Double-layer roller rolling oscillating tooth speed reducer with uniform load structure

Abstract

The invention discloses a double-layer roller rolling oscillating tooth speed reducer with a uniform load structure, which comprises an eccentric shaft piece, an oscillating tooth frame assembly, an inner gear ring assembly, an oscillating tooth assembly, an eccentric shaft bearing piece, an eccentric bearing retainer ring piece, a shock wave device bearing piece, a shock wave device, an inner gear ring end face sealing piece and an inner gear ring bearing piece, the oscillating tooth frame assembly and the inner gear ring assembly are installed above and below the eccentric shaft piece respectively, the oscillating tooth assembly is installed in the inner gear ring assembly, the eccentric shaft bearing piece is installed between the eccentric shaft piece and the inner gear ring assembly, the eccentric bearing check ring piece is installed on the outer side of the eccentric shaft bearing piece, and the shock wave device bearing piece is located on the inner side of the eccentric shaft bearing piece. The shock wave device is installed on the shock wave device bearing piece. The shock wave device uniform load structure and the eccentric shaft bearing elastic washer uniform load structure adopted by the invention can effectively reduce the processing precision requirement on the speed reducer, and can ensure that the two rows of shock wave devices can still obtain uniform load at lower precision, so that the bearing capacity of the speed reducer can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of movable tooth reducers, and in particular to a double-layer roller movable tooth reducer with a load-sharing structure. Background Art

[0002] A movable tooth reducer is a reduction transmission device, usually composed of an input shaft, an output shaft, gears, a gearbox, etc. Its working principle is to reduce the rotation speed of the input shaft through gear transmission, thereby achieving a deceleration effect. Compared with a fixed tooth reducer, a movable tooth reducer is characterized in that its gears can have relative motion during operation and do not need to be fixed on the output shaft. The movable tooth reducer is widely used in the industrial field and is commonly found in various mechanical equipment and transmission systems to adjust the speed and torque of the output shaft. Its advantages include smooth transmission, long life, high efficiency, etc. It is suitable for occasions requiring accurate transmission ratio and high precision. Cycloidal pinwheel reducer, RV reducer and movable tooth reducer all adopt input mechanism composed of double eccentric or triple eccentric circles. Each eccentric circle drives a cycloid wheel or shock wave generator to achieve the balance of eccentric load and multiply the transmission capacity of the reducer. However, the two ends of the eccentric shaft are generally supported on two bearings at the same time. In this way, the load on multiple rows of shock waves or cycloid wheels together with the support reaction force constitute an over-static system. The actual force size of each eccentric circle cross section is closely related to the rigidity of each part of the system and its processing accuracy.

[0003] However, the existing movable tooth reducer has the following problems during use: when the processing errors of the respective size chains formed by multiple rows of shock waves or cycloidal wheels are the same, the forces they bear are the same. When there are different processing errors, the forces on multiple shock waves or white-line gears are different. The higher the system rigidity and the greater the difference in processing errors, the greater the difference in loads borne by multiple rows of shock waves or cycloidal wheels. That is, when the processing accuracy of the reducer is not high enough, multiple rows of gears will not work at the same time, so the actual working life of the reducer will be much lower than its design life. The conventional method is to ensure the uniformity of the loads borne by two or more rows of shock waves or cycloidal wheels by improving the processing accuracy of each part of the reducer, but this solution will significantly increase the manufacturing difficulty and cost of the reducer. To this end, it is necessary to design corresponding technical solutions to solve the existing technical problems. Summary of the invention

[0004] The object of the present invention is to provide a double-layer roller movable tooth reducer with a load-balancing structure, which solves the problem that the forces borne by multiple rows of shock waves or cycloidal wheels are the same only when the processing errors of their respective size chains are the same. When there are different processing errors, the forces borne by multiple shock waves or white-line gears are different, and the higher the system rigidity and the greater the difference in processing errors, the greater the difference in loads borne by multiple rows of shock waves or cycloidal wheels. That is, when the processing accuracy of the reducer is not high enough, multiple rows of gears will not work at the same time, so the actual working life of the reducer will be much lower than its design life. The conventional method is to ensure the uniformity of the loads borne by two or more rows of shock waves or cycloidal wheels by improving the processing accuracy of each part of the reducer, but this solution will significantly increase the manufacturing difficulty and cost of the reducer, which is a technical problem.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-layer roller movable tooth reducer with a load-balancing structure, comprising an eccentric shaft, a movable tooth rack assembly, an inner gear ring assembly, a movable tooth assembly, an eccentric shaft bearing assembly, an eccentric bearing retaining ring assembly, a shock wave device, an inner gear ring end face seal and an inner gear ring bearing assembly, wherein the movable tooth rack assembly and the inner gear ring assembly are respectively installed at the upper and lower parts of the eccentric shaft, the movable tooth assembly is installed in the inner gear ring assembly, the eccentric shaft bearing assembly is installed between the eccentric shaft and the inner gear ring assembly, the eccentric bearing retaining ring assembly is installed on the outer side of the eccentric shaft bearing assembly, the shock wave device is installed on the shock wave device bearing assembly, the inner gear ring end face seal is installed on the inner gear ring assembly, and the inner gear ring bearing assembly is installed between the eccentric shaft and the movable tooth rack assembly;

[0006] The movable tooth frame assembly comprises a left movable tooth frame member, a middle movable tooth frame member, a right movable tooth frame member, a pin member 1 and a screw member 1, the left movable tooth frame member and the right movable tooth frame member are symmetrically distributed on the left and right, the middle movable tooth frame member is located between the left movable tooth frame member and the right movable tooth frame member, and the left movable tooth frame member, the middle movable tooth frame member and the right movable tooth frame member are connected by a pin member 1 and a screw member 1;

[0007] The inner gear ring assembly comprises a left inner gear ring, a right inner gear ring member, a positioning kit, a second pin member and a second screw member. The left inner gear ring and the right inner gear ring member are symmetrically distributed on the left and right sides and are positioned and installed by the positioning kit. The second pin member and the second screw member are used to connect the left inner gear ring, the right inner gear ring member and the positioning kit.

[0008] The movable tooth assembly includes an upper spindle, a lower spindle, a needle roller assembly and a needle roller outer sleeve assembly. The upper spindle and the lower spindle are distributed up and down. The needle roller assemblies are divided into four groups and are evenly distributed at the corners of the upper spindle. The needle roller outer sleeve assembly is divided into four groups and is respectively installed on the four groups of needle roller assemblies.

[0009] As a preferred embodiment of the present invention, the eccentric shaft bearing member is eccentrically arranged and is sealed on the outside by an eccentric bearing retaining ring member.

[0010] As a preferred embodiment of the present invention, the eccentric shaft bearing member is provided with an eccentric shaft bearing washer member and an eccentric shaft bearing elastic washer, the eccentric shaft bearing elastic washer is embedded in the end of the eccentric shaft bearing member, and the eccentric shaft bearing washer member is arranged below the eccentric shaft bearing elastic washer.

[0011] As a preferred embodiment of the present invention, the eccentric shaft bearing washer and the eccentric shaft bearing elastic washer are both made of elastic material, and the thickness of the eccentric shaft bearing washer is greater than the thickness of the eccentric shaft bearing elastic washer.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The shock wave balancing structure and the eccentric shaft bearing elastic washer balancing structure adopted in the present invention can effectively reduce the processing accuracy requirements for the reducer, and can ensure that the two rows of shock waves can still obtain uniform load under lower accuracy, thereby improving the load-bearing capacity of the reducer. By balancing the load, the maximum working load is reduced, and the working life of the reducer is significantly extended. It is used in cycloid pinwheel reducers and RV reducers to solve the load balancing problem. In addition, it can be used in the planetary gears of planetary reducers to increase the number of planetary gears and reduce accuracy requirements, and significantly improve the load-bearing capacity of planetary gear reducers. It has extremely broad application prospects.

[0014] 2. The present invention is a method for equalizing the load by providing a deformation structure on the eccentric shaft support bearing or the shock wave of the movable tooth reducer. By providing an elastic support structure at the bearing joint surfaces at both ends of the eccentric shaft or in the shock wave, the shock wave or the eccentric shaft support bearing under the rated load of the reducer will undergo a certain deformation. The greater the difference between the deformation and the processing error, the more uniform the load, thereby ensuring the normal operation of the movable tooth reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a movable-tooth reducer with a deformable shock wave generator according to the present invention;

[0016] Figure 2 This is a structural diagram of a movable tooth reducer with a deformable bearing support surface according to the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the movable tooth reducer of the present invention;

[0018] Figure 4 The structure diagram of five kinds of deformable shock wave devices of the present invention;

[0019] Figure 5This is a structural diagram of the movable tooth assembly of the present invention;

[0020] Figure 6 This is a structural diagram of the elastic support pad of the eccentric shaft bearing member described in the present invention.

[0021] In the figure: 1, eccentric shaft component; 2, movable tooth frame assembly; 3, inner gear ring assembly; 4, movable tooth assembly; 5, eccentric shaft bearing component; 6, eccentric bearing retaining ring component; 7, shock wave device bearing component; 8, shock wave device; 9, inner gear ring end face seal component; 10, inner gear ring bearing component; 11, eccentric shaft bearing gasket component; 12, eccentric shaft bearing elastic gasket; 201, left movable tooth frame component; 202, middle movable tooth frame component; 203, pin component one; 204, screw component one; 205, right movable tooth frame component; 301, right inner gear ring component; 302, pin component two; 303, positioning kit; 304, screw component two; 305, left inner gear ring; 401, lower spindle component; 402, upper spindle component; 403, needle roller assembly; 404, needle roller outer kit. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-6 The present invention provides a technical solution: a double-layer roller movable tooth reducer with a load-balanced structure, comprising an eccentric shaft 1, a movable tooth frame assembly 2, an inner gear ring assembly 3, a movable tooth assembly 4, an eccentric shaft bearing 5, an eccentric bearing retaining ring 6, a shock wave device bearing 7, a shock wave device 8, an inner gear ring end face seal 9 and an inner gear ring bearing 10, wherein the movable tooth frame assembly 2 and the inner gear ring assembly 3 are respectively mounted on the upper and lower sides of the eccentric shaft 1, the movable tooth assembly 4 is mounted in the inner gear ring assembly 3, the eccentric shaft bearing 5 is mounted between the eccentric shaft 1 and the inner gear ring assembly 3, the eccentric bearing retaining ring 6 is mounted on the outer side of the eccentric shaft bearing 5, the shock wave device bearing 7 is located on the inner side of the eccentric shaft bearing 5, the shock wave device 8 is mounted on the shock wave device bearing 7, the inner gear ring end face seal 9 is mounted on the inner gear ring assembly 3, and the inner gear ring bearing 10 is mounted between the eccentric shaft 1 and the movable tooth frame assembly 2;

[0024] The movable tooth frame assembly 2 includes a left movable tooth frame member 201, a middle movable tooth frame member 202, a right movable tooth frame member 205, a pin member 203 and a screw member 204. The left movable tooth frame member 201 and the right movable tooth frame member 205 are symmetrically distributed. The middle movable tooth frame member 202 is located between the left movable tooth frame member 201 and the right movable tooth frame member 205. The left movable tooth frame member 201, the middle movable tooth frame member 202 and the right movable tooth frame member 205 are connected by a pin member 203 and a screw member 204.

[0025] The inner gear ring assembly 3 includes a left inner gear ring 305, a right inner gear ring member 301, a positioning kit 303, a second pin member 302 and a second screw member 304. The left inner gear ring 305 and the right inner gear ring member 301 are symmetrically distributed on the left and right sides and are positioned and installed by the positioning kit 303. The second pin member 302 and the second screw member 304 are used to connect the left inner gear ring 305, the right inner gear ring member 301 and the positioning kit 303.

[0026] The movable tooth assembly 4 includes an upper spindle component 402, a lower spindle component 401, a needle roller assembly 403 and a needle roller outer assembly component 404. The upper spindle component 402 and the lower spindle component 401 are distributed up and down. The needle roller assembly 403 is divided into four groups and is evenly distributed at the corners of the upper spindle component 402. The needle roller outer assembly component 404 is divided into four groups and is respectively installed on the four groups of needle roller assemblies 403.

[0027] Further improvement, such as Figure 6 As shown, the eccentric shaft bearing member 5 is eccentrically arranged and is sealedly installed on the outside through an eccentric bearing retaining ring member 6 .

[0028] Figure 4 There are five types of deformable shock wave structures. In the figure, (a), (b), (c), (d), and (e) are respectively a Z-type shock wave structure, a two-shaped shock wave structure, a straight-line shock wave structure, a C-shaped shock wave structure, and an O-shaped shock wave structure. The deformation of the shock wave under the rated load can be controlled by controlling the thickness H. The design of the specific deformation amount of the shock wave under the rated load needs to be determined through calculation by comprehensively considering factors such as the maximum error produced by the two shock waves under a certain manufacturing accuracy and the working life of the reducer.

[0029] Further improvement, such as Figure 2 and 6 As shown, the eccentric shaft bearing member 5 is provided with an eccentric shaft bearing washer member 11 and an eccentric shaft bearing elastic washer 12. The eccentric shaft bearing elastic washer 12 is sleeved on the end of the eccentric shaft bearing member 5. The eccentric shaft bearing washer member 11 is provided below the eccentric shaft bearing elastic washer 12. Figure 2 The shock wave deformable movable tooth reducer shown includes Figure 1The reducer shown in the figure has a basic structure and also has an eccentric shaft bearing elastic washer 12 and an eccentric shaft bearing washer 11. The shock wave generator 8 in this scheme does not need to have a deformable structure, and its deformable structure can also be Figure 4 One of the various structures shown, a reasonably designed bearing elastic support pad can achieve a load-balancing effect similar to that of a deformable shock wave generator. In addition, the load-balancing elastic structure can be installed in the area between the inner hole of the movable gear rack and the eccentric shaft bearing, and can also replace the inner ring of the shock wave generator bearing to achieve a load-balancing effect.

[0030] Specifically, the eccentric shaft bearing washer 11 and the eccentric shaft bearing elastic washer 12 are both made of elastic material, and the thickness of the eccentric shaft bearing washer 11 is greater than the thickness of the eccentric shaft bearing elastic washer 12 .

[0031] The present invention is a method for equalizing the load by setting a deformation structure on the eccentric shaft support bearing or the shock wave of a movable tooth reducer. By setting an elastic support structure at the bearing joint surfaces at both ends of the eccentric shaft or in the shock wave, the shock wave or the eccentric shaft support bearing under the rated load of the reducer undergoes a certain deformation. The greater the difference between the deformation and the processing error, the more uniform the load, thereby ensuring the normal operation of the movable tooth reducer. The adopted shock wave load-balancing structure and the eccentric shaft bearing elastic washer load-balancing structure can effectively reduce the processing accuracy requirements for the reducer, and can ensure that the two rows of shock waves can still obtain uniform loads under lower accuracy, thereby improving the load-bearing capacity of the reducer. By load-balancing, the maximum working load is reduced, thereby achieving the purpose of significantly extending the working life of the reducer. The method is used in cycloidal pinwheel reducers and RV reducers to solve the load-balancing problem. In addition, it can be used in planetary gears of planetary reducers to increase the number of planetary gears and reduce accuracy requirements, and significantly improve the load-bearing capacity of planetary gear reducers. It has extremely broad application prospects.

[0032] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0034] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A double-layer roller movable tooth reducer with a load-sharing structure, characterized in that: The invention comprises an eccentric shaft component (1), a movable gear frame component (2), an inner gear ring component (3), a movable gear component (4), an eccentric shaft bearing component (5), an eccentric bearing retaining ring component (6), a shock wave device bearing component (7), a shock wave device (8), an inner gear ring end face sealing component (9) and an inner gear ring bearing component (10), wherein the movable gear frame component (2) and the inner gear ring component (3) are respectively mounted on the upper and lower sides of the eccentric shaft component (1), the movable gear component (4) is mounted in the inner gear ring component (3), and the eccentric shaft bearing component (5) is provided with an eccentric bearing retaining ring component (6), a shock wave device bearing component (7), a shock wave device (8), an inner gear ring end face sealing component (9) and an inner gear ring bearing component (10). The component (5) is installed between the eccentric shaft component (1) and the inner gear ring component (3), the eccentric bearing retaining ring component (6) is installed on the outer side of the eccentric shaft bearing component (5), the shock wave device bearing component (7) is located on the inner side of the eccentric shaft bearing component (5), the shock wave device (8) is installed on the shock wave device bearing component (7), the inner gear ring end face seal component (9) is installed on the inner gear ring component (3), and the inner gear ring bearing component (10) is installed between the eccentric shaft component (1) and the movable gear rack component (2); The movable tooth frame assembly (2) comprises a left movable tooth frame member (201), a middle movable tooth frame member (202), a right movable tooth frame member (205), a pin member (203) and a screw member (204); the left movable tooth frame member (201) and the right movable tooth frame member (205) are symmetrically distributed on the left and right sides; the middle movable tooth frame member (202) is located between the left movable tooth frame member (201) and the right movable tooth frame member (205); the left movable tooth frame member (201), the middle movable tooth frame member (202) and the right movable tooth frame member (205) are connected via a pin member (203) and a screw member (204); The inner gear ring assembly (3) comprises a left inner gear ring (305), a right inner gear ring member (301), a positioning kit (303), a second pin member (302) and a second screw member (304); the left inner gear ring (305) and the right inner gear ring member (301) are symmetrically distributed on the left and right sides and are positioned and installed by the positioning kit (303); the second pin member (302) and the second screw member (304) are used to connect the left inner gear ring (305), the right inner gear ring member (301) and the positioning kit (303); The movable tooth assembly (4) comprises an upper spindle component (402), a lower spindle component (401), a needle roller assembly (403) and a needle roller outer assembly component (404); the upper spindle component (402) and the lower spindle component (401) are distributed up and down; the needle roller assembly (403) is divided into four groups and is evenly distributed at the corners of the upper spindle component (402); the needle roller outer assembly component (404) is divided into four groups and is respectively installed on the four groups of needle roller assemblies (403).

2. The double-layer roller movable tooth reducer with load-sharing structure according to claim 1 is characterized in that: The eccentric shaft bearing component (5) is arranged in an eccentric shape and is sealedly installed on the outer side via an eccentric bearing retaining ring component (6).

3. The double-layer roller movable tooth reducer with load-sharing structure according to claim 1 is characterized in that: The eccentric shaft bearing component (5) is provided with an eccentric shaft bearing washer component (11) and an eccentric shaft bearing elastic washer (12); the eccentric shaft bearing elastic washer (12) is sleeved on the end of the eccentric shaft bearing component (5); and the eccentric shaft bearing washer component (11) is arranged below the eccentric shaft bearing elastic washer (12).

4. The double-layer roller movable tooth reducer with load-sharing structure according to claim 1 is characterized in that: The eccentric shaft bearing washer (11) and the eccentric shaft bearing elastic washer (12) are both made of elastic material, and the thickness of the eccentric shaft bearing washer (11) is greater than the thickness of the eccentric shaft bearing elastic washer (12).

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