Cutting machine tool for machining rotor of roots vacuum pump

Abstract

The invention discloses a cutting machine tool for machining a rotor of a roots vacuum pump, and relates to the technical field of cutting machine tools. The cutting machine tool comprises a cutting machine tool body, wherein a bracket for mounting a rotor of the roots vacuum pump is arranged on a workbench of the cutting machine tool body; two through holes are formed in the end part of the Roots vacuum pump rotor along the length direction of the shaft; the support comprises a support body, one side of the support body is rotatably connected with a cross beam, the two ends of the cross beam are connected with longitudinal beams respectively, the ends of the longitudinal beams are connected with base plates abutting against the end face of the rotor of the roots vacuum pump, and one side of each base plate is connected with a fixing structure extending into the corresponding through hole. According to the Roots vacuum pump rotor fixing device, the two supports located on the two sides of the Roots vacuum pump rotor are arranged on the workbench to fix the Roots vacuum pump rotor, any support is provided with the two fixing structures used for being inserted into the through holes, and therefore the Roots vacuum pump rotor is fixed through the two supports when the Roots vacuum pump rotor fixing device is used; and the stability of the roots vacuum pump rotor during processing is kept.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting machine tools, and in particular relates to a cutting machine tool for machining a Roots vacuum pump rotor. Background Art

[0002] Roots vacuum pump is a rotary fluid machine. It generates vacuum at the suction end and forms a pressure difference through two mutually engaging Roots rotors that perform synchronous and opposite-direction double-rotation motions, thereby achieving gas suction and discharge. The balance of the Roots rotors during rotation has a great influence on the sealing performance and operating efficiency of the Roots vacuum pump.

[0003] For example, the Chinese patent application number CN201520010348.9 discloses a three-blade rotor boring fixture for a Roots pump, which includes a clamping body, a workbench for mounting the clamping body, and a boring bar with a boring tool mounted on the end of the clamping body. The clamping body moves linearly on the workbench; the clamping body includes two parallel thick vertical plates, the thick vertical plates are provided with mounting holes for mounting the shaft head of the three-blade rotor and supporting holes for mounting the boring bar, the thick vertical plates are provided with T-shaped clamping heads for clamping and fixing the shaft head of the three-blade rotor, and two radial clamping devices are symmetrically arranged on the clamping body on both sides of the three-blade rotor; a fixed plate is provided on one side of the workbench, and a bearing is provided in the fixed plate, a gear set is connected to the outer side of the bearing, and a universal joint connected to the end of the boring bar is connected to the inner side. However, in the above technical solution, it is not possible to clamp and fix the rotor well during processing to ensure that the rotor does not shake during the processing. Summary of the invention

[0004] The object of the present invention is to provide a cutting machine for machining Roots vacuum pump rotors, which solves the problems raised by the prior art by arranging two brackets on the workbench, respectively located on both sides of the Roots vacuum pump rotor, to fix the rotor, and any bracket is provided with two fixing structures for inserting into the through hole.

[0005] To solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The present invention is a cutting machine tool for machining Roots vacuum pump rotors, comprising a cutting machine tool body, a support for mounting the Roots vacuum pump rotor is arranged on a workbench of the cutting machine tool body; the Roots vacuum pump rotor comprises two ends respectively provided with shafts, and the ends of the Roots vacuum pump rotor located on both sides of the shaft are provided with through holes along the length direction of the shaft; the support comprises a support body, one side of the support body is rotatably connected with a cross beam, the two ends of the cross beam are respectively connected with longitudinal beams, the ends of the longitudinal beams are connected with a base plate abutting against the end face of the Roots vacuum pump rotor, and one side of the base plate is connected with a fixing structure extending into the through hole; the fixing structure comprises a supporting ring connected to one side of the base plate through a connecting rod, and the inner ring of the supporting ring A cylinder is fixed, a hinge seat A is provided on the peripheral side of the outer bottom of the cylinder, and a connecting rod A is hinged on the hinge seat A; a movable column sliding along the inside of the cylinder is connected to the cylinder through a spring, the end of the movable column is connected to a mounting plate, a hinge seat B is provided on the peripheral side of the mounting plate, a connecting rod B is hinged on the hinge seat B, the ends of the connecting rod B and the connecting rod A are hinged on the same U-shaped hinge seat, and a rubber block abutting against the inner side wall of the through hole is provided on the outer bottom side of the U-shaped hinge seat; a guide hole is provided through the longitudinal beam along its axial direction, a guide rod matching the guide hole is connected to one side of the mounting plate, an internal threaded sleeve is fixed on the inner wall of one end of the guide hole, and an adjusting bolt A is threadedly connected to the internal threaded sleeve, the end of which abuts against the end of the guide rod.

[0007] Furthermore, the bracket body includes a column fixed on the upper surface of the workbench, a bearing mounting hole is opened on one side of the column, a bearing is mounted in the bearing mounting hole, the inner ring of the bearing is connected to a fixing rod with a rectangular cross-section, and the end of the fixing rod is connected to one side of the beam.

[0008] Furthermore, the cross section of the longitudinal beam is a rectangular structure, and rectangular openings for inserting the longitudinal beam are respectively provided at both ends of the cross beam, and locking bolts for fixing the longitudinal beam inserted into the rectangular openings are provided at the ends of the cross beam.

[0009] Furthermore, a protrusion is provided on the top of the column, and a top plate extending toward the inner side wall is provided on the top of the protrusion, and a U-shaped block clamped on the fixed rod is connected to the bottom side of the top plate through a guide telescopic sleeve; an adjusting bolt B is also threadedly connected on the top plate, which passes through the guide telescopic sleeve and the end of which rests on the U-shaped block.

[0010] Furthermore, the guiding telescopic sleeve comprises an inner sleeve and an outer sleeve which cooperate with each other, and a spring is arranged between the inner sleeve and the outer sleeve, with two ends respectively connected to the U-shaped block and the top plate.

[0011] Furthermore, a supporting structure for supporting the Roots vacuum pump rotor is also provided on the upper surface of the workbench; the supporting structure is located directly below the Roots vacuum pump rotor, and includes a telescopic cylinder fixed on the upper surface of the workbench, the end of the telescopic cylinder is connected to a frame, and the frame is connected to a plurality of U-shaped support frames supported on the Roots vacuum pump rotor.

[0012] Furthermore, the cutting machine tool body includes a base, and a polished rod A and a lead screw A are fixed to the upper surface of the base through a fixed seat A. A nut A is arranged on the lead screw A, and the nut A is fixed to the bottom side of the workbench. A slider A cooperating with the polished rod A is also arranged on the bottom side of the workbench; a motor A transmission-connected to the lead screw A is fixed to one side of the base.

[0013] Furthermore, fixed columns are arranged on both sides of the base, a connecting arm is connected between the two fixed columns, and a pair of light rod B and lead screw B are connected between the two fixed columns; a U-shaped fixed seat is also included, a nut B is arranged on the lead screw B, and the nut B is fixed on the back side of the U-shaped fixed seat; an opening for the light rod A to pass through is opened on the U-shaped fixed seat; a pair of light rod C and lead screw C are connected between the two opposite inner walls of the U-shaped fixed seat; a fixed clamp seat for installing a cutting tool is also included, and a hole A and a hole B for the light rod C and the lead screw C to pass through are arranged on the back side of the fixed clamp seat, and a nut C matching with the lead screw C is installed in the hole B.

[0014] Furthermore, a motor B is installed on one of the fixing columns, and the end of the motor B is transmission-connected to one end of the lead screw B; a motor C transmission-connected to the lead screw C is installed on one side of the U-shaped fixing seat.

[0015] The present invention has the following beneficial effects:

[0016] The present invention fixes the Roots vacuum pump rotor by arranging two brackets respectively located on both sides of the Roots vacuum pump rotor on a workbench, and two fixing structures for inserting into the through holes are arranged on any bracket, so that the Roots vacuum pump rotor is fixed by the two brackets when in use, thereby maintaining the stability of the Roots vacuum pump rotor during processing.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the structure of the cutting machine tool of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0021] Figure 3 for Figure 1 Main view;

[0022] Figure 4 It is a schematic diagram of the fixed structure of the present invention. DETAILED DESCRIPTION

[0023] 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 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 creative work are within the scope of protection of the present invention.

[0024] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] See also Figure 1-4 As shown, the present invention is a cutting machine tool for machining Roots vacuum pump rotors, comprising a cutting machine tool body, the cutting machine tool body comprising a three-axis moving mechanism for driving a cutting tool 91 to move, a workbench 10 is arranged below the three-axis moving mechanism, and a bracket for fixing a Roots vacuum pump rotor 3 is installed on the workbench 10, the number of the brackets is two, and the two brackets are respectively installed on both sides of the workbench 10; the Roots vacuum pump rotor 3 comprises two ends respectively provided with shafts 31, and the ends of the Roots vacuum pump rotor 3 located on both sides of the shaft 31 are provided with through holes along the length direction of the shaft 31.

[0026] The bracket includes a bracket body, which includes a column 2 fixed on the upper surface of the workbench 10. A bearing mounting hole is opened on one side of the column 2, and a bearing is mounted in the bearing mounting hole. The inner ring of the bearing is connected to a fixing rod 21 with a rectangular cross section. The end of the fixing rod 21 is connected to one side of a crossbeam 22. The two ends of the crossbeam 22 are respectively connected to a longitudinal beam 24, and the ends of the longitudinal beam 24 are connected to a base plate 25 that rests on the end surface of the Roots vacuum pump rotor 3. One side of the base plate 25 is connected to a fixing structure extending into the through hole. When in use, the fixing structure is controlled to extend into the through hole, and the fixing structure is controlled to contact the inner wall of the through hole after being unfolded, so as to connect the two together. That is, when in use, the present invention uses four fixing structures to extend into the two ends of the two through holes, and then uses the bracket to fix the Roots vacuum pump rotor 3.

[0027] In order to facilitate the control of the unfolding of the fixed structure during use so that the fixed structure can contact and connect with the inner wall of the through hole, the fixed structure provided by the present invention includes a support ring 252 connected to one side of the base plate 25 through a connecting rod 251, and the inner ring of the support ring 252 is fixed with a cylinder 253, and a hinge seat A254 is provided on the outer bottom periphery of the cylinder 253, and a connecting rod A255 is hinged on the hinge seat A254; a movable column 28 sliding along the inside of the cylinder 253 is connected by a spring, and the end of the movable column 28 is connected to the mounting plate 27, and a hinge seat B271 is provided on the periphery of the mounting plate 27, and a connecting rod B272 is hinged on the hinge seat B271, and the ends of the connecting rod B272 and the connecting rod A255 are both hinged on the same U-shaped hinge seat 26 A rubber block 261 is provided on the outer bottom side of the U-shaped hinge seat 26 and abuts against the inner side wall of the through hole; a guide hole 241 is provided in the longitudinal beam 24 along its axial direction, and a guide rod 243 cooperating with the guide hole 241 is connected to one side of the mounting plate 27, and an internal threaded sleeve is fixed on the inner wall of one end of the guide hole 241, and an adjusting bolt A242 whose end abuts against the end of the guide rod 243 is threadedly connected on the internal threaded sleeve, and then when in use, the guide rod 243 is driven to move along the axial direction of the guide hole 241 by controlling the rotation of the adjusting bolt A242, thereby controlling the cylinder 253 and the movable column 28 to approach each other, and then driving the hinge seat B271 and the hinge seat A254 to approach each other, so that the rubber block 261 abuts against the inner side wall of the through hole.

[0028] In order to facilitate the control of the fixing structure extending into the through hole during use, it is necessary to control the fixing structure to move in the horizontal direction during use, that is, the cross-section of the longitudinal beam 24 of the present invention is a rectangular structure, and rectangular openings 221 for inserting the longitudinal beam 24 are respectively provided at both ends of the cross beam 22, and locking bolts 222 are provided at the end of the cross beam 22 to fix the longitudinal beam 24 inserted into the rectangular opening 221.

[0029] Similarly, in order to use the cutting tool 91 to process the Roots vacuum pump rotor 3, it is necessary to keep the Roots vacuum pump rotor 3 in a stable state during the processing stage, that is, the fixed rod 21 needs to be fixed in a stable state during use to avoid deflection of the fixed rod 21 during use. A protrusion 23 is provided on the top of the column 2, and a top plate 231 extending toward the inner wall is provided on the top of the protrusion 23. The bottom side surface of the top plate 231 is connected to a U-shaped block 233 clamped on the fixed rod 21 through a guide telescopic sleeve 232; the top plate 231 is also threadedly connected with an adjusting bolt B234 that penetrates the guide telescopic sleeve 232 and whose end rests on the U-shaped block 233, so that the U-shaped block 233 is controlled to be clamped on one side of the fixed rod 21 during use, thereby maintaining the overall stability.

[0030] Specifically, the guiding telescopic sleeve 232 includes an inner sleeve and an outer sleeve that cooperate with each other, and a spring is provided between the inner sleeve and the outer sleeve, with two ends respectively connected to the U-shaped block 233 and the top plate 231 .

[0031] On the basis of the above, in order to better maintain the stability of the Roots vacuum pump rotor 3 in the processing stage, a support structure for supporting the Roots vacuum pump rotor 3 is also provided on the upper surface of the workbench 10; the support structure is located directly below the Roots vacuum pump rotor 3, and includes a telescopic cylinder 29 fixed on the upper surface of the workbench 10, and the end of the telescopic cylinder 29 is connected to a frame 291, and the frame 291 is connected to a plurality of U-shaped support frames 292 supported on the Roots vacuum pump rotor 3. Then, when processing is carried out, the telescopic cylinder 29 is controlled to extend, and then the U-shaped support frame 292 is controlled to press against the bottom of the Roots vacuum pump rotor 3 to support the Roots vacuum pump rotor 3 in the processing state.

[0032] It can be known that the cutting machine tool body of the present invention includes a base 1, and the three-axis moving mechanism includes a polished rod A11 and a lead screw A12 fixed to the upper surface of the base 1 through a fixed seat A, a nut A is arranged on the lead screw A12, and the nut A is fixed to the bottom side of the workbench 10, and a slider A cooperating with the polished rod A11 is also arranged on the bottom side of the workbench 10; a motor A13 connected to the lead screw A12 for transmission is fixed on one side of the base 1; fixed columns 14 are arranged on both sides of the base 1, a connecting arm 140 is connected between the two fixed columns 14, a pair of polished rods B16 and a lead screw B15 are fixed between the two fixed columns 14 through a fixed seat B, a motor B150 is installed on one fixed column 14, and the motor B15 0 is transmission connected to one end of the lead screw B15; it also includes a U-shaped fixed seat 17, on which a nut B is arranged, and the nut B is fixed to the back of the U-shaped fixed seat 17; an opening is opened on the U-shaped fixed seat 17 for the light rod A11 to pass through; a pair of light rods C171 and a lead screw C172 are connected between the two opposite inner walls of the U-shaped fixed seat 17; it also includes a fixed clamp seat 19 for mounting the cutting tool 91, and the back of the fixed clamp seat 19 is provided with a hole A and a hole B for the light rod C171 and the lead screw C172 to pass through respectively, a nut C matching the lead screw C172 is installed in the hole B, and a motor C18 transmission-connected to the lead screw C172 is installed on one side of the U-shaped fixed seat 17.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0034] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A cutting machine tool for machining a Roots vacuum pump rotor, characterized in that: The invention comprises a cutting machine tool body, wherein a bracket for mounting a Roots vacuum pump rotor (3) is arranged on a workbench (10) of the cutting machine tool body; the Roots vacuum pump rotor (3) comprises two ends respectively provided with shafts (31), and the ends of the Roots vacuum pump rotor (3) located on both sides of the shaft (31) are provided with through holes along the length direction of the shaft (31); The bracket comprises a bracket body, one side of the bracket body is rotatably connected to a crossbeam (22), both ends of the crossbeam (22) are respectively connected to longitudinal beams (24), the ends of the longitudinal beams (24) are connected to a base plate (25) abutting against the end surface of the Roots vacuum pump rotor (3), and one side of the base plate (25) is connected to a fixing structure extending into the through hole; The fixing structure comprises a support ring (252) connected to one side of the base plate (25) through a connecting rod (251), the inner ring of the support ring (252) is fixed with a cylinder (253), the outer bottom peripheral side of the cylinder (253) is provided with a hinge seat A (254), and the hinge seat A (254) is hinged with a connecting rod A (255); the cylinder (253) is connected with a movable column (28) sliding along the inside thereof through a spring, the end of the movable column (28) is connected to a mounting plate (27), the peripheral side of the mounting plate (27) is provided with a hinge seat B (271), and the hinge seat B (271) is hinged with a connecting rod B (272), the ends of the connecting rod B (272) and the connecting rod A (255) are both hinged on the same U-shaped hinge seat (26), and the outer bottom side of the U-shaped hinge seat (26) is provided with a rubber block (261) that abuts against the inner side wall of the through hole; A guide hole (241) is provided in the longitudinal beam (24) along its axial direction, and a guide rod (243) matching with the guide hole (241) is connected to one side of the mounting plate (27). An internal threaded sleeve is fixed on the inner wall of one end of the guide hole (241), and an adjusting bolt A (242) is threadedly connected to the internal threaded sleeve, the end of which abuts against the end of the guide rod (243).

2. A cutting machine tool for machining Roots vacuum pump rotors according to claim 1, characterized in that: The support body comprises a column (2) fixed on the upper surface of the workbench (10), a bearing mounting hole is opened on one side of the column (2), a bearing is mounted in the bearing mounting hole, the inner ring of the bearing is connected to a fixing rod (21) with a rectangular cross section, and the end of the fixing rod (21) is connected to one side of the crossbeam (22).

3. A cutting machine tool for machining Roots vacuum pump rotors according to claim 2, characterized in that: The cross section of the longitudinal beam (24) is a rectangular structure, and rectangular openings (221) for inserting the longitudinal beam (24) are respectively provided at both ends of the cross beam (22), and locking bolts (222) are provided at the ends of the cross beam (22) for fixing the longitudinal beam (24) inserted into the rectangular openings (221).

4. A cutting machine tool for machining Roots vacuum pump rotors according to claim 1, characterized in that: A protruding portion (23) is arranged at the top of the column (2), a top plate (231) extending toward the inner side wall is arranged at the top of the protruding portion (23), and a U-shaped clamping block (233) clamped on the fixing rod (21) is connected to the bottom side of the top plate (231) through a guiding telescopic sleeve (232); The top plate (231) is also threadedly connected with an adjusting bolt B (234) that penetrates the guiding telescopic sleeve (232) and has its end abutting against the U-shaped clamping block (233).

5. A cutting machine tool for machining Roots vacuum pump rotors according to claim 4, characterized in that: The guide telescopic sleeve (232) comprises an inner sleeve and an outer sleeve that cooperate with each other, and a spring is provided between the inner sleeve and the outer sleeve, with two ends respectively connected to the U-shaped clamping block (233) and the top plate (231).

6. A cutting machine tool for machining Roots vacuum pump rotors according to any one of claims 1 to 5, characterized in that: A support structure for supporting the Roots vacuum pump rotor (3) is also provided on the upper surface of the workbench (10); the support structure is located directly below the Roots vacuum pump rotor (3), and comprises a telescopic cylinder (29) fixed to the upper surface of the workbench (10); the end of the telescopic cylinder (29) is connected to a frame (291); and the frame (291) is connected to a plurality of U-shaped support frames (292) supported on the Roots vacuum pump rotor (3).

7. A cutting machine tool for machining Roots vacuum pump rotors according to any one of claims 1 to 5, characterized in that: The cutting machine tool body comprises a base (1), a polished rod A (11) and a lead screw A (12) are fixed to the upper surface of the base (1) via a fixing seat A, a nut A is provided on the lead screw A (12), the nut A is fixed to the bottom side of a workbench (10), and a slider A which cooperates with the polished rod A (11) is also provided on the bottom side of the workbench (10); A motor A (13) drivingly connected to a lead screw A (12) is fixed on one side of the base (1).

8. The cutting machine tool for machining Roots vacuum pump rotors according to claim 7, characterized in that: Fixed columns (14) are arranged on both sides of the base (1), a connecting arm (140) is connected between the two fixed columns (14), and a pair of smooth rods B (16) and a lead screw B (15) are connected between the two fixed columns (14); It also includes a U-shaped fixing seat (17), the screw rod B (15) is matched with a nut B, and the nut B is fixed on the back side of the U-shaped fixing seat (17); The U-shaped fixing seat (17) is provided with an opening for the polished rod A (11) to pass through; A pair of polished rods C (171) and a lead screw C (172) are connected between two opposite inner walls of the U-shaped fixing seat (17); It also includes a fixing clamp seat (19) for mounting the cutting tool (91), the back side of the fixing clamp seat (19) being provided with a hole A and a hole B for respectively passing the polished rod C (171) and the lead screw C (172), and a nut C matching the lead screw C (172) being installed in the hole B.

9. A cutting machine tool for machining Roots vacuum pump rotors according to claim 8, characterized in that: A motor B (150) is installed on one of the fixed columns (14), and an end of the motor B (150) is drivingly connected to one end of the lead screw B (15).

10. The cutting machine tool for machining Roots vacuum pump rotors according to claim 8, characterized in that: A motor C (18) drivingly connected to a lead screw C (172) is installed on one side of the U-shaped fixing seat (17).

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