Weight-reduction oscillating tooth speed reducer and motor comprising same

Abstract

The utility model relates to the technical field of speed reducers, in particular to a weight-reduction oscillating tooth speed reducer and a motor comprising the speed reducer, which comprise a shell which is of a split structure and comprises an outer shell and an inner gear ring, and the inner gear ring is installed on the outer shell in an interference fit mode; the planetary speed reduction assembly is arranged in the inner cavity of the shell, is in differential engagement with the shell and is used for reducing the rotating speed input by the motor; one end of the crankshaft is synchronously and rotationally connected with the output part of the motor, and the other end is connected with the planetary reduction assembly for transmitting the rotating speed of the motor to the planetary reduction assembly; and the output shaft is installed relative to the shell in a rotating mode and used for transmitting and outputting the rotating speed output by the planetary speed reduction assembly, and the technical problems that in the prior art, a speed reducer is complex in structure, unreasonable in design, large in weight, limited in application range, low in transmission efficiency and large in transmission noise are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a weight-reduced oscillating tooth speed reducer and a motor including the speed reducer. Background Art

[0002] The descriptions in this section only provide background information related to the present disclosure and do not constitute prior art.

[0003] The speed reducer plays a role in matching the rotational speed and transmitting the torque between the prime mover and the working machine or the actuator, and is widely used in modern machinery. A common speed reducer, such as the new patent with the publication number CN205605767U and the patent name of a solar cell string typesetting machine for preventing air pipeline entanglement and the roller oscillating tooth speed reducer used therein, discloses including a box body, an input shaft, an output shaft and a rear end cover. The box body is fixedly connected through its cylinder body and the rear end cover to form a cavity for accommodating the excitator. The excitator is connected with cylindrical rollers through excitator bearings. The cylindrical rollers are arranged in the roller grooves on the cage, located between the excitator bearings and the envelope surface. A gas passage II is arranged on the output shaft. An opening I of the gas passage II is arranged on the side surface of the output, and its opening II is arranged on the end surface connected with the suction cup. A shaft sleeve is arranged on the output shaft, and the shaft sleeve is rotatably connected with the output shaft. The above technology still has many problems, such as: ① The whole speed reducer including the box body is relatively heavy, and a pin sleeve is arranged between the pin shaft and the gear disc of the conventional speed reducer, resulting in that the speed reducer cannot be widely applied to industries with high weight requirements; ② The input shaft of the conventional speed reducer and the output shaft of the motor are connected through a coupling or the like, which not only increases the overall weight of the equipment, but also the connection part is generally connected by a key or other means, indirectly affecting the transmission efficiency of the speed reducer, and also increasing the transmission impact force and transmission noise invisibly. Content of the Utility Model

[0004] The purpose of the utility model is to provide a weight-reduced oscillating tooth speed reducer and a motor including the speed reducer, which are used to solve the technical problems of large weight caused by complex structure and unreasonable design in the existing speed reducer, resulting in limited application range, low transmission efficiency and large transmission noise.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A weight-reduced oscillating tooth speed reducer includes:

[0007] A housing, which is set as a split structure and includes an outer shell and an internal gear ring. The internal gear ring is installed on the outer shell by interference fit;

[0008] A planetary reduction assembly, which is arranged in the inner cavity of the housing and is installed in differential meshing with the housing, and is used for reducing the speed of the rotation speed input by the motor;

[0009] The crankshaft is synchronously and rotationally connected to the output part of the motor at one end, and is connected to the planetary reduction assembly at the other end for transmitting the rotational speed of the motor to the planetary reduction assembly.

[0010] The output shaft is rotatably installed relative to the housing and is used to transmit the rotational speed output by the planetary reduction assembly.

[0011] Furthermore, it also includes a connecting shaft which is rotatably installed relative to the housing. Both the connecting shaft and the output shaft are made of aluminum alloy material, the outer shell is made of aluminum alloy material, and the internal gear ring is made of alloy steel material.

[0012] Furthermore, the connecting shaft and the output shaft are relatively fixedly connected by a plurality of pin shafts.

[0013] Furthermore, the planetary reduction assembly includes a first gear disc and a second gear disc. The first gear disc and the second gear disc are respectively rotatably installed relative to the first eccentric projection and the second eccentric projection provided on the crankshaft. The first gear disc and the second gear disc are respectively meshed with the long pin teeth provided on the internal gear ring of the housing through needle rollers. The pin shaft passes through the transmission holes provided on the first gear disc and the second gear disc.

[0014] Furthermore, one end of the pin shaft is installed by interference fit with the output shaft, and the other end is installed by interference fit with the connecting shaft and is connected to the connecting shaft by a screw.

[0015] Furthermore, the pin shaft is arranged in a structure with a thick middle and thin ends. The middle is a thick shaft, and the two ends are thin shafts. The diameter of the thick shaft is D, the diameter of the thin shaft is d, the length of the thick shaft is L, and the length of the thin shaft is m. The relationship between the various dimensions is: d < D < 1.2d, m < L < 1.8m, 2D < L < 3D.

[0016] Furthermore, the diameter of the long pin teeth is H, and the diameter of the short pin teeth is h, h < H < 1.2h.

[0017] Furthermore, the output shaft and the connecting shaft are respectively rotatably installed relative to the crankshaft through deep groove ball bearings. The first gear disc and the second gear disc are respectively rotatably installed relative to the crankshaft through needle roller bearings. The output shaft and the connecting shaft are respectively rotatably installed relative to the housing through angular contact ball bearings.

[0018] Furthermore, a spacer ring is arranged between the deep groove ball bearing between the output shaft and the crankshaft and the first eccentric projection and the needle roller bearing. A spacer ring is arranged between the deep groove ball bearing between the connecting shaft and the crankshaft and the second eccentric projection and the needle roller bearing. A retaining ring is arranged between the first gear disc and the second gear disc. Gaskets are arranged between the housing and the two angular contact ball bearings respectively.

[0019] A motor includes the above-mentioned weight-reducing oscillating tooth speed reducer, and the output part of the motor is synchronously and rotationally connected to the speed reducer through a crankshaft.

[0020] Compared with the prior art, the technical solution of the present utility model has the following beneficial effects:

[0021] (1). By setting the housing as an outer shell and an internal gear ring connected by interference fit, the present utility model can select the corresponding materials for the outer shell and the internal gear ring, thereby reducing the overall weight of the speed reducer, and at the same time ensuring the performance of the internal gear ring with higher requirements for strength and wear resistance.

[0022] (2). By setting the speed reducer and the motor to share a crankshaft, that is, the crankshaft simultaneously takes into account the power output function of the motor and the power input function of the speed reducer, the present utility model not only simplifies the structure and assembly process of the equipment, but also reduces the power transmission loss and transmission impact force, and improves the power transmission efficiency;

[0023] (3). By setting the specific structure and size of the pin shaft, the present utility model not only simplifies the installation structure, but also ensures the overall stability of the structure and the power transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front three-dimensional structural schematic diagram of the speed reducer of the present utility model;

[0025] Figure 2 is a rear three-dimensional structural schematic diagram of the speed reducer of the present utility model;

[0026] Figure 3 is an exploded structural schematic diagram of the speed reducer of the present utility model;

[0027] Figure 4 is a sectional structural schematic diagram of the speed reducer of the present utility model along the central axis;

[0028] Figure 5 is a front view of the motor of the present utility model;

[0029] Figure 6 is a three-dimensional structural schematic diagram of the motor of the present utility model;

[0030] Figure 7 is Figure 5 a sectional structural schematic diagram at A-A in

[0031] Figure 8 a sectional view of the crankshaft.

[0032] In the figure: 1. Output shaft; 2. Angular contact ball bearing; 3. Deep groove ball bearing; 4. Pin shaft; 5. Gasket; 6. Housing; 61. Outer shell; 62. Internal gear ring; 7. Spacer ring; 8. Needle roller bearing; 9. Long needle teeth; 10. Short needle teeth; 11. First tooth disc; 12. Retaining ring; 13. Second tooth disc; 14. Connecting shaft; 15. Screw; 16. Crankshaft; 161. First eccentric projection; 162. Second eccentric projection; 17. Motor. Detailed implementation manners

[0033] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] The accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent;

[0035] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0036] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0037] In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be construed as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0038] In addition, in the description of this application, unless otherwise specified, "a plurality of" means two or more. "And / or" describes the relationship between associated objects and indicates that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, both A and B exist simultaneously, and B exists alone. The character " / " generally indicates an "or" relationship between the associated objects before and after. The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments.

[0039] To address the limitations of the prior art, this embodiment provides a technical solution. The following further explains the technical solution of the present utility model in conjunction with the accompanying drawings and embodiments.

[0040] The present utility model mainly makes technical improvements to address the problems of large weight and low transmission efficiency existing in the oscillating tooth speed reducer in the prior art. The specific solution is as follows:

[0041] See the attached Figures 1-4, a weight-reducing live tooth speed reducer, comprising: a housing 6, which is set as a split structure and includes an outer housing 61 and an internal gear ring 62. The internal gear ring 62 is installed on the outer housing 61 by interference fit. It can be understood that the outer housing 61 is set as an annular structure, and an annular boss is provided in the middle of its inner ring, mainly for axially positioning two angular contact ball bearings 2. The outer peripheral surface of the internal gear ring 62 is installed on the annular boss of the outer housing 61 by interference fit, and several arc-shaped grooves arranged in a circumferential manner are provided on the inner ring. The main purpose here is to facilitate the use of different materials for the outer housing 61 and the internal gear ring 62 to achieve the purpose of both reducing weight and maintaining strength and wear resistance; a planetary reduction assembly, which is arranged in the inner cavity of the housing 6 and is installed in differential meshing with the housing 6, for reducing the speed of the rotation input by the motor 17. The principle here is a known public technology. For details, reference can be made to the invention patent with the publication number CN104864036B and the name of an improved swing plate speed reducer applied by this company; a crankshaft 16, one end of which is synchronously rotationally connected to the output part of the motor 17, and the other end is connected to the planetary reduction assembly for transmitting the rotation speed of the motor 17 to the planetary reduction assembly. First eccentric protrusions 161 and second eccentric protrusions 162 are provided on the crankshaft 16. The eccentric axes of the first eccentric protrusion 161 and the second eccentric protrusion 162 are symmetrically arranged with respect to the axis of the crankshaft 16. The main purpose is to generate differential swings with the first tooth disc 11 and the second tooth disc 13 when the crankshaft 16 rotates; an output shaft 1, which is rotationally installed relative to the housing 6 and is used to transmit the rotation speed output by the planetary reduction assembly. Here, the rotational installation is achieved through angular contact ball bearings 2. It also includes a connecting shaft 14, which is rotationally installed relative to the housing 6. Here, the rotational installation is achieved through angular contact ball bearings 2. Both the connecting shaft 14 and the output shaft 1 are made of aluminum alloy material, the outer housing 61 is made of aluminum alloy material, and the internal gear ring 62 is made of alloy steel material. The aluminum alloy material is lighter in weight than the alloy steel material. Both the connecting shaft 14 and the output shaft 1 are respectively rotationally installed relative to the crankshaft 16 through deep groove ball bearings 3.

[0042] Specifically, the connecting shaft 14 and the output shaft 1 are relatively fixedly connected through a plurality of pin shafts 4. Here, the connecting shaft 14 and the output shaft 1 are set to cooperate, which is beneficial to improving the overall operation stability of the speed reducer. Specifically, one end of the pin shaft 4 is installed in the output shaft 1 by interference insertion, and the other end is installed in the connecting shaft 14 by interference insertion and is connected to the connecting shaft 14 through a countersunk head screw 15. Specifically, the pin shaft 4 is set as a structure with a thick middle and thin ends. The middle is a thick shaft, and the two ends are thin shafts. One thin shaft is connected to the output shaft 1, and the other thin shaft is connected to the connecting shaft 14. The diameter of the thick shaft is D, the diameter of the thin shaft is d, the length of the thick shaft is L, and the length of the thin shaft is m. The relationship between the various dimensions is: d < D < 1.2d, m < L < 1.8m, 2D < L < 3D. Here, the dimension limitation of the pin shaft 4 not only simplifies the installation structure but also ensures the overall stability of the structure and the power transmission efficiency.

[0043] Specifically, the planetary speed reduction assembly includes a first gear disk 11 and a second gear disk 13. The first gear disk 11 and the second gear disk 13 are respectively rotatably mounted relative to a first eccentric projection 161 and a second eccentric projection 162 provided on the crankshaft 16. Here, the rotational mounting is achieved through a needle bearing 8. A plurality of arc-shaped grooves are provided on the outer ring of the first gear disk 11, and short pin teeth 10 are placed and mounted in the arc-shaped grooves. A plurality of arc-shaped grooves are provided on the outer ring of the second gear disk 13, and short pin teeth 10 are placed and mounted in the arc-shaped grooves. The short pin teeth 10 of the first gear disk 11 and the second gear disk 13 are both meshed and contact-mounted with the long pin teeth 9 of the internal gear ring 62 in the housing 6. Refer to the appendix here Figure 8 , the first gear disk 11 and the second gear disk 13 are respectively meshed with the long pin teeth 9 provided on the internal gear ring 62 of the housing 6 through needles. The pin shaft 4 passes through the transmission holes provided on the first gear disk 11 and the second gear disk 13. Here, the diameter of the transmission hole is greater than the maximum diameter of the pin shaft 4. The diameter of the long pin teeth 9 is H, and the diameter of the short pin teeth 10 is h, where h < H < 1.2h. By defining the dimensional relationship between the long pin teeth 9 and the short pin teeth 10, both the transmission efficiency and the transmission stability can be ensured.

[0044] Specifically, a spacer ring 7 is provided between the deep groove ball bearing 3 between the output shaft 1 and the crankshaft 16 and the first eccentric projection 161 and the needle bearing 8. A spacer ring 7 is provided between the deep groove ball bearing 3 between the connecting shaft 14 and the crankshaft 16 and the second eccentric projection 162 and the needle bearing 8. A retaining ring 12 is provided between the first gear disk 11 and the second gear disk 13. Gaskets 5 are provided between the housing 6 and the two angular contact ball bearings 2 respectively. By providing the spacer ring 7, the retaining ring 12 and the gaskets 5, the inner ring or the outer ring of the bearing is blocked, improving the wear resistance of the bearing and reducing the operating noise.

[0045] Refer to the appendix Figures 5-7 , a motor 17 includes the above-mentioned weight-reduced moving tooth speed reducer. The output part of the motor 17 is synchronously rotationally connected to the speed reducer through the crankshaft 16. By providing that the speed reducer and the motor 17 share a crankshaft 16, that is, the crankshaft 16 simultaneously takes into account the power output function of the motor 17 and the power input function of the speed reducer, not only the structure and assembly process of the equipment are simplified, but also the power transmission loss and the transmission impact force are reduced, and the power transmission efficiency is improved.

[0046] When the speed reducer of the present utility model works, the motor 17 directly outputs power through the crankshaft 16. After the speed is reduced by the planetary speed reduction assembly, the output shaft 1 outputs the speed reduced by the planetary speed reduction assembly. By setting the housing 6 as a split structure and defining the materials of the housing 6, the output shaft 1 and the connecting shaft 14, the overall weight of the equipment is greatly reduced.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0048] The foregoing is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A weight-reducing movable-tooth reducer, characterized in that: include: The housing (6) is configured as a split structure, comprising an outer shell (61) and an inner gear ring (62), wherein the inner gear ring (62) is installed on the outer shell (61) by interference fit; A planetary reduction assembly, disposed in the inner cavity of the housing (6) and mounted in differential meshing engagement with the housing (6), for reducing the speed of the input rotation speed of the motor (17); A crankshaft (16), one end of which is synchronously connected to the output portion of the motor (17) for rotation, and the other end of which is connected to the planetary reduction assembly for transmitting the rotation speed of the motor (17) to the planetary reduction assembly; The output shaft (1) is mounted to rotate relative to the housing (6) and is used to transmit the rotation speed output by the output planetary reduction assembly.

2. A weight-reducing movable-tooth reducer according to claim 1, characterized in that: It also includes a connecting shaft (14) which is rotatably mounted relative to the housing (6); the connecting shaft (14) and the output shaft (1) are both made of aluminum alloy, the housing (61) is made of aluminum alloy, and the inner gear ring (62) is made of alloy steel.

3. A weight-reducing movable-tooth reducer according to claim 2, characterized in that: The connecting shaft (14) and the output shaft (1) are relatively fixedly connected via a plurality of pins (4).

4. A weight-reducing movable-tooth reducer according to claim 3, characterized in that: The planetary reduction assembly comprises a first toothed disc (11) and a second toothed disc (13), wherein the first toothed disc (11) and the second toothed disc (13) are respectively rotatably mounted with a first eccentric protrusion (161) and a second eccentric protrusion (162) provided on a crankshaft (16), wherein the first toothed disc (11) and the second toothed disc (13) are respectively meshed with long needle teeth (9) provided on an inner gear ring (62) of a housing (6) through needle rollers, and the pin shaft (4) passes through transmission holes provided on the first toothed disc (11) and the second toothed disc (13).

5. A weight-reducing movable-tooth reducer according to claim 4, characterized in that: One end of the pin shaft (4) is installed with the output shaft (1) by interference fit, and the other end is installed with the connecting shaft (14) by interference fit and connected to the connecting shaft (14).

6. A weight-reducing movable-tooth reducer according to claim 5, characterized in that: The pin shaft (4) is configured as a structure with a thick middle and thin ends, wherein the middle is a thick shaft and the two ends are thin shafts, wherein the diameter of the thick shaft is D, the diameter of the thin shaft is d, the length of the thick shaft is L, the length of the thin shaft is m, and the relationship between the dimensions is: d<D<1.2d, m<L<1.8m, 2D<L<3D.

7. A weight-reducing movable-tooth reducer according to claim 6, characterized in that: The diameter of the long needle teeth (9) is H, the diameter of the short needle teeth (10) is h, and h<H<1.2h.

8. A weight-reducing movable-tooth reducer according to claim 7, characterized in that: The output shaft (1) and the connecting shaft (14) are respectively mounted to rotate relative to the crankshaft (16) via deep groove ball bearings (3); the first toothed disc (11) and the second toothed disc (13) are respectively mounted to rotate relative to the crankshaft (16) via needle bearings (8); and the output shaft (1) and the connecting shaft (14) are respectively mounted to rotate relative to the housing (6) via angular contact ball bearings (2).

9. A weight-reducing movable-tooth reducer according to claim 8, characterized in that: A spacer ring (7) is arranged between the deep groove ball bearing (3) between the output shaft (1) and the crankshaft (16), the first eccentric protrusion (161) and the needle bearing (8); a spacer ring (7) is arranged between the deep groove ball bearing (3) between the connecting shaft (14) and the crankshaft (16), the second eccentric protrusion (162) and the needle bearing (8); a retaining ring (12) is arranged between the first toothed disc (11) and the second toothed disc (13); and gaskets (5) are arranged between the housing (6) and the two angular contact ball bearings (2).

10. A motor comprising the weight-reducing movable-tooth reducer according to any one of claims 1 to 9, characterized in that: The output portion of the motor (17) is connected to the reducer via a crankshaft (16) for synchronous rotation.

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