Knob brake device and lawn mower

Abstract

The utility model discloses a kind of knob brake devices and mower, knob brake device includes knob main body, knob bottom ring, knob cover and locating bead, knob brake device drives the rotation of motor height adjusting device's spiral column, spiral column drives motor in motor height adjusting device to move upwards or downwards, the lower end surface of knob bottom ring is equipped with ring locating hole;Locating bead is located on the device shell upper surface of motor height adjusting device, and is matched with the position of locating hole, and the bottom of each locating bead is equipped with spring;Knob cover is equipped with hole position, after knob main body passes through knob cover, knob cover is fixed with the device shell upper surface. The application can prevent knob from rotating randomly, make the rotation process more stable, simultaneously utilize sound or touch to perceive rotation angle, facilitate angle control, can be applied to adjust the height of motor, to adjust the height of motor front end prop, blade and other devices, structure is firm and stable, suitable for high-power electrical product.

Description

Technical Field

[0001] This utility model relates to a knob braking device and a lawnmower. Background Technology

[0002] As a core piece of garden machinery, lawnmowers are 8 to 10 times more efficient than manual weeding, with lower seedling damage and higher cleanliness. Their technological development has evolved from human-powered to intelligent. Early lawnmowers relied mainly on human power or animal traction, resulting in low efficiency and high labor intensity. In the mid-19th century, the first mechanical lawnmower was invented, employing a rotating blade design, laying the foundation for the basic working principle of modern lawnmowers. In the early 20th century, with the maturity of internal combustion engine technology, gasoline-powered lawnmowers rapidly became widespread, significantly improving operational efficiency, but also suffering from problems such as high noise and pollution. In the late 20th century, electric lawnmowers began to emerge. Initially limited by the inconvenience of wired power supply, true wireless freedom of operation was only achieved with breakthroughs in battery technology.

[0003] The existing height adjustment device for the motor of the lawnmower is structurally unstable and poses a safety hazard. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the unstable structure of the motor height adjustment device of the existing lawnmower, which poses a safety hazard. It provides a knob braking device and lawnmower that can prevent the knob from turning randomly, make the rotation process more stable, and use sound or touch to sense the rotation angle for convenient angle control.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A knob braking device for adjusting the motor height of a lawnmower, characterized in that the knob braking device includes a knob body, a knob bottom ring, a knob cover plate, and several positioning beads.

[0007] The rotary brake device drives the screw column of the motor height adjustment device to rotate, and the screw column drives the motor in the motor height adjustment device to move up or down.

[0008] The lower end face of the bottom ring of the knob is provided with a ring of positioning holes;

[0009] The positioning beads are located on the upper surface of the housing of the motor height adjustment device and are matched with the position of the positioning hole. Each positioning bead has a spring at its bottom.

[0010] The knob cover has a hole, and after the knob body passes through the knob cover, the knob cover is fixed to the upper surface of the device housing.

[0011] Preferably, a limiting circular hole is provided on the upper surface of the device housing, and a limiting circular ring is provided below the bottom circular ring of the knob, and the limiting circular ring is installed in the limiting circular hole.

[0012] Preferably, a connecting post is provided at the bottom center of the knob body, two snap-fit ​​strips are provided on the side of the connecting post, and a snap-fit ​​hole for matching the connecting post and the snap-fit ​​strips is provided at the top of the spiral post.

[0013] Preferably, a fixing post is provided at the bottom of the knob body between the connecting post and the limiting ring, and a fixing hole matching the fixing post is provided at the top of the spiral post.

[0014] Preferably, a scale is provided on the outer side of the hole in the knob cover.

[0015] Preferably, the number of positioning beads is four.

[0016] Preferably, the motor height adjustment device includes a motor housing, a guide device, and a bearing.

[0017] The motor housing contains a motor, and the front end of the motor housing has a threaded hole that matches the threaded post.

[0018] The device housing has a mounting hole that matches the shape of the motor housing. The motor housing is positioned in the mounting hole via the guide device, and the guiding direction of the guide device is parallel to the axial direction of the threaded column.

[0019] The bottom of the threaded column is connected to the bottom of the mounting hole via the bearing. A knob is provided above the threaded column. The knob drives the threaded column to rotate. The rotation of the threaded column in the threaded hole causes the motor housing to move up or down.

[0020] Preferably, the motor housing includes a housing body, the guiding device includes a guiding protrusion, the guiding protrusion is disposed on both sides of the housing body, and the mounting hole is provided with a guiding groove matching the guiding protrusion on both sides, the guiding protrusion being installed in the guiding groove;

[0021] The front side of the housing body is provided with a mounting protrusion, and the screw hole is provided in the mounting protrusion. Both the mounting protrusion and the guide protrusion are located at the top of the housing body.

[0022] Preferably, a guide protrusion is provided on each side of the mounting protrusion, and a guide protrusion is provided on each side of the housing body;

[0023] The guiding device includes a guide post, and each guide groove has a guide post. The bottom of the guide post is located at the bottom of the device housing. The guide protrusion has a through hole that matches the guide post. A return spring is provided on the guide post between the bottom of the device housing and the guide protrusion.

[0024] This utility model also provides a lawnmower, characterized in that the lawnmower includes the knob braking device described above.

[0025] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0026] The positive and progressive effects of this utility model are as follows:

[0027] This application can prevent the knob from turning randomly, making the rotation process more stable. At the same time, it uses sound or touch to sense the rotation angle, which facilitates angle control. It can be applied to adjust the height of the motor, thereby adjusting the height of the motor front end props, blades and other components. The structure is robust and stable, and it is suitable for high-power electrical products. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the motor height adjustment device according to Embodiment 1 of this utility model.

[0029] Figure 2 This is another structural schematic diagram of the motor height adjustment device of Embodiment 1 of this utility model.

[0030] Figure 3 This is another structural schematic diagram of the motor height adjustment device of Embodiment 1 of this utility model.

[0031] Figure 4 This is a schematic diagram of the rotary brake device according to Embodiment 1 of this utility model.

[0032] Figure 5 This is another structural schematic diagram of the knob braking device of Embodiment 1 of this utility model. Detailed Implementation

[0033] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0034] Example 1

[0035] In this embodiment, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] See Figures 1 to 3 This embodiment provides a lawnmower.

[0037] The lawnmower includes a motor height adjustment device and a rotary brake device. The motor height adjustment device can be the main body of the lawnmower, which includes a motor, a cutting mechanism, an energy storage mechanism, etc.

[0038] The motor height adjustment device includes a device housing 11, a motor housing 12, a threaded post 13, a guide device, and a bearing 15.

[0039] The motor housing contains a motor, and the front end of the motor housing has a screw hole 16 that matches the threaded post 13.

[0040] exist Figure 1 and Figure 2 The middle front refers to the left side of the image.

[0041] The device housing has a mounting hole that matches the shape of the motor housing. The motor housing is positioned in the mounting hole via the guide device, and the guiding direction of the guide device is parallel to the axial direction of the threaded column.

[0042] The bottom of the threaded column is connected to the bottom of the mounting hole via the bearing. A knob is provided above the threaded column. The knob drives the threaded column to rotate. The rotation of the threaded column in the threaded hole causes the motor housing to move up or down.

[0043] The bottom of the device housing is provided with a lawnmower blade 17, which is fixed to the rotor of the motor.

[0044] The motor housing 12 includes a housing body 121, and the guiding device includes a guide protrusion 122. The guide protrusion is provided on both sides of the housing body, and the two sides of the mounting hole are provided with guide grooves 141 that match the guide protrusion. The guide protrusion is installed in the guide groove 141.

[0045] The front side of the housing body 121 is provided with a mounting protrusion 123, and the screw hole is provided in the mounting protrusion. Both the mounting protrusion and the guide protrusion are located at the top of the housing body.

[0046] Each side of the mounting protrusion is provided with a guide protrusion 122, and each side of the housing body is provided with a guide protrusion.

[0047] The guiding device includes a guide post 142, and each guide groove is provided with a guide post. The bottom of the guide post is located at the bottom of the device housing. The guide protrusion is provided with a through hole 124 that matches the guide post. A return spring 143 is provided on the guide post between the bottom of the device housing and the guide protrusion.

[0048] The inner ring of the bearing is fixed to the threaded post, and the outer ring of the bearing is fixed to the bottom of the mounting hole.

[0049] See Figure 4 , Figure 5 The knob braking device includes a knob body 21, a knob bottom ring 22, a knob cover plate 23, and several positioning beads 24.

[0050] The rotary brake device drives the spiral column 13 of the motor height adjustment device to rotate, and the spiral column 13 drives the motor in the motor height adjustment device to move up or down.

[0051] The lower end face of the bottom ring of the knob is provided with a ring of positioning holes 25;

[0052] The positioning beads are located on the upper surface 26 of the device housing of the motor height adjustment device and are matched with the position of the positioning hole. Each positioning bead is provided with a spring at its bottom.

[0053] The knob cover plate 23 has a hole. After the knob body passes through the knob cover plate, the knob cover plate is fixed to the upper surface of the device housing.

[0054] A limiting circular hole 27 is provided on the upper surface 26 of the device housing, and a limiting circular ring 28 is provided below the bottom circular ring of the knob, and the limiting circular ring is installed in the limiting circular hole.

[0055] A connecting post 29 is provided at the bottom center of the knob body, and two snap-fit ​​strips 30 are provided on the side of the connecting post. The top of the spiral post is provided with snap-fit ​​holes 31 that match the connecting post and the snap-fit ​​strips.

[0056] The bottom of the knob body is provided with a fixing post 32 between the connecting post and the limiting ring, and the top of the spiral post is provided with a fixing hole that matches the fixing post.

[0057] A scale is provided on the outside of the hole in the knob cover.

[0058] The number of positioning beads is 4, and the positioning beads can be the head of the ball plunger, which facilitates installation and production.

[0059] This embodiment can prevent the knob from turning randomly, making the rotation process more stable. At the same time, it uses sound or touch to sense the rotation angle, which facilitates angle control. It can be applied to adjust the height of the motor, thereby adjusting the height of the props, blades and other components at the front end of the motor. The structure is sturdy and stable, and it is suitable for high-power electrical products.

[0060] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A knob brake device for a motor height adjustment device of a lawn mower, characterized in that, The knob braking device includes a knob body, a knob bottom ring, a knob cover plate, and several positioning beads. The rotary brake device drives the screw column of the motor height adjustment device to rotate, and the screw column drives the motor in the motor height adjustment device to move up or down. The lower end face of the bottom ring of the knob is provided with a ring of positioning holes; The positioning beads are located on the upper surface of the housing of the motor height adjustment device and are matched with the position of the positioning hole. Each positioning bead has a spring at its bottom. The knob cover has a hole, and after the knob body passes through the knob cover, the knob cover is fixed to the upper surface of the device housing.

2. The knob brake device according to claim 1, wherein A limiting circular hole is provided on the upper surface of the device housing, and a limiting circular ring is provided below the bottom circular ring of the knob, with the limiting circular ring installed in the limiting circular hole.

3. The knob brake device of claim 2, wherein A connecting post is provided at the bottom center of the knob body, and two snap-fit ​​strips are provided on the side of the connecting post. The top of the spiral post is provided with snap-fit ​​holes that match the connecting post and the snap-fit ​​strips.

4. The knob brake device according to claim 3, wherein The bottom of the knob body is provided with a fixing post between the connecting post and the limiting ring, and the top of the spiral post is provided with a fixing hole that matches the fixing post.

5. The knob brake device of claim 1, wherein A scale is provided on the outside of the hole in the knob cover.

6. The knob brake device of claim 1, wherein The number of positioning beads is 4.

7. The knob brake device of claim 1, wherein The motor height adjustment device includes a motor housing, a guide device, and a bearing. The motor housing contains a motor, and the front end of the motor housing has a threaded hole that matches the threaded post. The device housing has a mounting hole that matches the shape of the motor housing. The motor housing is positioned in the mounting hole via the guide device, and the guiding direction of the guide device is parallel to the axial direction of the threaded column. The bottom of the threaded column is connected to the bottom of the mounting hole via the bearing. A knob is provided above the threaded column. The knob drives the threaded column to rotate. The rotation of the threaded column in the threaded hole causes the motor housing to move up or down.

8. The knob brake device of claim 7, wherein The motor housing includes a housing body, the guiding device includes a guiding protrusion, the guiding protrusion is provided on both sides of the housing body, and the two sides of the mounting hole are provided with guiding grooves that match the guiding protrusion, and the guiding protrusion is installed in the guiding groove; The front side of the housing body is provided with a mounting protrusion, and the screw hole is provided in the mounting protrusion. Both the mounting protrusion and the guide protrusion are located at the top of the housing body.

9. The knob brake device of claim 8, wherein A guide protrusion is provided on each side of the mounting protrusion, and a guide protrusion is provided on each side of the main body of the housing; The guiding device includes a guide post, and each guide groove is provided with a guide post. The bottom of the guide post is located at the bottom of the device housing. The guide protrusion is provided with a through hole that matches the guide post. A return spring is provided on the guide post between the bottom of the device housing and the guide protrusion.

10. A lawnmower characterised in that, The lawnmower includes a rotary brake as described in any one of claims 1 to 9.

Images