WO2024066558A1 - 割草机行走轮用驱动减速传动机构 - Google Patents
割草机行走轮用驱动减速传动机构 Download PDFInfo
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- WO2024066558A1 WO2024066558A1 PCT/CN2023/103218 CN2023103218W WO2024066558A1 WO 2024066558 A1 WO2024066558 A1 WO 2024066558A1 CN 2023103218 W CN2023103218 W CN 2023103218W WO 2024066558 A1 WO2024066558 A1 WO 2024066558A1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
- A01D69/06—Gearings
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- the invention belongs to a reduction transmission mechanism, and in particular relates to a driving reduction transmission mechanism for a lawn mower walking wheel.
- lawn mowers are generally used to reduce the burden on garden workers.
- the working mode of lawn mowers is mostly that the motor is powered by a variable speed reduction box and a clutch to drive the walking wheel.
- a Chinese patent application with publication number CN213404193U discloses a driving device of a lawn mower and a closed structure of the driving device.
- the patent includes a reduction box and a motor housing, as well as a planetary gear set and a transmission member arranged in the reduction box.
- the motor housing is directly connected to the reduction box, the motor shaft is coaxially connected to the sun gear of the planetary gear set, the transmission member is connected to the small planetary gear, the mounting port of the motor housing and the upper and lower openings of the reduction box are each provided with a barrier member to limit the blockage, and a ventilation duct for heat dissipation is left between the barrier member between the motor housing and the reduction box.
- the motor selected is usually a low-speed, high-torque motor.
- the result of using this type of motor is that the motor is large in size, uses a lot of materials, and is costly, so it is difficult to reduce the thickness and cost of the entire machine, and the output torque will also be limited; a small motor is required to cooperate with a reduction mechanism to increase the torque, and the reduction mechanism usually has multi-stage transmission and a long axial length, which further increases the volume.
- the object of the present invention is to provide a driving reduction transmission mechanism for a lawn mower walking wheel, which solves the problems of large volume, high cost, and limited output torque in the prior art.
- a driving reduction transmission mechanism for a lawn mower walking wheel comprising an input shaft, a first planetary carrier coaxially arranged with the input shaft is provided on the circumferential outer side of the input shaft, the input shaft can rotate around the axis, an output section extending outward through the first planetary carrier and coaxially arranged with the input shaft is provided on the end face of the input shaft, a second planetary carrier coaxially arranged with the output section is provided on the circumferential outer side of the output section, a sun gear coaxially arranged with the output section is provided on the end of the output section, a first planetary gear meshing with the sun gear is provided inside the second planetary carrier, a fixed gear ring meshing with the first planetary gear and coaxially arranged with the second planetary carrier is provided on the circumferential outer side of the second planetary carrier,
- the second planet carrier is drivingly connected to the output ring gear outside the first planet carrier; the above-mentioned first
- an input cavity for accommodating the input shaft is provided on the end face of the first planetary carrier, and at least one first bearing connected to the outer wall of the input shaft is provided on the inner wall of the input cavity; the input cavity of the above-mentioned first planetary carrier can accommodate the input shaft and ensure the rotation of the input shaft, and the provision of the first bearing enhances the stability and smoothness of the rotation of the input shaft.
- the second planetary carrier includes a transmission frame for fixing the first planetary gear
- the transmission frame is coaxially arranged with the input shaft, and the side wall of the transmission frame is connected to the first planetary carrier via at least one second bearing; the arrangement of the above transmission frame can support and fix the first planetary gear to ensure stable transmission of the first planetary gear, and at the same time can rotate around the axis of the input shaft through the second bearing to form transmission with the output ring gear.
- a first transmission chamber for accommodating a sun gear and a first planetary gear is provided inside the transmission frame, the sun gear is coaxially arranged with the second planetary frame, the first planetary gear is arranged on the circumferential side of the sun gear, and the axle of the first planetary gear is connected to the second planetary frame;
- the setting of the above-mentioned first transmission chamber can accommodate the first planetary gear and the sun gear, so that the first planetary gear and the sun gear are both located inside the first planetary frame, thereby reducing the space occupied by the first planetary gear and the sun gear, shortening the axial length of the mechanism, reducing the volume, and at the same time, through the cooperation of the first planetary gear and the sun gear, stable transmission of the transmission frame can be achieved.
- an end cover fixedly connected to the first planetary carrier is provided on the circumferential outer side of the second planetary carrier, the fixed ring gear is provided between the first planetary carrier and the end cover and fixedly connected to the second planetary carrier, and the first planetary gear is provided on the inner side of the fixed ring gear and meshes with the fixed ring gear for transmission;
- the above-mentioned end cover is fixedly connected to the first planetary carrier, and the fixed ring gear is fixed between the first planetary carrier and the end cover, and the first planetary gear is meshed with the fixed ring gear, so that the transmission of the sun gear to the first planetary gear and the meshing of the first planetary gear with the fixed ring gear can drive the second planetary carrier to rotate around the axis of the input shaft, thereby reducing the axial length of the mechanism while achieving stable transmission of the second planetary carrier.
- the second planetary carrier includes a transmission cylinder connected to the transmission frame and sleeved on the circumferential side of the output section, at least one second planetary gear is provided on the circumferential side of the transmission cylinder, and the side wall of the transmission cylinder can be meshed with the second planetary gear for transmission; the arrangement of the above-mentioned transmission cylinder can realize the rotation of the transmission cylinder by the rotation of the transmission frame, and the second planetary gear can be rotated through the transmission of the transmission cylinder, so that the output ring gear can be stably transmitted to realize the effect of multi-stage reduction transmission.
- a second transmission chamber is provided on the first planetary carrier corresponding to the outer side of the transmission cylinder, the second planetary gear is provided in the second transmission chamber, and the axle of the second planetary gear is fixedly connected to the second transmission chamber; the setting of the above-mentioned second transmission chamber can accommodate the second planetary gear, increase the accommodating space of the second planetary gear, provide stable support for the transmission of the second planetary gear, further shorten the axial length of the mechanism, reduce the volume, and at the same time ensure the stability of the reduction transmission function.
- an output ring gear rotatable around the axis of the input shaft is provided on the side wall of the first planetary carrier, and the output ring gear is connected to the side wall of the first planetary carrier via at least one third bearing, and the inner side of the output ring gear is meshed with the second planetary gear for transmission; the above-mentioned output ring gear can be rotated by the transmission of the second planetary gear, and can be rotated on the first planetary carrier via the third bearing, which effectively ensures the effect of stable transmission.
- the present invention has the characteristics of shortening the axial length of the mechanism, ensuring low speed and high torque of the motor, reducing the overall volume of the mechanism, reducing costs, and reducing the limitation of output torque.
- FIG. 1 is a schematic structural diagram of the present invention.
- a driving reduction transmission mechanism for a lawn mower travel wheel comprises an input shaft 1, a first planet carrier 2 coaxially arranged with the input shaft 1 is provided on the circumferential outer side of the input shaft 1, the input shaft 1 can rotate around the axis, an output section 11 extending outward through the first planet carrier 2 and coaxially arranged with the input shaft 1 is provided on the end face of the input shaft 1, a second planet carrier 3 coaxially arranged with the output section 11 is provided on the circumferential outer side of the output section 11, a sun gear 12 coaxially arranged with the output section 11 is provided at the end of the output section 11, a first planet gear 31 meshing with the sun gear 12 is provided inside the second planet carrier 3, a fixed gear ring 33 meshing with the first planet gear 31 and coaxially arranged with the second planet carrier 3 is provided on the circumferential outer side of the second planet carrier 3, the second planet carrier 3 is drivingly connected with the output gear ring 4 outside the first planet carrier 2, an input cavity 21 for accommodating the input shaft 1 is provided
- the above-mentioned input shaft is connected to the output shaft of the external driving member, so that the input shaft rotates, and the first planetary carrier fixes the position of the input shaft, and the first planetary carrier can rotate around the axis of the input shaft.
- the output section of the input shaft drives the sun gear located in the second planetary carrier to rotate synchronously, and the rotation of the sun gear can drive the first planetary gear to rotate, and the first planetary gear is respectively meshed with the fixed ring gear and the sun gear for transmission, and the fixed ring gear is coaxially arranged with the sun gear. Therefore, when the sun gear drives the first planetary gear to rotate, the first planetary gear rotates along the meshing teeth of the fixed ring gear.
- the fixed ring gear Since the fixed ring gear is fixed and does not rotate, when the first planetary gear rotates, it will drive the second planetary carrier to rotate synchronously around the axis of the sun gear, and the output ring gear rotates synchronously with the rotation of the second planetary carrier.
- the second planetary carrier 3 includes a transmission frame 32 for fixing the first planetary gear 31, the transmission frame 32 is coaxially arranged with the input shaft 1, the side wall of the transmission frame 32 is connected to the first planetary carrier 2 through at least one second bearing 13, a first transmission chamber 321 for accommodating the sun gear 12 and the first planetary gear 31 is provided inside the transmission frame 32, the sun gear 12 is coaxially arranged with the second planetary carrier 3, the first planetary gear 31 is arranged on the circumferential side of the sun gear 12, the axle of the first planetary gear 31 is connected to the second planetary carrier 3, an end cover 5 fixedly connected to the first planetary carrier 2 is provided on the circumferential outer side of the second planetary carrier 3, a fixed ring gear 33 is arranged between the first planetary carrier 2 and the end cover 5 and is fixedly connected to the second planetary carrier 2, and the first planetary gear 31 is arranged on the inner side of the fixed ring gear 33 and meshes with the fixed ring gear 33 for transmission.
- the transmission frame is directly connected to the transmission cylinder, and the transmission cylinder is sleeved on the circumference of the output section of the input shaft and has no direct contact with the input shaft.
- the transmission frame can rotate on the inner side of the first planetary frame through the second bearing.
- the first planetary gear rotates in the first transmission cavity and maintains engagement with the sun gear.
- the end cover forms a seal on the first planetary frame, and the end cover, the fixed gear ring and the first planetary frame are connected and fixed in sequence by bolts. When the first planetary gear rotates, it will rotate along the inner ring of the fixed gear ring fixed on the first planetary frame while revolving around the sun gear.
- the second planetary carrier 3 includes a transmission cylinder 34 connected to the transmission frame 32 and sleeved on the circumferential side of the output section 11. At least one second planetary gear 23 is provided on the circumferential side of the transmission cylinder 34. The side wall of the transmission cylinder 34 can mesh with the second planetary gear 23 for transmission.
- a second transmission cavity 22 is provided on the first planetary carrier 2 corresponding to the outer side of the transmission cylinder 34.
- the second planetary gear 23 is arranged in the second transmission cavity 22.
- the axle of the second planetary gear 23 is fixedly connected to the second transmission cavity 22.
- An output ring gear 4 that can rotate around the axis of the input shaft 1 is provided on the side wall of the first planetary carrier 2.
- the output ring gear 4 is connected to the side wall of the first planetary carrier 2 through at least one third bearing 41, and the inner side of the output ring gear 4 meshes with the second planetary gear 23 for transmission.
- the above-mentioned transmission cylinder is sleeved on the circumferential side of the output section of the input shaft, and the side wall of the transmission cylinder is provided with meshing teeth meshing with the second planetary gear, which can drive the second planetary gear to rotate.
- the transmission frame rotates around the axis of the input section under the cooperation of the first planetary gear and the fixed ring gear.
- the transmission cylinder wall rotates as the transmission frame rotates, and the rotation of the transmission cylinder drives the second planetary gear to rotate around the axis of the input shaft.
- the second planetary gear is meshed with the output ring gear for transmission.
- the sun gear, the first planetary gear, the second planetary gear and the transmission cylinder are all located in the first planetary carrier and the second planetary carrier, which effectively shortens the axial length of the mechanism and reduces the volume of the mechanism.
Abstract
本发明涉及一种割草机行走轮用驱动减速传动机构，包括输入轴，所述输入轴的圆周外侧设有与输入轴同轴设置的第一行星架，所述输入轴可绕轴线转动，所述输入轴的端面上设有穿过第一行星架朝外延伸且与输入轴同轴设置的输出段，所述输出段的圆周外侧设有与输出段同轴设置的第二行星架，所述输出段的端部设有与输出段同轴设置的太阳轮，所述第二行星架内部设有与太阳轮啮合传动的第一行星轮，所述第二行星架的圆周外侧设有固定齿圈，所述第二行星架与第一行星架外部的输出齿圈传动连接。本发明具有可缩短机构的轴向长度，保证电机低转速和高扭矩的同时，减小机构的整体体积，降低成本，降低输出扭矩的限制等特点。
Description
本发明属于一种减速传动机构，具体涉及一种割草机行走轮用驱动减速传动机构。
随着城市绿化的发展，草坪、花园的面积有所增加，对于草坪的修剪、保养，现在一般都采用割草机以减轻园林工人的负担，割草机的工作方式大都为电机带电变速减速箱、离合器驱动行走轮。
公开号为CN213404193U的中国专利申请中公开了一种割草机的驱动装置及驱动装置的封闭结构，该专利包括减速箱和电机壳体，以及设于减速箱内的行星齿轮组和传动件，电机壳体直接的连接在减速箱上，电机轴与行星齿轮组的太阳齿轮同轴连接，传动件连接小行星齿，电机壳体的安装口及减速箱的上下开口处各设有阻隔件限位封堵，且电机壳体与减速箱间的阻隔件间留有用于散热的通风道。
该专利中，由于行走轮需要带动整个割草机行走，因此需要较大的扭矩，因此选用的电机通常为低转速，高扭矩的电机，然而，选用这类电机带来的结果就是电机体积大，用料多，成本高，从而整机厚度和成本难以降低，输出扭矩也会受限；需要体积小的电机与减速机构配合来提升扭矩，然后减速机构通常多级传动，轴向长度较长，导致体积进一步增加。
本发明目的在于提供一种割草机行走轮用驱动减速传动机构，解决了现有技术存在的体积大、成本高，输出扭矩受限等问题。
本发明的上述技术目的主要是通过以下技术方案解决的：一种割草机行走轮用驱动减速传动机构，包括输入轴，所述输入轴的圆周外侧设有与输入轴同轴设置的第一行星架，所述输入轴可绕轴线转动，所述输入轴的端面上设有穿过第一行星架朝外延伸且与输入轴同轴设置的输出段，所述输出段的圆周外侧设有与输出段同轴设置的第二行星架，所述输出段的端部设有与输出段同轴设置的太阳轮，所述第二行星架内部设有与太阳轮啮合传动的第一行星轮，所述第二行星架的圆周外侧设有与第一行星轮啮合传动且与第二行星架同轴设置的固定齿圈，所述第二行星架与第一行星架外部的输出齿圈传动连接；上述第一行星架可对输入轴进行固定，使得输入轴可通过外部驱动件驱动转动，并通过输入轴带动第二行星架实现整体传动，输入轴可通过太阳轮和第一行星轮的配合传动，驱动第二行星架对固定齿圈的传动，而太阳轮和第一行星轮均位于第一行星架内部，可避免太阳轮和第一行星轮轴向设置，增加减速机构的整体轴向长度，且可保证减速传动机构的正常传动和稳定传动，从而在缩短轴向长度的条件下，保证了较高的扭矩，有效降低了装置的体积，保证了输出扭矩的提升，且结构简单，降低了成本。
作为优选，所述第一行星架的端面上设有用于容纳输入轴的输入腔，所述输入腔的内壁上设有至少一个与输入轴的外壁连接的第一轴承；上述第一行星架的输入腔可对输入轴容纳，且保证了输入轴的转动，第一轴承的设置，加强了输入轴转动的稳定和顺畅性。
作为优选，所述第二行星架包括用于固定第一行星轮的传动架，所述传动架与输入轴同轴设置，所述传动架的侧壁通过至少一个第二轴承与第一行星架连接；上述传动架的设置，可以对第一行星轮形成支撑固定，保证第一行星轮的稳定传动，同时通过第二轴承可绕输入轴的轴线转动，以便于与输出齿圈形成传动。
作为优选，所述传动架内部设有用于容纳太阳轮和第一行星轮的第一传动腔，所述太阳轮与第二行星架同轴设置，所述第一行星轮设于太阳轮的周侧，所述第一行星轮的轮轴与第二行星架连接；上述第一传动腔的设置，可以对第一行星轮和太阳轮进行容纳，使得第一行星轮和太阳轮均位于第一行星架内部，从而减少第一行星轮和太阳轮的占用空间，缩短机构的轴向长度，减小体积，同时可通过第一行星轮和太阳轮的配合，实现对传动架的稳定传动。
作为优选，所述第二行星架的圆周外侧设有与第一行星架固定连接的端盖，所述固定齿圈设于第一行星架和端盖之间且与第二行星架固定连接，所述第一行星轮设于固定齿圈内侧且与固定齿圈啮合传动；上述端盖与第一行星架固定连接，而固定齿圈固定在第一行星架和端盖之间，第一行星轮和固定齿圈啮合连接，使得太阳轮对第一行星轮的传动，和第一行星轮与固定齿圈的啮合，可以带动第二行星架绕输入轴的轴线转动，从而在减小机构轴向长度的同时，可以实现对第二行星架的稳定传动。
作为优选，所述第二行星架包括与传动架连接且套设于输出段周侧的传动筒，所述传动筒的周侧设有至少一个第二行星轮，所述传动筒的侧壁可与第二行星轮啮合传动；上述传动筒的设置，可以通过传动架的转动，实现传动筒的转动，而第二行星轮可通过传动筒的传动转动，从而可对输出齿圈进行稳定传动，实现多级减速传动的作用。
作为优选，所述第一行星架上对应于传动筒的外侧设有第二传动腔，所述第二行星轮设于第二传动腔内，所述第二行星轮的轮轴与第二传动腔固定连接；上述第二传动腔的设置，可对第二行星轮进行容纳，增加第二行星轮的容纳空间，对第二行星轮的传动进行稳定支撑，进一步缩短机构的轴向长度，减小体积，同时保证减速传动功能的稳定。
作为优选，所述第一行星架的侧壁上设有可绕输入轴的轴线转动的输出齿圈，所述输出齿圈通过至少一个第三轴承与第一行星架的侧壁连接，所述输出齿圈的内侧与第二行星轮啮合传动；上述输出齿圈可通过第二行星轮的传动实现转动，且可通过第三轴承实现在第一行星架上的转动，有效保证了稳定传动的作用。
因此，本发明具有可缩短机构的轴向长度，保证电机低转速和高扭矩的同时，减小机构的整体体积，降低成本，降低输出扭矩的限制等特点。
图1是本发明的结构示意图。
下面通过实施例，并结合附图，对本发明的技术方案作进一步具体的说明。
如图1所示，一种割草机行走轮用驱动减速传动机构，包括输入轴1，输入轴1的圆周外侧设有与输入轴1同轴设置的第一行星架2，输入轴1可绕轴线转动，输入轴1的端面上设有穿过第一行星架2朝外延伸且与输入轴1同轴设置的输出段11，输出段11的圆周外侧设有与输出段11同轴设置的第二行星架3，输出段11的端部设有与输出段11同轴设置的太阳轮12，第二行星架3内部设有与太阳轮12啮合传动的第一行星轮31，第二行星架3的圆周外侧设有与第一行星轮31啮合传动且与第二行星架3同轴设置的固定齿圈33，第二行星架3与第一行星架2外部的输出齿圈4传动连接，第一行星架2的端面上设有用于容纳输入轴1的输入腔21，输入腔21的内壁上设有至少一个与输入轴1的外壁连接的第一轴承13。
上述输入轴与外部驱动件的输出轴连接，使得输入轴转动，而第一行星架固定输入轴的位置，第一行星架可绕输入轴的轴线转，输入轴在的输出段带动位于第二行星架内的太阳轮同步转动，太阳轮的转可带动第一行星轮转动，而第一行星轮分别与固定齿圈和太阳轮啮合传动，固定齿圈与太阳轮同轴设置，因此，太阳轮带动第一行星轮转动时，第一行星轮顺着固定齿圈的啮齿转动，由于固定齿圈固定不转动，第一行星轮转动时，会带动第二行星架同步绕太阳轮的轴线转动，输出齿圈随着第二行星架的转动同步转动。
如图1所示，第二行星架3包括用于固定第一行星轮31的传动架32，传动架32与输入轴1同轴设置，传动架32的侧壁通过至少一个第二轴承13与第一行星架2连接，传动架32内部设有用于容纳太阳轮12和第一行星轮31的第一传动腔321，太阳轮12与第二行星架3同轴设置，第一行星轮31设于太阳轮12的周侧，第一行星轮31的轮轴与第二行星架3连接，第二行星架3的圆周外侧设有与第一行星架2固定连接的端盖5，固定齿圈33设于第一行星架2和端盖5之间且与第二行星架2固定连接，第一行星轮31设于固定齿圈33内侧且与固定齿圈33啮合传动。
上述传动架与传动筒直接连接，传动筒套设于输入轴的输出段周侧，不与输入轴直接接触，而传动架通过第二轴承可在第一行星架的内侧转动，第一行星轮在第一传动腔内转动，并保持与太阳轮的啮合，端盖对第一行星架形成封闭，并通过螺栓将端盖、固定齿圈及第一行星架依次连接固定，第一行星轮转动时，会顺着固定在第一行星架上的固定齿圈的内圈自转的同时绕太阳轮公转。
如图1所示，第二行星架3包括与传动架32连接且套设于输出段11周侧的传动筒34，传动筒34的周侧设有至少一个第二行星轮23，传动筒34的侧壁可与第二行星轮23啮合传动，第一行星架2上对应于传动筒34的外侧设有第二传动腔22，第二行星轮23设于第二传动腔22内，第二行星轮23的轮轴与第二传动腔22固定连接，第一行星架2的侧壁上设有可绕输入轴1的轴线转动的输出齿圈4，输出齿圈4通过至少一个第三轴承41与第一行星架2的侧壁连接，输出齿圈4的内侧与第二行星轮23啮合传动。
上述传动筒套设于输入轴的输出段的周侧，传动筒的侧壁设置有与第二行星轮啮合的啮齿，可带动第二行星轮转动，传动架在第一行星轮和固定齿圈的配合下绕输入段的轴线转动，传动筒随着传动架的转动而筒壁转动，传动筒的转动带动第二行星轮绕输入轴的轴线转动，同时，第二行星轮与输出齿圈啮合传动，由于第一行星架固定，而第二行星轮绕自身轮轴转动，因此，第二行星轮的转动可通过啮合传动带动输出齿圈同步转动，从而实现整体的减速传动，太阳轮、第一行星轮、第二行星轮及传动筒均位于第一行星架和第二行星架内，有效缩短了机构的轴向长度，减少了机构的体积。
Claims (8)
- 一种割草机行走轮用驱动减速传动机构，其特征在于：包括输入轴（1），所述输入轴（1）的圆周外侧设有与输入轴（1）同轴设置的第一行星架（2），所述输入轴（1）可绕轴线转动，所述输入轴（1）的端面上设有穿过第一行星架（2）朝外延伸且与输入轴（1）同轴设置的输出段（11），所述输出段（11）的圆周外侧设有与输出段（11）同轴设置的第二行星架（3），所述输出段（11）的端部设有与输出段（11）同轴设置的太阳轮（12），所述第二行星架（3）内部设有与太阳轮（12）啮合传动的第一行星轮（31），所述第二行星架（3）的圆周外侧设有与第一行星轮（31）啮合传动且与第二行星架（3）同轴设置的固定齿圈（33），所述第二行星架（3）与第一行星架（2）外部的输出齿圈（4）传动连接。
- 根据权利要求1所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第一行星架（2）的端面上设有用于容纳输入轴（1）的输入腔（21），所述输入腔（21）的内壁上设有至少一个与输入轴（1）的外壁连接的第一轴承（13）。
- 根据权利要求1所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第二行星架（3）包括用于固定第一行星轮（31）的传动架（32），所述传动架（32）与输入轴（1）同轴设置，所述传动架（32）的侧壁通过至少一个第二轴承（13）与第一行星架（2）连接。
- 根据权利要求3所述的割草机行走轮用驱动减速传动机构，其特征在于：所述传动架（32）内部设有用于容纳太阳轮（12）和第一行星轮（31）的第一传动腔（321），所述太阳轮（12）与第二行星架（3）同轴设置，所述第一行星轮（31）设于太阳轮（12）的周侧，所述第一行星轮（31）的轮轴与第二行星架（3）连接。
- 根据权利要求1所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第二行星架（3）的圆周外侧设有与第一行星架（2）固定连接的端盖（5），所述固定齿圈（33）设于第一行星架（2）和端盖（5）之间且与第二行星架（2）固定连接，所述第一行星轮（31）设于固定齿圈（33）内侧且与固定齿圈（33）啮合传动。
- 根据权利要求3所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第二行星架（3）包括与传动架（32）连接且套设于输出段（11）周侧的传动筒（34），所述传动筒（34）的周侧设有至少一个第二行星轮（23），所述传动筒（34）的侧壁可与第二行星轮（23）啮合传动。
- 根据权利要求6所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第一行星架（2）上对应于传动筒（33）的外侧设有第二传动腔（22），所述第二行星轮（23）设于第二传动腔（22）内，所述第二行星轮（23）的轮轴与第二传动腔（22）固定连接。
- 根据权利要求6或7所述的割草机行走轮用驱动减速传动机构，其特征在于：所述第一行星架（2）的侧壁上设有可绕输入轴（1）的轴线转动的输出齿圈（4），所述输出齿圈（4）通过至少一个第三轴承（41）与第一行星架（2）的侧壁连接，所述输出齿圈（4）的内侧与第二行星轮（23）啮合传动。
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