CN212087018U

CN212087018U - Grass cutter

Info

Publication number: CN212087018U
Application number: CN202020441934.XU
Authority: CN
Inventors: 曹金; 高杰; 李汪浩
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-12-08
Anticipated expiration: 2030-03-31

Abstract

The utility model provides a mower, it includes casing, cutting mechanism and heightening mechanism, heightening mechanism rotates in order to drive cutting mechanism for casing up-and-down motion, heightening mechanism with be equipped with bull screw-thread fit structure between the cutting mechanism, the thread thickness of at least one of them screw thread of bull screw-thread fit structure is different with other screw threads. The utility model has the advantages that the multi-head thread matching structure is arranged between the cutting mechanism and the heightening mechanism, so that the heightening process is relieved; the multi-thread matching structure is provided with different thread thicknesses, so that the heightening mechanism is assembled to the shell without adding other marks or extra devices for indication, and the heightening mechanism is convenient to assemble.

Description

Grass cutter

Technical Field

The utility model relates to a garden instrument field especially relates to a lawn mower.

Background

The lawn mower is a common tool for maintaining a lawn, and the intelligent lawn mower is more intelligent as a substitute of a common hand-push type lawn mower and can automatically work under the unattended condition. In the working process of the intelligent lawn mower, in order to adapt to different requirements, the intelligent lawn mower needs to be provided with a height adjusting device to adjust the height of the intelligent lawn mower for cutting a lawn. One conventional height adjustment method is to provide a height adjustment rod with multiple threads on a housing of the mower, engage the height adjustment rod with the cutting mechanism, and drive the cutting mechanism to move up and down by rotating the height adjustment rod.

In the above-mentioned height adjustment method, since the multiple threads can be screwed into the cutting mechanism from different directions, a mark or an additional limit structure is required to indicate the screwing direction of the user, which brings the following problems: firstly, for the situation that the mark is arranged to indicate the screwing direction, due to manual misoperation, the situation that errors occur inevitably, rework is caused, and the production efficiency is influenced. Secondly, the identification of the operator for the identifier also needs a certain time, and the production efficiency cannot be effectively improved in production. In addition, the additional limiting structure is added, so that the manufacturing cost is increased, and meanwhile, the production efficiency is also reduced. Furthermore, the maintenance difficulty is increased while an additional limiting structure is added, and the after-sale maintenance cost is increased.

Therefore, there is a need for a lawn mower to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a mechanism's simple structure, convenient assembling's lawn mower heightens.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a mower comprises a shell, a cutting mechanism and a height adjusting mechanism, wherein the height adjusting mechanism rotates to drive the cutting mechanism to move up and down relative to the shell, a multi-head thread matching structure is arranged between the height adjusting mechanism and the cutting mechanism, and the thickness of at least one thread of the multi-head thread matching structure is different from that of other threads.

As the utility model discloses further modified technical scheme, bull screw-thread fit structure is including establishing the first screw thread portion of heightening mechanism and establishing the second screw thread portion on cutting mechanism.

As the utility model discloses further modified technical scheme, cutting mechanism includes the casing, locates motor on the casing and locating cutting member on the motor output shaft, second screw thread portion locates on the casing.

As the utility model discloses further modified technical scheme, heighten the mechanism including establishing the spacing portion of first screw thread portion top, be equipped with the bulge on the casing, spacing portion with the bulge cooperation is in order to restrict heighten the rotational position of two directions of mechanism, thereby the restriction heighten the rotatory highest position and the lowest position of mechanism.

As the utility model discloses further modified technical scheme, heightening the mechanism including establishing the portion of blocking above first screw thread portion, be fixed with on the casing with block portion matched with elastic component, the portion of blocking is gear structure, thereby elastic component and gear structure's tooth's socket card are held and will be heightened the mechanism and block.

As the utility model discloses further modified technical scheme, the lawn mower includes walking wheel and road-driving wheel's actuating mechanism, the casing includes body and mobilizable upper cover of connecting on the body, the body includes casing and lower casing, go up the casing, form hollow cavity down between the casing, cutting mechanism, heighten the mechanism and actuating mechanism is located at least part in the cavity.

As the utility model discloses further modified technical scheme, bull screw-thread fit structure is three threads, and wherein the thread thickness of two threads is equal, and the thread thickness of third thread is greater than the thread thickness of two threads.

As the utility model discloses further modified technical scheme, bull screw-thread fit structure is three threads, and wherein the thread thickness of two threads is equal, and the thread thickness of third thread is less than the thread thickness of two threads.

As a further improved technical scheme of the utility model, bull screw-thread fit structure is three-start thread, the thread thickness diverse of three-start thread.

As a further improved technical solution of the present invention, one of the first thread portion and the second thread portion is a male thread, and the other is a female thread.

In order to achieve the above purpose, the utility model discloses following technical scheme has still been adopted: a mower comprises a shell, a cutting mechanism and a height adjusting mechanism matched with the cutting mechanism, wherein the height adjusting mechanism rotates to adjust the height of the cutting mechanism, a multi-thread matching structure is arranged between the height adjusting mechanism and the cutting mechanism, and the thickness of at least one thread of the multi-thread matching structure is different from that of other threads, so that the height adjusting mechanism is limited to be assembled to the cutting mechanism from a specific direction.

As a further improved technical solution of the present invention, the multi-thread matching structure comprises a first thread portion disposed on the height-adjusting mechanism and a second thread portion disposed on the cutting mechanism; the cutting mechanism comprises a shell, a motor arranged on the shell and a cutting piece arranged on an output shaft of the motor, and the second thread part is arranged on the shell.

As a further improved technical solution of the present invention, the height-adjusting mechanism includes a limiting portion and a locking portion disposed above the first threaded portion, a protruding portion is disposed on the housing, and the limiting portion cooperates with the protruding portion to limit the rotation positions of the height-adjusting mechanism in two directions, so as to limit the highest position and the lowest position of the rotation of the height-adjusting mechanism; the shell is fixedly provided with an elastic piece matched with the clamping part, the clamping part is of a gear structure, and the elastic piece and a tooth groove of the gear structure are clamped to clamp the height-adjusting mechanism.

As the utility model discloses further modified technical scheme, bull screw-thread fit structure is three threads, and wherein the thread thickness of two threads is equal, and the thread thickness of third thread is greater than or is less than the thread thickness of two threads.

According to the technical scheme, the multi-thread matching structure is arranged between the cutting mechanism and the height adjusting mechanism, so that the height adjusting process is relieved; the multi-thread matching structure is provided with different thread thicknesses, so that the heightening mechanism is assembled to the shell without adding other marks or extra devices for indication, and the heightening mechanism is convenient to assemble.

Drawings

Fig. 1 is a perspective view of the lawn mower of the present invention.

Fig. 2 is a perspective view of the housing and the height-adjusting mechanism of the mower of the present invention.

Fig. 3 is a cross-sectional view of the height adjustment mechanism and the housing of fig. 2.

Fig. 4 is a top view of the housing of the lawn mower of the present invention.

Fig. 5 is a top view of the mower without the upper housing and the upper cover.

Fig. 6 is a partially enlarged view of a circled portion in fig. 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, the present invention provides a lawn mower 100 for trimming a lawn, wherein the cutting height of the lawn mower 100 is adjustable to meet the cutting requirements. In this embodiment, the lawn mower is an electric intelligent lawn mower, preferably a battery pack powered intelligent lawn mower, but the solution of the present application is also applicable to other types of lawn mowers.

Referring to fig. 1 and 2, a lawn mower 100 includes a housing 1, road wheels 2, a driving mechanism (not shown) for driving the road wheels, a cutting mechanism 3, and an elevation mechanism 4. The casing 1 includes a body 10 and an upper cover 11 located on the body 10, the upper cover 11 is movably connected to the body 10, the body 10 includes an upper casing 12 and a lower casing 13 (see fig. 5), a hollow cavity (not shown) is formed between the upper casing 12 and the lower casing 13, and the cutting mechanism 3, the height-adjusting mechanism 4 and the driving mechanism are at least partially located in the cavity. The upper housing 12 is also provided with a control panel 121 for controlling the mower. The control panel 121 includes a switch assembly for controlling the start and stop of the mower. The upper cover 11 is provided with an opening, and the opening prevents the control panel 121 from being shielded by the upper cover, thereby facilitating the operation of an operator.

The road wheels 2 are specifically mounted on the housing 1, and the road wheels 2 comprise two drive wheels 21 located behind the mower 100 and one driven wheel (not shown) located in front of the mower. The two drive wheels 21 are driven by a drive motor located within the cavity.

Referring to fig. 2 and 3, the height adjusting mechanism 4 rotates to drive the cutting mechanism 3 to move up and down relative to the housing 1 to change the cutting height of the cutting mechanism 3. A multi-thread matching structure (not numbered) is arranged between the height-adjusting mechanism 4 and the cutting mechanism 3, the multi-thread matching structure comprises a first thread part 41 arranged on the height-adjusting mechanism 4 and a second thread part 314 arranged on the cutting mechanism 3, and the first thread part 41 and the second thread part 314 are both provided with multi-thread. Specifically, the height adjusting mechanism 4 includes a first screw portion 41, a stopper portion 42, a locking portion 43, a connecting portion 44, and a knob 45, which are provided in this order from the bottom up. The height-adjusting mechanism 4 is preferably integrally formed, although an assembly method may be adopted.

Referring to fig. 2 to 4, the cutting mechanism 3 includes a housing 31, a motor (not shown) disposed on the housing 31, and a cutter (not shown) disposed on an output shaft of the motor for cutting grass. The second screw 314 is disposed on the housing 31, the housing 31 includes a bottom wall 310 and a side wall 311, the bottom wall 310 and the side wall 311 form a housing cavity 315 for housing the motor, the side wall 311 protrudes outward to form a protruding portion 312, the protruding portion 312 is provided with a through hole 313, and the second screw 314 is disposed on an inner wall of the through hole 313. In this embodiment, the first thread part 41 is a male thread, and the second thread part 314 is a female thread, but in other embodiments, the first thread part 41 may be a female thread, and the second thread part 314 may be a male thread.

The multi-start thread fitting structure has different thread thicknesses, and in this embodiment, the multi-start thread fitting structure is preferably a three-start thread. Referring to fig. 3, the thread thicknesses of the first thread portion 41 at the two

ends

411 and 412 are equal, and the thread thickness of the third thread portion 413 is smaller than the thread thicknesses of the

first thread portions

411 and 412. When the first thread part 41 is screwed into the second thread part 314, if the position of the multiple threads is misaligned, the first thread part 41 cannot be screwed normally, and only the corresponding threads with the same thread thickness can be screwed, and the screwing direction of the first thread part 41 is unique, so that the height-adjusting mechanism 4 is limited to be assembled to the cutting mechanism 3 from a specific direction. So set up, need not to increase sign or other auxiliary device in order to guide operating personnel installation, convenient operation. In addition, because there are three stress points at the joint during multi-thread connection, the first thread part 41 and the second thread part 314 are not easy to be locked during matching, and therefore, the multi-thread design with different thicknesses can well play a fool-proof role.

In other embodiments, the thread thicknesses of the two threads can be equal, and the thread thickness of the third thread is greater than the thread thicknesses of the two threads, or the thread thicknesses of the three threads are set to be different, so that the purpose of limiting the assembly of the height-adjusting mechanism 4 to the cutting mechanism 3 from a specific direction can be achieved.

The limiting portion 42 is used for limiting the rotation angle of the height adjusting mechanism 4, the housing 1 is provided with a protruding portion (not shown) matched with the limiting portion 42, and the limiting portion 42 and the protruding portion block each other to limit the rotation positions of the height adjusting mechanism 4 in two directions, so as to limit the highest position and the lowest position of the rotation of the height adjusting mechanism 4. The rotation angle of the height-adjusting mechanism 4 is less than 360 ° due to the mutual blocking of the limiting portion 42 and the protruding portion.

The locking part 43 is used for realizing the locking of the height adjusting mechanism 4 after the rotation of the height adjusting mechanism 4 is adjusted, and avoiding unexpected change of the cutting height. Referring to fig. 5 and 6, an elastic member 112 engaged with the locking portion 43 is fixed to the housing 1, the locking portion 43 is of a gear structure, and the elastic member 112 is locked to a tooth groove of the gear structure to lock the height adjusting mechanism 4. Specifically, the elastic member 112 has a top end 1121 matched with the tooth socket shape of the gear structure, and the top end 1121 is clamped in the tooth socket to prevent the height adjusting mechanism 4 from rotating. When the height-adjusting mechanism 4 is rotated manually, the gear structure rotates along with the gear structure, and the elastic member 112 is elastically deformed and is clamped into the next tooth groove.

The connecting portion 44 is used for fixing the knob 45, and the purpose of rotating the height adjusting mechanism 4 is achieved by manually rotating the knob 45. In other embodiments, the knob 45 can be set to be of a gear structure and linked with other motor output shafts through a transmission gear, so that the electric drive rotation is realized, and the use experience of operators is further improved.

In summary, the mower of the utility model is provided with the multi-thread fit structure between the cutting mechanism and the heightening mechanism, the heightening mechanism rotates to drive the cutting mechanism to move up and down relative to the housing, and the heightening process is relieved; in addition, the multi-thread of the multi-thread matching structure is provided with different thread thicknesses, so that the screwing direction of the heightening mechanism is indicated without adding other marks or extra devices when the heightening mechanism is assembled to the shell, the heightening mechanism is convenient to assemble, and the production efficiency is improved. In addition, the screw-in from the specific direction is realized without additionally adding a device, so that the number of assembly parts is reduced, the production cost is reduced, and the production efficiency is further improved. Furthermore, when maintenance personnel maintain, special explanation of maintenance is not needed, great trouble caused by identifying the screwing direction to the maintenance personnel is reduced, and the maintenance is convenient.

Terms such as "upper," "lower," "front," "rear," and the like, used herein to denote relative spatial positions, are used for ease of description to describe one feature's relationship to another feature as illustrated in the figures. It will be understood that the spatially relative positional terms may be intended to encompass different orientations than those shown in the figures depending on the product presentation position and should not be construed as limiting the claims.

In addition, the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the understanding of the present specification should be based on the technical personnel in the technical field, and although the present specification has described the present invention in detail with reference to the above embodiments, the person of ordinary skill in the art should understand that the person of ordinary skill in the art can still modify the present invention or substitute the same, and all the technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A lawn mower, its includes casing, cutting mechanism and heightening mechanism, heightening mechanism rotates in order to drive cutting mechanism for the casing up-and-down motion, its characterized in that: a multi-thread matching structure is arranged between the height adjusting mechanism and the cutting mechanism, and the thickness of the thread of at least one thread of the multi-thread matching structure is different from that of other threads.

2. The mower of claim 1, wherein: the multi-thread matching structure comprises a first thread part arranged on the height adjusting mechanism and a second thread part arranged on the cutting mechanism.

3. The mower of claim 2, wherein: the cutting mechanism comprises a shell, a motor arranged on the shell and a cutting piece arranged on an output shaft of the motor, and the second thread part is arranged on the shell.

4. The mower of claim 2, wherein: heightening mechanism is including establishing spacing portion above first screw thread portion, be equipped with the bulge on the casing, spacing portion with the bulge cooperation is in order to restrict heightening mechanism two directions's rotational position to the restriction heightening mechanism rotatory highest position and lowest position.

5. The mower of claim 2, wherein: the height-adjusting mechanism comprises a clamping part arranged above the first threaded part, an elastic piece matched with the clamping part is fixed on the shell, the clamping part is of a gear structure, and the elastic piece is clamped with a tooth groove of the gear structure so as to clamp the height-adjusting mechanism.

6. The mower of claim 1, wherein: the lawn mower includes walking wheel and road-driving wheel's actuating mechanism, the casing includes body and mobilizable upper cover of connecting on the body, the body includes casing and lower casing, form hollow cavity between casing, the lower casing, cutting mechanism, heighten the mechanism and actuating mechanism at least part is located in the cavity.

7. The mower of claim 2, wherein: the multi-thread matching structure is a three-end thread, wherein the thread thicknesses of the two threads are equal, and the thread thickness of the third thread is larger than the thread thicknesses of the two threads.

8. The mower of claim 2, wherein: the multi-thread matching structure is a three-end thread, wherein the thread thicknesses of the two threads are equal, and the thread thickness of the third thread is smaller than the thread thicknesses of the two threads.

9. The mower of claim 2, wherein: the multi-thread matching structure is a three-start thread, and the thread thicknesses of the three-start thread are different.

10. The mower of claim 2, wherein: one of the first thread part and the second thread part is a male thread, and the other one is a female thread.

11. A lawn mower, its include casing, cutting mechanism and with cutting mechanism matched with heighten the mechanism, heighten the mechanism and rotate in order to adjust cutting mechanism's height, its characterized in that: a multi-thread matching structure is arranged between the height adjusting mechanism and the cutting mechanism, and the thickness of the thread of at least one thread of the multi-thread matching structure is different from that of other threads, so that the height adjusting mechanism is limited to be assembled to the cutting mechanism from a specific direction.

12. The lawnmower of claim 11, wherein: the multi-thread matching structure comprises a first thread part arranged on the height adjusting mechanism and a second thread part arranged on the cutting mechanism; the cutting mechanism comprises a shell, a motor arranged on the shell and a cutting piece arranged on an output shaft of the motor, and the second thread part is arranged on the shell.

13. The mower of claim 12, wherein: the height-adjusting mechanism comprises a limiting part and a clamping part which are arranged above the first thread part, a protruding part is arranged on the shell, and the limiting part is matched with the protruding part to limit the rotating positions of the height-adjusting mechanism in two directions, so that the highest position and the lowest position of the rotation of the height-adjusting mechanism are limited; the shell is fixedly provided with an elastic piece matched with the clamping part, the clamping part is of a gear structure, and the elastic piece and a tooth groove of the gear structure are clamped to clamp the height-adjusting mechanism.

14. The lawnmower of claim 11, wherein: the lawn mower includes walking wheel and road-driving wheel's actuating mechanism, the casing includes body and mobilizable upper cover of connecting on the body, the body includes casing and lower casing, form hollow cavity between casing, the lower casing, cutting mechanism, heighten the mechanism and actuating mechanism at least part is located in the cavity.

15. The lawnmower of claim 11, wherein: the multi-thread matching structure is a three-end thread, wherein the thread thicknesses of the two threads are equal, and the thread thickness of the third thread is larger than or smaller than the thread thicknesses of the two threads.

16. The lawnmower of claim 11, wherein: the multi-thread matching structure is a three-start thread, and the thread thicknesses of the three-start thread are different.