Double-speed-ratio differential star wheel speed reducer

Abstract

The utility model discloses a double-speed-ratio differential star wheel speed reducer, which relates to the technical field of speed reducers, and comprises a base, a first side cover, an input gear shaft, an inner gear ring shell and an output shaft, one side of the inner gear ring shell is fixedly connected with a heat dissipation mechanism through a bolt, and the output shaft is rotatably connected with the heat dissipation mechanism. When the speed reducer runs for a long time, the pull rod is pulled, the end of the metal strip is separated from the magnet block, the metal strip is made of metal materials and has certain elasticity, the metal strip slides in the annular groove, the multiple sets of heat dissipation seams are exposed, the interior of the machine body is communicated with the exterior, and a certain amount of outward centrifugal force can be generated when the multiple gears in the machine body rotate; heat in the machine body is discharged through the multiple sets of heat dissipation seams, outward flowing of heat air is accelerated, and the purposes of heat dissipation and cooling are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to a double-speed ratio differential star gear reducer. Background Art

[0002] A planetary reducer is a gear transmission device that uses internal meshing, usually called a planetary reducer or planetary reducer. It is one of the most widely used transmission equipment in modern industrial production and life, and is widely used in metallurgy, mining, electrical engineering, lifting, transportation, petrochemical, light industrial machinery and other equipment.

[0003] However, in the prior art, the planetary gear reducer is fixedly installed somewhere, connected to the load, and drives the load to operate by reducing speed and increasing torque. Both the load and the planetary gear reducer need to work for a long time. For a relatively small planetary gear reducer, after a long period of operation, the heat in its small inner cavity will accumulate rapidly, causing the temperature to rise quickly and the heat to dissipate slowly, resulting in a decrease in lubricating oil performance, aging of seals and shortened bearing life, thereby shortening the life of the small planetary gear reducer. Summary of the invention

[0004] The purpose of the utility model is to solve the problem in the prior art that after long-term operation, heat in the smaller inner cavity of a small planetary gear reducer will accumulate rapidly, causing the temperature to rise quickly and the heat dissipation to be slow, resulting in a decrease in lubricating oil performance, aging of seals and shortened bearing life, thereby shortening the life of the small planetary gear reducer, and a dual-speed ratio differential planetary gear reducer is proposed to solve the problem that

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a double-speed ratio differential star gear reducer, comprising a base, a first side cover, an input gear shaft, an inner gear ring shell and an output shaft, one side of the inner gear ring shell is fixedly connected with a heat dissipation mechanism by bolts, the output shaft is rotatably connected to the heat dissipation mechanism, the heat dissipation mechanism comprises a second side cover, an iron magnet, a metal strip and a pull rod, an annular groove is provided on the upper outer portion of the second side cover, a plurality of heat dissipation slits are provided inside the annular groove, the iron magnet is fixedly connected to the end of the annular groove, the metal strip is slidably clamped on the inner wall of the annular groove, and the pull rod is fixedly connected to the end of the metal strip.

[0006] Preferably, the middle portion of the second side cover is rotatably connected to the output shaft via a bearing, and the other end of the output shaft is fixedly mounted with a second planet carrier.

[0007] Preferably, the other side of the second planet carrier is rotatably connected to a plurality of sets of second planetary gears, and the plurality of sets of second planetary gears are meshingly connected to the inner wall of the internal gear ring housing.

[0008] Preferably, a plurality of sets of the second planetary gears are meshedly connected with a transfer gear in the middle, and a first planet carrier is fixedly mounted on the middle of the transfer gear.

[0009] Preferably, the other side of the first planet carrier is rotatably connected to a plurality of first planetary gear sets, and the plurality of first planetary gear sets are meshingly connected to the inner wall of the internal gear ring housing.

[0010] Preferably, the input gear shaft is meshedly connected at the middle position of the plurality of groups of the first planetary gears, and the center points of the input gear shaft, the intermediate gear and the output shaft are located on the same straight line.

[0011] Preferably, the shaft portion of the input gear shaft is rotatably connected to the middle portion of the first side cover via a bearing, the first side cover is fixedly connected to the inner gear ring housing via bolts, and the inner gear ring housing is fixedly connected to the base.

[0012] Compared with the prior art, the advantages and positive effects of the utility model are:

[0013] 1. In the utility model, when the reducer is running for a long time, the pull rod is pulled, and the end of the metal strip is separated from the magnetic block. The metal strip is made of metal material and has a certain elasticity. The metal strip slides in the annular groove, and multiple groups of heat dissipation slits are exposed, connecting the inside of the body with the outside. When multiple gears inside the body rotate, a certain amount of outward centrifugal force will be generated. The heat inside the body is discharged through the multiple groups of heat dissipation slits, accelerating the outward flow of hot air to achieve the purpose of heat dissipation and cooling. When the reducer is not running, the end of the metal strip is attracted by the magnetic block, so that the metal strip covers the multiple groups of heat dissipation slits, preventing external dust and other impurities from entering, and effectively protecting the body.

[0014] 2. In the utility model, when power is transmitted to the input gear shaft, the input gear shaft rotates in the middle of the first side cover, thereby driving multiple groups of first planetary gears to rotate along the internal teeth of the inner gear ring housing. The radius of the gear in the input gear shaft is smaller than the radius of the first planetary gear, realizing primary deceleration. The synchronous rotation of multiple groups of first planetary gears drives the first planetary carrier to rotate, and then drives the transfer gear to rotate. The transfer gear meshes with multiple groups of second planetary gears and also rotates along the inner wall of the inner gear ring housing. The first planetary carrier and the transfer gear are coaxially installed, and the two have the same rotation speed. The radius of the transfer gear is smaller than the radius of the second planetary gear, realizing secondary deceleration, thereby forming a dual-speed ratio deceleration mode. The synchronous rotation of multiple groups of second planetary gears drives the second planetary carrier to rotate, and drives the load to operate through the output shaft to achieve speed reduction and torque increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional structural schematic diagram of a double-speed ratio differential planetary gear reducer is proposed for the utility model;

[0016] Figure 2 The utility model provides a schematic diagram of the disassembled three-dimensional structure of a double-speed ratio differential planetary gear reducer;

[0017] Figure 3 The utility model provides a partially disassembled three-dimensional structural schematic diagram of a double-speed ratio differential planetary gear reducer;

[0018] Figure 4 The utility model provides a schematic diagram of the exploded three-dimensional structure of a heat dissipation mechanism in a double-speed ratio differential planetary gear reducer.

[0019] Legend: 1. Base; 2. First side cover; 3. Input gear shaft; 4. Internal gear ring housing; 5. Output shaft; 6. Heat dissipation mechanism; 61. Second side cover; 62. Magnetic block; 63. Ring groove; 64. Heat dissipation gap; 65. Metal strip; 66. Pull rod; 7. First planetary gear; 8. First planetary carrier; 9. Transfer gear; 10. Second planetary gear; 11. Second planetary carrier. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0021] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure. Embodiment 1

[0022] like Figure 1-4 As shown, the utility model provides a dual-speed ratio differential planetary gear reducer, including a base 1, a first side cover 2, an input gear shaft 3, an inner gear ring shell 4 and an output shaft 5, one side of the inner gear ring shell 4 is fixedly connected with a heat dissipation mechanism 6 by bolts, the output shaft 5 is rotatably connected to the heat dissipation mechanism 6, the heat dissipation mechanism 6 includes a second side cover 61, an iron absorption block 62, a metal strip 65 and a pull rod 66, an annular groove 63 is provided on the upper outer side of the second side cover 61, a plurality of heat dissipation slits 64 are provided inside the annular groove 63, the iron absorption block 62 is fixedly connected to the end of the annular groove 63, the metal strip 65 is slidably clamped on the inner wall of the annular groove 63, the pull rod 66 is fixedly connected to the end of the metal strip 65, and the middle part of the second side cover 61 is rotatably connected to the output shaft 5 through a bearing.

[0023] The following is a detailed description of the specific settings and functions of this embodiment: when the reducer is running for a long time, the pull rod 66 is pulled, and the end of the metal strip 65 is separated from the magnetic block 62. The metal strip 65 is made of metal material and has a certain elasticity. The metal strip 65 slides in the annular groove 63, and multiple groups of heat dissipation slits 64 are exposed, connecting the inside of the body with the outside. When the multiple gears inside the body rotate, a certain amount of outward centrifugal force will be generated. The heat inside the body is discharged through the multiple groups of heat dissipation slits 64, accelerating the outward flow of hot air to achieve the purpose of heat dissipation and cooling. When the reducer is not running, the end of the metal strip 65 is attracted by the magnetic block 62, so that the metal strip 65 covers the multiple groups of heat dissipation slits 64, preventing external dust and other impurities from entering, and effectively protecting the body. Embodiment 2

[0024] like Figure 1-3 As shown, a second planetary carrier 11 is fixedly installed on the other end of the output shaft 5, and a plurality of second planetary gears 10 are rotatably connected to the other side of the second planetary carrier 11, and the plurality of second planetary gears 10 are meshedly connected to the inner wall of the inner gear ring housing 4, and a transfer gear 9 is meshedly connected in the middle of the plurality of second planetary gears 10, and a first planetary carrier 8 is fixedly installed in the middle of the transfer gear 9, and a plurality of first planetary gears 7 are rotatably connected to the other side of the first planetary carrier 8, and the plurality of first planetary gears 7 are meshedly connected to the inner wall of the inner gear ring housing 4, and the input gear shaft 3 is meshedly connected to the middle position of the plurality of first planetary gears 7, and the center points of the input gear shaft 3, the transfer gear 9 and the output shaft 5 are located on the same straight line, and the shaft portion of the input gear shaft 3 is rotatably connected to the middle portion of the first side cover 2 through a bearing, and the first side cover 2 is fixedly connected to the inner gear ring housing 4 through bolts, and the inner gear ring housing 4 is fixedly connected to the base 1.

[0025] The effect achieved by the entire embodiment is that when power is transmitted to the input gear shaft 3, the input gear shaft 3 rotates in the middle of the first side cover 2, thereby driving the multiple groups of first planetary gears 7 to rotate along the internal teeth of the inner gear ring housing 4. The radius of the gear in the input gear shaft 3 is smaller than the radius of the first planetary gear 7, thereby achieving primary deceleration. The synchronous rotation of the multiple groups of first planetary gears 7 drives the first planetary carrier 8 to rotate, thereby driving the transfer gear 9 to rotate. The transfer gear 9 engages with the multiple groups of second planetary gears 10 and also rotates along the inner wall of the inner gear ring housing 4. The first planetary carrier 8 and the transfer gear 9 are coaxially installed, and the two have the same rotation speed. The radius of the transfer gear 9 is smaller than the radius of the second planetary gear 10, thereby achieving secondary deceleration, thereby forming a dual-speed ratio deceleration mode. The synchronous rotation of the multiple groups of second planetary gears 10 drives the second planetary carrier 11 to rotate, and drives the load to operate through the output shaft 5, thereby achieving speed reduction and torque increase.

[0026] The use method and working principle of the device: When the dual-speed ratio differential planetary reducer is used, the input gear shaft 3 is connected to the power device, and the output shaft 5 is connected to the load. After the power is transmitted to the input gear shaft 3, multiple sets of first planetary gears 7 are driven to rotate along the internal teeth of the inner gear ring housing 4 to achieve primary deceleration. The synchronous rotation of multiple sets of first planetary gears 7 drives the first planetary carrier 8 to rotate, and then drives the transfer gear 9 to rotate. The transfer gear 9 engages with multiple sets of second planetary gears 10 and also rotates along the inner wall of the inner gear ring housing 4 to achieve secondary deceleration, thereby forming a dual-speed ratio deceleration mode. The synchronous rotation of multiple sets of second planetary gears 10 drives the second planetary carrier 11 to rotate, and drives the load to operate through the output shaft 5. When the reducer is running for a long time, the pull rod 66 is pulled, and the end of the metal strip 65 is separated from the magnetic block 62, so that the metal strip 65 slides in the annular groove 63, and multiple sets of heat dissipation slits 64 are exposed, connecting the inside of the body with the outside. When multiple gears inside the body rotate, a certain amount of outward centrifugal force will be generated, and the heat inside the body will be discharged through the multiple sets of heat dissipation slits 64 to accelerate heat dissipation.

[0027] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A dual-speed differential planetary gear reducer, comprising a base (1), a first side cover (2), an input gear shaft (3), an internal gear ring housing (4) and an output shaft (5), characterized in that: A heat dissipation mechanism (6) is fixedly connected to one side of the inner gear ring shell (4) by bolts, and the output shaft (5) is rotatably connected to the heat dissipation mechanism (6). The heat dissipation mechanism (6) comprises a second side cover (61), an iron absorption block (62), a metal strip (65) and a pull rod (66). An annular groove (63) is provided on the upper outer side of the second side cover (61), and a plurality of heat dissipation slits (64) are provided inside the annular groove (63). The iron absorption block (62) is fixedly connected to the end of the annular groove (63), the metal strip (65) is slidably engaged with the inner wall of the annular groove (63), and the pull rod (66) is fixedly connected to the end of the metal strip (65).

2. A dual-speed differential planetary reducer according to claim 1, characterized in that: The middle portion of the second side cover (61) is rotatably connected to the output shaft (5) via a bearing, and the other end of the output shaft (5) is fixedly mounted with a second planet carrier (11).

3. A dual-speed differential planetary reducer according to claim 2, characterized in that: The other side of the second planet carrier (11) is rotatably connected to a plurality of sets of second planetary gears (10), and the plurality of sets of second planetary gears (10) are meshingly connected to the inner wall of the internal gear ring housing (4).

4. A dual-speed differential planetary reducer according to claim 3, characterized in that: A transfer gear (9) is meshedly connected between the plurality of sets of the second planetary gears (10), and a first planet carrier (8) is fixedly mounted on the middle of the transfer gear (9).

5. A dual-speed differential planetary reducer according to claim 4, characterized in that: The other side of the first planet carrier (8) is rotatably connected to a plurality of first planet gear sets (7), and the plurality of first planet gear sets (7) are meshingly connected to the inner wall of the internal gear ring housing (4).

6. A dual-speed differential planetary reducer according to claim 5, characterized in that: The input gear shaft (3) is meshedly connected to the middle position of the plurality of sets of the first planetary gears (7), and the center points of the input gear shaft (3), the intermediate gear (9) and the output shaft (5) are located on the same straight line.

7. A dual-speed differential planetary reducer according to claim 6, characterized in that: The shaft portion of the input gear shaft (3) is rotatably connected to the middle portion of the first side cover (2) via a bearing, the first side cover (2) is fixedly connected to the inner gear ring housing (4) via bolts, and the inner gear ring housing (4) is fixedly connected to the base (1).

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