CN220107756U - Walking driving mechanism and garden tool - Google Patents

Abstract

The utility model provides a walking driving mechanism and a gardening tool, which belong to the technical field of gardening tools. This walking actuating mechanism includes: driving motor, reduction gear and seal structure. Wherein the speed reducer is coaxially connected with the driving motor; the sealing structure is arranged at the connecting position of the driving motor and the speed reducer, and forms sealing fit between the driving motor and the speed reducer. According to the walking driving mechanism and the garden tool, the sealing structure is arranged at the joint of the driving motor and the speed reducer, and the sealing structure is in sealing fit with the radial surface or the circumferential surface of the axial joint position of the driving motor and the speed reducer, so that foreign matters and impurities are prevented from entering a rotating gap between the speed reducer and the driving motor while the axial rotation of the speed reducer is not influenced.

Description

Walking driving mechanism and garden tool

Technical Field

The utility model relates to the technical field of garden tools, in particular to a walking driving mechanism and a garden tool.

Background

The motor of garden instrument is connected with the walking wheel transmission through the reduction gear at the output, and the common motor drive planetary gear train class reduction gear's in market actuating mechanism, because the motor assembly must have certain clearance with the reduction gear junction, does not produce the friction between static motor assembly and the planetary gear, and this clearance exists and causes that transmission structure has foreign matter impurity to get into easily in abominable environment and leads to the reduction gear internals to lose efficacy in advance.

It is therefore necessary to design a walking drive mechanism and a gardening tool to solve the above technical problems.

Disclosure of Invention

In view of the above drawbacks of the prior art, the present utility model provides a travel drive mechanism and a garden tool. The travelling driving mechanism is provided with the sealing structure at the joint of the driving motor and the speed reducer so as to realize sealing along the circumferential surface and/or the radial surface of the joint, thereby solving the technical problem that the speed reducer is invalid due to the fact that a gap exists between the motor and the speed reducer and foreign matters and impurities easily enter in a severe environment.

To achieve the above and other related objects, the present utility model provides a travel drive mechanism comprising: driving motor, reduction gear and seal structure.

Wherein the speed reducer is coaxially connected with the driving motor; the sealing structure is arranged at the connecting position of the driving motor and the speed reducer, and forms sealing fit between the driving motor and the speed reducer.

In one example of the present utility model, the sealing structure includes a first sealing member coaxially sleeved on the driving motor and/or the decelerator.

In an example of the present utility model, the first sealing member is a first sealing ring, a first elastic structure is provided on the first sealing ring, the first elastic structure is circumferentially provided on a surface of the sealing ring facing the speed reducer, and the first elastic structure is in interference against an end surface of the speed reducer and is in friction fit with the end surface to form a seal.

In an example of the present utility model, the sealing structure further includes a second sealing member coaxially disposed on the speed reducer, and a radial plane of the second sealing member at the connection position is disposed opposite to the first sealing member.

In an example of the utility model, the first sealing member is a second sealing ring, a second elastic structure is arranged on the second sealing ring along the peripheral edge, a lip is arranged on the second sealing member along the peripheral edge, the lip is positioned on the peripheral outer side of the second sealing ring, and the second elastic structure is in interference contact with the inner wall of the lip along the peripheral direction and is in friction fit with the lip to form a seal.

In an example of the present utility model, a first mesa is disposed on the first seal member, a second mesa is disposed on the second seal member, the first mesa and the second mesa are disposed opposite each other at the radial plane, and a gap is left between the first mesa and the second mesa.

In one example of the utility model, the gap distance is 1 to 3mm.

In one example of the present utility model, the second seal member is provided with a first flange along a circumferential outer edge of the first mesa, and the circumferential outer edge of the first seal member and the first flange are oppositely matched to form a seal.

In an example of the present utility model, the first sealing member is provided with a second flange along a circumferential inner edge of the second table top, the second flange extends towards one side of the speed reducer, the first table top is provided with a sealing groove matched with the second flange, the second flange is embedded into the sealing groove, and the second flange is matched with the sealing groove to form a seal.

The present utility model also provides a garden tool, comprising: the device comprises a machine body, travelling wheels, a driving motor, a power battery, a speed reducer and a sealing structure.

Wherein the travelling wheels are arranged on two sides of the machine body; the driving motor is fixedly connected with the machine body; the power battery is electrically connected with the driving motor; one end of the speed reducer is coaxially connected with the driving motor, and the other end of the speed reducer is coaxially connected with the travelling wheel; the sealing structure is arranged at the connecting position of the driving motor and the speed reducer, and forms sealing fit between the driving motor and the speed reducer.

According to the walking driving mechanism and the garden tool provided by the utility model, the sealing structure is arranged at the joint of the driving motor and the speed reducer, and the sealing structure is in sealing fit with the radial surface or the circumferential surface of the axial joint position of the driving motor and the speed reducer, so that the sealing length of the sealing structure is increased by effectively utilizing the smaller gap at the joint position of the driving motor and the speed reducer, and further foreign matter impurities are prevented from entering the rotating gap between the speed reducer and the driving motor while the axial rotation of the speed reducer is not influenced, and an effective sealing effect is realized. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a walking driving mechanism according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of an exploded view of a travel drive mechanism according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a first seal ring according to an embodiment of the utility model;

FIG. 4 is a schematic cross-sectional view of a driving mechanism at the junction of a motor and a decelerator according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an exploded view of a travel drive mechanism according to another embodiment of the present utility model;

FIG. 6 is a schematic diagram illustrating the matching of the oil seal and the second seal ring according to another embodiment of the present utility model;

FIG. 7 is a schematic cross-sectional view of a second seal ring according to another embodiment of the present utility model;

FIG. 8 is a schematic cross-sectional view of a walking drive mechanism at the junction of a motor and a decelerator according to another embodiment of the present utility model;

FIG. 9 is a schematic view of an exploded view of a travel drive mechanism according to yet another embodiment of the present utility model;

FIG. 10 is a schematic cross-sectional view of a travel drive mechanism at a junction of a motor and a decelerator according to another embodiment of the present utility model;

FIG. 11 is a schematic view of an exploded view of a travel drive mechanism according to yet another embodiment of the present utility model;

FIG. 12 is a schematic cross-sectional view of a travel drive mechanism at a junction of a motor and a decelerator according to still another embodiment of the present utility model;

FIG. 13 is a three-dimensional view of a garden tool, according to an embodiment of the present utility model;

fig. 14 is a schematic view illustrating a connection structure between a walking driving device and a walking wheel in a gardening tool according to an embodiment of the present utility model.

Description of element reference numerals

10. A gardening tool; 100. a driving motor; 110. a first groove; 120. a second protrusion; 200. a speed reducer; 210. an outer ring gear; 211. an outer gear end face; 300. a first seal; 310. a first seal ring; 311. a first elastic structure; 312. a first protrusion; 313. a second groove; 320. a second seal ring; 321. a third groove; 322. a second elastic structure; 330. an end face pressing plate; 331. a first mesa; 332. a second flanging; 400. a second seal; 410. an oil seal; 411. fastening a steel ring; 412. a lip; 420. a rotating frame; 421. a second mesa; 422. a first flanging; 423. sealing the groove; 500. a clamp; 600. and a walking wheel.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the utility model is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the utility model. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.

It should be understood that the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like are used in this specification for descriptive purposes only and not for purposes of limitation, and that the utility model may be practiced without materially departing from the novel teachings and without departing from the scope of the utility model.

Referring to fig. 1 to 12, the present utility model provides a walking driving mechanism and a gardening tool. The travelling driving mechanism is provided with the sealing structure at the joint of the driving motor and the speed reducer so as to realize sealing along the circumferential surface and/or the radial surface of the joint, thereby solving the technical problem that the speed reducer is invalid due to the fact that a gap exists between the motor and the speed reducer and foreign matters and impurities easily enter in a severe environment.

Referring to fig. 1 to 14, the travel driving mechanism includes a driving motor 100, a decelerator 200, and a sealing structure. Wherein, the decelerator 200 is coaxially connected with the driving motor 100, the traveling wheel 600 is coaxially connected with the decelerator 200, and the driving motor 100 drives the traveling wheel 600 to rotate through the decelerator 200. The sealing structure is provided at a coaxial connection position of the decelerator 200 and the driving motor 100, and forms a sealing fit between the driving motor 100 and the decelerator 200. In one embodiment, to increase the circumferential sealing area of the sealing structure, the sealing structure extends radially or circumferentially from the axially overlapping position of the drive motor 100 and the decelerator 200, and forms a sealing engagement with the circumferential surface and/or radial surface at the axially overlapping position, for the purpose of preventing foreign matter from entering the rotational gap between the decelerator 200 and the drive motor 100.

Referring to fig. 1, in an embodiment of the present utility model, a driving motor 100 is coaxially disposed with a decelerator 200 and is fixed by bolting. The first sealing member 300 is coaxially sleeved on the driving motor 100 and/or the decelerator 200 so as to form a seal in cooperation with the driving motor 100 and/or the decelerator 200 at the joint portion of the driving motor 100 and the decelerator 200, for example, in one example, the first sealing member 300 is circumferentially coaxially sleeved at the joint portion of the driving motor 100 and the decelerator 200, and simultaneously, the inner ring and/or the outer ring of the first sealing member 300 is in cooperation with the driving motor 100 and the decelerator 200 so as to form a seal between the driving motor 100 and the decelerator 200; in another example, the first sealing member 300 is coaxially sleeved on a shell at one side of the speed reducer 200 facing the driving motor 100, and the first sealing member 300 is fixedly arranged on the outer gear ring 210 of the speed reducer 200 and is matched with the end face of the shell of the driving motor 100 relatively at one side facing the driving motor 100 to form a sealing effect; in still another example, the first sealing member 300 is coaxially sleeved on a casing on a side of the driving motor 100 facing the speed reducer 200, the first sealing member 300 is fixedly arranged on the circumferential periphery of the casing of the driving motor 100, and is opposite to the outer ring gear end surface 211 of the speed reducer 200 on a side facing the speed reducer 200, a gap is reserved between the first sealing member 300 and the outer ring gear end surface 211, and a sealing structure is formed by relatively matching on a radial plane between the side of the first sealing member 300 facing the speed reducer 200 and the outer ring gear end surface 211, so that a sealing protection function on the internal structures of the speed reducer 200 and the driving motor 100 is realized on the premise that the relative rotation of the speed reducer 200 and the driving motor 100 is not affected.

The above-mentioned speed reducer 200 is a planetary speed reducer 200, and the planetary speed reducer 200 is characterized in that a larger reduction gear ratio can be generated with a smaller axial dimension, and the axial length of the planetary speed reducer 200 can even be smaller than the width of the travelling wheel 600, so that the speed reducer 200 can be completely hidden in the travelling wheel 600, and further the lateral space utilization rate is increased.

Wherein the gap distance between the first seal 300 and the outer ring gear end face 211 is 1 to 3mm, which may be 1mm, 2mm or 3mm, for example.

Referring to fig. 2 to 4, in an embodiment of the present utility model, the driving motor 100 and the decelerator 200 are coaxially disposed and fixed by bolting. The first sealing element 300 is coaxially sleeved on a shell on one side of the driving motor 100 facing the speed reducer 200, the first sealing element 300 is fixedly arranged on the circumferential periphery of the shell of the driving motor 100, the first sealing element 300 does not axially rotate on the shell of the driving motor 100, and the first sealing element 300 is arranged opposite to the outer gear ring end face 211 of the speed reducer 200 on a plane on one side facing the speed reducer 200.

As shown in fig. 2 to 4, in the present embodiment, the first sealing member 300 is a first sealing ring 310, the first sealing ring 310 is sleeved and fixed on the outer periphery of the casing of the driving motor 100, a first elastic structure 311 is disposed on the first sealing ring 310, the first elastic structure 311 is convexly disposed on a surface of the first sealing member 300 facing the speed reducer 200, and the first elastic structure 311 extends in a closed loop on an end surface of the first sealing member 300 along the circumferential direction. When the reducer 200 is coaxially assembled to the driving motor 100, one end of the first sealing ring 310 is fixed by sleeving to achieve a sealing structure with the driving motor 100, the first elastic structure 311 protruding from the other end of the first sealing ring 310 is in interference contact with the outer ring end surface 211 of the reducer 200 (the outer ring end surface 211 is a radial plane axially connected with the driving motor 100 and the reducer 200), the tail end of the first elastic structure 311 is in interference contact with the outer ring end surface 211 along the radial direction, and external foreign matters are prevented from entering from the interference position by friction contact with the outer ring end surface 211 when the outer ring 210 rotates, so that a sealing structure which does not affect axial rotation of the reducer 200 is achieved.

As shown in fig. 3 and 4, in an example of the present embodiment, the end of the first elastic structure 311 is provided as a double lip structure. When the double-lip structure at the tail end of the first elastic structure 311 is in interference contact with the outer ring gear end surface 211 of the speed reducer 200, the double-lip structure can form two rings of sealing structures with different radial positions on the outer ring gear end surface 211, so that the two rings of sealing structures can form two barriers at the connection position of the driving motor 100 and the speed reducer 200, and the sealing effect between the first sealing ring 310 and the speed reducer 200 is further enhanced.

As shown in fig. 3 and 4, in an example of the present embodiment, a first protrusion 312 is provided on an inner ring of the first seal ring 310, the first protrusion 312 is provided along a circumferential inner edge of the first seal ring 310, and a first groove 110 that matches the first protrusion 312 is provided on a circumferential outer edge of a casing of the drive motor 100 toward the reduction gear 200 side. When the first sealing ring 310 is sleeved on the casing of the driving motor 100, the first protrusion 312 on the inner ring of the first sealing ring 310 is clamped and fixed in the first groove 110 of the casing periphery Xiang Waiyuan of the driving motor 100, and the casing of the driving motor 100 is clamped in the first groove 110 by the first protrusion 312 with elastic deformation characteristic, so that the first sealing ring 310 is fixed on the casing of the driving motor 100.

As shown in fig. 2, in an example of the present embodiment, the outer ring of the first seal ring 310 is further provided with a clip 500, and the clip 500 is sleeved on the outer ring of the first seal ring 310, and the clip 500 restrains the first seal ring 310 in the circumferential direction, so that the first seal ring 310 is sleeved and fixed on the housing of the driving motor 100. The second groove 313 is formed in the circumferential surface of the outer ring of the first sealing ring 310, the shape of the second groove 313 is matched with that of the clamp 500, flanges extending inwards are formed at two ends of the top of the groove body, and the clamp 500 is embedded into the second groove 313 along the circumferential direction of the first sealing ring 310 and blocked by the flanges at the top of the second groove 313 to be fixed in the groove body.

Referring to fig. 5 to 8, in some embodiments, the driving motor 100 is coaxially disposed with the decelerator 200 and is fixed by bolting. The sealing structure between the driving motor 100 and the decelerator 200 is provided with a first sealing member 300 and a second sealing member 400 which are engaged with each other. The first sealing member 300 is coaxially sleeved on a shell of the driving motor 100 on one side facing the speed reducer 200, the first sealing member 300 is fixedly arranged on the circumferential periphery of the shell of the driving motor 100, and the first sealing member 300 does not axially rotate on the shell of the driving motor 100. The second sealing member 400 is coaxially disposed at a side of the decelerator 200 facing the driving motor 100, and the first sealing member 300 and the second sealing member 400 are disposed opposite to each other at a radial plane at a connection position between the driving motor 100 and the decelerator 200, and are engaged with each other to form a seal.

As shown in fig. 5 to 8, in an embodiment of the present utility model, the first sealing member 300 is a second sealing ring 320, the second sealing ring 320 is sleeved and fixed on the outer periphery of the casing of the driving motor 100, a second elastic structure 322 is disposed on the outer ring of the second sealing ring 320 along the circumferential outer edge, and the second elastic structure 322 extends annularly along Zhou Xiangzuo of the outer ring of the second sealing ring 320. The second seal 400 is an oil seal 410, a plane extending in a radial direction is provided on the oil seal 410, the oil seal 410 is coaxially connected with the outer gear ring 210 of the speed reducer 200 on one side of the radial plane, the oil seal 410 is provided with a lip 412 on the other side of the radial plane, the lip 412 is provided along a circumferential outer edge of the radial plane of the oil seal 410, and the lip 412 extends toward the driving motor 100 side at the circumferential outer edge of the oil seal 410. When the speed reducer 200 is coaxially assembled to the driving motor 100, the second seal ring 320 is sleeved on the casing of the driving motor 100 on the side facing the speed reducer 200, one end of the oil seal 410 is coaxially connected with the outer gear ring 210 of the speed reducer 200, the radial plane on the oil seal 410 is opposite to the side of the second seal ring 320 facing the speed reducer 200, the lip 412 on the oil seal 410 along the circumferential outer edge is located on the circumferential outer side of the second seal ring 320, the second elastic structure 322 protruding from the outer ring of the second seal ring 320 is in interference with the inner wall of the lip 412 of the oil seal 410, and the tail end of the second elastic structure 322 is in interference fit with the inner wall of the lip 412 along the circumferential surface, and when the outer ring 210 rotates along the axial direction, external foreign matters are prevented from entering from the interference position through friction fit with the inner wall of the lip 412 of the oil seal 410 along the circumferential direction, so that a sealing structure which does not influence the axial rotation of the speed reducer 200 is formed.

As shown in fig. 6 to 8, in the sealing structure in this embodiment, the second seal ring 320 and the oil seal 410 are matched on the radial surface and the circumferential surface, so that the sealing area of the first seal 300 and the second seal 400 matched on the connecting position of the driving motor 100 and the speed reducer 200 is effectively increased by using the smaller gap distance, and the sealing effect of the sealing structure is improved.

As shown in fig. 5 and 8, in an example of the present embodiment, a fastening steel ring 411 is disposed at an end of the oil seal 410 connected to the speed reducer 200, the fastening steel ring 411 is disposed along a circumferential inner edge of a radial plane of the oil seal 410, the fastening steel ring 411 extends outwards along an axial direction, the fastening steel ring 411 is matched with an outer gear ring 210 of the speed reducer 200 in size, the fastening steel ring 411 of the oil seal 410 is sleeved on the outer gear ring 210 of the speed reducer 200, for example, is sleeved outside the outer gear ring 210, and the oil seal 410 is tightly connected to the speed reducer 200 through interference fit between the fastening steel ring 411 and the outer gear ring 210.

As shown in fig. 7 and 8, in an example of the present embodiment, the end of the second elastic structure 322 is provided as a double lip structure. When the double-lip structure at the end of the second elastic structure 322 is in interference contact with the inner wall of the lip 412 of the oil seal 410, the double-lip structure can form two rings of sealing structures with different axial positions on the inner wall of the lip 412, and the two rings of sealing structures can form two barriers on the opposite circumferential surfaces of the second sealing ring 320 and the oil seal 410, so that the sealing effect between the second sealing ring 320 and the oil seal 410 is effectively enhanced.

As shown in fig. 7 and 8, in an example of the present embodiment, a third groove 321 is provided on the inner ring of the second seal ring 320, the third groove 321 is provided along the circumferential inner edge of the second seal ring 320, and a second protrusion 120 that matches the third groove 321 is provided on the circumferential outer edge of the casing of the drive motor 100 toward the side of the reduction gear 200. When the second sealing ring 320 is sleeved on the casing of the driving motor 100, the second protrusion 120 on the outer circumferential edge of the casing of the driving motor 100 is clamped and fixed in the third groove 321 on the inner ring of the second sealing ring 320, and the driving motor 100 utilizes the interference fit between the second protrusion 120 and the third groove 321, so that the second sealing ring 320 is fixed on the casing of the driving motor 100.

Referring to fig. 9-12, in some embodiments, the first seal 300 has a first land 331 thereon, and the second seal 400 has a second land 421 thereon. The first table 331 of the first seal 300 and the second table 421 of the second seal 400 are disposed opposite to each other along a radial plane, a gap is maintained between the first table 331 and the second table 421, and the first seal 300 and the second seal 400 prevent the entry of external foreign matters by using the gap between the first table 331 and the second table 421 opposite to each other, thereby forming a sealing structure that does not affect the axial rotation of the reduction gear 200.

Wherein the gap distance between the first mesa 331 and the second mesa 421 is 1 to 3mm, which may be 1mm, 2mm, or 3mm, for example.

Referring to fig. 9 and 10, in an embodiment of the utility model, the first sealing member 300 is an end-face pressing plate 330, one surface of the end-face pressing plate 330 facing the speed reducer 200 is provided as a first table 331, the end-face pressing plate 330 is sleeved on one side of the driving motor 100 housing facing the speed reducer 200, and the end-face pressing plate 330 is sleeved on the circumferential periphery of the driving motor 100 housing and is fixedly connected with the driving motor 100 housing through bolts. The second sealing element 400 is a rotating frame 420, the rotating frame 420 is fixedly connected to the outer gear ring end surface 211 of the speed reducer 200 through bolts, and a second table 421 of the rotating frame 420 and a first table 331 of the first sealing element 300 are oppositely arranged along a radial plane and are matched with each other to form a seal.

As shown in fig. 9 and 10, in an example of the present embodiment, the rotating frame 420 is provided with a first flange 422 on the second table 421, and the first flange 422 on the second table 421 is provided along the circumferential outer edge of the first table 331 and extends to the driving motor 100 side. When the driving motor 100 and the reducer 200 are axially connected, the first table surface 331 of the end-face pressing plate 330 is opposite to the second table surface 421 of the rotating frame 420, the first flange 422 disposed on the second table surface 421 circumferentially surrounds the periphery of the end-face pressing plate 330, and the circumferential outer edge of the end-face pressing plate 330 is in opposite fit with the first flange 422 on the circumferential surface to form a seal. In this example, in addition to the seal formed on the radial surface by the relative mating of the first land 331 and the second land 421, the seal formed on the circumferential surface by the relative mating of the outer edge of the end platen 330 with the first flange 422 on the rotating frame 420 is formed between the end platen 330 and the rotating frame 420. The sealing structure of the circumferential surface can generate an outward centrifugal force in the gap between the end surface pressing plate 330 and the first flange 422 to throw out the foreign matters entering the gap when the rotating frame 420 rotates relatively to the end surface pressing plate 330 along with the speed reducer 200, thereby realizing efficient sealing.

Further, as shown in fig. 11 and 12, in an embodiment of the present embodiment, the end face pressing plate 330 is provided with a second flange 332 on the first table 331, and the second flange 332 on the first table 331 is provided along the circumferential inner edge of the second table 421 and extends to the side of the decelerator 200. The second table 421 of the rotating frame 420 is provided with a sealing groove 423 at a position corresponding to the second flange 332, the sealing groove 423 is provided along the circumferential inner edge of the second table 421, and the shape of the sealing groove 423 is matched with the second flange 332. In one example, the outer ring of the sealing groove 423 is configured as a first flange 422 located at the outer edge of the second table 421, and the inner ring of the sealing groove 423 is configured at the inner edge of the second table 421.

As shown in fig. 12, when the driving motor 100 and the decelerator 200 are axially connected, the first table surface 331 of the end surface pressing plate 330 is disposed opposite to the second table surface 421 of the rotating frame 420, the second flange 332 disposed on the first table surface 331 is embedded into the sealing groove 423 disposed on the second table surface 421, and the second flange 332 is respectively matched with the inner walls and the groove bottoms of the two sides of the sealing groove 423 in the sealing groove 423 to form a seal. The sealing structure increases the sealing length between the end face pressing plate 330 and the rotating frame 420 on a plurality of radial surfaces and circumferential surfaces on the premise of not affecting the relative rotation of the speed reducer 200, and effectively improves the sealing effect of the sealing structure.

As shown in fig. 13 and 14, the present utility model also provides a garden tool 10, which garden tool 10 comprises a body, a power battery, a driving motor 100, a decelerator 200, a traveling wheel 600, and a sealing structure, as well as necessary working components, manipulation components, a control module, etc.

The road wheels 600 are disposed on two sides of the machine body, and the road wheels 600 may be, for example, pneumatic wheels formed by tires and hubs, or integrated wheels made of high polymer, and the structure of the wheels is not limited to a certain form, however, the center of the wheels needs to have a cavity capable of accommodating the decelerator 200 and even the driving motor 100. The power battery is fixed on the body and electrically connected with the driving motor 100 to supply power to the driving motor 100. The driving motor 100 is fixedly arranged on the machine body and can be used as a supporting structure for connecting the travelling wheel 600 and the machine body, the output end of the driving motor 100 is provided with the speed reducer 200, the power input end of the speed reducer 200 is coaxially connected with the output shaft of the driving motor 100, the power output end of the speed reducer 200 is coaxially connected with the travelling wheel 600, for example, the speed reducer 200 is a planetary speed reducer 200, the speed reducer 200 is arranged in a cavity of the travelling wheel 600, and an outer gear ring 210 serving as the power output end in the speed reducer 200 is connected with the cavity of the travelling wheel 600.

As shown in fig. 1, a sealing structure is provided at a coaxial connection position of the decelerator 200 and the driving motor 100, and forms a sealing engagement between the driving motor 100 and the decelerator 200. In one embodiment, to increase the circumferential sealing area of the sealing structure, the sealing structure extends radially or circumferentially from the axially overlapping position of the drive motor 100 and the decelerator 200, and forms a sealing engagement with the circumferential surface and/or radial surface at the axially overlapping position, for the purpose of preventing foreign matter from entering the rotational gap between the decelerator 200 and the drive motor 100.

The type of the working assembly used in the gardening tool is not limited, and the working assembly may be a working assembly such as a cutting assembly, a snow blowing assembly, a blower, a seeding assembly, and the like.

According to the walking driving mechanism and the garden tool provided by the utility model, the sealing structure is arranged at the joint of the driving motor and the speed reducer, and the sealing structure is in sealing fit with the radial surface or the circumferential surface of the axial joint position of the driving motor and the speed reducer, so that the sealing length of the sealing structure is increased by effectively utilizing the smaller gap at the joint position of the driving motor and the speed reducer, and further foreign matter impurities are prevented from entering the rotating gap between the speed reducer and the driving motor while the axial rotation of the speed reducer is not influenced, and an effective sealing effect is realized. Therefore, the utility model effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims (10)

1. A travel drive mechanism, comprising:

a driving motor;

the speed reducer is coaxially connected with the driving motor;

and the sealing structure is arranged at the connecting position of the driving motor and the speed reducer and forms sealing fit between the driving motor and the speed reducer.

2. The travel drive mechanism of claim 1, wherein the sealing structure comprises a first seal coaxially sleeved on the drive motor and/or the decelerator.

3. The travel drive mechanism according to claim 2, wherein the first sealing member is a first sealing ring, a first elastic structure is arranged on the first sealing ring, the first elastic structure is circumferentially arranged on one surface of the sealing ring, which faces the speed reducer, and the first elastic structure is in interference contact with the end surface of the speed reducer and is in friction fit with the end surface to form a seal.

4. The travel drive mechanism of claim 2, wherein the seal structure further comprises a second seal coaxially disposed on the decelerator, a radial plane of the second seal at the connection location being disposed opposite the first seal.

5. The travel drive mechanism of claim 4, wherein the first seal member is a second seal ring, the second seal ring is provided with a second elastic structure along a circumferential outer edge, the second seal member is provided with a lip along a circumferential outer edge of the second seal ring, and the second elastic structure is in interference contact with an inner wall of the lip along the circumferential direction and forms a seal with the lip in a friction fit manner.

6. The travel drive mechanism of claim 4, wherein a first land is provided on the first seal and a second land is provided on the second seal, the first land and the second land being disposed opposite one another at the radial plane, a gap being provided between the first land and the second land.

7. The travel drive mechanism of claim 6, wherein the clearance distance is 1 to 3mm.

8. The travel drive mechanism of claim 7, wherein the second seal provides a first flange along a circumferential outer edge of the first deck, the circumferential outer edge of the first seal and the first flange being in opposing engagement to form a seal.

9. The travel drive mechanism according to claim 6, wherein the first seal member is provided with a second flange along a circumferential inner edge of the second table surface, the second flange extends toward one side of the speed reducer, the first table surface is provided with a sealing groove matched with the second flange, the second flange is embedded in the sealing groove, and the second flange is matched with the sealing groove to form a seal.

10. A garden tool, comprising:

a body;

the walking wheels are arranged on two sides of the machine body;

the driving motor is fixedly connected with the machine body;

a power battery electrically connected with the driving motor;

one end of the speed reducer is coaxially connected with the driving motor, and the other end of the speed reducer is coaxially connected with the travelling wheel;

and the sealing structure is arranged at the connecting position of the driving motor and the speed reducer and forms sealing fit between the driving motor and the speed reducer.