A clamp for a gear hobbing machine

Abstract

This utility model provides a fixture for a gear shaping machine, belonging to the technical field of gear shaping machines; it includes: a mounting base, an annular positioning structure mounted on the upper wall of the mounting base, three sets of side wall positioning structures mounted on the upper wall of the annular positioning structure, a linkage rod structure mounted on the upper wall of the mounting base, and two downward clamping structures mounted on the upper wall of the linkage rod structure; the annular positioning structure includes: two annular support plates, an annular positioning platform, several annular positioning screws, and several annular positioning balls; the two annular support plates are respectively mounted on the upper wall of the mounting base; this utility model applies two identical downward pressures to the blank workpiece through the linkage structure and the downward clamping structure, ensuring the stability of the blank workpiece; and through six-point positioning, it perfectly realizes the restriction of six degrees of freedom, avoiding over-constraint, thereby ensuring the processing accuracy of the gear shaping machine.

Description

Technical Field

[0001] This utility model belongs to the technical field of gear shaping machines, and specifically relates to a fixture for gear shaping machines. Background Technology

[0002] A gear shaper is a metal cutting machine tool that uses the meshing motion of a shaper cutter and a workpiece to machine internal and external spur gears, helical gears, and other toothed parts using the generating method. Its core principle is that the reciprocating cutting motion of the cutter and the rotational motion of the workpiece form an involute tooth profile, while radial feed completes the full tooth depth machining. Machining accuracy can reach grades 7 to 5, and the maximum workpiece diameter can reach 12 meters. It is widely used in high-precision gear manufacturing in the automotive, aerospace, and other fields.

[0003] When machining a blank, a fixture is needed to fix the relative position of the blank and the gear shaper. For example, a tooling fixture for a gear shaper with announcement number CN220050316U can fix the blank on the gear shaper and facilitate internal gear machining. This fixture can fix blanks of different sizes, which improves the applicability of the fixture. However, the fixture does not provide a stable clamping force, and with one plane positioning and four line positioning, there is an over-constraint situation, which leads to inaccurate positioning of the blank and thus insufficient machining accuracy. Utility Model Content

[0004] To address the problem of over-constraint in the existing technology, which leads to inaccurate positioning of the blank and consequently insufficient machining accuracy, this utility model provides a fixture for a gear shaping machine. It employs six-point positioning to restrict six degrees of freedom, thus avoiding over-constraint. The specific technical solution is as follows: A fixture for a gear shaping machine includes: a mounting base; an annular positioning structure is mounted on the upper wall of the mounting base; three sets of side wall positioning structures are mounted on the upper wall of the annular positioning structure; a linkage rod structure is mounted on the upper wall of the mounting base; and two lower... A clamping structure is provided; the annular positioning structure includes: two annular support plates, an annular positioning platform, several annular positioning screws, and several annular positioning balls; the two annular support plates are respectively installed on the upper wall of the mounting base, the annular positioning platform is installed on the upper wall of the two annular support plates, the upper wall of the annular positioning platform is provided with several threaded through holes, the several annular positioning screws are respectively installed in the threaded through holes of the annular positioning platform through threads, the several annular positioning balls are respectively installed on the upper wall of the annular positioning screws, and the upper wall of the annular positioning platform is provided with several open slots.

[0005] Preferably, the three sets of sidewall positioning structures include: a side positioning support plate, a side positioning screw, and a side positioning ball; the side positioning support plate is installed on the upper wall of the annular positioning platform, the side wall of the side positioning support plate has a threaded through hole, the side positioning screw is threadedly installed in the threaded through hole of the side positioning support plate, and the side positioning ball is installed on the inner wall of the side positioning screw.

[0006] Preferably, the linkage rod structure includes: a linkage semi-ring seat and two downward pressure rods; the linkage semi-ring seat is movably mounted on the upper wall of the mounting base via a hinge, and the two downward pressure rods are respectively movably mounted at both ends of the linkage semi-ring seat via hinges, and the two downward pressure rods pass through the open slot of the annular positioning platform, and the upper ends of the two downward pressure rods are provided with threads.

[0007] Preferably, the two downward clamping structures include: a clamping plate, an auxiliary support screw, an auxiliary support ball, and a downward nut; the clamping plate is movably fitted onto the outside of the downward nut, the upper wall of the clamping plate has a threaded through hole, the auxiliary support screw is movably installed in the threaded through hole of the clamping plate through a thread, the auxiliary support ball is installed on the lower wall of the auxiliary support screw, and the downward nut is movably installed on the outside of the thread of the downward nut through a thread.

[0008] Preferably, a clamping pad is installed on the lower wall surface of the clamping plate.

[0009] Preferably, four mounting bases are mounted on the side wall of the mounting base.

[0010] The present invention discloses a fixture for a gear shaping machine. Compared with the prior art, the fixture has the following advantages: the fixture applies two identical downward pressures to the blank through a linkage structure and a pressing structure, ensuring the stability of the blank; and through six-point positioning, it perfectly realizes the restriction of six degrees of freedom, avoiding over-constraint, thereby ensuring the processing accuracy of the gear shaping machine. Attached Figure Description

[0011] Figure 1 A schematic diagram of the overall structure of the fixture for a gear hobbing machine provided by this utility model;

[0012] Figure 2 This is a partial structural diagram of the fixture for a gear hobbing machine provided by this utility model.

[0013] Figure 3 This is a partial structural diagram of the fixture for a gear hobbing machine provided by this utility model.

[0014] Figure 4 An exploded view of the positioning structure of the fixture for a gear hobbing machine provided by this utility model;

[0015] in, Figures 1 to 4 The reference numerals and components for the gear hobbing machine fixture are as follows: 1. Mounting base; 2. Annular support plate; 3. Annular positioning platform; 4. Annular positioning screw; 5. Annular positioning ball; 6. Side positioning support plate; 7. Side positioning screw; 8. Side positioning ball; 9. Linkage semi-annular seat; 10. Downward pressure rod; 11. Clamping plate; 12. Auxiliary support screw; 13. Auxiliary support ball; 14. Downward pressure nut; 15. Clamping pad; 16. Mounting seat. Detailed Implementation

[0016] The following are specific implementation cases and appendices. Figures 1-4 The present invention will be further described, but it is not limited to these embodiments. The present invention provides a technical solution: a clamp for a gear hobbing machine, comprising: a mounting base 1, an annular positioning structure mounted on the upper wall of the mounting base 1, three sets of side wall positioning structures mounted on the upper wall of the annular positioning structure, a linkage rod structure mounted on the upper wall of the mounting base 1, and two downward clamping structures mounted on the upper wall of the linkage rod structure; the annular positioning structure comprises: two annular support plates 2, an annular positioning platform 3, several annular positioning screws 4, and several annular positioning balls 5; the two annular support plates 2 are respectively mounted on the upper wall of the mounting base 1, the annular positioning platform 3 is mounted on the upper wall of the two annular support plates 2, several threaded through holes are opened on the upper wall of the annular positioning platform 3, several annular positioning screws 4 are respectively movably mounted in the threaded through holes of the annular positioning platform 3 through threads, several annular positioning balls 5 are respectively mounted on the upper wall of the annular positioning screws 4, several open slots are opened on the upper wall of the annular positioning platform 3, and four mounting seats 16 are mounted on the side wall of the mounting base 1.

[0017] As a preferred embodiment, the three sets of side wall positioning structures further include: a side positioning support plate 6, a side positioning screw 7, and a side positioning ball 8; the side positioning support plate 6 is installed on the upper wall of the annular positioning platform 3, and the side wall of the side positioning support plate 6 is provided with a threaded through hole, the side positioning screw 7 is installed in the threaded through hole of the side positioning support plate 6 by thread, and the side positioning ball 8 is installed on the inner wall of the side positioning screw 7.

[0018] As a preferred embodiment, the linkage rod structure further includes: a linkage semi-ring seat 9 and two pressing rods 10; the linkage semi-ring seat 9 is hinged and movably mounted on the upper wall of the mounting base 1, and the two pressing rods 10 are hinged and movably mounted at both ends of the linkage semi-ring seat 9, and the two pressing rods 10 pass through the open slot of the annular positioning platform 3, and the upper ends of the two pressing rods 10 are provided with threads.

[0019] As a preferred embodiment, the two downward clamping structures further include: a clamping plate 11, an auxiliary support screw 12, an auxiliary support ball 13, and a downward nut 14; the clamping plate 11 is movably fitted onto the outside of the downward rod 10, and a threaded through hole is provided on the upper wall of the clamping plate 11. The auxiliary support screw 12 is movably installed in the threaded through hole of the clamping plate 11 through the thread, the auxiliary support ball 13 is installed on the lower wall of the auxiliary support screw 12, the downward nut 14 is movably installed on the outside of the thread of the downward rod 10 through the thread, and a clamping pad 15 is installed on the lower wall of the clamping plate 11.

[0020] Working principle: Before using this utility model, the device needs to be installed in the gear hobbing machine. The operator fixes the four mounting seats 16 on the worktable of the gear hobbing machine with screws, thus completing the installation work.

[0021] Next, the operator places the workpiece to be processed on the upper wall of several annular positioning balls 5, and aligns the upper surface of the workpiece using a dial indicator. The operator then adjusts the relative position of the annular positioning screw 4 within the annular positioning platform 3 by turning the annular positioning screw 4, which adjusts the relative height of the annular positioning balls 5, until the upper wall of the workpiece meets the processing requirements. The several annular positioning balls 5 form a plane, enabling three degrees of freedom positioning of the lower wall of the workpiece: X-rotation, Y-rotation, and Z-movement.

[0022] Next, the operator simultaneously adjusts the relative positions of the two side positioning screws 7 inside the side positioning support plate 6, thereby determining the positions of the two side positioning balls 8, thus completing the positioning of the blank's side wall and further restricting the two degrees of freedom, X and Y movement. Then, the operator adjusts the relative position of the last side positioning ball 8 using the side positioning screws 7 to perform process positioning on the blank, such as positioning the external process attachments of the blank, thereby restricting the rotation of the last degree of freedom, Z. At this point, all six degrees of freedom of the blank are positioned, thus completing the positioning work.

[0023] Next, the operator snaps the clamping plate 11 back onto the outside of the lower pressure rod 10, allowing the clamping pad 15 of the clamping plate 11 to contact the blank. The operator then adjusts the relative position of the auxiliary support ball 13 and the clamping plate 11 by rotating the auxiliary support screw 12, ensuring the clamping plate 11 is horizontal. Next, the operator threadedly installs the lower pressure nut 14 onto the outside of the lower pressure rod 10, applying a downward clamping force to the blank. The two lower pressure rods 10 are linked and balanced by the linkage semi-ring seat 9, ensuring that the two clamping plates 11 apply the same downward pressure, thus maintaining the blank's balance.

[0024] The two clamping plates 11 can apply the same downward force. The linkage semi-ring seat 9 can rotate by a hinge. When one of the downward pressure rods 10 is driven by the downward pressure nut 14, it generates a greater pulling force, which causes the linkage semi-ring seat 9 to rotate around the hinge axis, thereby causing the other end of the downward pressure rod 10 to be subjected to a greater pulling force. In the equilibrium state, the pulling forces of the two downward pressure rods 10 are the same. Because the forces are mutual, the two clamping plates 11 can apply the same downward force.

[0025] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fixture for a gear hobbing machine, comprising: The mounting base (1) is characterized in that an annular positioning structure is installed on the upper wall of the mounting base (1), three sets of side wall positioning structures are installed on the upper wall of the annular positioning structure, a linkage rod structure is installed on the upper wall of the mounting base (1), and two downward clamping structures are installed on the upper wall of the linkage rod structure; the annular positioning structure includes: two annular support plates (2), an annular positioning platform (3), several annular positioning screws (4), and several annular positioning balls (5); the two annular support plates (2) are respectively installed on the upper wall of the mounting base (1), the annular positioning platform (3) is installed on the upper wall of the two annular support plates (2), several threaded through holes are opened on the upper wall of the annular positioning platform (3), several annular positioning screws (4) are respectively installed in the threaded through holes of the annular positioning platform (3) through threaded movement, several annular positioning balls (5) are respectively installed on the upper wall of the annular positioning screws (4), and several open slots are opened on the upper wall of the annular positioning platform (3).

2. The fixture for a gear hobbing machine according to claim 1, characterized in that, The three sets of side wall positioning structures include: a side positioning support plate (6), a side positioning screw (7), and a side positioning ball (8); the side positioning support plate (6) is installed on the upper wall of the annular positioning platform (3), the side wall of the side positioning support plate (6) is provided with a threaded through hole, the side positioning screw (7) is installed in the threaded through hole of the side positioning support plate (6) by thread, and the side positioning ball (8) is installed on the inner wall of the side positioning screw (7).

3. The fixture for a gear hobbing machine according to claim 1, characterized in that, The linkage rod structure includes: a linkage semi-ring seat (9) and two pressing rods (10); the linkage semi-ring seat (9) is hinged and movably mounted on the upper wall of the mounting base (1); the two pressing rods (10) are hinged and movably mounted at both ends of the linkage semi-ring seat (9); the two pressing rods (10) pass through the open slot of the annular positioning platform (3); and the upper ends of the two pressing rods (10) are threaded.

4. The fixture for a gear hobbing machine according to claim 1, characterized in that, The two pressing clamping structures include: a clamping plate (11), an auxiliary support screw (12), an auxiliary support ball (13), and a pressing nut (14); the clamping plate (11) is movably fitted outside the pressing rod (10), the upper wall of the clamping plate (11) is provided with a threaded through hole, the auxiliary support screw (12) is movably installed in the threaded through hole of the clamping plate (11) by thread, the auxiliary support ball (13) is installed on the lower wall of the auxiliary support screw (12), and the pressing nut (14) is movably installed on the thread outside the pressing rod (10) by thread.

5. The fixture for a gear hobbing machine according to claim 4, characterized in that, The clamping plate (11) has a clamping pad (15) installed on its lower wall surface.

6. The fixture for a gear hobbing machine according to claim 1, characterized in that, The mounting base (1) has four mounting seats (16) mounted on its side wall.

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