Double-blade hand-push lawn mower

Abstract

The utility model relates to the technical field of lawn mowers, and in particular to a double-blade hand-push lawn mower, comprising a frame, a mounting base, a motor device and a battery, wherein two blades are connected to the motor device through a transmission mechanism below, and a grass combing plate fixed to the mounting base is provided below the blade. The motor device comprises a motor, a motor shaft and an external motor housing, and the lower end of the motor shaft passes through the mounting base to connect to the transmission mechanism. The transmission mechanism comprises a primary gear and a secondary gear, wherein the primary gear is fixedly sleeved at the lower end of the motor shaft, and two secondary gears are symmetrically arranged on both sides of the primary gear and meshedly connected therewith. Two positioning shafts are passed through the mounting base, and each positioning shaft is fixedly sleeved from top to bottom with a secondary gear and a blade. The utility model has a wide mowing range and high weeding efficiency, and can solve the technical problems of a small mowing range, inability to comb grass, and easy collision and damage of the blades of traditional hand-push lawn mowers.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a double-blade hand-push lawn mower. Background Art

[0002] A lawn mower, also known as a weed cutter, lawn mower, lawn trimmer, etc., is a mechanical tool used to trim lawns, vegetation, etc. A push lawn mower relies on the user to push it forward, and uses a motor to drive the blade assembly to rotate at high speed to trim the lawn vegetation.

[0003] Traditional push mowers have a single blade structure, and the mowing range is small at a time. It takes a lot of manpower to push the mower back and forth or increase the rotation radius of the blade to increase the mowing area. The labor intensity is high, and the power of the motor needs to be increased, which increases the noise and energy consumption. In addition, traditional push mowers do not have a device for combing the grass. When mowing, the blade directly contacts the grass vegetation. The high-speed rotating blade is easily entangled by the messy grass, and the cutting height is easily inconsistent, resulting in the grass being messy and twisted after trimming, which affects the appearance. There may also be rocks in the grass, which can easily cause the blade to bump and damage, reduce the service life of the blade and affect the mowing efficiency. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a double-blade hand-push lawn mower with a wide weeding range, high work efficiency, and the ability to comb grass while mowing. It can effectively solve the technical problems of traditional hand-push lawn mowers, such as small mowing range, low work efficiency, inability to comb grass, and easy collision and damage of blades.

[0005] In order to achieve the above technical objectives, the utility model adopts the following technical solutions:

[0006] In one technical solution of the utility model, a double-blade hand-push lawn mower is provided, comprising a frame, a mounting base plate fixed on the frame, a motor device fixed on the mounting base plate, and a battery, two blades are connected to the motor device through a transmission mechanism, a grass combing plate fixedly connected to the mounting base plate is provided below the blades, an armrest frame is connected to the top of the frame, and two sets of wheels are rotatably connected to the two sides of the frame;

[0007] The motor device comprises a motor, a motor shaft and a motor housing arranged outside the motor, wherein the lower end of the motor shaft vertically extends out of the mounting base plate and is connected to the transmission mechanism;

[0008] The transmission mechanism includes a primary gear and a secondary gear, the primary gear is sleeved on the outside of the lower end of the motor shaft and fixed thereto, and two secondary gears are symmetrically arranged on both sides of the primary gear and are meshed with the primary gear; two positioning shafts are vertically penetrated through the mounting base plate, each positioning shaft is sleeved with a secondary gear and a blade, the secondary gear is fixedly connected to the positioning shaft, and the blade is abutted and fixed to the bottom of the secondary gear.

[0009] By adopting the above technical solution, the battery powers the motor device, and the motor drives the motor shaft to synchronously drive the first-stage gear to rotate, and then drives the two second-stage gears to rotate simultaneously through the meshing transmission, and then drives the two sets of blades below to rotate simultaneously to mow the grass, thereby increasing the mowing range and improving the mowing efficiency; by setting a grass combing plate to comb the grass and limit the mowing height, it can also protect the blade to prevent the blade from touching stones and wearing the blade and affecting the service life.

[0010] Furthermore, the structure of the grass combing plate is in an "L" shape, and the grass combing plate includes a connecting part and a combing part. The upper part of the connecting part is fixedly connected to the mounting base plate, and the lower part is integrally connected to the combing part. The connecting part is located behind the transmission mechanism. The combing part is horizontally arranged below the blade and does not contact the blade. The front end of the combing part is provided with a plurality of comb teeth that are spaced apart and arranged horizontally. When mowing, the front end of the comb teeth first contacts the weeds, and the comb teeth comb the weeds and limit the height of mowing. The high-speed rotating blade cuts the weeds above the comb teeth. The forward extension distance of the combing part exceeds the edge of the blade, which can isolate the rocks on the grass, avoid the blade from being damaged by the rocks when cutting the weeds, and increase the service life of the blade.

[0011] Furthermore, a flange bearing is sleeved between the positioning shaft and the mounting base plate, the flange bearing is vertically inserted into the mounting base plate and fixedly connected to the mounting base plate, and the upper end of the positioning shaft abuts against the top of the flange bearing. When the motor drives the motor shaft to drive the primary gear to rotate, and then the meshing transmission drives the two secondary gears to drive the two sets of blades below to rotate, the positioning shaft also rotates synchronously inside the flange bearing.

[0012] Furthermore, the bottom of the mounting base is fixedly connected to a limit plate, and the limit plate is provided with three limit holes, which are respectively used to pass through and accommodate the motor shaft and two positioning shafts. The limit plate is used to fix and limit the positions of the motor shaft and the positioning shaft and ensure their position stability during the rotation process.

[0013] Furthermore, the outer cover of the transmission mechanism is provided with a protective shell, which is fixedly connected to the bottom of the mounting base plate, and has two avoidance holes for accommodating two positioning shafts, and the blade is located below the protective shell. The protective shell is used to protect the transmission mechanism to prevent weeds from being entangled in the gears during mowing, thereby affecting the normal operation of the transmission mechanism.

[0014] Further, the front side and the left and right sides of the mounting base are provided with downwardly extending baffles to protect the device arranged below the mounting base, and the distance between the lower edge of the baffle and the ground is at least 5 cm. When the blade rotates to cut the weeds, the cut weeds are easily splashed around with the rotating blade, and the downwardly extending baffles can play a certain blocking effect.

[0015] Furthermore, the first-stage gear is sleeved on the outside of the lower end of the motor shaft and fixed thereto, and the bottom end of the motor shaft is sleeved with a bottom cover, which abuts against the bottom of the first-stage gear. The bottom cover is fixedly connected to the motor shaft and the first-stage gear to form a synchronous linkage between the first-stage gear and the motor shaft.

[0016] Furthermore, a limiting ring is sleeved on the bottom of the positioning shaft, the limiting ring abuts against the bottom of the blade, and the limiting ring, the secondary gear and the secondary gear are fixedly connected by bolt connection to improve the stability of the connection and form a synchronous linkage.

[0017] Furthermore, the armrest is provided with a start switch and a grip with a rough surface, and the start switch is electrically connected to the motor device and the battery. When the user pushes the lawn mower forward by holding the grip, the user controls the motor device to start or stop by pressing the start switch, thereby mowing the lawn freely according to the lawn condition.

[0018] The lawn mower provided by the utility model has the following beneficial effects:

[0019] The double-blade hand-push lawn mower provided by the utility model is equipped with two sets of blades for synchronous mowing, has high working efficiency, can significantly expand the mowing range, and has low noise and energy consumption. A grass combing plate is also provided to comb the grass during the mowing process, thereby ensuring the mowing height and protecting the blades, preventing the blades from being damaged by hitting stones and affecting their service life. The trimmed grass has good aesthetics and the user's operation safety performance is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a three-dimensional structural schematic diagram of a double-blade hand-push lawn mower in the utility model;

[0022] Figure 2 It is a schematic diagram of the exploded structure of the double-blade hand-push lawn mower in the utility model;

[0023] Figure 3It is a schematic diagram of the structure of the double-blade hand-push lawn mower in the utility model after partial sectioning;

[0024] Figure 4 yes Figure 3 A partial enlarged view of the area “A”;

[0025] Figure 5 It is a front view of the double-blade push lawn mower of the utility model;

[0026] Figure 6 It is another three-dimensional structural schematic diagram of the double-blade hand-push lawn mower in the utility model.

[0027] Explanation of the numbers in the figure: 1. Frame; 2. Mounting base plate; 21. Baffle; 3. Motor device; 31. Motor shaft; 32. Motor cover; 33. Bottom cover; 4. Battery; 5. Transmission mechanism; 51. Primary gear; 52. Secondary gear; 53. Positioning shaft; 54. Flange bearing; 55. Limit plate; 56. Limit hole; 57. Protective shell; 58. Avoidance hole; 59. Limit ring; 6. Blade; 7. Combing plate; 71. Connecting part; 72. Combing part; 721. Comb teeth; 8. Handrail; 81. Start switch; 82. Grip part; 83. Fixing part; 84. Adjustment part; 85. Adjustment hole; 86. Adjustment bolt; 9. Wheel. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, it does not mean that the features of this utility model are limited to the embodiment.

[0029] In the description of this embodiment, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top", "bottom", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to has a specific direction, is constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model.

[0030] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0031] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0032] like Figures 1 to 3 As shown, in one embodiment of the utility model, a double-blade hand-push lawn mower is provided, comprising a frame 1, a mounting base plate 2 fixed on the frame 1, a motor device 3 fixed on the mounting base plate 2, and a battery 4. The motor device 3 is connected to the front of the mounting base plate 2, and two blades 6 are connected to the bottom of the motor device 3 through a transmission mechanism 5, and a grass combing plate 7 fixedly connected to the mounting base plate 2 is provided below the blades 6.

[0033] Specifically, refer to Figure 1 and Figure 3 The motor device 3 includes a motor (not shown in the figure), a motor shaft 31, and a motor cover 32 arranged outside the motor. The lower end of the motor shaft 31 vertically extends out of the mounting base plate 2 and is connected to the transmission mechanism 5. A heat dissipation channel is provided on the top of the motor cover 32 to help the internal motor to dissipate heat in time when working.

[0034] refer to Figures 2 to 4 The transmission mechanism 5 includes a primary gear 51 and a secondary gear 52. The primary gear 51 is sleeved on the outer part of the lower end of the motor shaft 31 and fixed thereto. The primary gear 51 is sleeved on the outer part of the lower end of the motor shaft 31 and fixed thereto. A bottom cover 33 is sleeved on the bottom end of the motor shaft 31. The bottom cover 33 abuts against the bottom of the primary gear 51. The bottom cover 33 is fixedly connected to the motor shaft 31 and the primary gear 51 to form a synchronous linkage between the primary gear 51 and the motor shaft 31.

[0035] refer to Figures 2 to 4, two secondary gears 52 are symmetrically arranged on both sides of the primary gear 51 and are meshed with the primary gear 51. Two positioning shafts 53 are vertically penetrated on the mounting base plate 2, each positioning shaft 53 is sleeved with a secondary gear 52 and a blade 6, the secondary gear 52 and the positioning shaft 53 are fixedly connected by transversely penetrated bolts, and the blade 6 abuts against the bottom of the secondary gear 52. A limiting ring 59 is sleeved on the bottom of the positioning shaft 53, the limiting ring 59 abuts against the bottom of the blade 6, and the limiting ring 59 and the secondary gear 52 are fixedly connected by bolt connection, so as to improve the stability of the connection and form a synchronous linkage.

[0036] The double-blade push lawn mower of this embodiment drives the motor shaft 31 to synchronously drive the primary gear 51 to rotate through the motor, and then drives the two secondary gears 52 to rotate simultaneously through meshing transmission, and then drives the two sets of blades 6 below to rotate simultaneously to cut grass, which can increase the mowing range of the lawn mower during one travel and improve the mowing efficiency. In addition, by setting the grass combing plate 7, the grass can be combed and the mowing height can be limited. At the same time, the blade 6 can be protected to prevent the blade 6 from touching the hidden stones in the grass during the travel of the lawn mower, thereby wearing the blade and affecting the service life.

[0037] refer to Figure 2 and Figure 6 The structure of the combing plate 7 is in an "L" shape. The combing plate 7 includes a connecting portion 71 and a combing portion 72. The upper portion of the connecting portion 71 is fixedly connected to the mounting base plate 2. The connecting portion 71 is located behind the transmission mechanism 5. The lower portion of the connecting portion 71 is integrally connected to the combing portion 72. The front end of the combing portion 72 (the side away from the operator, i.e., the side facing the operator) is fixedly connected to the mounting base plate 2. Figure 1 The direction indicated by the letter X in the figure is "front"), and a plurality of comb teeth 721 are arranged horizontally and spaced apart. Figure 5 The combing part 72 is horizontally arranged below the blade 6 and does not contact the blade 6. When mowing, the front end of the comb teeth 721 first contacts the weeds, the comb teeth 721 comb the weeds and limit the height of mowing, and the blade 6 rotating at high speed cuts the weeds above the comb teeth 721. The combing part 72 extends forward beyond the edge of the blade 6, which can isolate the rocks on the grass, avoid the blade 6 from being damaged by the rocks when cutting the weeds, and increase the service life of the blade.

[0038] refer to Figure 4 A flange bearing 54 is sleeved between the positioning shaft 53 and the mounting base plate 2. The flange bearing 54 is vertically inserted into the mounting base plate 2 and fixedly connected to the mounting base plate 2. The upper end of the positioning shaft 53 abuts against the top of the flange bearing 54. When the motor drives the motor shaft 31 to drive the primary gear 51 to rotate, and then the meshing transmission drives the two secondary gears 52 to drive the two sets of blades 6 below to rotate, the positioning shaft 53 also rotates synchronously inside the flange bearing 54.

[0039] refer to Figures 2 to 4 The bottom of the mounting base plate 2 is fixedly connected with a limit plate 55, and the limit plate 55 is provided with three limit holes 56, which are respectively used to pass through and accommodate the motor shaft 31 and the two positioning shafts 53. The limit plate 55 is used to fix and limit the positions of the motor shaft 31 and the positioning shafts 53 and ensure their position stability during the rotation process. The outer cover of the transmission mechanism 5 is provided with a protective shell 57, and the protective shell 57 is fixedly connected to the bottom of the mounting base plate 2. The protective shell 57 is provided with two avoidance holes 58 for accommodating the two positioning shafts 53, and the blade 6 is located below the protective shell 57. The protective shell 57 is used to protect the transmission mechanism 5 to prevent weeds from being entangled in the gears during mowing, thereby affecting the normal operation of the transmission mechanism.

[0040] refer to Figure 1 and Figure 2 The front side and the left and right sides of the mounting base 2 are provided with downwardly extending baffles 21 to protect the device arranged below the mounting base 2. The distance between the lower edge of the baffle 21 and the ground is at least 5 cm. When the blade 6 rotates to cut the weeds, the cut weeds are easily splashed around with the rotating blade 6. The downwardly extending baffles 21 can play a certain blocking effect.

[0041] refer to Figure 1 and Figure 3 The rear end of the frame 1 is connected to an armrest frame 8, and two sets of four wheels 9 are rotatably connected on both sides of the frame 1. A start switch 81 and a grip portion 82 with a rough surface are provided on the armrest frame 8, and the start switch 81 is electrically connected to the motor device 3 and the battery 4. When the user holds the grip portion 82 and pushes the lawn mower forward, the user controls the motor device 3 to start or stop by pressing the start switch 81, so as to freely mow the lawn according to the lawn condition. The armrest frame 8 in the utility model can adjust the length to meet the usage needs of users of different heights. The armrest frame 8 is a detachable combined structure. Specifically, the armrest frame 8 includes a fixing portion 83 detachably fixedly connected to the frame 1, and an adjusting portion 84 sleeved inside the rear end of the fixing portion 83. The adjusting portion 84 is provided with a plurality of adjusting holes 85 along the length direction, and the fixing portion 83 is provided with a bolt hole. By passing an adjusting bolt 86 through the bolt hole and the adjusting hole 85, the two are locked and fixed. When it is necessary to adjust the length of the armrest frame 8, the adjusting bolt 86 can be passed through the adjusting holes 85 at different positions.

[0042] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Therefore, any technical solution that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A double-blade push lawn mower, characterized in that: The machine comprises a frame (1), a mounting base plate (2) fixed on the frame (1), a motor device (3) fixed on the mounting base plate (2), and a storage battery (4); two blades (6) are connected to the motor device (3) via a transmission mechanism (5); a grass combing plate (7) fixedly connected to the mounting base plate (2) is provided below the blades (6); an armrest frame (8) is connected to the top of the frame (1); and two sets of wheels (9) are rotatably connected to both sides of the frame (1); The motor device (3) comprises a motor, a motor shaft (31) and a motor housing (32) arranged outside the motor, wherein the lower end of the motor shaft (31) vertically extends out of the mounting base plate (2) and is connected to a transmission mechanism (5); The transmission mechanism (5) comprises a primary gear (51) and a secondary gear (52); the primary gear (51) is sleeved on the outside of the lower end of the motor shaft (31) and fixed thereto; two secondary gears (52) are symmetrically arranged on both sides of the primary gear (51) and are meshedly connected with the primary gear (51); two positioning shafts (53) are vertically penetrated on the mounting base plate (2); each positioning shaft (53) is sleeved with a secondary gear (52) and a blade (6); the secondary gear (52) is fixedly connected to the positioning shaft (53); and the blade (6) is fixedly abutted against the bottom of the secondary gear (52).

2. A double-blade push lawn mower according to claim 1, characterized in that: The structure of the grass combing plate (7) is in an "L" shape. The grass combing plate (7) comprises a connecting portion (71) and a combing portion (72). The upper portion of the connecting portion (71) is fixedly connected to the mounting base plate (2), and the lower portion is integrally connected to the combing portion (72). The connecting portion (71) is located behind the transmission mechanism (5). The combing portion (72) is horizontally arranged below the blade (6) and does not contact the blade (6). The front end of the combing portion (72) is provided with a plurality of comb teeth (721) that are spaced apart and horizontally arranged.

3. A double-blade push lawn mower according to claim 1, characterized in that: A flange bearing (54) is sleeved between the positioning shaft (53) and the mounting base plate (2). The flange bearing (54) is vertically inserted into the mounting base plate (2) and is fixedly connected to the mounting base plate (2). The upper end of the positioning shaft (53) abuts against the top of the flange bearing (54).

4. A double-blade push lawn mower according to claim 1, characterized in that: The bottom of the mounting base plate (2) is fixedly connected to a limiting plate (55), and the limiting plate (55) is provided with three limiting holes (56) for respectively passing through and accommodating the motor shaft (31) and the two positioning shafts (53).

5. A double-blade push lawn mower according to claim 1, characterized in that: The outer cover of the transmission mechanism (5) is provided with a protective shell (57), the protective shell (57) is fixedly connected to the bottom of the mounting base plate (2), two avoidance holes (58) are provided on the protective shell (57), and the blade (6) is located below the protective shell (57).

6. A double-blade hand-push lawn mower according to claim 1, characterized in that: The front side and the left and right sides of the installation base plate (2) are provided with baffles (21) extending downwards, and the distance between the lower edge of the baffle (21) and the ground is at least 5 centimeters.

7. A double-blade push lawn mower according to claim 1, characterized in that: The first-stage gear (51) is sleeved on the outside of the lower end of the motor shaft (31) and fixed thereto; the bottom end of the motor shaft (31) is sleeved with a bottom cover (33); the bottom cover (33) abuts against the bottom of the first-stage gear (51); the bottom cover (33) is fixedly connected to the motor shaft (31) and the first-stage gear (51).

8. A double-blade push lawn mower according to claim 1, characterized in that: A limiting ring (59) is sleeved on the bottom of the positioning shaft (53), the limiting ring (59) abuts against the bottom of the blade (6), and the limiting ring (59) and the secondary gear (52) are fixedly connected by bolts.

9. A double-blade push lawn mower according to claim 1, characterized in that: The armrest frame (8) is provided with a starting switch (81) and a gripping portion (82) with a rough surface, and the starting switch (81) is electrically connected to the motor device (3) and the storage battery (4).

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