All-steel double beam large cutting machine

Abstract

The application discloses a full-steel double-beam large cutting machine, which comprises two side beams arranged longitudinally at intervals, a cross beam movably arranged between the two side beams in the longitudinal direction, the cross beam comprising a second beam body and two first beam bodies arranged in parallel, the two first beam bodies being connected together through a plurality of reinforcing pipes, and the second beam body being arranged above the reinforcing pipes, the cross beam of the application is composed of two first beam bodies connected together through the reinforcing pipes, the two first beam bodies are connected together to disperse stress, the reinforcing pipes can improve the structural strength and bearing capacity of the cross beam and reduce the overall weight of the cross beam when the cross beam needs to be lengthened or widened, the manufacturing cost is saved, and the structural strength and bearing capacity of the cross beam are avoided from being reduced due to the increase of the weight and size, and a circulating heat dissipation structure is arranged in the main shaft box to solve the problem that the main shaft box is overheated due to long-time work of saw blades in the prior art, and the service life is short.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of stone processing machinery, and particularly relates to a full-steel double-beam large cutting machine. BACKGROUND

[0002] At present, the demand for various stone materials is increasing, so the processing device of the stone material is concerned. The bridge type stone cutting machine is widely used in the field of stone processing due to its fast cutting speed. The existing bridge type stone cutting machine usually comprises a side beam, a cross beam and a saw blade connecting shaft assembly. The cross beam is arranged on the left and right symmetrical side beams. The saw blade connecting shaft assembly is movably arranged on the cross beam through a moving seat. The moving seat moves left and right on the cross beam to adjust the position of the cutting knife.

[0003] For example, the Chinese invention patent with the publication number CN111633838A discloses a high-efficiency energy-saving stone cutting machine and a working method thereof. The high-efficiency energy-saving stone cutting machine comprises a machine table and a machine base arranged on the machine table. The machine base is provided with a main shaft for driving the stone cutting saw blade to rotate. The main shaft is provided with a belt pulley. The belt pulley is provided with a clutch. The driving part of the clutch is fixedly connected with the belt pulley. The driven part of the clutch is fixedly connected with the main shaft. The machine base is provided with a motor and a belt pulley transmission mechanism driven by the motor. The belt pulley transmission mechanism transmits power to the belt pulley on the main shaft. The clutch is installed in the belt pulley on the main shaft. The clutch gradually develops from the disengaged state to the engaged state, so that the force transmitted by the motor to the main shaft and the cutting saw blade on the main shaft is gradually increased. The large current required for instantaneous starting of the motor is avoided. The load of the electrical equipment is reduced. The energy consumption is greatly reduced.

[0004] When the above-mentioned stone cutting machine cuts large stone materials, a plurality of large saw blades are assembled on the main shaft. These very heavy and large saw blades need to run for a long time at high strength and high speed during work. The stability problems such as shaking and jumping may occur during running. The main shaft is arranged on the cross beam through a sliding seat, and the cross beam bears the stress of the main shaft and the saw blade. In order to overcome the instability problems such as shaking and jumping during running, the size of the entire cross beam needs to be relatively wide and large to bear the stress. However, making the size of the entire cross beam larger requires more materials and consumes a large amount of manufacturing cost. Moreover, making the size of the cross beam too large increases the weight and size of the cross beam, thereby affecting the bearing effect of the cross beam. In addition, the main shaft box of the traditional stone cutting machine on the market usually does not have a heat dissipation function. The main shaft box may be seriously heated due to the long-time work of the saw blade, thereby affecting the service life of the main shaft box.

[0005] In view of the above problems, the present applicant has conducted in-depth research, and thus the present case is produced. SUMMARY

[0006] The purpose of this invention is to provide a large cutting machine with an all-steel double beam design that has low manufacturing cost, can effectively improve the load-bearing capacity of the crossbeam, and has a heat dissipation function on the main shaft.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A double-beam all-steel cutting machine includes two longitudinally spaced side beams, a crossbeam longitudinally movable between the two side beams, a middle frame assembly sleeved on the crossbeam, a traversing mechanism for driving the middle frame assembly to move laterally, a saw blade spindle assembly fixed to the crossbeam via the middle frame assembly, and a lifting mechanism mounted on the middle frame assembly for driving the saw blade spindle assembly to rise and fall. The crossbeam includes a second beam and two parallel first beams, which are connected together by multiple reinforcing tubes, and the second beam is mounted above the reinforcing tubes. The saw blade spindle assembly includes a spindle box assembly, a saw blade connected to the output end of the spindle box assembly, and a saw blade drive mechanism connected to the input end of the spindle box assembly.

[0009] The spindle box assembly includes a spindle box body. An output shaft hole is formed on the side wall of the spindle box body at its output end, and a saw blade spindle is rotatably connected within the output shaft hole. An input shaft hole is formed on the side wall of the spindle box body at its input end, and a drive shaft is rotatably connected within the input shaft hole. The drive shaft and the saw blade spindle are drively connected. The spindle box body includes a first box and a second box arranged at intervals along the length of the spindle box body. The first box body is located near the output shaft hole. A bearing seat for mounting the saw blade spindle is provided in the first box body at a position corresponding to the output shaft hole. Cooling oil channels communicating with the output shaft hole are provided on both sides of the spindle box body at positions corresponding to the bearing seats. The cooling oil channels are respectively located in the side walls on both sides of the spindle box body. The inlet of the cooling oil channel is located below the first box body, and the outlet of the cooling oil channel is located above the bearing seat. The diameter of the oil inlet channel is larger than the diameter of the oil outlet channel.

[0010] Furthermore, a drive gear is fixed on the drive shaft, and a driven gear that meshes with the drive gear is fixed on the saw blade spindle. The drive shaft and the saw blade spindle are connected by transmission through the drive gear and the driven gear. Both the drive gear and the driven gear are located in the second housing. The diameter of the drive gear is smaller than the diameter of the driven gear, and the drive gear is located above the driven gear.

[0011] Furthermore, the first box has a first opening at its top, and the second box has a second opening at its top. The first box also includes a first upper cover plate for covering the first opening, and the second box also includes a second upper cover plate for covering the second opening. The inner side of the first box is provided with a first support plate for supporting the first upper cover plate at the position corresponding to the first opening, and the inner side of the second box is provided with a second support plate for supporting the second upper cover plate at the position corresponding to the second opening.

[0012] Furthermore, the top of the first housing is provided with an exhaust groove that connects to the first opening, and an exhaust port is provided at the bottom of the exhaust groove. The first upper cover is placed after the first opening, and the horizontal position of the top surface of the first upper cover is lower than the horizontal position of the top surface of the first housing.

[0013] Furthermore, the cooling oil passage includes an oil inlet channel and an oil outlet channel that are interconnected. The oil inlet channel is arranged horizontally and its inlet is located below the first housing. The oil outlet channel is arranged vertically and its outlet is located above the bearing seat. A circulating oil hole that connects to the output shaft hole is opened in the middle of the oil outlet channel.

[0014] Furthermore, the transverse movement mechanism includes transverse slide rails respectively disposed on the two first beams, transverse slide blocks slidably disposed on the transverse slide rails, a rack disposed on the second beam, and a transverse drive motor disposed on the middle frame assembly. The rack and the two transverse slide rails are arranged along the length direction of the beam and are parallel to each other. The transverse slide blocks are fixedly disposed on the middle frame assembly. The output end of the transverse drive motor is provided with a drive gear that meshes with the rack.

[0015] Furthermore, each of the two first beams is provided with a slide rail mounting seat for mounting the transverse slide rail, and the second beam is provided with a rack mounting seat for mounting the rack.

[0016] Furthermore, the reinforcing tube includes a first reinforcing tube and a second reinforcing tube, with the first reinforcing tube located above the second reinforcing tube and the second beam located on top of the first reinforcing tube.

[0017] Furthermore, the lifting mechanism includes guide columns respectively disposed at the four corners of the middle frame assembly and a lifting drive mechanism for driving the guide columns to rise and fall. The four corners of the middle frame assembly are provided with guide column holes for the guide columns to pass through on the outer side of the crossbeam. The guide column holes are arranged vertically, and the guide columns pass through the four guide column holes one by one. The upper ends of the four guide columns are mounted together on a mounting plate, and the lower ends of the four guide columns are mounted together on a fixing plate. The saw blade spindle assembly is fixed to the bottom of the fixing plate.

[0018] Furthermore, the saw blade drive mechanism includes a saw blade drive motor and a pulley transmission mechanism disposed at the output end of the saw blade drive motor. The saw blade drive motor is connected to the input end of the spindle box assembly through the pulley transmission mechanism.

[0019] By adopting the aforementioned design scheme, the beneficial effects of the present invention are:

[0020] First, the crossbeam of the present invention is composed of two first beams connected by reinforcing tubes to form a whole crossbeam. The two first beams are connected together to distribute the force. When the crossbeam needs to be lengthened or widened, the multiple reinforcing tubes can improve the structural strength and load-bearing capacity of the crossbeam and reduce its overall weight. While saving manufacturing costs, it can also prevent the crossbeam from reducing its structural strength and load-bearing capacity due to the increase in weight and size.

[0021] Secondly, the bearing housing of the spindle box of this invention has a heat dissipation oil channel, which allows the lubricating oil with excessively high temperature in the bearing housing to exchange heat with the air through the heat dissipation oil channel, transferring heat to the air above the oil. After the oil and air exchange heat, the oil flows back, thereby keeping the temperature of the lubricating oil in the spindle box in a relatively stable state. This continuous heat exchange keeps the temperature of the lubricating oil in the spindle box in a relatively low and stable state, enabling the spindle box of this invention to achieve a better heat dissipation effect, thereby reducing the overall temperature of the spindle box and extending its service life. Through this cyclic heat dissipation structure, the spindle box of this invention solves the problem of the spindle box overheating due to prolonged saw blade operation in traditional technology.

[0022] Furthermore, the diameter of the driving gear is smaller than that of the driven gear, and the driving gear is located above the driven gear. This arrangement facilitates improved heat dissipation within the spindle housing during stone cutting, thereby extending its service life.

[0023] Furthermore, the transmission of the drive gear and rack of the transverse drive motor drives the two sets of transverse slide blocks to slide on the transverse slide rail. This not only makes the two sets of transverse slide blocks move synchronously, but also ensures that the middle frame assembly moves more smoothly and steadily. This, in turn, drives the saw blade coupling assembly to move horizontally and smoothly to cut the stone, resulting in a flatter cut surface and higher cutting efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the all-steel double-beam large cutting machine of the present invention.

[0025] Figure 2 This is a partial structural schematic diagram of the all-steel double-beam large cutting machine of the present invention from another perspective.

[0026] Figure 3 This is a structural diagram showing the partial disassembly of the crossbeam in the all-steel double-beam large cutting machine of the present invention.

[0027] Figure 4 This is an exploded structural diagram of the spindle box assembly in the all-steel double-beam large cutting machine of the present invention.

[0028] Figure 5 This is a cross-sectional structural schematic diagram of the spindle box assembly in the all-steel double-beam large cutting machine of the present invention.

[0029] In the picture:

[0030] 1-Crossbeam; 10-Edge beam;

[0031] 11-First beam; 12-Second beam;

[0032] 13-Reinforcing tube; 14-Slide rail mounting base;

[0033] 15-Rack and pinion mounting base; 131-First reinforcing tube;

[0034] 132 - Second reinforcing tube; 2 - Middle frame assembly;

[0035] 20 - Longitudinal movement mechanism; 3 - Lateral movement mechanism;

[0036] 31-Transverse slide rail; 32-Transverse slide block;

[0037] 33-Rack and pinion; 34-Transverse drive motor;

[0038] 35 - Drive gear; 4 - Saw blade coupling assembly;

[0039] 40 - Saw blade; 41 - Spindle box assembly;

[0040] 42-Saw blade drive mechanism; 411-Spindle housing;

[0041] 412 - Oil filling hole; 413 - Observation window;

[0042] 414 - Saw blade spindle; 415 - Drive shaft;

[0043] 416 - First enclosure; 417 - Second enclosure;

[0044] 418 - Bearing housing; 419 - Cooling oil passage;

[0045] 421 - Saw blade drive motor; 422 - Drive wheel;

[0046] 423 - Driven gear; 4141 - Driven gear;

[0047] 4151 - Drive gear; 4161 - First support step;

[0048] 4162 - First upper cover plate; 4163 - Exhaust vent;

[0049] 4171 - Second supporting step; 4172 - Second upper cover plate;

[0050] 4191 - Oil inlet channel; 4192 - Oil outlet channel;

[0051] 4193 - Circulating oil hole; 5 - Lifting mechanism;

[0052] 51-Guide column; 52-Lifting drive mechanism;

[0053] 53-Mounting plate; 54-Fixing plate. Detailed Implementation

[0054] 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.

[0055] like Figures 1 to 5 As shown, the all-steel double-beam large cutting machine includes two longitudinally spaced side beams 10, a crossbeam 1 longitudinally movable between the two side beams 10, a middle frame assembly 2 sleeved on the crossbeam 1, a lateral movement mechanism 3 for driving the middle frame assembly 2 to move laterally, a saw blade coupling assembly 4 fixed to the crossbeam 1 via the middle frame assembly 2, and a lifting mechanism 5 mounted on the middle frame assembly 2 for driving the saw blade coupling assembly 4 to rise and fall. Specifically, the crossbeam 1 includes a second beam 12 and two parallel first beams 11, with the second beam 12 located between the two first beams 11, and the two first beams 11 connected by a... Multiple reinforcing tubes 13 are connected together, and the second beam 12 is erected above the reinforcing tubes 13. The two first beams 11 are connected by multiple reinforcing tubes 13 to form a whole crossbeam. Preferably, the spacing between the reinforcing tubes 13 is small and the distribution is relatively close. It should be noted that in this embodiment, a longitudinal movement mechanism 20 is provided between the bottom of the crossbeam 1 and the two side beams 10. The crossbeam 1 moves longitudinally between the two side beams 10 through the longitudinal movement mechanism 20. The longitudinal movement mechanism 20 in this invention adopts the structure of conventional longitudinal movement mechanisms in the art. As long as the above effect can be achieved, the specific structure will not be described in detail here.

[0056] The middle frame assembly 2 of the present invention has a cuboid structure, with a mounting groove for mounting the crossbeam 1 through its middle part. The middle frame assembly 2 is fitted onto the two first beams 11 through the mounting groove. The transverse movement mechanism 3 of the present invention includes transverse slide rails 31 respectively mounted on the two first beams 11, transverse slide blocks 32 slidably mounted on the transverse slide rails 31, a rack 33 mounted on the second beam 12, and a transverse drive motor 34 mounted on the middle frame assembly 2. The rack 33 and the two transverse slide rails 31 are arranged along the length direction of the crossbeam 1 and are parallel to each other. The two transverse slide rails 31 are both located at the top of the first beam 11, the rack 33 is located at the top of the second beam 12, and the transverse slide blocks 32 are fixed in the mounting groove of the middle frame assembly 2, corresponding to the two first beams 11 respectively. At the top of the beam 11, a transverse drive motor 34 is fixed to the middle frame assembly 2, and the output end of the transverse drive motor 34 is provided with a drive gear 35 that meshes with the rack 33. In use, the transverse drive motor 34 controls the drive gear 35 to rotate, so that the middle frame assembly 2 drives two sets of transverse slide blocks 32 to slide on the transverse slide rail 31 under the meshing action of the drive gear 35 and the rack 33, thereby realizing transverse movement on the beam 1. It should be noted that the transverse drive motor 34 in this invention preferably adopts a conventional differential transmission mechanism existing in the art. The differential transmission mechanism absorbs the resistance difference caused by the operation of the two transverse slide rails 31 during translation, so as to ensure the smooth, accurate and reliable movement of the middle frame assembly 2 and the saw blade coupling assembly 4.

[0057] The crossbeam 1 of this invention is composed of two first beams 11 connected by multiple reinforcing tubes 13 to form a whole crossbeam. The spacing between the reinforcing tubes 13 is small and their distribution is relatively dense, resulting in a more stable structure. When the crossbeam 1 needs to be lengthened or widened, the multiple reinforcing tubes 13 can improve the structural strength and load-bearing capacity of the crossbeam 1, while reducing its overall weight. This saves manufacturing costs and also prevents the crossbeam 1 from losing its structural strength and load-bearing capacity due to increased weight and size. The two first beams 11 are connected together to distribute the force. The force on the first beam 11 closer to the saw blade coupling assembly 4 can be distributed to the first beam 11 farther away from the saw blade coupling assembly 4, making the force on the two first beams 11 more balanced, further improving the overall structural strength and load-bearing capacity of the crossbeam 1. The middle section of this invention... The frame assembly 2 is integrally cast, resulting in stronger structure and more balanced stress distribution. The middle frame assembly 2 moves smoothly on the crossbeam 1, driving the saw blade coupling assembly 4 to move smoothly and cut the stone, resulting in better cutting stability. Moreover, through the transmission of the drive gear 35 and rack 33 of the transverse drive motor 34, two sets of transverse slide blocks 32 slide on the transverse slide rail 31, ensuring that the two sets of transverse slide blocks 32 move synchronously and that the middle frame assembly 2 moves more smoothly and steadily. This, in turn, drives the saw blade coupling assembly 4 to move horizontally and smoothly to cut the stone, resulting in a flatter cut surface and higher cutting efficiency. Furthermore, the coupling assembly 4 of this invention can be equipped with 26-32 saw blades, and the crossbeam 1 of this invention can bear the weight of the saw blade coupling assembly 4, exhibiting strong load-bearing capacity.

[0058] Furthermore, each of the two first beams 11 is provided with a slide rail mounting seat 14 for mounting the transverse slide rail 31, and the second beam 12 is provided with a rack mounting seat 15 for mounting the rack 33. This arrangement makes the structure of the middle frame assembly 2 and the crossbeam 1 more stable in horizontal movement and improves the overall cutting performance. The reinforcing tube 13 of the present invention is a square tube, which can strengthen the structural strength and load-bearing capacity of the crossbeam 1. Preferably, the reinforcing tube 13 of the present invention includes a first reinforcing tube 131 and a second reinforcing tube 132. The first reinforcing tube 131 is located above the second reinforcing tube 132. The size of the first reinforcing tube 131 is smaller than the size of the second reinforcing tube 132. The first reinforcing tube 131 can be used to support the second beam 12. Correspondingly, the second beam 12 is located on top of the first reinforcing tube 131. Dividing the reinforcing tube 13 into reinforcing tubes 13 of different sizes can save costs during manufacturing.

[0059] The saw blade coupling assembly 4 of the present invention includes a spindle box assembly 41, a saw blade 40 connected to the output end of the spindle box assembly 41, and a saw blade drive mechanism 42 connected to the input end of the spindle box assembly 41. Specifically, the spindle box assembly 41 includes a spindle box body 411. The side wall of the spindle box body 411 has an oil injection hole 412 communicating with its interior and an observation window 413 for observing the internal liquid level. The side wall of the spindle box body 411 at its output end has an output shaft hole, in which a saw blade spindle 414 is rotatably connected. The saw blade spindle 414 is rotatably mounted on the spindle box body 411 and extends out of the output shaft hole. The saw blade 40 is mounted on the end of the saw blade spindle 414 away from the spindle box body 411. The side wall of the spindle box body 411 at its input end has an input shaft hole, in which a drive shaft 415 is rotatably connected. The drive shaft 415 is rotatably mounted on the spindle housing 411 and extends out from the input shaft hole. The end of the drive shaft 415 away from the spindle housing 411 is connected to the saw blade drive mechanism 42. The drive shaft 415 located in the spindle housing 411 is connected to the saw blade spindle 414. The saw blade drive mechanism 42 of the present invention includes a saw blade drive motor 421 and a belt pulley drive mechanism disposed at the output end of the saw blade drive motor 421. Specifically, the belt pulley drive mechanism includes a drive wheel 422 disposed at the output end of the saw blade drive motor 421 and a driven wheel 423 disposed at the end of the drive shaft 415 away from the spindle housing 411, and a belt (not shown in the figure) for connecting the drive wheel 422 and the driven wheel 423. The saw blade drive motor 421 is connected to the end of the drive shaft 415 away from the spindle housing 411 through the belt pulley drive mechanism.

[0060] like Figures 4 to 5As shown, the spindle housing 411 of the present invention includes a first housing 416 and a second housing 417 arranged at intervals along the length direction of the spindle housing 411. Specifically, the first housing 416 and the second housing 417 are separated by a partition. The upper part of the partition has a through hole, and the lower part of the partition has a mounting hole for the saw blade spindle 411 to pass through. The saw blade spindle 411 passes through the mounting hole and extends into the second housing 417 and is connected to the drive shaft 415 for transmission. The through hole can facilitate the circulation of gas between the first housing 416 and the second housing 417. The first housing 416 is located at the end near the output shaft hole. The first housing 416 has a bearing seat 418 for mounting the saw blade spindle 414 at the position corresponding to the output shaft hole. On both sides of the spindle housing 411, corresponding to the bearing seat 418, there are heat dissipation oil channels 419 that connect to the output shaft hole. The heat dissipation oil channels 419 are respectively located in the side walls on both sides of the spindle housing 411. The inlet of the heat dissipation oil channel 419 is located in the lower part of the first housing 416, and the outlet of the heat dissipation oil channel 419 is located in the upper part of the bearing seat 418. Specifically, the heat dissipation oil channel 419 includes an oil inlet channel 4191 and an oil outlet channel 4192 connected end to end. The oil inlet channel 4191 is arranged horizontally and its inlet is located in the lower part of the first housing 416. The oil outlet channel 4192 is arranged vertically and its outlet is located in the upper part of the bearing seat 418. A circulation oil hole 4193 connecting to the output shaft hole is opened in the middle of the oil outlet channel 4192. The diameter of the oil inlet channel 4191 is larger than the diameter of the oil outlet channel 4192.

[0061] Furthermore, the first housing 416 has a first opening at its top, and the second housing 417 has a second opening at its top. The first housing 416 also includes a first upper cover plate 4162 for covering the first opening, and the second housing 417 also includes a second upper cover plate 4172 for covering the second opening. A first support step 4161 for supporting the first upper cover plate 4162 is formed on the inner side of the first housing 416 corresponding to the position of the first opening, and a second support step 4171 for supporting the second upper cover plate 4172 is formed on the inner side of the second housing 417 corresponding to the position of the second opening. Preferably, the top of the first housing 416 is also provided with an exhaust groove 4163 communicating with the first opening, and the bottom of the exhaust groove 4163 is provided with a through exhaust port communicating with the outside of the spindle housing 411. The first upper cover plate 4162 is placed after the first opening, and the horizontal position of the top surface of the first upper cover plate 4162 is lower than the horizontal position of the top surface of the first housing 416.

[0062] Before normal operation, a certain amount of lubricating oil needs to be injected into the first housing 416, covering the saw blade spindle 414. The oil inlet channel 4191 is always located below the oil level in the first housing 416. When the saw blade spindle 414 rotates at high speed, causing the oil temperature in the first housing 416 to become too high, the density of the lubricating oil at high temperature will decrease, thus increasing its temperature. This causes the excessively hot lubricating oil in the output shaft hole to be squeezed from the circulation oil hole 4193 into the oil outlet channel 4192. The excessively hot lubricating oil in the first housing 416 will also be squeezed from the oil inlet channel 4191 into the oil outlet channel 4192, and then flow out from the outlet of the oil outlet channel 4192 to exchange heat with the air above the bearing seat 418, transferring heat to the air above the oil. After the oil and air exchange heat... The lubricating oil in the first housing 416 is then recirculated, allowing its temperature to remain relatively stable. Heat from the air above the oil is exchanged with the outside air through the exhaust vent 4163, and also with the air in the second housing 417 through the through-holes in the partition, thus lowering the temperature inside the second housing 417. This continuous heat exchange cycle keeps the lubricating oil in the spindle housing 411 at a relatively low and stable temperature, enabling the spindle housing 411 of this invention to achieve better heat dissipation, thereby reducing the overall temperature of the spindle housing 411 and extending its service life. Through this cyclical heat dissipation structure, the spindle housing 411 of this invention solves the problem of overheating caused by prolonged operation of the saw blade 40 in traditional technologies.

[0063] Furthermore, due to thermal expansion and contraction and oil and gas circulation, water vapor will be generated inside the first housing 416 and condense on the first upper cover plate 4162. The exhaust groove 4163 can also play the role of removing water vapor. Since the horizontal position of the top surface of the first upper cover plate 4162 is lower than the horizontal position of the top surface of the first housing 416, the water vapor on the top surface of the first upper cover plate 4162 will flow out from the exhaust port first.

[0064] Preferably, a drive gear 4151 is fixedly mounted on the drive shaft 415, and a driven gear 4141 meshing with the drive gear 4151 is fixedly mounted on the saw blade spindle 414. The drive shaft 415 and the saw blade spindle 414 are connected by the drive gear 4151 and the driven gear 4141. Both the drive gear 4151 and the driven gear 4141 are located inside the second housing 417. Preferably, in this invention, the diameter of the drive gear 4151 is smaller than the diameter of the driven gear 4141, and the drive gear 4151 is located above the driven gear 4141. This arrangement facilitates improved heat dissipation within the second housing 417 during stone cutting. Specifically, before normal operation, a certain amount of lubricating oil needs to be injected into the first housing 416 and the second housing 417. When lubricating oil is injected into the second housing 417... This ensures that the oil level in the second housing 417 is not higher than the height of the driven gear 4141. Since the saw blade drive motor 421 drives the drive gear 4151 to rotate at high speed, it easily generates a lot of heat. The driven gear 4141, located below, is larger than the drive gear 4151, giving it a certain speed difference ratio with the drive gear 4151. Therefore, it rotates relatively slowly and generates relatively less heat. By placing the drive gear 4151 above the driven gear 4141 and ensuring that the oil level is not higher than the height of the driven gear 4141, it is possible to effectively prevent the heat generated by the high-speed rotation of the drive gear 4151 from being absorbed by the oil too quickly, thus preventing the oil temperature in the spindle housing 411 from rising too rapidly. This slows down the overall temperature rise of the spindle housing 411 and further extends its service life.

[0065] like Figures 1 to 2As shown, the lifting mechanism 5 of the present invention includes guide posts 51 respectively disposed at the four corners of the middle frame assembly 2 and a lifting drive mechanism 52 for driving the guide posts 51 to rise and fall. Specifically, the four corners of the middle frame assembly 2 are provided with guide post holes for the guide posts 51 to pass through on the outer side of the crossbeam 1. Each guide post hole is vertically arranged, and the guide posts 51 pass through the four guide post holes one by one. The guide post holes guide the guide posts 51. The upper ends of the four guide posts 51 are mounted together on a mounting plate 53, and the lower ends of the four guide posts 51 are mounted together on a fixing plate 54. The spindle box assembly 41 and the saw blade 40 are fixed on the fixing plate 54 and located at the bottom of the fixing plate 54. The lifting drive mechanism 52... Both the saw blade drive motor 421 and the lifting drive mechanism 52 are fixed on the mounting plate 53. Specifically, in this embodiment, the lifting drive mechanism 52 includes two lifting cylinders fixed on the mounting plate 53. The lifting cylinders are arranged vertically, with one end fixed on the mounting plate 53 and the other end fixed on the middle frame assembly 2. Driven by the lifting cylinders, the mounting plate 53 is moved up and down, and the main spindle box assembly 41 at the bottom of the fixed plate 54 and the saw blade 40 are moved up and down through four guide columns 51, so that the saw blade 40 can cut the stone longitudinally. It should be noted that the lifting mechanism 5 in this embodiment can also adopt other conventional lifting structures in the art, as long as they can achieve the above-mentioned effects.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-beam all-steel large cutting machine, comprising two longitudinally spaced side beams, a crossbeam longitudinally movably mounted between the two side beams, a middle frame assembly sleeved on the crossbeam, a traversing mechanism for driving the middle frame assembly to move laterally, a saw blade spindle assembly fixed to the crossbeam via the middle frame assembly, and a lifting mechanism mounted on the middle frame assembly for driving the saw blade spindle assembly to rise and fall, characterized in that: The crossbeam includes a second beam and two parallel first beams, which are connected together by a plurality of reinforcing tubes. The second beam is mounted on top of the reinforcing tubes. The saw blade spindle assembly includes a spindle box assembly, a saw blade connected to the output end of the spindle box assembly, and a saw blade drive mechanism connected to the input end of the spindle box assembly. The spindle box assembly includes a spindle box body. An output shaft hole is formed on the side wall of the spindle box body at its output end, and a saw blade spindle is rotatably connected within the output shaft hole. An input shaft hole is formed on the side wall of the spindle box body at its input end, and a drive shaft is rotatably connected within the input shaft hole. The drive shaft and the saw blade spindle are drively connected. The spindle box body includes a first housing and a second housing arranged at intervals along the length of the spindle box body. The first housing is located near the end of the output shaft hole. A bearing seat for mounting the saw blade spindle is provided in the first housing corresponding to the position of the output shaft hole. Bearing seats for mounting the saw blade spindle are provided on both sides of the spindle box body corresponding to the position of the output shaft hole. Each bearing housing is provided with a cooling oil passage that connects to the output shaft hole. The cooling oil passages are respectively located inside the side walls on both sides of the spindle housing. The inlet of the cooling oil passage is located at the bottom of the first housing, and the outlet of the cooling oil passage is located at the top of the bearing housing. The cooling oil passage includes an oil inlet channel and an oil outlet channel that are connected to each other. The oil inlet channel is arranged horizontally and its inlet is located at the bottom of the first housing. The oil outlet channel is arranged vertically and its outlet is located at the top of the bearing housing. A circulating oil hole that connects to the output shaft hole is opened in the middle of the oil outlet channel. The diameter of the oil inlet channel is larger than the diameter of the oil outlet channel.

2. The all-steel double-beam large cutting machine according to claim 1, characterized in that, A drive gear is fixed on the drive shaft, and a driven gear that meshes with the drive gear is fixed on the saw blade spindle. The drive shaft and the saw blade spindle are connected by transmission through the drive gear and the driven gear. Both the drive gear and the driven gear are located in the second housing. The diameter of the drive gear is smaller than the diameter of the driven gear, and the drive gear is located above the driven gear.

3. The all-steel double-beam large cutting machine according to claim 1, characterized in that, The first box has a first opening at the top, and the second box has a second opening at the top. The first box also includes a first upper cover plate for covering the first opening, and the second box also includes a second upper cover plate for covering the second opening. The inner side of the first box is provided with a first support plate for supporting the first upper cover plate at the position corresponding to the first opening, and the inner side of the second box is provided with a second support plate for supporting the second upper cover plate at the position corresponding to the second opening.

4. The all-steel double-beam large cutting machine according to claim 3, characterized in that, The top of the first housing is also provided with an exhaust groove that connects to the first opening. An exhaust port is provided at the bottom of the exhaust groove. The first upper cover is placed after the first opening, and the horizontal position of the top surface of the first upper cover is lower than the horizontal position of the top surface of the first housing.

5. The all-steel double-beam large cutting machine according to claim 1, characterized in that, The lateral movement mechanism includes lateral slide rails respectively disposed on the two first beams, lateral slide blocks slidably disposed on the lateral slide rails, a rack disposed on the second beam, and a lateral drive motor disposed on the middle frame assembly. The rack and the two lateral slide rails are arranged along the length direction of the beam and are parallel to each other. The lateral slide blocks are fixedly disposed on the middle frame assembly. The output end of the lateral drive motor is provided with a drive gear that meshes with the rack.

6. The all-steel double-beam large cutting machine according to claim 5, characterized in that, Each of the two first beams is provided with a slide rail mounting seat for mounting the transverse slide rail, and the second beam is provided with a rack mounting seat for mounting the rack.

7. The all-steel double-beam large cutting machine according to claim 1, characterized in that, The reinforcing tube includes a first reinforcing tube and a second reinforcing tube, with the first reinforcing tube located above the second reinforcing tube and the second beam located on top of the first reinforcing tube.

8. The all-steel double-beam large cutting machine according to claim 1, characterized in that, The lifting mechanism includes guide columns respectively disposed at the four corners of the middle frame assembly and a lifting drive mechanism for driving the guide columns to rise and fall. The four corners of the middle frame assembly are provided with guide column holes for the guide columns to pass through on the outer side of the crossbeam. The guide column holes are arranged vertically, and the guide columns pass through the four guide column holes one by one. The upper ends of the four guide columns are mounted together on a mounting plate, and the lower ends of the four guide columns are mounted together on a fixing plate. The saw blade spindle assembly is fixed to the bottom of the fixing plate.

9. The all-steel double-beam large cutting machine according to claim 1, characterized in that, The saw blade drive mechanism includes a saw blade drive motor and a pulley transmission mechanism disposed at the output end of the saw blade drive motor. The saw blade drive motor is connected to the input end of the spindle box assembly through the pulley transmission mechanism.

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