speed reducer

Abstract

This utility model relates to the field of speed reducer technology, and discloses a speed reducer including an input mechanism, a planetary transmission mechanism, and an output mechanism. The input end of the input mechanism is connected to a power component, and the output end of the input mechanism is connected to the input shaft of the planetary transmission mechanism. The output mechanism includes a first support base, a second support base, and an output structure. The first support base is disposed on the planetary transmission mechanism, and the first and second support bases are respectively connected to an external structure via fasteners, forming a gap space between the first and second support bases. The output structure includes a rotating shaft and an output gear. One end of the rotating shaft is connected to the output shaft of the planetary transmission mechanism, and the other end is rotatably connected to the second support base. The output gear is disposed within the gap space and is coaxially arranged with the rotating shaft. The output mechanism of this utility model is fixedly disposed on the external structure, reducing vibration and ensuring the engagement of the output gear with the gear and rack to be driven, avoiding misalignment and improving transmission stability.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to a speed reducer. Background Technology

[0002] Speed ​​reducers play a crucial role in matching speeds and transmitting torque between prime movers and driven machines or actuators, and are widely used in modern machinery. Speed ​​reducers can be broadly classified into two categories based on their application: general-purpose speed reducers and special-purpose speed reducers. The design, manufacturing, and usage characteristics of these two types differ. Currently, when the output end of a speed reducer meshes with a gear or rack, it is prone to misalignment due to vibration, thus affecting the transmission stability of the speed reducer.

[0003] Therefore, it is necessary to provide a new speed reducer to solve the above-mentioned technical problems. Utility Model Content

[0004] The main purpose of this invention is to provide a speed reducer that addresses the problem of low transmission stability in existing speed reducers.

[0005] To achieve the above objectives, this utility model proposes a speed reducer, which includes an input mechanism, a planetary transmission mechanism, and an output mechanism.

[0006] The input end of the input mechanism is connected to the power component, and the output end of the input mechanism is connected to the input shaft of the planetary transmission mechanism.

[0007] The output mechanism includes a first support base, a second support base, and an output structure. The first support base is disposed on the planetary transmission mechanism, and the first support base and the second support base are disposed opposite to each other. The first support base and the second support base are respectively connected to an external structure by fasteners, and a gap space is formed between the first support base and the second support base. The output structure includes a rotating shaft and an output gear. One end of the rotating shaft is connected to the output shaft of the planetary transmission mechanism, and the other end is rotatably connected to the second support base. The output gear is disposed in the gap space and is coaxially disposed with the rotating shaft.

[0008] Optionally, the input mechanism includes a first connecting plate, an input bearing housing, and a coupling. The first connecting plate is disposed on the planetary transmission mechanism, and the input bearing housing is disposed on the first connecting plate. The coupling is rotatably connected to the first connecting plate through the input bearing housing, and the output end of the coupling is connected to the input shaft of the planetary transmission mechanism.

[0009] Optionally, the planetary transmission mechanism includes a second connecting plate and a planetary structure. One end of the second connecting plate is connected to a first connecting plate, and the other end is connected to the first support base. A mounting cavity is formed within the second connecting plate. The planetary structure includes a planet carrier, a sun gear, and planet gears. The planet carrier is rotatably disposed within the mounting cavity and is connected to the rotating shaft. The sun gear is coaxially disposed with the planet carrier and is connected to the output end of the coupling. The planet gears are disposed on the planet carrier and mesh with the sun gear. The planet carrier is connected to the rotating shaft.

[0010] Optionally, the planetary structure further includes an internal gear ring disposed on the second connecting plate, and the internal gear ring meshes with the planetary gear.

[0011] Optionally, there are multiple planetary structures, which are coaxially arranged along the direction from the input mechanism to the output mechanism, and the planet carrier of the preceding planetary structure is connected to the sun gear of the following planetary structure; the sun gear of the first planetary structure is connected to the output end of the coupling, and the planet carrier of the last planetary structure is connected to the rotating shaft.

[0012] Optionally, the second connecting plate is a one-piece molded part, and the plurality of planetary structures are disposed within the mounting cavity.

[0013] Optionally, a second connecting plate is provided for each of the planetary structures; the second connecting plate includes a mounting part, a connecting part, a partition plate, and a rotating bearing; the mounting part is connected to the first connecting plate, and the mounting part has a mounting cavity; the connecting part is connected to the mounting part, and one end of the connecting part away from the mounting part is connected to the first support plate; the partition plate is disposed in the mounting cavity, and the partition plate has a through hole; the rotating bearing is disposed at the through hole, and the planetary carrier is rotatably connected to the partition plate through the rotating bearing.

[0014] Optionally, the end of the connecting portion away from the mounting portion is provided with a stepped surface, and the fastener passes sequentially through the stepped surface in the second connecting plate corresponding to the preceding planetary structure and the internal gear ring of the subsequent planetary structure, and is connected to the mounting portion in the second connecting plate corresponding to the subsequent planetary structure.

[0015] Optionally, there may be multiple planetary gears, which are arranged circumferentially around the central axis of the sun gear.

[0016] Optionally, the output mechanism further includes mounting bearings, and the first support base and the second support base are each provided with the mounting bearings. The rotating shaft is rotatably connected to the first support base and the second support base respectively through the mounting bearings.

[0017] In this invention, the output mechanism is fixedly mounted on the external structure via a first support and a second support. The gear or rack to be driven extends into the gap space and meshes with the output gear. The input mechanism transmits the power from the power component to the rotating shaft of the output mechanism via a planetary transmission mechanism. The rotating shaft then drives the gear or rack to be driven to rotate via the output gear. The fixed mounting of the output mechanism on the external structure reduces vibration, ensuring proper engagement between the output gear and the gear or rack to be driven, preventing misalignment, and improving transmission stability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the speed reducer in an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional view of the speed reducer in an embodiment of this utility model;

[0021] Figure 3 This is a partial sectional view of the speed reducer in an embodiment of this utility model;

[0022] Figure 4 This is a cross-sectional view of the output mechanism in an embodiment of this utility model.

[0023] Explanation of icon numbers:

[0024] 1 Input mechanism, 1.1 First connecting plate, 1.2 Input bearing housing, 1.3 Coupling, 2 Planetary transmission mechanism, 2.1 Second connecting plate, 2.1.1 Mounting part, A1 mounting cavity, 2.1.2 Connecting part, A2 stepped surface, 2.1.3 Partition plate, 2.1.4 Rotating bearing, 2.2 Planetary structure, 2.2.1 Planet carrier, 2.2.2 Sun gear, 2.2.3 Planet gear, 2.2.4 Internal gear ring, 3 Output mechanism, 3.1 First support seat, 3.2 Second support seat, 3.3 Output structure, 3.3.1 Rotating shaft, 3.3.2 Output gear, 3.4 Clearance space, 3.5 Mounting bearing.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0027] This invention proposes a speed reducer, which aims to solve the problem of low transmission stability in existing speed reducers.

[0028] Example 1:

[0029] like Figure 1 As shown in Figure 4, the reducer includes an input mechanism 1, a planetary transmission mechanism 2, and an output mechanism 3. The input end of the input mechanism 1 is connected to the power component, and the output end of the input mechanism 1 is connected to the input shaft of the planetary transmission mechanism 2. The output mechanism 3 includes a first support base 3.1, a second support base 3.2, and an output structure 3.3. The first support base 3.1 is disposed on the planetary transmission mechanism 2, and the first support base 3.1 and the second support base 3.2 are disposed opposite to each other. The first support base 3.1 and the second support base 3.2 are respectively connected to the external structure by fasteners, and a gap space 3.4 is formed between the first support base 3.1 and the second support base 3.2. The output structure 3.3 includes a rotating shaft 3.3.1 and an output gear 3.3.2. One end of the rotating shaft 3.3.1 is connected to the output shaft of the planetary transmission mechanism 2, and the other end is rotatably connected to the second support base 3.2. The output gear 3.3.2 is disposed in the gap space 3.4 and is coaxial with the rotating shaft 3.3.1. The output mechanism 3 is fixedly mounted on the external structure via a first support 3.1 and a second support 3.2. The gear or rack to be driven extends into the gap space 3.4 and meshes with the output gear 3.3.2. The input mechanism 1 transmits the power from the power component to the rotating shaft 3.3.1 of the output mechanism 3 through the planetary transmission mechanism 2. The rotating shaft 3.3.1 then drives the gear or rack to be driven to rotate via the output gear 3.3.2. The fixed mounting of the output mechanism 3 on the external structure reduces vibration, ensures proper engagement between the output gear 3.3.2 and the gear or rack to be driven, prevents misalignment, and improves transmission stability.

[0030] like Figure 2 and Figure 3As shown, the input mechanism 1 includes a first connecting plate 1.1, an input bearing housing 1.2, and a coupling 1.3. The first connecting plate 1.1 is mounted on the planetary transmission mechanism 2, and the input bearing housing 1.2 is mounted on the first connecting plate 1.1. The coupling 1.3 is rotatably connected to the first connecting plate 1.1 via the input bearing housing 1.2, and its output end is connected to the input shaft of the planetary transmission mechanism 2. The input mechanism 1 is connected to an external power source or other reducer via the coupling 1.3, and transmits power to the planetary transmission mechanism 2 through its output end. The coupling 1.3 is rotatably mounted on the first connecting plate 1.1, which is mounted on the planetary transmission mechanism 2. This design ensures the stability between the input mechanism 1 and the planetary transmission mechanism 2 and improves the versatility of the reducer. Preferably, the power source is a motor.

[0031] Specifically, the planetary transmission mechanism 2 includes a second connecting plate 2.1 and a planetary structure 2.2. One end of the second connecting plate 2.1 is connected to the first connecting plate 1.1, and the other end is connected to the first support base 3.1. An installation cavity A1 is formed inside the second connecting plate 2.1. The planetary structure 2.2 includes a planet carrier 2.2.1, a sun gear 2.2.2, and planet gears 2.2.3. The planet carrier 2.2.1 is rotatably disposed in the installation cavity A1 and is connected to the rotating shaft 3.3.1. The sun gear 2.2.2 is coaxially disposed with the planet carrier 2.2.1 and is connected to the output end of the coupling 1.3. The planet gears 2.2.3 are disposed on the planet carrier 2.2.1 and mesh with the sun gear 2.2.2. The planet carrier 2.2.1 is connected to the rotating shaft 3.3.1. The sun gear 2.2.2 has a splined shaft end, which connects to the splined hole at one end of the coupling 1.3. The coupling 1.3 transmits power from the power component to the sun gear 2.2.2, causing it to rotate. The sun gear 2.2.2 meshes with the planet gear 2.2.3 and is coaxially mounted with the planet carrier 2.2.1. Thus, the sun gear 2.2.2 drives the planet carrier 2.2.1 to rotate coaxially, while simultaneously driving the planet gear 2.2.3 to rotate around the sun gear 2.2.2. Furthermore, the planet carrier 2.2.1 drives the output gear 3.3.2 to rotate via the rotating shaft 3.3.1. Power is transmitted between the input mechanism 1 and the output mechanism 3 through the planetary transmission mechanism 2, effectively improving transmission stability.

[0032] The planetary structure 2.2 also includes an internal gear ring 2.2.4, which is mounted on the second connecting plate 2.1 and meshes with planet gears 2.2.3. The two sides of the planet gears 2.2.3 mesh with the internal gear ring 2.2.4 and the sun gear 2.2.2 respectively, ensuring a tight fit between the planet gears 2.2.3 and the second connecting plate 2.1, improving space utilization, and also providing a guiding function.

[0033] Furthermore, there are multiple planetary structures 2.2, which are coaxially arranged along the direction from the input mechanism 1 to the output mechanism 3. The planet carrier 2.2.1 of the preceding planetary structure 2.2 is connected to the sun gear 2.2.2 of the following planetary structure 2.2. The sun gear 2.2.2 of the first planetary structure 2.2 is connected to the output end of the coupling 1.3, and the planet carrier 2.2.1 of the last planetary structure 2.2 is connected to the rotating shaft 3.3.1. The transmission of multiple planetary structures 2.2 enables high-speed ratio rotation, thereby meeting the high load requirements of the output gear 3.3.2. Preferably, there are four planetary structures 2.2, namely, a first-stage planetary structure 2.2, a second-stage planetary structure 2.2, a third-stage planetary structure 2.2, and a fourth-stage planetary structure 2.2. In operation, coupling 1.3 connects to a power source, driving the sun gear 2.2.2 of the first-stage planetary structure 2.2 to rotate, thereby synchronizing the rotation of the planet gears 2.2.3 and the planet carrier 2.2.1 of the first-stage planetary structure 2.2. The sun gear 2.2.2 of the second-stage planetary structure 2.2 is driven to rotate by the planet carrier 2.2.1 of the first-stage planetary structure 2.2, thereby synchronizing the rotation of the planet gears 2.2.3 and the planet carrier 2.2.1 of the second-stage planetary structure 2.2. The sun gear 2.2.2 of the third-stage planetary structure 2.2 is driven to rotate by the second-stage planetary structure 2.2. The planet carrier 2.2.1 drives the rotation of the planetary gears 2.2.3 and the planetary carrier 2.2.1 of the third-stage planetary structure 2.2. The sun gear 2.2.2 of the fourth-stage planetary structure 2.2 is driven by the planetary carrier 2.2.1 of the third-stage planetary structure 2.2, thus synchronizing the rotation of the planetary gears 2.2.3 and the planetary carrier 2.2.1 of the fourth-stage planetary structure 2.2. The shaft 3.3.1 of the output mechanism 3 is driven by the planetary carrier 2.2.1 of the fourth-stage planetary structure 2.2. The output gear 3.3.2 on the shaft 3.3.1 meshes with the gear or rack to be driven, and the power of the output gear 3.3.2 is finally transmitted to the gear or rack to be driven, so that the torque amplification factor can reach 2500 or more. Among them, the spline connection between the sun gears 2.2.2 and the planet carrier 2.2.1, and between the planet carrier 2.2.1 and the output gear 3.3.2 shaft, can be replaced by a flat key or a semi-circular key.

[0034] Furthermore, the second connecting plate 2.1 is a one-piece molded component, and multiple planetary structures 2.2 are all disposed within the mounting cavity A1. The internal gear rings 2.2.4 of each planetary structure 2.2 are spaced apart on the second connecting plate 2.1. The one-piece molded nature of the second connecting plate 2.1 is beneficial for improving assembly efficiency and facilitating mass production.

[0035] In addition, there are multiple planetary gears 2.2.3, which are arranged circumferentially around the central axis of the sun gear 2.2.2. The presence of multiple planetary gears 2.2.3 improves the rotational stability of the sun gear 2.2.2, further enhancing transmission stability. Preferably, there are 3 to 6 planetary gears 2.2.3.

[0036] In addition, the output mechanism 3 also includes mounting bearings 3.5. Mounting bearings 3.5 are provided on both the first support 3.1 and the second support 3.2. The rotating shaft 3.3.1 is rotatably connected to the first support 3.1 and the second support 3.2 respectively via the mounting bearings 3.5. The mounting bearings 3.5 ensure stable rotation of the rotating shaft 3.3.1 while making the mounting structure more compact.

[0037] Example 2:

[0038] The difference from Embodiment 1 is that: a planetary structure 2.2 is provided with a second connecting plate 2.1; the second connecting plate 2.1 includes a mounting part 2.1.1, a connecting part 2.1.2, a partition plate 2.1.3 and a rotating bearing 2.1.4. The mounting part 2.1.1 is connected to the first connecting plate 1.1, and the mounting part 2.1.1 is provided with a mounting cavity A1; the connecting part 2.1.2 is connected to the mounting part 2.1.1, and the end of the connecting part 2.1.2 away from the mounting part 2.1.1 is connected to the first support plate; the partition plate 2.1.3 is provided in the mounting cavity A1, and a through hole is provided on the partition plate 2.1.3. The rotating bearing 2.1.4 is provided at the through hole, and the planetary carrier 2.2.1 is rotatably connected to the partition plate 2.1.3 through the rotating bearing 2.1.4. The partition plate 2.1.3 provides an installation platform for the planetary carrier 2.2.1 and separates the planetary gears 2.2.3 of adjacent planetary structures 2.2 to avoid mutual interference. Each planetary structure 2.2 uses a separate connection, resulting in simple component structure, low manufacturing difficulty, good maintenance performance, and strong interchangeability. The internal gear rings 2.2.4 of each planetary mechanism are interconnected using corresponding second connecting plates 2.1, resulting in a compact structure that meets high precision requirements.

[0039] Specifically, the end of the connecting part 2.1.2 away from the mounting part 2.1.1 has a stepped surface A2. The fastener passes sequentially through the stepped surface A2 in the second connecting plate 2.1 corresponding to the preceding planetary structure 2.2 and the internal gear ring 2.2.4 of the following planetary structure 2.2, and connects with the mounting part 2.1.1 in the second connecting plate 2.1 corresponding to the following planetary structure 2.2. The stepped surface A2 formed by the connecting part 2.1.2 facilitates the connection of the fastener to the second connecting plates 2.1 of two adjacent planetary structures 2.2, and avoids interference between the fastener and other components.

[0040] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A speed reducer, characterized in that, The speed reducer includes an input mechanism (1), a planetary transmission mechanism (2), and an output mechanism (3). The input end of the input mechanism (1) is connected to the power component, and the output end of the input mechanism (1) is connected to the input shaft of the planetary transmission mechanism (2). The output mechanism (3) includes a first support base (3.1), a second support base (3.2), and an output structure (3.3). The first support base (3.1) is disposed on the planetary transmission mechanism (2), and the first support base (3.1) and the second support base (3.2) are disposed opposite to each other. The first support base (3.1) and the second support base (3.2) are respectively connected to an external structure by fasteners, and a gap space (3.4) is formed between the first support base (3.1) and the second support base (3.2). The output structure (3.3) includes a rotating shaft (3.3.1) and an output gear (3.3.2). One end of the rotating shaft (3.3.1) is connected to the output shaft of the planetary transmission mechanism (2), and the other end is rotatably connected to the second support base (3.2). The output gear (3.3.2) is disposed in the gap space (3.4) and is coaxially disposed with the rotating shaft (3.3.1).

2. The speed reducer as described in claim 1, characterized in that, The input mechanism (1) includes a first connecting plate (1.1), an input bearing seat (1.2), and a coupling (1.3). The first connecting plate (1.1) is disposed on the planetary transmission mechanism (2), and the input bearing seat (1.2) is disposed on the first connecting plate (1.1). The coupling (1.3) is rotatably connected to the first connecting plate (1.1) through the input bearing seat (1.2), and the output end of the coupling (1.3) is connected to the input shaft of the planetary transmission mechanism (2).

3. The speed reducer as described in claim 2, characterized in that, The planetary transmission mechanism (2) includes a second connecting plate (2.1) and a planetary structure (2.2). One end of the second connecting plate (2.1) is connected to the first connecting plate (1.1), and the other end is connected to the first support base (3.1). A mounting cavity (A1) is formed in the second connecting plate (2.1). The planetary structure (2.2) includes a planet carrier (2.2.1), a sun gear (2.2.2), and planet gears (2.2.3). The planet carrier (2.2.1) is rotatably mounted in the mounting cavity (A1). The planet carrier (2.2.1) is connected to the rotating shaft (3.3.1); the sun gear (2.2.2) is coaxially arranged with the planet carrier (2.2.1) and is connected to the output end of the coupling (1.3); the planet gear (2.2.3) is arranged on the planet carrier (2.2.1) and meshes with the sun gear (2.2.2); the planet carrier (2.2.1) is connected to the rotating shaft (3.3.1).

4. The speed reducer as described in claim 3, characterized in that, The planetary structure (2.2) further includes an internal gear ring (2.2.4), which is disposed on the second connecting plate (2.1) and meshes with the planetary gear (2.2.3).

5. The speed reducer as described in claim 4, characterized in that, The number of planetary structures (2.2) is multiple, and the multiple planetary structures (2.2) are coaxially arranged along the direction from the input mechanism (1) to the output mechanism (3), and the planet carrier (2.2.1) of the previous planetary structure (2.2) is connected to the sun gear (2.2.2) of the next planetary structure (2.2); the sun gear (2.2.2) of the first planetary structure (2.2) is connected to the output end of the coupling (1.3), and the planet carrier (2.2.1) of the tail planetary structure (2.2) is connected to the rotating shaft (3.3.1).

6. The speed reducer as described in claim 5, characterized in that, The second connecting plate (2.1) is an integrally molded part, and the multiple planetary structures (2.2) are all disposed in the mounting cavity (A1).

7. The speed reducer as described in claim 5, characterized in that, A second connecting plate (2.1) is correspondingly provided for the planetary structure (2.2); the second connecting plate (2.1) includes a mounting part (2.1.1), a connecting part (2.1.2), a partition plate (2.1.3), and a rotating bearing (2.1.4). The mounting part (2.1.1) is connected to the first connecting plate (1.1) or the connecting part (2.1.2) of the previous planetary structure (2.2), and the mounting part (2.1.1) is provided with the mounting cavity (A1); the connecting part (2.1.2) is connected to the mounting part (2.1.4). .1) The connecting part (2.1.2) is connected to the first support base (3.1) or the mounting part (2.1.1) of the previous planetary structure (2.2) at one end away from the mounting part (2.1.1); the partition plate (2.1.3) is disposed in the mounting cavity (A1), and the partition plate (2.1.3) is provided with a through hole, the rotating bearing (2.1.4) is disposed at the through hole, and the planetary carrier (2.2.1) is rotatably connected to the partition plate (2.1.3) through the rotating bearing (2.1.4).

8. The speed reducer as described in claim 7, characterized in that, The connecting part (2.1.2) has a stepped surface (A2) at the end away from the mounting part (2.1.1). The fastener passes through the stepped surface (A2) in the second connecting plate (2.1) of the preceding planetary structure (2.2) and the internal gear ring (2.2.4) of the following planetary structure (2.2) in sequence, and is connected to the mounting part (2.1.1) in the second connecting plate (2.1) of the following planetary structure (2.2).

9. The speed reducer according to any one of claims 3 to 8, characterized in that, The number of planetary gears (2.2.3) is multiple, and the multiple planetary gears (2.2.3) are arranged circumferentially around the central axis of the sun gear (2.2.2).

10. The speed reducer according to any one of claims 1 to 8, characterized in that, The output mechanism (3) further includes a mounting bearing (3.5), which is provided on both the first support base (3.1) and the second support base (3.2). The rotating shaft (3.3.1) is rotatably connected to the first support base (3.1) and the second support base (3.2) respectively through the mounting bearing (3.5).

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