labor of the worker and affects the overall polishing efficiency. UTILITY MODEL CONTENTS

[0004] The utility model provides an environmental protection polisher, to solve the problem of the workman of the polisher currently used manually moves stone to corresponding position and polishes, improves the work difficulty of the workman and reduces the polishing efficiency.

[0005] To solve the above problems, the utility model is realized in this way, an environmental protection polisher, comprising: a workbench fixedly installed with a plurality of supporting legs; a lifting table, the lifting table is embedded in the workbench and is in sliding connection with the workbench; a plurality of first telescopic rods, the plurality of first telescopic rods are all fixedly installed at the bottom of the workbench, and the output rods of the plurality of first telescopic rods are all in fixed connection with the lifting table; a movable slot, the movable slot is formed in the workbench; a plurality of rollers, the plurality of rollers are rotatably installed in the movable slot and are used to assist the movement of the stone; a protective cover, the protective cover is fixedly installed on the workbench, and a feeding port is formed in one side of the protective cover corresponding to the plurality of rollers; a feeding auxiliary mechanism, the feeding auxiliary mechanism is arranged on the workbench and is used to transfer the stone to the lifting table on the workbench; a polishing mechanism, the polishing mechanism is arranged on the protective cover and is used to polish the stone on the lifting table.

[0006] Preferably, the feeding auxiliary mechanism comprises two movable plates, a plurality of rollers and two second telescopic rods, the two movable plates are all hingedly connected in the movable slot, the plurality of rollers are all rotatably installed between the two movable plates and are evenly distributed, and the output rods of the two second telescopic rods are respectively hingedly connected with the two movable plates.

[0007] Preferably, the polishing mechanism comprises a rotating motor, a connecting rod, a hydraulic cylinder, a mounting cover, four fixed shafts, four mounting grooves, four polishing pieces and two driving mechanisms, the rotating motor is fixedly installed on the protective cover, the connecting rod is rotatably installed on the protective cover and extends into the protective cover, one end of the connecting rod is fixedly connected with the output shaft of the rotating motor, the hydraulic cylinder is fixedly installed on the connecting rod, the mounting cover is fixedly installed on the output rod of the hydraulic cylinder, the four fixed shafts are rotatably installed in the mounting cover, the four mounting grooves are respectively formed in the four fixed shafts, the four polishing pieces are respectively embedded in the four mounting grooves, and the two driving mechanisms are arranged on the mounting cover and used for driving the four polishing pieces to rotate and polish the stone.

[0008] Preferably, the driving mechanism comprises a driving motor, two fixed gears and a transmission belt, the driving motor is fixedly installed on the mounting cover, the output shaft of the driving motor is fixedly connected with any fixed shaft, the two fixed gears are respectively fixedly installed on two adjacent fixed shafts, and the transmission belt is sleeved on the two fixed gears.

[0009] Preferably, the connecting rod is arranged in a "Z" shape, and the hydraulic cylinder and the output shaft of the rotating motor are respectively fixedly installed on two ends of the connecting rod arranged in parallel.

[0010] Preferably, two limiting mechanisms are arranged on the four fixed shafts and used for fixing the polishing pieces and the fixed shafts, the limiting mechanism comprises a plurality of clamping grooves, a receiving groove, an operating rod, a clamping block and a spring, the plurality of clamping grooves are formed on the central shaft of the polishing piece embedded in the mounting groove, the receiving groove is formed on the fixed shaft, the operating rod is slidably installed on the side surface of the fixed shaft and extends into the receiving groove, the clamping block is fixedly installed on one end of the operating rod extending into the receiving groove, the clamping block is slidably embedded in any clamping groove, and the spring is sleeved on the operating rod and fixedly installed between the clamping block and the inner wall of the receiving groove.

[0011] Preferably, a sliding groove is formed on the lifting platform, a bidirectional screw rod is rotatably installed in the sliding groove, two clamping blocks are threadedly installed on the bidirectional screw rod, the two clamping blocks are slidably installed in the sliding groove, an adjusting motor is fixedly installed on the side surface of the lifting platform, and the output shaft of the adjusting motor is fixedly connected with the bidirectional screw rod.

[0012] Compared with the related art, the environmental protection polishing machine has the following beneficial effects:

[0013] Compared with the prior art, the environmental protection polisher provided by the scheme significantly improves the automation degree and efficiency of stone polishing by integrating the lifting platform, the roller, the feeding auxiliary mechanism and the efficient polishing mechanism. The design of the lifting platform reduces the physical consumption of workers manually moving the stone, and the roller and the feeding auxiliary mechanism further simplify the feeding process of the stone, so that the whole polishing operation is more smooth and efficient. At the same time, the polishing mechanism adopts the combination of the rotary motor, the hydraulic cylinder, the fixed shaft, the polishing piece and the driving motor, realizes the comprehensive, uniform and efficient polishing of the stone, improves the polishing quality and precision. In addition, the device also pays attention to safety and environmental protection, reduces the dust and noise generated in the polishing process through the design of the protective cover, protects the health of workers and reduces environmental pollution. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a main view structural schematic diagram of an environmental protection polisher provided by the utility model;

[0015] Figure 2 is a main view structural schematic diagram of an environmental protection polisher provided by the utility model;

[0016] Figure 3 is Figure 2 is an enlarged structural schematic diagram of part A shown in the figure;

[0017] Figure 4 is Figure 3 is an enlarged structural schematic diagram of part B shown in the figure.

[0018] Significant: 1, workbench; 2, lifting platform; 3, first telescopic rod; 4, movable groove; 5, roller; 6, protective cover; 7, movable plate; 8, roller shaft; 9, second telescopic rod; 10, rotary motor; 11, connecting rod; 12, hydraulic cylinder; 13, mounting cover; 14, fixed shaft; 15, mounting groove; 16, polishing piece; 17, driving motor; 18, fixed gear; 19, transmission belt; 20, clamping groove; 21, storage groove; 22, operating rod; 23, clamping block; 24, spring; 25, bidirectional screw rod; 26, clamping block; 27, adjusting motor. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application; the application description and the claims herein and the above description of drawings herein utilize terms such as "include" and "have" and their derivatives, which are intended to cover a non-exclusive inclusion; the terms "first", "second", and the like used in the application description and the claims herein and the above description of drawings herein are used to distinguish between similar objects and are not necessarily used to describe a particular sequential order; the terms "inner", "outer", "left", "right", and the like used in the application description and the claims herein and the above description of drawings herein indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0020] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, nor is it necessarily referring to a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0021] The embodiment of the utility model provides a kind of environmental protection polisher, as shown in Figures 1-4 The environmental protection polisher includes: a plurality of support legs are fixedly installed on the workbench 1;Lifting platform 2, the lifting platform 2 is embedded in the workbench 1, and is slidably connected with workbench 1;A plurality of first telescopic rods 3, a plurality of the first telescopic rods 3 are fixedly installed on the bottom of the workbench 1, and the output rod of a plurality of the first telescopic rods 3 is fixedly connected with the lifting platform 2;Movable groove 4, the movable groove 4 is set on the workbench 1;A plurality of rollers 5, a plurality of the rollers 5 are rotatably installed in the movable groove 4, for assisting the movement of stone;Protective cover 6, the protective cover 6 is fixedly installed on the workbench 1, and a side corresponding to a plurality of the rollers 5 is provided with a feeding port on the protective cover 6;Feeding auxiliary mechanism, the feeding auxiliary mechanism is arranged on the workbench 1, for transferring stone to the lifting platform 2 on the workbench 1;Polishing mechanism, the polishing mechanism is arranged on the protective cover 6, for polishing stone on the lifting platform 2.

[0022] In this embodiment, the workbench 1 serves as the basic support structure of the entire grinding machine, providing a stable platform to ensure the stability of the grinding process. The lifting platform 2 is used to carry the stone and adjust the height of the stone through lifting action, facilitating grinding and reducing the physical exertion of workers moving the stone, improving the grinding efficiency. The first telescopic rod 3 controls the lifting of the lifting platform through telescopic action, realizing the automatic lifting of the lifting platform and improving the convenience of operation and the flexibility of grinding. The movable slot 4 provides space for the installation of the roller, thereby assisting the movement of the stone. The roller 5 is used to assist the movement of the stone on the workbench, greatly reducing the physical burden of workers moving the stone and improving the grinding efficiency. The protective cover 6 is used to protect the workers during the grinding process, reduce the dust and noise generated during grinding, improve the safety of the grinding process, and reduce environmental pollution. The feeding port is used to transfer the stone from the outside to the lifting platform 2 on the workbench 1, simplifying the feeding process of the stone and improving the convenience of operation. The feeding auxiliary mechanism further simplifies the feeding process of the stone and improves the grinding efficiency. The grinding mechanism realizes the automatic grinding of the stone, improving the accuracy and efficiency of grinding.

[0023] In further preferred embodiments of the present application, the feeding auxiliary mechanism includes two movable plates 7, a plurality of rollers 8 and two second telescopic rods 9. The two movable plates 7 are hingedly connected in the movable slot 4. The plurality of rollers 8 are rotatably installed between the two movable plates 7 and are evenly distributed. The two second telescopic rods 9 are respectively hingedly connected to the corresponding two supporting legs at the bottom of the workbench 1. The output rods of the two second telescopic rods 9 are respectively hingedly connected to the two movable plates 7.

[0024] In this embodiment, the movable plate 7 can be flipped or swung relative to the movable slot 4, so that the stone can be more easily guided onto the lifting platform 2 from the outside. At the same time, when not in use, the movable plate 7 can be flipped or swung to a position that does not affect other operations, improving the flexibility of the device. The design of the roller 8 further simplifies the movement of the stone, reduces the friction resistance, so that the stone can roll more smoothly from the movable plate 7 to the lifting platform 2, improving the efficiency of feeding. At the same time, since the two movable plates 7 are fixedly installed with a baffle, the baffle is arranged at one end close to the ground, which can prevent the stone from sliding off the roller 8 and causing damage to the stone. The telescopic action of the second telescopic rod 9 can control the flipping or swinging of the movable plate 7, thereby adjusting the angle between the movable plate 7 and the lifting platform 2, so that the stone can be more smoothly guided onto the lifting platform 2. This design not only improves the efficiency of feeding, but also increases the degree of automation of the device.

[0025] The further preferred embodiment of the utility model discloses, the polishing mechanism includes rotating electrical machine 10, connecting rod 11, hydraulic cylinder 12, installation cover 13, four fixed shafts 14, four installation grooves 15 and four polishing pieces 16 and two drive mechanisms, rotating electrical machine 10 is fixedly installed on the protective cover 6, connecting rod 11 is rotatably installed on the protective cover 6, and it extends to the protective cover 6, one end of connecting rod 11 is fixedly connected with the output shaft of rotating electrical machine 10, hydraulic cylinder 12 is fixedly installed on connecting rod 11, installation cover 13 is fixedly installed on the output rod of hydraulic cylinder 12, four fixed shafts 14 are rotatably installed in installation cover 13, four installation grooves 15 are set up on four fixed shafts 14 respectively, four polishing pieces 16 are embedded in four installation grooves 15 respectively, two drive mechanisms are all set up on installation cover 13, and are used to drive four polishing pieces 16 to rotate and polish stone.

[0026] In the embodiment, rotating electrical machine 10 is used as the power source of the polishing mechanism, and through the driving of rotating electrical machine 10, connecting rod 11 and the subsequent polishing assembly can be driven to rotate, so that the polishing work on the stone can be realized. Connecting rod 11 plays a role in transmitting the power of rotating electrical machine 10, and converts the rotary motion of the motor into the rotary motion of the polishing mechanism. The extension and retraction of hydraulic cylinder 12 can adjust the height of installation cover 13 and the polishing pieces 16 thereon, so that the polishing work on the stone of different thicknesses can be realized. This design increases the flexibility of the polishing mechanism and improves the applicability of the equipment. Installation cover 13 is used as the mounting and supporting structure of polishing pieces 16, so that polishing pieces 16 can perform the polishing work more stably. Meanwhile, installation cover 13 can also play a role in protecting polishing pieces 16 and the safety of workers. The design of fixed shaft 14 makes polishing pieces 16 rotate around it, so that the overall polishing work on the stone can be realized. The design of installation groove 15 makes polishing pieces 16 more convenient to install and disassemble, and facilitates the replacement of polishing pieces of different specifications or wear. Polishing pieces 16 are used as the components directly polishing the stone, so that the surface of the stone can be polished finely, and the precision and quality of the polishing work are improved. The design of the drive mechanism makes polishing pieces 16 perform the polishing work more efficiently, and improves the polishing efficiency and quality. Meanwhile, the design of the two drive mechanisms can also realize the synchronous rotation of polishing pieces 16, so that the uniformity of the polishing effect is ensured.

[0027] In the further preferred embodiment of the utility model, the drive mechanism includes a drive motor 17, two fixed gears 18 and a transmission belt 19, the drive motor 17 is fixedly installed on the installation cover 13, the output shaft of the drive motor 17 is fixedly connected with any fixed shaft 14, two fixed gears 18 are fixedly installed on two adjacent fixed shafts 14 respectively, and the transmission belt 19 is sleeved on the two fixed gears 18.

[0028] In this embodiment, the driving motor 17 serves as the power source of the driving mechanism, and the rotational movement of the driving motor 17 can drive the fixed shaft 14 and the polishing pieces 16 thereon to rotate, thereby realizing the polishing operation on the stone. At the same time, since the driving motor 17 is fixedly installed on the mounting cover 13, the stable transmission of power during polishing can be ensured. The design of the fixed gear 18 enables the adjacent fixed shafts 14 to be connected through the transmission belt 19, thereby realizing the transmission of power. This design can ensure that multiple polishing pieces 16 can rotate synchronously, ensuring the uniformity and quality of the polishing effect. The design of the transmission belt 19 enables the power of the driving motor 17 to be efficiently transmitted to the adjacent fixed shafts 14, thereby driving multiple polishing pieces 16 to rotate synchronously. This design not only improves the polishing efficiency, but also ensures the stability of the polishing quality.

[0029] In a further preferred embodiment of the utility model, the connecting rod 11 is arranged in a "Z" shape, and the output shaft of the hydraulic cylinder 12 and the rotary motor 10 are fixedly installed at the two ends of the connecting rod 11 arranged in parallel.

[0030] In this embodiment, the connecting rod 11 is designed in a "Z" shape, which enables the connecting rod 11 to realize more functions in a limited space. The "Z" shaped connecting rod 11 can make more effective use of space, especially in the case of limited internal space of the device, this design can ensure that the rotary motor 10, the hydraulic cylinder 12 and the mounting cover 13 and other components can be compactly installed together, thereby reducing the volume of the entire device. By adjusting the angle and length of the "Z" shape, the rigidity and stability of the connecting rod 11 can be optimized, ensuring that the power of the rotary motor 10 can be stably transmitted during polishing, while supporting the weight of the hydraulic cylinder 12 and the mounting cover 13. The "Z" shaped arrangement makes the center points of the two ends of the connecting rod 11 different, similar to the action of an eccentric wheel, thereby expanding the polishing range of the polishing mechanism, which is conducive to ensuring the polishing effect.

[0031] The further preferred embodiment of the utility model discloses four fixing shafts 14 are all provided with two limiting mechanisms, be used for fixing the polishing piece 16 with the fixed axle 14, the limiting mechanism includes a plurality of clamping slots 20, the storage groove 21, the operating lever 22, the clamping block 23 and the spring 24, a plurality of clamping slots 20 all are set up on the central shaft in the polishing piece 16 embedding installation groove 15, the storage groove 21 is set up on the fixed axle 14, the operating lever 22 sliding installation is in the side of fixed axle 14, and extend to the storage groove 21, the clamping block 23 fixed installation is in the operating lever 22 extends to the one end of storage groove 21, the clamping block 23 sliding embedding is in any clamping slot 20, the spring 24 is set on the operating lever 22, and fixed installation is between the clamping block 23 with the inner wall of storage groove 21.

[0032] In the embodiment, the limiting mechanism ensures the stability and firmness of the polishing piece 16 in the installation groove 15, prevents the polishing piece 16 from falling off or loosening due to vibration or external force during polishing. At the same time, the limiting mechanism also makes the replacement of the polishing piece 16 more simple and fast, improves the maintenance efficiency and operability of the equipment. The design of the clamping slot 20 provides an embedding point for the clamping block 23, so that the clamping block 23 can be firmly clamped on the central shaft of the polishing piece 16, thereby realizing the fixation of the polishing piece 16. This design not only improves the stability of the fixation, but also ensures the positioning accuracy of the polishing piece 16 during installation. The design of the storage groove 21 provides sufficient space for the operating lever 22 and the clamping block 23, so that they can smoothly move and embed into the clamping slot 20 when needed. At the same time, the storage groove 21 also plays a protective role for the operating lever 22 and the clamping block 23, preventing them from being damaged due to external force. The design of the operating lever 22 allows users to control the embedding and disengagement of the clamping block 23 in the clamping slot 20 by pulling or pushing it, which not only improves the convenience of operation, but also ensures the safety of users when replacing the polishing piece 16. The design of the clamping block 23 is the core component of the limiting mechanism, which realizes the fixation of the polishing piece 16 by cooperating with the clamping slot 20, preventing the polishing piece 16 from falling off or loosening. The design of the spring 24 provides elastic support for the clamping block 23, so that the clamping block 23 can maintain a certain pressure after embedding in the clamping slot 20, thereby improving the stability of the fixation. At the same time, the spring 24 also allows the operating lever 22 to move more smoothly when pulled or pushed, improving the convenience of operation.

[0033] In the further preferred embodiment of the utility model, a sliding groove is formed on the lifting platform 2, a bidirectional screw 25 is rotatably installed in the sliding groove, two clamping blocks 26 are threadedly installed on the bidirectional screw 25, the two clamping blocks 26 are slidingly installed in the sliding groove, an adjusting motor 27 is fixedly installed on the side surface of the lifting platform 2, and the output shaft of the adjusting motor 27 is fixedly connected with the bidirectional screw 25.

[0034] In this embodiment, the sliding groove provides a track for the sliding of the clamping blocks 26, which can slide smoothly inside it, thus achieving clamping of stone materials of different sizes. At the same time, the sliding groove also plays a role in positioning and guiding, ensuring the stability and accuracy of the clamping blocks 26 during movement. The design of the bidirectional screw 25 is the core component of the clamping mechanism, which achieves synchronous movement of the clamping blocks 26 through thread cooperation with the clamping blocks 26. When the bidirectional screw 25 rotates, the two clamping blocks 26 will move simultaneously in opposite or the same direction, thus achieving clamping or loosening of the stone material. This design not only improves the stability and efficiency of clamping, but also makes the clamping force more uniform, avoiding damage or falling of the stone material due to excessive or insufficient clamping force. The design of the clamping block 26 is the direct execution component of the clamping mechanism, which generates friction force through the contact surface with the stone material, firmly clamping the stone material on the lifting platform 2, improving the applicability and flexibility of the equipment. The design of the adjusting motor 27 provides a power source for the rotation of the bidirectional screw 25. By controlling the start and stop of the adjusting motor 27, as well as adjusting its speed and direction, precise control of the movement speed and direction of the clamping block 26 can be achieved. This design not only improves the degree of automation of the equipment, but also reduces the difficulty and labor intensity of operation.

[0035] In summary, compared with related technologies, the environmental protection polisher significantly improves the automation degree and efficiency of stone polishing by integrating the lifting platform, roller, feeding auxiliary mechanism, and efficient polishing mechanism. The design of the lifting platform reduces the physical consumption of workers manually moving the stone material, and the roller and feeding auxiliary mechanism further simplify the feeding process of the stone material, making the entire polishing operation more smooth and efficient. At the same time, the polishing mechanism adopts a combination of rotary motors, hydraulic cylinders, fixed shafts, polishing pieces, and drive motors, achieving comprehensive, uniform, and efficient polishing of the stone material, improving polishing quality and precision. In addition, the device also focuses on safety and environmental protection, reducing dust and noise generated during polishing through the design of the protective cover, protecting the health of workers and reducing environmental pollution.

[0036] In several embodiments provided in the present application, it should be understood that the disclosed device can be implemented in other ways.

[0037] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Obviously, the described examples are only some of the embodiments of the present application, not all the embodiments. Based on these examples, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above examples, those of ordinary skill in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also fall within the scope of the present application.

Claims

1. An environmentally friendly sander characterized by, The utility model relates to a kind of stone polishing machine, including: Workbench with multiple support legs fixedly installed; Lifting platform embedded in the workbench and slidingly connected with workbench; Multiple first telescopic rods, the output rod of multiple first telescopic rods is fixedly connected with lifting platform; Movable slot, the movable slot is opened in the workbench; Multiple rollers, multiple rollers are rotatably installed in the movable slot, for assisting the movement of stone; Protective cover, the protective cover is fixedly installed on the workbench, and the side corresponding to multiple rollers is provided with feeding port on the protective cover; Feeding auxiliary mechanism, the feeding auxiliary mechanism is arranged on the workbench, for transferring stone to lifting platform on workbench; Polishing mechanism, the polishing mechanism is arranged on the protective cover, for polishing stone on lifting platform.

2. The environmentally friendly sander of claim 1, wherein, The feeding auxiliary mechanism includes two movable plates, multiple rollers and two second telescopic rods, two movable plates are hingedly connected in the movable slot, multiple rollers are rotatably installed between two movable plates and are evenly distributed, two second telescopic rods are respectively hingedly connected on the bottom of two support legs of the workbench, and the output rod of two second telescopic rods is respectively hingedly connected with two movable plates.

3. The environmentally friendly sander of claim 1, wherein, The polishing mechanism includes a rotary motor, a connecting rod, a hydraulic cylinder, a mounting cover, four fixed shafts, four mounting grooves, four polishing pieces and two drive mechanisms, the rotary motor is fixedly installed on the protective cover, the connecting rod is rotatably installed on the protective cover and extends into the protective cover, one end of the connecting rod is fixedly connected with the output shaft of the rotary motor, the hydraulic cylinder is fixedly installed on the connecting rod, the mounting cover is fixedly installed on the output rod of the hydraulic cylinder, four fixed shafts are rotatably installed in the mounting cover, four mounting grooves are respectively formed in four fixed shafts, four polishing pieces are respectively embedded in four mounting grooves, two drive mechanisms are arranged on the mounting cover to drive four polishing pieces to rotate and polish stone.

4. The environmentally friendly sander of claim 3, wherein, The drive mechanism includes a drive motor, two fixed gears and a transmission belt, the drive motor is fixedly installed on the mounting cover, the output shaft of the drive motor is fixedly connected with any fixed shaft, two fixed gears are respectively fixedly installed on two adjacent fixed shafts, and the transmission belt is sleeved on two fixed gears.

5. The environmentally friendly sander of claim 3, wherein, The connecting rod is arranged in "Z" shape, and the output shaft of the rotary motor and the hydraulic cylinder are respectively fixedly installed on two ends of the connecting rod arranged in parallel.

6. The environmentally friendly sander of claim 4, wherein, Four said fixed shafts are provided with two limiting mechanisms, for fixing the polishing sheet with the fixed shaft, the limiting mechanism comprises a plurality of clamping grooves, receiving grooves, operating rods, clamping blocks and springs, a plurality of said clamping grooves are opened on the center shaft embedded in the polishing sheet installation groove, the receiving groove is opened on the fixed shaft, the operating rod is slidingly installed on the side of the fixed shaft and extends into the receiving groove, the clamping block is fixedly installed on one end of the operating rod extending into the receiving groove, the clamping block is slidingly embedded in any clamping groove, the spring is sleeved on the operating rod and is fixedly installed between the clamping block and the inner wall of the receiving groove.

7. The environmentally friendly sander of claim 1, wherein, The lifting platform is provided with a sliding groove, a bidirectional screw rod is rotatably installed in the sliding groove, two clamping blocks are threadedly installed on the bidirectional screw rod, the two clamping blocks are slidingly installed in the sliding groove, an adjusting motor is fixedly installed on the side of the lifting platform, and the output shaft of the adjusting motor is fixedly connected with the bidirectional screw rod.

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