A gapless gear shaving jig

Abstract

The utility model discloses a kind of gapless gear shaving clamps, including baffle, elastic sleeve, mandrel and taper core sleeve, the baffle one end is provided with mounting groove, and mounting groove is provided with a plurality of first threaded holes, for cooperating screw installation elastic sleeve;The elastic sleeve outside sleeve connects the gear to be processed, and the inner surface of elastic sleeve is taper face;The mandrel one end outside sleeve connects with taper core sleeve, and the taper of taper core sleeve outer surface is matched with the taper face of elastic sleeve and is composed of wedge structure;There are a plurality of first spring holes on the mandrel along the circumference, and there are a plurality of second spring holes on the end of taper core sleeve along the circumference, for setting spring between mandrel and taper core sleeve.The utility model is through the expansion sleeve of clamp self, need not to correct workpiece when operating and can be clamped and processed, processing precision is guaranteed by this device, reduces the processing error caused by personal factor, and it is reasonable in design, and processing precision is high.

Description

Technical Field

[0001] This utility model relates to the field of small gear shaving technology, and in particular to a backlash-free gear shaving fixture. Background Technology

[0002] When gears need to be shaved, the original clamping method is to mount the gear on the mandrel, hold the two ends of the gear with pressure sleeves, and then place it on the shaving machine for processing. However, the original fixture has a gap between the inner hole of the gear and the mandrel, which leads to low shaving accuracy. In addition, the mandrel is a solid structure, which is heavy and increases the labor intensity of employees. Utility Model Content

[0003] To address the problem of low shaving accuracy caused by gaps between the gear inner hole and the mandrel in the existing fixtures, this invention provides a gapless gear shaving fixture.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A backlash-free gear shaving fixture includes a retaining ring, an elastic sleeve, a mandrel, and a tapered core sleeve. One end of the retaining ring has a mounting groove with multiple first threaded holes for mounting the elastic sleeve with screws. The elastic sleeve has a gear to be machined fitted on its outer side, and its inner surface is tapered. A tapered core sleeve is fitted onto the outer side of one end of the mandrel, and the tapered outer surface of the tapered core sleeve mates with the tapered surface of the elastic sleeve to form a wedge-shaped structure. The mandrel has multiple first spring holes evenly distributed circumferentially, and the tapered core sleeve has multiple second spring holes evenly distributed circumferentially at its end for placing springs between the mandrel and the tapered core sleeve. The end of the tapered core sleeve furthest from the second spring holes has multiple third threaded holes, and a retaining plate is connected to these third threaded holes with screws. The retaining plate is slidably connected to a groove at the end of the mandrel.

[0005] Preferably, both the retaining ring and the mandrel have internal cavities, and both the retaining ring and the mandrel are T-shaped to reduce their weight and facilitate use.

[0006] Preferably, the end of the mandrel that is in contact with the gear to be processed has a plurality of second threaded holes evenly distributed circumferentially, and the second threaded holes are fitted with screws to connect an annular pressure cap for pressing the gear to be processed.

[0007] Preferably, the slot is an annular slot, and the corresponding card plate is set as two semi-annular plates.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses the expansion sleeve that comes with the fixture, so the workpiece can be clamped and processed without the need for correction during operation. The processing accuracy is guaranteed by this device, reducing the processing error caused by personal factors. The design is reasonable and the processing accuracy is high. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the retaining ring according to an embodiment of the present utility model; Figure 3 This is a cross-sectional view of the elastic sleeve according to an embodiment of the present invention; Figure 4 This is a cross-sectional and side view schematic diagram of the card plate according to an embodiment of the present utility model; Figure 5 This is a cross-sectional and side view schematic diagram of the tapered core sleeve according to an embodiment of the present utility model; Figure 6 This is a cross-sectional view of the cap according to an embodiment of the present invention; Figure 7 This is a cross-sectional view of the mandrel in an embodiment of the present invention; Figure 8 This is a schematic diagram of pressing the gear to be processed in an embodiment of the present invention.

[0010] In the diagram: 1. Retaining ring, 101. First threaded hole, 102. Mounting groove, 2. Screw, 3. Elastic sleeve, 301. First countersunk hole, 302. Tapered surface, 4. Mandrel, 401. Second threaded hole, 402. First spring hole, 403. Slot, 5. Tapered mandrel, 501. Third threaded hole, 502. Second spring hole, 6. Pressure cap, 601. Second countersunk hole, 7. Spring, 8. Clamping plate, 801. Through hole, 9. Gear to be machined. Detailed Implementation

[0011] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0013] like Figures 1 to 7As shown, this utility model embodiment includes a retaining ring 1, an elastic sleeve 3, a mandrel 4, and a tapered core sleeve 5. One end of the retaining ring 1 is provided with a mounting groove 102, and the mounting groove 102 has multiple first threaded holes 101 for mounting the elastic sleeve 3 with screws 2. The outer side of the elastic sleeve 3 is fitted with a gear 9 to be machined, and the inner surface of the elastic sleeve 3 is a tapered surface 302. One end of the mandrel 4 is fitted with a tapered core sleeve 5, and the tapered outer surface of the tapered core sleeve 5 matches the tapered surface 302 of the elastic sleeve 3 to form a wedge-shaped structure. Several first spring holes 402 are evenly distributed circumferentially on the mandrel 4, and several second spring holes 502 are evenly distributed circumferentially at the end of the tapered core sleeve 5 for placing a spring 7 between the mandrel 4 and the tapered core sleeve 5. Multiple third threaded holes 501 are provided at the end of the tapered core sleeve 5 away from the second spring holes 502, and the third threaded holes 501 are connected to a retaining plate 8 with screws 2. The retaining plate 8 is slidably connected to a retaining groove 403 at the end of the mandrel 4.

[0014] Preferably, both the retaining ring 1 and the spindle 4 have cavities inside, and both the retaining ring 1 and the spindle 4 are T-shaped to reduce their weight and facilitate use.

[0015] Preferably, the end of the mandrel 4 that is in contact with the gear 9 to be processed has several second threaded holes 401 evenly distributed circumferentially. The second threaded holes 401 are connected to an annular pressure cap 6 with screws 2 to press the gear 9 to be processed.

[0016] Preferably, the slot 403 is an annular slot, and the corresponding card plate 8 is set as two semi-annular plates.

[0017] Place the gear 9 to be processed onto the elastic sleeve 3. Hold the retaining ring 1 with your left hand, and insert the mandrel 4, which is assembled with the tapered core sleeve 5, spring 7, and pressure cap 6, into the elastic sleeve 3 with your right hand. The spring 7 pushes the tapered core sleeve 5 to expand the elastic sleeve 3. First, center the gear 9 to be processed to eliminate the gap between the gear 9 and the elastic sleeve 3. Then, use the pressure cap 6 to press the end face of the gear 9 to be processed tightly. After assembly, as shown... Figure 8 As shown in the diagram; then place the entire assembly on the gear shaving machine's worktable, start the machine, and insert the two centers of the machine into the center holes of the retaining ring 1 and the mandrel 4. The retaining ring 1 and the pressure cap 6 press against the two end faces of the gear 9 to be processed, as shown. Figure 1 The machine is positioned as shown, and then gear shaving can begin. After machining is complete, the two centers of the machine tool loosen the retaining ring 1 and the mandrel 4. At this time, the mandrel 4 is pulled out of the elastic sleeve 3, and the tapered mandrel 5 is disengaged from the elastic sleeve 3 under the action of the clamping plate 8. The pressure cap 6 and the elastic sleeve 3 are both assembled with screws 2 for easy replacement after wear.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A backlash-free gear shaving fixture, characterized in that: The device includes a retaining ring, an elastic sleeve, a mandrel, and a tapered core sleeve. One end of the retaining ring has a mounting groove with multiple first threaded holes for mounting the elastic sleeve with screws. The elastic sleeve has a gear to be machined on its outer side, and its inner surface is tapered. One end of the mandrel has a tapered core sleeve fitted onto its outer side; the tapered outer surface of the tapered core sleeve and the tapered surface of the elastic sleeve form a wedge-shaped structure. The mandrel has several first spring holes evenly distributed circumferentially, and the tapered core sleeve has several second spring holes evenly distributed circumferentially at its end for placing springs between the mandrel and the tapered core sleeve. The end of the tapered core sleeve furthest from the second spring holes has multiple third threaded holes, and these third threaded holes are connected to a retaining plate with screws. The retaining plate is slidably connected to a groove at the end of the mandrel.

2. The backlash-free gear shaving fixture according to claim 1, characterized in that: Both the retaining ring and the mandrel have internal cavities, and both are T-shaped to reduce their weight and facilitate use.

3. The backlash-free gear shaving fixture according to claim 1, characterized in that: The end of the mandrel that is in contact with the gear to be processed has several second threaded holes evenly distributed circumferentially. The second threaded holes are connected to an annular pressure cap with screws to press the gear to be processed.

4. The backlash-free gear shaving fixture according to claim 1, characterized in that: The slot is an annular groove, and the corresponding card plate is set as two semi-annular plates.

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