A lathe fixture for coupling machining

Abstract

This invention relates to the field of coupling processing equipment technology, and provides a lathe fixture for clamping couplings. The fixture includes a fixture disc, with a hollow fixture cylinder extending outward from one side of the fixture disc. The fixture cylinder has circumferentially formed receiving grooves for accommodating jaws, which are rotatably connected within the receiving grooves and connected by torsion springs. A rotating disc is rotatably connected to the outer wall of the fixture cylinder. This invention overcomes the shortcomings of existing technologies, featuring a reasonable design and compact structure. The fixtures away from the coupling processing position automatically release their grip on the coupling, while the fixtures closer to the processing position automatically clamp the coupling within them. Coupling replacement can be completed without manual clamping and loosening of the fixtures or stopping the machine, improving coupling turning efficiency and increasing equipment automation. A single drive motor can control the rotation of both fixtures, significantly reducing production equipment costs.

Description

Technical Field

[0001] This invention relates to the field of coupling processing equipment technology, and specifically to a lathe fixture for coupling processing. Background Technology

[0002] A coupling is a mechanical component used to connect two rotating shafts and transmit torque. A lathe is a high-precision machining equipment that can meet the high-precision parameters of couplings, such as concentricity, parallelism, and end face runout. Through lathe machining, the connection accuracy between the two rotating shafts of the coupling can be ensured, guaranteeing the normal operation and transmission efficiency of the equipment.

[0003] Existing lathes for machining couplings typically use a three-jaw chuck to clamp and turn the coupling blank. The three-jaw chuck consists of a chuck body, movable jaws, and a jaw drive mechanism. Therefore, using a three-jaw chuck to clamp the coupling requires a certain amount of control time, and a new coupling blank can only be changed for turning after the coupling blank has been turned, which greatly reduces work efficiency. To address this, we propose a lathe fixture for machining couplings. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a lathe fixture for coupling processing, which overcomes the deficiencies of existing technologies, has a reasonable design and compact structure, and solves the problem of low efficiency in changing workpieces on existing lathes.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lathe fixture for machining couplings, used for clamping couplings, the fixture including a fixture disk, a hollow fixture cylinder extending outward from one side of the fixture disk, a receiving groove circumferentially provided on the fixture cylinder to accommodate jaws, the jaws being rotatably connected in the receiving groove and connected by a torsion spring, a rotating disk rotatably connected to the outer wall of the fixture cylinder, the rotating disk being circumferentially provided with a limiting block to push the jaws to deflect and press them against the outer wall of the coupling in the hollow cavity of the fixture cylinder.

[0008] Preferably, the gripper includes an inclined plate portion and a clamping portion, the distance between one side of the inclined plate portion and the clamping disc is less than the thickness of the limiting block, and the clamping portion has an arc-shaped structure on the side facing the cavity in the clamping cylinder.

[0009] Preferably, the device further includes the switching assembly for switching the position of the fixture. The switching assembly includes a positioning plate mounted on the lathe, a switching motor on the positioning plate, a swing arm at the output end of the switching motor, and two sets of fixture discs on the swing arm. The two sets of fixture discs are equidistant from the axis of the output end of the switching motor.

[0010] Preferably, the rotating disk is a gear structure, and the positioning plate is provided with an arc-shaped rack with the axis of the switching motor output end as the center point. The arc-shaped rack is provided with a first rack part and a second rack part on one side, and the first rack part and the second rack part are both located on the swing trajectory of the rotating disk with the axis of the switching motor output end as the center.

[0011] Preferably, the side of the clamping disc opposite to the clamping cylinder is connected to a driven gear via a rotating shaft, the positioning plate is provided with a drive motor, and the output end of the drive motor is connected to a drive gear for driving the driven gear.

[0012] Preferably, the positioning plate is provided with a support plate, and the support plate has an arc-shaped groove for the rotating shaft to slide in, the center of which is located on the axis of the switching motor output end.

[0013] Preferably, the axis of the output end of the switching motor is not parallel to the axis of the output end of the drive motor.

[0014] Preferably, one end of the limiting block has an arc-shaped structure, and the other end has a protrusion.

[0015] Preferably, the relative depth of the cavity in the clamp cylinder is greater than the relative depth of the receiving groove.

[0016] (III) Beneficial Effects

[0017] This invention provides a lathe fixture for machining couplings. It offers the following advantages:

[0018] The fixtures away from the coupling machining position automatically release their grip on the coupling, while the fixtures closer to the coupling machining position automatically clamp the coupling inside. The coupling can be replaced without manual control of the clamping and loosening of the fixtures and without stopping the machine. This not only improves the efficiency of coupling turning but also increases the automation level of the equipment.

[0019] Using a single drive motor to control the rotation of two fixtures separately greatly reduces the cost of production equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention with the coupling clamped in place;

[0021] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention without the coupling installed;

[0022] Figure 3 This is a three-dimensional schematic diagram of the back of the overall structure of the present invention;

[0023] Figure 4 This is a three-dimensional schematic diagram of the fixture structure of the present invention;

[0024] Figure 5 This is a three-dimensional schematic diagram of the gripper structure of the present invention;

[0025] Figure 6 This is a front-view perspective three-dimensional schematic diagram of the swing arm structure of the present invention.

[0026] In the diagram: 11. Fixture plate; 12. Fixture cylinder; 13. Receiving groove; 14. Gripper; 141. Inclined plate; 142. Clamping part; 15. Torsion spring; 16. Rotating disk; 17. Limit block; 2. Positioning plate; 3. Switching motor; 4. Swing arm; 5. Arc rack; 51. First rack part; 52. Second rack part; 6. Drive motor; 7. Drive gear; 8. Rotating shaft; 9. Driven gear; 10. Support plate. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] See attached document Figure 1-6 A lathe fixture for machining couplings is used to clamp couplings. The fixture includes a fixture disc 11, and a hollow fixture cylinder 12 extending outward from one side of the fixture disc 11. The fixture cylinder 12 has a circumferentially formed receiving groove 13 for accommodating jaws 14. The jaws 14 are rotatably connected in the receiving groove 13 and connected by a torsion spring 15. A rotating disc 16 is rotatably connected to the outer wall of the fixture cylinder 12. The rotating disc 16 has a circumferentially formed limiting block 17 to push the jaws 14 to deflect and align them with the coupling inside the hollow cavity of the fixture cylinder 12. The outer wall of the clamp is pressed, and the coupling is inserted into the hollow cavity of the clamp cylinder 12. Then, the rotating disk 16 is rotated so that the limiting block 17 is inserted between the jaw 14 and the rotating disk 16. At this time, the jaw 14 is deflected by the force to clamp the coupling, which has high clamping efficiency. The rotating disk 16 is rotated in the opposite direction. At this time, the limiting block 17 is disengaged from the jaw 14 and the rotating disk 16. At this time, the jaw 14 has a small clamping force on the coupling, which makes it easy to directly pull out the processed coupling, greatly improving the clamping efficiency.

[0029] In this embodiment, the gripper 14 includes an inclined plate portion 141 and a clamping portion 142. The distance between one side of the inclined plate portion 141 and the clamping disk 11 is less than the thickness of the limiting block 17. The clamping portion 142 has an arc-shaped structure on the side facing the hollow cavity of the clamping cylinder 12. When the limiting block 17 moves between the gripper 14 and the rotating disk 16, it will push the inclined plate portion 141, causing the clamping portion 142 to move towards the coupling, thereby increasing the clamping force. The arc-shaped structure on one side of the clamping portion 142 greatly increases the contact area between the clamping portion 142 and the outer wall of the coupling, further improving the clamping force.

[0030] In this embodiment, a switching component for switching fixture positions is also included. The switching component includes a positioning plate 2 mounted on a lathe. A switching motor 3 is provided on the positioning plate 2. A swing arm 4 is provided at the output end of the switching motor 3. Two sets of fixtures are provided on the swing arm 4. The distances from the two sets of fixtures to the axis of the output end of the switching motor 3 are the same. When the switching motor 3 is started, the swing arm 4 rotates. The reciprocating rotation of the swing arm 4 drives the position of the two sets of fixture disks 11 to change. One set of fixture disks 11 drives the coupling to rotate for cutting. A new coupling is installed on the other set of fixture disks 11. After the coupling is processed, the swing arm 4 drives the position of the two sets of fixture disks 11 to change, so that the fixture disk 11 with the new coupling is moved to the processing position. At this time, the new coupling can be cut and processed, and the processed coupling can be replaced. The coupling can be quickly replaced without stopping the machine, which greatly improves the work efficiency.

[0031] In this embodiment, the rotating disk 16 has a gear structure. The positioning plate 2 is provided with an arc-shaped rack 5 centered on the axis of the output end of the switching motor 3. A first rack portion 51 and a second rack portion 52 are provided on one side of the arc-shaped rack 5. The first rack portion 51 and the second rack portion 52 are both located on the swing trajectory of the rotating disk 16 centered on the axis of the output end of the switching motor 3. When the swing arm 4 drives the two sets of clamping disks 11 to change their positions, the rotating disks 16 on the two sets of clamping disks 11 will abut against the first rack portion 51 and the second rack portion 52 respectively, causing the two sets of rotating disks 16 to rotate. At this time, the two The limiting blocks 17 on each fixture rotate with the rotating disk 16, causing the limiting blocks 17 on the fixtures that are moving away from the coupling machining position to move away from the gap between the jaws 14 and the rotating disk 16, and the limiting blocks 17 on the fixtures that are moving towards the coupling machining position to insert between the jaws 14 and the rotating disk 16. At this time, the fixtures that are moving away from the coupling machining position automatically loosen their grip on the coupling, and the fixtures that are moving towards the coupling machining position automatically clamp the outer wall of the coupling. There is no need to manually operate the clamping and loosening of the fixtures, which not only improves the coupling turning efficiency, but also increases the automation level of the equipment.

[0032] In this embodiment, the side of the fixture disk 11 facing away from the fixture cylinder 12 is connected to a driven gear 9 via a rotating shaft 8. The positioning plate 2 is equipped with a drive motor 6, and the output end of the drive motor 6 is connected to a drive gear 7 for driving the driven gear 9. When the drive motor 6 is started, the drive gear 7 drives the driven gear 9 on the fixture at the coupling processing position to rotate, further causing the fixture to rotate as a whole. The rotation of two fixtures can be completely controlled by one drive, which greatly reduces the cost of production equipment.

[0033] In this embodiment, a support plate 10 is provided on the positioning plate 2. An arc-shaped groove for sliding of the rotating shaft 8 is provided in the support plate 10. The center of the arc-shaped groove is located on the axis of the output end of the switching motor 3. The rotating shafts 8 of the two clamps slide in the arc-shaped groove, which improves the stability of the position changes of the two clamps.

[0034] In this embodiment, the axis of the output end of the switching motor 3 is not aligned with the axis of the output end of the drive motor 6, so that when the positions of the two fixtures change, the fixtures not in the machining position of the coupling will not rotate. This facilitates the replacement of the coupling in the non-machining position while avoiding the simultaneous rotation of the two fixtures, which would increase energy consumption.

[0035] In this embodiment, one end of the limiting block 17 has an arc-shaped structure, which makes it easy for the limiting block 17 to be inserted between the gripper 14 and the rotating disk 16. The other end has a protrusion to prevent the limiting block 17 from moving too far and affecting the support effect.

[0036] In this embodiment, the relative depth of the hollow cavity in the clamping cylinder 12 is greater than the relative depth of the receiving groove 13. When the coupling is inserted into the hollow cavity of the clamping cylinder 12, its stability is better after being clamped by the jaws 14.

[0037] Working principle: Insert two unprocessed coupling blanks into the hollow cavity of the clamping cylinder 12 respectively, start the drive motor 6, at this time the drive gear 7 drives the driven gear 9 located at the coupling processing position to rotate, further causing the clamp located at the coupling processing position to drive the coupling blank to rotate to complete the turning work.

[0038] After the rough blank of the coupling is machined, the drive motor 6 stops working and the switching motor 3 starts. At this time, the swing arm 4 drives the two clamps to move, so that the clamp located at the machining position of the coupling moves away from that position. During this process, the rack part of the arc rack 5 will push the rotating disk 16 of the clamp to rotate, further causing the limit block 17 to leave the gap between the jaw 14 and the rotating disk 16. At this time, the machined coupling can be quickly removed and a new coupling blank can be replaced.

[0039] When the swing arm 4 moves the two clamps, the clamps that are initially far from the machining position of the coupling will move towards the machining position. During this process, the rack part of the arc rack 5 will push the rotating disk 16 of the clamp to rotate, which will further cause the limiting block 17 to be inserted between the jaw 14 and the rotating disk 16, so that the jaw 14 of the clamp will clamp the coupling blank. When the clamp moves to the machining position, the drive motor 6 is started, so that the clamp located at the machining position of the coupling will drive the coupling blank to rotate to complete the turning work.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lathe fixture for coupling machining, for clamping a coupling, characterized by: The clamp includes a clamping disk (11), and a hollow clamping cylinder (12) extends outward from one side of the clamping disk (11). The clamping cylinder (12) is circumferentially provided with a receiving groove (13) for accommodating a clamping claw (14). The clamping claw (14) is rotatably connected in the receiving groove (13) and connected by a torsion spring (15). A rotating disk (16) is rotatably connected to the outer wall of the clamping cylinder (12). A limiting block (17) is provided circumferentially on the rotating disk (16) to push the clamping claw (14) to deflect and press it against the outer wall of the coupling in the hollow cavity of the clamping cylinder (12). It also includes a switching component for switching the position of the fixture, the switching component includes a positioning plate (2) mounted on the lathe, a switching motor (3) is provided on the positioning plate (2), a swing arm (4) is provided at the output end of the switching motor (3), and two sets of fixture discs (11) are provided on the swing arm (4), the distance from the two sets of fixture discs (11) to the axis of the output end of the switching motor (3) is the same; The rotating disk (16) is a gear structure. The positioning plate (2) is provided with an arc-shaped rack (5) with the output shaft of the switching motor (3) as the center point. The arc-shaped rack (5) has a first rack part (51) and a second rack part (52) on one side. The first rack part (51) and the second rack part (52) are both located on the swing trajectory of the rotating disk (16) with the output shaft of the switching motor (3) as the center. The limiting block (17) has an arc-shaped structure at one end and a protrusion at the other end; When the swing arm (4) drives the two sets of clamping disks (11) to change position, the rotating disks (16) on the two sets of clamping disks (11) will abut against the first rack part (51) and the second rack part (52) respectively, causing the two sets of rotating disks (16) to rotate.

2. A lathe fixture for machining a coupling as claimed in claim 1, characterized in that: The gripper (14) includes an inclined plate portion (141) and a clamping portion (142). The distance between one side of the inclined plate portion (141) and the clamping disk (11) is less than the thickness of the limiting block (17). The clamping portion (142) has an arc-shaped structure on one side facing the cavity of the clamping cylinder (12).

3. A lathe fixture for machining a coupling as defined in claim 1, characterized in that: The side of the clamping disc (11) away from the clamping cylinder (12) is connected to a driven gear (9) via a rotating shaft (8). The positioning plate (2) is provided with a drive motor (6), and the output end of the drive motor (6) is connected to a drive gear (7) for driving the driven gear (9).

4. A lathe fixture for machining a coupling as defined in claim 3, characterized in that: The positioning plate (2) is provided with a support plate (10), and the support plate (10) has an arc-shaped groove for the rotating shaft (8) to slide. The center of the arc-shaped groove is located on the axis of the output end of the switching motor (3).

5. A lathe fixture for machining a coupling as defined in claim 3, characterized in that: The axis of the output end of the switching motor (3) is not the same as the axis of the output end of the drive motor (6).

6. A lathe fixture for machining a coupling as defined in claim 1, characterized in that: The relative depth of the cavity in the clamp cylinder (12) is greater than the relative depth of the receiving groove (13).

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