Machine tool hydrostatic guideway linear motor feeding device

Abstract

The invention relates to the technical field of linear motors, and discloses a machine tool hydrostatic guideway linear motor feeding device which comprises a main rail, side rails are fixedly connected to the left side and the right side of the main rail, rail grooves are formed between the side rails and the main rail, and permanent magnet blocks are fixedly connected to the upper surface of the main rail. The inner side of the rail groove is slidably connected with an emergency stop limiting mechanism, the emergency stop limiting mechanism comprises a movable pedestal, an inner air groove is formed in the movable pedestal, the inner side of the inner air groove is slidably connected with an inner groove baffle, the middle of the bottom surface of the inner groove baffle is fixedly connected with a threaded column, and the outer side of the bottom end of the threaded column is provided with a rotating handle; according to the stepless locking device, the limiting clamping rod is controlled by controlling air pressure air supply to achieve stepless locking of the main rail, rapid locking can be achieved when the movable pedestal moves and suddenly stops, and the situation that the displacement precision is affected due to the fact that the movable pedestal cannot immediately stop suddenly due to inertia in the moving process is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of linear motors, in particular to a hydrostatic guide rail linear motor feeding device for a machine tool. Background Art

[0002] The hydrostatic guideway linear motor feed device for machine tools is a high-precision, high-performance machine tool feed system that combines hydrostatic guideway technology and linear motor drive technology. It is widely used in ultra-precision machining, CNC machine tools and other fields. This device represents the technological pinnacle of high-end machine tool feed systems. Through the synergistic effect of hydrostatic guideways and linear motors, it achieves accuracy, speed and reliability that cannot be matched by traditional mechanical transmission. It is one of the key technologies in the field of precision manufacturing.

[0003] Patent publication number CN201361796Y discloses a hydrostatic guideway linear motor feed device for machine tools, comprising an upper pad and a lower pad, with a hydrostatic guideway sliding between the upper and lower pads. A linear motor primary coil is mounted on the lower pad between two cylindrical hydrostatic guideways, and a linear motor secondary coil corresponding to the linear motor primary coil is mounted on the upper pad, or a linear motor secondary coil is mounted on the lower pad between two cylindrical hydrostatic guideways, and a linear motor primary coil corresponding to the linear motor secondary coil is mounted on the upper pad. A grating scanning unit, a grating scale, and an inductive sensor are used between the upper and lower pads for precise feeding and positioning control. This patented device is a hydrostatic guideway linear motor feed device for machine tools with a simple structure, no mechanical transmission, high feed accuracy, no wear, high rigidity, and high sensitivity. However, this patent also has the problem that inertia cannot stop immediately during an emergency stop, affecting sliding accuracy. Therefore, a hydrostatic guideway linear motor feed device for machine tools is proposed to address the above-mentioned problem. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a machine tool hydrostatic guide rail linear motor feed device in response to the above-mentioned deficiencies in the prior art.

[0005] To solve the above technical problems, the present invention adopts the following technical solution: a hydrostatic guide rail linear motor feed device for a machine tool, comprising a main rail, side rails fixedly connected to the left and right sides of the main rail, a rail groove defined between the side rails and the main rail, a permanent magnet fixedly connected to the upper surface of the main rail, and an emergency stop limit mechanism slidably connected to the inner side of the rail groove;

[0006] According to the above technical solution, the emergency stop limit mechanism includes a movable base, an inner air groove is opened inside the movable base, the inner side of the inner air groove is slidably connected to the inner groove baffle, the middle part of the bottom surface of the inner groove baffle is fixedly connected to a threaded column, a turning handle is provided on the outer side of the bottom end of the threaded column, a protrusion is extended outward from the outer edge of the turning handle, two limiting rods are provided on the front and rear sides of the turning handle, the outer side of the limiting rod is slidably connected to a sliding rod block, a reset spring is provided on the bottom surface of each limiting rod, the top surface of the turning handle is fixedly connected to a slot block, and the inner top and bottom surfaces of the inner air groove are respectively provided with an upper air port and a lower air port.

[0007] According to the above technical solution, an active cooling mechanism is provided on the top surface of the emergency stop limit mechanism, and a speed reduction buffer mechanism is provided on the left side of the active cooling mechanism.

[0008] According to the above technical solution, a central transverse groove is opened inside the main rail, the movable base is slidably connected to the rail groove, the turning handle is rotatably connected to the inside of the inner groove baffle, the slide block is fixedly connected to the movable base, the two ends of the return spring are respectively fixedly connected to the limit card rod and the slide block, the groove block is slidably connected to the threaded outer side of the threaded column, the top surface of the inner groove baffle is provided with an elastic spring, and the two ends of the elastic spring are respectively fixedly connected to the inner groove baffle and the movable base, the upper air port is located at On the upper surface of the main rail, the lower air port is located on the inner side of the central transverse groove of the main rail. When gas is injected into the interior of the movable base, the increase in ventilation gas causes the air pressure to increase, pushing the inner groove baffle to move upward and squeezing the elastic spring to contract. At this time, the inner groove baffle moves upward along the inner side of the inner gas groove away from the upper air port and the lower air port. When the upper air port and the lower air port are not blocked, the gas inside the inner gas groove will be ejected from the upper air port and the lower air port, so that the ejected gas ejects gas to the top surface of the main rail and the inner side of the central transverse groove, and the ejected gas is ejected. An air film is formed between the moving platform and the main rail, thereby reducing the friction during the movement of the moving platform. By reducing the friction between parts, the efficiency of converting electrical energy into kinetic energy is improved, the energy conversion loss is reduced, the wear of parts is reduced, and the service life of parts is increased. In addition, when the moving platform stops moving and the air supply inside the moving platform stops, the inner groove baffle will push the inner groove baffle to block the upper air port and the lower air port under the action of the elastic spring. The moving platform will move downward and the groove block will slide along the threaded groove on the outside of the threaded column, so that the groove block drives the connected turning handle to rotate. When the turning handle rotates, the turning handle pushes the limit rod to slide along the slide rod block through the connected protrusion and squeeze the return spring, so that the limit rod passes through the outside of the moving platform and contacts the bottom surface of the main rail. By controlling the air pressure supply to control the limit rod, stepless locking of the main rail is achieved, which can be quickly locked when the moving platform stops suddenly, avoiding the displacement accuracy affected by the inertia of the moving platform. The displacement accuracy of the motor linear feeding is improved.

[0009] According to the above technical solution, the active cooling mechanism includes a mounting plate, the right side of the mounting plate is fixedly connected to a connecting pipe, the end of the connecting pipe away from the mounting plate is fixedly connected to a valve body, the front side of the valve body is fixedly connected to an air supply port, the interior of the valve body is slidably connected to a valve block, the interior of the valve body is provided with an inner arc channel, the front top of the valve body is provided with an upper hole, the left and right bottom surfaces of the mounting plate are provided with air gathering grooves, and the bottom surface between the two air gathering grooves is provided with a plurality of branch air grooves, the bottom surface of the mounting plate is opened and closed with a mounting groove, and the top of the valve block is provided with an electromagnet.

[0010] According to the above technical solution, the mounting plate is installed on the top surface of the movable pedestal, a center hole is opened in the middle position of the front side of the valve block, and the air supply port is connected with the inside of the movable pedestal through the center hole, the upper hole is connected with the inside of the inner arc channel, the branch air groove is connected with the air gathering groove, and the air gathering groove on the right side is connected with the connecting pipe, and a linear motor is fixedly connected to the inner side of the mounting groove, and the electromagnet is fixedly connected to the movable pedestal. When the movable pedestal needs to stop moving, the built-in electromagnetic part of the linear motor switches the magnetic poles and the permanent magnet block to generate suction to make the movable pedestal move. After stopping the movement, the linear motor is temporarily in a stopped working state. At this time, the electromagnet connected to the movable pedestal is in a power-off state together with the linear motor. After the electromagnet is powered off, the magnetic force disappears, and the adsorbed valve block will be When the valve block slides downward under the action of gravity and the side block connected to the valve block prevents the valve block from continuing to fall, the upper hole on the side of the valve block is aligned with the air supply port, and the gas injection into the mobile base stops. The gas will enter the upper hole through the air supply port, and then enter the connecting pipe through the upper hole. The gas enters the gas gathering tank through the connecting pipe, and is then dispersed into the branch gas tank by the gas gathering tank, so that the gas passes directly over the linear motor. When the linear motor stops moving, it stops supplying power to save electricity, and the valve block is automatically switched to connect with the connecting pipe through the electromagnet power-off control. If the linear motor loses power due to a fault, the connecting pipe is automatically switched to dissipate heat to avoid overheating damage. There is no need for independent temperature control sensors and controllers. The electromagnetic components of the motor itself are directly used to trigger the gas path switching, reducing hardware complexity.

[0011] According to the above technical solution, the deceleration buffer mechanism includes a buffer end shell, the middle part of the inner wall of the buffer end shell is fixedly connected with an exhaust hole, the outer side of the exhaust hole is provided with an air groove end, the interior of the air groove end is slidingly connected with a lower air block, the bottom end of the lower air block is fixedly connected with a resistance bar, the front and rear sides of the air groove end are fixedly connected with a ventilation pipe, and the interior of the ventilation pipe is slidingly connected with an air push pipe.

[0012] According to the above technical solution, a leakage hole is opened on the outer surface of the air push tube, a gasket is fixedly connected to one end of the air push tube away from the ventilation tube, an inclined rod is fixedly connected to the upper surface of the resistance bar, and a short column is fixedly connected to the side of the gasket.

[0013] The cam is connected to the air duct by means of a spring, and the two ends of the spring are fixedly connected to the air duct and the resistance bar respectively. The front side of the cam is provided with a small hole that passes through the interior of the buffer end shell. When the gas in the air gathering groove on the left is discharged from the cam, the cam blows the lower air block downward along the air duct end. The downward movement of the lower air block drives the connected resistance bar to pull the spring plate into contact with the top surface of the side rail. When the lower air block moves downward, the remaining gas will enter the air duct through the interior of the air duct end. The air duct blows the air push pipe to push the gasket. When the air push pipe side When the air leakage hole on the surface slides out of the vent pipe, the remaining gas in the vent pipe directly enters the inside of the buffer end shell through the leakage hole, and sprays the gas out through the small hole of the gasket, so as to avoid the linear motor continuing to slide and collide due to inertia after power failure. The gasket is used to withstand the collision and the gasket is hit to push the push tube to shrink into the vent pipe. When the air leakage hole enters the vent pipe again, the continuously ejected gas will push the push tube to slide out of the vent pipe again. This reciprocating process can use the gasket to transfer the impact force through the sliding of the push tube, so as to avoid damage to the linear motor and fragile components due to impact. When the exhaust hole stops spraying, the spring sheet contracts and pulls the resistance bar. The resistance bar resets and drives the inclined rod to push the short column upward to reset the gasket.

[0014] The present invention adopts the above technical solution, which can bring the following beneficial effects:

[0015] The hydrostatic guide linear motor feed device of the machine tool realizes stepless locking of the main rail by controlling the air pressure supply to control the limit lever. It can quickly lock when the moving platform is in an emergency stop, avoiding the displacement accuracy affected by the inertia of the moving platform, thereby improving the displacement accuracy of the motor linear feeding.

[0016] The hydrostatic guide rail linear motor feed device of the machine tool stops supplying power to the linear motor when it stops moving, which saves electricity. The valve block is automatically switched to connect the air supply port to the connecting pipe through the power-off control of the electromagnet. If the linear motor loses power due to a fault, the connecting pipe is automatically switched to dissipate heat to avoid damage from overheating. There is no need for independent temperature control sensors and controllers, and the electromagnetic components of the motor itself are directly used to trigger the air path switching, reducing hardware complexity.

[0017] The hydrostatic guide linear motor feed device of this machine tool uses gaskets to transmit and consume the impact force through the push air pipe sliding, so as to avoid damage to the linear motor and fragile components due to impact. When the exhaust hole stops spraying, the spring sheet contracts and pulls the resistance bar. The resistance bar resets and drives the inclined rod to push the short column upward to reset the gasket. If the high-speed linear motor is stopped directly, it will bear a huge inertial force and accelerate mechanical wear. The buffer design disperses the impact force through flexible deceleration and suppresses the interference of vibration on precision components. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall front three-dimensional structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall rear-view stereoscopic structure of the present invention;

[0020] Figure 3 Schematic diagram of the structure of the emergency stop limit mechanism of the present invention;

[0021] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of A;

[0022] Figure 5 This is a schematic diagram of the threaded column connection structure of the present invention;

[0023] Figure 6 This is a structural diagram of the installation position of the upper air port of the present invention;

[0024] Figure 7 Schematic diagram of the structure of the active cooling mechanism of the present invention;

[0025] Figure 8 This is a schematic diagram of the valve body connection structure of the present invention;

[0026] Figure 9 It is a structural schematic diagram of the speed reduction buffer mechanism of the present invention.

[0027] Figure: 1, side rail; 2, main rail; 3, permanent magnet block; 4, rail groove; 5, emergency stop limit mechanism; 51, moving base; 52, inner groove baffle; 53, turning handle; 54, bump; 55, threaded column; 56, limit rod; 57, slide block; 58, return spring; 59, chute block; 510, inner air groove; 511, upper air port; 512, lower air port; 6, active cooling mechanism; 61, mounting plate; 62, connecting pipe; 63, valve body; 64 , valve block; 65, side block; 66, inner arc channel; 67, upper hole; 68, air supply port; 69, air collecting groove; 610, branch air groove; 611, mounting groove; 612, electromagnet; 7, speed reduction buffer mechanism; 71, buffer end shell; 72, exhaust hole; 73, air groove end; 74, lower air block; 75, vent pipe; 76, air push pipe; 77, air leakage hole; 78, gasket; 79, resistance bar; 710, inclined rod; 711, short column; 8, linear motor. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-9 One embodiment of the present invention is: a hydrostatic guide rail linear motor feed device for a machine tool, comprising a main rail 2, side rails 1 fixedly connected to both left and right sides of the main rail 2, a rail groove 4 defined between the side rails 1 and the main rail 2, a permanent magnet 3 fixedly connected to the upper surface of the main rail 2, an emergency stop limit mechanism 5 slidably connected to the inner side of the rail groove 4;

[0030] The emergency stop limit mechanism 5 includes a movable base 51, and an inner air groove 510 is opened inside the movable base 51. The inner side of the inner air groove 510 is slidably connected to the inner groove baffle 52, and the middle part of the bottom surface of the inner groove baffle 52 is fixedly connected to a threaded column 55. A turning handle 53 is provided on the outer side of the bottom end of the threaded column 55, and a protrusion 54 extends outward from the outer edge of the turning handle 53. Two limiting rods 56 are provided on the front and rear sides of the turning handle 53, and a sliding block 57 is slidably connected to the outer side of the limiting rod 56. A reset spring 58 is provided on the bottom surface of each limiting rod 56, and a groove block 59 is fixedly connected to the top surface of the turning handle 53. The inner top and bottom surfaces of the inner air groove 510 are respectively provided with an upper air port 511 and a lower air port 512.

[0031] An active cooling mechanism 6 is provided on the top surface of the emergency stop limit mechanism 5 , and a speed reduction buffer mechanism 7 is provided on the left side of the active cooling mechanism 6 .

[0032] A central transverse groove is provided inside the main rail 2, the movable base 51 is slidably connected to the rail groove 4, the turning handle 53 is rotatably connected to the inner groove baffle 52, the slide block 57 is fixedly connected to the movable base 51, the two ends of the return spring 58 are respectively fixedly connected to the limit card rod 56 and the slide block 57, the groove block 59 is slidably connected to the threaded outer side of the threaded column 55, the top surface of the inner groove baffle 52 is provided with an elastic spring, and the two ends of the elastic spring are respectively fixedly connected to the inner groove baffle 52 and the movable base 51, the upper air port 511 is located on the upper surface of the main rail 2, and the lower air port 512 is located on the upper surface of the main rail 2. When gas is injected into the inner side of the central transverse groove of the main rail 2, the ventilation gas increases, causing the gas pressure to increase, pushing the inner groove baffle 52 to move upward and squeezing the elastic spring to contract. At this time, the inner groove baffle 52 moves upward along the inner side of the inner gas groove 510, away from the upper gas port 511 and the lower gas port 512. When the upper gas port 511 and the lower gas port 512 are not blocked, the gas inside the inner gas groove 510 will be ejected from the upper gas port 511 and the lower gas port 512, so that the ejected gas will be ejected to the top surface of the main rail 2 and the inner side of the central transverse groove, and the ejected gas will be ejected on the movable base 51. An air film is formed between the movable base 51 and the main rail 2, thereby reducing the friction during the movement of the movable base 51. By reducing the friction between the parts, the efficiency of converting electrical energy into kinetic energy is improved, the energy conversion loss is reduced, the wear of the parts is reduced, and the service life of the parts is increased. In addition, when the movable base 51 stops moving and the air supply inside the movable base 51 stops, the inner groove baffle 52 will push the inner groove baffle 52 under the action of the elastic spring to block the upper air port 511 and the lower air port 512, and the movable base 51 moves downward along the groove block 59, so that the groove block 59 follows the screw on the outer side of the threaded column 55. The groove slides, allowing the groove block 59 to drive the connected turning handle 53 to rotate. When the turning handle 53 rotates, the turning handle 53 pushes the limit card rod 56 to slide along the slide block 57 through the connected protrusion 54 and squeezes the return spring 58, allowing the limit card rod 56 to pass through the outside of the moving platform 51 and contact the bottom surface of the main rail 2. By controlling the air pressure supply to control the limit card rod 56, the main rail 2 can be steplessly locked. The moving platform 51 can be quickly locked when it stops suddenly, avoiding the movement of the moving platform 51. The displacement accuracy is affected by the inertia and the displacement accuracy of the motor linear feeding is improved.

[0033] The active cooling mechanism 6 includes a mounting plate 61, and a connecting pipe 62 is fixedly connected to the right side of the mounting plate 61. The end of the connecting pipe 62 away from the mounting plate 61 is fixedly connected to the valve body 63, and the front side of the valve body 63 is fixedly connected to the air supply port 68. The interior of the valve body 63 is slidably connected to the valve block 64, and the interior of the valve body 63 is provided with an inner arc channel 66. The front top of the valve body 63 is provided with an upper hole 67. The left and right bottom surfaces of the mounting plate 61 are provided with air gathering grooves 69, and the bottom surface between the two air gathering grooves 69 is provided with multiple branch air grooves 610. The bottom surface of the mounting plate 61 is opened and closed with a mounting groove 611, and the top of the valve block 64 is provided with an electromagnet 612.

[0034] The mounting plate 61 is mounted on the top surface of the movable base 51, and a center hole is provided in the middle position of the front side of the valve block 64, and the air supply port 68 is communicated with the inside of the movable base 51 through the center hole, the upper hole 67 is connected to the inside of the inner arc channel 66, the branch air groove 610 is connected to the air gathering groove 69, and the air gathering groove 69 on the right is connected to the connecting pipe 62. A linear motor 8 is fixedly connected to the inner side of the mounting groove 611, and the electromagnet 612 is fixedly connected to the movable base 51. When the movable base 51 needs to stop moving, the built-in electromagnetic part of the linear motor 8 switches the magnetic poles and the permanent magnet block 3 to generate suction to make the movable base 51 move. After stopping the movement, the linear motor 8 is temporarily in a stopped working state. At this time, the electromagnet 612 connected to the movable base 51 is in a power-off state together with the linear motor 8. After the electromagnet 612 is powered off, the magnetic force disappears, and the adsorbed valve block 64 will follow the valve body 6 under the action of gravity. 3 slides downward, and the side block 65 connected to the valve block 64 prevents the valve block 64 from continuing to fall. At this time, the upper hole 67 on the side of the valve block 64 is aligned with the air supply port 68, and the gas injection into the movable base 51 stops. The gas will enter the upper hole 67 through the air supply port 68, and then enter the connecting pipe 62 through the upper hole 67. The gas enters the gas gathering groove 69 through the connecting pipe 62, and is then dispersed into the branch gas groove 610 by the gas gathering groove 69, so that the gas passes directly above the linear motor 8. When the linear motor 8 stops moving, the power supply is stopped to save energy, and the valve block 64 is automatically switched to connect with the air supply port 68 and the connecting pipe 62 by powering off the electromagnet 612. If the linear motor 8 loses power due to a fault, the connecting pipe 62 is automatically switched to connect for heat dissipation to avoid overheating damage. No independent temperature control sensor and controller are required, and the electromagnetic components of the motor itself are directly used to trigger the gas path switching, reducing hardware complexity.

[0035] The deceleration buffer mechanism 7 includes a buffer end shell 71, and the middle part of the inner wall of the buffer end shell 71 is fixedly connected with an exhaust hole 72. The outer side of the exhaust hole 72 is provided with an air groove end 73. The interior of the air groove end 73 is slidably connected with a lower air block 74. The bottom end of the lower air block 74 is fixedly connected with a resistance bar 79. The front and rear sides of the air groove end 73 are fixedly connected with a ventilation pipe 75, and the interior of the ventilation pipe 75 is slidably connected with an air push pipe 76.

[0036] An air leakage hole 77 is opened on the outer surface of the air pushing pipe 76 , and a gasket 78 is fixedly connected to one end of the air pushing pipe 76 away from the vent pipe 75 . An inclined rod 710 is fixedly connected to the upper surface of the resistance bar 79 , and a short column 711 is fixedly connected to the side of the gasket 78 .

[0037] The buffer end shell 71 is fixedly connected to the left side of the movable base 51, the exhaust hole 72 is connected to the air gathering groove 69 on the left side, the gasket 78 is slidably connected to the buffer end shell 71, a spring sheet is provided between the vent pipe 75 and the resistance bar 79, and the two ends of the spring sheet are fixedly connected to the vent pipe 75 and the resistance bar 79 respectively. The front side of the gasket 78 is provided with a small hole that passes through the interior of the buffer end shell 71. When the gas in the air gathering groove 69 on the left side is discharged from the exhaust hole 72, the exhaust hole 72 blows the lower air block 74 downward along the air groove end 73. The downward movement of the lower air block 74 drives the connected resistance bar 79 to pull the spring sheet into contact with the top surface of the side rail 1. After the lower air block 74 moves downward, the remaining gas will enter the vent pipe 75 through the inside of the air groove end 73. The vent pipe 75 blows the push pipe 76 to push the gasket 78. When the leakage hole 77 on the side of the push pipe 76 is opened, the gas When sliding out of the vent pipe 75, the remaining gas in the vent pipe 75 directly enters the interior of the buffer end shell 71 through the leakage hole 77, and the gas is ejected through the small hole of the gasket 78, thereby preventing the linear motor 8 from continuing to slide and causing collision due to inertia after a fault and power outage. The gasket 78 is used to withstand the collision and the gasket 78 is hit to push the push pipe 76 to shrink into the vent pipe 75. When the leakage hole 77 enters the vent pipe 75 again, the continuously ejected gas will push the push pipe 76 to slide out of the vent pipe 75 again. This reciprocating process can use the gasket 78 to transmit and consume the impact force through the sliding of the push pipe 76, thereby preventing the linear motor 8 and fragile components from being damaged by the impact. When the exhaust hole 72 stops ejecting, the spring sheet contracts and pulls the resistance bar 79. The resistance bar 79 is reset, driving the inclined rod 710 to push the short column 711 upward to reset the gasket 78.

[0038] Working principle: When gas is injected into the movable base 51, the increase of ventilation gas causes the air pressure to increase, pushing the inner groove baffle 52 to move upward and squeezing the elastic spring to contract. At this time, the inner groove baffle 52 moves upward along the inner side of the inner gas groove 510, away from the upper gas port 511 and the lower gas port 512. When the upper gas port 511 and the lower gas port 512 are not blocked, the gas inside the inner gas groove 510 will be ejected from the upper gas port 511 and the lower gas port 512, so that the ejected gas will spray gas onto the top surface of the main rail 2 and the inner side of the middle transverse groove. The ejected gas forms an air film between the movable base 51 and the main rail 2, thereby reducing the friction during the movement of the movable base 51. By reducing the friction between the parts, the efficiency of converting electrical energy into kinetic energy is improved, the energy conversion loss is reduced, the wear of the parts is reduced, and the service life of the parts is increased. In addition, when the movable base 51 stops moving, When the air supply inside the moving base 51 stops, the inner groove baffle 52 will push the inner groove baffle 52 under the action of the elastic spring to block the upper air port 511 and the lower air port 512, and the moving base 51 moves downward, so that the groove block 59 slides along the threaded groove on the outer side of the threaded column 55, thereby allowing the groove block 59 to drive the connected rotating handle 53 to rotate. When the rotating handle 53 rotates, the rotating handle 53 pushes the limit card rod 56 to slide along the slide block 57 through the connected protrusion 54 and squeezes the return spring 58, so that the limit card rod 56 passes through the outer side of the moving base 51 and contacts the bottom surface of the main rail 2. By controlling the air pressure supply to control the limit card rod 56, the main rail 2 is infinitely locked, and the moving base 51 can be quickly locked when it stops suddenly, so as to avoid the moving base 51 from being unable to stop immediately due to inertia and affecting the displacement accuracy, thereby improving the displacement accuracy of the motor linear feeding;

[0039] When the movable base 51 needs to stop moving, the built-in electromagnetic part of the linear motor 8 switches the magnetic poles and the permanent magnet block 3 to generate suction to make the movable base 51 move. After stopping the movement, the linear motor 8 is temporarily in a stopped working state. At this time, the electromagnet 612 connected to the movable base 51 is in a power-off state together with the linear motor 8. After the electromagnet 612 is powered off, the magnetic force disappears, and the adsorbed valve block 64 slides downward along the valve body 63 under the action of gravity. When the side block 65 connected to the valve block 64 prevents the valve block 64 from continuing to fall, the upper hole 67 on the side of the valve block 64 is aligned with the air supply port 68, and the gas injection into the movable base 51 stops, and the gas will pass through the air supply port 6 8 enters the upper hole 67, and then enters the connecting pipe 62 through the upper hole 67. The gas enters the gas gathering groove 69 through the connecting pipe 62, and is then dispersed into the branch gas groove 610 by the gas gathering groove 69, so that the gas passes directly over the linear motor 8. When the linear motor 8 stops moving, the power supply is stopped to save electricity, and the power is cut off by the electromagnet 612 to control the valve block 64 to automatically switch the gas supply port 68 to connect with the connecting pipe 62. If the linear motor 8 loses power due to a fault, the connecting pipe 62 is automatically switched to be connected for heat dissipation to avoid overheating damage. No independent temperature control sensor and controller are required. The electromagnetic components of the motor itself are directly used to trigger the gas path switching, reducing hardware complexity.

[0040] When the gas in the air collecting tank 69 on the left is discharged from the exhaust hole 72, the exhaust hole 72 blows the lower air block 74 to move downward along the air tank end 73. The downward movement of the lower air block 74 drives the connected resistance bar 79 to pull the spring sheet to contact the top surface of the side rail 1. After the lower air block 74 moves downward, the remaining gas will enter the vent pipe 75 through the inside of the air tank end 73. The vent pipe 75 blows the push pipe 76 to push the gasket 78. When the leakage hole 77 on the side of the push pipe 76 slides out of the vent pipe 75, the remaining gas in the vent pipe 75 directly enters the inside of the buffer end shell 71 through the leakage hole 77 and sprays the gas through the small hole of the gasket 78 to prevent the linear motor from After the fault power is cut off, the inertia continues to slide and a collision is generated. The gasket 78 is used to withstand the collision and the gasket 78 pushes the push tube 76 to shrink into the vent tube 75. When the leakage hole 77 enters the vent tube 75 again, the continuously ejected gas will push the push tube 76 to slide out of the vent tube 75 again. This reciprocating process can use the gasket 78 to transfer the impact force through the push tube 76 sliding and consume it, thereby preventing the linear motor 8 and fragile components from being damaged by the impact. When the exhaust hole 72 stops ejecting, the spring sheet contracts and pulls the resistance bar 79. The resistance bar 79 is reset, driving the inclined rod 710 to push the short column 711 upward to reset the gasket 78.

[0041] The present invention provides a hydrostatic guideway linear motor feed device for machine tools. Numerous methods and approaches exist for implementing this technical solution. The foregoing merely represents a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also within the scope of protection of the present invention. Components not specified in this embodiment may be implemented using existing technologies.

Claims

1. A hydrostatic guide rail linear motor feed device for a machine tool, comprising a main rail (2), characterized in that: Side rails (1) are fixedly connected to the left and right sides of the main rail (2); a rail groove (4) is provided between the side rails (1) and the main rail (2); a permanent magnet block (3) is fixedly connected to the upper surface of the main rail (2); and an emergency stop limit mechanism (5) is slidably connected to the inner side of the rail groove (4); The emergency stop limit mechanism (5) comprises a movable base (51), an inner air groove (510) is provided inside the movable base (51), an inner groove baffle (52) is slidably connected to the inner side of the inner air groove (510), a threaded column (55) is fixedly connected to the middle part of the bottom surface of the inner groove baffle (52), a rotating handle (53) is provided on the outer side of the bottom end of the threaded column (55), and a protrusion (54) is extended outward from the outer edge of the rotating handle (53). Two limiting rods (56) are provided on both the front and rear sides of the rotating handle (53); the outer sides of the limiting rods (56) are slidably connected to a slide block (57); the bottom surface of each limiting rod (56) is provided with a return spring (58); the top surface of the rotating handle (53) is fixedly connected to a groove block (59); the inner top surface and bottom surface of the inner air groove (510) are respectively provided with an upper air port (511) and a lower air port (512).

2. The hydrostatic guide rail linear motor feed device for machine tools according to claim 1, characterized in that: An active cooling mechanism (6) is provided on the top surface of the emergency stop limit mechanism (5), and a speed reduction buffer mechanism (7) is provided on the left side of the active cooling mechanism (6).

3. The hydrostatic guide rail linear motor feed device for machine tools according to claim 2, characterized in that: A central transverse groove is provided inside the main rail (2); the movable base (51) is slidably connected to the rail groove (4); the turning handle (53) is rotatably connected to the inner groove baffle (52); the slide block (57) is fixedly connected to the movable base (51); the two ends of the return spring (58) are respectively fixedly connected to the limit clamping rod (56) and the slide block (57); the groove block (59) is slidably connected to the threaded outer side of the threaded column (55); a spring is provided on the top surface of the inner groove baffle (52); and the two ends of the spring are respectively fixedly connected to the inner groove baffle (52) and the movable base (51); the upper air port (511) is located on the upper surface of the main rail (2); and the lower air port (512) is located on the inner side of the central transverse groove of the main rail (2).

4. The hydrostatic guide rail linear motor feed device for machine tools according to claim 3, characterized in that: The active cooling mechanism (6) comprises a mounting plate (61), a connecting pipe (62) is fixedly connected to the right side of the mounting plate (61), a valve body (63) is fixedly connected to one end of the connecting pipe (62) away from the mounting plate (61), a gas supply port (68) is fixedly connected to the front side of the valve body (63), a valve block (64) is slidably connected to the interior of the valve body (63), and side blocks (65) are provided on the left and right sides of the valve block (64). The valve body (63) is provided with an inner arc channel (66), the front top of the valve body (63) is provided with an upper hole (67), the left and right bottom surfaces of the mounting plate (61) are provided with gas gathering grooves (69), and the bottom surface between the two gas gathering grooves (69) is provided with multiple branch gas grooves (610), the bottom surface of the mounting plate (61) is opened and closed with a mounting groove (611), and the top of the valve block (64) is provided with an electromagnet (612).

5. The hydrostatic guide rail linear motor feed device for machine tools according to claim 4, characterized in that: The mounting plate (61) is mounted on the top surface of the movable pedestal (51), a central hole is provided in the middle position of the front side of the valve block (64), and the air supply port (68) is connected to the interior of the movable pedestal (51) through the central hole, the upper hole (67) is connected to the interior of the inner arc channel (66), the branch air groove (610) is connected to the air gathering groove (69), and the air gathering groove (69) on the right side is connected to the connecting pipe (62), a linear motor (8) is fixedly connected to the inner side of the mounting groove (611), and the electromagnet (612) is fixedly connected to the movable pedestal (51).

6. The hydrostatic guide rail linear motor feed device for machine tools according to claim 5, characterized in that: The deceleration buffer mechanism (7) comprises a buffer end shell (71), a vent hole (72) is fixedly connected to the middle of the inner wall of the buffer end shell (71), an air groove end (73) is provided on the outer side of the air groove end (72), a lower air block (74) is slidably connected to the interior of the air groove end (73), a resistance bar (79) is fixedly connected to the bottom end of the lower air block (74), a vent pipe (75) is fixedly connected to the front and rear sides of the air groove end (73), and an air push pipe (76) is slidably connected to the interior of the vent pipe (75).

7. The hydrostatic guide rail linear motor feed device for machine tools according to claim 6, characterized in that: The outer surface of the air pushing pipe (76) is provided with an air leakage hole (77), one end of the air pushing pipe (76) away from the vent pipe (75) is fixedly connected with a gasket (78), the upper surface of the resistance bar (79) is fixedly connected with an inclined rod (710), and the side surface of the gasket (78) is fixedly connected with a short column (711).

8. The hydrostatic guide rail linear motor feed device for machine tools according to claim 7, characterized in that: The buffer end shell (71) is fixedly connected to the left side of the movable base (51), the exhaust hole (72) is connected to the air gathering groove (69) located on the left side, the gasket (78) is slidably connected to the buffer end shell (71), a spring sheet is provided between the vent pipe (75) and the resistance bar (79), and the two ends of the spring sheet are respectively fixedly connected to the vent pipe (75) and the resistance bar (79), and a small hole is opened on the front side of the gasket (78) that penetrates the interior of the buffer end shell (71).

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