A side-mounted cover self-locking mechanism and lawnmower

Abstract

This utility model belongs to the field of lawnmower technology, specifically referring to a side cover self-locking mechanism and lawnmower; it includes a mounting base fixed on the bottom shell, the mounting base having a first side plate and a second side plate, a rotating shaft passing through the first side plate, the second side plate and the side cover, and a locking block, a linear spring and a torsion spring sequentially sleeved on the section of the rotating shaft between the two side plates, the two ends of the linear spring respectively pressing against the torsion spring and the locking block, forcing the locking block to have an axial tendency to move towards the first side plate, the locking block including a locking arm, the locking arm extending out of the edge of the side cover and forming an interference limit with it, the locking block having a first locking structure, the first locking structure cooperating with a second locking structure at a corresponding position on the first side plate, restricting the rotation of the locking block in the locked state; the self-locking mechanism of the side cover of this utility model has a compact structure and is not easily opened by accidental contact or unexpected force, requiring both hands to open the side cover, effectively preventing the side cover from being opened accidentally, and is safe and reliable.

Description

Technical fields:

[0001] This utility model belongs to the field of lawnmower technology, specifically referring to a side cover self-locking mechanism and a lawnmower. Background technology:

[0002] A lawnmower, also known as a lawn mower, lawn trimmer, or lawn mower machine, is a mechanical tool used for trimming lawns, vegetation, etc. It consists of a chassis, engine, self-propelled system, blades, handle, and control unit. It has a wide range of applications, primarily for landscaping trimming, lawn mowing, urban street trimming, greening projects, field mowing, and weeding, especially in parks and grasslands, football fields and other grassy areas, private villa gardens, and agricultural and forestry farms. When using it, the stubble height after mowing must be determined according to the requirements of the lawn. Generally, a side drain is located on the bottom of the lawnmower corresponding to the blades for easy side drainage of grass. The side drain is usually covered by a side cover. If the side drain cover is accidentally opened during use, it may cause injury to the user, posing a safety hazard.

[0003] Chinese utility model patent (authorization announcement number CN 207252251 U, announcement date 2018.04.20) discloses a locking device for the side exhaust outlet of a lawnmower. This locking device has a side exhaust safety buckle device, which includes a base and a sliding tongue assembly. The base has a limiting opening at its top. The sliding tongue assembly is slidably disposed in the base. A locking part is provided at the upper end of the sliding tongue assembly. When the locking part extends outward from the limiting opening and abuts against the outer wall of the side exhaust cover, it forms a locked state. When the locking part is located inside the limiting opening, it forms an unlocked state.

[0004] The aforementioned side-mounted safety buckle device is located at the lower end of the side-mounted cover and bottom shell, and is easily opened by accident or under unexpected force, posing a certain safety hazard. Summary of the Invention:

[0005] The purpose of this invention is to provide a safe and reliable self-locking mechanism for the side cover that can prevent accidental opening of the side cover and a lawnmower.

[0006] This utility model is implemented as follows:

[0007] This utility model provides a self-locking mechanism for a side drain cover, including a bottom shell and a side drain cover. A side drain opening is provided on one side of the bottom shell, and the side drain cover is hinged to the side drain opening via a pivot. The self-locking mechanism includes a mounting base fixed on the bottom shell. The mounting base has a first side plate and a second side plate spaced apart. The pivot passes through the first side plate, the second side plate, and the side drain cover. A locking block, a linear spring, and a torsion spring are sequentially sleeved on the section of the pivot between the two side plates. The two ends of the linear spring are respectively pressed against the torsion spring and the locking block, forcing the locking block to have an axial tendency to move towards the first side plate. The locking block includes a locking arm that extends out of the edge of the side drain cover and forms an interference limit with it. A first locking structure is provided on the end face of the locking block adjacent to the first side plate. The first locking structure cooperates with a second locking structure at a corresponding position on the first side plate to restrict the rotation of the locking block in the locked state.

[0008] In the aforementioned self-locking mechanism for a side panel cover, the first locking structure is a protrusion on the side wall adjacent to the first side plate on the locking block, and the second locking structure is a locking hole located at a corresponding position on the first side plate. In the locked state, the protrusion is inserted into the locking hole; when unlocked, the protrusion disengages from the locking hole.

[0009] In the aforementioned side cover self-locking mechanism, the protrusion is a wedge-shaped locking tooth.

[0010] In the aforementioned self-locking mechanism for a side exhaust cover, the torsion spring is a double torsion spring, comprising a first spring body and a second spring body, with a U-shaped connecting portion provided between the first spring body and the second spring body. The first spring body and the second spring body are sleeved on the rotating shaft, and the U-shaped connecting portion abuts against the bottom shell or mounting base. Each spring body extends out a torsion arm, and the two torsion arms are connected to the side exhaust cover. The U-shaped connecting portion and the two torsion arms are arranged in opposite directions.

[0011] In the aforementioned side cover self-locking mechanism, the mounting base further includes a base plate located between the first side plate and the second side plate, and the mounting base is fixedly connected to the bottom shell via fasteners through the base plate.

[0012] In the aforementioned side cover self-locking mechanism, the base plate is provided with one or more protrusions, and the bottom shell is provided with insertion holes whose positions and numbers correspond one-to-one with the protrusions, with the protrusions inserted into the insertion holes.

[0013] In the aforementioned side-mounted cover self-locking mechanism, the edge of the side-mounted cover is provided with an avoidance groove, and the locking arm and the groove wall corresponding to the avoidance groove form an interference limit.

[0014] In the aforementioned side cover self-locking mechanism, a spring seat is provided on the side wall adjacent to the locking block and the linear spring, and one end of the linear spring is fitted onto the spring seat.

[0015] Another objective of this invention is to provide a lawnmower that includes the aforementioned side cover self-locking mechanism.

[0016] The outstanding advantages of this utility model compared to the prior art are:

[0017] 1. The self-locking mechanism of the side exhaust cover of this utility model is compact and not easily opened by accident or force. It requires two hands to open the side exhaust cover, which effectively prevents the side exhaust cover from being opened by accident and is safe and reliable.

[0018] 2. The linear spring pushes the locking block and the first side plate to lock each other through the first and second locking structures, which restricts the rotation of the locking block. The locking arm interferes with the edge of the side cover, preventing the side cover from accidentally opening due to the spring force of the torsion spring, thus improving the locking reliability.

[0019] 3. This utility model only requires overcoming the axial force of the linear spring to drive the locking block to move axially to unlock, making the operation simple and convenient. Attached image description:

[0020] Figure 1 This is one of the schematic diagrams of the side drain cover of this utility model in the open state, without the side drain guide plate installed;

[0021] Figure 2 This is the second schematic diagram of the side exhaust cover of this utility model in the open state, without the side exhaust guide plate installed;

[0022] Figure 3 This is a schematic diagram of the side drain cover of this utility model in the open state, with the side drain guide plate installed;

[0023] Figure 4 This is a schematic diagram of the side cover of this utility model when closed;

[0024] Figure 5 This is a top view of the side cover of this utility model when it is closed;

[0025] Figure 6 yes Figure 5 AA section view;

[0026] Figure 7 yes Figure 6 A magnified view of a portion of the image;

[0027] Figure 8 This is an exploded view of the present invention;

[0028] Figure 9 This is a schematic diagram of the self-locking mechanism of this utility model;

[0029] Figure 10 This is one of the schematic diagrams of the locking block of this utility model;

[0030] Figure 11 This is the second schematic diagram of the locking block of this utility model;

[0031] Figure 12 This is a schematic diagram of the mounting base of this utility model from the bottom.

[0032] Figure 13 This is a schematic diagram of the side guide plate of this utility model.

[0033] In the picture:

[0034] 1. Bottom shell; 2. Side drain cover; 3. Side drain port; 4. Rotating shaft; 5. Mounting base; 6. First side plate; 7. Second side plate; 8. Locking block; 9. Linear spring; 10. Torsion spring; 11. Limiting part; 12. Side drain guide plate; 13. U-shaped opening; 14. Protrusion; 15. Locking hole; 16. Bottom plate; 17. Raised protrusion; 18. Insertion hole; 19. Spring seat; 20. Clearance groove. Detailed implementation method:

[0035] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —13:

[0036] This utility model provides a self-locking mechanism for a side drain cover, including a bottom shell 1 and a side drain cover 2. A side drain opening 3 is provided on one side of the bottom shell 1. The side drain cover 2 is hinged to the side drain opening 3 via a pivot 4. The self-locking mechanism includes a mounting base 5 fixed to the bottom shell 1. The mounting base 5 has a first side plate 6 and a second side plate 7 spaced apart. The pivot 4 passes through the first side plate 6, the second side plate 7, and the side drain cover 2. A locking block 8, a linear spring 9, and a torsion spring 10 are sequentially sleeved on the section of the pivot 4 between the two side plates. The two ends of the linear spring 9 are respectively pressed against the torsion spring 10 and the locking block 8, forcing the locking block 8 to have an axial tendency to move towards the first side plate 6, while the torsion spring 10 abuts against the second side plate 7. The locking block 8 includes a locking arm 11, which extends out of the edge of the side cover 2 and forms an interference limit with it. The end face of the locking block 8 adjacent to the first side plate 6 is provided with a first locking structure. The first locking structure cooperates with the second locking structure at the corresponding position on the first side plate 6 to restrict the rotation of the locking block 8 in the locked state.

[0037] When the side cover 2 is closed, the locking block 8 is locked to the first side plate 6, and the locking arm 11 is located at the edge of the side cover 2 to restrict the rotation of the side cover 2.

[0038] When the side exhaust cover 2 needs to be opened, use one hand to move the locking block 8 along the axis of the rotating shaft 4 towards the compression linear spring 9 until the locking engagement between the locking block 8 and the first side plate 6 is released. Use the other hand to flip the side exhaust cover 2 open, allowing it to rotate around the rotating shaft 4. During this process, the edge of the side exhaust cover 2 acts on the locking arm 11, causing the locking block 8 to rotate together. After opening, install the side exhaust guide plate 12. The mounting part of the side exhaust guide plate 12 is provided with a U-shaped opening 13, which can be used to snap onto the rotating shaft 4, making disassembly and assembly convenient.

[0039] After weeding is completed, remove the side guide plate 12. Under the action of the torsion spring 10, drive the side cover 2 to rotate around the pivot 4 to reset. Manually move the locking block 8 to relock it with the first side plate 6.

[0040] This invention opens the side drain cover 2 through two actions, which can prevent the side drain cover 2 from being opened accidentally, making it safe and reliable.

[0041] Furthermore, the first locking structure is a protrusion 14 located on the side wall adjacent to the first side plate 6 of the locking block 8, and the second locking structure is a locking hole 15 located at a corresponding position on the first side plate 6. In the locked state, the protrusion 14 is engaged in the locking hole 15; in the unlocking state, the locking arm 11 is axially pushed to drive the locking block 8 toward the second side plate until the protrusion 14 disengages from the locking hole 15. At this time, both the locking block 8 and the side cover 2 can rotate around the pivot 4. In practical applications, if the positions of the protrusion 14 and the locking hole 15 are interchanged, they should constitute an equivalent structure.

[0042] In this embodiment, the protrusion 14 is a wedge-shaped locking tooth. When the side cover 2 is reset, the inclined surface of the wedge-shaped locking tooth is squeezed by the edge of the locking hole 15, automatically compressing the linear spring 9 until the wedge-shaped locking tooth slides into the locking hole 15 to complete the locking.

[0043] In addition, the first locking structure and the second locking structure of this utility model can also be implemented by using strong magnets that attract each other.

[0044] In addition, the torsion spring 10 described in this utility model is a double torsion spring, including a first spring body and a second spring body. A U-shaped connecting part is provided between the first spring body and the second spring body. The first spring body and the second spring body are sleeved on the rotating shaft 4. The U-shaped connecting part abuts against the bottom shell 1 or the mounting base 5. Each spring body extends out a torsion arm. The two torsion arms are connected to the side cover 2. The U-shaped connecting part and the two torsion arms are arranged in opposite directions.

[0045] The mounting base 5 of this utility model also includes a base plate 16 located between the first side plate 6 and the second side plate 7. The mounting base 5 is fixedly connected to the bottom shell 1 through the base plate 16 by fasteners.

[0046] It should be noted that the base plate 16 has one or more downward-facing protrusions 17, and the bottom shell 1 has insertion holes 18 with a position and number corresponding to the protrusions 17. The protrusions 17 are inserted into the insertion holes 18, which can prevent the mounting base 5 from rotating on the bottom shell 1. Furthermore, the mounting base 5 and the bottom shell 1 can be assembled with only one fastener, making assembly and disassembly convenient.

[0047] In order to restrict the position of the linear spring 9, a spring seat 19 is provided on the side wall of the locking block 8 adjacent to the linear spring 9, and one end of the linear spring 9 is fitted onto the spring seat 19.

[0048] Furthermore, this invention provides an clearance groove 20 on the edge of the side drain cover 2, and the locking arm 11 forms an interference limit with the groove wall corresponding to the clearance groove 20. The clearance groove 20 increases the rotation angle of the side drain cover 2, improves operational convenience, and facilitates cleaning of the side drain outlet 3.

[0049] Another object of this utility model is to provide a lawnmower that includes the side cover self-locking mechanism as described above.

[0050] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.

Claims

1. A side drain cover self-locking mechanism, comprising a bottom shell (1) and a side drain cover (2), wherein a side drain port (3) is provided on one side of the bottom shell (1), and the side drain cover (2) is hinged to the side drain port (3) via a pivot (4), characterized in that: The self-locking mechanism includes a mounting base (5) fixed on the bottom shell (1). The mounting base (5) has a first side plate (6) and a second side plate (7) spaced apart. The rotating shaft (4) passes through the first side plate (6), the second side plate (7) and the side cover (2). The section of the rotating shaft (4) between the two side plates is sequentially fitted with a locking block (8), a linear spring (9) and a torsion spring (10). The two ends of the linear spring (9) are respectively pressed against the torsion spring (10) and the locking block (8), forcing the locking block (8) to have an axial tendency to move towards the first side plate (6). The locking block (8) includes a locking arm (11). The locking arm (11) extends out of the edge of the side cover (2) and forms an interference limit with it. The end face of the locking block (8) adjacent to the first side plate (6) is provided with a first locking structure. The first locking structure cooperates with the second locking structure at the corresponding position on the first side plate (6) to restrict the rotation of the locking block (8) in the locked state.

2. The side cover self-locking mechanism according to claim 1, characterized in that: The first locking structure is a protrusion (14) on the side wall adjacent to the first side plate (6) on the locking block (8), and the second locking structure is a locking hole (15) located at the corresponding position on the first side plate (6). In the locked state, the protrusion (14) is inserted into the locking hole (15); when unlocked, the protrusion (14) is disengaged from the locking hole (15).

3. The side cover self-locking mechanism according to claim 2, characterized in that: The protrusion (14) is a wedge-shaped tooth.

4. The side cover self-locking mechanism according to claim 1, characterized in that: The torsion spring (10) is a double torsion spring (10), including a first spring body and a second spring body. A U-shaped connecting part is provided between the first spring body and the second spring body. The first spring body and the second spring body are sleeved on the rotating shaft (4). The U-shaped connecting part abuts against the bottom shell (1) or the mounting base (5). Each spring body extends out a torsion arm. The two torsion arms are connected to the side cover (2). The U-shaped connecting part and the two torsion arms are arranged in opposite directions.

5. The side cover self-locking mechanism according to claim 1, characterized in that: The mounting base (5) also includes a base plate (16) located between the first side plate (6) and the second side plate (7), and the mounting base (5) is fixedly connected to the bottom shell (1) by fasteners through the base plate (16).

6. The side cover self-locking mechanism according to claim 5, characterized in that: The base plate (16) is provided with one or more protrusions (17), and the bottom shell (1) is provided with insertion holes (18) whose positions and numbers correspond one-to-one with the protrusions (17). The protrusions (17) are inserted into the insertion holes (18).

7. The side cover self-locking mechanism according to claim 1, characterized in that: The edge of the side cover (2) is provided with a relief groove (20), and the locking arm (11) and the groove wall corresponding to the relief groove (20) form an interference limit.

8. The side cover self-locking mechanism according to claim 1, characterized in that: The locking block (8) is provided with a spring seat (19) on the side wall adjacent to the linear spring (9), and one end of the linear spring (9) is fitted onto the spring seat (19).

9. A lawnmower, characterized in that: Includes the side cover self-locking mechanism as described in any one of claims 1-8.

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