A universal fixture for manual clamping of gear shaft hobbing

Abstract

The utility model discloses a gear shaft manual clamping hobbing universal clamp, its characterized in that: including base, elastic cover, compression sleeve, wherein elastic cover connection with the upper end of base, and compression sleeve is set up in the elastic cover outside, and the elastic cover has the axial direction expansion gap, and the elastic cover outside has the taper portion, the optical axis portion that connects gradually from top to bottom, the through hole of axial direction on compression sleeve, and the through hole includes taper extrusion hole section, smooth cylindrical hole section, thread hole section that connect gradually from top to bottom, wherein taper extrusion hole section and taper portion sliding fit, and smooth cylindrical hole section is on the guide shaft section of base upper portion sliding fit, and thread hole section and the outer thread section of base middle portion are screwed together. The utility model has the beneficial effects including: the simple structure of clamp, the low manufacturing cost can be adapted to the gear shaft hobbing processing of the hole of end face, and its clamping mode is simple, can realize manual clamping relaxation, need not single facility clamping drive device.

Description

Technical Field

[0001] This utility model relates to the field of clamps, specifically to a universal clamp for manually clamping gear shafts and hobbing gears. Background Technology

[0002] In the gear manufacturing industry, gear hobbing is one of the core processes in gear forming, and its machining accuracy directly affects the gear's meshing performance and transmission efficiency. Gear shaft parts, due to their combination of shaft structure and gear characteristics, require simultaneous assurance of shaft center positioning accuracy and gear tooth profile machining stability during clamping. Currently, fixtures used for gear hobbing mainly rely on hydraulic or pneumatic clamping devices. While these devices offer advantages such as high automation and uniform clamping force, they also have the following drawbacks:

[0003] 1. Complex structure and high cost: Hydraulic / pneumatic systems require additional power units, pipelines and control modules, resulting in a large overall size of the fixture and high installation and maintenance costs, which is not economically viable for small and medium-sized processing enterprises.

[0004] Second, limited versatility: Traditional fixtures are mostly designed for specific gear shaft specifications. When the workpiece diameter, length or tooth profile parameters change, special grippers need to be replaced or complex positioning modules need to be adjusted. The changeover time is long and it is difficult to adapt to the needs of multi-variety and small-batch production. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this utility model provides a universal gear shaft manual clamping hobbing fixture, which has a simple structure, low cost, and good versatility.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A universal clamping fixture for manually clamping gear hobbing shafts, characterized in that it comprises a base, an elastic sleeve, and a clamping sleeve, wherein the elastic sleeve is connected to the upper end of the base, the clamping sleeve is sleeved on the outside of the elastic sleeve, the elastic sleeve has an axial expansion gap, the outer side of the elastic sleeve has a tapered portion and a smooth shaft portion connected sequentially from top to bottom, the clamping sleeve has an axial through hole, the through hole includes a tapered extrusion hole section, a smooth cylindrical hole section, and a threaded hole section connected sequentially from top to bottom, wherein the tapered extrusion hole section slides in engagement with the tapered portion, the smooth cylindrical hole section slides in engagement with a guide shaft section on the upper part of the base, and the threaded hole section is threaded in engagement with an external thread section in the middle of the base.

[0008] Furthermore, the lower part of the base has a flange, on which a plurality of mounting holes are evenly distributed in a ring.

[0009] Furthermore, there is a clearance section between the guide shaft section and the external thread section.

[0010] Furthermore, the upper end of the base has a recessed platform, and the elastic sleeve has a boss that engages with the recessed platform. The elastic sleeve is secured to the base by axially arranged screws.

[0011] Furthermore, the lower outer side of the clamping sleeve has a radially arranged handle hole.

[0012] Furthermore, the number of expansion gaps is eight and they are evenly distributed on the circumferential surface of the elastic sleeve, and the length of each expansion gap is not less than four-fifths of the total length of the elastic sleeve.

[0013] The advantages of this utility model include: the fixture has a simple structure and low manufacturing cost; it can be adapted to gear hobbing of gear shafts with holes on the end face; its clamping method is simple; it can realize manual clamping and loosening without the need for a separate clamping drive device. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the elastic sleeve structure of this utility model. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] One such Figure 1-2 The gear shaft manual clamping hobbing universal fixture shown includes a base 1, an elastic sleeve 2, and a clamping sleeve 3. The elastic sleeve 2 is connected to the upper end of the base 1, and the clamping sleeve 3 is sleeved on the outside of the elastic sleeve 2. The elastic sleeve 2 has a clamping hole at its axis for clamping the workpiece. The elastic sleeve 2 has eight axial expansion gaps evenly distributed on its circumference. The length of each expansion gap is not less than four-fifths of the total length of the elastic sleeve 2, thus allowing for a large range of diameter variation in the inner hole of the elastic sleeve 2. The outer side of the elastic sleeve 2 has a tapered portion 21 and a smooth shaft portion 22 connected sequentially from top to bottom. The clamping sleeve 3 has an axially oriented through hole, which includes a tapered extrusion hole section 31, a smooth cylindrical hole section 32, and a threaded hole section 33 connected sequentially from top to bottom. The tapered extrusion hole section 31 is slidably engaged with the tapered portion 21. When the tapered extrusion hole section 31 and the tapered portion 21 slide relative to each other axially, the diameter of the shaft hole of the elastic sleeve 2 can be changed. The smooth cylindrical hole section 32 is slidably engaged with the guide shaft section 11 on the upper part of the base 1, thereby enabling the clamping sleeve 3 to move accurately without skewing. The threaded hole section 33 is threadedly engaged with the external thread section 13 in the middle of the base 1. Therefore, by rotating the clamping sleeve 3, the clamping sleeve 3 can be axially displaced relative to the elastic sleeve 2.

[0018] To facilitate the installation of the clamp on the lower part of the base 1, there is a flange 14, on which multiple mounting holes 15 are evenly distributed in a ring.

[0019] To reduce friction and simplify fixture processing, this embodiment includes a clearance section 12 between the guide shaft section 11 and the external thread section 13.

[0020] To ensure high coaxiality between the elastic sleeve 2 and the base 1 during installation, a recessed platform is provided on the upper end of the base 1. This platform can be cylindrical, square, or a regular polygon. The elastic sleeve 2 has a boss 23 that mates with the recessed platform. The elastic sleeve 2 is secured to the base 1 by axially arranged screws 4.

[0021] To facilitate the rotation of the clamping sleeve 3, the lower outer side of the clamping sleeve 3 in this embodiment has a radially arranged handle hole 35. The handle hole is a threaded hole into which a threaded handle rod can be inserted, or it can be used to hook a hooked wrench and rotate it by the hooked wrench.

[0022] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A universal clamping fixture for manually clamping gear shafts and hobbing gears, characterized in that: The device includes a base (1), an elastic sleeve (2), and a clamping sleeve (3). The elastic sleeve (2) is connected to the upper end of the base (1), and the clamping sleeve (3) is sleeved on the outside of the elastic sleeve (2). The elastic sleeve (2) has an axial expansion gap. The outer side of the elastic sleeve (2) has a tapered part (21) and a smooth shaft part (22) connected from top to bottom. The clamping sleeve (3) has an axial through hole. The through hole includes a tapered extrusion hole section (31), a smooth cylindrical hole section (32), and a threaded hole section (33) connected from top to bottom. The tapered extrusion hole section (31) is slidably engaged with the tapered part (21), the smooth cylindrical hole section (32) is slidably engaged with the guide shaft section (11) on the upper part of the base (1), and the threaded hole section (33) is threadedly engaged with the external thread section (13) in the middle of the base (1).

2. The universal gear hobbing clamp for manual clamping of gear shafts according to claim 1, characterized in that: The lower part of the base (1) has a flange (14), and the flange (14) has a plurality of mounting holes (15) evenly distributed in a ring.

3. The universal gear hobbing clamp for manual clamping of gear shafts according to claim 1, characterized in that: There is a clearance section (12) between the guide shaft section (11) and the external thread section (13).

4. A universal gear hobbing clamp for manual clamping of gear shafts according to claim 1, characterized in that: The base (1) has a recessed platform at its upper end, and the elastic sleeve (2) has a protrusion (23) at its bottom that engages with the recessed platform. The elastic sleeve (2) is secured to the base (1) by an axially arranged screw (4).

5. A universal gear hobbing clamp for manual clamping of gear shafts according to claim 1, characterized in that: The lower outer side of the clamping sleeve (3) has a radially arranged handle hole (35).

6. A universal gear hobbing clamp for manual clamping of gear shafts according to claim 1, characterized in that: The number of expansion gaps is 8 and they are evenly distributed on the circumference of the elastic sleeve (2). The length of each expansion gap is not less than four-fifths of the total length of the elastic sleeve (2).

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