A lawn mower

Abstract

The present invention discloses a lawn mower, which includes a main body and an armrest, wherein the armrest is movably mounted on the housing of the main body in a swinging manner, and the armrest includes a handheld unit and a connecting unit, wherein the handheld unit is provided with a handle and a connecting column, and the connecting unit includes a connecting fork and an adjusting self-locking component, wherein the connecting fork is bent in an N shape as a whole, and the adjusting self-locking component includes a rotating shaft, a reset spring, an adjusting gear, and a button. The armrest structure of the lawn mower is optimized to obtain a detachable function, and the required packaging space is greatly reduced after the main components are disassembled, and the disassembly function also enables the armrest to have a height-adjustable function, which can meet the use requirements of operators of different heights. Therefore, the lawn mower has the characteristics of small packaging volume and convenient handling and storage in the commodity circulation link, and has the characteristics of convenient operation in the use stage.

Description

Technical Field

[0001] The invention relates to a lawn mower. Background Art

[0002] The lawn mower is a universal production tool with a high frequency of use, which is widely used in garden maintenance work. As a commodity, the prominent problem faced by the lawn mower in the circulation link is that the packaging volume is too large, so that the number that can be transported under standard packing conditions is small. This type of problem is mainly manifested in hand-push lawn mowers and self-propelled lawn mowers. In the prior art, the armrest of this type of lawn mower is a double push rod structure. For example, the Chinese patent publication number is CN111788939A, the publication date is October 20, 2020, and the patent name is "Apparatus and method for cooling lawn mower components". It is recorded that the lawn mower is provided with a handle, and the handle includes a right extension portion, a left extension portion, and a U-shaped portion connected to each extension portion and extending from each extension portion. The handle is the armrest of the aforementioned double push rod structure. In order to meet the safety standards, the best connection between the armrest structure and the machine body is a non-detachable fixed connection, but this will make the space occupied by the armrest affect the size of the space required for packaging. When the lawn mower is packaged in a wooden box, the space occupied by the armrest will be limited, making the wooden box very large, which brings inconvenience to the product in the market circulation link. In addition, the height of the armrest of this type of lawn mower in the prior art is fixed, which has a use defect for operators of different heights. After all, individuals of different heights have different requirements for the optimal hand-held height.

[0003] In summary, the hand-push lawn mower and the self-propelled lawn mower in the prior art have the disadvantages of large packaging volume and non-adjustable armrest height. Summary of the invention

[0004] The technical problem to be solved by the present invention is how to realize the detachable armrest of a lawn mower, thereby obtaining a lawn mower which can save packing space.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: the lawn mower comprises a main body and an armrest, the armrest is movably mounted on the shell of the main body in a swinging manner, the armrest comprises a hand-held unit and a connecting unit, the hand-held unit is provided with a handle and a connecting column, the connecting column is a straight columnar structure, the handle is located at one end of the connecting column and the handle is fixedly connected to the connecting column, the connecting unit comprises a connecting fork and an adjusting self-locking component, the connecting fork is bent in an n shape as a whole, the adjusting self-locking component comprises a rotating shaft, a reset spring, an adjusting gear, and a button, the rotating shaft passes through the shell and is movably mounted on the shell, both ends of the rotating shaft are located outside the shell, one end of the connecting fork is fixedly connected to one end of the rotating shaft, the other end of the connecting fork is fixedly connected to the other end of the rotating shaft, the reset spring and the adjusting gear are both movably mounted on the rotating shaft and are both located outside the shell, the other end of the connecting fork An inner gear ring I corresponding to the adjusting gear is provided inside the inner gear ring, the button is movably mounted on the end of the connecting fork where the inner gear ring I is provided, the button is provided with a push rod, the housing is provided with an inner gear ring II corresponding to the adjusting gear, the reset spring is located in the inner gear ring II, the thickness of the adjusting gear is greater than the depth of the inner gear ring I, the thickness of the adjusting gear is less than the depth of the inner gear ring II, the inner gear ring I is opposite to the inner gear ring II and the inner gear ring I is connected with the inner gear ring II, the motion range of the adjusting gear is located in the inner gear ring I and the inner gear ring II, the push rod extends into the inner gear ring I and is movably connected with the adjusting gear, the housing moves synchronously with the connecting fork through the adjusting gear, a connecting protrusion is provided in the middle part of the connecting fork, a thread is provided on the outside of the connecting protrusion, a flange is provided at the other end of the connecting column, a knob sleeve is installed on the connecting column, and the connecting column is movably connected with the connecting fork by screwing the connecting protrusion into the knob sleeve.

[0006] The connecting column of the armrest in the technical solution is a straight columnar structure. The structure of the connecting column can be realized by metal pipes. The number of connecting columns is only one, so the armrest structure is optimized. The armrest is a detachable structure. The handheld unit and the connecting unit are connected by a knob sleeve structure. The armrest can be assembled or disassembled by twisting the knob sleeve, and the disassembly is extremely simple. In this technical solution, thanks to the sophisticated structure of the connecting unit, the function of fixing the inclination angle of the connecting fork is obtained. When the adjustment gear is embedded in the connecting fork and the shell at the same time, the connecting fork cannot swing relative to the shell, thereby maintaining the fixed posture of the connecting fork relative to the shell; when the adjustment gear is fully pushed into the shell, the connecting fork can swing relative to the shell, thereby obtaining the effect of adjusting the inclination angle of the connecting fork. The height of the handheld unit is changed after the angle of the connecting fork is adjusted, and finally the purpose of adjusting the height of the armrest is achieved.

[0007] The swing range of the armrest is limited, which can effectively prevent accidental injuries caused by misoperation and damage to the lawn mower itself. To this end, the shell is provided with two symmetrically distributed limit grooves, the ends of the connecting fork are embedded in the limit grooves, and the shell is provided with a first limit surface and a second limit surface at the limit grooves, the first limit surface intersects with the second limit surface, the angle between the first limit surface and the horizontal plane is smaller than the angle between the second limit surface and the horizontal plane, and the swing angle of the armrest on the shell is twelve degrees to one hundred and ten degrees.

[0008] After the swing range of the armrest is physically limited, the probability of safety problems can also be reduced by power supply control. To this end, a switch function that can respond to the armrest being in an extreme position is provided in the present technical solution. The connection unit also includes a limit switch, and a limit protrusion is provided on the outside of one end of the connection fork, and the limit switch is located inside the shell, and the limit protrusion extends into the shell. The limit protrusion is movably connected to the limit switch, and the angle between the direction of the limit protrusion and the extension direction of the end of the connection unit connected to the handheld unit is greater than ninety-eight degrees.

[0009] The present invention adopts the above technical solution: the armrest structure of the lawn mower is optimized to obtain a detachable function, and the required packaging space is greatly reduced after the main components are disassembled. In addition, the armrest has a height-adjustable function through the disassembly function, which can meet the use requirements of operators of different heights. Therefore, the lawn mower has the characteristics of small packaging volume and convenient transportation and storage in the commodity circulation link, and has the characteristics of convenient operation in the use stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0011] Figure 1 It is a structural schematic diagram of a lawn mower of the present invention when the armrest is at an angle of twelve degrees relative to the horizontal plane;

[0012] Figure 2 It is a structural schematic diagram of an armrest of a lawn mower of the present invention;

[0013] Figure 3 It is a structural schematic diagram of a handheld unit of an armrest of a lawn mower according to the present invention;

[0014] Figure 4 It is a structural schematic diagram of a connecting unit of an armrest of a lawn mower according to the present invention;

[0015] Figure 5 It is a structural schematic diagram of a housing of a lawn mower of the present invention;

[0016] Figure 6 The present invention is a structural schematic diagram of a lawn mower when the armrest is at an angle of 110 degrees relative to the horizontal plane. DETAILED DESCRIPTION

[0017] like Figure 1 , 2 As shown in Figures 3, 4, 5 and 6, the lawn mower is provided with a main body 1 and an armrest 2. The main body 1 is used to mow grass when walking on the ground, and the armrest 2 is used to control the walking direction of the main body 1 and provide a certain amount of power required for walking. In this embodiment, the armrest 2 is movably mounted on the housing 3 of the main body 1, and the swing range of the armrest 2 relative to the horizontal plane is 12 degrees to 110 degrees.

[0018] The handrail 2 is composed of two parts, namely a hand-held unit and a connecting unit, which can be connected together in a combined manner and can be separated thereafter. The hand-held unit includes a handle 4 and a connecting column 5. Figure 2 , 3 As shown, the connecting column 5 is a straight columnar structure, which can be made of metal pipes, such as aluminum pipes with high structural strength and light material. The handle 4 is a ring-shaped structure, which is located at one end of the connecting column 5, and the handle 4 is fixedly connected to the bracket of the connecting column 5. After connection, the center line of the handle 4 is perpendicular to the center line of the connecting column 5, and both are in the same plane.

[0019] like Figure 3 , 4 As shown, the connection unit includes a connection fork 6, an adjustment self-locking component, and a limit switch 11. The connection fork 6 is bent into an N shape as a whole.

[0020] The adjustment self-locking assembly includes a rotating shaft 7, a return spring 8, an adjustment gear 9, and a button 10. The rotating shaft 7 passes through the housing 3 and is movably mounted on the housing 3. The rotating shaft 7 can rotate freely on the housing 3. The middle part of the rotating shaft 7 is located inside the housing 3, and the two ends of the rotating shaft 7 are located outside the housing 3. One end of the connecting fork 6 is fixedly connected to one end of the rotating shaft 7, and the other end of the connecting fork 6 is fixedly connected to the other end of the rotating shaft 7. A limit protrusion 12 is provided on the outside of one end of the connecting fork 6, and the limit switch 11 is installed inside the housing 3 and connected in series with the power supply circuit inside the lawn mower. The limit protrusion 12 extends into the housing 3. When the connecting fork 6 swings on the housing 3, the limit protrusion 12 will squeeze and push against the triggering part of the limit switch 11 to obtain a positional relationship of active connection, thereby triggering the limit switch 11.

[0021] The return spring 8 and the adjustment gear 9 are both movably mounted on the rotating shaft 7 and are both located outside the housing 3. An inner gear ring Ⅰ13 corresponding to the adjustment gear 9 is provided inside the other end of the connecting fork 6. The button 10 is movably mounted on the end of the connecting fork 6 where the inner gear ring Ⅰ13 is provided. A push rod 14 and a barb 15 structure are provided on one side of the button 10. The barb 15 is used to snap into the connecting fork 6 so that the button 10 is restricted on the connecting fork 6, so that the button 10 can move on the connecting fork 6.

[0022] like Figure 5 As shown, the housing 3 is provided with an inner gear ring II16 corresponding to the adjusting gear 9, and the reset spring 8 is located in the inner gear ring II16. The thickness of the adjusting gear 9 is greater than the depth of the inner gear ring I13, and the thickness of the adjusting gear 9 is less than the depth of the inner gear ring II16. After installation, the inner gear ring I13 is directly opposite to the inner gear ring II16 and the inner gear ring I13 is connected with the inner gear ring II16. In the initial state, the reset spring 8 always pushes the adjustment gear into the inner gear ring I13, that is, pushes the end of the connecting fork 6, and the movement range of the adjusting gear 9 is located in the inner gear ring I13 and the inner gear ring II16; because the thickness of the adjusting gear 9 is greater than the depth of the inner gear ring I13, only part of the adjusting gear 9 is embedded in the inner gear ring I13, and the other part is located in the inner gear ring II16, that is, in the housing 3, so that the connecting fork 6, the adjusting gear 9 and the housing 3 cannot move independently of each other, and the three can only move synchronously and the spatial postures of the three change synchronously. The push rod 14 of the button 10 extends into the inner gear ring Ⅰ13, and the push rod 14 faces the position of the adjusting gear 9. After pressing the button 10, the push rod 14 can establish an active connection relationship with the adjusting gear 9, and the button 10 pushes the adjusting gear 9 to move toward the position of the inner gear ring Ⅱ16, and can even push the adjusting gear 9 out of the inner gear ring Ⅰ13, so that the adjusting gear 9 can be separated from the connecting fork 6; in this state, the adjusting gear 9 and the housing 3 still cannot move independently of each other, but the connecting fork 6 can swing relative to the housing 3, and the spatial posture of the connecting fork 6 can be changed after the connecting fork 6 is pulled; when the button 10 is released, the reset spring 8 pushes the adjusting gear 9 into the inner gear ring Ⅰ13 again, so that the connecting fork 6, the adjusting gear 9 and the housing 3 cannot move independently of each other, so that the connecting fork 6 after adjusting the spatial posture can maintain the new posture on the housing 3.

[0023] The shell 3 is provided with two symmetrically distributed limiting grooves 17 on the outside, and the end of the connecting fork 6 is embedded in the limiting groove 17. The shell 3 is provided with a first limiting surface 18 and a second limiting surface 19 at the limiting groove 17. The first limiting surface 18 intersects with the second limiting surface 19. The angle between the first limiting surface 18 and the horizontal plane is smaller than the angle between the second limiting surface 19 and the horizontal plane. The first limiting surface 18 and the second limiting surface 19 will block the swinging movement of the connecting fork 6, so that the first limiting surface 18 and the second limiting surface 19 effectively limit the swinging angle of the armrest 2, ensuring that the swinging angle of the armrest 2 on the shell 3 is twelve degrees to one hundred and ten degrees. Figure 1 , 6 shown.

[0024] like Figure 4As shown, a connecting protrusion 20 is provided in the middle part of the connecting fork 6, and a thread is provided on the outside of the connecting protrusion 20. A flange is provided at the other end of the connecting column 5, and a knob sleeve 21 is installed on the connecting column 5. The diameter of the through hole at one end of the knob sleeve 21 is smaller than the outer diameter of the flange, and the diameter of the through hole at other parts of the knob sleeve 21 is larger than the outer diameter of the flange. Therefore, after the knob sleeve 21 is installed on the connecting column 5, the knob sleeve 21 is restricted on the connecting column 5, and the knob sleeve 21 can only slide on the connecting column 5, but cannot be separated from the connecting column 5. During assembly, the connecting column 5 is movably connected to the connecting fork 6 by screwing the connecting protrusion 20 into the knob sleeve 21. The handrail 2 obtains the characteristic of being detachable through the connection structure at the knob sleeve 21. When the handrail 2 is fully assembled, the angle between the direction of the limiting protrusion 12 and the extension direction of the end of the connecting unit connected to the handheld unit, that is, the extension direction of the connecting protrusion 20 of the connecting fork 6 is 110 degrees.

[0025] When packing, the handrail 2 can be disassembled and assembled by twisting the knob sleeve 21, and the handheld unit and the connecting unit can be combined together, or the handheld unit and the connecting unit can be separated. The connecting fork 6 on the connecting unit is located outside the shell 3, and the connecting fork 6 is relatively close to the surface of the shell 3, so that the main unit 1 is relatively compact in appearance and occupies less space when packaged; the removed handheld unit is also compact in appearance and occupies less space when packaged. When in use, the handheld unit is assembled to the connecting unit, and the lawn mower can be used after obtaining a complete handrail 2. If the height of the handrail 2 is to be adjusted, first press the button 10 to change the connection relationship between the connecting fork 6 and the shell 3 from a synchronous motion relationship to a relationship in which each can move independently, and the adjustment gear enters the inner gear ring II 16 as a whole. After the handrail 2 is pulled to the desired height, release the button 10, and the adjustment gear is embedded in the inner gear ring I 13 again, and the new posture of the handrail 2 is maintained thereafter. The swing range of the armrest 2 is 12 degrees to 110 degrees. When the armrest 2 is at an angle of 12 degrees with the horizontal plane, the limit protrusion 12 will push against the triggering part of the limit switch 11, and the limit switch 11 will be triggered. The limit switch 11 is in a disconnected state, so that the lawn mower cannot be started, thereby ensuring that the armrest 2 is considered to be dangerous at this height. When the armrest 2 is out of the 12-degree tilt angle, the limit switch 11 can be restored to a connected state.

Claims

1. A lawn mower, comprising a main machine (1) and an armrest (2), characterized in that: The armrest (2) is movably mounted on the housing (3) of the main unit (1) in a swinging manner. The armrest (2) comprises a handheld unit and a connecting unit. The handheld unit is provided with a handle (4) and a connecting column (5). The connecting column (5) is a straight columnar structure. The handle (4) is located at one end of the connecting column (5) and the handle (4) is fixedly connected to the connecting column (5). The connecting unit comprises a connecting fork (6) and an adjustable self-locking component. The connecting fork (6) is bent in an N-shape as a whole.The adjusting self-locking assembly comprises a rotating shaft (7), a reset spring (8), an adjusting gear (9), and a button (10); the rotating shaft (7) passes through the housing (3) and is movably mounted on the housing (3); both ends of the rotating shaft (7) are located outside the housing (3); one end of the connecting fork (6) is fixedly connected to one end of the rotating shaft (7); the other end of the connecting fork (6) is fixedly connected to the other end of the rotating shaft (7); the reset spring (8) and the adjusting gear (9) are both movably mounted on the rotating shaft (7) and are both located outside the housing (3); an inner gear ring I (13) corresponding to the adjusting gear (9) is provided inside the other end of the connecting fork (6); the button (10) is movably mounted on the inner gear ring I (13) provided on the connecting fork (6) At this end of the gear ring I (13), the button (10) is provided with a push rod (14), the housing (3) is provided with an inner gear ring II (16) corresponding to the adjusting gear (9), the reset spring (8) is located in the inner gear ring II (16), the thickness of the adjusting gear (9) is greater than the depth of the inner gear ring I (13), the thickness of the adjusting gear (9) is less than the depth of the inner gear ring II (16), the inner gear ring I (13) is directly opposite to the inner gear ring II (16) and the inner gear ring I (13) is connected to the inner gear ring II (16), the movement range of the adjusting gear (9) is located within the inner gear ring I (13) and the inner gear ring II (16), the push rod (14) extends into the inner gear ring I (13) and moves with the adjusting gear (9) The shell (3) moves synchronously with the connecting fork (6) through the adjusting gear (9), the middle part of the connecting fork (6) is provided with a connecting protrusion (20), the outside of the connecting protrusion (20) is provided with a thread, the other end of the connecting column (5) is provided with a flange, the connecting column (5) is installed with a knob sleeve (21), the connecting column (5) is movably connected with the connecting fork (6) by screwing the connecting protrusion (20) into the knob sleeve (21), the shell (3) is provided with two symmetrically distributed limiting grooves (17), the end of the connecting fork (6) is embedded in the limiting groove (17), the shell (3) is provided with a first limiting surface (18) and a second limiting surface (19) at the limiting groove (17), the The first limit surface (18) intersects with the second limit surface (19), the angle between the first limit surface (18) and the horizontal plane is smaller than the angle between the second limit surface (19) and the horizontal plane, the swing angle of the armrest (2) on the housing (3) is twelve degrees to one hundred and ten degrees, the connecting unit further comprises a limit switch (11), a limit protrusion (12) is provided on the outside of one end of the connecting fork (6), the limit switch (11) is located inside the housing (3), the limit protrusion (12) extends into the housing (3), the limit protrusion (12) is movably connected to the limit switch (11), and the angle between the direction of the limit protrusion (12) and the extension direction of the end of the connecting unit connected to the handheld unit is greater than ninety-eight degrees.

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