Rv reducer and reduction motor thereof

Abstract

The utility model belongs to the field of speed reducer, concretely relates to a RV speed reducer and speed reducing motor, include: the eccentric shaft that is equipped with eccentric wheel in the middle part, the cycloid disc that is equipped with the outer tooth of edge portion is covered in eccentric wheel, is equipped with the through -hole of annular distribution on the cycloid disc, the gear ring that is covered in the outside of cycloid disc and is equipped with the inner tooth, the inner tooth gear flows with the outer tooth when the eccentric rotation of cycloid disc is engaged, the pin shaft that is less than the through -hole in diameter is penetrated through the through -hole, the first flange of being located in one side of cycloid disc, first flange is equipped with the first mounting hole of pin axle one end is covered, and, the second flange of being located in the other side of cycloid disc, second flange is equipped with the second mounting hole of pin axle other end is covered. The utility model provides with pin axle and flange is made into separation structure, on the one hand, reduces processing cost, still is convenient for overhauling and maintenance. The utility model is equipped with first flange and second flange can be used as output flange, make it have stronger applicability. The utility model can also effectively reduce the vibration of cycloid disc swing.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducers, specifically relating to an RV speed reducer and its speed reducer motor. Background Technology

[0002] In existing RV reducer designs, the pin shaft and output flange are usually integrated into a single structure. While this traditional design ensures structural integrity to some extent, it has revealed many problems in practical applications.

[0003] On the one hand, the integrated structure is more difficult to manufacture. Since the pin and output flange are integrated, high-precision dimensional and geometric tolerances must be ensured at the connection point during processing, which places extremely high demands on the processing equipment and processes. Even minor machining errors can affect the performance of the entire reducer, leading to increased scrap rates and higher production costs.

[0004] On the other hand, from a maintenance and repair perspective, the integrated structure is extremely inconvenient. When a part of the pin or output flange wears or is damaged, because the two are integrated, the entire unit often needs to be replaced, rather than replacing the damaged part separately. This not only wastes resources but also greatly increases maintenance costs and downtime.

[0005] Furthermore, the integrated structure also has limitations in terms of product upgrades and personalized customization. Different application scenarios may have different performance requirements for the pin shaft and output flange of the RV reducer, and the integrated structure makes it difficult to optimize the pin shaft and output flange separately, making it difficult to quickly meet diverse market demands.

[0006] In summary, the existing integrated structure of the RV reducer pin shaft and output flange has significant shortcomings in terms of processing and manufacturing, maintenance and repair, and product upgrade customization. An innovative design is urgently needed to solve these problems in order to improve the overall performance and market competitiveness of RV reducers. Utility Model Content

[0007] The RV reducer provided by this utility model can effectively solve the problems in the background art.

[0008] This utility model provides an RV reducer, comprising:

[0009] An eccentric shaft with an eccentric wheel in the middle;

[0010] A cycloidal disk fitted on an eccentric wheel and having external teeth on its edge, the cycloidal disk having annularly distributed through holes;

[0011] A gear ring fitted around the cycloidal disk and equipped with internal teeth; when the cycloidal disk rotates eccentrically, the internal gear meshes with the external teeth.

[0012] A pin that penetrates a through hole and has a diameter smaller than the through hole;

[0013] The first flange is located on one side of the cycloidal disk, and the first flange is provided with a first mounting hole that fits one end of the pin.

[0014] In addition, a second flange is located on the other side of the cycloidal disc, the second flange having a second mounting hole that fits over the other end of the pin.

[0015] As a further optimization of this utility model, the eccentric shaft is provided with a first eccentric wheel and a second eccentric wheel; a first cycloidal disc and a second cycloidal disc are provided corresponding to the first eccentric wheel and the second eccentric wheel.

[0016] As a further optimization of this utility model, a sleeve is provided between the first eccentric wheel and the second eccentric wheel, which is sleeved outside the eccentric shaft, and the two end faces of the sleeve respectively abut against one face of the first eccentric wheel and the second eccentric wheel.

[0017] As a further optimization of this utility model, a first bearing is provided between the eccentric wheel and the cycloidal disk.

[0018] As a further optimization of this utility model, a second bearing is provided between the first flange and the second flange and the eccentric shaft.

[0019] As a further optimization of this utility model, the inner wall of the gear ring is provided with a non-internal toothed portion, and a third bearing is provided between the first flange and the second flange and the non-internal toothed portion.

[0020] As a further optimization of this utility model, the inner teeth of the gear ring are arc-shaped protrusions.

[0021] As a further optimization of this utility model, the inner wall of the gear ring is provided with an arc-shaped groove, and also includes a cylindrical needle roller, which is located in the groove to form an arc-shaped protrusion.

[0022] This utility model also provides a geared motor, which further includes a housing in which the RV reducer is integrated, and the housing is further provided with:

[0023] A rotor that can drive an eccentric shaft to rotate:

[0024] A stator that is integrated with the rotor and can excite the rotor to rotate;

[0025] Motor-side encoder used to measure rotor rotation information;

[0026] A motor driver that drives the rotor to rotate;

[0027] And, an end encoder that measures the rotation information at the output end.

[0028] As a further optimization of this utility model, the eccentric shaft is a hollow structure; it also includes a solid or hollow rotating shaft disposed within the hollow eccentric shaft, and an end encoder measures the rotation information of the rotating shaft.

[0029] This utility model provides an RV reducer that separates the pin and flange, reducing manufacturing costs and facilitating inspection and maintenance. Both the first and second flanges can be used as output flanges, enhancing its versatility. This utility model also effectively reduces vibration from the cycloidal disc's oscillation. Attached Figure Description

[0030] Figure 1 This is a cross-sectional structural diagram of Example 1;

[0031] Figure 2 yes Figure 1 The structural diagrams, including the first flange, are omitted.

[0032] Figure 3 yes Figure 1 Schematic diagram of the eccentric shaft structure;

[0033] Figure 4 yes Figure 1 Schematic diagram of the first cycloidal disc structure;

[0034] Figure 5 yes Figure 1 Schematic diagram of the intermediate gear ring structure;

[0035] Figure 6 yes Figure 1 Schematic diagram of the first flange structure;

[0036] Figure 7 yes Figure 1 Schematic diagram of the second flange structure;

[0037] Figure 8 This is a cross-sectional structural diagram of Example 2;

[0038] Among them, eccentric shaft 1, first eccentric wheel 1a, second eccentric wheel 1b, first cycloidal disk 2a, second cycloidal disk 2b, through hole 2c, external tooth 2d, gear ring 3, arc groove 3a, needle roller 3c, pin shaft 4, first flange 5, first mounting hole 5a, second flange 6, second mounting hole 6a, sleeve 7, first bearing 8, second bearing 9, third bearing 10, stator 11, rotor 12, flange 13, rotating shaft 14, housing 15. Detailed Implementation

[0039] Example 1

[0040] like Figure 1-7 As shown, this embodiment includes an eccentric shaft 1, a cycloidal disk, a gear ring 3, a pin 4, a first flange 5, and a second flange 6.

[0041] An eccentric wheel is provided in the middle of the eccentric shaft 1. In order to reduce the vibration of the eccentric wheel when the eccentric shaft 1 rotates, two eccentric wheels are provided on the eccentric shaft 1, one above the other, namely the first eccentric wheel 1a and the second eccentric wheel 1b.

[0042] The first eccentric wheel 1a and the second eccentric wheel 1b have the same shape and size, the difference being that the offset direction of the axis of the first eccentric wheel 1a relative to the axis of the eccentric shaft 1 is different from the offset direction of the axis of the second eccentric wheel 1b relative to the axis of the eccentric shaft 1. In other embodiments, only one eccentric wheel, three eccentric wheels, or other numbers of eccentric wheels may be provided.

[0043] In this embodiment, a first cycloidal disk 2a and a second cycloidal disk 2b are provided corresponding to the first eccentric wheel 1a and the second eccentric wheel 1b.

[0044] The first cycloidal disk 2a is sleeved on the first eccentric wheel 1a. Specifically, the first cycloidal disk 2a and the first eccentric wheel 1a are provided with a first bearing 8, which connects the first cycloidal disk 2a and the first eccentric wheel 1a.

[0045] Similarly, the second cycloidal disk 2b is sleeved on the second eccentric wheel 1b, and a first bearing 8 is also provided between the second cycloidal disk 2b and the second eccentric wheel 1b.

[0046] The first cycloidal disk 2a and the second cycloidal disk 2b are also provided with annularly distributed through holes 2c.

[0047] The outer rings of the first cycloidal disk 2a and the second cycloidal disk 2b are provided with external teeth 2d. In this embodiment, the external teeth 2d are arc-shaped external teeth.

[0048] The gear ring 3 is fitted around the first cycloidal disk 2a and the second cycloidal disk 2b. The gear ring 3 has internal teeth corresponding to the external teeth 2d, and the internal teeth are also arc-shaped. Specifically, an arc-shaped groove 3a is provided on the inner wall of the gear ring 3, and a cylindrical needle roller 3c corresponding to the shape and size of the arc-shaped groove 3a is provided. The needle roller 3c is placed in the groove, and the part of the needle roller 3c protruding from the arc-shaped groove 3a forms an arc-shaped protrusion. The arc-shaped protrusion can engage with the groove between the arc-shaped external teeth.

[0049] The inner diameter of the gear ring 3 is larger than the outer diameter of the first cycloidal disk 2a and the second cycloidal disk 2b. This is so that when the first cycloidal disk 2a and the second cycloidal disk 2b rotate eccentrically, the outer teeth 2d will mesh with the inner teeth in turn as they rotate.

[0050] To prevent relative axial movement between the first cycloidal disk 2a and the second cycloidal disk 2b during rotation, this embodiment also provides a sleeve 7. The sleeve 7 is sleeved outside the eccentric shaft 1 and located between the first eccentric wheel 1a and the second eccentric wheel 1b. The two end faces of the sleeve 7 respectively abut against one face of the first eccentric wheel 1a and the second eccentric wheel 1b.

[0051] The pin 4 passes through the through hole 2c on both the first cycloidal disk 2a and the second cycloidal disk 2b. The pin 4 is cylindrical and its diameter is smaller than that of the through hole 2c.

[0052] The first flange 5 is located on the upper side of the first cycloidal disk 2a. The first flange 5 is provided with a first mounting hole 5a at the upper end of the pin 4, and the upper end of the pin 4 is inserted into the first mounting hole 5a.

[0053] The second flange 6 is located on the lower side of the second cycloidal disk 2b. The second flange 6 has a second mounting hole 6a at the lower end of the pin 4, and the lower end of the pin 4 is inserted into the second mounting hole 6a.

[0054] In this embodiment, each rotation of the eccentric shaft 1 causes the outer teeth 2d of the first cycloidal disk 2a and the second cycloidal disk 2b to rotate one notch relative to the inner teeth of the gear ring 3. Through the pin shaft 4, the first cycloidal disk 2a and the second cycloidal disk 2b further drive the first flange 5 and the second flange 6 to rotate at a certain angle, thereby achieving the effect of deceleration.

[0055] This embodiment adopts a detachable structure of pin 4, first flange 5 and second flange 6. In addition to facilitating installation and maintenance and reducing processing costs, it also allows both first flange 5 and second flange 6 to be used as output ends.

[0056] Preferably, in this embodiment, the first flange 5 is sleeved on the eccentric shaft 1, and the first flange 5 and the eccentric shaft 1 are connected by the second bearing 9. Similarly, the second flange 6 is sleeved on the eccentric shaft 1, and the second flange 6 and the eccentric shaft 1 are also connected by the second bearing 9. This preferred structure ensures that eccentric rotation will not occur when the first flange 5 or the second flange 6 is used as an output end.

[0057] Preferably, in this embodiment, the inner wall of the gear ring 3 is further provided with a non-internal toothed portion, and a third bearing 10 is provided between the first flange 5 and the second flange 6 and the non-internal toothed portion. This structure can further enhance the protection against eccentric rotation when the first flange 5 or the second flange 6 is used as an output end.

[0058] Example 2

[0059] like Figure 8 As shown, this embodiment provides a geared motor, including a housing 15, a rotor 12, a stator 11, a motor end encoder, a motor driver, and an end encoder.

[0060] The housing 15 integrates the RV reducer, rotor 12, stator 11, motor end encoder, motor driver and end encoder from Embodiment 1.

[0061] The stator 11 is mounted outside the eccentric shaft 1 to excite the rotor 12 to rotate.

[0062] The rotor 12 is sleeved on the stator 11, and the end of the rotor 12 is provided with a flange 13 that passes over the rotor 12 and is fixed to the eccentric shaft 1. In other embodiments, the rotor 12 can also be directly sleeved on the eccentric shaft, and the stator 11 can be sleeved on the outside of the rotor 12.

[0063] In this embodiment, the point extreme encoder is used to measure the rotational information of the rotor 12, including speed, angle, and position.

[0064] The end encoder is used to measure the rotation information of the eccentric shaft.

[0065] In this embodiment, the eccentric shaft 1 is configured as a hollow structure, and a hollow rotating shaft 14 is also provided. The eccentric shaft 1 is sleeved on the rotating shaft 14. In this embodiment, the first flange 5 serves as the output end, and the rotating shaft 14 is connected to the first flange 5. An end encoder measures the rotation information of the rotating shaft 14. In other embodiments, the rotating shaft 14 can also be configured as a solid mechanism.

[0066] It should be noted that the descriptions of directions such as up, down, left, right, front, back, top, bottom, inside, outside, horizontal, and vertical in this application are all based on the accompanying drawings in the specification and are intended to clearly express the technical solution, not to limit the scope of protection.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An RV reducer, characterized in that, include: An eccentric shaft with an eccentric wheel in the middle; A cycloidal disk fitted on an eccentric wheel and having external teeth on its edge, the cycloidal disk having annularly distributed through holes; A gear ring fitted around the cycloidal disk and equipped with internal teeth; when the cycloidal disk rotates eccentrically, the internal gear meshes with the external teeth. A pin that penetrates a through hole and has a diameter smaller than the through hole; The first flange is located on one side of the cycloidal disk, and the first flange is provided with a first mounting hole that fits one end of the pin. In addition, a second flange is located on the other side of the cycloidal disc, the second flange having a second mounting hole that fits over the other end of the pin.

2. An RV reducer according to claim 1, characterized in that, The eccentric shaft is provided with a first eccentric wheel and a second eccentric wheel; corresponding to the first eccentric wheel and the second eccentric wheel are a first cycloidal disc and a second cycloidal disc.

3. An RV reducer according to claim 2, characterized in that, A sleeve is provided between the first eccentric wheel and the second eccentric wheel, which is fitted outside the eccentric shaft. The two end faces of the sleeve abut against one face of the first eccentric wheel and the second eccentric wheel, respectively.

4. An RV reducer according to claim 1, characterized in that, A first bearing is provided between the eccentric wheel and the cycloidal disc.

5. An RV reducer according to claim 1, characterized in that, A second bearing is provided between the first and second flanges and the eccentric shaft.

6. An RV reducer according to claim 1, characterized in that, The inner wall of the gear ring has a non-internal toothed section, and a third bearing is provided between the first flange and the second flange and the non-internal toothed section.

7. An RV reducer according to claim 1, characterized in that, The inner teeth of the gear ring are arc-shaped protrusions.

8. An RV reducer according to claim 7, characterized in that, The inner wall of the gear ring is provided with an arc-shaped groove, and also includes cylindrical needle rollers, which are positioned in the groove to form an arc-shaped protrusion.

9. A geared motor, characterized in that, It also includes a housing that integrates the RV reducer of claim 1 internally, and the housing further comprises: A rotor that can drive an eccentric shaft to rotate: A stator that is integrated with the rotor and can excite the rotor to rotate; Motor-side encoder used to measure rotor rotation information; A motor driver that drives the rotor to rotate; And, an end encoder that measures the rotation information at the output end.

10. A geared motor according to claim 9, characterized in that, The eccentric shaft is a hollow structure; it also includes a solid or hollow rotating shaft located inside the hollow eccentric shaft, the rotating shaft is connected to the first flange, and the end encoder measures the rotation information of the rotating shaft.

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