A variable spacing gang saw

Abstract

The application discloses a variable-spacing gang saw and relates to the technical field of stone plate cutting, and aims to solve the technical problems of poor rigidity and serious saw blade shaking and deviation of the existing adjustable-spacing gang saw draw saw equipment. The device comprises a frame body, clamping components and draw saw components, the draw saw components and the clamping components are correspondingly installed on two sides of the frame body, the draw saw components comprise saw blades, second guide rods, third sliding sleeves, clamping plates and connecting plates, the second guide rods are fixedly installed between the connecting plates, a plurality of third sliding sleeves are slidably installed on the second guide rods, and the saw blades are fixedly installed between the clamping plates; the clamping components comprise lifting cylinders, motors, transmission assemblies, driving rods, sliding blocks, connecting blocks and fixed blocks, the lifting cylinders drive the fixed blocks to intrude into the gaps of the saw blades, the motors drive the driving rods to rotate and drive the sliding blocks to change at equal intervals through the transmission assemblies, and the fixed blocks clamp and adjust the distances of the saw blades.

Description

Technical Field

[0001] This invention belongs to the field of stone slab cutting technology, and specifically relates to a variable-spacing gang saw. Background Technology

[0002] Stone is an indispensable core material in fields such as building decoration, municipal engineering, and home furnishing. With its advantages of hardness, natural texture, and high durability, it is widely used in various scenarios such as slab paving, decorative components, and artistic decoration. Stone cutting, as the first core process in deep stone processing, directly determines the quality of the finished stone and the economic benefits of the enterprise based on processing precision, cutting flatness, and production efficiency. Therefore, the structural optimization and performance upgrade of stone slab cutting machines have always been a key research direction in the stone processing industry. Currently, the mainstream stone slitting and processing equipment in the industry is the gang saw type cutting machine. Compared with single-blade cutting equipment, the gang saw structure can complete multiple equal-slice cuts of stone in one go through the synchronous reciprocating sawing operation of multiple sets of saw blades, significantly improving the slitting efficiency of large-scale stone slabs. It effectively adapts to the needs of large-scale and standardized stone processing production and has become the core equipment for mass processing of stone slabs. Existing traditional gang saws mostly use a fixed saw blade installation structure with a fixed saw blade spacing. When facing the different slab thickness processing requirements of different projects, it is necessary to manually disassemble, adjust, and reinstall the saw blades. The adjustment process is cumbersome, time-consuming, and has poor accuracy, which seriously affects the efficiency of production changeover and cannot adapt to the current stone processing production mode of multi-variety, small-batch, and rapid production changeover.

[0003] To address the industry pain point of inconvenient saw blade spacing adjustment in traditional equipment, existing technologies have developed gang saw cutting devices with adaptively adjustable saw blade spacing. Among them, patent number CN119840008A discloses a cutting machine for batch slicing stone slabs. This equipment uses four guide rails arranged in a rectangular array inside the machine housing, and the sliding cooperation between the guide rails and guide sleeves enables the reciprocating sawing movement of the gang saw mounting frame. It innovatively incorporates a spacing adjustment mechanism composed of an adjusting motor, drive rod, collar, drive ring, and scissor fork structure, which can automatically and precisely adjust the spacing of multiple sets of saw blades. This effectively solves the problems of cumbersome saw blade spacing adjustment, low precision, and poor changeover efficiency in traditional equipment, significantly improving the adaptability and production flexibility of the equipment. However, this patented equipment still has significant structural defects and performance shortcomings in practical applications. The gang saw mounting frame relies entirely on the sliding cooperation between the guide sleeves and guide rails for support and limitation, and the overall connection and positioning are only achieved through a linkage structure between multiple sets of guide sleeves, resulting in insufficient overall support rigidity. During the reciprocating cutting operation of stone gang saw, the saw blade moves continuously at high speed. The start, stop and reversal of the cutting stroke will generate a violent reciprocating inertial impact force. At the same time, the stone cutting resistance will generate a continuous alternating lateral force on the gang saw mounting frame. There is a slight fit gap between the guide sleeve and the guide rail. The flexible connecting rod limiting structure cannot effectively offset the reciprocating impact and lateral load, which can easily cause the guide sleeve to sway radially and shift left and right on the guide rail. This will cause the entire gang saw mounting frame and the internal saw blade to swing and shift, resulting in uneven cutting thickness of stone slabs, poor surface flatness, and quality problems such as chipping, burrs, off-cut, and bevels. This will significantly reduce the qualified rate of finished stone products and increase the secondary processing costs of subsequent grinding and finishing.

[0004] In summary, while current adjustable-spacing stone band sawing and cutting machines have solved the technical challenge of saw blade spacing adjustment, the industry urgently needs a stone slab slitting and band sawing machine that can balance rapid and precise saw blade spacing adjustment with high equipment stability and rigidity. This would address many shortcomings of existing technologies and improve the processing accuracy and production efficiency of mass stone band sawing and cutting. Summary of the Invention

[0005] The present invention aims to provide a variable-pitch gang saw, which solves the technical problems of poor operating rigidity and severe saw blade swaying and deviation in existing adjustable-pitch gang saws.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A variable-pitch gang saw includes a frame, a clamping component, and a sawing component. There are two sets of sawing components and clamping components, which are installed on both sides of the frame. The saw assembly includes a saw blade, a second guide rod, a third sliding sleeve, a clamping plate, and a connecting plate. The four corners of the lower part of the frame are provided with first mounting plates. Two connecting plates are fixedly installed on the inner side of the two opposing first mounting plates. The second guide rod is fixedly installed between the two connecting plates. Multiple third sliding sleeves are slidably installed on the second guide rod. The clamping plates are installed in pairs on both sides of the third sliding sleeve. The saw blade is fixedly installed between the two clamping plates. The clamping components include a second mounting plate, connectors, a lifting cylinder, a motor, a second mounting plate, a third mounting plate, a transmission assembly, a first guide rod, a drive rod, a slider, a connecting block, and a fixing block. The connectors are fixedly installed on both sides of the upper part of the frame. The second mounting plate is fixedly installed on the upper part of the two connectors. The lifting cylinder is fixedly installed in the middle of the second mounting plate. The lower part of the lifting cylinder is fixedly connected to the third mounting plate. The third mounting plate has a fourth mounting plate integrally formed on both sides. The motor is fixedly installed on the upper part of the third mounting plate, and its drive shaft passes through the fourth mounting plate. The drive rod is rotatably installed on the fourth mounting plate and located below the third mounting plate. The transmission assembly is installed between the drive shaft of the motor and the drive rod. There are two first guide rods, which are fixedly installed on the fourth mounting plate and located on both sides of the drive rod. There are multiple sliders, which are movably installed on the drive rod. The connecting block is integrally formed on the lower side of the slider. The fixing block is fixedly installed on the lower part of the connecting block. The motor drives the drive rod to rotate through the transmission assembly, thereby driving multiple sliders to move at equal distances. The fixing block is fixedly inserted into the saw blade gap and adjusts and clamps the saw blade.

[0007] Preferably, the frame also includes a hinged mounting plate for mounting on the flywheel-driven swing arm.

[0008] Preferably, the frame also includes a first sliding sleeve for mounting on the linear guide rod.

[0009] Preferably, the clamping component further includes a baffle, which is fixedly installed inside the clamping component.

[0010] Preferably, the drive rod is symmetrically provided with involute grooves, and the slider is provided with a limiting component that matches the involute groove. Multiple sliders are installed in the involute groove one by one by the limiting component. The rotation of the drive rod can drive the slider to change at equal distances.

[0011] Preferably, the number of sliders is one more than the number of saw blades, which is used to simultaneously limit all saw blades on both ends.

[0012] Preferably, the clamping component further includes a sliding rod and a second sliding sleeve. The second sliding sleeve is disposed on both sides of the lifting cylinder. There are two sliding rods, which are fixedly installed on the upper part of the third mounting plate. The sliding rods are slidably disposed in the second sliding sleeve. The sliding rods and the second sliding sleeve are slidably engaged to guide the lifting and lowering of the third mounting plate and prevent the lifting cylinder from being unbalanced.

[0013] Preferably, the fixing block is a square base, with multiple stepped support sections symmetrically arranged on both sides of the base. The stepped support levels on both sides correspond one-to-one and support each other in opposite directions to form a stepped support structure. Each stepped platform faces each other and abuts against the side of the saw blade, realizing the synchronous positioning, spacing adjustment and fixing of multiple saw blades.

[0014] Preferably, the clamping plate is provided with multiple oblong holes, and the saw blade is fixedly installed in the oblong holes.

[0015] Preferably, the sawing component also includes a spring disposed between each third sliding sleeve to prevent the fixing block from properly penetrating the saw blade when the saw blade spacing is too small.

[0016] The beneficial effects of this invention are as follows: 1. The variable-spacing gang saw provided by this invention, by symmetrically arranging two sets of sawing components and clamping components on both sides of the frame, and the sawing components adopting the installation method of sliding cooperation between the second guide rod and multiple third sliding sleeves, allows the saw blade to slide freely along the second guide rod to achieve spacing adjustment. At the same time, the second guide rod, as a rigid guide component running through all the third sliding sleeves, provides a continuous, stable, and highly rigid common support foundation for all saw blades compared to the existing technology that relies solely on the sliding cooperation between the guide sleeve and the guide rail, and the positioning of each guide sleeve is only achieved through flexible connecting rods. This greatly enhances the overall vibration resistance and lateral rigidity of the saw blade group in the reciprocating sawing motion, effectively offsetting the reciprocating inertial impact force generated by the start and stop of the cutting stroke and the continuous alternating lateral load generated by the stone cutting resistance, and avoiding radial swaying and left and right offset of the third sliding sleeve on the guide rod, fundamentally eliminating the problems of saw blade swaying and misalignment. Meanwhile, the clamping component drives the fixing block downward into the saw blade gap via the lifting cylinder. The motor drives multiple sliders to move at equal intervals through the transmission component and drive rod, so that the fixing block can directly clamp and fix the saw blade while realizing the equal interval adjustment of the saw blade. The distance adjustment function and the clamping function are integrated into one, which not only ensures the rapid and accurate adjustment of the saw blade distance, but also forms a firm positioning constraint on the saw blade during the cutting operation. This further improves the installation rigidity and working stability of the saw blade, ensures the uniformity of the cutting thickness of the stone slab and the flatness of the cut surface, greatly improves the qualification rate of the finished stone products, and reduces the secondary processing costs of subsequent grinding and finishing.

[0017] 2. By using a baffle to isolate the cutting area between the clamping component and the sawing component, the stone chips and coolant splashes generated by the high-speed reciprocating motion of the saw blade during the stone sawing process are effectively intercepted by the baffle and cannot invade the area where the precision moving parts of the clamping component, such as the motor, transmission components, drive rod, slider, and lifting cylinder, are located.

[0018] 3. By setting the fixing block as a square base and symmetrically arranging multiple stepped support sections on both sides of the base, the stepped support levels on both sides correspond one-to-one and support each other, forming a stepped support structure. Each stepped platform faces each other and abuts against the side of the saw blade, achieving synchronous positioning, spacing adjustment, and fixing of multiple saw blades. This unique stepped structure allows one fixing block to simultaneously participate in the clamping and positioning of two adjacent saw blades. That is, the stepped platform on the left side of the fixing block abuts against the right side of the adjacent saw blade on the left, and the same stepped platform on the right side of the fixing block abuts against the left side of the adjacent saw blade on the right. The two platforms support each other to form a stable clamping and positioning pair. Because the stepped levels on both sides correspond one-to-one, it ensures that the clamping positions of adjacent saw blades on the left and right sides of the same fixing block are at the same horizontal height and the same vertical plane, thus ensuring that each saw blade is precisely clamped in the same plane in the thickness direction, without tilting or twisting. After multiple fixed blocks are arranged in sequence, all saw blades are clamped between the fixed blocks to form an integral rigid connection. When the saw blade is subjected to cutting resistance during the cutting process, the resistance is transmitted to the fixed blocks through the stepped platforms on both sides of the saw blade. Since the stepped platforms on both sides support each other, the resistance cancels out and balances each other. The fixed blocks themselves are subjected to balanced forces and will not generate deflection torque, thus ensuring the positioning accuracy and service life of the fixed blocks during long-term use.

[0019] 4. By setting multiple oblong holes in the clamping plate and fixing the saw blades within these holes, the elongated oval structure of the oblong holes provides an adjustment margin for the saw blades' installation position on the clamping plate. During equipment assembly, operators can fine-tune the saw blade's installation position along the length of the oblong holes to compensate for straightness errors in the second guide rod, machining errors in the third sliding sleeve, and installation position errors in the clamping plate. This ensures that each saw blade is initially positioned in an ideal vertical plane, guaranteeing the parallelism and coplanarity of all saw blades. Furthermore, after minor wear occurs during long-term use, the saw blade's position can be slightly adjusted through the oblong holes to compensate for the wear, extending the effective service life of the saw blades and reducing the need for frequent blade replacements, thus lowering equipment operating costs.

[0020] 5. By placing springs between every two third sliding sleeves, the elastic force of the springs keeps adjacent third sliding sleeves naturally spaced apart. This ensures that all saw blades and third sliding sleeves are spread out on the second guide rod before the clamping block penetrates the saw blade gap. This structure effectively prevents the problem that when the motor drives the sliders to move at equal intervals, if the set distance between the sliders is less than the actual distance between the saw blades, the fixing block will collide with the side of the saw blade and fail to properly penetrate the saw blade gap when the lifting cylinder drives the fixing block to descend. The presence of the springs ensures that the saw blade always has an outward spreading tendency. When the fixing block descends, its front end can smoothly insert into the gap between adjacent saw blades. As the fixing block continues to descend, the stepped surfaces on both sides of the fixing block gradually abut against and push the saw blade to move to both sides, compressing the springs until the saw blade is precisely pushed to the position defined by the stepped surfaces of the fixing block.

[0021] 6. By symmetrically arranging involute grooves on the drive rod and setting matching limiting components inside the sliders, multiple sliders are individually positioned within the involute grooves by the limiting components. When the drive rod rotates, the limiting components move along the trajectory of the involute grooves, thereby driving the sliders to change at equal intervals. Compared to the existing technology that uses a scissor structure to achieve equal-distance adjustment, the matching structure of the involute groove and the limiting components is simpler and more compact, requiring no additional installation space. Furthermore, the helical trajectory of the involute groove can convert the rotational motion of the drive rod into the axial linear motion of the slider. The motion conversion process is continuous and smooth, eliminating the motion lag and positional deviation caused by the accumulated hinge gaps during the movement of the scissor structure, thus achieving higher adjustment accuracy and repeatability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention patent; Figure 2 This is a schematic diagram of the overall structure of the frame of the present invention. Figure 3 This is a schematic diagram of the overall structure of the saw component of this invention patent; Figure 4 This invention patent Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the overall structure of the clamping component of this invention patent; Figure 6 This is a partial structural schematic diagram of the clamping component of the present invention. Figure 7 This is a partial exploded view of the clamping component of this invention patent.

[0024] The reference numerals in the accompanying drawings include: 100. Frame; 101. First sliding sleeve; 102. First mounting plate; 103. Hinged mounting plate; 200. Clamping component; 201. Second mounting plate; 202. Connector; 203. Second sliding sleeve; 204. Lifting cylinder; 205. Sliding rod; 206. Baffle; 207. Third mounting plate; 208. Fourth mounting plate; 209. Motor; 210. Transmission assembly; 211. First guide rod; 212. Drive rod; 213. Slider; 214. Connecting block; 215. Fixing block; 216. Limiting component; 217. Involute groove; 300. Saw assembly; 301. Saw blade; 302. Second guide rod; 303. Connecting plate; 304. Clamping plate; 305. Spring; 306. Waist-shaped hole; 307. Third sliding sleeve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this invention.

[0027] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. Where the terms "first," "second," and "third" are used for descriptive purposes and to distinguish technical features, they should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0029] like Figure 1 and Figure 2 As shown, the variable-pitch gang saw comprises a frame 100, which forms the basic support skeleton of the entire equipment, used to support and install all other functional components. On both sides of the frame 100, two sets of sawing components 300 and two sets of clamping components 200 are installed symmetrically on the left and right sides of the frame 100. This symmetrical arrangement ensures balanced force during operation, preventing unilateral force from causing the frame 100 to tilt or twist. The sawing components 300 are the core working components that perform the reciprocating cutting motion, while the clamping components 200 are the control components that adjust the saw blade spacing and clamp the saw blades for positioning. The two sets of sawing components 300 and clamping components 200 work in pairs on both sides of the frame 100 to achieve bidirectional reciprocating sawing of the stone slab.

[0030] The frame 100 has four lower corner mounting plates 102, which are flat and can be fixed to the four lower corners of the frame 100 by welding or bolting. Each corner mounting plate 102 extends inward toward the frame 100, forming a support platform for mounting other components. The frame 100 also includes a hinged mounting plate 103, which is located on the side of the frame 100 and is used to mount the entire frame 100 onto a swing arm driven by a flywheel. The flywheel drives the frame 100 to reciprocate through the swing arm, thereby realizing the saw blade's back-and-forth cutting action. The frame 100 also includes a first sliding sleeve 101, which is a cylindrical structure and is located on the side of the frame 100. It is used to fit onto the linear guide rod. The linear guide rod guides and limits the reciprocating motion of the frame 100, ensuring that the frame 100 runs stably along the set trajectory under the drive of the flywheel swing arm, and preventing the frame 100 from swaying or deviating perpendicular to the direction of motion.

[0031] The specific structure of the saw component 300 is as follows: Figure 3 and Figure 4As shown. Two connecting plates 303 are respectively fixedly installed on the inner sides of two opposing first mounting plates 102. That is, on the same side of the frame 100, a connecting plate 303 is installed between the two first mounting plates 102 located at the front and rear ends or left and right ends. The connecting plates 303 can be fixed to the inner side of the first mounting plates 102 by bolt fastening. A second guide rod 302 is fixedly installed between the two connecting plates 303. The second guide rod 302 is a long strip-shaped round rod, and its two ends are fixedly connected to the two connecting plates 303 by threaded connection or pin connection. The length direction of the second guide rod 302 is perpendicular to the mounting surface of the connecting plate 303, and the extension direction of the second guide rod 302 is the spacing direction of the saw blades 301. Multiple third sliding sleeves 307 are slidably mounted on the second guide rod 302. Each third sliding sleeve 307 is a cylindrical sleeve with an inner diameter that matches the outer diameter of the second guide rod 302. The third sliding sleeve 307 is fitted onto the second guide rod 302 and can slide freely along its axial direction. The number of third sliding sleeves 307 is determined according to actual cutting requirements, typically multiple, with each third sliding sleeve 307 corresponding to a set of saw blades 301. A clamping plate 304 is installed on each side of each third sliding sleeve 307, forming a set of two clamping plates 304. The clamping plates 304 are flat plate components, arranged parallel to each other facing each other. The third sliding sleeve 307 is clamped between the two clamping plates 304, which can be fixedly connected to the third sliding sleeve 307 with bolts. A saw blade 301 is fixedly installed between two sets of clamping plates 304. The saw blade 301 is a circular, thin-bladed cutting tool. The center of the saw blade 301 is clamped between the two clamping plates 304. The saw blade 301 is clamped and fixed by bolts passing through the mounting holes in the clamping plates 304 and the center of the saw blade 301. To facilitate fine-tuning of the installation position of the saw blade 301 on the clamping plates 304, multiple oblong holes 306 are provided on the clamping plates 304. The oblong holes 306 are elongated through holes. The saw blade 301 is fixedly installed on the clamping plates 304 by bolts passing through the oblong holes 306. The adjustment margin provided by the oblong holes 306 allows for small adjustments to the installation position of the saw blade 301 on the clamping plates 304 to compensate for processing and assembly errors. A spring 305 is provided between each pair of adjacent third sliding sleeves 307. The spring 305 is sleeved on the second guide rod 302. The two ends of the spring 305 abut against the opposite end faces of the two adjacent third sliding sleeves 307 respectively. The spring 305 applies an elastic thrust to the two adjacent third sliding sleeves 307, so that each third sliding sleeve 307 remains relatively dispersed when not constrained by external force. This function is to prevent the gap between the saw blades 301 from being too small during the descent of the clamping component 200, so that the subsequent fixing block 215 cannot be correctly inserted into the gap of the saw blades 301, thus ensuring the normal operation of the distance adjustment.When the sawing component 300 is working, multiple saw blades 301 slide along the second guide rod 302 with the third sliding sleeve 307, thereby adjusting the spacing between the saw blades 301.

[0032] The specific structure of the clamping component 200 is as follows: Figure 5 , Figure 6 and Figure 7As shown. Connectors 202 are fixedly installed on both sides of the upper part of the frame 100. The connectors 202 can be angle steel or block components, with one end fixedly connected to the frame 100 and the other end extending upward. A second mounting plate 201 is fixedly installed on the upper part of the two connectors 202. The second mounting plate 201 is a flat plate component, arranged horizontally, with both ends fixedly connected to the upper ends of the two connectors 202 respectively. The second mounting plate 201 provides a mounting base for other components of the clamping component 200. A lifting cylinder 204 is fixedly installed in the middle of the second mounting plate 201. The lifting cylinder 204 can be a pneumatic cylinder or a hydraulic cylinder. The cylinder body of the lifting cylinder 204 is fixedly connected to the second mounting plate 201 by bolts or a flange, and the piston rod of the lifting cylinder 204 extends vertically downward. A third mounting plate 207 is fixedly connected to the lower part of the lifting cylinder 204, meaning the end of the piston rod of the lifting cylinder 204 is fixedly connected to the upper surface of the third mounting plate 207. When the lifting cylinder 204 extends or retracts, it can drive the third mounting plate 207 to move vertically up and down. A fourth mounting plate 208 is integrally formed on both sides of the third mounting plate 207. The fourth mounting plate 208 and the third mounting plate 207 are an integral structure, which can be integrally formed by casting or forging. The fourth mounting plate 208 extends downward from the two side edges of the third mounting plate 207, forming two vertically downward side plates. The fourth mounting plate 208 is used to support other transmission and guiding parts of the clamping component 200. To ensure the stability of the third mounting plate 207 during lifting and lowering, and to prevent the lifting cylinder 204 from bearing excessive eccentric torque that could affect its service life and positioning accuracy, the clamping component 200 is also provided with a sliding rod 205 and a second sliding sleeve 203. Specifically, the second sliding sleeve 203 is disposed on both sides of the lifting cylinder 204. The second sliding sleeve 203 is a cylindrical sleeve and is fixedly installed on the second mounting plate 201. The two second sliding sleeves 203 are symmetrically arranged with respect to the lifting cylinder 204. There are two sliding rods 205. The sliding rods 205 are long cylindrical rods. The lower ends of the two sliding rods 205 are respectively fixedly installed on both sides of the upper surface of the third mounting plate 207. The upper ends of the sliding rods 205 extend upward and are slidably disposed inside the second sliding sleeves 203. The outer diameter of the sliding rods 205 is precisely matched with the inner diameter of the second sliding sleeves 203, and the sliding rods 205 can slide freely up and down along the inner hole of the second sliding sleeves 203. When the lifting cylinder 204 drives the third mounting plate 207 to rise and fall, the two sliding rods 205 slide synchronously within the second sliding sleeve 203, guiding and constraining the lifting movement of the third mounting plate 207, preventing the third mounting plate 207 from shifting or tilting in the horizontal direction, thereby ensuring that the lifting cylinder 204 only bears the axial load in the vertical direction and avoiding the occurrence of off-center load.

[0033] A motor 209 is fixedly mounted on the upper part of the third mounting plate 207. The motor 209 can be a stepper motor or a servo motor, and its body is fixed to the third mounting plate 207 with bolts. The drive shaft of the motor 209 extends vertically downward, passing through the upper surface of the fourth mounting plate 208 and extending into the internal space of the fourth mounting plate 208. At the lower part of the third mounting plate 207, a drive rod 212 is rotatably mounted on the fourth mounting plate 208. The drive rod 212 is a long cylindrical rod, and its two ends are rotatably connected to the two side walls of the fourth mounting plate 208 through bearings or bushings. The axial direction of the drive rod 212 is parallel to the axial direction of the second guide rod 302. A transmission assembly 210 is installed between the drive rod 212 and the drive shaft of the motor 209. The transmission assembly 210 can be a belt drive mechanism, a chain drive mechanism, or a gear drive mechanism, used to transmit the rotational motion of the drive shaft of the motor 209 to the drive rod 212, causing the drive rod 212 to rotate around its own axis. Two first guide rods 211 are also fixedly installed on the fourth mounting plate 208. The two first guide rods 211 are located on both sides of the drive rod 212. The first guide rods 211 are long strip-shaped round rods, and their two ends are fixedly connected to the two side walls of the fourth mounting plate 208. The axial direction of the first guide rods 211 is parallel to the axial direction of the drive rod 212. Multiple sliders 213 are movably installed on the drive rod 212. The sliders 213 are block-shaped components. The sliders 213 have through holes that are adapted to the outer diameter of the drive rod 212. The drive rod 212 passes through the through holes of the sliders 213. The sliders 213 also have limiting members 216 that match the involute grooves 217 on the drive rod 212. The drive rod 212 is symmetrically provided with involute grooves 217, which are helical grooves formed on the outer circumferential surface of the drive rod 212. The left and right sides of the involute grooves 217 have opposite directions of rotation and are symmetrically distributed on the two halves of the drive rod 212. Multiple sliders 213 are installed in the involute grooves 217 one by one by internal limiting members 216. The limiting members 216 can be sliding pins or ball bearings. One end of the limiting member 216 is embedded in the involute groove 217 and slides in cooperation with the groove wall of the involute groove 217, while the other end is fixedly connected to the slider 213. When the drive rod 212 rotates around its own axis, since the limiting member 216 is restricted within the involute groove 217, as the drive rod 212 rotates, the limiting member 216 moves along the trajectory of the involute groove 217, forcing the slider 213 to be displaced along the axial direction of the drive rod 212. Because the involute grooves 217 on the left and right sides are symmetrically arranged and rotate in opposite directions, the sliders 213 located on different halves will move axially in opposite directions, thereby causing the spacing between multiple sliders 213 to change synchronously and equidistantly. The two first guide rods 211 pass through the corresponding guide holes on each slider 213 to guide the slider 213 to slide along the axis of the drive rod 212, preventing the slider 213 from rotating circumferentially with the drive rod 212, so that the slider 213 can only reciprocate along the axial direction of the drive rod 212.The number of sliders 213 is set to be one more than the number of saw blades 301, so that all saw blades 301 can be simultaneously limited on both ends. That is, the two outermost sliders 213 are located on the outermost left and outermost right ends of the array of all saw blades 301, respectively, and the middle sliders 213 are located in the gap between two adjacent saw blades 301, thereby achieving full limitation of all saw blades 301.

[0034] A connecting block 214 is integrally formed on the lower side of the slider 213, extending downward from the lower surface of the slider 213. The connecting block 214 and the slider 213 are an integral structure. A fixing block 215 is fixedly installed at the lower part of the connecting block 214. The fixing block 215 is fixedly connected to the lower end of the connecting block 214 by threaded connection or welding, and moves together with the slider 213. The fixing block 215 is a square base, with multiple stepped support parts symmetrically arranged on both sides of the base. The stepped support levels on both sides correspond one-to-one and support each other in opposite directions, forming a stepped support structure. Specifically, the base of the fixing block 215 is cuboid in shape, and multiple steps are symmetrically processed on the left and right sides of the base. Each step includes a horizontal step surface and a vertical step side. The step surfaces on the left and right sides are horizontally opposite each other, forming paired support surfaces that support each other in opposite directions. Each stepped platform is used to abut against the sides of the saw blade 301, meaning that each pair of opposite stepped platforms clamps the left and right sides of a saw blade 301 from both sides. Since the number of fixing blocks 215 is the same as the number of sliders 213, that is, one more than the number of saw blades 301, when the fixing blocks 215 are arranged equidistantly with the sliders 213, a gap is formed between two adjacent fixing blocks 215 that can just accommodate one saw blade 301. The stepped platforms on both sides of each fixing block 215 abut against the opposite sides of two adjacent saw blades 301. The multiple fixing blocks 215 work together to achieve synchronous positioning, spacing adjustment and clamping fixation of multiple saw blades 301.

[0035] The clamping component 200 also includes a baffle 206, which is fixedly installed on the inner side of the clamping component 200, that is, the baffle 206 is installed on the inner side wall of the frame 100, located between the clamping component 200 and the sawing component 300. The baffle 206 is a flat plate component used to shield the chips and coolant generated during the cutting process, preventing chips from splashing onto the various moving parts of the clamping component 200, avoiding wear and jamming, and ensuring the normal operation of the clamping component 200.

[0036] When the variable-pitch gang saw is in operation, the motor 209 is first started. The motor 209 drives the drive rod 212 to rotate through the transmission assembly 210. The involute groove 217 on the drive rod 212 drives each slider 213 to slide equidistantly along the first guide rod 211 and the drive rod 212 through the limiting member 216. The slider 213 drives the connecting block 214 and the fixing block 215 to move synchronously, so that the spacing between each fixing block 215 changes equidistantly according to the set value. Then the lifting cylinder 204 is started, and the lifting cylinder 204 drives the third mounting plate 207 to move downward. The third mounting plate 207 drives the fourth mounting plate 208 and the motor 209, transmission assembly 210, first guide rod 211, drive rod 212, slider 213, connecting block 214 and fixing block 215 mounted on it to move downward as a whole. The fixing block 215 penetrates downward into the gap between adjacent saw blades 301. The stepped surfaces on both sides of the fixing block 215 abut against the opposite sides of the two adjacent saw blades 301, equidistantly positioning and clamping the saw blades 301. At this time, the spring 305 is compressed, and the distance between each third sliding sleeve 307 is limited by the fixing block 215. The saw blade 301 is constrained to a fixed position on the second guide rod 302 along with the third sliding sleeve 307. After clamping, the flywheel drives the hinged mounting plate 103 to swing back and forth through the swing arm. The frame 100 moves back and forth along the guide of the first sliding sleeve 101 and the linear guide rod. The saw blade 301 of the sawing component 300 performs a back and forth sawing action on the stone slab. After cutting, the lifting cylinder 204 drives the fixing block 215 to move upward out of the gap between the saw blades 301. The spring 305 pushes open each third sliding sleeve 307, and the saw blade 301 returns to a free state, ready for the next distance adjustment operation.

[0037] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the invention and are protected by patent law.

Claims

1. A variable-pitch gang saw, comprising a frame, characterized in that, It also includes clamping components and sawing components, with two sets of sawing components and clamping components installed on both sides of the frame; The sawing component includes a saw blade, a second guide rod, a third sliding sleeve, a clamping plate, and a connecting plate. First mounting plates are provided at the four corners of the lower part of the frame. Two connecting plates are fixedly installed inside the two opposing first mounting plates. The second guide rod is fixedly installed between the two connecting plates. Multiple third sliding sleeves are slidably installed on the second guide rods. Two clamping plates are installed on both sides of the third sliding sleeve. The saw blade is fixedly installed between the two clamping plates. The clamping component includes a second mounting plate, connectors, a lifting cylinder, a motor, a second mounting plate, a third mounting plate, a transmission assembly, a first guide rod, a drive rod, a slider, a connecting block, and a fixing block. The connectors are fixedly installed on both sides of the upper part of the frame. The second mounting plate is fixedly installed on the upper parts of the two connectors. The lifting cylinder is fixedly installed in the middle of the second mounting plate. The lower part of the lifting cylinder is fixedly connected to the third mounting plate. The fourth mounting plate is integrally formed on both sides of the third mounting plate. The motor is fixedly installed on the upper part of the third mounting plate, and its drive shaft passes through the fourth mounting plate. The drive rod rotates. The transmission assembly is installed on the fourth mounting plate and located below the third mounting plate. The transmission assembly is installed between the drive shaft of the motor and the drive rod. There are two first guide rods, which are fixedly installed on the fourth mounting plate and located on both sides of the drive rod. There are multiple sliders, which are movably installed on the drive rod. The connecting block is integrally formed on the lower side of the slider. The fixing block is fixedly installed on the lower part of the connecting block. The motor drives the drive rod to rotate through the transmission assembly, thereby driving the multiple sliders to move at equal distances. The fixing block is fixedly inserted into the saw blade gap and adjusts and clamps the saw blade.

2. A variable-pitch gang saw according to claim 1, characterized in that, The frame also includes a hinged mounting plate for mounting on the flywheel-driven swing arm.

3. A variable-pitch gang saw according to claim 1, characterized in that, The frame also includes a first sliding sleeve, which is used to mount the linear guide rod.

4. A variable-pitch gang saw according to claim 1, characterized in that, The clamping component also includes a baffle, which is fixedly installed inside the clamping component.

5. A variable-pitch gang saw according to claim 1, characterized in that, The drive rod is symmetrically provided with involute grooves, and the slider is provided with a limiting member that matches the involute groove. Multiple sliders are installed in the involute groove one by one by the limiting member. The rotation of the drive rod can drive the slider to change at equal intervals.

6. A variable-pitch gang saw according to claim 1, characterized in that, The number of sliders is one more than the number of saw blades, which is used to simultaneously limit all the saw blades on both the beginning and end sides.

7. A variable-pitch gang saw according to claim 1, characterized in that, The clamping component also includes a sliding rod and a second sliding sleeve. The second sliding sleeve is disposed on both sides of the lifting cylinder. There are two sliding rods, which are fixedly installed on the upper part of the third mounting plate. The sliding rods are slidably disposed in the second sliding sleeve. The sliding rods and the second sliding sleeve are slidably engaged to guide the lifting and lowering of the third mounting plate and prevent the lifting cylinder from being unbalanced.

8. A variable-pitch gang saw according to claim 1, characterized in that, The fixing block is a square base with symmetrical multi-layer stepped support parts on both sides. The stepped support levels on both sides correspond one-to-one and support each other, forming a stepped support structure. Each stepped platform faces each other and abuts against the side of the saw blade, realizing the synchronous positioning, spacing adjustment and fixing of multiple saw blades.

9. A variable-pitch gang saw according to claim 1, characterized in that, The clamping plate is provided with multiple oblong holes, and the saw blade is fixedly installed in the oblong holes.

10. A variable-pitch gang saw according to claim 1, characterized in that, The saw component also includes a spring disposed between each of the third sliding sleeves.

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