Rapid clamping fixture of horizontal gear hobbing machine

Abstract

The utility model discloses a horizontal gear hobbing machine quick clamping fixture, and particularly relates to the technical field of clamping fixtures, the horizontal gear hobbing machine quick clamping fixture comprises a fixture body arranged on a horizontal gear hobbing machine main shaft, a round hole is formed in the rear end of the fixture body, a tip is arranged in the round hole, a round groove is formed in the front end of the fixture body, and the tip is arranged in the round groove. The front end of the center penetrates through the round hole and extends into the round groove, a floating sleeve is arranged in the round groove, a one-way clutch needle bearing is arranged in the floating sleeve and used for containing a part to be machined, and limiting grooves are formed in the inner wall of the top and the inner wall of the bottom of the round groove. The floating sleeve is driven to rotate through the clamp body, the limiting block and the limiting groove, the needle roller in the one-way clutch needle roller bearing makes contact with the outer circle of a part to generate friction force, then synchronous rotation of the part and the clamp body is achieved, machining of the part is completed, rapid clamping of shaft gear type parts can be achieved through the clamping clamp, and machining efficiency is improved. Part clamping is reliable and stable, operation is convenient, and machining quality is stable.

Description

Technical Field

[0001] The utility model relates to the technical field of clamping fixtures, in particular to a quick clamping fixture for a horizontal gear hobbing machine. Background Art

[0002] Gears are important basic parts of mechanical equipment. With the rapid development of the economy, the precision requirements of gears are constantly increasing, and high-precision gears have also ushered in a huge market space. In order to meet market demand, gear processing methods are also constantly updated. The gear hobbing method is currently the most widely used, efficient and relatively stable processing method. Providing the best part clamping method is a powerful measure to improve product processing efficiency, processing quality, reduce costs and increase efficiency, and the investment cost is relatively low and has a certain degree of versatility.

[0003] At present, the gear hobbing method basically adopts three clamping methods when processing shaft gear parts. The details are as follows:

[0004] 1. The most commonly used clamping method is the spring chuck clamping method, that is, the spring chuck clamps the outer circle of one end of the part, and the other end of the part is positioned and tightened by the tail center of the machine tool. This clamping method has no special requirements for the part structure. This clamping method is efficient and the processing process is stable, but it has high requirements for the outer circle accuracy of the part to be clamped, otherwise it will seriously affect the processing accuracy of the part. At the same time, the clamping datum is inconsistent with the product measurement and inspection datum. The center holes at both ends of the part are used as the positioning datum during measurement and inspection. Therefore, this clamping method will have a certain measurement and inspection error.

[0005] 2. End face driven clamping method. This clamping method uses an end face driven fixture. The tail tip of the gear hobbing machine applies a large axial pressure on the part axially, thereby forming a deep embedded straight groove on the end face of the part. Generally, there are 4-6 grooves to drive the part to rotate. This clamping method has high requirements for processing equipment. Not only must the tail tip have sufficient pressure, but the equipment rigidity must also meet the corresponding requirements. At the same time, it also has high requirements for the part structure. After the tail tip applies the corresponding pressure, the part cannot bend or deform, and the hardness of the part should not be too high, otherwise the teeth of the end face drive cannot be embedded in the end face of the part, or the embedding depth is insufficient, resulting in the end face drive fixture being separated from the end face of the part during the processing process. The straight grooves produced on the end face of the part processed using this clamping method directly affect the appearance quality of the part.

[0006] 3. Clamp-type clamping method: This clamping method uses a special clamp to tighten the screw to generate a large friction between the inner side of the clamp and the outer surface of the part, so that the clamp can drive the part to rotate. The lever on the horizontal gear hobbing machine spindle extends into the clamp lever groove, which ultimately drives the part to rotate. This clamping method requires high operator skills. If the screw is not applied to the corresponding torque requirement, the part will slip during processing, and there is a risk that the part and the horizontal gear hobbing machine spindle will rotate asynchronously.

[0007] Based on this, the utility model provides a quick clamping fixture for a horizontal gear hobbing machine which has high clamping efficiency for shaft gear parts and can improve the processing quality of parts. Summary of the invention

[0008] In view of this, the utility model provides a quick clamping fixture for a horizontal gear hobbing machine, which drives the floating sleeve to rotate through the clamping body, the limit block and the limit groove. The needle roller in the one-way clutch needle bearing contacts the outer circle of the part to generate friction, thereby realizing the synchronous rotation of the part and the clamping body to complete the processing of the part. The clamping fixture can realize the quick clamping of shaft gear parts, and the part clamping is reliable, stable, easy to operate, and the processing quality is stable, so as to solve the problems arising from the above-mentioned background technology.

[0009] The technical solution adopted by the utility model is: a quick clamping fixture for a horizontal gear hobbing machine, comprising a clamping body arranged on the main shaft of the horizontal gear hobbing machine, a circular hole being provided at the rear end of the clamping body, a top being provided inside the circular hole, a circular groove being provided at the front end of the clamping body, the front end of the top penetrating the circular hole and extending into the circular groove, a floating sleeve being provided inside the circular groove, a one-way clutch needle bearing being provided inside the floating sleeve for placing parts to be processed, limiting grooves being provided on the top inner wall and the bottom inner wall of the circular groove, limiting blocks matching the limiting grooves being fixedly provided on the top and bottom of the floating sleeve, the two limiting blocks being respectively provided in the two limiting grooves, an annular groove being provided on the inner wall surface of the circular groove, a retaining ring being inserted in the annular groove, and the retaining ring being provided in front of the floating sleeve.

[0010] Furthermore, the top is locked together with the clamp body through a hexagonal nut to improve the stability of the top. The front end of the top is processed with a conical surface, and the conical surface is effectively in contact with the top hole on the part.

[0011] Furthermore, gaps are provided between the floating sleeve and the circular groove, and between the limiting block and the limiting groove.

[0012] Furthermore, the clamp body is fixed to the main shaft of the horizontal gear hobbing machine by a plurality of hexagonal countersunk screws, and the plurality of hexagonal countersunk screws are distributed in a circular array on the clamp body, so as to facilitate the removal of the clamp body from the main shaft of the horizontal gear hobbing machine.

[0013] Furthermore, the front end top and the front end bottom of the clamp body are both provided with embedding grooves, electric push rods are fixed inside the two embedding grooves, and a moving plate is fixed at the front end of the electric push rods.

[0014] Furthermore, a round rod is fixedly provided at the front end of the movable plate, a baffle is movably sleeved on the round rod, and the rear end of the baffle is in contact with the front end of the baffle ring to improve the stability of the baffle ring.

[0015] Furthermore, threaded holes are provided on the outer walls of the front ends of the two round rods. Bolts are threadedly connected to the threaded holes. The bolts are in contact with the outer wall of the baffle plate and are used to fix the baffle plate to prevent the baffle plate from rotating and affecting the fixation of the retaining ring.

[0016] The beneficial effects of the utility model are as follows: the utility model drives the floating sleeve to rotate through the clamping body, the limit block and the limit groove, and the needle roller in the one-way clutch needle bearing contacts with the outer circle of the part to generate friction, thereby realizing the synchronous rotation of the part and the clamping body to complete the processing of the part. The clamping fixture can realize the rapid clamping of shaft gear parts, and the part clamping is reliable, stable, easy to operate and the processing quality is stable.

[0017] The floating sleeve is supported by the retaining ring, so that the stability of the floating sleeve can be improved, and the retaining ring is supported by two baffles, so that the stability of the retaining ring when in use can be further improved. After the electric push rod drives the moving plate to drive the baffle to move out of the circular groove, the baffle can be rotated to remove the retaining ring and the floating sleeve. The structure is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 For this utility model Figure 1 Enlarged view of part A in the middle;

[0020] Figure 3 This is a cross-sectional view of the clamp body of the utility model;

[0021] Figure 4 It is a partial schematic diagram of the utility model;

[0022] Figure 5 It is the front view of the floating sleeve of the utility model.

[0023] In the figure: 1. spindle of horizontal gear hobbing machine; 2. clamping base; 3. round hole; 4. center; 5. round groove; 6. floating sleeve; 7. needle roller bearing of one-way clutch; 8. parts; 9. limit groove; 10. limit block; 11. annular groove; 12. retaining ring; 13. hexagonal nut; 14. hexagonal countersunk screw; 15. embedded groove; 16. electric push rod; 17. moving plate; 18. round rod; 19. baffle; 20. threaded hole; 21. bolt. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figures 1 to 5 As shown, the quick clamping fixture of the horizontal gear hobbing machine includes a clamp body 2 arranged on the main shaft 1 of the horizontal gear hobbing machine. A circular hole 3 is opened at the rear end of the clamp body 2, and a top 4 is arranged inside the circular hole 3. The top 4 is locked together with the clamp body 2 through a hexagonal nut 13 to improve the stability of the top 4. The front end of the top 4 is processed with a conical surface, the angle of the conical surface is 60 degrees, and the conical surface is effectively in contact with the top hole on the part 8.

[0026] A circular groove 5 is provided at the front end of the clamp body 2. The front end of the top 4 passes through the circular hole 3 and extends into the circular groove 5. A floating sleeve 6 is provided inside the circular groove 5. A one-way clutch needle bearing 7 is provided inside the floating sleeve 6 for placing the part 8 to be processed. Limiting grooves 9 are provided on the top inner wall and the bottom inner wall of the circular groove 5. Limiting blocks 10 adapted to the limiting grooves 9 are fixedly provided at the top and bottom of the floating sleeve 6, and the two limiting blocks 10 are respectively provided in the two limiting grooves 9. A gap of 0.1 mm is provided between the floating sleeve 6 and the circular groove 5, and between the limiting blocks 10 and the limiting grooves 9.

[0027] An annular groove 11 is formed on the inner wall surface of the circular groove 5. A retaining ring 12 is inserted into the annular groove 11, and the retaining ring 12 is arranged in front of the floating sleeve 6. The clamp body 2 is fixed to the horizontal gear hobbing machine spindle 1 by a plurality of hexagonal countersunk screws 14, and the plurality of hexagonal countersunk screws 14 are distributed in an annular array on the clamp body 2, so as to facilitate the removal of the clamp body 2 from the horizontal gear hobbing machine spindle 1.

[0028] When in use, first install the floating sleeve 6 into the circular groove 5, and then insert the part 8 into the one-way clutch needle bearing 7 in the floating sleeve 6. Then install the top 4 into the circular hole 3 at the rear end of the clamp body 2, and adjust the position of the top 4 to ensure that the conical surface at the front end of the top 4 is in effective contact with the top hole on the part 8, so as to play the role of center positioning and axial limiting of the part 8. At the same time, the top 4 is locked with the hexagonal nut 13 to ensure that the top 4 is installed reliably. The horizontal gear hobbing machine spindle 1 drives the clamp body 2 to rotate, and the clamp body 2 drives the floating sleeve 6 to rotate through the limit block 10 and the limit groove 9. The needle roller in the one-way clutch needle bearing 7 contacts the outer circle of the part 8 to generate friction, thereby realizing the synchronous rotation of the part 8 and the clamp body 2, and completing the processing of the part 8. After the processing is completed, the tail top 4 of the horizontal gear hobbing machine spindle 1 returns to the original position, takes out the processed part 8, and loads the new part 8 according to the above operation method for cyclic processing.

[0029] like Figures 1 to 5As shown, the front end top and the front end bottom of the clamp body 2 are both provided with an embedding groove 15. An electric push rod 16 is fixed inside the two embedding grooves 15, a moving plate 17 is fixed at the front end of the electric push rod 16, a round rod 18 is fixed at the front end of the moving plate 17, a baffle 19 is movably sleeved on the round rod 18, and the rear end of the baffle 19 contacts the front end of the retaining ring 12 to improve the stability of the retaining ring 12.

[0030] The outer walls of the front ends of the two round rods 18 are provided with threaded holes 20 , and bolts 21 are connected to the inner threads of the threaded holes 20 . The bolts 21 contact the outer wall of the baffle 19 to fix the baffle 19 and prevent the baffle 19 from rotating to affect the fixation of the retaining ring 12 .

[0031] By setting a retaining ring 12 in the circular groove 5 and using the retaining ring 12 to resist the floating sleeve 6, the stability of the floating sleeve 6 can be improved, and two baffles 19 are set on the clamp body 2. When the baffles 19 are in contact with the retaining ring 12, the stability of the retaining ring 12 during use can be improved. When the floating sleeve 6 needs to be disassembled, the electric push rod 16 is first used to drive the moving plate 17 to move forward. After the baffle 19 is moved out of the circular groove 5, the bolt 21 can be loosened to rotate the baffle 19 to move it above the circular groove 5, and the floating sleeve 6 can be disassembled and replaced. When reinstalling, the baffle 19 is first rotated to move in front of the retaining ring 12, and then the electric push rod 16 is used to drive the moving plate 17 to retract, so that the baffle 19 can be pressed against the front end of the retaining ring 12. The structure is simple and the operation is convenient.

Claims

1. Horizontal gear hobbing machine quick clamping fixture, characterized by: It comprises a clamp body (2) arranged on a main shaft (1) of a horizontal gear hobbing machine, wherein a circular hole (3) is provided at the rear end of the clamp body (2), a tip (4) is provided inside the circular hole (3), a circular groove (5) is provided at the front end of the clamp body (2), and the front end of the tip (4) penetrates the circular hole (3) and extends into the circular groove (5); A floating sleeve (6) is provided inside the circular groove (5), and a one-way clutch needle bearing (7) is provided inside the floating sleeve (6) for placing a part (8) to be processed. Limiting grooves (9) are provided on the top inner wall and the bottom inner wall of the circular groove (5), and limiting blocks (10) adapted to the limiting grooves (9) are fixedly provided on the top and the bottom of the floating sleeve (6), and the two limiting blocks (10) are respectively provided in the two limiting grooves (9); An annular groove (11) is provided on the inner wall surface of the circular groove (5), a retaining ring (12) is inserted into the annular groove (11), and the retaining ring (12) is arranged in front of the floating sleeve (6).

2. The quick clamping fixture for horizontal gear hobbing machine according to claim 1 is characterized in that: The top point (4) is locked together with the clamp body (2) through a hexagonal nut (13), thereby improving the stability of the top point (4); a conical surface is processed at the front end of the top point (4), and the conical surface is in effective contact with the top point hole on the part (8).

3. The quick clamping fixture for horizontal gear hobbing machine according to claim 1 is characterized in that: Gaps are provided between the floating sleeve (6) and the circular groove (5), and between the limiting block (10) and the limiting groove (9).

4. The quick clamping fixture for a horizontal gear hobbing machine according to claim 1, characterized in that: The clamp body (2) is fixed to the horizontal gear hobbing machine main shaft (1) via a plurality of hexagonal countersunk screws (14); the plurality of hexagonal countersunk screws (14) are distributed in a circular array on the clamp body (2), making it easy to disassemble the clamp body (2).

5. The quick clamping fixture for a horizontal gear hobbing machine according to claim 1, characterized in that: The front end top and the front end bottom of the clamp body (2) are both provided with embedding grooves (15), electric push rods (16) are fixedly arranged inside the two embedding grooves (15), and a moving plate (17) is fixedly arranged at the front end of the electric push rod (16).

6. The quick clamping fixture for a horizontal gear hobbing machine according to claim 5, characterized in that: A round rod (18) is fixedly provided at the front end of the movable plate (17), a baffle (19) is movably sleeved on the round rod (18), and a rear end of the baffle (19) contacts the front end of the baffle ring (12) to improve the stability of the baffle ring (12).

7. The quick clamping fixture for a horizontal gear hobbing machine according to claim 6, characterized in that: The front end outer walls of the two round rods (18) are each provided with a threaded hole (20), the inner threads of the threaded holes (20) are connected with bolts (21), and the bolts (21) are in contact with the outer wall of the baffle (19) for fixing the baffle (19).

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