Grass mowing disc mounting structure
By adopting spline connections and ratchet-elastic movable tongue structure in the mower, the problem of complex and undustrous adjustment of existing mowers is solved, achieving a simple and durable height adjustment effect.
Patent Information
- Application Number
- CN202420918784.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-04-29
AI Technical Summary
The adjustment structure of existing mower trays is complex and not durable, especially inconvenient to operate when covered with crushed grass powder.
Splined connection to the transmission sleeve and the grass head, and the rotating transmission and radial connection are achieved through the structure of the ratchet groove and the elastic movable tongue. The one-way sliding and limiting groove design of the elastic movable tongue simplifies the grass head Height adjustment.
The height adjustment is achieved without the need for additional buttons or press plates, making the structure more durable and simplifies the operation process.
Smart Images
Figure CN222216479U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of grass trimmers, in particular to a grass trimmer disc installation structure. Background Art
[0002] Reference for lawn mower disc Figure 1 As shown, the mowing head is fixedly connected by the transmission shaft 1, the transmission sleeve 2 and the mowing head. Most of them are fixed. Even if they can be adjusted up and down, the structure is very complicated and unreliable, or not durable, or difficult to adjust. For example, some adjustments need to be made by operating the knob or push plate at the bottom of the mowing head, but the upper and lower surfaces of the mowing head are covered with grass powder during use, which is extremely inconvenient to operate. Utility Model Content
[0003] The purpose of the utility model is to provide a mowing disc installation structure to solve the problems raised in the above background technology.
[0004] In order to solve the above technical problems, the utility model provides the following technical solutions: a grass cutting disc installation structure, including a transmission sleeve and a grass cutting head, the grass cutting head and the transmission sleeve are circumferentially splined to achieve rotational transmission, and the radial connection structure between the grass cutting head and the transmission sleeve includes a ratchet groove and an elastic movable tongue, one end of the elastic movable tongue is embedded in the ratchet groove, and through the setting of the ratchet groove wall path, the elastic movable tongue can only slide upward in one direction in the ratchet groove.
[0005] Preferably, the ratchet groove consists of a vertical groove and an oblique groove, the oblique groove is arranged at intervals on one side of the vertical groove, and the groove wall of the oblique groove consists of a long arc edge and a short arc edge, wherein the long arc edge is located above the short arc edge, thereby forming an inclined slot hole structure, and the elastic movable tongue can slide upward along the long arc edge, but is blocked by the short arc edge from sliding downward.
[0006] Preferably, the elastic movable tongue includes a groove wheel and a movable arm connected to one side of the groove wheel, the movable arm is embedded in the ratchet groove, and a first limiting groove is provided on the groove wheel, one side of which is provided with an elastic sheet. The elastic sheet squeezes the groove wheel under normal conditions so that the movable arm has a tendency to swing toward one side of the inclined groove.
[0007] Preferably, an outer bevel groove is provided on the side above the saw vertical groove close to the bevel groove, an inner bevel groove is provided on the side below the vertical groove close to the bevel groove, and a second limiting groove is also provided on the circumferential surface of the groove wheel, and the second limiting groove is located on one side of the first limiting groove.
[0008] Compared with the prior art, the beneficial effects of the utility model are:
[0009] The utility model can realize height adjustment of the grass trimmer head without the need for additional actuators such as buttons or pressure plates through the self-locking structure of the elastic movable tongue and the ratchet groove, and the overall structure is located inside the connection, which is more durable. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0011] Figure 2 It is a schematic diagram of the cooperation between the ratchet groove and the elastic movable tongue of the utility model;
[0012] Figure 3 This is a schematic diagram of the elastic movable tongue structure of the utility model. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0014] See also Figure 1 as well as Figure 2 As shown, it includes a transmission sleeve 2 and a grass trimming head 3. The grass trimming head 3 and the transmission sleeve 2 are connected by splines in the circumference to achieve rotational transmission. For example, a plurality of vertical splines are arranged on the transmission sleeve 2, and matching spline grooves are arranged on the inner wall of the grass trimming head 3, and the two are plugged into each other.
[0015] The radial connection structure between the mowing head 3 and the transmission sleeve 2 includes a ratchet groove 31 and an elastic movable tongue, one end of which is embedded in the ratchet groove 31. Through the setting of the groove wall path of the ratchet groove 31, the elastic movable tongue can only slide upward in one direction in the ratchet groove 31.
[0016] The ratchet groove 31 and the elastic movable tongue 21 are respectively arranged on the grass trimming head 3 or the transmission sleeve 2. In this embodiment, preferably, the ratchet groove 31 is arranged on the grass trimming head 3, and the elastic movable tongue 21 is arranged on the transmission sleeve 2. The arrangement may also be reversed. It is worth mentioning that when the ratchet groove 31 is arranged on the grass trimming head 3, the ratchet groove 31 needs to be arranged in the form of a blind groove (i.e., a non-through groove) to prevent the groove from penetrating the outer wall of the grass trimming head 3, which can play a protective role.
[0017] Specific reference Figure 2 as well as Figure 3 As shown, the ratchet groove 31 consists of a vertical groove and an oblique groove, the oblique groove is arranged at one side of the vertical groove, and the groove wall of the oblique groove consists of a long arc edge and a short arc edge, wherein the long arc edge is located above the short arc edge, thereby forming an inclined slot hole structure, and the elastic movable tongue can slide upward along the long arc edge, but is blocked by the short arc edge from sliding downward.
[0018] The elastic movable tongue includes a groove wheel 21 and a movable arm 22 connected to one side of the groove wheel 21, the movable arm 22 is embedded in the ratchet groove 31, the groove wheel 21 is rotatably connected to the side wall of the transmission sleeve 2, and a first limiting groove 24 is provided on the groove wheel 21, and an elastic sheet 25 is provided on one side thereof, one end of the elastic sheet 25 is a fixed end connected to the side wall of the transmission sleeve 2 and the other end is a free end for providing elastic force. The elastic sheet 25 squeezes the groove wheel 21 under normal conditions, so that the movable arm 22 has a tendency to swing toward one side of the inclined groove.
[0019] An outer inclined groove 32 is provided on one side of the vertical groove near the inclined groove, and an inner inclined groove 33 is provided on one side of the vertical groove near the inclined groove. A second limiting groove 23 is also provided on the circumferential surface of the groove wheel 21, and the second limiting groove 23 is located on one side of the first limiting groove 24.
[0020] When using, refer to Figure 2 As shown, at this time, the grass trimming head 3 is located in the lowest working position. If it is necessary to adjust it upward, the grass trimming head 3 can be directly lifted upward from the outside, and the movable arm 22 swings along the inclined groove. At this time, the spring piece 25 is always in the first limiting groove 24, and the first limiting groove is composed of two inclined groove walls. The free end of the spring piece 25 abuts against the groove wall below, so that the movable arm 22 has a tendency to reset to the right to achieve self-locking in the inclined groove. When the grass trimming head 3 rises to the highest chute, if the position needs to be readjusted, it continues to slide upward, and the movable arm 22 passes through the outer chute 32, which happens to be at the end of the long chute, so the spring piece 25 is at the limit position of the first limit groove 24, and then passes through the outer chute 32, and the free end of the spring piece 25 enters the second limit groove 23 and is fixed. At this time, the movable arm 22 is located in the vertical groove, and the grass trimming head 3 has no limit in the vertical direction, and can slide directly to the bottom of the vertical groove. When the movable arm 22 passes through the inner chute 33, the groove wheel 21 swings to the right due to the change in path, and the spring piece 25 returns to the first limit groove 24. At this time, the height adjustment can continue to be performed upward in sequence.
[0021] In summary, the installation method of the mowing disc of this embodiment is simpler and more effective, and only sliding is required for adjustment. In actual operation, it is only necessary to control the sliding resistance between the ratchet groove 31 and the movable arm 22, and the mowing head 3 will not be accidentally bumped and raised during normal use. In addition, there is usually a guard plate at the bottom of the mowing disc during installation, so even if it is used on a mowing vehicle, the mowing head will not be accidentally bumped and raised due to the terrain. If it is used on a handheld mower, this situation will not occur.
[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A mowing disc installation structure, characterized in that: The utility model comprises a transmission sleeve (2) and a grass trimming head (3), wherein the grass trimming head (3) and the transmission sleeve (2) are connected in the circumferential direction by a spline to realize rotational transmission, and the radial connection structure between the grass trimming head (3) and the transmission sleeve (2) comprises a ratchet groove (31) and an elastic movable tongue, wherein one end of the elastic movable tongue is embedded in the ratchet groove (31), and through the setting of the groove wall path of the ratchet groove (31), the elastic movable tongue can only slide upward in the ratchet groove (31) in one direction.
2. A mowing disc installation structure according to claim 1, characterized in that: The ratchet groove (31) consists of a vertical groove and an oblique groove, wherein the oblique groove is arranged at intervals on one side of the vertical groove, and the groove wall of the oblique groove consists of a long arc side and a short arc side, wherein the long arc side is located above the short arc side, thereby forming an inclined slot hole structure, and the elastic movable tongue can slide upward along the long arc side, but is blocked by the short arc side from sliding downward.
3. A mowing disc installation structure according to claim 2, characterized in that: The elastic movable tongue comprises a groove wheel (21) and a movable arm (22) connected to one side of the groove wheel (21); the movable arm (22) is embedded in the ratchet groove (31); a first limiting groove (24) is provided on the groove wheel (21); an elastic sheet (25) is provided on one side of the first limiting groove; the elastic sheet (25) presses the groove wheel (21) in a normal state, so that the movable arm (22) has a tendency to swing toward one side of the inclined groove.
4. A mowing disc installation structure according to claim 3, characterized in that: An outer inclined groove (32) is arranged on one side of the vertical groove close to the inclined groove, and an inner inclined groove (33) is arranged on one side of the vertical groove close to the inclined groove. A second limiting groove (23) is also arranged on the circumferential surface of the groove wheel (21), and the second limiting groove (23) is located on one side of the first limiting groove (24).