Eccentric shaft machining lathe with eccentric center structure

Abstract

The invention relates to the technical field of eccentric shaft machining lathes, in particular to an eccentric shaft machining lathe with an eccentric center structure, which comprises a lathe main body, a fixed frame is fixedly connected to one side of the lathe main body, a movable frame is arranged on the fixed frame in a sliding fit manner, and a rotating seat is rotatably connected to the movable frame; a transmission mechanism is rotationally connected to the rotating seat, a stabilizing ring frame is rotationally connected to the rotating seat, a follow-up rotating ring is rotationally connected to the stabilizing ring frame, an eccentric block center mechanism is fixedly connected to the follow-up rotating ring, and an eccentric shaft is clamped and fixed to a three-jaw chuck on the lathe body; the eccentric block center mechanism is arranged on the follow-up rotating ring, the two angle-adjustable center plates abut against the fan-shaped eccentric block on the eccentric shaft, when the eccentric shaft rotates for machining, the fan-shaped eccentric block on the eccentric shaft is more stably and accurately supported, vibration, unbalance and deformation are reduced, and the machining precision and quality are improved.

Description

Technical Field

[0001] This invention relates to the field of eccentric shaft machining lathes, and more particularly to an eccentric shaft machining lathe with an eccentric center structure. Background Technology

[0002] Lathes with eccentric center structures are primarily designed to stabilize and support eccentric shafts for precise machining. Due to the asymmetrical shape of eccentric shafts, traditional lathe centers may not provide sufficient stability, easily leading to vibration, misalignment, or inaccurate machining.

[0003] The prior art publication CN222198894U discloses a CNC lathe for machining eccentric shafts. An electric push rod drives a moving plate to move back and forth, thereby bringing the blank into the gripping range of the robotic arm via a receiving tray. The receiving tray containing the machined eccentric shaft is then removed from the gripping range, allowing the eccentric shaft to be collected. Simultaneously, a new receiving tray can be placed inside the moving plate, and blanks can be arranged on this tray. This enables continuous eccentric shaft machining without stopping the machine, thus improving work efficiency. The receiving tray is placed in a placement frame for easy retrieval and collection.

[0004] In existing technology, eccentric shafts are clamped and machined using a three-jaw chuck. However, because eccentric shafts often have fan-shaped eccentric blocks with uneven shape and mass distribution, the support for the eccentric shaft may be insufficient. Three-jaw chucks can generally only clamp the outer circumference of the shaft and cannot precisely support the position of the eccentric blocks. Due to the lack of dedicated support for the eccentric blocks, the eccentric shaft may experience uneven vibration during machining, affecting machining accuracy.

[0005] In summary, the existing technology lacks a technique for auxiliary support machining of eccentric shafts with fan-shaped eccentric blocks. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of the prior art by proposing an eccentric shaft machining lathe with an eccentric tip structure.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an eccentric shaft machining lathe with an eccentric center structure, comprising a lathe body, a fixed frame fixedly connected to one side of the lathe body, a movable frame slidably fitted on the fixed frame, a rotating seat rotatably connected to the movable frame, a transmission mechanism rotatably connected to the rotating seat, a stabilizing ring frame rotatably connected to the rotating seat, a following rotating ring rotatably connected to the stabilizing ring frame, an eccentric block center mechanism fixedly connected to the following rotating ring, and an eccentric shaft clamped and fixed by a three-jaw chuck on the lathe body.

[0008] Preferably, the fixed frame has a through groove, and a lead screw is rotatably connected to the inner wall of the groove. One end of the lead screw extends through the inner wall of the fixed frame to the outside and is fixedly connected to a first motor. The first motor is fixedly connected to the fixed frame. Corrugated pipes are fixedly connected to both ends of the fixed frame, and connecting sleeves are fixedly connected to the other ends of the corrugated pipes. The connecting sleeves are adapted to the outer wall of the movable frame. A limit rod is slidably fitted on one of the connecting sleeves, and a triangular block is fixedly connected to the other connecting sleeve. The triangular block is in slidable contact with the limit rod.

[0009] Preferably, a slider is fixedly connected to the bottom end of the movable frame, the outer side of the slider is slidably engaged with the inner wall of the groove, the middle part of the slider is threadedly connected to a lead screw, and a toothed disc is fixedly connected to the top end of the movable frame.

[0010] Preferably, a rotating column is fixedly connected to the bottom end of the rotating seat, and the bottom end of the rotating column is rotatably connected to the moving frame.

[0011] Preferably, a connecting block is fixedly connected to one end of the stabilizing ring frame, a rotating shaft is fixedly connected through the connecting block, both ends of the rotating shaft are rotatably connected to the rotating seat, a second motor is fixedly connected to one end of the rotating shaft, the second motor is fixedly connected to the rotating seat, a drive wheel is fixedly connected to the other end of the rotating shaft, and a limit ring groove is formed on the stabilizing ring frame.

[0012] Preferably, the transmission mechanism includes a universal joint, which is rotatably connected to a rotating seat. A transmission wheel is fixedly connected to one end of the universal joint, and the transmission wheel meshes with a driving wheel for transmission. A driven wheel is fixedly connected to the other end of the universal joint, and the driven wheel meshes with a gear plate for transmission.

[0013] Preferably, a plurality of fixing blocks are fixedly connected to the outer side of the following rotating ring, and rollers are rotatably connected to the fixing blocks, with the rollers slidingly engaged with the inner wall of the limiting ring groove.

[0014] Preferably, the eccentric block tip mechanism includes a first electric push rod, which is fixedly connected to the following rotating ring. An adjustment frame is fixedly connected to the output end of the first electric push rod, and a tip plate is rotatably connected to the bottom end of the adjustment frame in a symmetrical structure. The tip plate abuts against the eccentric block on the eccentric shaft.

[0015] Preferably, a second electric actuator is fixedly connected to the adjusting frame, and an adjusting plate is fixedly connected to the output end of the second electric actuator. Both ends of the adjusting plate are rotatably connected to connecting rods, and the other end of the connecting rods is rotatably connected to the top plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting an eccentric block tip mechanism on the following rotating ring, two adjustable tip plates abut against the fan-shaped eccentric block on the eccentric shaft. When the eccentric shaft rotates for machining, it can drive the eccentric block tip mechanism and the following rotating ring to rotate with it, so that the fan-shaped eccentric block on the eccentric shaft can be supported more stably and accurately, reducing vibration, imbalance and deformation, and improving machining accuracy and quality. At the same time, due to the synchronous rotation of the tip mechanism and the following rotating ring, the stability of the continuous machining process can be ensured, and the production efficiency and automation level can be improved. It significantly improves machining accuracy, reduces manual intervention, and can adapt to more complex workpieces. 2. By setting up a rotating seat and transmission mechanism, the ring frame can automatically rotate in the same direction as the lathe length while being stabilized and erected. This allows it to be retracted to one side of the lathe when the eccentric block center mechanism is not needed. This not only saves space and reduces equipment wear, but also improves production efficiency, processing stability, automation and safety. At the same time, it enhances the flexibility of the equipment, enabling it to quickly adapt to different processing tasks and improves the cleanliness of the working environment and ease of operation. 3. By setting multiple rollers on the following rotating ring, friction can be reduced, stability improved, load-bearing capacity enhanced, vibration and noise reduced, and the service life of the equipment extended when it rotates with the eccentric shaft. This makes the equipment more efficient, stable and reliable in operation. By setting a bellows on the outside of the fixed frame, the lead screw can be effectively protected from damage by external dirt, chips, moisture, corrosion and impacts, keeping the lead screw clean, extending its service life, and improving the accuracy and stability of the lathe machining process. Attached Figure Description

[0017] Figure 1 This is a side view of the overall structure of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 2 This is a schematic diagram of the other side of the overall structure of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention; Figure 3This is a partial sectional view of the fixed frame structure of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 4 This is a schematic diagram of the moving frame and other structures of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 5 This is a schematic diagram of the rotating seat and transmission mechanism of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 6 This is a partial cross-sectional schematic diagram of the stabilizing ring structure of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 7 This is a schematic diagram of the following rotating ring and other structures of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention. Figure 8 This is a schematic diagram of the eccentric block tip mechanism and other structures of an eccentric shaft machining lathe with an eccentric tip structure according to the present invention.

[0018] The following components are marked in the diagram: 1. Lathe body; 2. Fixed frame; 3. Moving frame; 4. Rotating seat; 5. Transmission mechanism; 6. Stabilizing ring frame; 7. Following rotating ring; 8. Eccentric block center mechanism; 9. Eccentric shaft; 201. Slide groove; 202. Lead screw; 203. First motor; 204. Bellows; 205. Connecting sleeve; 206. Limiting rod; 207. Triangular block; 301. Slider; 302. Gear plate; 401. Rotating column; 601. Connecting block; 602. Rotating shaft; 603. Second motor; 604. Driving wheel; 605. Limiting ring groove; 501. Universal joint; 502. Transmission wheel; 503. Driven wheel; 701. Fixing block; 702. Roller; 801. First electric push rod; 802. Adjusting frame; 803. Center plate; 804. Second electric push rod; 805. Adjusting plate; 806. Connecting rod. Detailed Implementation

[0019] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] like Figures 1-8 The eccentric shaft machining lathe shown includes a lathe body 1, a fixed frame 2 fixedly connected to one side of the lathe body 1, a sliding frame 3 slidably connected to the fixed frame 2, a rotating seat 4 rotatably connected to the moving frame 3, a transmission mechanism 5 rotatably connected to the rotating seat 4, a stabilizing ring frame 6 rotatably connected to the rotating seat 4, a following rotating ring 7 rotatably connected to the stabilizing ring frame 6, an eccentric block center mechanism 8 fixedly connected to the following rotating ring 7, and an eccentric shaft 9 clamped and fixed on the lathe body 1 by a three-jaw chuck.

[0021] like Figure 3 As shown, a sliding groove 201 is provided through the fixed frame 2. A lead screw 202 is rotatably connected to the inner wall of the sliding groove 201. One end of the lead screw 202 extends through the inner wall of the fixed frame 2 to the outside and is fixedly connected to a first motor 203. The first motor 203 is fixedly connected to the fixed frame 2. Corrugated pipes 204 are fixedly connected to both ends of the fixed frame 2. Connecting sleeves 205 are fixedly connected to the other end of the corrugated pipes 204. The connecting sleeves 205 are adapted to the outer wall of the movable frame 3. A limit rod 206 is slidably fitted on one connecting sleeve 205, and a triangular block 207 is fixedly connected to the other connecting sleeve 205. The triangular block 207 is in slidable contact with the limit rod 206. The first motor 203 drives the lead screw 202 to rotate, which causes the lead screw 202 to move the movable frame 3 connected to the slider 301. This causes the movable frame 3 to align the eccentric block tip mechanism 8 with the fan-shaped eccentric block on the eccentric shaft 9. By pushing the limit rod 206 upwards to prevent it from contacting the triangular block 207, the two connecting sleeves 205 can be separated, making it convenient to maintain the lead screw 202.

[0022] like Figure 4 As shown, a slider 301 is fixedly connected to the bottom of the movable frame 3. The outer side of the slider 301 is slidably engaged with the inner wall of the slide groove 201. The middle part of the slider 301 is threadedly connected to the lead screw 202. A toothed disc 302 is fixedly connected to the top of the movable frame 3.

[0023] like Figure 5 As shown, a rotating column 401 is fixedly connected to the bottom of the rotating seat 4, and the bottom of the rotating column 401 is rotatably connected to the movable frame 3.

[0024] like Figure 6 As shown, a connecting block 601 is fixedly connected to one end of the stabilizing ring frame 6. A rotating shaft 602 is fixedly connected through the connecting block 601. Both ends of the rotating shaft 602 are rotatably connected to the rotating seat 4. A second motor 603 is fixedly connected to one end of the rotating shaft 602, and the second motor 603 is fixedly connected to the rotating seat 4. A drive wheel 604 is fixedly connected to the other end of the rotating shaft 602. A limit groove 605 is formed on the stabilizing ring frame 6. The second motor 603 drives the connected rotating shaft 602 to rotate, so that the rotating shaft 602 can drive the stabilizing ring frame 6 connected to the connecting block 601 to rotate and stand upright.

[0025] like Figure 5As shown, the transmission mechanism 5 includes a universal joint 501, which is rotatably connected to the rotating seat 4. A drive wheel 502 is fixedly connected to one end of the universal joint 501, meshing with a driving wheel 604. A driven wheel 503 is fixedly connected to the other end of the universal joint 501, meshing with a geared disc 302. The rotating shaft 602 drives the connected driving wheel 604 to rotate, which in turn drives the drive wheel 502 to rotate. The drive wheel 502 then drives the universal joint 501 to rotate, which in turn drives the driven wheel 503 to rotate. The driven wheel 503 then meshes with the geared disc 302, thereby causing the rotating seat 4 to rotate 90 degrees.

[0026] like Figure 7 As shown, multiple fixing blocks 701 are fixedly connected to the outer side of the following rotating ring 7. Rollers 702 are rotatably connected to the fixing blocks 701, and the rollers 702 are slidably engaged with the inner wall of the limiting ring groove 605. When the lathe body 1 drives the eccentric shaft 9 to rotate for machining, the eccentric shaft 9 will drive the following rotating ring 7 connected to the eccentric block tip mechanism 8 to rotate. At this time, the rollers 702 on the following rotating ring 7 rotate within the limiting ring groove 605.

[0027] like Figure 8 As shown, the eccentric block center mechanism 8 includes a first electric actuator 801, which is fixedly connected to the following rotating ring 7. An adjusting frame 802 is fixedly connected to the output end of the first electric actuator 801. A center plate 803 is rotatably connected to the bottom end of the adjusting frame 802 in a symmetrical structure. The center plate 803 abuts against the eccentric block on the eccentric shaft 9. A rubber pad is provided on the side of the center plate 803 that contacts the eccentric block. The rubber pad effectively absorbs the impact and friction forces between the eccentric block and the center plate 803, reducing mechanical vibration and impact, and lowering noise during processing. This is especially important for precision machining and machinery requiring long-term operation, extending the machine's service life.

[0028] A second electric actuator 804 is fixedly connected to the adjusting frame 802. An adjusting plate 805 is fixedly connected to the output end of the second electric actuator 804. Both ends of the adjusting plate 805 are rotatably connected to connecting rods 806, and the other end of the connecting rods 806 is rotatably connected to the center plate 803. The second electric actuator 804 drives the connected adjusting plate 805 to move, so that the adjusting plate 805 can adjust the angle of the two center plates 803 through the connecting rods 806. Then, the first electric actuator 801 drives the adjusting frame 802 to move downward, so that the adjusting frame 802 can drive the two center plates 803 to abut against the fan-shaped eccentric block on the eccentric shaft 9.

[0029] By setting an eccentric block tip mechanism 8 on the following rotating ring 7, and having two adjustable-angle tip plates 803 abutting against the fan-shaped eccentric block on the eccentric shaft 9, the eccentric block tip mechanism 8 and the following rotating ring 7 can rotate with the eccentric shaft 9 during machining. This allows the fan-shaped eccentric block on the eccentric shaft 9 to receive more stable and precise support, reducing vibration, imbalance and deformation, and improving machining accuracy and quality. At the same time, the synchronous rotation of the eccentric block tip mechanism 8 and the following rotating ring 7 can ensure the stability of the continuous machining process, improve production efficiency and automation level, significantly improve machining accuracy, reduce manual intervention, and adapt to more complex workpieces.

[0030] Working principle: When it is necessary to process the eccentric shaft 9 with the fan-shaped eccentric block, first fix one end of the eccentric shaft 9 on the three-jaw chuck on the lathe body 1, and then use the first motor 203 to drive the lead screw 202 to rotate, so that the lead screw 202 drives the moving frame 3 connected to the slider 301 to move, so that the moving frame 3 drives the eccentric block tip mechanism 8 to align with the fan-shaped eccentric block on the eccentric shaft 9. Then, the second electric push rod 804 drives the connected adjusting plate 805 to move, so that the adjusting plate 805 can adjust the angle of the two top plates 803 through the connecting rod 806. Then, the first electric push rod 801 drives the adjusting frame 802 to move down, so that the adjusting frame 802 can drive the two top plates 803 to abut against the fan-shaped eccentric block on the eccentric shaft 9. Then, when the lathe body 1 drives the eccentric shaft 9 to rotate for machining, the eccentric shaft 9 will drive the following rotating ring 7 connected to the eccentric block tip mechanism 8 to rotate. At this time, the roller 702 on the following rotating ring 7 rotates in the limiting ring groove 605. After processing is completed, the eccentric shaft 9 is removed first, and then the second motor 603 is used to drive the connected rotating shaft 602 to rotate, so that the rotating shaft 602 can drive the stabilizing ring frame 6 connected to the connecting block 601 to rotate and stand upright. Simultaneously, the rotating shaft 602 drives the connected drive wheel 604 to rotate, which in turn drives the transmission wheel 502 to rotate. The transmission wheel 502 then drives the connected universal joint 501 to rotate, which in turn drives the driven wheel 503 to rotate. This allows the driven wheel 503 to mesh with the gear disc 302, thereby causing the rotating seat 4 to rotate 90 degrees, which in turn causes the stabilizing ring frame 6 to retract the transmission mechanism 5.

[0031] 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 process, method, article, or apparatus.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A lathe for machining eccentric shafts with an eccentric center structure, comprising a lathe body (1), characterized in that: A fixed frame (2) is fixedly connected to one side of the lathe body (1). A movable frame (3) is slidably connected to the fixed frame (2). A rotating seat (4) is rotatably connected to the movable frame (3). A transmission mechanism (5) is rotatably connected to the rotating seat (4). A stabilizing ring frame (6) is rotatably connected to the rotating seat (4). A following rotating ring (7) is rotatably connected to the stabilizing ring frame (6). An eccentric block center mechanism (8) is fixedly connected to the following rotating ring (7). An eccentric shaft (9) is clamped and fixed on the lathe body (1).

2. The eccentric shaft machining lathe with an eccentric center structure according to claim 1, characterized in that: A sliding groove (201) is provided through the fixed frame (2). A lead screw (202) is rotatably connected to the inner wall of the sliding groove (201). One end of the lead screw (202) extends through the inner wall of the fixed frame (2) to the outside and is fixedly connected to a first motor (203). The first motor (203) is fixedly connected to the fixed frame (2). Corrugated pipes (204) are fixedly connected to both ends of the fixed frame (2). A connecting sleeve (205) is fixedly connected to the other end of the corrugated pipe (204). The connecting sleeve (205) is adapted to the outer wall of the movable frame (3). A limit rod (206) is slidably fitted on one of the connecting sleeves (205), and a triangular block (207) is fixedly connected to the other connecting sleeve (205). The triangular block (207) is slidably contacted with the limit rod (206).

3. The eccentric shaft machining lathe with an eccentric center structure according to claim 2, characterized in that: The bottom end of the movable frame (3) is fixedly connected to a slider (301), the outer side of the slider (301) is slidably engaged with the inner wall of the slide groove (201), the middle part of the slider (301) is threadedly connected to the lead screw (202), and the top end of the movable frame (3) is fixedly connected to a toothed disc (302).

4. The eccentric shaft machining lathe with an eccentric center structure according to claim 1, characterized in that: The bottom end of the rotating seat (4) is fixedly connected to a rotating column (401), and the bottom end of the rotating column (401) is rotatably connected to the moving frame (3).

5. A lathe for machining eccentric shafts with an eccentric center structure according to claim 1, characterized in that: A connecting block (601) is fixedly connected to one end of the stabilizing ring frame (6), and a rotating shaft (602) is fixedly connected through the connecting block (601). Both ends of the rotating shaft (602) are rotatably connected through the rotating seat (4). A second motor (603) is fixedly connected to one end of the rotating shaft (602), and the second motor (603) is fixedly connected to the rotating seat (4). A drive wheel (604) is fixedly connected to the other end of the rotating shaft (602). A limit ring groove (605) is provided on the stabilizing ring frame (6).

6. A lathe for machining eccentric shafts with an eccentric center structure according to claim 5, characterized in that: The transmission mechanism (5) includes a universal joint (501), which is rotatably connected to the rotating seat (4). A transmission wheel (502) is fixedly connected to one end of the universal joint (501), and the transmission wheel (502) meshes with the driving wheel (604) for transmission. A driven wheel (503) is fixedly connected to the other end of the universal joint (501), and the driven wheel (503) meshes with the gear plate (302) for transmission.

7. A lathe for machining eccentric shafts with an eccentric center structure according to claim 6, characterized in that: Multiple fixing blocks (701) are fixedly connected to the outer side of the following rotating ring (7), and rollers (702) are rotatably connected to the fixing blocks (701). The rollers (702) are slidably engaged with the inner wall of the limiting ring groove (605).

8. A lathe for machining eccentric shafts with an eccentric center structure according to claim 1, characterized in that: The eccentric block tip mechanism (8) includes a first electric push rod (801), which is fixedly connected to the following rotating ring (7). An adjustment frame (802) is fixedly connected to the output end of the first electric push rod (801). A tip plate (803) is rotatably connected to the bottom end of the adjustment frame (802) in a symmetrical structure. The tip plate (803) abuts against the eccentric block on the eccentric shaft (9).

9. A lathe for machining eccentric shafts with an eccentric center structure according to claim 8, characterized in that: A second electric actuator (804) is fixedly connected to the adjustment frame (802). An adjustment plate (805) is fixedly connected to the output end of the second electric actuator (804). A connecting rod (806) is rotatably connected to both ends of the adjustment plate (805). The other end of the connecting rod (806) is rotatably connected to the top plate (803).

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