Reducer power transmission mechanism and reducer

Abstract

The present invention relates to a speed reducer power transmission mechanism and a speed reducer. The speed reducer power transmission mechanism includes a mounting plate, a first bearing, a rotating assembly, and a driving member. The mounting plate includes a mounting plate body and a boss connected to the mounting plate body. The mounting plate body includes a first end face and a second end face opposite to the first end face. The boss extends from the second end face in a direction away from the first end face. The mounting plate is provided with a first mounting hole and a second mounting hole. The first mounting hole extends from the mounting plate body to the boss, and the second mounting hole is provided on the mounting plate body. The first bearing is installed in the first mounting hole. The rotating assembly is connected to the first end face side of the mounting plate through the first bearing, and the driving member is drivingly connected to the second end face side of the mounting plate through the second mounting hole. The speed reducer includes the speed reducer power transmission mechanism. The speed reducer power transmission mechanism of the present invention is lighter in weight.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and particularly to a power transmission mechanism and a speed reducer of a speed reducer. Background Art

[0002] The RV speed reducer is a new type of cycloidal pinwheel planetary transmission mechanism mainly composed of a first-stage gear transmission and a second-stage cycloidal drive. When the RV speed reducer is applied to the joint part of an industrial robot, it is required that the RV speed reducer has high transmission accuracy, small backlash, high stiffness, strong impact resistance, compact structure, high transmission efficiency, etc., and higher requirements are also put forward for the parts and the overall structure of the RV speed reducer.

[0003] The rigid disk is a key part of the RV speed reducer. One end of it is connected to the input end of the driving motor, and the other end is connected to the crankshaft system in the second-stage transmission mechanism of the speed reducer through the cooperation of a bearing hole and a tapered roller bearing. A snap ring groove is machined on the inner side of the bearing hole of the rigid disk, and the crankshaft system is axially limited by installing a snap ring. The outer ring of the main bearing is installed in the main bearing installation position of the rigid disk, and the installation and cooperation of the whole rigid disk are completed through the cooperation with the inner ring and the ball retainer of the main bearing. The rigid disk is also connected and fixed by pin positioning and bolt tightening, and finally the assembly of the whole speed reducer and the rigid disk end is completed.

[0004] In the related art, as Figure 3 shown, the RV speed reducer includes a rigid disk 1. A bearing hole 2 is provided on the rigid disk 1, and a snap ring 3 is arranged in the bearing hole 2. Due to the presence of the snap ring 3, the available axial space in the bearing hole 2 becomes smaller. Moreover, the axial dimension of the rigid disk 1 is relatively large, and the overall weight of the rigid disk 1 is also relatively large.

[0005] It should be noted that the information disclosed in the background art part of the present invention is only intended to enhance the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Invention

[0006] An embodiment of the present invention provides a power transmission mechanism and a speed reducer of a speed reducer, which reduce the overall weight of the mounting disk.

[0007] According to one aspect of the present invention, a power transmission mechanism of a speed reducer is provided, including:

[0008] A mounting disk, including a mounting disk body and a convex platform connected to the mounting disk body. The mounting disk body includes a first end face and a second end face opposite to the first end face. The convex platform extends from the second end face in a direction away from the first end face. The mounting disk is provided with a first mounting hole and a second mounting hole. The first mounting hole extends from the mounting disk body to the convex platform, and the second mounting hole is arranged on the mounting disk body;

[0009] The first bearing is installed in the first mounting hole;

[0010] The rotating assembly is connected to one side of the first end face of the mounting disc through the first bearing; and

[0011] The driving member is drivingly connected to one side of the second end face of the mounting disc through the second mounting hole.

[0012] In some embodiments, the driving member includes a driving member body and a power output shaft. The power output shaft is inserted into the second mounting hole to be drivingly connected to the mounting disc, and there is a preset gap between the driving member body and the boss.

[0013] In some embodiments, the mounting disc further includes an axial limiting member disposed in the first mounting hole. The axial limiting member is configured to axially limit the first bearing and the rotating assembly.

[0014] In some embodiments, the first mounting hole includes a first hole section located in the mounting disc body and a second hole section located in the boss, and the axial limiting member is disposed in the second hole section.

[0015] In some embodiments, the end face of the axial limiting member away from the first end face is located on the side of the second end face away from the first end face.

[0016] In some embodiments, the axial distance between the first end face and the axial limiting member is not less than the axial height of the first bearing.

[0017] In some embodiments, the mounting disc is provided with a first groove extending from the first end face to the second end face, and the first groove communicates with the first mounting hole and the second mounting hole.

[0018] In some embodiments, the depth of the first groove in the axial direction is greater than the axial height of the boss.

[0019] In some embodiments, the speed reducer power transmission mechanism further includes a second bearing. The outer periphery of the mounting disc body is provided with a second groove extending radially inward. In the axial direction, the second groove extends from the first end face towards the direction close to the second end face, and an axial limiting portion is formed between the extending cut-off surface and the second end face. The second bearing is sleeved at the second groove of the mounting disc body and is axially limited by the axial limiting portion.

[0020] According to another aspect of the present invention, there is provided a speed reducer including the above-mentioned speed reducer power transmission mechanism.

[0021] Based on the above technical solutions, in the embodiments of the present invention, the mounting disc includes a mounting disc body and a boss, and the first mounting hole extends from the mounting disc body to the boss. In this way, on the premise of ensuring the axial length of the first mounting hole, the axial thickness of the non-boss part of the mounting disc can be reduced, thereby reducing the overall weight of the mounting disc and realizing the lightness and thinness of the mounting disc. Brief Description of the Drawings

[0022] The drawings described herein are provided to further understand the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of the second end face of the mounting plate in an embodiment of the speed reducer power transmission mechanism of the present invention.

[0024] Figure 2 It is a schematic structural diagram of the first end face of the mounting plate in an embodiment of the speed reducer power transmission mechanism of the present invention.

[0025] Figure 3 In the related art Figure 1 It is a cross-sectional view of the A-A section shown.

[0026] Figure 4 When the first bearing is not installed in the first mounting hole of the embodiment of the present invention Figure 1 It is a cross-sectional view of the A-A section shown.

[0027] Figure 5 When the first bearing is installed in the first mounting hole of the embodiment of the present invention Figure 1 It is a cross-sectional view of the A-A section shown.

[0028] Figure 6 For the embodiment of the present invention Figure 1 It is a cross-sectional view of the B-B section shown.

[0029] In the figure:

[0030] 1, Rigid disk; 2, Bearing hole; 3, Snap ring;

[0031] 10, Mounting plate; 20, First bearing;

[0032] 11, Mounting plate body; 12, Boss; 13, First mounting hole; 14, Second mounting hole; 15, Axial limiting member; 16, First groove; 17, Positioning hole; 18, Third mounting hole;

[0033] 111, First end face; 112, Second end face; 113, Second groove; 114, Extended cut-off face; 115, Axial limiting portion. Detailed Description of the Invention

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and 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 limiting the protection scope of the present invention.

[0036] Reference Figure 1 、 Figure 2 、 Figure 4 and Figure 5 As shown in

[0037] In some embodiments of the speed reducer power transmission mechanism provided by the present invention, the power transmission mechanism includes a mounting plate 10, a first bearing 20, a rotating assembly, and a driving member. The mounting plate 10 includes a mounting plate body 11 and a boss 12 connected to the mounting plate body 11. The mounting plate body 11 includes a first end face 111 and a second end face 112 opposite to the first end face 111. The boss 12 extends from the second end face 112 in a direction away from the first end face 111. The mounting plate 10 is provided with a first mounting hole 13 and a second mounting hole 14. The first mounting hole 13 extends from the mounting plate body 11 to the boss 12. The second mounting hole 14 is provided on the mounting plate body 11. The first bearing 20 is installed in the first mounting hole 13. The rotating assembly is connected to the mounting plate 10 on one side of the first end face 111 through the first bearing 20. The driving member is drivingly connected to the mounting plate 10 on one side of the second end face 112 through the second mounting hole 14.

[0038] In addition, the mounting disk 10 is set to have a structural form including a mounting disk body 11 and a boss 12, and the first mounting hole 13 extends from the mounting disk body 11 to the boss 12. This is equivalent to extending the hole wall of the first mounting hole 13 away from the first end face 111 to form a protrusion. Such a structural form facilitates the measurement of the outer diameter and depth of the first mounting hole 13 and the mounting position of the axial limiting member 15 mentioned below, and solves the problem that it is difficult to measure the above data due to position interference in the structure of the related art as shown in Figure 3 and improves the measurement accuracy of the above data.

[0039] In the above embodiment, the mounting disk body 11 and the boss 12 can be relatively independent and connected together; the mounting disk body 11 and the boss 12 can also be integrally formed.

[0040] In some embodiments, the driving member can be a power element such as a motor or a cylinder.

[0041] In some embodiments, the rotating assembly includes an eccentric shaft, a mounting bearing, and a gasket.

[0042] In the embodiments as shown in Figure 1 and Figure 2 , the mounting disk 10 is provided with two first mounting holes 13 and one second mounting hole 14. The second mounting hole 14 is located at the center of the mounting disk 10, and the two first mounting holes 13 are respectively arranged on both sides of the second mounting hole 14. A first bearing 20 can be respectively installed in each of the first mounting holes 13 on the mounting disk 10.

[0043] In other embodiments, one, three or more than three first mounting holes 13 can be provided on the mounting disk 10 to install more first bearings 20.

[0044] In some embodiments, the mounting disk 10 is further provided with a positioning hole 17 and a third mounting hole 18. A pin can be inserted into the positioning hole 17 for positioning before installing other components of the speed reducer on the mounting disk 10. The third mounting hole 18 is a threaded hole, and a bolt can be inserted into the third mounting hole 18 to realize the relative fixation of other components of the speed reducer and the mounting disk 10.

[0045] In some embodiments, the driving member includes a driving member body and a power output shaft. The power output shaft is inserted into the second mounting hole 14 to be drivingly connected with the mounting disk 10, and there is a preset gap between the driving member body and the boss 12.

[0046] By setting a preset gap between the driving member body and the boss 12, interference between the boss 12 and the driving member body can be avoided, and friction between the mounting disk 10 and the driving member body when the mounting disk 10 rotates relative to the driving member body can be avoided.

[0047] When the driving member is a motor, the driving member body is the motor housing, and the power output shaft is the output end shaft of the motor. By providing a preset gap between the boss 12 and the motor housing, interference between the boss 12 and the motor housing can be avoided when the mounting plate 10 is configured to include the mounting plate body 11 and the boss 12.

[0048] In some embodiments, the driving member body is provided with a recess, and the boss 12 is located within the recess, which can also avoid interference between the boss 12 and the driving member body.

[0049] As Figure 4 shown, in some embodiments, the mounting plate 10 further includes an axial limiting member 15 disposed in the first mounting hole 13, and the axial limiting member 15 is configured to axially limit the first bearing 20 and the rotating assembly.

[0050] By providing the axial limiting member 15, the first bearing 20 and the rotating assembly can be prevented from moving along the axis direction of the first mounting hole 13.

[0051] The axial limiting member 15 can be a limiting plate or a snap ring, etc.

[0052] The inner wall of the first mounting hole 13 is provided with a mounting groove, and the axial limiting member 15 is mounted in the mounting groove.

[0053] In some embodiments, the first mounting hole 13 includes a first hole section located in the mounting plate body 11 and a second hole section located in the boss 12, and the axial limiting member 15 is disposed in the second hole section.

[0054] By disposing the axial limiting member 15 in the second hole section, the axial dimension of the mounting space on the side of the axial limiting member 15 close to the first end face 111 within the first mounting hole 13 can be increased as much as possible to accommodate a larger-sized first bearing 20, improving the supporting effect; it can also provide more axial fitting space for the rotating assembly, which is beneficial to strengthening the structure of the rotating assembly and improving the strength of the rotating assembly.

[0055] In some embodiments, the end face of the axial limiting member 15 away from the first end face 111 is located on the side of the second end face 112 away from the first end face 111.

[0056] In the related art as Figure 3 shown, the axial limiting member 15 is located to the left of the right end face of the rigid disk 1; while in the above embodiments of the present invention, the end face of the axial limiting member 15 away from the first end face 111 is located on the side of the second end face 112 away from the first end face 111. Compared with the related art as Figure 3For the related art shown, in the embodiments of the present invention, the installation position of the axial limiting member 15 is further away from the first end face 111. Such a setting can increase the axial dimension of the installation space on the side of the axial limiting member 15 close to the first end face 111 within the first installation hole 13 as much as possible, and can also facilitate the measurement of the installation position of the axial limiting member 15.

[0057] In some embodiments, the axial distance between the first end face 111 and the axial limiting member 15 is not less than the axial height of the first bearing 20. Such a setting can provide sufficient axial mating space for the first bearing 20, and can also cause the first bearing 20 to move in a direction away from the first end face 111, thereby providing a larger optimization space inside the speed reducer.

[0058] In some embodiments, the mounting disc 10 is provided with a first groove 16 extending from the first end face 111 to the second end face 112, and the first groove 16 communicates with the first installation hole 13 and the second installation hole 14. By providing the first groove 16, space is provided for the storage and flow of the lubricating medium, ensuring the stable operation of the speed reducer.

[0059] In some embodiments, the axial depth of the first groove 16 is greater than the axial height of the boss 12.

[0060] Compared with the related art as Figure 3 shown, the axial length of the first groove 16 is also increased, thereby providing a larger space for the lubricating medium, improving the overall performance of the speed reducer; and can also provide a larger space for the installation of the rotating assembly, which is beneficial to the structural strengthening of the rotating assembly.

[0061] In some embodiments, the power transmission mechanism of the speed reducer further includes a second bearing. The outer periphery of the mounting disc body 11 is provided with a second groove 113 extending radially inward. In the axial direction, the second groove 113 extends from the first end face 111 towards the second end face 112 and an axial limiting portion 115 is formed between the extending end surface 114 and the second end face 112. The second bearing is sleeved at the second groove 113 of the mounting disc body 11 and is axially limited by the axial limiting portion 115.

[0062] The second groove 113 serves as the installation position for the second bearing, which can provide space for the installation of the second bearing. At the same time, the setting of the second groove 113 also forms an annular axial limiting portion 115 on the outer periphery of the mounting disc body 11, which can axially limit the second bearing. Compared with the related art as Figure 3 shown, it can be found that the axial thickness of the axial limiting portion 115 in the embodiments of the present invention is significantly reduced, so the overall weight of the mounting disc 10 can be reduced.

[0063] In some embodiments, the axial thickness of the axial limiting portion 115 is 16% - 30% of the total axial thickness of the mounting disc body 11.

[0064] Compared with the related art as Figure 3 shown, the axial thickness of the axial limiting portion 115 is significantly reduced, the thickness of the mounting disc body 11 becomes thinner, and the overall mounting disc 10 is thinner and lighter.

[0065] Next, in combination with Figures 1-6 a structure of an embodiment of the speed reducer power transmission mechanism of the present invention will be described:

[0066] As Figures 1-2 shown in FIGS. 4 - 6, the mounting disc 10 includes a mounting disc body 11 and a boss 12 connected to the mounting disc body 11. The mounting disc body 11 includes a first end face 111 and a second end face 112 opposite to the first end face 111. The boss 12 extends from the second end face 112 in a direction away from the first end face 111. The mounting disc 10 is provided with two first mounting holes 13 and one second mounting hole 14. The first mounting holes 13 extend from the mounting disc body 11 to the boss 12. The second mounting hole 14 is provided at a position on the mounting disc body 11 where the boss 12 is not provided. The first bearing 20 is installed in the first mounting hole 13. The rotating assembly is connected to the mounting disc 10 on one side of the first end face 111 through the first bearing 20. The driving member is drivingly connected to the mounting disc 10 on one side of the second end face 112 through the second mounting hole 14.

[0067] An axial limiting member 15 is provided in the first mounting hole 13. The mounting disc 10 is provided with a first groove 16 extending from the first end face 111 to the second end face 112. The first groove 16 communicates with the first mounting hole 13 and the second mounting hole 14.

[0068] Compared with the mounting disc structure in the related art as Figure 3 shown, in this embodiment, the first mounting hole 13 on the mounting disc 10 bulges in a direction away from the first end face 111 to form a boss 12, and there is a gap between the boss 12 and the driving member body of the driving member. The first mounting hole 13 bulges outwards, and the axial limiting member 15 provided therein can move outwards accordingly, so that the first bearing 20 also moves outwards accordingly, creating a larger optimization space inside the speed reducer; at the same time, while meeting the axial assembly requirements, the thickness of some structures of the mounting disc 10 is reduced, making the overall mounting disc 10 thinner and lighter; by means of the protruding part of the first mounting hole 13, it is also convenient to use a caliper to measure the accurate position of the mounting groove for installing the axial limiting member 15, facilitating the selection of the size of the axial limiting member 15, and solving the problem that it is difficult to measure the accurate position of the mounting groove in the structure of the related art as Figure 3 shown.

[0069] The speed reducer power transmission mechanism in each of the above embodiments can be applied to various types of speed reducers, such as RV speed reducers.

[0070] Based on the above speed reducer power transmission mechanism, the present invention also provides a speed reducer, which includes the above speed reducer power transmission mechanism.

[0071] The positive technical effects of the speed reducer power transmission mechanism in each of the above embodiments are equally applicable to the speed reducer, and will not be elaborated here.

[0072] The speed reducer embodiments provided by the present invention can be applied to various types of mechanical equipment, such as vehicles or industrial equipment, etc.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: without departing from the principle of the present invention, it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements on some technical features, and these modifications and equivalent replacements should all be covered by the scope of the technical solutions claimed by the present invention.

Claims

1. A speed reducer power transmission mechanism, characterized in that Comprising: An installation disk (10), including an installation disk body (11) and a boss (12) connected to the installation disk body (11). The installation disk body (11) includes a first end face (111) and a second end face (112) opposite to the first end face (111). The boss (12) extends from the second end face (112) in a direction away from the first end face (111). The installation disk (10) is provided with a first installation hole (13) and a second installation hole (14). The first installation hole (13) extends from the installation disk body (11) to the boss (12), and the second installation hole (14) is arranged on the installation disk body (11); A first bearing (20), installed in the first installation hole (13); A rotating assembly, connected to the first end face (111) side of the installation disk (10) through the first bearing (20); And A driving member, drivingly connected to the second end face (112) side of the installation disk (10) through the second installation hole (14); Wherein, the installation disk (10) further includes an axial limiting member (15) arranged in the first installation hole (13). The axial limiting member (15) is configured to axially limit the first bearing (20) and the rotating assembly. The first installation hole (13) includes a first hole section located in the installation disk body (11) and a second hole section located in the boss (12), and the axial limiting member (15) is arranged in the second hole section.

2. The speed reducer power transmission mechanism according to claim 1, wherein, The driving member includes a driving member body and a power output shaft. The power output shaft is inserted into the second installation hole (14) to be drivingly connected to the installation disk (10), and there is a preset gap between the driving member body and the boss (12).

3. The speed reducer power transmission mechanism according to claim 1, wherein, The end face of the axial limiting member (15) away from the first end face (111) is located on the side of the second end face (112) away from the first end face (111).

4. The speed reducer power transmission mechanism according to claim 1, characterized in that, The axial distance between the first end face (111) and the axial limiting member (15) is not less than the axial height of the first bearing (20).

5. The speed reducer power transmission mechanism according to claim 1, characterized in that, The installation disk (10) is provided with a first groove (16) extending from the first end face (111) to the second end face (112). The first groove (16) communicates with the first installation hole (13) and the second installation hole (14).

6. The speed reducer power transmission mechanism according to claim 5, wherein, The axial depth of the first groove (16) is greater than the axial height of the boss (12).

7. The speed reducer power transmission mechanism according to claim 1, characterized in that, It further includes a second bearing. The outer periphery of the installation disk body (11) is provided with a second groove (113) extending radially inward. In the axial direction, the second groove (113) extends from the first end face (111) towards the second end face (112) and an extending cut-off surface (114) forms an axial limiting portion (115) with the second end face (112). The second bearing is sleeved at the second groove (113) of the installation disk body (11) and is axially limited by the axial limiting portion (115).

8. A speed reducer, characterized in that, It includes a speed reducer power transmission mechanism as described in any one of claims 1 to 7.

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