Intermediate supporting structure for long-stroke transmission of ball screw of numerical control machine tool

Abstract

The invention discloses a numerical control machine tool ball screw long stroke transmission middle supporting structure, and relates to the technical field of numerical control machine tool ball screw transmission, the numerical control machine tool ball screw long stroke transmission middle supporting structure comprises a transmission mechanism, a supporting mechanism is arranged on the transmission mechanism, and the supporting mechanism comprises two round pipes, four cylindrical holes and a sliding groove; the outer wall of each circular pipe is fixedly sleeved with a circular ring block, and two symmetrical connecting blocks are fixed to the outer wall of each circular ring block. By arranging the supporting mechanism, an extra supporting point can be provided for the long-stroke ball screw, so that the self gravity, cutting force, inertia force and the like of the ball screw are effectively dispersed, and the stability of the ball screw is improved. Therefore, the bending degree of the ball screw is reduced, the size precision of machined parts is improved, the using effect of the ball screw is improved, and meanwhile the using efficiency of the ball screw is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ball screw transmission for numerically controlled machine tools, in particular to an intermediate support structure for a long-stroke transmission of a ball screw for a numerically controlled machine tool. Background Art

[0002] Ball screw drive is a precision transmission device that converts rotational motion into linear motion. Its main components include a screw, a nut and a steel ball. It achieves low friction and high-efficiency transmission through the rolling of the ball between the screw and the nut. It is widely used in CNC machine tools.

[0003] During long-stroke transmission, the existing ball screws of CNC machine tools are prone to bending and deformation under the action of external loads such as their own gravity, cutting force and inertia force, which can easily reduce the linear motion accuracy of the worktable and further affect the dimensional accuracy of the processed parts, reducing the use effect of the ball screw and also reducing the use efficiency of the ball screw.

[0004] Therefore, we propose an intermediate support structure for a long-stroke transmission of a ball screw of a CNC machine tool in order to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide an intermediate support structure for long-stroke transmission of a ball screw of a CNC machine tool, so as to solve the problem that during the long-stroke transmission process of the existing ball screw of a CNC machine tool, the ball screw is easily subjected to the action of external loads such as its own gravity, cutting force and inertia force, which can easily cause flexural deformation, thereby easily reducing the linear motion accuracy of the worktable, and then easily affecting the dimensional accuracy of the processed parts, which not only reduces the use effect of the ball screw, but also reduces the use efficiency of the ball screw.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: an intermediate support structure for a long-stroke transmission of a ball screw of a numerically controlled machine tool, comprising a transmission mechanism, wherein a support mechanism is arranged on the transmission mechanism; The supporting mechanism includes two circular tubes, four cylindrical holes and a slide groove. A circular ring block is fixedly sleeved on the outer wall of each circular tube. Two symmetrical connecting blocks are fixed on the outer wall of each circular ring block. The four connecting blocks are divided into two groups. T-shaped rods are fixed on the opposite sides of the two groups of connecting blocks. A spring is movably sleeved on the outer surface of each T-shaped rod. A sliding block is fixed on the outer wall of each circular tube. Four pulleys are installed at the bottom of each sliding block.

[0007] Preferably, the four springs are divided into two groups, the opposite ends of the two groups of springs are respectively installed on the opposite sides of the two groups of connecting blocks, the four cylindrical holes are divided into two groups, and the four T-shaped rods are divided into two groups.

[0008] Preferably, the opposite ends of the two groups of T-shaped rods are movably sleeved inside the two groups of cylindrical holes respectively, each of the sliders is slidably connected inside the slide groove, and the eight pulleys are divided into two groups, and each group of pulleys is inside the slide groove.

[0009] Preferably, the transmission mechanism comprises a machine tool bed and two slides, two symmetrical bases are fixed on the top of the machine tool bed, and a workbench is fixed between the tops of the two slides.

[0010] Preferably, a connecting piece is fixed to the bottom of the workbench, a controller is installed on one side of the machine tool bed, and a sealing plate is provided at an opening on one side of the machine tool bed.

[0011] Preferably, two symmetrical hand-tightened bolts are threaded through one side of the sealing plate, and two symmetrical perforated frames are fixed on the top of the machine tool bed, and a motor is installed on one side of one of the perforated frames.

[0012] Preferably, a screw rod is rotatably connected between the through holes of the two perforated frames via a bearing, and a nut seat is provided on the outer surface of the screw rod.

[0013] Preferably, the two slide plates are respectively slidably connected to the mounting base, the connecting member and the nut seat are mounted by bolts, and each of the hand-tightened bolts is threadedly connected to one side of the machine tool bed.

[0014] Preferably, the controller is electrically connected to the motor, the output end of the motor is installed on one end of the screw rod, each of the round tubes is movably sleeved on the outer surface of the screw rod, and one side of one of the round tubes is in contact with a side of the connecting piece away from the motor.

[0015] Preferably, the two groups of cylindrical holes are respectively opened on one side of two perforated frames, and the slide groove is opened on the top of the machine tool bed.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can provide an additional support point for a long-stroke ball screw by setting a support mechanism, thereby effectively dispersing the self-gravity, cutting force and inertia force of the ball screw, thereby reducing the bending degree of the ball screw, and then improving the dimensional accuracy of the processed parts, which not only improves the use effect of the ball screw, but also improves the use efficiency of the ball screw. The support operation of the screw can be achieved through the cooperation of the round tube, the slider, the pulley and the slide groove, and the automatic movement of the round tube can be prevented through the cooperation of the circular ring block, the connecting block, the T-shaped rod, the spring, the cylindrical hole and the hole frame.

[0017] 2. The present invention can drive the workbench to move over a long stroke by setting up a transmission mechanism. With the cooperation of the controller, the motor and the bearing, the screw rod can be driven to rotate between the through holes of the two perforated frames. With the cooperation of the rotating screw rod, the nut seat, the connecting piece, the bolt, the two bases and the two slides, the workbench can be driven to move. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of an intermediate support structure for a long-stroke transmission of a ball screw for a CNC machine tool according to the present invention; Figure 2 It is a partial stereogram of an intermediate support structure for a long-stroke transmission of a ball screw of a CNC machine tool according to the present invention; Figure 3 A sectional perspective view of a transmission mechanism portion of an intermediate support structure for a long-stroke transmission of a ball screw for a CNC machine tool according to the present invention; Figure 4 It is a partially cutaway stereoscopic view of an intermediate support structure for a long-stroke transmission of a ball screw for a CNC machine tool according to the present invention; Figure 5 It is a partial cross-sectional structural schematic diagram of an intermediate support structure for a long-stroke transmission of a ball screw for a CNC machine tool according to the present invention; Figure 6 Another partial sectional perspective view of an intermediate support structure for a long-stroke transmission of a ball screw for a CNC machine tool according to the present invention; Figure 7 It is a three-dimensional diagram of the supporting mechanism part of the intermediate supporting structure of the long-stroke transmission of the ball screw of a CNC machine tool of the present invention; Figure 8 It is a three-dimensional view of another part of the support mechanism of the intermediate support structure of the long-stroke transmission of the ball screw of a CNC machine tool according to the present invention.

[0019] In the figure: 1. transmission mechanism; 101. machine tool bed; 102. base; 103. slide plate; 104. workbench; 105. connector; 106. controller; 107. sealing plate; 108. hand-tightening bolt; 109. rack with holes; 110. motor; 111. screw rod; 112. nut seat; 2. supporting mechanism; 201. round tube; 202. circular ring block; 203. connecting block; 204. T-bar; 205. spring; 206. cylindrical hole; 207. slider; 208. pulley; 209. slide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described 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 creative work are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figure 1-Figure 8 As shown, the present invention provides a technical solution: an intermediate support structure for a long-stroke transmission of a ball screw of a CNC machine tool, comprising a transmission mechanism 1, on which a support mechanism 2 is arranged; The supporting mechanism 2 includes two circular tubes 201, four cylindrical holes 206 and a slide groove 209. The outer wall of each circular tube 201 is fixedly sleeved with a circular ring block 202. The outer wall of each circular ring block 202 is fixed with two symmetrical connecting blocks 203. The four connecting blocks 203 are divided into two groups. The opposite sides of the two groups of connecting blocks 203 are fixed with T-shaped rods 204. The outer surface of each T-shaped rod 204 is movably sleeved with a spring 205. The outer wall of each circular tube 201 is fixed with a slider 207. The bottom of each slider 207 is installed with four pulleys 208. The four springs 205 are divided into two groups. The opposite ends of the two groups of springs 205 are respectively connected to the two groups of connecting blocks 20 3 are installed on opposite sides of the two slides, the four cylindrical holes 206 are divided into two groups, the four T-shaped rods 204 are divided into two groups, the opposite ends of the two groups of T-shaped rods 204 are movably sleeved inside the two groups of cylindrical holes 206, each slider 207 is slidably connected inside the slide groove 209, the eight pulleys 208 are divided into two groups, each group of pulleys 208 is inside the slide groove 209, a workbench 104 is fixed between the tops of the two slides 103, a connecting piece 105 is fixed at the bottom of the workbench 104, two symmetrical perforated frames 109 are fixed on the top of the machine tool bed 101, and a screw rod 111 is rotatably connected between the through holes of the two perforated frames 109 through bearings.

[0022] In this embodiment, when the workbench 104 starts to move horizontally, one of the round tubes 201 moves horizontally on the outer surface of the screw rod 111 under the cooperation of the circular ring block 202 connected thereto, the corresponding set of connecting blocks 203, the corresponding set of T-shaped rods 204, the corresponding set of cylindrical holes 206, the other hole frame 109 and the corresponding set of springs 205. The round tube 201 moving horizontally will drive the corresponding slider 207 to move, and the slider 207 moving horizontally will also The corresponding set of pulleys 208 will be driven to roll inside the slide groove 209. When the surfaces of the corresponding set of T-shaped rods 204 on one of the round tubes 201 are in contact with the other side of the other frame with holes 109, one of the round tubes 201 will stop moving under the cooperation of the corresponding circular ring block 202, the corresponding set of connecting blocks 203, the corresponding set of T-shaped rods 204, the corresponding set of cylindrical holes 206 and the other frame with holes 109, and the stopped round tube 201 will separate from the connecting piece 105. When the horizontally moving connecting piece 105 contacts another round tube 201, the other round tube 201 will move horizontally with the cooperation of the continuously moving connecting piece 105 and the screw rod 111, and the moving round tube 201 will drive the corresponding pulley 208 to roll inside the slide groove 209 with the cooperation of the corresponding slider 207, and at the same time, the moving round tube 201 will drive the corresponding set of T-shaped rods 204 to roll inside the slide groove 209 with the cooperation of the corresponding circular ring block 202 and the corresponding set of connecting blocks 203. The corresponding set of cylindrical holes 206 moves inside. At the same time, the moving round tube 201 will also be in the cooperation of the corresponding circular ring block 202, the corresponding set of connecting blocks 203 and one of the hole frames 109, so that the corresponding set of springs 205 are compressed until the workbench 104 moves to a suitable position. At this time, the middle of the screw rod 111 can be supported with the cooperation of the two round tubes 201, the two sliders 207, the two sets of pulleys 208 and the slide groove 209, thereby improving the use effect of the screw rod 111.

[0023] Embodiment 2: According to Figure 1-Figure 6 and Figure 8As shown, the transmission mechanism 1 includes a machine tool bed 101 and two slides 103. Two symmetrical bases 102 are fixed on the top of the machine tool bed 101. A workbench 104 is fixed between the tops of the two slides 103. A connecting piece 105 is fixed to the bottom of the workbench 104. A controller 106 is installed on one side of the machine tool bed 101. A sealing plate 107 is provided at an opening on one side of the machine tool bed 101. Two symmetrical hand-tightening bolts 108 are threadedly penetrated on one side of the sealing plate 107. Two symmetrical perforated frames 109 are fixed on the top of the machine tool bed 101. A motor 110 is installed on one side of one of the perforated frames 109. The through holes of the two perforated frames 109 are rotatably connected via bearings. There is a screw rod 111, and a nut seat 112 is provided on the outer surface of the screw rod 111. The two slides 103 are respectively slidably connected to the mounting base 102. The connecting piece 105 and the nut seat 112 are installed by bolts. Each hand-tightened bolt 108 is threadedly connected to one side of the machine tool bed 101. The controller 106 is electrically connected to the motor 110. The output end of the motor 110 is installed with one end of the screw rod 111. Each round tube 201 is movably sleeved on the outer surface of the screw rod 111, and one side of one of the round tubes 201 is in contact with the side of the connecting piece 105 away from the motor 110. Two groups of cylindrical holes 206 are respectively opened on one side of two perforated frames 109, and the slide groove 209 is opened on the top of the machine tool bed 101.

[0024] In this embodiment, when the machine tool bed 101 needs to make the workbench 104 perform a long-stroke linear motion, the controller 106 is first connected to the external power supply, and then the motor 110 is started by the controller 106. At this time, the started motor 110 will drive the screw rod 111 to rotate inside the through holes of the two perforated frames 109 with the cooperation of the bearing, and the rotating screw rod 111 will drive the nut seat 112 to move horizontally with the cooperation of the bolts, the connecting piece 105, the workbench 104, the two slides 103 and the two bases 102, and the horizontally moving nut seat 112 will drive the workbench 104 to move horizontally with the cooperation of the bolts and the connecting piece 105. The two slides 103 move horizontally on the corresponding base 102. When the workbench 104 moves to a suitable position, the controller 106 directly turns off the motor 110. The turned-off motor 110 stops the workbench 104 from moving with the cooperation of the above-mentioned components. When the tools stored in the machine tool bed 101 need to be taken out, the two hand-tightening bolts 108 are removed first, and then the sealing plate 107 is removed. Then the tools are taken out from the inside of the machine tool bed 101, and then the sealing plate 107 is reset to its original position, and then the two hand-tightening bolts 108 are reset to their original positions.

[0025] The effect and working principle of the whole mechanism are as follows: when the machine tool bed 101 needs to make the worktable 104 perform a long-stroke linear motion, the controller 106 is first connected to the external power supply, and then the motor 110 is started by the controller 106. At this time, the started motor 110 will drive the screw rod 111 to rotate inside the through holes of the two perforated frames 109 with the cooperation of the bearing, and the rotating screw rod 111 will drive the nut seat 112 to perform horizontal movement with the cooperation of the bolts, the connecting piece 105, the worktable 104, the two slides 103 and the two bases 102, and the horizontally moving nut seat 112 will drive the worktable 104 to move horizontally with the cooperation of the bolts and the connecting piece 105, and the horizontal movement is performed at the same time. The moving workbench 104 will also drive the two slides 103 to move horizontally on the corresponding base 102. When the workbench 104 starts to move horizontally, one of the round tubes 201 will move horizontally on the outer surface of the screw rod 111 under the cooperation of the circular ring block 202 connected thereto, the corresponding set of connecting blocks 203, the corresponding set of T-shaped rods 204, the corresponding set of cylindrical holes 206, the other perforated frame 109 and the corresponding set of springs 205. The round tube 201 moving horizontally will drive the corresponding slider 207 to move, and the slider 207 moving horizontally will also drive the corresponding set of pulleys 208 to roll inside the slide groove 209. When one of the round tubes 201 moves horizontally, the corresponding slider 207 will move horizontally. When the surfaces of a group of T-shaped rods 204 corresponding to the round tube 201 are in contact with the other side of the other hole frame 109, one of the round tubes 201 will stop moving under the cooperation of the corresponding annular block 202, the corresponding group of connecting blocks 203, the corresponding group of T-shaped rods 204, the corresponding group of cylindrical holes 206 and the other hole frame 109, and the stopped round tube 201 will separate from the connecting piece 105. When the horizontally moving connecting piece 105 contacts the other round tube 201, the other round tube 201 will move horizontally under the cooperation of the continuously moving connecting piece 105 and the screw rod 111, and the moving round tube 201 will drive the corresponding slider 207 to cooperate with the corresponding The corresponding pulley 208 rolls inside the slide groove 209, and the moving round tube 201 will drive the corresponding group of T-shaped rods 204 to move inside the corresponding group of cylindrical holes 206 with the cooperation of the corresponding circular ring block 202 and the corresponding group of connecting blocks 203. At the same time, the moving round tube 201 will also compress the corresponding group of springs 205 with the cooperation of the corresponding circular ring block 202, the corresponding group of connecting blocks 203 and one of the perforated racks 109. When the workbench 104 moves to a suitable position, the controller 106 will directly turn off the motor 110. At this time, the turned-off motor 110 will stop the workbench 104 from moving with the cooperation of the above-mentioned components.At this time, the middle of the screw rod 111 can be supported with the cooperation of the two round tubes 201, the two sliders 207, the two sets of pulleys 208 and the slide groove 209, so as to improve the use effect of the screw rod 111. When it is necessary to take out the tool stored in the machine bed 101, first remove the two hand-tightening bolts 108, then remove the sealing plate 107, then take the tool out of the machine bed 101, then reset the sealing plate 107 to its original position, and then reset the two hand-tightening bolts 108 to their original positions.

[0026] Among them, bolts and bearings are common parts in real life.

[0027] Among them, the machine tool bed 101 is the bed of the CNC machine tool.

[0028] Among them, the main components of the nut seat 112 include: Nut body: A spiral raceway matching the raceway of the screw rod 111 is arranged inside the nut body, which is the channel for the ball to roll. The nut body is usually made of high-strength alloy steel material with high hardness and good wear resistance.

[0029] Ball: Ball is the key rolling element of ball screw transmission. It is generally made of high-carbon chromium bearing steel and has good hardness, wear resistance and fatigue resistance.

[0030] Internal circulation reverser: It is installed in the nut body and is a part with a special channel. When the ball rolls along the raceway of the nut to one end, the ball can change direction and enter the raceway on the other side of the nut through the guidance of the reverser, thereby achieving circulation rolling.

[0031] Gasket preload: This is achieved by adding gaskets at both ends or one side of the nut. The gasket is generally made of metal. When the nut is tightened, the gasket is compressed, and the elastic deformation produced causes a preload force to be generated between the ball and raceway inside the nut.

[0032] Among them, the controller 106 (PLC controller), the machine tool bed 101 and the motor 110 are all existing technologies, and their working principles are all public technologies. Their models can be selected according to actual conditions and will not be explained in detail here.

[0033] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intermediate support structure for a long-stroke transmission of a ball screw of a CNC machine tool, characterized in that: It comprises a transmission mechanism (1), wherein a support mechanism (2) is arranged on the transmission mechanism (1); The support mechanism (2) comprises two circular tubes (201), four cylindrical holes (206) and a slide groove (209); a circular ring block (202) is fixedly sleeved on the outer wall of each circular tube (201); two symmetrical connecting blocks (203) are fixedly mounted on the outer wall of each circular ring block (202); the four connecting blocks (203) are divided into two groups; T-shaped rods (204) are fixedly mounted on opposite sides of the two groups of connecting blocks (203); a spring (205) is movably sleeved on the outer surface of each T-shaped rod (204); a sliding block (207) is fixedly mounted on the outer wall of each circular tube (201); and four pulleys (208) are installed at the bottom of each sliding block (207).

2. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 1, characterized in that: The four springs (205) are divided into two groups, and opposite ends of the two groups of springs (205) are respectively installed on opposite sides of the two groups of connecting blocks (203). The four cylindrical holes (206) are divided into two groups, and the four T-shaped rods (204) are divided into two groups.

3. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 1, characterized in that: The opposite ends of the two groups of T-shaped rods (204) are movably sleeved inside the two groups of cylindrical holes (206), and each of the sliders (207) is slidably connected inside the slide groove (209). The eight pulleys (208) are divided into two groups, and each group of pulleys (208) is inside the slide groove (209).

4. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 1, characterized in that: The transmission mechanism (1) comprises a machine tool bed (101) and two slides (103); two symmetrical bases (102) are fixed on the top of the machine tool bed (101); and a workbench (104) is fixed between the tops of the two slides (103).

5. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 4, characterized in that: A connecting piece (105) is fixed to the bottom of the workbench (104), a controller (106) is installed on one side of the machine tool bed (101), and a sealing plate (107) is provided at an opening on one side of the machine tool bed (101).

6. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 5, characterized in that: Two symmetrical hand-tightened bolts (108) are threadedly penetrated on one side of the sealing plate (107), and two symmetrical perforated frames (109) are fixed on the top of the machine tool bed (101), wherein a motor (110) is installed on one side of one of the perforated frames (109).

7. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 6, characterized in that: A screw rod (111) is rotatably connected between the through holes of the two perforated frames (109) via a bearing, and a nut seat (112) is provided on the outer surface of the screw rod (111).

8. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 7, characterized in that: The two slide plates (103) are respectively slidably connected to the mounting base (102), the connecting member (105) and the nut seat (112) are mounted via bolts, and each of the hand-tightening bolts (108) is threadedly connected to one side of the machine tool bed (101).

9. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 7, characterized in that: The controller (106) is electrically connected to the motor (110), the output end of the motor (110) is mounted on one end of the screw rod (111), each of the round tubes (201) is movably sleeved on the outer surface of the screw rod (111), and one side of one of the round tubes (201) is in contact with a side of the connecting member (105) away from the motor (110).

10. The intermediate support structure for long-stroke transmission of a ball screw for a CNC machine tool according to claim 6, characterized in that: The two groups of cylindrical holes (206) are respectively opened on one side of two perforated frames (109), and the slide groove (209) is opened on the top of the machine tool bed (101).

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