Mower cutting lifting device and mower

Abstract

The utility model discloses a hay mower cutting lifting device which comprises a lifting device body used for driving a cutting mechanism to ascend and descend, the lifting device body comprises a rotating block, a threaded cylinder and a rotating block cover plate, the cutting mechanism is fixedly installed at the bottom of the threaded cylinder, the rotating block is in threaded connection with the threaded cylinder, and a plurality of circular grooves are formed in the rotating block cover plate. A shifting bead is arranged at the top of the rotating block, and the shifting bead is elastically embedded into the circular groove when the rotating block is rotated by external force. The utility model further discloses a mower which is provided with the lifting device. On the basis that height adjustment of the motor and the mowing cutting mechanism is achieved in a rotating mode, clear vibration feedback is formed in the rotating process through the poking balls and the circular grooves which are arranged in the rotating circumferential direction in a matched mode, the height adjustment hand feeling of a user is effectively improved, and accurate positioning of the height adjustment gear of the user is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of height adjustment of lawn mowers, and in particular relates to a lawn mower cutting lifting device and a lawn mower. Background Art

[0002] In order to enable the mowing and cutting mechanism to cut vegetation at different heights, a height adjustment mechanism is usually provided on the housing of the mower. The existing height adjustment mechanism of the mower mainly includes a lifting motor and a lifting rod, and the lifting rod is connected to the mowing and cutting mechanism. When the height of the mowing and cutting mechanism needs to be adjusted, the mower drives the lifting rod to adjust the height through the lifting motor, thereby controlling the ground clearance of the mowing and cutting mechanism.

[0003] In the above existing solutions, the use of a lifting motor to control the height adjustment increases the manufacturing cost of the lawn mower. Therefore, in order to reduce costs, the common height adjustment structure of lawn mowers on the market still uses manual height adjustment. However, the manual height adjustment structure of lawn mowers on the market currently has a poor feel. During the height adjustment process, the resistance is either too large or too small, and there is a lack of height adjustment feedback, resulting in a poor user experience. In addition, during the manual adjustment process, it is difficult to accurately identify and locate the high-level adjustment. Utility Model Content

[0004] The utility model aims to increase the adjustment accuracy and adjustment feel of the lifting and lowering gears of a lawn mower cutting and lifting device, and provides a lawn mower cutting and lifting device and a lawn mower.

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

[0006] A lawn mower cutting and lifting device comprises a lifting device for driving a cutting mechanism to rise and fall, the lifting device comprises a rotating block, a threaded barrel and a rotating block cover plate, the cutting mechanism is fixedly mounted on the bottom of the threaded barrel, the rotating block is threadedly connected to the threaded barrel, a plurality of circular grooves are arranged on the rotating block cover plate, a ball is arranged on the top of the rotating block, and an external force rotates the rotating block so that the ball elastically embeds into the circular groove.

[0007] Furthermore, the lifting device also includes a rotatable knob, which is coaxially fixedly connected to the rotating block, and the rotating block is driven to perform synchronous rotation when the knob is rotated by an external force.

[0008] Furthermore, the rotating block is sleeved on the outer circumference of the threaded barrel, a thread is arranged on the outer circumferential wall of the threaded barrel, and a plurality of bosses cooperating with the thread are arranged on the inner circumferential wall of the rotating block.

[0009] Furthermore, a plurality of the bosses are distributed on the same horizontal plane along the circumference of the rotating block.

[0010] Furthermore, the number of the bosses is , which are evenly distributed on the same horizontal plane of the inner circumferential wall of the rotating block along the circumference of the rotating block.

[0011] Furthermore, the rotating block cover is arranged above the rotating block and the knob for rotating the rotating block, and a plurality of the circular grooves are distributed in a circular array on the rotating block cover with the rotating shaft of the rotating block as the center.

[0012] Furthermore, a cylindrical tube is arranged on the top of the rotating block, an opening for accommodating the shifting bead is formed on the top of the cylindrical tube, and the cylindrical tube is made of elastic material.

[0013] Furthermore, a motor driving the cutting mechanism is accommodated in a receiving cavity formed by the rotating block and the internal space of the threaded barrel.

[0014] Furthermore, the lifting device also includes an indicator plate, on which a height mark for indicating the lifting height of the cutting mechanism is arranged around the circumference of a knob for rotating the rotating block, and a pointer mark radially facing the height mark is arranged on the knob.

[0015] A lawn mower is provided with the above-mentioned lawn mower cutting and lifting device inside.

[0016] In summary, the utility model is beneficial in that:

[0017] The utility model realizes the height adjustment of the motor and the mowing cutting mechanism by rotating, and forms clear vibration feedback during rotation by means of the matching beads and circular grooves arranged in the rotating circumferential direction, which effectively improves the height adjustment feeling of the user and realizes the accurate positioning of the user for the high-level adjustment.

[0018] Furthermore, a height mark is provided on the rotating circumference, so that the user can intuitively obtain the rotation angle of the current operation and the currently adjusted height through the naked eye, so that the user can have more precise control during manual adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the lawn mower of the present utility model.

[0020] Figure 2 It is a structural schematic diagram of the motor lifting device.

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-section structure in.

[0022] Figure 4 for Figure 2 Schematic diagram of the explosion structure.

[0023] Figure 5 It is a structural diagram of the rotating block.

[0024] Markings in the figure: 11, upper casing; 12, lower casing; 13, cutting mechanism; 2, rotating block; 21, boss; 22, cylindrical barrel; 23, bead; 3, threaded barrel; 4, motor; 5, knob; 51, cover plate; 511, circular groove; 52, indicator plate; 512, height mark; 513, pointer mark. DETAILED DESCRIPTION

[0025] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0027] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0028] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0029] This embodiment discloses a cutting and lifting device for a lawn mower, wherein, with reference to Figure 1 and Figure 2 , including a motor 4 and a cutting mechanism 13, the power output end of the motor 4 faces downward, the cutting mechanism 13 is connected to the power output end, the motor 4 drives the cutting mechanism 13 to rotate, so as to drive the blade thereon to rotate. In this embodiment, when the height of mowing needs to be adjusted, the cutting mechanism 13 is lifted and lowered by lifting the motor 4. This height adjustment method does not require changing the connection relationship between the cutting mechanism 13 and the motor 4, thereby ensuring the stability of the high-speed cutting mechanism 13 structure.

[0030] Specifically, refer to Figure 3 and Figure 4 The lifting device includes a threaded barrel 3 and a rotating block 2, the motor 4 is fixedly installed in the threaded barrel 3, the threaded barrel 3 is arranged in the lawn mower, and can slide in the vertical direction, the outer peripheral wall of the threaded barrel 3 is provided with a thread, the rotating block 2 is sleeved on the outer periphery of the threaded barrel 3, and the inner peripheral wall of the rotating block 2 is provided with a boss 21, refer to Figure 5 The bosses 21 are preferably arranged in four numbers and are distributed at the same horizontal position along the circumference of the rotating block 2 . The bosses 21 can cooperate with the threads of the threaded barrel 3 , so that the rotating block 2 can rotate relative to the threaded barrel 3 .

[0031] like Figure 1 As shown, in this embodiment, the lawn mower includes an upper housing 11 and a lower housing 12, which are matched to form an overall outer shell of the lawn mower, and a threaded barrel 3 is installed in the outer shell. One of the lower housing 12 and the threaded barrel 3 is provided with a vertical slide groove, and the other is provided with a sliding portion that cooperates with the slide groove, so that the threaded barrel 3 can move up and down relative to the lower housing 12; the top of the upper housing 11 is connected to a knob 5 through a rotating shaft, and the rotating block 2 is coaxially fixedly connected with the knob 5, and then rotating the knob 5 can drive the rotating block 2 to rotate together. When the rotating block 2 rotates, the vertical movement of the threaded barrel 3 can be achieved through the matching relationship between the boss 21 and the thread, so as to realize the lifting and lowering of the motor 4.

[0032] Furthermore, a rotating block cover 51 is fixedly provided on the upper housing 11, and the rotating block cover 51 is located above the rotating block 2. A plurality of circular grooves 511 are provided on the rotating block cover 51, and each circular groove 511 is distributed in a circular array with the axis of the rotating block 2 as the center. Correspondingly, a cylindrical tube 22 is provided on the top of the rotating block 2, and the cylindrical tube 22 is provided with a circular groove opening upward, and a bead 23 is embedded in the top of the circular groove. The cylindrical tube 22 is made of elastic material, including but not limited to plastic, metal, resin, etc., so that the opening of the circular groove has a certain expansion deformation ability, and when the bead 23 is subjected to a downward force, it can move downward to a certain extent, and rebound upward when the force is unloaded.

[0033] The radial distance of the ball 23 relative to the axis of the rotating block 2 is the same as the radial distance of the circular groove 511 relative to the axis of the rotating block 2, so the ball 23 can be fitted and embedded in one of the circular grooves 511. When the rotating block 2 rotates, the ball 23 moves along the distribution direction of the circular grooves 511, and enters another adjacent circular groove 511 from one circular groove 511 in turn, and is squeezed when moving between the two adjacent circular grooves 511. The squeezing force is transmitted to the user's hand through the rotating block 2 and the knob 5, forming a damping feedback force, so that the user can roughly judge the degree of rotation.

[0034] Furthermore, an indicator plate 52 is also provided on the upper housing 11, and angle markings are arranged on the indicator plate 52 along the circumference of the knob 5, and a pointer marking 513 facing the angle marking is provided on the knob 5. Therefore, the user can clearly obtain the rotation angle of the knob 5 through the pointer marking 513 and the angle marking, and by converting the height position of the threaded barrel 3 into the angular position of the knob 5, the angle marking can also be set to correspond to the height marking 512 of the threaded barrel 3, so that the user can intuitively know the lifting height position of the motor 4.

[0035] Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

Claims

1. A lawn mower cutting and lifting device, comprising a lifting device for driving a cutting mechanism (13) to rise and fall, characterized in that: The lifting device comprises a rotating block (2), a threaded barrel (3) and a rotating block cover plate (51); the cutting mechanism (13) is fixedly mounted on the bottom of the threaded barrel (3); the rotating block (2) is threadedly connected to the threaded barrel (3); a plurality of circular grooves (511) are arranged on the rotating block cover plate (51); a shifting ball (23) is arranged on the top of the rotating block (2); an external force rotates the rotating block (2) so that the shifting ball (23) is elastically embedded in the circular groove (511).

2. The lawn mower cutting and lifting device according to claim 1, characterized in that: The lifting device further comprises a rotatable knob (5), wherein the knob (5) is coaxially fixedly connected to the rotating block (2), and an external force rotates the knob (5) to drive the rotating block (2) to perform synchronous rotational motion.

3. The lawn mower cutting and lifting device according to claim 1, characterized in that: The rotating block (2) is sleeved on the outer circumference of the threaded barrel (3); threads are arranged on the outer circumferential wall of the threaded barrel (3); and a plurality of bosses (21) cooperating with the threads are arranged on the inner circumferential wall of the rotating block (2).

4. The lawn mower cutting and lifting device according to claim 3, characterized in that: A plurality of bosses (21) are distributed on the same horizontal plane along the circumference of the rotating block (2).

5. The lawn mower cutting and lifting device according to claim 4, characterized in that: The number of the bosses (21) is four, and they are evenly distributed along the circumference of the rotating block (2) on the same horizontal plane of the inner circumferential wall thereof.

6. The lawn mower cutting and lifting device according to claim 1, characterized in that: The rotating block cover plate (51) is arranged above the rotating block (2) and between the rotating block (2) and the knob (5) used to rotate the rotating block (2), and a plurality of circular grooves (511) are arranged in a circular array on the rotating block cover plate (51) with the rotating axis of the rotating block (2) as the center.

7. The lawn mower cutting and lifting device according to claim 1, characterized in that: A cylindrical tube (22) is arranged on the top of the rotating block (2), an opening for accommodating the shifting bead (23) is formed on the top of the cylindrical tube (22), and the cylindrical tube (22) is made of elastic material.

8. The lawn mower cutting and lifting device according to claim 1, characterized in that: The motor (4) driving the cutting mechanism (13) is accommodated in a receiving cavity formed by the internal space of the rotating block (2) and the threaded cylinder (3).

9. The lawn mower cutting and lifting device according to claim 1, characterized in that: The lifting device further comprises an indicator plate (52), on which a height mark (512) for indicating the lifting height of the cutting mechanism (13) is arranged around the circumference of a knob (5) for rotating the rotating block (2), and a pointer mark (513) radially facing the height mark (512) is arranged.

10. A lawn mower, characterized in that: A lawn mower cutting and lifting device as described in any one of claims 1 to 9 is arranged inside.

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