High-precision milling device for triangular rotor of rotor engine

Abstract

The invention relates to the technical field of triangular rotor machining, in particular to a high-precision milling device for a triangular rotor of a rotor engine, which comprises a mounting seat, a first driving assembly and a second driving assembly are arranged on the mounting seat, and a clamping disc is fixedly mounted at the output end of the first driving assembly. An eccentric shaft is fixedly installed on the clamping disc, a triangular rotor forming part is jointly placed on the eccentric shaft and the clamping disc, a fixing base is fixedly installed on the eccentric shaft, a fixing groove is formed in the fixing base in a penetrating mode, a fixing rod is slidably connected into the fixing groove, and the triangular rotor forming part is fixed through meshing pre-fixing of inner teeth of the eccentric shaft and three-point cooperative limiting. Displacement, deflection and axial movement are prevented, the epicycloid profile consistency is improved, and the molded line error is superior to that of a traditional mode; accurate switching of rotor postures is achieved by relying on the revolution ratio of 2: 3, repeated clamping errors are avoided, and standard unification is guaranteed; and due to the step-by-step milling design, cutting force is concentrated, tracks are attached, and thin-wall deformation is effectively eliminated.

Description

Technical Field

[0001] This invention relates to the field of triangular rotor machining technology, specifically to a high-precision milling machining device for triangular rotors of rotor engines. Background Technology

[0002] As a core precision component of the Wankel rotary engine, the triangular rotor has a long epicycloid profile, which needs to achieve strict conjugate meshing with the cycloid profile inside the cylinder. This places extremely high demands on machining accuracy (profile error, form and position tolerance), surface quality, and structural stability.

[0003] Traditional clamping methods often employ external cylindrical clamping or simple end-face positioning, which are insufficient to effectively restrict the six degrees of freedom of the part. During milling, axial movement, wobble, and other deviations are prone to occur, resulting in poor profile machining consistency and excessive profile errors. Furthermore, the clamping force is concentrated on the thin-walled outer edge, which can easily cause part deformation and damage to the outer arc surface. These defects are even more pronounced when machining easily deformable materials such as aluminum alloys. Moreover, when the three outer arc surfaces and end faces of the triangular rotor need to be machined in stages, traditional processes require manual disassembly, adjustment of posture, and re-clamping. This operation is cumbersome and inefficient. Repeated clamping can also introduce positioning errors, leading to inconsistent datum values ​​for each machined surface and failure to meet form and position tolerances. This affects the engine's sealing performance and power output stability. Therefore, it is necessary to propose a high-precision milling machining device for the triangular rotor of a rotor engine. Summary of the Invention

[0004] To address the problems in the prior art, this invention provides a high-precision milling device for the triangular rotor of a rotary engine.

[0005] The technical solution adopted by this invention to solve its technical problem is: a high-precision milling processing device for a triangular rotor of a rotary engine, including a mounting base, on which a first driving component and a second driving component are provided. A clamping plate is fixedly installed at the output end of the first driving component. An eccentric shaft is fixedly installed on the clamping plate. A triangular rotor forming part is placed on the eccentric shaft and the clamping plate. A fixed seat is fixedly installed on the eccentric shaft. A fixed groove is formed through the fixed seat. A fixed rod is slidably connected in the fixed groove. An elastic component is provided in both the fixed rod and the fixed groove. A locking component is provided on the fixed seat. A support base is fixedly installed on the mounting base. A movable groove is formed on the support base. A threaded rod is rotatably connected in the movable groove through a bearing. One end of the threaded rod is fixedly connected to the second driving component. A threaded sleeve is threadedly connected to the threaded rod. A movable block is fixedly sleeved on the outer wall of the threaded sleeve. One end of the movable block extends through the support base and is fixedly connected to a clamping block.

[0006] Specifically, the first drive assembly includes a first mounting slot, which is formed on the outer side wall of the mounting base. A geared motor is fixedly installed in the first mounting slot, and a drive rod is fixedly installed at the output end of the geared motor through a coupling. The drive rod is fixedly connected to the clamping plate.

[0007] Specifically, the second drive assembly includes a second mounting slot, which is formed on the outer wall of the mounting base. A drive motor is fixedly installed in the second mounting slot, and the output end of the second drive motor is fixedly connected to a threaded rod through a coupling.

[0008] Specifically, the elastic component includes a limiting groove, which is formed at one end of the fixed rod located in the fixed groove. The limiting rod is fixedly connected in the fixed groove, and one end of the limiting rod extends into the limiting groove. A spring is sleeved on the limiting rod, and the two ends of the spring abut against the walls of the fixed groove and the limiting groove, respectively.

[0009] Specifically, the locking assembly includes a threaded hole that penetrates the wall of the fixing groove, and a locking bolt is threaded into the threaded hole.

[0010] Specifically, one end of the locking bolt extends outside the fixing seat, and the other end of the locking bolt extends into the fixing groove and abuts against the fixing rod.

[0011] Specifically, the fixing rod and the two clamping blocks are arranged in a Y-shaped triangular array, and the two clamping blocks and the eccentric shaft are arranged in a triangular array.

[0012] Specifically, the rotation ratio between the triangular rotor forming part and the eccentric shaft is 2:3.

[0013] The beneficial effects of this invention are as follows: The high-precision milling device for the triangular rotor of the rotor engine described in this invention achieves angle pre-fixation through the meshing of the eccentric shaft with the internal teeth of the triangular rotor forming part. Combined with the clamping blocks on both sides and the bottom fixing rod, it forms a three-point coordinated limiting, which avoids swaying and wobble during milling. Furthermore, the even distribution of force on the outer triangle prevents axial movement, significantly improving the consistency of the long epicycloid profile machining. The profile error control accuracy is superior to traditional clamping methods. Furthermore, relying on the fixed 2:3 revolution ratio between the rotor and the eccentric shaft, the geared motor drives the eccentric shaft to precisely switch the rotor machining end face without manual posture adjustment, avoiding repeated clamping and positioning errors, ensuring the uniformity of the machining datum for the three outer arc surfaces and end faces, and meeting the form and position tolerance requirements for high-precision assembly. The step-by-step milling design of "single clamping → machining one surface → precise switching → machining the next surface" makes the cutting force more concentrated and the trajectory more closely aligned, effectively eliminating cutting deformation of thin-walled parts. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 A schematic diagram of the machining state of the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention; Figure 2 A schematic diagram of the adjustment process state of the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention; Figure 3 A schematic diagram of the standby state of the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention; Figure 4 A schematic diagram of the mounting base for the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention; Figure 5 A schematic diagram of the support base for the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention; Figure 6 An internal sectional view of the mounting base of the high-precision milling device for the triangular rotor of a rotary engine provided by the present invention.

[0016] In the diagram: 1. Mounting base; 2. Clamping plate; 3. Eccentric shaft; 4. Triangular rotor forming part; 5. Fixed base; 6. Fixed groove; 7. Fixed rod; 8. Support base; 9. Moving groove; 10. Threaded rod; 11. Threaded sleeve; 12. Moving block; 13. Clamping block; 14. First mounting groove; 15. Gear motor; 16. Drive rod; 17. Second mounting groove; 18. Drive motor; 19. Limiting groove; 20. Limiting rod; 21. Spring; 22. Threaded hole; 23. Locking bolt. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0018] like Figures 1-6 As shown, the present invention provides the following technical solution: Example 1: A high-precision milling device for a triangular rotor of a rotary engine, comprising a mounting base 1, on which a first drive assembly and a second drive assembly are mounted. A clamping plate 2 is fixedly mounted at the output end of the first drive assembly. An eccentric shaft 3 is fixedly mounted on the clamping plate 2. A triangular rotor forming part 4 is placed on both the eccentric shaft 3 and the clamping plate 2. A fixing seat 5 is fixedly mounted on the eccentric shaft 3. A fixing groove 6 is formed through the fixing seat 5. A fixing rod 7 is slidably connected within the fixing groove 6. The fixing rod 7 is connected to the fixing seat 5. An elastic component is provided in the fixed groove 6. A locking component is provided on the fixed seat 5. A support seat 8 is fixedly installed on the mounting seat 1. A movable groove 9 is provided on the support seat 8. A threaded rod 10 is rotatably connected to the movable groove 9 through a bearing. One end of the threaded rod 10 is fixedly connected to the second drive component. A threaded sleeve 11 is threadedly connected to the threaded rod 10. A movable block 12 is fixedly sleeved on the outer wall of the threaded sleeve 11. One end of the movable block 12 extends through to the outside of the support seat 8 and is fixedly connected to a clamping block 13. When using it, the following steps are included: First, the triangular rotor forming part 4 is first placed on the eccentric shaft 3 until one side of the triangular rotor forming part 4 abuts against the clamping plate 2. Then, one corner of the triangular rotor forming part 4 is set upward. Then, the inner teeth of the triangular rotor forming part 4 are engaged with the outer teeth of the eccentric shaft 3 to fix the placement angle of the triangular rotor forming part 4. The second step is to start the drive motor 18. The drive motor 18 drives the threaded rod 10 to rotate, while the threaded sleeve 11 cannot rotate due to the limitation of the moving block 12 and the moving groove 9. As the threaded rod 10 rotates, it will drive the threaded sleeve 11 to rotate. The threaded rod 11 drives the moving block 12 to move in the moving groove 9. The moving block 12 will drive the clamping block 13 to move synchronously. The moving block 13 abuts against the outer side walls of the two sides of the triangular rotor forming part 4, thereby cooperating with the eccentric shaft 3 to provide support in the middle. The clamping blocks 13 on both sides press down to clamp, thereby clamping the triangular rotor forming part 4 in a triangular array. Third step: Rotate the locking bolt 23. The locking bolt 23 moves in the threaded hole 22 and disengages from the fixing rod 7, thereby releasing the fixing of the fixing rod 7. At this time, the spring 21, supported by the moving groove 6, pushes the fixing rod 7 to move outward, so that the fixing rod 7 abuts against the lower outer wall of the triangular rotor forming part 4. Then rotate the locking bolt 23 again. The locking bolt 23 moves in the threaded hole 22, so that the locking bolt 23 abuts against the fixing rod 7 and clamps and fixes the fixing rod 7. The fixing rod 7 and the two clamping blocks 13 are Y-shaped on the outside, which, together with the clamping plate 2, limits the position of the triangular rotor forming part 4. Fourth step: At this time, the milling cutter can be started to perform fine machining on the lower end plane of the triangular rotor forming part 4. After the machining is completed, the drive motor 18 is started. The drive motor 18 drives the clamping block 13 to move and releases the clamping and fixing of the triangular rotor forming part 4. Step 5: Start the geared motor 15, which will drive the eccentric shaft 3 to rotate one revolution. According to the revolution ratio between the eccentric shaft 3 and the triangular rotor forming part 4, the triangular rotor forming part 4 will rotate two-thirds of a revolution, thereby replacing the downward end face of the triangular rotor forming part 4. Then start the drive motor 18, which will drive the clamping block 13 to clamp and fix the triangular rotor forming part 4. Step 6: The lower end face of the triangular rotor forming part 4 is processed again through step 4, and then the last end face is processed again through step 5, so that the installation of the triangular rotor forming part 4 is stable, and the three outer arc surfaces of the triangular rotor forming part 4 are milled and finished more specifically, so that the machining accuracy of the triangular rotor is higher.

[0019] Example 2: The technical solutions in this example that differ from Example 1 include: The first drive assembly includes a first mounting groove 14, which is formed on the outer side wall of the mounting base 1. A geared motor 15 is fixedly installed in the first mounting groove 14. A drive rod 16 is fixedly installed on the output end of the geared motor 15 via a coupling. The drive rod 16 is fixedly connected to the clamping plate 2. When the geared motor 15 is started, it drives the drive rod 16 to rotate, which in turn drives the clamping plate 2 and the eccentric shaft 3 to rotate. The second drive assembly includes a second mounting groove 17, which is formed on the outer side wall of the mounting base 1. A drive motor 18 is fixedly installed in the mounting slot 17. The output end of the second drive motor 18 is fixedly connected to the threaded rod 10 via a coupling. When the drive motor 18 is started, it drives the threaded rod 10 to rotate, and the threaded rod 10 drives the moving block 12 to move. The elastic component includes a limiting groove 19, which is formed at one end of the fixed rod 7 located in the fixed groove 6. A limiting rod 20 is fixedly connected in the fixed groove 6, and one end of the limiting rod 20 extends into the limiting groove 19. A spring 21 is sleeved on the limiting rod 20, and the two ends of the spring 21 are respectively connected to the fixed groove 6 and the limiting rod 20. The spring 21, supported by the fixed groove 6, pushes the fixed rod 7 outward from the fixed groove 6 by abutting against the wall of the limiting groove 19. The locking assembly includes a threaded hole 22, which is formed through the groove wall of the fixed groove 6. A locking bolt 23 is threaded into the threaded hole 22. One end of the locking bolt 23 extends outward from the fixed seat 5, and the other end extends into the fixed groove 6 and abuts against the fixed rod 7. Rotating the locking bolt 23 causes it to move within the threaded hole 22. By controlling whether it abuts against the fixed rod 7, the locking mechanism is controlled. The fixing rod 7 is fixed in a Y-shaped triangular array with the two clamping blocks 13. The two clamping blocks 13 are arranged in a triangular array with the eccentric shaft 3. The clamping disk 2 limits the triangular rotor forming part 4. The revolution ratio between the triangular rotor forming part 4 and the eccentric shaft 3 is 2:3, that is: the eccentric shaft 3 rotates 3 times, and the triangular rotor forming part 4 rotates 2 times. The reduction motor 15 will drive the eccentric shaft 3 to rotate 1 revolution. According to the revolution ratio between the eccentric shaft 3 and the triangular rotor forming part 4, the triangular rotor forming part 4 will rotate two-thirds of a revolution, thereby replacing the downward end face of the triangular rotor forming part 4.

[0020] 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 illustrative of the 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 protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision milling device for a triangular rotor of a rotary engine, comprising a mounting base (1), characterized in that, The mounting base (1) is provided with a first driving component and a second driving component. A clamping plate (2) is fixedly installed at the output end of the first driving component. An eccentric shaft (3) is fixedly installed on the clamping plate (2). A triangular rotor forming part (4) is placed on both the eccentric shaft (3) and the clamping plate (2). A fixing seat (5) is fixedly installed on the eccentric shaft (3). A fixing groove (6) is opened through the fixing seat (5). A fixing rod (7) is slidably connected in the fixing groove (6). An elastic component is provided in both the fixing rod (7) and the fixing groove (6). A locking assembly is provided on the fixed base (5), and a support base (8) is fixedly installed on the mounting base (1). A moving groove (9) is provided on the support base (8). A threaded rod (10) is rotatably connected to the moving groove (9) through a bearing. One end of the threaded rod (10) is fixedly connected to the second drive assembly. A threaded sleeve (11) is threadedly connected to the threaded rod (10). A moving block (12) is fixedly sleeved on the outer wall of the threaded sleeve (11). One end of the moving block (12) extends through to the outside of the support base (8) and is fixedly connected to a clamping block (13).

2. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The first drive assembly includes a first mounting slot (14), which is opened on the outer side wall of the mounting base (1). A geared motor (15) is fixedly installed in the first mounting slot (14). A drive rod (16) is fixedly installed at the output end of the geared motor (15) through a coupling. The drive rod (16) is fixedly connected to the clamping plate (2).

3. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The second drive assembly includes a second mounting slot (17), which is opened on the outer side wall of the mounting base (1). A drive motor (18) is fixedly installed in the second mounting slot (17), and the output end of the second drive motor (18) is fixedly connected to the threaded rod (10) through a coupling.

4. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The elastic component includes a limiting groove (19), which is opened at one end of the fixing rod (7) located in the fixing groove (6). A limiting rod (20) is fixedly connected in the fixing groove (6). One end of the limiting rod (20) extends into the limiting groove (19). A spring (21) is sleeved on the limiting rod (20). The two ends of the spring (21) abut against the groove walls of the fixing groove (6) and the limiting groove (19), respectively.

5. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The locking assembly includes a threaded hole (22) which penetrates the groove wall of the fixing groove (6) and a locking bolt (23) is threaded into the threaded hole (22).

6. The high-precision milling device for the triangular rotor of a rotary engine according to claim 5, characterized in that: One end of the locking bolt (23) extends outside the fixing seat (5), and the other end of the locking bolt (23) extends into the fixing groove (6) and abuts against the fixing rod (7).

7. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The fixing rod (7) and the two clamping blocks (13) are arranged in a Y-shaped triangular array, and the two clamping blocks (13) and the eccentric shaft (3) are arranged in a triangular array.

8. The high-precision milling device for the triangular rotor of a rotary engine according to claim 1, characterized in that: The revolution ratio between the triangular rotor forming part (4) and the eccentric shaft (3) is 2:3.

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