A kind of main reduction gear intermediate hole machining clamp

Abstract

The utility model discloses a kind of clamps for main reduction gear middle hole processing, including the mounting base being installed on lathe, multiple clamp units for clamping main reduction gear are arranged on the mounting base with interval, the clamp unit includes the three-jaw chuck being set on mounting base, the movable block of the three-jaw chuck is provided with clamping female jaw, clamping female jaw is provided with clamping male jaw for being contacted with the part to be processed to realize clamping by mounting structure, the three-jaw chuck is provided with positioning block for the end surface positioning of the part to be processed. Clamping male jaw and clamping female jaw are provided, so that during maintenance replacement, only clamping male jaw outside three-jaw chuck with iron ring can be used, three-jaw chuck does not need to be opened, so that maintenance difficulty can be effectively reduced, and three-jaw chuck inside can also be guaranteed not to enter impurities during maintenance.

Description

Technical Field

[0001] This utility model belongs to the technical field of gear reduction equipment, specifically relating to a fixture for machining the intermediate hole of a main gear reduction gear. Background Technology

[0002] In the machining of reduction gears, the outer cylindrical surface of the reduction gear needs to be clamped while the inner hole is machined. Currently, a three-jaw chuck is mainly used to clamp and fix the outer cylindrical surface of the reduction gear. Due to the high requirements for the shape of the outer cylindrical surface of the reduction gear, damage is unacceptable. In actual operation, iron filings are generated during inner hole machining. These filings can damage the clamping blocks of the three-jaw chuck, resulting in damage to the outer cylindrical surface of the reduction gear. Therefore, the clamping blocks of the three-jaw chuck need to be replaced frequently. However, during replacement, the clamping blocks need to be inserted into the three-jaw chuck and installed with its movable block. This installation structure makes replacement cumbersome, and after each replacement, care must be taken to ensure that no impurities enter the three-jaw chuck. Utility Model Content

[0003] This utility model proposes to provide a fixture for machining the intermediate hole of the main reduction gear, which can not only clamp and position the reduction gear, but also facilitate maintenance and replacement.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a fixture for machining the intermediate hole of a main reduction gear, including a mounting base mounted on a lathe, wherein a plurality of fixture units for clamping the main reduction gear are spaced apart on the mounting base, the fixture unit including a three-jaw chuck mounted on the mounting base, a clamping female jaw is provided on the movable block of the three-jaw chuck, and a clamping female jaw is provided on the clamping female jaw through a mounting structure for contacting and clamping with the workpiece to be machined, and a positioning block for positioning the end face of the workpiece to be machined is provided on the three-jaw chuck.

[0005] As a preferred embodiment of the above scheme, the clamping female jaw is L-shaped, and the vertical section is located on the side of the horizontal section away from the center of the three-jaw chuck. The vertical section is arc-shaped in the vertical direction. The mounting structure includes fixing bolts for fixing the clamping male jaw and the clamping female jaw, and a step provided in the vertical section. The clamping male jaw is arc-shaped, and the outer side of the clamping male jaw is in close contact with the inner side of the vertical section. The vertical section is provided with a mounting through hole, and the clamping male jaw is provided with a mounting threaded hole. The fixing bolt passes through the mounting through hole from the outer side and is tightened in the mounting threaded hole.

[0006] Further preferably, the roundness of both the inner and outer surfaces of the clamping claws does not exceed 0.025 mm.

[0007] Further preferably, the positioning block is provided with a ⊥-shaped block.

[0008] The beneficial effects of this utility model are:

[0009] 1) It is equipped with clamping male jaws and clamping female jaws, so that during maintenance and replacement, only the clamping male jaws outside the three-jaw chuck need to be located when the iron ring is located, without having to open the three-jaw chuck. This can effectively reduce the difficulty of maintenance, and at the same time ensure that no impurities will enter the three-jaw chuck during maintenance.

[0010] 2) Multiple clamping units are provided, which can process multiple parts at once, thus improving efficiency. At the same time, by ensuring the roundness of the clamping jaws, the clamping accuracy of the deceleration gear can be effectively guaranteed. In addition, this application can not only clamp the deceleration gear from the outside through the clamping jaws, but also provides a positioning block for positioning the end face of the part to be processed, thereby effectively fixing the deceleration gear and reducing the machining error of the inner hole of the deceleration gear. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the present invention.

[0012] Reference numerals: Mounting base - 10, Three-jaw chuck - 20, Clamping female jaw - 30, Step - 31, Clamping female jaw - 40, Positioning block - 50. Detailed Implementation

[0013] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0014] like Figure 1 As shown, a fixture for machining the intermediate hole of a main reduction gear mainly consists of a mounting base 10 and multiple fixture units, wherein the multiple fixture units are spaced apart on the mounting base 10. The mounting base 10 is used to mount the entire fixture on a lathe, and each fixture unit can clamp a main reduction gear accordingly.

[0015] To achieve clamping of the fixture unit, the fixture unit includes a three-jaw chuck 20 mounted on a mounting base. A clamping female jaw 30 is provided on the movable block of the three-jaw chuck 20, and a clamping female jaw 40 is provided on the clamping female jaw 30 via a mounting structure for contacting and clamping the workpiece to be processed. The reduction gear is clamped from the outside by the clamping female jaw.

[0016] Preferably, the clamping female jaw 30 is L-shaped, with its vertical section positioned on the side of the horizontal section away from the center of the three-jaw chuck. The vertical section of the vertical segment has an arc-shaped cross-section, and the clamping male jaw 40 is also arc-shaped. To facilitate the installation of the clamping male jaw, the mounting structure includes fixing bolts for securing the clamping male jaw 40 and the clamping female jaw 30, and a step 31 on the vertical section. The outer surface of the clamping male jaw 40 is tightly fitted to the inner surface of the vertical section. To secure the clamping male jaw to the clamping female jaw, a mounting through hole is provided on the vertical section, and a mounting threaded hole is provided on the clamping male jaw 40. The fixing bolt passes through the mounting through hole from the outer surface and is then tightened into the mounting threaded hole.

[0017] To ensure a tight clamping effect, the thickness of the clamping jaws is greater than the width of the step. To ensure clamping accuracy, the roundness of both the inner and outer surfaces of the clamping jaws 40 does not exceed 0.025mm.

[0018] To ensure positioning during clamping, a positioning block 50 is provided on the three-jaw chuck 20 for positioning the end face of the workpiece to be processed. The positioning block 50 is provided with a ⊥-shaped block, the bottom surface of which is used for mounting with the three-jaw chuck, and the top surface of the vertical section is used for positioning the end face of the deceleration gear. There are three positioning blocks, which are staggered with the clamping jaws.

Claims

1. A fixture for machining the intermediate hole of a main reduction gear, characterized in that: The device includes a mounting base (10) installed on a lathe. The mounting base (10) is provided with a plurality of clamping units for clamping the main reduction gear at intervals. The clamping unit includes a three-jaw chuck (20) provided on the mounting base. The movable block of the three-jaw chuck (20) is provided with a clamping female jaw (30). The clamping female jaw (30) is provided with a clamping female jaw (40) for contacting the workpiece to be processed and clamping it through a mounting structure. The three-jaw chuck (20) is provided with a positioning block (50) for positioning the end face of the workpiece to be processed.

2. The fixture for machining the intermediate hole of the main reduction gear as described in claim 1, characterized in that: The clamping female jaw (30) is L-shaped, and the vertical section is located on the side of the horizontal section away from the center of the three-jaw chuck. The vertical section is arc-shaped in the vertical direction. The mounting structure includes fixing bolts for fixing the clamping male jaw (40) and the clamping female jaw (30) and a step (31) on the vertical section. The clamping male jaw (40) is arc-shaped, and the outer side of the clamping male jaw (40) is tightly fitted with the inner side of the vertical section. The vertical section is provided with a mounting through hole, and the clamping male jaw (40) is provided with a mounting threaded hole. The fixing bolt passes through the mounting through hole from the outer side and is tightened in the mounting threaded hole.

3. The fixture for machining the intermediate hole of the main reduction gear according to claim 2, characterized in that: The roundness of the inner and outer surfaces of the clamping claw (40) does not exceed 0.025 mm.

4. The fixture for machining the intermediate hole of the main reduction gear as described in claim 1, characterized in that: The positioning block (50) is provided with a ⊥-shaped block.

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