Hydraulic jacking device of gear hobbing machine

Abstract

The utility model discloses a hydraulic jacking device of a gear hobbing machine, which comprises a mounting seat and a hobbing cutter, four groups of extrusion holes distributed in pairs are arranged on the hobbing cutter, four groups of mounting rods distributed symmetrically are arranged on the mounting seat, the four groups of mounting rods are all connected with the mounting seat in a sliding manner, two groups of bidirectional screw rods distributed vertically are arranged in the mounting seat, and the two groups of bidirectional screw rods are connected with the hobbing cutter in a sliding manner. A first expansion pipe is arranged on the mounting rod, a first piston pipe is arranged in the first expansion pipe, a second motor drives a first threaded rod to rotate, the first piston pipe interacts inwards under the limiting effect of the first expansion pipe, oil in an interlayer of the first expansion pipe is extruded, the pipe wall of the first expansion pipe is expanded, and the oil in the interlayer of the first expansion pipe is expanded. And extrusion holes are extruded, the hobbing cutter is firmly fixed in a hydraulic expansion jacking mode, and the situation that in the hobbing cutter machining process, due to external collision or high-speed rotation, the hobbing cutter is fixed loosely is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of gear hobbing machines, in particular to a hydraulic jacking device of a gear hobbing machine. Background Art

[0002] Gear hobbing machine is the most widely used type of gear processing machine tool. It can cut spur and helical cylindrical gears, and can also process worm wheels, sprockets, etc. It uses hobs to process spur, helical and herringbone cylindrical gears and worm wheels according to the development method. This machine tool can also process workpieces with various special tooth shapes such as splines and sprockets when using special hobs.

[0003] During the gear machining process, the impact force between the hob and the workpiece and the torque are relatively large. The firmness of the hob fixation during machining has a great influence on the machining accuracy of the workpiece. In the prior art, the hob handle is mostly fixed by a claw plate, and the blade may still come off during high-speed rotation. Therefore, a hydraulic tightening device for the gear hobbing machine is proposed. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic tightening device for a gear hobbing machine, which solves the problem that the hob handle is mostly fixed by a claw plate in the prior art, and the blade may still come off during high-speed rotation, thereby causing gear processing failures.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The hydraulic tightening device of the gear hobbing machine includes a mounting seat and a hob, and is characterized in that the hob is provided with four groups of extrusion holes distributed in pairs, the mounting seat is provided with four groups of symmetrically distributed mounting rods, the four groups of mounting rods are all slidably connected with the mounting seat, two groups of vertically distributed bidirectional screw rods are provided in the mounting seat, the mounting rod is provided with a first expansion tube, the first expansion tube is arranged corresponding to the extrusion hole, the first expansion tube is slidably connected with the hob through the extrusion hole, a first piston tube is provided in the first expansion tube, and the first piston tube is slidably connected with the first expansion tube.

[0007] Preferably, the two ends of the two groups of bidirectional screw rods respectively pass through the mounting seat and are rotatably connected to the mounting seat. A first motor is provided on the mounting seat, and the bidirectional screw rods are connected to the corresponding output ends of the first motor. The two ends of the bidirectional screw rods respectively pass through two groups of mounting rods and are threadedly connected to the mounting rods.

[0008] Preferably, two groups of symmetrically arranged sliding rods are distributed on the first expansion tube, the first piston tube is slidably sleeved on the sliding rods, a spring is sleeved on the sliding rods, and two ends of the spring are respectively fixedly connected to the first piston tube and the sliding rods.

[0009] Preferably, the first expansion tube is provided with a first threaded rod, the first threaded rod passes through the first piston tube and is threadedly connected to the first piston tube, the first expansion tube is provided with a second motor, and the first threaded rod is connected to the output end of the second motor.

[0010] Preferably, a mounting plate is provided in the mounting seat, a rack is provided in the mounting seat, a gear is installed below the mounting plate, a cylinder is provided in the mounting seat, a latch is provided above the mounting plate, three groups of annularly distributed moving seats are provided above the mounting seat, three groups of slide grooves are opened on the mounting seat, a second expansion tube is provided above the moving seat, the bottom of the roller is slidably connected with the second expansion tube, a second piston tube is provided in the second expansion tube, the second piston tube is slidably connected with the second expansion tube through a slider, and a mounting frame is provided in the second expansion tube.

[0011] Preferably, the mounting plate is rotatably connected to the mounting seat via a rotating shaft, the rack is slidably connected to the mounting seat, the rack is meshingly connected to the gear, the rack is connected to the output end of the cylinder piston rod, the movable seat is slidably connected to the mounting seat via a slide groove, and the movable seat is meshingly connected to the mounting seat via a latch tooth.

[0012] Preferably, a second threaded rod is provided on the mounting frame, the second threaded rod passes through the slider and is threadedly connected to the slider, a third motor is provided in the second expansion tube, and the lower end of the second threaded rod is connected to the output end of the third motor.

[0013] Compared with the prior art, the utility model has the following beneficial effects: when the device is used, the interlayers of the first expansion tube and the second expansion tube are filled with oil, the roller cutter is sleeved outside the three groups of second expansion tubes, and the extrusion hole corresponds to the corresponding first expansion tube, the cylinder is started to drive the rack to slide, and the mounting plate is rotated in coordination with the gear, and under the limiting action of the slide groove, the three groups of moving seats meshed with the mounting plate through the latch teeth slide outward synchronously until the three groups of second expansion tubes are against the inner wall of the roller cutter, and then the third motor is started to drive the second threaded rod to rotate, and under the limiting action of the second expansion tube, the second piston tube slides upward and squeezes the oil in the second expansion tube. The second expansion tube is expanded and deformed to increase the extrusion pressure on the inner wall of the roller cutter. The first motor is then started to drive the bidirectional screw rod to rotate, so that the two sets of relative mounting rods slide inward synchronously until the first expansion tube is connected to the roller cutter through the extrusion hole. The second motor is then started to drive the first threaded rod to rotate. Under the limiting action of the first expansion tube, the first piston tube interacts inward to squeeze the oil in the interlayer of the first expansion tube, so that the tube wall of the first expansion tube expands and squeezes the extrusion hole. The roller cutter is firmly fixed by hydraulic expansion and tightening. During the roller cutter processing, the roller cutter will not be loosened due to external collision or high-speed rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a structural schematic diagram of the installation rod of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the first expansion tube of the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the second expansion tube of the utility model;

[0018] Figure 5 For this utility model Figure 4 -A magnified view of the structure.

[0019] In the figure: 1. mounting seat; 2. hob; 3. extrusion hole; 4. mounting rod; 5. first expansion tube; 6. bidirectional screw rod; 7. first motor; 8. first piston tube; 9. slide rod; 10. spring; 11. first threaded rod; 12. second motor; 13. mounting plate; 14. latching gear; 15. movable seat; 16. slide groove; 17. gear; 18. rack; 19. cylinder; 20. second expansion tube; 21. second piston tube; 22. slide block; 23. mounting frame; 24. second threaded rod; 25. third motor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Reference Figure 1-3, comprising a mounting seat 1 and a hob 2, characterized in that the hob 2 is provided with four groups of extrusion holes 3 distributed in pairs, the mounting seat 1 is provided with four groups of symmetrically distributed mounting rods 4, the four groups of mounting rods 4 are all slidably connected to the mounting seat 1, the mounting seat 1 is provided with two groups of vertically distributed bidirectional screw rods 6, the mounting rod 4 is provided with a first expansion tube 5, the first expansion tube 5 is arranged corresponding to the extrusion hole 3, the first expansion tube 5 is slidably sleeved with the hob 2 through the extrusion hole 3, the first expansion tube 5 is provided with a first piston tube 8, the first piston tube 8 is slidably connected to the first expansion tube 5, the two ends of the two groups of bidirectional screw rods 6 respectively penetrate the mounting seat 1 and are rotatably connected to the mounting seat 1, the mounting seat 1 is provided with a first expansion tube 5, and the first expansion tube 5 is provided with a first piston tube 8. The first piston tube 8 is slidably connected to the first expansion tube 5. The two ends of the two groups of bidirectional screw rods 6 respectively penetrate the mounting seat 1 and are rotatably connected to the mounting seat 1. A first motor 7 is provided, the bidirectional screw rod 6 is connected to the output end of the corresponding first motor 7, the two ends of the bidirectional screw rod 6 respectively penetrate the two groups of mounting rods 4 and are threadedly connected to the mounting rods 4, two groups of symmetrically arranged sliding rods 9 are distributed on the first expansion tube 5, the first piston tube 8 is slidably sleeved with the sliding rod 9, a spring 10 is sleeved on the sliding rod 9, the two ends of the spring 10 are respectively fixedly connected to the first piston tube 8 and the sliding rod 9, a first threaded rod 11 is provided on the first expansion tube 5, the first threaded rod 11 penetrates the first piston tube 8 and is threadedly connected to the first piston tube 8, a second motor 12 is provided on the first expansion tube 5, and the first threaded rod 11 is connected to the output end of the second motor 12;

[0022] During use: start the first motor 7 to drive the bidirectional screw rod 6 to rotate, so that the two sets of relative installation rods 4 slide inward synchronously until the first expansion tube 5 is connected with the hob 2 through the extrusion hole 3, and then start the second motor 12 to drive the first threaded rod 11 to rotate. Under the limiting action of the first expansion tube 5, the first piston tube 8 interacts inward, squeezes the oil in the interlayer of the first expansion tube 5, so that the tube wall of the first expansion tube 5 expands and squeezes the extrusion hole 3. The hob 2 is firmly fixed by hydraulic expansion and tightening. During the processing of the hob 2, the hob 2 will not be loosened due to external collision or high-speed rotation.

[0023] Reference Figure 2-5The mounting seat 1 is provided with a mounting plate 13, a rack 18 is provided in the mounting seat 1, a gear 17 is installed below the mounting plate 13, a cylinder 19 is provided in the mounting seat 1, a latch 14 is provided above the mounting plate 13, three groups of annularly distributed moving seats 15 are provided above the mounting seat 1, three groups of slide grooves 16 are opened on the mounting seat 1, a second expansion tube 20 is provided above the moving seat 15, the bottom of the hob 2 is slidably connected with the second expansion tube 20, a second piston tube 21 is provided in the second expansion tube 20, the second piston tube 21 is slidably connected with the second expansion tube 20 through a slider 22, and a second expansion tube 20 is provided in the second expansion tube 20 There is a mounting frame 23, the mounting plate 13 is rotatably connected to the mounting seat 1 through a rotating shaft, the rack 18 is slidably connected to the mounting seat 1, the rack 18 is meshed with the gear 17, the rack 18 is connected to the output end of the piston rod of the cylinder 19, the moving seat 15 is slidably connected to the mounting seat 1 through a slide groove 16, the moving seat 15 is meshed with the mounting seat 1 through a latch 14, a second threaded rod 24 is provided on the mounting frame 23, the second threaded rod 24 passes through the slider 22 and is threadedly connected to the slider 22, a third motor 25 is provided in the second expansion tube 20, and the lower end of the second threaded rod 24 is connected to the output end of the third motor 25;

[0024] During use: start the cylinder 19 to drive the rack 18 to slide, cooperate with the gear 17 to rotate the mounting plate 13, and under the limiting action of the slide groove 16, the three groups of movable seats 15 meshing with the mounting plate 13 through the latch teeth 14 slide outward synchronously until the three groups of second expansion tubes 20 are against the inner wall of the hob 2, and then start the third motor 25 to drive the second threaded rod 24 to rotate, and under the limiting action of the second expansion tube 20, the second piston tube 21 slides upward, and the oil in the second expansion tube 20 is squeezed to make the second expansion tube 20 expand and deform, thereby strengthening the squeezing force on the inner wall of the hob 2.

[0025] In summary, in the hydraulic tightening device of the gear hobbing machine, the interlayers of the first expansion tube 5 and the second expansion tube 20 are filled with oil, the hob 2 is sleeved outside the three groups of second expansion tubes 20, and the extrusion hole 3 corresponds to the corresponding first expansion tube 5, the cylinder 19 is started to drive the rack 18 to slide, and the gear 17 is matched to rotate the mounting plate 13, and under the limiting action of the slide groove 16, the three groups of movable seats 15 meshingly connected with the mounting plate 13 through the latch teeth 14 are synchronously slid outward until the three groups of second expansion tubes 20 are against the inner wall of the hob 2, and then the third motor 25 is started to drive the second threaded rod 24 to rotate, and under the limiting action of the second expansion tube 20, the second piston tube 21 slides upward, and the oil in the second expansion tube 20 is pressed. The extrusion is performed to cause the second expansion tube 20 to expand and deform, thereby increasing the extrusion force on the inner wall of the hob 2. Subsequently, the first motor 7 is started to drive the bidirectional screw 6 to rotate, so that the two sets of relative mounting rods 4 slide inward synchronously until the first expansion tube 5 is sleeved with the hob 2 through the extrusion hole 3. Subsequently, the second motor 12 is started to drive the first threaded rod 11 to rotate, and under the limiting action of the first expansion tube 5, the first piston tube 8 interacts inward, and the oil in the interlayer of the first expansion tube 5 is squeezed, so that the tube wall of the first expansion tube 5 expands and the extrusion hole 3 is squeezed. The hob 2 is firmly fixed by hydraulic expansion and tightening, and the hob 2 will not be loosened due to external collision or high-speed rotation during the processing of the hob 2.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic jacking device for a gear hobbing machine, comprising a mounting seat (1) and a hob (2), characterized in that: The roller cutter (2) is provided with four groups of extrusion holes (3) distributed in pairs, the mounting seat (1) is provided with four groups of symmetrically distributed mounting rods (4), the four groups of mounting rods (4) are all slidably connected to the mounting seat (1), the mounting seat (1) is provided with two groups of vertically distributed bidirectional screw rods (6), the mounting rod (4) is provided with a first expansion tube (5), the first expansion tube (5) is arranged corresponding to the extrusion hole (3), the first expansion tube (5) is slidably sleeved with the roller cutter (2) through the extrusion hole (3), the first expansion tube (5) is provided with a first piston tube (8), and the first piston tube (8) is slidably connected to the first expansion tube (5).

2. The hydraulic jacking device of the gear hobbing machine according to claim 1, characterized in that: The two ends of the two groups of bidirectional screw rods (6) respectively penetrate the mounting seat (1) and are rotatably connected to the mounting seat (1); a first motor (7) is provided on the mounting seat (1); the bidirectional screw rods (6) are connected to the output ends of the corresponding first motors (7); and the two ends of the bidirectional screw rods (6) respectively penetrate the two groups of mounting rods (4) and are threadedly connected to the mounting rods (4).

3. The hydraulic jacking device of the gear hobbing machine according to claim 1, characterized in that: Two groups of symmetrically arranged sliding rods (9) are distributed on the first expansion tube (5); the first piston tube (8) is slidably sleeved on the sliding rod (9); a spring (10) is sleeved on the sliding rod (9); and the two ends of the spring (10) are respectively fixedly connected to the first piston tube (8) and the sliding rod (9).

4. The hydraulic jacking device for a gear hobbing machine according to claim 1, characterized in that: The first expansion tube (5) is provided with a first threaded rod (11), the first threaded rod (11) passes through the first piston tube (8) and is threadedly connected to the first piston tube (8), the first expansion tube (5) is provided with a second motor (12), the first threaded rod (11) is connected to the output end of the second motor (12).

5. The hydraulic jacking device of the gear hobbing machine according to claim 1, characterized in that: The mounting seat (1) is provided with a mounting plate (13), a rack (18) is provided in the mounting seat (1), a gear (17) is installed below the mounting plate (13), a cylinder (19) is provided in the mounting seat (1), a latching tooth (14) is provided above the mounting plate (13), three groups of annularly distributed moving seats (15) are provided above the mounting seat (1), three groups of sliding grooves (16) are opened on the mounting seat (1), a second expansion tube (20) is provided above the moving seat (15), the bottom of the roller cutter (2) is slidably connected with the second expansion tube (20), a second piston tube (21) is provided in the second expansion tube (20), the second piston tube (21) is slidably connected with the second expansion tube (20) through a slider (22), and a mounting frame (23) is provided in the second expansion tube (20).

6. The hydraulic jacking device for a gear hobbing machine according to claim 5, characterized in that: The mounting plate (13) is rotatably connected to the mounting seat (1) via a rotating shaft, the rack (18) is slidably connected to the mounting seat (1), the rack (18) is meshingly connected to the gear (17), the rack (18) is connected to the output end of the piston rod of the cylinder (19), the movable seat (15) is slidably connected to the mounting seat (1) via a sliding groove (16), and the movable seat (15) is meshingly connected to the mounting seat (1) via a latching tooth (14).

7. The hydraulic jacking device for a gear hobbing machine according to claim 5, characterized in that: A second threaded rod (24) is provided on the mounting frame (23), the second threaded rod (24) passes through the slider (22) and is threadedly connected to the slider (22), a third motor (25) is provided in the second expansion tube (20), and the lower end of the second threaded rod (24) is connected to the output end of the third motor (25).

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