Winch speed reducer suitable for limited space

Abstract

The winch speed reducer suitable for the limited space comprises a first box body, an input shaft, a first output shaft, a transmission assembly and a planetary gear train, the input shaft is arranged at one end of the first box body, the first output shaft is arranged at the other end of the first box body, and the transmission assembly is arranged between the input shaft and the first output shaft. The transmission assembly comprises at least one group of transmission units, each transmission unit comprises a transmission shaft and a transmission idle wheel, and the input gear and the output gear are connected through the transmission idle wheel; the first box body corresponding to the first output shaft is connected with a second box body, and the planetary gear train is arranged in the second box body. The input shaft and the first output shaft are installed in the first box body in a concentrated mode and connected through the transmission idle wheel, torque is transmitted through the transmission idle wheel, speed reduction is achieved through the planetary gear train, the planetary gear train is concentrated at one end of the first box body, the size is small, and the total weight is reduced. The device can be installed in a narrow space and is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the field of special reducers for winches, in particular to a reducer for winches suitable for limited spaces. Background Art

[0002] The winch is a crucial piece of equipment for oil well hoisting operations in the petroleum industry, primarily used to control the lifting and positioning of drilling tools such as tubing and pump rods. The winch consists of a motor, a reduction gearbox, and a drum. The reduction gearbox transmits torque, controlling the drum's speed, and thus the positioning and lifting of the drilling tools within the well, ensuring safe and efficient drilling operations. Currently, the reducers on oil rig winches mostly rely on multi-stage parallel gear transmissions. However, these reducers are bulky and heavy, hindering transportation and rig weight reduction. They are also inconvenient for repair and maintenance on construction sites and cannot accommodate installation requirements in limited spaces. Summary of the Invention

[0003] In view of this, the utility model proposes a winch reducer suitable for limited space.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] The winch reducer suitable for a limited space described in the utility model includes a first housing, an input shaft, a first output shaft, a transmission assembly and a planetary gear train with a reduction ratio, the input gear on the input shaft is transmission-connected to the output gear on the first output shaft through the transmission assembly, and the first output shaft is transmission-connected to the planetary gear train; the input shaft is arranged at one end of the first housing, the first output shaft is arranged at the other end of the first housing, the transmission assembly is arranged in the first housing between the input shaft and the first output shaft, the transmission assembly includes at least one group of transmission units, the transmission unit includes a transmission shaft fixed in the first housing and a transmission idler gear rotatably arranged on the transmission shaft through a first roller bearing, the input gear and the output gear are transmission-connected via the transmission idler gear;

[0006] A second housing is connected to the first housing corresponding to the output end of the first output shaft. The planetary gear train is arranged in the second housing, which includes an inner ring gear fixed to the second housing, a sun gear, a planet carrier, a second output shaft and planetary gears arranged on the planet carrier. The sun gear is keyed to the output end of the first output shaft, each of the planetary gears is engaged with the sun gear and the inner ring gear, the planet carrier is keyed to the second output shaft, and the second output shaft is rotatably connected to the second housing through a second roller bearing.

[0007] The beneficial effect is that the input shaft and the first output shaft are centrally installed in the first housing, and the input shaft and the first output shaft are connected by a transmission idler gear, the transmission idler gear is used to transmit torque, the planetary gear train is used to achieve deceleration, and the planetary gear train is concentrated at one end of the first housing, thereby realizing a small volume of the first housing as a whole, reducing the total weight, being able to be installed in a small space, and being convenient for maintenance.

[0008] Preferably, both the first and second output shafts are splined shafts, and the planet carrier is connected to the inner end of the second output shaft via a connecting plate with internal and external splines. The output end of the second output shaft is located outside the second housing and is keyed to a flange. During actual installation, the winch drum shaft can be secured to the flange of the present invention, thereby transmitting torque to the drum.

[0009] Preferably, the two sets of transmission units are arranged in an upper and lower staggered manner, wherein the transmission idler gear of one transmission unit is engaged with the input gear, and the transmission idler gear of the other transmission unit is engaged with the output gear. In the present invention, the two transmission shafts are arranged one high and the other low, which makes the structure more compact and further reduces the volume.

[0010] Preferably, the input end of the input shaft and the output end of the second output shaft are arranged on the same side, which further ensures the installation requirements of the utility model in a limited space.

[0011] Preferably, the first roller bearing and the second roller bearing are both spherical roller bearings that can automatically align their centers.

[0012] Compared with the prior art, the present invention centrally installs the input shaft and the first output shaft in the first housing, and the input shaft and the first output shaft are connected by a transmission idler gear, the transmission idler gear is used to transmit torque, the planetary gear train is used to achieve deceleration, and the planetary gear train is concentrated at one end of the first housing, thereby realizing a small volume of the first housing as a whole, reducing the total weight, enabling installation in a small space, and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is an enlarged schematic diagram of the planetary gear train and the first output shaft in the present utility model.

[0015] Figure 3 yes Figure 1 main view.

[0016] Figure 4 yes Figure 1 rear view. DETAILED DESCRIPTION

[0017] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process. However, the protection scope of the present invention is not limited to the following embodiment.

[0018] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0019] In the description of this utility model, unless otherwise specified or limited, the terms "connected" and "connection" that may appear should be understood in a broad sense. For example, it can mean fixed connection, detachable connection, or integral connection; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium, or it can mean internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood based on specific circumstances.

[0020] like Figure 1-2 As shown, the winch reducer suitable for limited space described in the utility model includes a first housing 1, an input shaft 2, a first output shaft 3, a transmission assembly and a planetary gear train with a reduction ratio. The input gear 4 on the input shaft 2 is transmission-connected to the output gear 5 on the first output shaft 3 through the transmission assembly. The input gear 4 and the input shaft 2 are key-connected, and the first output shaft 3 and the output gear 5 are key-connected; the input shaft 2 is rotatably arranged at the left end of the first housing 1, and the first output shaft 3 is rotatably arranged at the right end of the first housing 1. The transmission assembly is arranged at the position between the input shaft 2 and the first output shaft In the first housing 1 between the output shafts 3, the transmission assembly includes two groups of transmission units, each group of transmission units includes a transmission shaft 6 fixed in the first housing 1 and a transmission idler 8 rotatably arranged on the transmission shaft 6 through a first roller bearing 7. The two transmission idler gears 8 are meshed with each other, the left transmission idler gear 8 is meshed with the input gear 4, and the right transmission idler gear 8 is meshed with the output gear 5. The input shaft 2, the transmission assembly and the first output shaft 3 form a four-stage transmission, the input shaft 2 is the first-stage shaft, the two transmission shafts 6 are the second-stage shaft and the third-stage shaft respectively, and the first output shaft 3 is the fourth-stage shaft;

[0021] A second housing 9 is connected to the first housing 1 at a position corresponding to the output end of the first output shaft 3. The planetary gear train is arranged in the second housing 9, which includes an inner ring gear 10 fixed to the second housing 9, a sun gear 11 located in the inner ring gear 10, a planet carrier 12, a second output shaft 13 and three planetary gears 14 arranged on the planet carrier 12. The sun gear 11 is keyed to the output end of the first output shaft 3 and is coaxially arranged with the first output shaft 3; the planetary gear 14 is located in the inner ring gear 10, and the planetary shaft 20 of the planetary gear 14 is connected to the planet carrier 12, and the planetary gear 14 is rotatably connected to the planetary shaft 20 through a spherical roller bearing; each planetary gear 14 is respectively meshed with the sun gear 11 and the inner ring gear 10, the planetary carrier 12 is keyed to the second output shaft 13, and the second output shaft 13 is rotatably connected to the second housing 9 through a second roller bearing 19. The sun gear 11 is key-connected to the first output shaft 3 (i.e., the fourth-stage shaft), thereby transmitting torque to the sun gear 11. The sun gear 11 meshes with the planetary gears 14, causing them to revolve along the inner ring gear 10, thereby driving the planetary carrier 12 to revolve, and the planetary carrier 12 drives the second output shaft 13 to rotate, thereby achieving torque output.

[0022] During actual installation, the first output shaft 3 and the second output shaft 13 are both spline shafts, and the planetary carrier 12 is connected to the inner end of the second output shaft 13 through a connecting plate 15 with internal splines and external splines; the output end of the second output shaft 13 is located on the outside of the second box body 9, and the output end of the second output shaft 13 is keyed to a flange 16, which can fix the winch's drum on the flange 16, and then transmit the torque to the drum to realize the rotation of the drum.

[0023] Combine Figure 1-2 It can be seen that the input end of the input shaft 2 and the output end of the second output shaft 13 are arranged on the same side, further ensuring the installation requirements of the utility model in a limited space; the inner end of the input shaft 2 is connected to the front side wall of the first box body 1 through a third roller bearing 17, and its input end is connected to the rear side wall of the first box body 1 through a cylindrical roller bearing and has an oil seal; one end of the first output shaft 3 is connected to the front side wall of the first box body 1 through a fourth roller bearing 18, and the output end of the first output shaft 3 is connected to the rear side wall of the first box body 1 through a cylindrical roller bearing, and the output end of the first output shaft 3 extends out of the first box body 1, which is convenient for installing the sun gear 11.

[0024] In actual installation, the central axis of the input shaft 2 and the central axis of the first output shaft 3 are installed at the same height, and the two transmission shafts 6 are staggered up and down (i.e. one high and one low), which makes the structure more compact and reduces the volume. Figure 3-4 .

[0025] During actual operation, external power is applied to the input shaft 2, and the input shaft 2 transmits the torque to the first output shaft 3 through the input gear 4 and the two transmission idler gears 8. The sun gear 11 is key-connected to the first output shaft 3, and the sun gear 11 rotates synchronously with the first output shaft 3. The sun gear 11 transmits the torque to the planetary carrier 12 through the planetary gear 14, and outputs the torque to the second output shaft 13 through the planetary carrier 12, which drives the winch drum to rotate through the second output shaft 13.

[0026] The utility model installs the input shaft 2, the transmission shaft 6 and the first output shaft 3 in the first housing 1, and the input shaft 2 and the first output shaft 3 are connected by a transmission idler gear 8. The transmission idler gear 8 is used to transmit torque, and the planetary gear train is used to achieve deceleration. The planetary gear train is concentrated at one end of the first housing 1, so that the first housing 1 and the first housing 1 are reduced in size as a whole, the total weight is reduced, and the first housing 1 can be installed in a small space, which is suitable for limited space; due to the small size and light weight, it is convenient to inspect and maintain.

[0027] Finally, it should be emphasized that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments without inventive effort, or replace some of the technical features therein with equivalents. Therefore, any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A winch reducer suitable for use in confined spaces, comprising a first housing, an input shaft, a first output shaft, a transmission assembly, and a planetary gear train with a reduction ratio, wherein an input gear on the input shaft is transmission-connected to an output gear on the first output shaft via the transmission assembly, and the first output shaft is transmission-connected to the planetary gear train; characterized in that: The input shaft is provided at one end of the first housing, the first output shaft is provided at the other end of the first housing, the transmission assembly is provided in the first housing between the input shaft and the first output shaft, the transmission assembly includes at least one transmission unit, the transmission unit includes a transmission shaft fixed in the first housing and a transmission idler gear rotatably provided on the transmission shaft via a first roller bearing, the input gear and the output gear are connected by transmission via the transmission idler gear; A second housing is connected to the first housing corresponding to the output end of the first output shaft. The planetary gear train is arranged in the second housing, which includes an inner ring gear fixed to the second housing, a sun gear, a planet carrier, a second output shaft and planetary gears arranged on the planet carrier. The sun gear is keyed to the output end of the first output shaft, each of the planetary gears is engaged with the sun gear and the inner ring gear, the planet carrier is keyed to the second output shaft, and the second output shaft is rotatably connected to the second housing through a second roller bearing.

2. The winch reducer suitable for limited space according to claim 1, characterized in that: The first output shaft and the second output shaft are both spline shafts, and the planetary carrier is connected to the inner end of the second output shaft through a connecting plate with internal splines and external splines; the output end of the second output shaft is located on the outside of the second box body, and the output end of the second output shaft is keyed to a flange.

3. The winch reducer suitable for limited space according to claim 1, characterized in that: The transmission assembly includes two groups of transmission units arranged in an upper and lower staggered manner, wherein the transmission idler gear of one transmission unit is engaged with the input gear, and the transmission idler gear of the other transmission unit is engaged with the output gear.

4. The winch reducer suitable for limited space according to claim 1, characterized in that: The input end of the input shaft and the output end of the second output shaft are arranged on the same side.

5. The winch reducer suitable for limited space according to claim 1, characterized in that: The first roller bearing and the second roller bearing are both spherical roller bearings.

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