Secondary speed reducing mechanism of speed reducing motor

Abstract

The utility model provides a secondary speed reducing mechanism of a speed reducing motor, and belongs to the technical field of motors. The problem that an existing mechanism is short in service life is solved. The two-stage reducing mechanism of the reducing motor comprises a machine barrel, an upper planetary mechanism and a lower planetary mechanism which are connected in series are arranged in the machine barrel, the upper planetary mechanism comprises an upper gear ring, the lower planetary mechanism comprises a lower planetary carrier and a lower gear ring, the lower planetary carrier comprises a horizontally-arranged bottom plate and a gear shaft vertically formed on the top face of the bottom plate, the upper end of the gear shaft extends into the upper gear ring, and the lower end of the gear shaft extends into the lower gear ring. An annular gasket is clamped and positioned between the upper gear ring and the lower gear ring, and the inner side edge of the annular gasket is located over the bottom plate. An annular groove with a V-shaped axial section is formed in the top face of the bottom plate and composed of a first groove side wall and a second groove side wall which are oppositely arranged, and the first groove side wall extends to the outer wall of the gear shaft. The secondary reducing mechanism of the reducing motor is long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors and relates to a reduction motor, in particular to a two-stage reduction mechanism of a reduction motor. Background Art

[0002] A reduction motor is a motor that uses the conventional operating principle of an electric motor to convert high-power and high-speed original power into low-speed and low-power mechanical energy by adjusting the ratio of the reducer and changing the speed and torque of the power machine to meet certain specific operating load requirements.

[0003] The structure of an existing reduction motor, such as a planetary reduction motor disclosed in the Chinese Patent Library (application number: 202010389127.2), includes a reduction box and a motor. At least one planetary carrier plate is provided in the reduction box, and several planetary gears are fixed on the planetary carrier plate through the axle. The rotating shaft of the motor extends into the reduction box and is linked to the planetary gears. At least two axle hole groups are provided on the planetary carrier plate, and each axle hole group includes at least three axle holes for fixing the axles. The axle holes of each axle hole group are arranged in a ring-shaped manner with the rotating shaft as the center, and the distances between the axle hole axes of different axle hole groups and the rotating shaft axes are different.

[0004] The above-mentioned reduction motor has two sets of planetary reduction mechanisms to achieve a two-stage reduction function. However, there is no isolation between the two sets of planetary reduction mechanisms, and the gear meshing will produce wear and debris, causing the waste generated by the upper planetary reduction mechanism to flow to the lower planetary reduction mechanism, aggravating the wear of the lower planetary reduction mechanism and affecting the overall life and working stability. Utility Model Content

[0005] The purpose of the utility model is to solve the above problems in the existing technology and to propose a two-stage reduction mechanism for a reduction motor with a long service life.

[0006] The objectives of the utility model can be achieved through the following technical solutions: a two-stage reduction mechanism of a reduction motor, including a barrel, an upper planetary mechanism and a lower planetary mechanism connected in series are arranged in the barrel, the upper planetary mechanism includes an upper ring gear, the lower planetary mechanism includes a lower planetary carrier and a lower ring gear, the lower planetary carrier includes a horizontally arranged base plate and a gear shaft vertically formed on the top surface of the base plate, the upper end of the gear shaft extends into the upper ring gear, and is characterized in that an annular gasket is clamped and positioned between the upper ring gear and the lower ring gear, the annular gasket is coaxially arranged with the upper ring gear, and the inner edge of the annular gasket is directly above the base plate; an annular groove with a V-shaped axial cross section is provided on the top surface of the base plate, the annular groove is composed of a groove side wall 1 and a groove side wall 2 arranged opposite to each other, and the groove side wall 1 extends to the outer wall of the gear shaft.

[0007] An annular gasket is clamped and positioned between the upper gear ring and the lower gear ring to prevent the wear waste from flowing downward at the meshing point of the upper gear ring, and an annular groove with side walls extending to the gear shaft is provided on the top surface of the bottom plate to collect and prevent the wear waste from flowing from the meshing point of the gear shaft, thereby effectively preventing the wear waste from the upper planetary mechanism from flowing to the lower planetary mechanism, slowing down the wear rate of the lower planetary mechanism, and improving the life and working stability of the reduction mechanism.

[0008] In the above-mentioned two-stage reduction mechanism of the reduction motor, a protrusion is formed on the bottom surface of the annular gasket, and a positioning groove matching the protrusion is provided on the top surface of the lower gear ring, and the protrusion is inserted into the positioning groove to limit the radial position of the annular gasket to prevent the annular gasket from shifting in position when the upper gear ring is pressed in.

[0009] In the above-mentioned two-stage reduction mechanism of the reduction motor, the protrusion and the positioning groove are both in the shape of a ring coaxial with the annular gasket, so as to enhance the radial positioning strength of the annular gasket.

[0010] In the above-mentioned two-stage reduction mechanism of the reduction motor, the inner edge of the annular gasket is located directly above the annular groove, so that the annular gasket covers part of the annular groove, which is conducive to the annular groove accumulating waste chips on the upper side of the annular gasket.

[0011] In the above-mentioned two-stage reduction mechanism of the reduction motor, a ring-shaped positioning seat is formed on the inner wall of the barrel, and the positioning seat is coaxially arranged with the barrel; the outer wall of the lower gear ring has a limiting portion that presses against the top surface of the positioning seat, which plays an installation limiting role, so that the lower gear ring can be pressed into place at one time, which is convenient for assembly.

[0012] In the above-mentioned two-stage reduction mechanism of the reduction motor, an annular step is formed on the outer wall of the lower gear ring, and the annular step is composed of an annular bottom surface and an annular side surface; the limiting portion is a circle of protrusions formed on the annular bottom surface, and the circle of protrusions is distributed at intervals along the circumference of the lower gear ring.

[0013] In the above-mentioned two-stage reduction mechanism of the reduction motor, an interference fit is formed between the boss and the inner wall of the barrel to enhance the connection strength between the lower gear ring and the barrel.

[0014] Compared with the existing technology, the two-stage reduction mechanism of the reduction motor has the following advantages:

[0015] 1. The annular gasket is clamped and positioned between the upper gear ring and the lower gear ring to prevent the wear debris at the meshing point of the upper gear ring from flowing downward. An annular groove with side walls extending to the gear shaft is provided on the top surface of the bottom plate to collect and prevent the wear debris at the meshing point of the gear shaft, thereby effectively preventing the wear debris at the upper planetary mechanism from flowing to the lower planetary mechanism, slowing down the wear rate of the lower planetary mechanism, and improving the life and working stability of the reduction mechanism.

[0016] 2. The protrusion is inserted into the positioning groove to limit the radial position of the annular gasket to prevent the annular gasket from shifting when the upper gear ring is pressed in. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of this reduction motor.

[0018] Figure 2 This is a cross-sectional schematic diagram of the reduction motor.

[0019] Figure 3 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0020] Figure 4 It is a three-dimensional schematic diagram of the lower ring gear.

[0021] In the figure, 1, barrel; 1a, positioning seat; 2, upper ring gear; 3, lower planetary carrier; 3a, bottom plate; 3a1, annular groove; 3a2, groove side wall 1; 3b, gear shaft; 4, lower ring gear; 4a, annular step; 4b, boss; 5, annular gasket; 5a, bump. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 2 As shown, the secondary reduction mechanism of the reduction motor includes a barrel 1, in which an upper planetary mechanism and a lower planetary mechanism connected in series are provided. The structures of the upper planetary mechanism and the lower planetary mechanism are similar to those of a traditional planetary gear reduction mechanism, and are not described in detail here.

[0024] Specifically,

[0025] The upper planetary mechanism includes an upper ring gear 2, which is coaxially arranged with the barrel 1. The lower planetary mechanism includes a lower planetary carrier 3 and a lower ring gear 4, which is also coaxially arranged with the barrel 1. The lower planetary carrier 3 includes a horizontally arranged base plate 3a and a pinion 3b vertically formed on the top surface of the base plate 3a. The upper end of the pinion 3b extends into the upper ring gear 2 and meshes with the planetary gears of the upper planetary mechanism. The lower planetary carrier 3 is preferably a cast integral component.

[0026] like Figure 2 and Figure 3 As shown, an annular gasket 5 is clamped and positioned between the upper ring gear 2 and the lower ring gear 4. The annular gasket 5 is coaxially arranged with the upper ring gear 2, with its inner edge directly above the bottom plate 3a. The top surface of the bottom plate 3a defines an annular groove 3a1 with a V-shaped axial cross-section. The annular groove 3a1 is coaxial with the gear shaft 3b and consists of opposing sidewalls 1 and 2, with sidewall 1 3a2 extending to the outer wall of the gear shaft 3b.

[0027] An annular gasket 5 is clamped and positioned between the upper ring gear 2 and the lower ring gear 4 to prevent wear waste from flowing downward at the meshing point of the upper ring gear 2, and an annular groove 3a1 with side walls extending to the gear shaft 3b is provided on the top surface of the bottom plate 3a to collect and prevent wear waste from the meshing point of the gear shaft 3b, thereby effectively preventing wear waste from the upper planetary mechanism from flowing to the lower planetary mechanism, slowing down the wear rate of the lower planetary mechanism, and improving the life and working stability of the reduction mechanism.

[0028] To further illustrate, a protrusion 5a is formed on the bottom surface of the annular gasket 5, and a positioning groove is provided on the top surface of the lower ring gear 4 to match the protrusion 5a. The protrusion 5a is inserted into the positioning groove to radially limit the annular gasket 5 and prevent the annular gasket 5 from shifting when the upper ring gear 2 is pressed into place. Preferably, the protrusion 5a and the positioning groove are both annular and coaxial with the annular gasket 5 to enhance the radial positioning strength of the annular gasket 5.

[0029] In this embodiment,

[0030] The outer walls of both the upper and lower ring gears 2 and 4 form an interference fit with the inner wall of the barrel 1. An annular locating seat 1a is formed on the inner wall of the barrel 1 and is coaxially arranged with the barrel 1. The outer wall of the lower ring gear 4 has a stopper that presses against the top surface of the locating seat 1a, acting as a mounting limiter, allowing the lower ring gear 4 to be pressed into place at once, facilitating assembly.

[0031] like Figure 2 and Figure 4 As shown, the specific structure of the limiting portion is as follows: an annular step 4a is formed on the outer wall of the lower gear ring 4, and the annular step 4a is composed of an annular bottom surface and an annular side surface. The limiting portion is a circle of protrusions 4b formed on the annular bottom surface, and the circle of protrusions 4b is spaced apart along the circumference of the lower gear ring 4. Of course, the limiting portion can also be directly formed as the annular bottom surface.

[0032] To further illustrate, an interference fit is formed between the boss 4 b and the inner wall of the barrel 1 to enhance the connection strength between the lower gear ring 4 and the barrel 1 .

[0033] In actual products, the inner edge of the annular gasket 5 is located directly above the annular groove 3a1 , so that the annular gasket 5 partially blocks the annular groove 3a1 , which helps the annular groove 3a1 accumulate waste chips on the upper side of the annular gasket 5 .

[0034] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A two-stage reduction mechanism of a reduction motor, comprising a barrel (1), wherein an upper planetary mechanism and a lower planetary mechanism connected in series are provided in the barrel (1), wherein the upper planetary mechanism comprises an upper ring gear (2), and the lower planetary mechanism comprises a lower planetary carrier (3) and a lower ring gear (4), wherein the lower planetary carrier (3) comprises a horizontally arranged bottom plate (3a) and a gear shaft (3b) vertically formed on the top surface of the bottom plate (3a), wherein the upper end of the gear shaft (3b) extends into the upper ring gear (2), and wherein the lower planetary carrier (3) comprises a horizontally arranged bottom plate (3a) and a gear shaft (3b) vertically formed on the top surface of the bottom plate (3a), and wherein the upper end of the gear shaft (3b) extends into the upper ring gear (2), and wherein the lower planetary mechanism comprises a lower planetary carrier (3) and a lower ring gear (4). An annular gasket (5) is clamped and positioned between the upper gear ring (2) and the lower gear ring (4), the annular gasket (5) is coaxially arranged with the upper gear ring (2), and the inner edge of the annular gasket (5) is located directly above the bottom plate (3a); An annular groove (3a1) having a V-shaped axial cross-section is provided on the top surface of the bottom plate (3a). The annular groove (3a1) is composed of a first groove side wall (3a2) and a second groove side wall that are arranged opposite to each other, and the first groove side wall (3a2) extends to the outer wall of the gear shaft (3b).

2. The two-stage reduction mechanism of the reduction motor according to claim 1, characterized in that: A bulge (5a) is formed on the bottom surface of the annular gasket (5), and a positioning groove matching the bulge (5a) is provided on the top surface of the lower gear ring (4), and the bulge (5a) is inserted into the positioning groove.

3. The two-stage reduction mechanism of the reduction motor according to claim 2, characterized in that: The protrusion (5a) and the positioning groove are both in the shape of an annulus coaxial with the annular gasket (5).

4. The two-stage reduction mechanism of the reduction motor according to claim 1, 2 or 3, characterized in that: The inner edge of the annular gasket (5) is located directly above the annular groove (3a1).

5. The two-stage reduction mechanism of the reduction motor according to claim 1, characterized in that: An annular positioning seat (1a) is formed on the inner wall of the barrel (1), and the positioning seat (1a) is coaxially arranged with the barrel (1); and a limiting portion is provided on the outer wall of the lower gear ring (4) to press against the top surface of the positioning seat (1a).

6. The two-stage reduction mechanism of the reduction motor according to claim 5, characterized in that: An annular step (4a) is formed on the outer wall of the lower gear ring (4), and the annular step (4a) is composed of an annular bottom surface and an annular side surface; the limiting portion is a circle of protruding columns (4b) formed on the annular bottom surface, and the circle of protruding columns (4b) are distributed at intervals along the circumference of the lower gear ring (4).

7. The two-stage reduction mechanism of the reduction motor according to claim 6, characterized in that: An interference fit is formed between the boss (4b) and the inner wall of the barrel (1).

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