Cutting device

Abstract

The application relates to the lawn mower technical field and discloses a cutting device, which comprises a motor assembly, a connecting assembly and a cutting assembly. The motor assembly comprises a first shell, a second shell and a motor. The motor comprises a motor body and a motor main shaft connected with the motor body. The first shell is connected with the second shell to form a first containing cavity, and the motor body is arranged in the first containing cavity. The side, away from the first shell, of the second shell is formed with a second containing cavity, and the motor main shaft penetrates through the second shell and extends into the second containing cavity. The connecting assembly is arranged in the second containing cavity and comprises a connecting piece and a fastener. The connecting piece is provided with a mounting hole, the motor main shaft penetrates through the mounting hole and is fastened with the fastener. The cutting assembly is connected with the connecting piece. The application aims to solve the technical problem that the motor main shaft of the cutting device is wound by grass bodies during work.

Description

Technical Field

[0001] This application relates to the field of lawnmower technology, and more particularly to a cutting device. Background Technology

[0002] A lawnmower robot is a mobile robot used to trim lawns, gardens, and other outdoor greenery. Through built-in sensors, navigation systems, and power units, lawnmower robots can automatically plan paths and precisely mow lawns, reducing manual maintenance costs.

[0003] Currently, lawnmower robots cannot trim grass at boundaries such as walls or fences, requiring manual handling by the user, resulting in low efficiency. Related technologies install cutting devices along the edges of the lawnmower robot to cut the grass at these boundaries. However, when the cutting device is operating, its motor shaft is easily entangled in grass, increasing the motor's load, affecting its output performance, and shortening its lifespan. Utility Model Content

[0004] This application provides a cutting device to solve the technical problem that the motor spindle is easily entangled with grass when the cutting device is in operation.

[0005] To achieve the above objectives, this application provides a cutting device comprising:

[0006] A motor assembly includes a first housing, a second housing, and a motor. The motor includes a motor body and a motor spindle connected to the motor body. The first housing and the second housing are connected to form a first receiving cavity, and the motor body is disposed within the first receiving cavity. The second housing has a second receiving cavity formed on the side opposite to the first housing, and the motor spindle passes through the second housing and extends into the second receiving cavity.

[0007] A connecting assembly is disposed within the second receiving cavity. The connecting assembly includes a connector and a fastener. The connector has a mounting hole. The motor spindle passes through the mounting hole and is fastened to the fastener to circumferentially fix the connector on the motor spindle.

[0008] The cutting assembly is connected to the connector.

[0009] In the cutting device of this application, the second housing has a protrusion on the side opposite to the first housing. The protrusion extends along the axis of the motor, and the motor spindle passes through the protrusion and is fastened to the fastener.

[0010] In the cutting device of this application, the side of the connector facing away from the motor body is provided with a mounting groove, and the mounting groove communicates with the mounting hole;

[0011] The motor spindle extends through the mounting hole into the mounting groove, and the fastener is securely connected to the motor spindle within the mounting groove.

[0012] In the cutting device of this application, in the direction of the motor axis, the depth of the mounting groove is a first dimension, the extension length of the motor spindle in the mounting groove is a second dimension, and the thickness of the fastener is a third dimension;

[0013] Wherein, the first dimension is greater than the sum of the second dimension and the third dimension.

[0014] In the cutting device of this application, the motor assembly further includes a bearing, which is disposed in the second receiving cavity, and the connecting member is sleeved in the bearing and tightly fitted and fixed to the bearing.

[0015] In the cutting device of this application, the connecting member is provided with an abutment groove on the outer side wall facing the bearing, or the bearing is provided with an abutment groove on the inner side wall facing the connecting member;

[0016] The motor assembly also includes an abutment ring, which is fitted inside the abutment groove and abuts against the bearing and the connector respectively to prevent relative rotation between the connector and the bearing.

[0017] In the cutting device of this application, the motor assembly further includes a retaining ring;

[0018] The outer circumferential surface of the connector opposite to the motor body is provided with a snap-fit ​​groove, and the snap spring is sleeved in the snap-fit ​​groove to restrict the bearing from moving toward the side opposite to the motor body.

[0019] In the cutting device of this application, the connector is provided with a plurality of heat sinks surrounding the mounting hole on the side facing the motor body.

[0020] In the cutting device of this application, the cutting component is detachably connected to the connector.

[0021] In the cutting apparatus of this application, the cutting assembly includes:

[0022] Turntable;

[0023] A movable mechanism is slidably mounted on the turntable;

[0024] A cutting rope, at least in part, is connected to the moving mechanism and extends beyond the turntable to rotate;

[0025] The cutting assembly further includes a first mounting part and a second mounting part. The first mounting part is detachably connected to the connector; the second mounting part is detachably connected to the cutting rope. When the moving mechanism is subjected to an external force, it moves relative to the turntable, and during the movement, the first mounting part is disconnected from the connector, and the second mounting part is disconnected from the cutting rope.

[0026] This application provides a cutting device, the advantages of which are:

[0027] The cutting device of this application includes a motor assembly, a connecting assembly, and a cutting assembly. The motor assembly includes a first housing, a second housing, and a motor. The motor includes a motor body and a motor spindle. The motor body is assembled in a first receiving cavity formed by the connection of the first housing and the second housing. The motor spindle passes through the second housing and extends into the second receiving cavity. The motor spindle passes through the mounting hole of the connector in the second receiving cavity and is fastened to a fastener. The connector is circumferentially fixed on the motor spindle. The connector can rotate with the motor spindle and synchronously rotate with the cutting assembly, thereby realizing the grass-cutting function. This application uses a connector to fix the motor spindle, and the space enclosed by the connector and the second housing shields the motor spindle, thereby protecting the motor spindle and preventing grass from entering the second receiving cavity, thus preventing the cutting device from being entangled in grass on the motor spindle during grass cutting. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the cutting device provided in the embodiments of this application;

[0030] Figure 2 An exploded view of the cutting device provided in the embodiments of this application;

[0031] Figure 3 Another exploded view of the cutting device provided in the embodiments of this application;

[0032] Figure 4 for Figure 3 A diagram from another perspective;

[0033] Figure 5 This is a cross-sectional schematic diagram of the cutting device provided in the embodiments of this application;

[0034] Figure 6Another exploded view of the cutting device provided in the embodiments of this application.

[0035] The markings in the image are as follows:

[0036] 10. Motor assembly; 11. First housing; 12. Second housing; 13. Motor; 131. Motor body; 132. Motor spindle; 14. First receiving cavity; 15. Second receiving cavity; 16. Protrusion; 17. Bearing; 18. Abutment ring; 19. Snap ring; 21. Connector; 210. Mounting hole; 211. Mounting groove; 22. Fastener; 23. Abutment groove; 24. Heat sink; 30. Cutting assembly; 31. Turntable; 32. Moving mechanism; 33. Cutting rope; 34. First mounting part; 35. Second mounting part. Detailed Implementation

[0037] The specific embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this application, but are not intended to limit the scope of this application.

[0038] In the description of this application, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc. used in this application to indicate the orientation or positional relationship are based on the positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device and element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] In the description of this application, it should be understood that the terms "first," "second," etc., are used to describe various types of information, but these terms are not limited to them and are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0040] like Figures 1 to 5As shown, this application provides a cutting device, which includes a motor assembly 10, a connecting assembly, and a cutting assembly 30. The motor assembly 10 includes a first housing 11, a second housing 12, and a motor 13. The motor 13 includes a motor body 131 and a motor spindle 132 connected to the motor body 131. The first housing 11 and the second housing 12 are connected to form a first receiving cavity 14, and the motor body 131 is disposed in the first receiving cavity 14. The second housing 12 has a second receiving cavity 15 formed on the side opposite to the first housing 11. The motor spindle 132 passes through the second housing 12 and extends into the second receiving cavity 15. The connecting assembly is disposed in the second receiving cavity 15 and includes a connector 21 and a fastener 22. The connector 21 has a mounting hole 210. The motor spindle 132 passes through the mounting hole 210 and is fastened to the fastener 22 to fix the connector 21 around the motor spindle 132. The cutting assembly 30 is connected to the connector 21.

[0041] In this embodiment, the motor assembly 10 includes a first housing 11, a second housing 12, and a motor 13. The motor 13 includes a motor body 131 and a motor spindle 132. The motor body 131 is the main structure of the motor 13 and is used to generate driving force to drive the motor spindle 132 to rotate. The first housing 11 and the second housing 12 are connected by threads or snaps to form a first receiving cavity 14. The first receiving cavity 14 is the installation space for the motor body 131 and is closed relative to the outside. The motor body 131 is assembled and fixed in the first receiving cavity 14. The motor spindle 132 passes through the second housing 12 and extends into the second receiving cavity 15. The motor spindle 132 passes through the mounting hole 210 of the connector 21 in the second receiving cavity 15 and is fastened to the fastener 22. The connector 21 is circumferentially fixed on the motor spindle 132. The connector 21 can rotate with the motor spindle 132 and rotate synchronously with the cutting assembly 30, thereby realizing the lawn mowing function. In this embodiment, the connector 21 is fixed to the motor spindle 132. The space enclosed by the connector 21 and the second housing 12 shields the motor spindle 132, thereby protecting the motor spindle 132 and preventing grass from entering the second receiving cavity 15. This also prevents the cutting device from being entangled in grass on the motor spindle 132 when cutting grass.

[0042] In some embodiments, the outer peripheral surface of the end of the motor spindle 132 away from the motor body 131 is provided with an external thread, and the fastener 22 is a fixing nut. The motor spindle 132 passes through the mounting hole 210 and is threadedly connected to the fixing nut. In this embodiment, the fixing nut enables the detachable installation of the connector 21 on the motor spindle 132.

[0043] In some embodiments, such as Figure 3 as well as Figure 5As shown, the second housing 12 has a protrusion 16 on the side opposite to the first housing 11. The protrusion 16 extends along the motor axis, and the motor main shaft 132 passes through the protrusion 16 and is fastened to the fastener 22.

[0044] Specifically, the protrusion 16 extends from the end face of the second housing 12 along the axis of the motor. The protrusion 16 has a hollow inner hole extending along the axis of the motor. The two ends of the hollow inner hole are connected to the first receiving cavity 14 and the second receiving cavity 15, respectively. The motor spindle 132 passes through the second housing 12 and the hollow inner hole of the protrusion 16 and is fastened to the fastener 22. The protrusion 16 can protect the extended part of the motor spindle 132 and prevent grass from getting tangled on the motor spindle 132.

[0045] In some embodiments, such as Figure 3 As shown, the side of the connector 21 facing away from the motor body 131 is provided with a mounting groove 211, which is connected to the mounting hole 210. The motor spindle 132 extends through the mounting hole 210 into the mounting groove 211, and the fastener 22 is fastened to the motor spindle 132 in the mounting groove 211.

[0046] Specifically, the connector 21 has a mounting groove 211 at its center, and a mounting hole 210 is located on the side of the connector 21 near the motor body 131. The mounting groove 211 is located on the side of the connector 21 away from the motor body 131. The mounting groove 211 communicates with the mounting hole 210, and the inner diameter of the mounting groove 211 is larger than the inner diameter of the mounting hole 210. Within the mounting groove 211, the fastener 22 is securely connected to the motor spindle 132, effectively protecting the motor spindle 132.

[0047] In some embodiments, in the direction of the motor axis, the depth of the mounting groove 211 is a first dimension, the extension length of the motor spindle 132 in the mounting groove 211 is a second dimension, and the thickness of the fastener 22 is a third dimension; wherein, the first dimension is greater than the sum of the second dimension and the third dimension.

[0048] Specifically, the depth of the mounting groove 211 is greater than the sum of the extension length of the motor spindle 132 in the mounting groove 211 and the thickness of the fastener 22, so that the fastener 22 is connected to the motor spindle 132 in the mounting groove 211, thereby allowing the connector 21 to shield and protect the extension portion of the motor spindle 132.

[0049] In some embodiments, such as Figures 3 to 5 As shown, the motor assembly 10 also includes a bearing 17, which is disposed in the second receiving cavity 15. The connecting piece 21 is sleeved in the bearing 17 and is tightly fitted and fixed to the bearing 17.

[0050] Specifically, the bearing 17 is assembled inside the second receiving cavity 15 and has a certain gap with the inner wall of the second housing 12. The connecting piece 21 is sleeved inside the bearing 17 and is tightly fitted and fixed to the bearing 17. When the connecting piece 21 rotates with the motor main shaft 132, the bearing 17 and the connecting piece 21 rotate synchronously. In this way, the connecting piece 21 rotates relative to the second housing 12 through the bearing 17. On the one hand, the bearing 17 supports the connecting piece 21 and reduces the coefficient of friction; on the other hand, the bearing 17 can prevent grass from entering the second receiving cavity 15 through the gap between the connecting piece 21 and the second housing 12, thus preventing the grass from getting tangled.

[0051] In some embodiments, oil seal plates are provided on the inner sidewall (i.e. the sidewall close to the motor body 131) and the outer sidewall (i.e. the sidewall away from the motor body 131) of the bearing 17. The oil seal plates can prevent foreign matter from entering the ball rotation space between the inner and outer sidewalls of the bearing 17, thus affecting the rotation performance of the bearing 17.

[0052] In some embodiments, such as Figure 5 As shown, the connector 21 has an abutment groove 23 on the outer side wall facing the bearing 17, or the bearing 17 has an abutment groove 23 on the inner side wall facing the connector 21; the motor assembly 10 also includes an abutment ring 18, which is sleeved in the abutment groove 23 and abuts against the bearing 17 and the connector 21 respectively to prevent the connector 21 and the bearing 17 from rotating relative to each other.

[0053] For example, the connector 21 has an abutment groove 23 on the outer side wall facing the bearing 17. The abutment groove 23 is circumferentially disposed on the outer peripheral wall of the bearing 17. The abutment ring 18 is sleeved in the abutment groove 23 and abuts against the bearing 17 and the connector 21 respectively. This increases the friction between the connector 21 and the bearing 17, making the connection between the connector 21 and the bearing 17 more stable, preventing the connector 21 and the bearing 17 from rotating relative to each other, and preventing the connector 21 from moving relative to the inner side wall of the bearing 17 due to insufficient friction when rotating. This avoids wear on the connector 21 or the inner side wall of the bearing 17.

[0054] For example, a plurality of abutment grooves 23 surrounding the connector 21 are provided on the inner sidewall of the bearing 17 facing the connector 21. The abutment grooves 23 are columnar or other shaped groove structures. Each abutment groove 23 is equipped with an abutment member, which can also increase the friction between the connector 21 and the bearing 17.

[0055] In some embodiments, such as Figure 3 and Figure 4 As shown, the motor assembly 10 also includes a retaining ring 19; the outer peripheral surface of the connector 21 opposite to the motor body 131 is provided with a retaining groove, and the retaining ring 19 is sleeved in the retaining groove to restrict the bearing 17 from moving toward the side opposite to the motor body 131.

[0056] Specifically, the retaining ring 19 is fitted into the retaining groove. After installation, the retaining ring 19 can restrict the bearing 17 from moving away from the motor body 131, thus ensuring the installation stability of the bearing 17.

[0057] In some embodiments, the side of the bearing 17 facing the motor body 131 abuts against the inner side of the second housing 12, restricting the movement of the bearing 17 toward the side closer to the motor body 131, thereby further ensuring the installation stability of the bearing 17.

[0058] In some embodiments, such as Figure 4 As shown, the connector 21 has multiple heat sinks 24 surrounding the mounting hole 210 on the side facing the motor body 131.

[0059] Specifically, by setting multiple heat sinks 24, the heat dissipation area of ​​the connector 21 is increased. When the connector 21 rotates, the heat sinks 24 rotate synchronously to blow air onto the motor body 131, enhance convection heat dissipation, improve the heat dissipation performance of the motor body 131, and prevent the motor 13 from overheating and affecting its lifespan.

[0060] In some embodiments, such as Figure 2 as well as Figure 3 As shown, the cutting assembly 30 and the connector 21 are detachably connected to facilitate the disassembly and replacement of the cutting assembly 30.

[0061] In some embodiments, such as Figure 2 as well as Figure 6 As shown, the cutting assembly 30 includes a turntable 31, a moving mechanism 32, and a cutting rope 33. The moving mechanism 32 is slidably disposed on the turntable 31, allowing the moving mechanism 32 to move relative to the turntable 31. At least a portion of the cutting rope 33 is connected to the moving mechanism 32 and extends beyond the turntable 31 to rotate and cut target objects such as lawns and vegetation under the drive of the turntable 31. The cutting assembly 30 also includes a first mounting part 34 and a second mounting part 35. The first mounting part 34 is detachably connected to the connector 21; the second mounting part 35 is detachably connected to the cutting rope 33. When the moving mechanism 32 is subjected to external force, it moves relative to the turntable 31. During the movement, the first mounting part 34 is disconnected from the connector 21, allowing the first mounting part 34 to move relative to the connector 21, facilitating the disassembly and replacement of the cutting assembly 30. During the movement, the moving mechanism 32 also disconnects the second mounting part 35 from the cutting rope 33, allowing the cutting rope 33 to move freely, facilitating the disassembly and replacement of the cutting rope 33.

[0062] In this embodiment, by using an external force to drive the moving mechanism 32 to move relative to the turntable 31, the first mounting part 34 can be removed from the connector 21, thereby removing the cutting assembly 30. The cutting rope 33 can also be removed from the second mounting part 35, simplifying the disassembly of the cutting assembly 30 and the cutting rope 33, thereby reducing disassembly time and improving disassembly efficiency.

[0063] Secondly, this embodiment also provides a lawnmower, including a lawnmower body and a cutting device as described in the above embodiment. The cutting device is installed on the lawnmower body, and when the lawnmower performs lawn mowing operations, the cutting device cuts the grass at the boundary position.

[0064] It should be understood that the term "and / or" as used in this specification and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations. It should be noted that, herein, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0065] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cutting device, characterized in that, include: A motor assembly includes a first housing, a second housing, and a motor. The motor includes a motor body and a motor spindle connected to the motor body. The first housing and the second housing are connected to form a first receiving cavity, and the motor body is disposed within the first receiving cavity. The second housing has a second receiving cavity formed on the side opposite to the first housing, and the motor spindle passes through the second housing and extends into the second receiving cavity. A connecting assembly is disposed within the second receiving cavity. The connecting assembly includes a connector and a fastener. The connector has a mounting hole. The motor spindle passes through the mounting hole and is fastened to the fastener to circumferentially fix the connector on the motor spindle. The cutting assembly is connected to the connector.

2. The cutting device of claim 1, wherein, The second housing has a protrusion on the side opposite to the first housing. The protrusion extends along the axis of the motor, and the motor spindle passes through the protrusion and is fastened to the fastener.

3. The cutting device of claim 1, wherein, The connector has a mounting groove on the side facing away from the motor body, and the mounting groove communicates with the mounting hole; The motor spindle extends through the mounting hole into the mounting groove, and the fastener is securely connected to the motor spindle within the mounting groove.

4. The cutting device of claim 3, wherein, In the direction of the motor axis, the depth of the mounting groove is a first dimension, the extension length of the motor spindle within the mounting groove is a second dimension, and the thickness of the fastener is a third dimension; Wherein, the first dimension is greater than the sum of the second dimension and the third dimension.

5. The cutting device of claim 1, wherein, The motor assembly also includes a bearing, which is disposed in the second receiving cavity, and the connecting member is sleeved in the bearing and tightly fitted and fixed to the bearing.

6. The cutting device of claim 5, wherein, The connector has an abutment groove on the outer side wall facing the bearing, or the bearing has an abutment groove on the inner side wall facing the connector. The motor assembly also includes an abutment ring, which is fitted inside the abutment groove and abuts against the bearing and the connector respectively to prevent relative rotation between the connector and the bearing.

7. The cutting device of claim 5, wherein, The motor assembly also includes a retaining ring; The outer circumferential surface of the connector opposite to the motor body is provided with a snap-fit ​​groove, and the snap spring is sleeved in the snap-fit ​​groove to restrict the bearing from moving toward the side opposite to the motor body.

8. The cutting device of claim 1, wherein, The connector has multiple heat sinks surrounding the mounting holes on the side facing the motor body.

9. The cutting device of claim 1, wherein, The cutting component is detachably connected to the connector.

10. The cutting device of claim 9, wherein, The cutting assembly includes: Turntable; A movable mechanism is slidably mounted on the turntable; A cutting rope, at least in part, is connected to the moving mechanism and extends beyond the turntable to rotate; The cutting assembly further includes a first mounting part and a second mounting part. The first mounting part is detachably connected to the connector; the second mounting part is detachably connected to the cutting rope. When the moving mechanism is subjected to an external force, it moves relative to the turntable, and during the movement, the first mounting part is disconnected from the connector, and the second mounting part is disconnected from the cutting rope.

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