A pure rolling live gear reduction transmission device with a three-layer rolling structure

Abstract

A pure rolling gear reducer with a three-layer rolling structure, belonging to the technical field of precision transmission, includes a fixedly connected front gear ring and a rear gear ring, with identical tooth parameters. An eccentric shaft is rotatably connected within the front and rear gear rings. The eccentric shaft comprises two eccentric sections, each mounted with a ringless cylindrical roller bearing. Shock generators are mounted on the outer rings of the ringless cylindrical roller bearings. A front gear carrier is located within the front gear ring, and a rear gear carrier is located within the rear gear ring. Both the front and rear gear carriers have the same number of through-holes for moving teeth, each through-hole containing a set of moving teeth. Each moving tooth structure includes a three-stage moving tooth mechanism. This invention achieves rolling at all contact points, reducing wear on the gear reducer and improving its operating efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of precision transmission, and in particular to a pure rolling live tooth reduction transmission device with a three-layer rolling structure. Background Technology

[0002] While movable gear reducers offer advantages such as high load-bearing capacity and rigidity, traditional movable gear reducers suffer from sliding friction between their internal moving parts. This friction leads to significant wear and reduced service life, resulting in lower transmission efficiency and severely hindering their wider application. These are the shortcomings of existing technologies. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pure rolling tooth reduction transmission device with a three-layer rolling structure, which addresses the shortcomings of the existing technology, realizes rolling at all contact points, reduces the wear of the tooth reducer, and improves the operating efficiency of the tooth reducer.

[0004] This solution is achieved through the following technical measures: a pure rolling live gear reduction transmission device with a three-layer rolling structure, comprising a fixedly connected front gear ring and a rear gear ring, both of which are internal gears, and the gear tooth parameters of the front gear ring and the rear gear ring are the same. During installation, the gear tooth angle phase difference between the front gear ring and the rear gear ring is half a tooth. A live gear carrier is rotatably connected inside the front gear ring and the rear gear ring, the live gear carrier including a front live gear carrier and a rear live gear carrier, the front live gear carrier and the rear live gear carrier being fixed. The connection includes an eccentric shaft rotatably connected within the movable gear frame. The eccentric shaft comprises two eccentric structures respectively matched to the front and rear gear rings, with a phase angle difference of 180 degrees between the two eccentric structures. Each of the two eccentric structures is equipped with a cylindrical roller bearing without an outer ring. Shock generators are mounted on the outer rings of these cylindrical roller bearings. A front movable gear frame is located within the front gear ring, and a rear movable gear frame is located within the rear gear ring. Both the front and rear movable gear frames are provided with the same number of rectangular movable teeth. Each of the three rows of movable teeth is equipped with a set of movable tooth structures within a rectangular through-hole. The first row of movable tooth structures includes a first row of rolling spindles and two sliding sleeves II, rolling sleeves II, or rolling bearings II without inner rings located at both ends of the first row of rolling spindles. The second row of movable tooth structures includes a second row of rolling spindles. The third row of movable tooth structures includes a third row of rolling spindles and two sliding sleeves III, rolling sleeves III, or rolling bearings III without inner rings located at both ends of the third row of rolling spindles. The middle part of the first row of rolling spindles contacts the shock wave generator. The sliding sleeves II, rolling sleeves II, or rolling bearings II without inner rings contact the second row of rolling spindles. The two ends of the second row of rolling spindles contact the sliding sleeves III, rolling sleeves III, or rolling bearings III without inner rings. The middle part of the third row of rolling spindles contacts the teeth on the front or rear gear ring. The number of teeth on the front and rear gear rings is n. The number of movable tooth structures is k = (n+1) / m, where m is the tooth extraction coefficient, which can be an integer of 1, 2, or 3.

[0005] Preferably, the outer diameter of the sliding sleeve III, rolling sleeve III, or rolling bearing III without an inner ring is the same as the outer diameter of both ends of the second row of rolling mandrels and the outer diameter of the sliding sleeve II, rolling sleeve II, or rolling bearing II without an inner ring, and is smaller than the outer diameter of the sliding sleeve I, rolling sleeve I, or rolling bearing I without an inner ring.

[0006] Preferably, when the eccentric shaft rotates, the eccentric structure drives the shock generator to move around the eccentric shaft rotation axis. The outer ringless cylindrical roller bearing and the shock generator are in rolling motion. The shock generator pushes the first row of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. The first row of movable gear mechanism pushes the second row of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. The second row of movable gear mechanism pushes the third stage of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. The second row of rolling spindles is in contact with the sliding sleeve II or rolling sleeve II or inner ringless rolling bearing II, sliding sleeve III or rolling sleeve III or inner ringless rolling bearing III and undergoes rolling motion. The third row of rolling spindles is in rolling motion with the sliding sleeve III or rolling sleeve III or inner ringless rolling bearing III and the gear teeth on the front gear ring and rear gear ring.

[0007] Preferably, the middle part of the first row of rolling spindles is in direct contact with the shock generator.

[0008] Preferably, a sliding sleeve I, a rolling sleeve I, or a rolling bearing I without an inner ring is provided in the middle of the first row of rolling spindles, and the sliding sleeve I, the rolling sleeve I, or the rolling bearing I without an inner ring is in contact with the shock generator.

[0009] Preferably, the middle part of the third row of rolling mandrels directly contacts the gear teeth on the front or rear gear ring, and a retaining ring is provided at one end of each of the two sliding sleeves III, rolling sleeves III, or rolling bearings III without inner rings.

[0010] Preferably, a sliding sleeve IV, a rolling sleeve IV, or a rolling bearing IV without an inner ring is provided in the middle of the third row of rolling mandrels, and the third row of rolling mandrels contacts the gear teeth on the front gear ring or the rear gear ring through the sliding sleeve IV, the rolling sleeve IV, or the rolling bearing IV without an inner ring.

[0011] Preferably, an intermediate movable gear frame is provided between the front movable gear frame and the rear movable gear frame, and the front movable gear frame, the rear movable gear frame and the intermediate movable gear frame are fixedly connected. An angular contact ball bearing is provided between the front movable gear frame and the front gear ring, and an angular contact ball bearing is provided between the rear movable gear frame and the rear gear ring.

[0012] Preferably, the intermediate movable tooth frame is provided with a movable tooth rectangular through hole, and the number of movable tooth rectangular through holes on the front movable tooth frame, the rear movable tooth frame, and the intermediate movable tooth frame is the same.

[0013] Preferably, a tapered roller bearing is installed in the rear gear carrier, and a rear bearing cap is fixedly connected to the rear gear carrier. A tapered roller bearing is installed in the front gear carrier, and a front bearing cap is fixedly connected to the front gear carrier. The two tapered roller bearings are respectively installed at both ends of the eccentric shaft, and the cylindrical roller bearing without an outer ring is located between the two tapered roller bearings. A skeleton oil seal is provided between the front gear carrier and the front gear ring.

[0014] This invention proposes a pure rolling live gear reducer with a three-layer rolling structure. The live gear transmission with a pure rolling structure is simple and has a lower processing cost. The reducer uses rolling elements instead of sliding elements in the original structure, thus reducing the sensitivity to processing accuracy and making it less prone to wear. At the same time, it will greatly improve the operating efficiency of the live gear reducer.

[0015] Therefore, it is evident that the present invention has outstanding substantive features and significant progress compared with the prior art, and the beneficial effects of its implementation are also obvious. Attached Figure Description

[0016] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0018] Figure 2 for Figure 1 Enlarged structural diagram of section II;

[0019] Figure 3 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0020] Figure 4 for Figure 3 Enlarged structural diagram of section III.

[0021] In the diagram: 1-Eccentric shaft, 2-Front gear carrier, 3-Rear gear carrier, 4-Intermediate gear carrier, 5-Rear bearing cap, 6-Shock generator, 7-Sliding sleeve I or rolling sleeve I or rolling bearing I without inner ring, 8-Sliding sleeve II or rolling sleeve II or rolling bearing II without inner ring, 9-Sliding sleeve III or rolling sleeve III or rolling bearing III without inner ring, 10-First row of rolling mandrels, 11-Third row of rolling mandrels, 12-Tap roller bearing, 13-Cylindrical roller bearing without outer ring, 14-Skeleton oil seal, 15-Steel ball, 16-Front bearing cap, 17-Rear gear ring, 18-Front gear ring, 20-Angular contact ball bearing, 21-Sticker ring, 22-Second row of rolling mandrels, 23-Sliding sleeve IV or rolling sleeve IV or rolling bearing IV without inner ring. Detailed Implementation

[0022] To make the objectives, features, and advantages of this invention more apparent and understandable, specific embodiments and accompanying drawings will be used to clearly and completely describe the technical solutions protected by this invention. Obviously, the embodiments described below are only a part of the embodiments of this invention, and not all of them. Based on the embodiments in this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] Example 1

[0024] like Figure 1-2As shown, a pure rolling gear reduction transmission device with a three-layer rolling structure includes a front gear ring 18 and a rear gear ring 17 fixedly connected. Both the front gear ring 18 and the rear gear ring 17 are internal gears, and their tooth parameters are identical. During installation, the tooth angle phase difference between the front gear ring 18 and the rear gear ring 17 is half a tooth. A movable gear frame is rotatably connected within the front gear ring 18 and the rear gear ring 17. The movable gear frame includes a front movable gear frame 2 and a rear movable gear frame 3, which are fixedly connected. An eccentric shaft 1 is rotatably connected within the movable gear frame. The eccentric shaft 1 includes... Two eccentric structures are matched with the front gear ring 18 and the rear gear ring 17, with a phase angle difference of 180 degrees between the two eccentric structures. Each eccentric structure is equipped with a cylindrical roller bearing 13 without an outer ring. A shock generator 6 is installed on the outer ring of each of the cylindrical roller bearings 13 without an outer ring. A front movable gear carrier 2 is provided inside the front gear ring 18, and a rear movable gear carrier 3 is provided inside the rear gear ring 17. The front movable gear carrier 2 and the rear movable gear carrier 3 are provided with the same number of rectangular through holes for movable teeth. Each rectangular through hole for movable teeth contains a set of movable teeth. The movable tooth structure includes three rows of movable tooth mechanisms. The first row of movable tooth mechanisms includes a first row of rolling spindles 10, which are arranged... The first row of rolling spindles 10 includes a sliding sleeve I or rolling sleeve I or inner ringless rolling bearing I7 in the middle, and two sliding sleeves II or rolling sleeves II or inner ringless rolling bearings II8 at both ends of the first row of rolling spindles 10. The second row of movable gear mechanism includes a second row of rolling spindles 22. The third row of movable gear mechanism includes a third row of rolling spindles 11 and two sliding sleeves III or rolling sleeves III or inner ringless rolling bearings III9 at both ends of the third row of rolling spindles 11. The outer diameter of the sliding sleeves III or rolling sleeves III or inner ringless rolling bearings III9 is ​​the same as the outer diameter of both ends of the second row of rolling spindles 22 and the outer diameter of the sliding sleeves II or rolling sleeves II or inner ringless rolling bearings II8, and is smaller. The outer diameter of the sliding sleeve I, rolling sleeve I, or rolling bearing I7 without an inner ring is such that the sliding sleeve I, rolling sleeve I, or rolling bearing I7 without an inner ring is in contact with the shock generator 6, the sliding sleeve II, rolling sleeve II, or rolling bearing II8 without an inner ring is in contact with the second row of rolling spindles 22, the two ends of the second row of rolling spindles 22 are in contact with the sliding sleeve III, rolling sleeve III, or rolling bearing III9 without an inner ring, and the middle part of the third row of rolling spindles 11 is in contact with the gear teeth on the front gear ring 18 or the rear gear ring 17; the number of teeth of the front gear ring 18 and the rear gear ring 17 is n, and the number of the live tooth structure is k = (n + 1) / m, where m is the tooth removal coefficient, which can be an integer of 1, 2, or 3.

[0025] Furthermore, the front gear ring 18 and the rear gear ring 17 are positioned by steel balls 15 and stop.

[0026] Furthermore, an intermediate movable gear 4 is provided between the front movable gear 2 and the rear movable gear 3, and the front movable gear 2, the rear movable gear 3 and the intermediate movable gear 4 are fixedly connected. An angular contact ball bearing 20 is provided between the front movable gear 2 and the front gear ring 18, and an angular contact ball bearing 20 is provided between the rear movable gear 3 and the rear gear ring 17.

[0027] Furthermore, the intermediate movable tooth frame 4 is provided with a movable tooth rectangular through hole, and the number of movable tooth rectangular through holes on the front movable tooth frame 2, the rear movable tooth frame 3, and the intermediate movable tooth frame 4 is the same.

[0028] Furthermore, a tapered roller bearing 12 is installed in the rear movable gear frame 3, and a rear bearing cap 5 is fixedly connected to the rear movable gear frame 3. A tapered roller bearing 12 is installed in the front movable gear frame 2, and a front bearing cap 16 is fixedly connected to the front movable gear frame 14. The two tapered roller bearings 12 are respectively installed at both ends of the eccentric shaft 1, and the cylindrical roller bearing 13 without an outer ring is located between the two tapered roller bearings 12.

[0029] Furthermore, a skeleton oil seal 14 is provided between the front live gear 18 and the front gear ring 2.

[0030] Furthermore, the middle part of the third row of rolling spindles 11 directly contacts the gear teeth on the front gear ring 18 or the rear gear ring 17, and a retaining ring 21 is provided at one end of each of the two sliding sleeves III or rolling sleeves III or rolling bearings III9 without inner rings.

[0031] Furthermore, when the eccentric shaft 1 rotates, the eccentric structure drives the cylindrical roller bearing 13 without an outer ring and the shock generator 6 to move around the rotation axis of the eccentric shaft 1. The cylindrical roller bearing 13 without an outer ring and the shock generator 6 are in rolling motion. The shock generator 6 pushes the first row of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. Among them, the sliding sleeve I or rolling sleeve I or the rolling bearing I7 without an inner ring is in rolling motion with the first row of rolling spindles 10. The first row of movable gear mechanism pushes the second row of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. The second row of movable gear mechanism pushes the third row of movable gear mechanism to move radially through the rectangular through hole of the movable gear frame. The second row of rolling spindles 22 is in contact with the sliding sleeve II or rolling sleeve II or the rolling bearing II8 without an inner ring, the sliding sleeve III or rolling sleeve III or the rolling bearing III9 without an inner ring and is in rolling motion. The third row of rolling spindles 11 is in rolling motion with the teeth on the sliding sleeve III or rolling sleeve III or the rolling bearing III9 without an inner ring and the front gear ring 18 and the rear gear ring 17.

[0032] Example 2

[0033] The difference from Embodiment 1 is that a sliding sleeve IV, a rolling sleeve IV, or a rolling bearing IV without an inner ring IV is provided in the middle of the third row of rolling spindles 11, and the third row of rolling spindles 11 contacts the gear teeth on the front gear ring 18 or the rear gear ring 17 through the sliding sleeve IV, the rolling sleeve IV, or the rolling bearing IV without an inner ring IV 23.

[0034] The invention adopts a pure rolling structure for the live gear transmission, which is simple and has lower processing costs. The rolling element in the reducer replaces the sliding element in the original structure, thus reducing the sensitivity to processing accuracy and making it less prone to wear. At the same time, it greatly improves the operating efficiency of the live gear reducer.

[0035] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles, novel features, and inventiveness disclosed herein.

Claims

1. A pure rolling star-wheel reduction gear having a three-layer rolling structure, characterized in that: The application relates to a gear transmission device, which comprises fixedly connected front toothed rings (18) and rear toothed rings (17), the front toothed rings (18) and the rear toothed rings (17) are all internally toothed gears, the tooth parameters of the front toothed rings (18) and the rear toothed rings (17) are the same, when the front toothed rings (18) and the rear toothed rings (17) are installed, the tooth angle phases of the front toothed rings (18) and the rear toothed rings (17) are different by half a tooth, the front toothed rings (18) and the rear toothed rings (17) are rotatably connected with movable tooth racks, the movable tooth racks comprise front movable tooth racks (2) and rear movable tooth racks (3), the front movable tooth racks (2) and the rear movable tooth racks (3) are fixedly connected, eccentric shafts (1) are rotatably connected in the movable tooth racks, the eccentric shafts (1) comprise two eccentric structures matched with the front toothed rings (18) and the rear toothed rings (17) respectively, the phase angles of the two eccentric structures are different by 180 degrees, the two eccentric structures are respectively provided with no-outer-ring cylindrical roller bearings (13), the no-outer-ring cylindrical roller bearings (13) are respectively provided with shock absorbers (6), the front movable tooth racks (2) are arranged in the front toothed rings (18), the rear movable tooth racks (3) are arranged in the rear toothed rings (17), the front movable tooth racks (2) and the rear movable tooth racks (3) are provided with the same number of movable tooth rectangular through holes, a group of movable tooth structures are arranged in each movable tooth rectangular through hole, the movable tooth structures comprise three rows of movable tooth mechanisms, the first row of movable tooth mechanisms comprises first row rolling mandrels (10) and two sliding sleeves II or rolling sleeves II or no-internal-ring rolling bearings II (8) arranged at two ends of the first row rolling mandrels (10), the second row of movable tooth mechanisms comprises second row rolling mandrels (22), the third row of movable tooth mechanisms comprises third row rolling mandrels (11) and two sliding sleeves III or rolling sleeves III or no-internal-ring rolling bearings III (9) arranged at two ends of the third row rolling mandrels (11), the middle part of the first row rolling mandrels (10) is in contact with the shock absorbers (6), the sliding sleeves II or rolling sleeves II or no-internal-ring rolling bearings II (8) are in contact with the second row rolling mandrels (22), the two ends of the second row rolling mandrels (22) are in contact with the sliding sleeves III or rolling sleeves III or no-internal-ring rolling bearings III (9), and the middle part of the third row rolling mandrels (11) is in contact with the teeth on the front toothed rings (18) or the rear toothed rings (17); the tooth numbers of the front toothed rings (18) and the rear toothed rings (17) are n, the number of the movable tooth structures is k=(n+1) / m, wherein m is an extraction tooth coefficient, and the integer can be 1, 2 or 3.

2. The pure rolling star-wheel reduction drive with three-layer rolling structure according to claim 1, characterized in that: The outer diameter of the sliding sleeves III or rolling sleeves III or no-internal-ring rolling bearings III (9) is the same as the outer diameters of the two ends of the second row rolling mandrels (22) and the outer diameter of the sliding sleeves II or rolling sleeves II or no-internal-ring rolling bearings II (8), and is smaller than the outer diameter of the sliding sleeves I or rolling sleeves I or no-internal-ring rolling bearings I (7).

3. Rolling and oscillating tooth reduction gear according to claim 1 or 2, characterized in that When the eccentric shaft (1) rotates, the eccentric structure drives the shock wave (6) to move around the rotation axis of the eccentric shaft (1), the no-outer-ring cylindrical roller bearing (13) and the shock wave (6) are in rolling motion, the shock wave (6) pushes the first row of movable tooth mechanism to move in the radial direction of the movable tooth rack rectangular through hole, the first row of movable tooth mechanism pushes the second row of movable tooth mechanism to move in the radial direction of the movable tooth rack rectangular through hole, the second row of movable tooth mechanism pushes the third row of movable tooth mechanism to move in the radial direction of the movable tooth rack rectangular through hole, the second row of rolling mandrel (22) and the sliding sleeve II or the rolling sleeve II or the no-inner-ring rolling bearing II (8), the sliding sleeve III or the rolling sleeve III or the no-inner-ring rolling bearing III (9) are in rolling motion, the third row of rolling mandrel (11) and the sliding sleeve III or the rolling sleeve III or the no-inner-ring rolling bearing III (9) and the teeth on the front gear ring (18) and the rear gear ring (17) are in rolling motion.

4. The pure rolling star-wheel reduction gear with three-layer rolling structure according to claim 1 or 2, characterized in that: The middle part of the first row of rolling mandrel (10) is directly in contact with the shock wave (6).

5. The pure rolling star-wheel reduction gear with three-layer rolling structure according to claim 1 or 2, characterized in that: The middle part of the first row of rolling mandrel (10) is provided with the sliding sleeve I or the rolling sleeve I or the no-inner-ring rolling bearing I (7), and the sliding sleeve I or the rolling sleeve I or the no-inner-ring rolling bearing I (7) is in contact with the shock wave (6).

6. The pure rolling star-wheel reduction gear with three-layer rolling structure according to claim 1 or 2, characterized in that: The middle part of the third row of rolling mandrel (11) is directly in contact with the teeth on the front gear ring (18) or the rear gear ring (17), and one end of the two sliding sleeves III or the rolling sleeves III or the no-inner-ring rolling bearings III (9) is provided with a retainer (21).

7. The pure rolling star-wheel reduction gear with three-layer rolling structure according to claim 1 or 2, characterized in that: The middle part of the third row of rolling mandrel is provided with the sliding sleeve IV or the rolling sleeve IV or the no-inner-ring rolling bearing IV (23), and the third row of rolling mandrel (11) is in contact with the teeth on the front gear ring (18) or the rear gear ring (17) through the sliding sleeve IV or the rolling sleeve IV or the no-inner-ring rolling bearing IV (23).

8. The pure rolling oscillating tooth speed reducer with three-layer rolling structure according to claim 1 or 2, characterized in that: The intermediate movable tooth rack (4) is arranged between the front movable tooth rack (2) and the rear movable tooth rack (3), the front movable tooth rack (2), the rear movable tooth rack (3) and the intermediate movable tooth rack (4) are fixedly connected, and the angular contact ball bearings (20) are arranged between the front movable tooth rack (2) and the front gear ring (18) and between the rear movable tooth rack (3) and the rear gear ring (17).

9. The pure rolling star-wheel reduction drive with three-layer rolling structure according to claim 8, characterized in that: The intermediate movable tooth rack (4) is provided with movable tooth rectangular through holes, and the number of movable tooth rectangular through holes on the front movable tooth rack (2), the rear movable tooth rack (3) and the intermediate movable tooth rack (4) is the same.

10. The pure rolling oscillating tooth speed reducer with three-layer rolling structure according to claim 1 or 2, characterized in that: The rear movable tooth rack (3) is provided with a conical roller bearing (12), and the rear movable tooth rack (3) is fixedly connected with a rear bearing pressure cover (5); the front movable tooth rack (2) is provided with a conical roller bearing (12), and the front movable tooth rack (2) is fixedly connected with a front bearing pressure cover (16); the two conical roller bearings (12) are respectively arranged at two ends of the eccentric shaft (1), and the no-outer-ring cylindrical roller bearing (13) is located between the two conical roller bearings (12); and the skeleton oil seal (14) is arranged between the front movable tooth rack (2) and the front gear ring (18).

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