A shaft tipper mechanism

Abstract

This utility model relates to the field of lathe technology, specifically to a shaft ejector mechanism, comprising: a secondary spindle chuck with a stepped groove in the middle; retaining ring 1 and retaining ring 2 respectively fitted on the outer sides of both ends of an ejector rod; a thrust spring fitted on the outer side of the middle of the ejector rod; and a top plate for ejecting the workpiece installed at one end of the ejector rod; an anti-rotation protrusion slidably connected to an anti-rotation groove is fixed on the inner wall of retaining ring 1, and an external thread is provided on the outer wall of retaining ring 1; the beneficial effect is that by providing an internal thread on the inner wall of the hollow cylinder, and the retaining ring 1 fitted on the outer side of the ejector rod, with the retaining ring 1 and the internal thread cooperating with each other, the operator only needs to rotate the ejector rod to adjust the position of retaining ring 1 in the inner cavity of the hollow cylinder, thereby adjusting the degree of compression of the thrust spring on the outer side of the ejector rod. This device achieves passive ejection of the workpiece by means of the thrust spring, and the ejection force can be arbitrarily adjusted by rotating the ejector rod, making it more widely applicable.

Description

Technical Field

[0001] This utility model relates to the field of lathe technology, specifically to a shaft ejector mechanism. Background Technology

[0002] The subspindle of a lathe is an auxiliary spindle on a CNC lathe. It is usually installed on the opposite side of the main spindle and is used to realize bidirectional machining or automatic transfer of workpieces. After the main spindle completes machining at one end, the subspindle can clamp the other end of the workpiece, realizing double-sided machining in one clamping and reducing repeated positioning errors.

[0003] In the prior art, Chinese utility model with publication number CN201931090U discloses a lathe ejector device, which adopts a pneumatic structure. With the help of the piston in the cylinder, the ejector rod ejects the machined workpiece. Combined with a pneumatic workpiece clamping device, it realizes the rapid operation of workpiece loading and unloading.

[0004] However, the thrust of traditional ejector mechanisms is usually constant, making it difficult to adjust the thrust for different workpieces, resulting in some workpieces failing to be ejected smoothly. Therefore, this invention proposes a shaft ejector mechanism to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a shaft-mounted feeding mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a shaft-mounted feeding mechanism, comprising:

[0007] A secondary spindle chuck, wherein a stepped groove is provided in the middle of the secondary spindle chuck, and a hollow cylinder is movably inserted into the inner cavity of the stepped groove;

[0008] A push rod is movably inserted into the inner cavity of the hollow cylinder. A retaining ring 1 and a retaining ring 2 are respectively sleeved on the outer sides of both ends of the push rod. A thrust spring is sleeved on the outer side of the middle part of the push rod. A fixing ring is fixedly sleeved on the outer side of one end of the push rod, and the fixing ring is located between retaining ring 1 and retaining ring 2. The thrust spring is located between the fixing ring and retaining ring 1. A top plate for pushing the workpiece is installed on one end of the push rod.

[0009] The other end of the top rod is provided with an anti-rotation groove. The inner wall of the first retaining ring is fixed with an anti-rotation protrusion that is slidably connected to the anti-rotation groove. The outer wall of the first retaining ring is provided with an external thread. The inner wall of the hollow cylinder is provided with an internal thread, and the external thread is compatible with the internal thread.

[0010] Preferably, one end of the top rod is provided with a threaded slot, and a stud is fixed on one side of the top plate, with the stud inserted into the threaded slot.

[0011] Preferably, a limiting baffle is fixedly provided on the outer side of one end of the hollow cylinder, and the limiting baffle is located in the inner cavity of the stepped groove. A clamping ring is provided at the open end of the stepped groove, and the clamping ring presses against the surface of the limiting baffle.

[0012] Preferably, the second retaining ring is located in the inner cavity of the open end of the hollow cylinder, a locking block is fixed on the outer side of the second retaining ring, and a locking groove adapted to the locking block is opened on the surface of the limiting baffle.

[0013] Preferably, a spring groove for placing a thrust spring is provided on one side of the retaining ring, and a limiting retaining ring is fixed on the inner wall of the hollow cylinder. The limiting retaining ring is located at one end of the internal thread, and one end of the push rod moves through the limiting retaining ring.

[0014] Preferably, multiple anti-rotation grooves and anti-rotation protrusions are provided and distributed in a ring array around the circumference of the top rod, and the length of the anti-rotation groove is greater than the length of the internal thread.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention features an internal thread on the inner wall of a hollow cylinder, a retaining ring fitted on the outer side of the push rod, and a groove for preventing rotation. An anti-rotation protrusion, matching the groove, is fixed to the inner wall of the retaining ring. Therefore, the retaining ring can slide along the length of the push rod without rotating relative to it. Operators can adjust the position of the retaining ring within the hollow cylinder by rotating the push rod, thereby adjusting the compression of the thrust spring on the outer side of the push rod. This device uses the thrust spring to passively eject the workpiece, and the ejection force can be adjusted arbitrarily by rotating the push rod, making it applicable to a wider range of applications. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0019] Figure 3 This is an exploded view of the overall structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the hollow cylinder of this utility model;

[0021] Figure 5 This is a three-dimensional schematic diagram of the retaining ring structure of this utility model.

[0022] In the diagram: 1. Sub-spindle chuck; 11. Stepped groove; 12. Clamping ring; 2. Hollow cylinder; 21. Limiting baffle; 22. Internal thread; 23. Limiting retaining ring; 24. Slot; 3. Push rod; 31. Fixing ring; 32. Thrust spring; 33. Anti-rotation groove; 4. Retaining ring one; 41. External thread; 42. Spring groove; 43. Anti-rotation protrusion; 5. Retaining ring two; 51. Clamping block; 6. Top plate; 61. Stud. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0024] Please see Figures 1 to 5 This utility model provides a technical solution:

[0025] Example 1: A shaft-mounted feeding mechanism, comprising: a secondary spindle chuck 1.

[0026] Specifically, a stepped groove 11 is provided in the middle of the secondary spindle chuck 1. A hollow cylinder 2 is movably inserted into the inner cavity of the stepped groove 11. The cross-section at the center of the stepped groove 11 is a circle that matches the hollow cylinder 2. The cross-section at the opening end of the stepped groove 11 is triangular and has a chamfer at the corner.

[0027] Secondly, a push rod 3 is movably inserted into the inner cavity of the hollow cylinder 2. A retaining ring 4 and a retaining ring 5 are respectively fitted onto the outer sides of both ends of the push rod 3. A thrust spring 32 is fitted onto the outer side of the middle part of the push rod 3. The thrust spring 32 is always in a compressed state. A fixing ring 31 is fixedly fitted onto the outer side of one end of the push rod 3, and the fixing ring 31 is located between the retaining ring 4 and the retaining ring 5. The thrust spring 32 is located between the fixing ring 31 and the retaining ring 4. Figure 2 and Figure 4 As shown, the thrust spring 32 provides thrust that constantly pushes the fixed ring 31 away from the retaining ring 4, while the retaining ring 5 is used to limit the sliding stroke of the fixed ring 31 and the push rod 3. A top plate 6 for pushing the workpiece is installed at one end of the push rod 3. The workpiece is inserted into the inner cavity of the stepped groove 11 from one side of the sub-spindle chuck 1. The jaws on the sub-spindle chuck 1 clamp and position the workpiece. One end of the workpiece presses against the top plate 6 and pushes the push rod 3 deeper into the inner cavity of the hollow cylinder 2. At this time, the thrust spring 32 is compressed more. When the workpiece is finished, the jaws on the sub-spindle chuck 1 release the workpiece. At this time, the thrust spring 32 can push the push rod 3 out of the inner cavity of the hollow cylinder 2, and the top plate 6 can push the workpiece out, realizing automatic ejection.

[0028] Furthermore, an anti-rotation groove 33 is provided on the other end surface of the push rod 3. An anti-rotation protrusion 43 is fixed on the inner wall of the retaining ring 4 and is slidably connected to the anti-rotation groove 33. An external thread 41 is provided on the outer wall of the retaining ring 4, and an internal thread 22 is provided on the inner wall of the hollow cylinder 2. The external thread 41 and the internal thread 22 are matched. The anti-rotation protrusion 43 and the anti-rotation groove 33 cooperate with each other, so that the push rod 3 and the retaining ring 4 can only slide relative to each other and will not rotate relative to each other. Therefore, the operator can rotate the retaining ring 4 by turning the push rod 3 with a tool. At this time, the internal thread 22 can push the retaining ring 4 to move in the inner cavity of the hollow cylinder 2, thereby changing the position of the retaining ring 4, thereby adjusting the degree of compression of the thrust spring 32, and thus adjusting the thrust of the top plate 6 on the workpiece.

[0029] To facilitate the disassembly and replacement of the top plate 6, this application also features a threaded slot at one end of the push rod 3, a stud 61 fixed on one side of the top plate 6 and inserted into the threaded slot, the diameter of the top plate 6 being larger than the diameter of the push rod 3, the top plate 6 being able to fully contact the surface of the workpiece, and the top plate 6 being able to be separated from the push rod 3 by rotating the top plate 6 separately, so as to facilitate the installation and disassembly of the top plate 6, while the retaining ring 5 can be smoothly fitted onto the outside of the push rod 3 or removed from the outside of the push rod 3.

[0030] To prevent the hollow cylinder 2 from rotating, this application further includes a limiting baffle 21 fixedly installed on the outer side of one end of the hollow cylinder 2, with the limiting baffle 21 located within the inner cavity of the stepped groove 11. A clamping ring 12 is provided at the open end of the stepped groove 11, and the clamping ring 12 presses against the surface of the limiting baffle 21. The limiting baffle 21 is engaged within the inner cavity of the stepped groove 11. Combined with the clamping ring 12 pressing the limiting baffle 21, the hollow cylinder 2 can be positioned. Figure 3 As shown, the clamping ring 12 is fixedly connected to the secondary spindle chuck 1 by bolts. The outer edge of the clamping ring 12 is a triangular structure that matches the stepped groove 11, and the corners are also chamfered. The limiting baffle 21 is a hexagonal structure, and three of its sides are respectively attached to the three inner sidewalls of the stepped groove 11. The size of the limiting baffle 21 is smaller than that of the clamping ring 12. The bolts on the clamping ring 12 will not interfere with the limiting baffle 21, and the limiting baffle 21 and the hollow cylinder 2 will not rotate on their own.

[0031] To position the retaining ring 2 5, the retaining ring 2 5 of this application is located in the inner cavity of the open end of the hollow cylinder 2. A locking block 51 is fixed to the outer side of the retaining ring 2 5, and a locking groove 24 adapted to the locking block 51 is opened on the surface of the limiting baffle 21. Figure 4 As shown, after the locking block 51 is inserted into the inner cavity of the locking slot 24, the retaining ring 5 and the hollow cylinder 2 can no longer rotate relative to each other. Combined with... Figure 3As shown, the clamping ring 12 can clamp the retaining ring 5 while clamping the limiting baffle 21, thereby achieving the positioning of the retaining ring 5.

[0032] To prevent the retaining ring 4 from separating from the push rod 3, this application also has a spring groove 42 provided on one side of the retaining ring 4 for placing the thrust spring 32. A limiting retaining ring 23 is fixed on the inner wall of the hollow cylinder 2. The limiting retaining ring 23 is located at one end of the internal thread 22, and one end of the push rod 3 moves through the limiting retaining ring 23. The limiting retaining ring 23 is used to limit the sliding of the retaining ring 4 and prevent the retaining ring 4 from separating from the push rod 3.

[0033] To prevent the push rod 3 from being unable to slide, the anti-rotation groove 33 and the anti-rotation protrusion 43 of this application are provided in multiple and arranged in a ring array around the circumference of the push rod 3. The length of the anti-rotation groove 33 is greater than the length of the internal thread 22. Therefore, when the retaining ring 4 and the internal thread 22 are engaged, the push rod 3 can always slide a certain distance, thereby preventing the anti-rotation protrusion 43 from corresponding with the end of the anti-rotation groove 33, which would prevent the push rod 3 and the retaining ring 4 from being unable to slide relative to each other.

[0034] 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 shaft-mounted feeding mechanism, characterized in that: include: A secondary spindle chuck (1) has a stepped groove (11) in the middle, and a hollow cylinder (2) is movably inserted into the inner cavity of the stepped groove (11). The hollow cylinder (2) is movably connected to a push rod (3). The two ends of the push rod (3) are respectively fitted with a retaining ring one (4) and a retaining ring two (5). The middle part of the push rod (3) is fitted with a thrust spring (32). One end of the push rod (3) is fixedly fitted with a fixing ring (31), and the fixing ring (31) is located between the retaining ring one (4) and the retaining ring two (5). The thrust spring (32) is located between the fixing ring (31) and the retaining ring one (4). One end of the push rod (3) is equipped with a top plate (6) for pushing the workpiece. The other end of the top rod (3) is provided with an anti-rotation groove (33). The inner wall of the first retaining ring (4) is fixed with an anti-rotation protrusion (43) that is slidably connected to the anti-rotation groove (33). The outer wall of the first retaining ring (4) is provided with an external thread (41). The inner wall of the hollow cylinder (2) is provided with an internal thread (22), and the external thread (41) is compatible with the internal thread (22).

2. The shaft ejector mechanism according to claim 1, characterized in that: One end of the top rod (3) is provided with a threaded slot, and a stud (61) is fixed on one side of the top plate (6), and the stud (61) is inserted into the threaded slot.

3. The shaft ejector mechanism according to claim 2, characterized in that: A limiting baffle (21) is fixedly provided on the outer side of one end of the hollow cylinder (2), and the limiting baffle (21) is located in the inner cavity of the stepped groove (11). A pressing ring (12) is provided at the open end of the stepped groove (11), and the pressing ring (12) presses on the surface of the limiting baffle (21).

4. The shaft ejector mechanism according to claim 3, characterized in that: The second retaining ring (5) is located in the inner cavity of the open end of the hollow cylinder (2). A locking block (51) is fixed on the outer side of the second retaining ring (5). A slot (24) adapted to the locking block (51) is opened on the surface of the limiting baffle (21).

5. A shaft ejector mechanism according to claim 4, characterized in that: The retaining ring (4) has a spring groove (42) for placing the thrust spring (32) on one side. The inner wall of the hollow cylinder (2) is fixed with a limiting retaining ring (23). The limiting retaining ring (23) is located at one end of the internal thread (22), and one end of the push rod (3) moves through the limiting retaining ring (23).

6. The shaft ejector mechanism according to claim 5, characterized in that: The anti-rotation groove (33) and anti-rotation protrusion (43) are provided in multiple ways and are arranged in a ring array around the circumference of the top rod (3). The length of the anti-rotation groove (33) is greater than the length of the internal thread (22).

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