Gear reducer

Abstract

The utility model relates to the technical field of speed reducers, and discloses a gear speed reducer which comprises a shell assembly, a planetary gear assembly is installed in the shell assembly, an input shaft and an output shaft which are connected with a planetary gear extend out of the shell assembly, the shell assembly comprises a machine shell and an end cover, and the end cover is installed on an opening of the machine shell in a matched mode. An oil outlet is formed in the bottom face of a cavity of the machine shell, an oil plug is installed in the oil outlet in a matched mode, and the oil plug is provided with a storage cavity and a groove hole communicated with the storage cavity. When the gear reducer stops working, chippings generated by the planetary gear assembly are precipitated below the cavity in lubricating oil, the chippings falling on the bottom face of the cavity of the machine shell enter the interior of the plug body through the groove hole to be stored, the chippings stored in the plug body are not affected by flowing lubricating liquid, and therefore the chippings can be prevented from falling into the cavity of the machine shell. And therefore, chippings in the flowing lubricating liquid are reduced.

Description

Technical Field

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

[0002] A speed reducer is a power transmission mechanism. Among the currently used mechanisms for transmitting power and motion, speed reducers are widely used in fields such as metallurgy, mining, hoisting, transportation, cement, construction, chemical industry, textile, printing and dyeing, and pharmaceutical industries.

[0003] A speed reducer is generally used for transmission equipment with low speed and large torque. It reduces the speed by meshing a gear with fewer teeth on the input shaft of the speed reducer with a large gear on the output shaft to transmit the power of an electric motor, internal combustion engine, or other high-speed rotating power source.

[0004] Inside the gear speed reducer, multiple groups of gears mesh with each other for transmission. The gears will be squeezed against each other to achieve power transmission. During the squeezing process, the edges of the gears are prone to breakage and generate metal debris, which flows along with the lubricating fluid. After the flowing debris enters the meshing surface of the gears, it is likely to cause damage to the meshing surface. Summary of the Utility Model

[0005] To solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] The utility model provides a gear speed reducer, which includes a housing assembly. A planetary gear assembly is installed inside the housing assembly. The input shaft and the output shaft connected to the planetary gear both extend out of the housing assembly. The housing assembly includes a housing and an end cover. The opening of the housing is fitted with the end cover. An oil outlet is opened on the bottom surface of the cavity of the housing, and an oil plug is fitted inside the oil outlet. The oil plug has a storage cavity and a slot hole communicating with the storage cavity.

[0007] Lubricating oil is stored inside the housing assembly. An oil inlet is provided at the top of the housing, and the oil inlet is sealed by a sealing plug. Oil is injected through the oil inlet;

[0008] The sealing plug is a cylindrical structure with external threads, and the oil injection port has internal threads. Sealing is achieved through threaded connection;

[0009] During the operation of the gear speed reducer, the debris generated by the planetary gear assembly precipitates to the lower part of the cavity in the lubricating oil and falls into the inside of the oil plug through the slot hole, thereby reducing the content of debris in the lubricating oil.

[0010] Further, the oil plug includes a cap body and a plug body. The plug body is a cylindrical structure. The cap body is fitted on the opening of the plug body, and a slot hole communicating with the inside of the plug body is opened on the side surface of the cap body.

[0011] Both the cap body and the plug body are made of stainless steel materials. When the gear reducer stops working, the debris generated by the planetary gear assembly precipitates in the lubricating oil to the lower part of the cavity. The debris falling on the bottom surface of the cavity of the machine housing enters the inside of the plug body through the slot holes for storage. The debris stored in the plug body is not affected by the flowing lubricating fluid, thereby reducing the debris in the flowing lubricating fluid.

[0012] Further, a tapered opening is provided inside the opening of the plug body, so as to enable the debris to enter the slot hole along the tapered opening.

[0013] Further, an inner ring body is provided on the inner wall of the oil outlet, a tapered surface is provided at the upper port of the oil outlet, an outer ring body is provided on the outer side surface of the plug body, the port provided with the outer ring body extends into the oil outlet, and at the same time, the inner ring body and the outer ring body are in limit cooperation. A ring body is sleeved at the bottom end of the plug body, and the ring body is fitted and installed in the oil outlet to press the inner ring body against the outer ring body.

[0014] During the installation or maintenance process, the plug body is installed or removed by installing or removing the ring body;

[0015] External threads are provided on the outer side surface of the ring body, internal threads are provided inside the bottom end of the inner ring body, and the ring body is installed inside the inner ring body through thread cooperation. During installation, the inner ring body is pressed against the outer ring body through the outer ring body to achieve sealing;

[0016] External threads are provided at the bottom end of the cap body, and the bottom end of the cap body is installed in a stepped hole provided in the middle of the tapered opening through threads.

[0017] Further, the bottom end of the tapered surface extends to the upper surface of the inner ring body, and the upper surface of the inner ring body is flush with the bottom surface of the slot hole, which is convenient for realizing the flow of the debris.

[0018] Further, the planetary gear assembly includes a driven gear, a transmission gear and a driving gear. The driven gear is an annular gear, a driving gear is provided inside the driven gear, the driving gear is drivingly connected to the driven gear through a plurality of transmission gears, an output shaft is connected to the middle of the driven gear, and an input shaft is installed in the middle of the driving gear. The driving gear, the transmission gear and the driving gear are used to realize speed reduction transmission;

[0019] The driven gear and the output shaft rotate synchronously, and the driving gear and the input shaft rotate synchronously.

[0020] The utility model has the following beneficial effects:

[0021] (1) When the gear reducer of the utility model stops working, the debris generated by the planetary gear assembly precipitates in the lubricating oil to the lower part of the cavity. The debris falling on the bottom surface of the cavity of the machine housing enters the inside of the plug body through the slot holes for storage. The debris stored in the plug body is not affected by the flowing lubricating fluid, thereby reducing the debris in the flowing lubricating fluid.

[0022] Of course, it is not necessary for any product implementing the present utility model to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is a schematic sectional structure diagram of the present utility model;

[0026] Figure 3 is of the present utility model Figure 2 magnified schematic structural diagram of part A;

[0027] Figure 4 is an exploded schematic structural diagram of the present utility model;

[0028] Figure 5 is a schematic structural diagram of the housing of the present utility model;

[0029] Figure 6 is an exploded schematic structural diagram of the oil plug of the present utility model;

[0030] Figure 7 is of the present utility model Figure 6 sectional structure schematic diagram;

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] In the figure: 1, housing; 101, oil outlet; 102, inner ring body; 103, conical surface; 2, end cover; 3, driven gear; 4, transmission gear; 5, driving gear; 6, input shaft; 7, output shaft; 8, oil plug; 801, cap body; 8011, slot hole; 802, plug body; 8021, conical opening; 8022, outer ring body; 803, ring body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some, rather than all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0034] Please refer to Figures 1-7 As shown, the utility model relates to a gear reducer, which comprises a housing assembly. A planetary gear assembly is installed inside the housing assembly. The input shaft 6 and the output shaft 7 connected to the planetary gear both extend out of the housing assembly. The housing assembly includes a housing 1 and an end cover 2. The opening of the housing 1 is fitted with the end cover 2 in a matching manner. An oil outlet 101 is opened on the bottom surface of the cavity of the housing 1. An oil plug 8 is fitted inside the oil outlet 101. The oil plug 8 has a storage cavity and a slot 8011 communicating with the storage cavity.

[0035] The housing assembly stores lubricating oil. An oil inlet is provided at the top of the housing 1 and is sealed by a sealing plug. Oil is injected through the oil inlet;

[0036] The sealing plug is a cylindrical structure with an external thread, and the oil injection port is provided with an internal thread, and the sealing is achieved through threaded connection;

[0037] During the operation of the gear reducer, the debris generated by the planetary gear assembly precipitates in the lubricating oil to the lower part of the cavity and falls into the inside of the oil plug 8 through the slot 8011, thereby reducing the content of debris in the lubricating oil.

[0038] The oil plug 8 includes a cap body 801 and a plug body 802. The plug body 802 is a cylindrical structure. The cap body 801 is fitted on the opening of the plug body 802. A slot 8011 communicating with the inside of the plug body 802 is opened on the side surface of the cap body 801.

[0039] Both the cap body 801 and the plug body 802 are made of stainless steel material. When the gear reducer stops working, the debris generated by the planetary gear assembly precipitates in the lubricating oil to the lower part of the cavity. The debris falling on the bottom surface of the cavity of the housing 1 enters the inside of the plug body 802 through the slot 8011 for storage. The debris stored in the plug body 802 is not affected by the flowing lubricating fluid, thereby reducing the debris in the flowing lubricating fluid.

[0040] A conical opening 8021 is provided on the inner side of the opening of the plug body 802, so that the debris enters the slot 8011 along the conical opening 8021.

[0041] An inner ring body 102 is provided on the inner wall of the oil outlet 101, and a conical surface 103 is provided at the upper port of the oil outlet 101. An outer ring body 8022 is provided on the outer side surface of the plug body 802. The port provided with the outer ring body 8022 extends into the oil outlet 101. At the same time, the inner ring body 102 and the outer ring body 8022 are in limit fit. A ring body 803 is sleeved at the bottom end of the plug body 802. The ring body 803 is fitted inside the oil outlet 101 to realize the outer ring body 8022 pressing the inner ring body 102.

[0042] During the installation or maintenance process, the installation or disassembly of the plug body 802 is realized by installing or disassembling the ring body 803;

[0043] The outer side surface of the annular body 803 is provided with an external thread, and the inner bottom end of the inner annular body 102 is provided with an internal thread. The annular body 803 is installed in the inner annular body 102 through thread fit. During installation, the inner annular body 102 is pressed tightly by the outer annular body 8022 to achieve sealing;

[0044] The bottom end of the cap body 801 is provided with an external thread, and the bottom end of the cap body 801 is installed in a stepped hole provided in the middle of the conical opening 8021 through threads.

[0045] The bottom end of the conical surface 103 extends to the upper surface of the inner annular body 102, and the upper surface of the inner annular body 102 is flush with the bottom surface of the slot hole 8011, which is convenient for realizing the flow of debris.

[0046] The planetary gear assembly includes a driven gear 3, a transmission gear 4, and a driving gear 5. The driven gear 3 is an annular gear. The driving gear 5 is arranged inside the driven gear 3. The driving gear 5 is drivingly connected to the driven gear 3 through a plurality of transmission gears 4. An output shaft 7 is connected to the middle of the driven gear 3, and an input shaft 6 is installed in the middle of the driving gear 5. The speed reduction transmission is realized through the driven gear 3, the transmission gear 4, and the driving gear 5;

[0047] The driven gear 3 and the output shaft 7 rotate synchronously, and the driving gear 5 and the input shaft 6 rotate synchronously.

[0048] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A gear speed reducer, comprising a housing assembly, wherein a planetary gear assembly is installed inside the housing assembly, and an input shaft (6) and an output shaft (7) connected to the planetary gear both extend out of the housing assembly. It is characterized in that: The housing assembly includes a housing (1) and an end cover (2), and the opening of the housing (1) is fitted with the end cover (2) in a matching manner; An oil outlet (101) is opened on the bottom surface of the cavity of the housing (1), and an oil plug (8) is fitted in the oil outlet (101); The oil plug (8) has a storage cavity and a slot hole (8011) communicating with the storage cavity.

2. The gear speed reducer according to claim 1, wherein: The oil plug (8) includes a cap body (801) and a plug body (802); The plug body (802) is of a cylindrical structure, the cap body (801) is fitted on the opening of the plug body (802), and a slot hole (8011) communicating with the inside of the plug body (802) is opened on the side surface of the cap body (801).

3. A gear reducer according to claim 2, characterized in that: A conical opening (8021) is provided on the inner side of the opening of the plug body (802).

4. A gear speed reducer according to claim 2, characterized in that: An inner ring body (102) is provided on the inner wall of the oil outlet (101), and a conical surface (103) is provided at the upper port of the oil outlet (101); An outer ring body (8022) is provided on the outer side surface of the plug body (802), and the port provided with the outer ring body (8022) extends into the oil outlet (101), and at the same time, the inner ring body (102) and the outer ring body (8022) are in limiting fit; A ring body (803) is sleeved at the bottom end of the plug body (802), and the ring body (803) is fitted in the oil outlet (101) to realize the outer ring body (8022) pressing the inner ring body (102).

5. A gear speed reducer according to claim 4, characterized in that: The bottom end of the conical surface (103) extends to the upper surface of the inner ring body (102); The upper surface of the inner ring body (102) is flush with the bottom surface of the slot hole (8011).

6. A gear speed reducer according to claim 1, characterized in that: The planetary gear assembly includes a driven gear (3), a transmission gear (4) and a driving gear (5); The driven gear (3) is an annular gear, a driving gear (5) is provided inside the driven gear (3), and the driving gear (5) is drivingly connected to the driven gear (3) through a plurality of transmission gears (4); The middle part of the driven gear (3) is connected with an output shaft (7); The middle part of the driving gear (5) is provided with an input shaft (6).

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