A high-strength powder metallurgy combined internal gear ring and its preparation method

Abstract

The present invention discloses a high-strength powder metallurgy combined internal gear ring and a preparation method thereof, relating to the technical field of internal gear rings. The high-strength powder metallurgy combined internal gear ring is composed of a segmented gear ring, a connecting rod, a second fitting rod and a third fitting rod. A fitting groove is formed at the top of the segmented gear ring, and mounting grooves are symmetrically formed on the front and back surfaces of the segmented gear ring. The second fitting rods are symmetrically mounted on the back surface of the connecting rod, and a first fitting hole is penetrated through the inner wall of the back surface of the mounting groove. In the present invention, four segmented gear rings are spliced into a ring shape. Subsequently, a fixing rod is inserted into the front surface of the segmented gear ring and into the third fitting hole, and the second fitting rod is inserted into the first fitting hole, so that the four segmented gear rings can be spliced together to form a combined internal gear ring. When one of the segmented gear rings on the combined internal gear ring is damaged, only the single segmented gear ring needs to be replaced, reducing the material waste and capital waste caused by replacing the whole internal gear ring when one part of the traditional internal gear ring is damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of internal gear rings, and particularly to a high-strength powder metallurgy combined internal gear ring and a preparation method thereof. Background Art

[0002] The internal gear ring is the outer gear ring among the planet gears. The convex teeth on its inner wall mesh with the external gear inside the internal gear ring, so as to transmit kinetic energy. When a single-piece internal gear ring is damaged at one place, the whole internal gear ring needs to be replaced. The replacement steps are troublesome and it wastes funds.

[0003] The defects of the existing internal gear rings are as follows:

[0004] 1. The prior art JP2005291237A discloses that the internal gear of the internal gear is integrated into the inner ring of the bearing. This technology does not have a structure for separating and splicing the internal gear ring. When the internal gear ring is damaged at one place, the whole internal gear ring needs to be replaced, which is troublesome and wastes funds. Therefore, a high-strength powder metallurgy combined internal gear ring that is spliced by dividing the internal gear ring into multiple segments is needed to solve this problem.

[0005] 2. The prior art JPH0798045A discloses an inner ring gear and its manufacturing. If this technology divides the internal gear ring into multiple segments and then splices the multiple partial structures to obtain the internal gear ring, the multiple parts of the internal gear ring are prone to generate front-to-back displacement during operation, resulting in increased wear at the splicing part of the internal gear ring and affecting the service life of the internal gear ring. Therefore, a high-strength powder metallurgy combined internal gear ring that can reduce the wear at the splicing part of the spliced internal gear ring is needed to solve this problem.

[0006] 3. The prior art US20070197340A1 discloses an inner ring gear with an integrated hub part and a manufacturing method thereof. This technology does not have a structure that facilitates the replacement of the internal gear ring. When the internal gear ring is divided into several segments, it is necessary to splice the partial internal gear ring structures of multiple segments into a complete internal gear ring, which requires connecting multiple segments with bolts. The connection method using bolts requires rotating the bolts multiple times, and the process is complex. Therefore, a high-strength powder metallurgy combined internal gear ring that can facilitate the disassembly and installation of the spliced internal gear ring is needed to solve this problem.

[0007] 4. The prior art CN106122446B discloses an internal gear ring and unit teeth constituting the internal gear ring, which reduces the processing difficulty during the preparation process. If this technology divides the internal gear ring into multiple segments and then splices the multiple structures into a complete spliced internal gear ring, the internal gear ring is prone to generate frictional heat between the connecting components during operation, thereby accelerating the loss of the internal gear ring. Therefore, a high-strength powder metallurgy combined internal gear ring that can timely dissipate the heat at the contact parts of the various components of the spliced internal gear ring is needed to solve this problem. Summary of the Invention

[0008] An object of the present application is to provide a high-strength powder metallurgy combined internal gear ring and a preparation method thereof, which can solve the technical problems proposed in the prior art.

[0009] To achieve the above object, the present invention provides the following technical solution: A high-strength powder metallurgy combined internal gear ring, the high-strength powder metallurgy combined internal gear ring is composed of a segmented gear ring, a connecting rod, a second fitting rod and a third fitting rod. A fitting groove is opened at the top of the segmented gear ring, and mounting grooves are symmetrically opened on the front and back surfaces of the segmented gear ring. The second fitting rod is symmetrically mounted on the back surface of the connecting rod. Fitting holes four are symmetrically penetrated through both sides of the connecting rod. A spring is mounted on the inner wall of one side of the fitting hole four. One end of the spring is mounted with a third fitting rod. A convex block is mounted on the front surface of the third fitting rod. A fitting hole one is penetrated through the inner wall of the back surface of the mounting groove, and the second fitting rod is located inside the fitting hole one. A fitting hole two is opened on the inner wall of one side of the mounting groove, and the third fitting rod is located inside the fitting hole two.

[0010] Preferably, convex teeth are provided on the inner wall of the segmented gear ring, and through holes are penetrated through the front surface of the segmented gear ring.

[0011] Preferably, the high-strength powder metallurgy combined internal gear ring further includes a fitting block and a fixing rod. A fitting block is mounted on one side of the segmented gear ring, and the fitting block is located inside the fitting groove at the top of the adjacent segmented gear ring. A fixing rod is penetrated and mounted on the front surface of the segmented gear ring, and one end of the fixing rod penetrates through the back surface of the segmented gear ring. A fitting hole three is penetrated through the front surface of the fitting block, and the fixing rod is located inside the fitting hole three.

[0012] Preferably, the mounting groove is filled with thermal conductive silicone grease.

[0013] Preferably, leak-proof membranes are symmetrically mounted on the front surface of the segmented gear ring, and the leak-proof membranes are located in front of the mounting grooves.

[0014] Preferably, the leak-proof membrane is one of a polyvinyl chloride membrane or a polyethylene membrane.

[0015] Preferably, the outer side of the fixing rod is coated with a glue solution.

[0016] Preferably, the glue solution is a hot melt adhesive.

[0017] Preferably, the preparation method of the high-strength powder metallurgy combined internal gear ring includes the following steps:

[0018] S1. Form an integral-shaped workpiece with a segmented gear ring, a fitting block, convex teeth, a fitting groove and a mounting groove by powder metallurgy method;

[0019] S2. Use a drilling machine to process through holes, fitting holes 1, fitting holes 2, and fitting holes 3 on the integrally shaped workpiece obtained in step S1 respectively;

[0020] S3. Use powder metallurgy to form a workpiece with a connecting rod, a fitting rod 2, a fitting hole 4, and a convex block, then connect the spring to the inner wall of one side of the fitting hole 4 through hot melt adhesive, and weld the other end of the spring to the fitting rod 3;

[0021] S4. Splice four segmental gear rings into a ring shape, and make the fitting block fit inside the fitting groove of adjacent segmental gear rings. Subsequently, apply hot melt adhesive on the outer side of the fixing rod, and then insert the fixing rod into the front of the segmental gear ring and into the fitting hole 3;

[0022] S5. Insert the fitting rod 2 of the workpiece in step S3 into the fitting hole 1, and then insert the fitting rod 3 into the fitting hole 2, thereby facilitating the connection of two adjacent segmental gear rings. By moving the convex block to drive the fitting rod 3 out of the fitting hole 2, it is convenient to disassemble and replace the segmental gear ring.

[0023] Preferably, step S5 further includes the following steps:

[0024] S51. Fill the installation groove with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film on the front and back of the segmental gear ring to seal the installation groove.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] 1. The present invention splices four segmental gear rings into a ring shape, then inserts the fixing rod into the front of the segmental gear ring and into the fitting hole 3, and inserts the fitting rod 2 into the fitting hole 1, so that the four segmental gear rings can be spliced together to form a combined internal gear ring. When one segmental gear ring on the combined internal gear ring is damaged, only a single segmental gear ring needs to be replaced, reducing the material waste and capital waste caused by replacing the entire internal gear ring when one part of the traditional internal gear ring is damaged.

[0027] 2. The present invention makes the fitting block fit inside the fitting groove of adjacent segmental gear rings. Subsequently, apply hot melt adhesive on the outer side of the fixing rod, and insert the fixing rod into the segmental gear ring and the fitting block. The fitting block can avoid the mutual displacement of the adjacent two segmental gear rings by fitting into the fitting groove. The fixing rod can be inserted into the segmental gear ring and the fitting block, thereby avoiding the left-right movement of the fitting block inside the fitting groove, and further ensuring the stability of the connection between the adjacent two segmental gear rings.

[0028] 3. The present invention then inserts the fitting rod 3 into the fitting hole 2, thereby facilitating the connection of two adjacent segmental gear rings. By moving the convex block to drive the fitting rod 3 out of the fitting hole 2, it is convenient to disassemble and replace the segmental gear ring.

[0029] 4. The present invention fills the installation groove with thermal grease, which is used to conduct heat at the contact part between the connecting rod and the segment gear ring inside the installation groove, increasing the heat transfer speed from the connecting rod to the segment gear ring, thereby reducing the damage caused by heat accumulation in the connecting rod and improving the service life of the combined internal gear ring. Then, the anti-leakage film is glued to the front and back of the segment gear ring by gluing to seal the installation groove and reduce the leakage of the thermal grease inside the installation groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of the present invention;

[0031] Figure 2 is a schematic diagram of the segment gear ring splicing structure of the present invention;

[0032] Figure 3 is a schematic diagram of the segment gear ring structure of the present invention;

[0033] Figure 4 is a radiation diagram of the segment gear ring of the present invention;

[0034] Figure 5 is a schematic diagram of the structure at position A of the present invention;

[0035] Figure 6 is a schematic diagram of the connecting rod structure of the present invention;

[0036] Figure 7 is a schematic diagram of the structure of the third fitting rod of the present invention;

[0037] Figure 8 is a schematic diagram of the fitting block structure of the present invention

[0038] Figure 9 is a flow chart of the preparation method of the present invention.

[0039] In the figure: 1. Segment gear ring; 2. Fitting block; 3. Convex tooth; 4. Through hole; 5. Fitting groove; 6. Installation groove; 7. Connecting rod; 8. Second fitting rod; 9. Fourth fitting hole; 10. Spring; 11. Third fitting rod; 12. Convex block; 13. First fitting hole; 14. Second fitting hole; 15. Fixed rod; 16. Third fitting hole; 17. Anti-leakage film. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8, A high-strength powder metallurgy combined internal gear ring. The high-strength powder metallurgy combined internal gear ring is composed of a segmented gear ring 1, a connecting rod 7, a second fitting rod 8, and a third fitting rod 11. A fitting groove 5 is provided at the top of the segmented gear ring 1. Mounting grooves 6 are symmetrically provided on the front and back surfaces of the segmented gear ring 1. Second fitting rods 8 are symmetrically mounted on the back surface of the connecting rod 7. Fourth fitting holes 9 are symmetrically penetrated through both sides of the connecting rod 7. A spring 10 is mounted on the inner wall of one side of the fourth fitting hole 9. One end of the spring 10 is mounted with a third fitting rod 11. A convex block 12 is mounted on the front surface of the third fitting rod 11. A first fitting hole 13 is penetrated through the inner wall of the back surface of the mounting groove 6, and the second fitting rod 8 is located inside the first fitting hole 13. A second fitting hole 14 is provided on the inner wall of one side of the mounting groove 6, and the third fitting rod 11 is located inside the second fitting hole 14. Four segmented gear rings 1 are spliced into an annular combined internal gear ring. The convex teeth 3 can mesh with the external gear placed inside the segmented gear ring 1. The fitting groove 5 can provide a fitting position for the fitting block 2. The mounting groove 6 can provide a storage space for the connecting rod 7. The connecting rod 7 can connect the two second fitting rods 8. The second fitting rod 8 can be fitted into the first fitting hole 13, so that two adjacent segmented gear rings 1 are spliced together. The fourth fitting hole 9 can provide a mounting position for the spring 10, and at the same time can provide guidance for the third fitting rod 11 and provide a storage space for the third fitting rod 11. The third fitting rod 11 can fix the connecting rod 7 by fitting into the second fitting hole 14, preventing the connecting rod 7 and the second fitting rod 8 from falling off the mounting groove 6. The convex block 12 can provide a pushing position for people to push the third fitting rod 11, facilitating people to push the convex block 12 to drive the third fitting rod 11 to leave the second fitting hole 14. The first fitting hole 13 can provide an insertion position for the second fitting rod 8. The second fitting hole 14 can provide an insertion position for the third fitting rod 11.

[0044] Convex teeth 3 are provided on the inner wall of the segmented gear ring 1. A through hole 4 is penetrated through the front surface of the segmented gear ring 1. The through hole 4 can be a insertion channel for bolts or others. The convex teeth 3 can mesh with the external gear placed inside the segmented gear ring 1 to transfer kinetic energy.

[0045] The high-strength powder metallurgy combined internal gear ring further includes a fitting block 2 and a fixing rod 15. A fitting block 2 is mounted on one side of the segmented gear ring 1, and the fitting block 2 is located inside the fitting groove 5 at the top of the adjacent segmented gear ring 1. A fixing rod 15 is penetrated and mounted on the front surface of the segmented gear ring 1, and one end of the fixing rod 15 penetrates through the back surface of the segmented gear ring 1. A third fitting hole 16 is penetrated through the front surface of the fitting block 2, and the fixing rod 15 is located inside the third fitting hole 16. The fitting block 2 can prevent the adjacent two segmented gear rings 1 from having a fitting displacement by fitting into the fitting groove 5. The fixing rod 15 can prevent the fitting block 2 from moving left and right inside the fitting groove 5 by inserting into the segmented gear ring 1 and the fitting block 2, further ensuring the stability of the connection between the adjacent two segmented gear rings 1. The third fitting hole 16 can provide an insertion position for the fixing rod 15.

[0046] The inside of the installation groove 6 is filled with thermal conductive silicone grease, which is used to conduct heat at the contact part between the connecting rod 7 and the segment gear ring 1 inside the installation groove 6, increasing the heat transfer speed from the connecting rod 7 to the segment gear ring 1, thereby reducing the damage caused by the heat accumulation of the connecting rod 7, and thus improving the service life of the combined internal gear ring.

[0047] Leak-proof films 17 are symmetrically installed on the front surface of the segment gear ring 1, and the leak-proof films 17 are located in front of the installation groove 6. The leak-proof films 17 can reduce the leakage of the thermal conductive silicone grease inside the installation groove 6. The leak-proof films 17 are one of polyvinyl chloride films or polyethylene films.

[0048] The outer side of the fixing rod 15 is coated with glue, and the glue is hot melt adhesive.

[0049] The preparation method of the high-strength powder metallurgy combined internal gear ring includes the following steps:

[0050] S1. Form a workpiece with an integral shape of a segment gear ring 1, a fitting block 2, a convex tooth 3, a fitting groove 5 and an installation groove 6 by powder metallurgy method;

[0051] S2. Use a drilling machine to process through holes 4, fitting holes one 13, fitting holes two 14 and fitting holes three 16 on the integral-shaped workpiece obtained in step S1 respectively;

[0052] S3. Form a workpiece with a connecting rod 7, a fitting rod two 8, a fitting hole four 9 and a convex block 12 by powder metallurgy method, then connect the spring 10 to the inner wall of one side of the fitting hole four 9 through hot melt adhesive, and weld the other end of the spring 10 to the fitting rod three 11;

[0053] S4. Splice four segment gear rings 1 into a ring shape, and make the fitting block 2 fit inside the fitting groove 5 of the adjacent segment gear ring 1. Then coat the outer side of the fixing rod 15 with hot melt adhesive, and then insert the fixing rod 15 into the front surface of the segment gear ring 1 and into the fitting hole three 16;

[0054] S5. Insert the fitting rod two 8 of the workpiece in step S3 into the fitting hole one 13, and then insert the fitting rod three 11 into the fitting hole two 14, thereby facilitating the connection of two adjacent segment gear rings 1. By moving the convex block 12 to drive the fitting rod three 11 to be withdrawn from the fitting hole two 14, it is convenient to disassemble and replace the segment gear ring 1.

[0055] Step S5 also includes the following steps:

[0056] S51. Fill the installation groove 6 with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film 17 on the front and back surfaces of the segment gear ring 1 to seal the installation groove 6.

[0057] Example 1:

[0058] 1. Form a workpiece with an integral shape of a segmented gear ring 1, a fitting block 2, a convex tooth 3, a fitting groove 5 and a mounting groove 6 by powder metallurgy method;

[0059] 2. Use a drilling machine to respectively machine through holes 4, a first fitting hole 13, a second fitting hole 14 and a third fitting hole 16 on the workpiece with an integral shape obtained in step 1;

[0060] 3. Form a workpiece with a connecting rod 7, a second fitting rod 8, a fourth fitting hole 9 and a convex block 12 by powder metallurgy method, then connect a spring 10 to the inner wall of one side of the fourth fitting hole 9 through hot melt adhesive, and weld the other end of the spring 10 to a third fitting rod 11;

[0061] 4. Splice four segmented gear rings 1 into a ring shape, and make the fitting block 2 fit inside the fitting groove 5 of adjacent segmented gear rings 1. Subsequently, coat the outer side of the fixing rod 15 with hot melt adhesive, and then insert the fixing rod 15 into the front surface of the segmented gear ring 1 and into the third fitting hole 16;

[0062] 5. Insert the second fitting rod 8 of the workpiece in step 3 into the first fitting hole 13, and then insert the third fitting rod 11 into the second fitting hole 14, thereby facilitating the connection of two adjacent segmented gear rings 1. By moving the convex block 12 to drive the third fitting rod 11 to be withdrawn from the second fitting hole 14, it is convenient to disassemble and replace the segmented gear ring 1;

[0063] 6. Fill the mounting groove 6 with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film 17 to the front and back surfaces of the segmented gear ring 1 to seal the mounting groove 6.

[0064] Example 2:

[0065] 1. Form a workpiece with an integral shape of a segmented gear ring 1, a fitting block 2, a convex tooth 3, a fitting groove 5 and a mounting groove 6 by powder metallurgy method;

[0066] 2. Use a drilling machine to respectively machine through holes 4, a first fitting hole 13, a second fitting hole 14 and a third fitting hole 16 on the workpiece with an integral shape obtained in step 1;

[0067] 3. Form a workpiece with a connecting rod 7, a second fitting rod 8, a fourth fitting hole 9 and a convex block 12 by powder metallurgy method, then connect a spring 10 to the inner wall of one side of the fourth fitting hole 9 through hot melt adhesive, and weld the other end of the spring 10 to a third fitting rod 11;

[0068] 4. Splice four segmented gear rings 1 into a ring shape, and make the fitting block 2 fit inside the fitting groove 5 of adjacent segmented gear rings 1. Subsequently, coat the outer side of the fixing rod 15 with hot melt adhesive, and then insert the fixing rod 15 into the front surface of the segmented gear ring 1 and into the third fitting hole 16;

[0069] V. Insert the fitting rod II (8) of the workpiece in Step 3 into the fitting hole I (13), and then insert the fitting rod III (11) into the fitting hole II (14), thereby facilitating the connection of two adjacent segment gear rings (1). By moving the convex block (12) to drive the fitting rod III (11) to be withdrawn from the fitting hole II (14), it is convenient to disassemble and replace the segment gear ring (1).

[0070] Embodiment 3:

[0071] I. A workpiece with an integrated shape of a segment gear ring (1), a fitting block (2), a convex tooth (3), a fitting groove (5), and a mounting groove (6) is formed by powder metallurgy method;

[0072] II. Use a drilling machine to respectively machine through holes (4), fitting hole I (13), fitting hole II (14), and fitting hole III (16) on the integrated workpiece obtained in Step I;

[0073] III. Splice four segment gear rings (1) into a ring shape, and make the fitting block (2) fit inside the fitting groove (5) of adjacent segment gear rings (1). Then, coat the outer side of the fixing rod (15) with hot melt adhesive, and then insert the fixing rod (15) into the front of the segment gear ring (1) and into the fitting hole III (16);

[0074] IV. Fill the mounting groove (6) with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film (17) on the front and back of the segment gear ring (1) to seal the mounting groove (6).

[0075] Embodiment 4:

[0076] I. A workpiece with an integrated shape of a segment gear ring (1), a fitting block (2), a convex tooth (3), a fitting groove (5), and a mounting groove (6) is formed by powder metallurgy method;

[0077] II. Use a drilling machine to respectively machine through holes (4), fitting hole I (13), fitting hole II (14), and fitting hole III (16) on the integrated workpiece obtained in Step I;

[0078] III. A workpiece with a connecting rod (7), a fitting rod II (8), and a convex block (12) is formed by powder metallurgy method;

[0079] IV. Splice four segment gear rings (1) into a ring shape, and make the fitting block (2) fit inside the fitting groove (5) of adjacent segment gear rings (1). Then, coat the outer side of the fixing rod (15) with hot melt adhesive, and then insert the fixing rod (15) into the front of the segment gear ring (1) and into the fitting hole III (16);

[0080] V. Insert the fitting rod II (8) of the workpiece in Step III into the fitting hole I (13);

[0081] VI. Fill the mounting groove (6) with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film (17) on the front and back of the segment gear ring (1) to seal the mounting groove (6).

[0082] Working principle: Before using the high-strength powder metallurgy combined internal gear ring, it should be checked whether there are any problems affecting its use. An integral workpiece with a segment gear ring 1, a fitting block 2, a convex tooth 3, a fitting groove 5, and an installation groove 6 is formed by powder metallurgy. A through hole 4, a first fitting hole 13, a second fitting hole 14, and a third fitting hole 16 are respectively machined on the integral workpiece using a drilling machine. A workpiece with a connecting rod 7, a second fitting rod 8, a fourth fitting hole 9, and a convex block 12 is formed by powder metallurgy. Then, the spring 10 is connected to the inner wall of one side of the fourth fitting hole 9 by hot melt adhesive, and the other end of the spring 10 is welded to the third fitting rod 11. The four segment gear rings 1 are spliced into a ring shape, and the fitting block 2 is fitted inside the fitting groove 5 of the adjacent segment gear ring 1. Subsequently, the outer side of the fixing rod 15 is coated with hot melt adhesive, and then the fixing rod 15 is inserted into the front of the segment gear ring 1 and into the third fitting hole 16. The fitting block 2 can avoid the mutual displacement of the fitting of the adjacent two segment gear rings 1 by fitting into the fitting groove 5. The fixing rod 15 can be inserted into the segment gear ring 1 and the fitting block 2 to avoid the left-right movement of the fitting block 2 inside the fitting groove 5, further ensuring the stability of the connection between the adjacent two segment gear rings 1. The second fitting rod 8 is inserted into the first fitting hole 13, and then the third fitting rod 11 is inserted into the second fitting hole 14, thereby facilitating the connection of two adjacent segment gear rings 1. By moving the convex block 12 to drive the third fitting rod 11 to be withdrawn from the second fitting hole 14, it is convenient to disassemble and replace the segment gear ring 1. Thermal conductive silicone grease is filled in the installation groove 6, and then the leak-proof film 17 is glued to the front and back of the segment gear ring 1 by gluing to seal the installation groove 6, reducing the leakage of the thermal conductive silicone grease inside the installation groove 6.

[0083] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention, and any reference signs in the claims should not be regarded as limiting the rights involved.

Claims

1. A high-strength powder metallurgy combined internal gear ring, characterized in that: The high-strength powder metallurgy combined internal gear ring is composed of a segmented gear ring (1), a connecting rod (7), a second fitting rod (8), and a third fitting rod (11). A fitting groove (5) is formed at the top of the segmented gear ring (1). Mounting grooves (6) are symmetrically formed on the front and back surfaces of the segmented gear ring (1). The second fitting rods (8) are symmetrically mounted on the back surface of the connecting rod (7). Fitting holes four (9) are symmetrically formed through both sides of the connecting rod (7). A spring (10) is mounted on the inner wall of one side of the fitting hole four (9). One end of the spring (10) is mounted with a third fitting rod (11). A convex block (12) is mounted on the front surface of the third fitting rod (11). A fitting hole one (13) is formed through the inner wall of the back surface of the mounting groove (6), and the second fitting rod (8) is located inside the fitting hole one (13). A fitting hole two (14) is formed on the inner wall of one side of the mounting groove (6), and the third fitting rod (11) is located inside the fitting hole two (14). The high-strength powder metallurgy combined internal gear ring further includes a fitting block (2) and a fixing rod (15). A fitting block (2) is mounted on one side of the segmented gear ring (1), and the fitting block (2) is located inside the fitting groove (5) at the top of the adjacent segmented gear ring (1). The fixing rod (15) is mounted through the front surface of the segmented gear ring (1), and one end of the fixing rod (15) penetrates through the back surface of the segmented gear ring (1). A fitting hole three (16) is formed through the front surface of the fitting block (2), and the fixing rod (15) is located inside the fitting hole three (16).

2. The high-strength powder metallurgy combined internal gear ring according to claim 1, wherein: Convex teeth (3) are provided on the inner wall of the segmented gear ring (1). A through hole (4) is formed through the front surface of the segmented gear ring (1).

3. A high-strength powder metallurgy combined internal gear ring according to claim 1, characterized in that: The mounting groove (6) is filled with thermal conductive silicone grease.

4. A high-strength powder metallurgy combined internal gear ring according to claim 1, characterized in that: Leak-proof films (17) are symmetrically mounted on the front surface of the segmented gear ring (1), and the leak-proof films (17) are located in front of the mounting grooves (6).

5. A high-strength powder metallurgy combined internal gear ring according to claim 4, characterized in that: The leak-proof film (17) is one of a polyvinyl chloride film or a polyethylene film.

6. The high-strength powder metallurgy combined internal gear ring according to claim 1, characterized in that: An adhesive solution is coated on the outer side of the fixing rod (15).

7. The high-strength powder metallurgy combined internal gear ring according to claim 6, characterized in that: The adhesive solution is a hot melt adhesive.

8. A method for preparing a high-strength powder metallurgy combined internal gear ring according to any one of claims 1 to 7, characterized in that: The preparation method of the high-strength powder metallurgy combined internal gear ring includes the following steps: S1. A workpiece with an integrated shape of a segmented gear ring (1), a fitting block (2), convex teeth (3), a fitting groove (5), and a mounting groove (6) is formed by powder metallurgy method. S2. A through hole (4), a fitting hole one (13), a fitting hole two (14), and a fitting hole three (16) are respectively machined on the workpiece with an integrated shape obtained in step S1 by using a drilling machine tool. S3. A workpiece with a connecting rod (7), a second fitting rod (8), a fitting hole four (9), and a convex block (12) is formed by powder metallurgy method. Then, the spring (10) is connected to the inner wall of one side of the fitting hole four (9) by hot melt adhesive, and the other end of the spring (10) is welded to the third fitting rod (11). S4. Four segmented gear rings (1) are spliced into a ring shape, and the fitting block (2) is fitted inside the fitting groove (5) of the adjacent segmented gear ring (1). Then, hot melt adhesive is coated on the outer side of the fixing rod (15), and then the fixing rod (15) is inserted into the front surface of the segmented gear ring (1) and into the fitting hole three (16). S5. Insert the second fitting rod (8) of the workpiece in step S3 into the first fitting hole (13), and then insert the third fitting rod (11) into the second fitting hole (14), thereby facilitating the connection of two adjacent segment gear rings (1). By moving the convex block (12) to drive the third fitting rod (11) to be withdrawn from the second fitting hole (14), it is convenient to disassemble and replace the segment gear ring (1).

9. The preparation method of a high-strength powder metallurgy combined internal gear ring according to claim 8, wherein: The following steps are also included in the said S5: S51. Fill the installation groove (6) with thermal conductive silicone grease, and then use the gluing method to glue the leak-proof film (17) on the front and back of the segment gear ring (1) to seal the installation groove (6).

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