A power mechanism for a trimmer

Abstract

The utility model relates to a kind of power mechanisms for trimmer, including motor, eccentric wheel group, the blade assembly connected with eccentric wheel group, and the transmission assembly of driving eccentric wheel group rotation, it is provided with smooth piece between eccentric wheel group and blade assembly.The utility model's eccentric wheel group and the service life of blade are high, stable in operation, and later replacement and maintenance cost are low.

Description

Technical Field

[0001] This utility model relates to the field of pruning equipment technology, specifically to a power mechanism for a pruning machine. Background Technology

[0002] An electric pruning machine is a gardening tool used to prune various shrubs, hedges, and other outdoor plants. For example, Chinese utility model patent application number CN201420356592.6 discloses a pruning machine drive mechanism. Its left and right eccentric wheels are symmetrically arranged on a horizontal plane around a rotating shaft and are stacked and staggered vertically. Upper and lower blades are staggered, with one end of each blade fitted over the left and right eccentric wheels, respectively. When the left eccentric wheel rotates around the shaft, it abuts against the inner wall of the opening at one end of the upper blade, thus driving the upper blade to reciprocate. The same applies to the right eccentric wheel and the lower blade.

[0003] In the reciprocating motion of the aforementioned blade, the eccentric wheel and the inner wall of the opening at one end of the blade undergo hard friction sliding. Over a long period of operation, this will cause significant wear to both the eccentric wheel and the inner wall of the blade opening, reducing their service life and resulting in high replacement and maintenance costs. Summary of the Invention

[0004] This utility model provides a power mechanism for a trimmer, which features an eccentric wheel assembly and blades with a long service life, stable operation, and low replacement and maintenance costs.

[0005] To solve the above problems, this utility model provides a power mechanism for a trimmer, including a motor, an eccentric wheel assembly, a blade assembly connected to the eccentric wheel assembly, and a transmission assembly that drives the eccentric wheel assembly to rotate. A smoothing element is provided between the eccentric wheel and the blade assembly.

[0006] Furthermore, the eccentric wheel assembly includes an upper eccentric wheel, a lower eccentric wheel, and a disk located between the upper eccentric wheel and the lower eccentric wheel. The upper eccentric wheel and the lower eccentric wheel are centrally symmetrically distributed around the center of the disk and are located on the upper and lower surfaces of the disk, respectively.

[0007] Furthermore, the diameter of the disk is greater than the farthest distance between the upper and lower eccentric wheels projected onto the horizontal plane.

[0008] Furthermore, multiple smoothing components are provided and are sleeved on the upper eccentric wheel and the lower eccentric wheel.

[0009] Furthermore, the smoothing component is a ball bearing.

[0010] Furthermore, the transmission assembly includes a toothed groove on the disc and a gear fixed to the output shaft of the motor, wherein the gear meshes with the toothed groove.

[0011] Furthermore, the blade assembly includes an upper blade and a lower blade, each having a through hole at one end, and is respectively fitted onto the smoothing components above and below the disc.

[0012] Furthermore, the upper and lower blades are spaced far apart and arranged parallel to each other.

[0013] The beneficial effects of this utility model are: the smoothing component avoids direct contact between the blade assembly and the eccentric wheel assembly, increasing the service life of both the eccentric wheel assembly and the blade assembly; at the same time, the smoothing component reduces friction and increases smoothness between the blade assembly and the eccentric wheel assembly, which is more conducive to power transmission and ensures the cutting effect of the blade assembly. Attached Figure Description

[0014] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0015] Figure 1 A schematic diagram used to illustrate the positional relationship between the power housing and the motor;

[0016] Figure 2 A schematic diagram illustrating the internal structure of the power unit casing;

[0017] Figure 3 An exploded diagram used to illustrate the internal structure of the power unit casing;

[0018] Figure 4 A schematic diagram used to illustrate the collar structure.

[0019] Explanation of reference numerals in the attached figures: 1. Motor; 2. Eccentric wheel assembly; 21. Upper eccentric wheel; 22. Lower eccentric wheel; 23. Disc; 3. Blade assembly; 31. Upper blade; 32. Lower blade; 33. Through hole; 4. Transmission assembly; 41. Gear; 5. Smoothing component; 6. Power housing; 7. Collar. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0021] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Example 1

[0022] like Figures 1 to 3 As shown, a power mechanism for a trimmer includes a motor 1, an eccentric wheel assembly 2, a blade assembly 3 connected to the eccentric wheel assembly 2, and a transmission assembly 4 that drives the eccentric wheel assembly 2 to rotate. A smoothing element 5 is provided between the eccentric wheel assembly 2 and the blade assembly 3.

[0023] like Figure 1 and Figure 2 As shown, in use, the eccentric wheel assembly 2 and the transmission component 4 are arranged inside the power housing 6 of the trimmer, while the motor 1 is located outside the power housing 6. Figure 3 As shown, the eccentric wheel assembly 2 includes an upper eccentric wheel 21, a lower eccentric wheel 22, and a disc 23 located between the upper eccentric wheel 21 and the lower eccentric wheel 22. The upper eccentric wheel 21 and the lower eccentric wheel 22 are centrally symmetrically distributed about the center of the disc 23 and are located on the upper and lower surfaces of the disc 23, respectively. The upper eccentric wheel 21 and the lower eccentric wheel 22 are fixed to the upper and lower surfaces of the disc 23, respectively. In this embodiment, the fixing method is integral molding. The upper eccentric wheel 21 and the lower eccentric wheel 22 are centrally symmetrically arranged to ensure that the force on the central axis of the disc 23 is uniform when the disc 23 rotates, thus ensuring the service life and performance of the disc 23.

[0024] like Figure 2 As shown, the diameter of the disc 23 is greater than the farthest distance between the upper eccentric wheel 21 and the lower eccentric wheel 22 projected onto the horizontal plane. The transmission assembly 4 includes a toothed groove on the disc 23 and a gear 41 fixed to the output shaft of the motor 1. The gear 41 meshes with the toothed groove. The outer edges of the upper eccentric wheel 21 and the lower eccentric wheel 22 do not exceed the periphery of the disc 23, ensuring that the gear 41 is in a stable and safe state when driving the disc 23 to rotate. Both the upper eccentric wheel 21 and the lower eccentric wheel 22 are fixed to the disc 23. When the motor 1 drives the gear 41, and thus drives the disc 23 to rotate, the force generated acts directly on the disc 23, reducing the loss of the force on the output shaft of the motor 1, ensuring the rotation efficiency of the disc 23, and thus ensuring the cutting effect and quality of the blade assembly 3.

[0025] like Figure 3As shown, multiple smoothing components 5 are provided and are sleeved on the upper eccentric wheel 21 and the lower eccentric wheel 22. In this embodiment, the smoothing component 5 is a ball bearing, which is used to reduce the direct wear between the upper eccentric wheel 21 and the lower eccentric wheel 22 and the blade assembly 3. The blade assembly 3 includes an upper blade 31 and a lower blade 32. One end of the upper blade 31 and the lower blade 32 are provided with a through hole 33, and they are respectively sleeved on the smoothing components 5 above and below the disc 23. The side wall of the through hole 33 of the upper blade 31 abuts against the ball bearing. On the outer wall of the bearing, the ball bearing above the disc 23 can avoid direct friction between the upper eccentric wheel 21 and the upper blade 31, making the upper blade 31 run more smoothly and smoothly under the drive of the upper eccentric wheel 21, greatly improving the operating efficiency of the upper blade 31, while also reducing the wear of the upper eccentric wheel 21 and the upper blade 31, and increasing the service life of the upper eccentric wheel 21 and the upper blade 31. The cooperation between the lower blade 32 and the lower eccentric wheel 22 is similar to the cooperation between the upper blade 31 and the upper eccentric wheel 21.

[0026] like Figure 3 As shown, the upper blade 31 and the lower blade 32 are spaced far apart and arranged parallel to each other. This part of the upper blade 31 and the lower blade 32 is located inside the power housing 6. This arrangement provides space for the eccentric wheel assembly 2 and the transmission assembly 4, which facilitates the installation and subsequent maintenance of the eccentric wheel assembly 2 and the transmission assembly 4.

[0027] The specific working principle and process are as follows: Motor 1 is installed on the outer surface of the power housing 6, and the output shaft of motor 1 is located inside the motor housing. When motor 1 starts, the output shaft of motor 1 drives the disc 23 to rotate under the cooperation of gear 41 and tooth groove. A central shaft is fixedly inserted in the center of the disc 23. The central shaft is arranged inside the power housing 6 and rotates in connection with the power housing 6. The disc 23 rotates around the central shaft. The upper eccentric wheel 21 and the lower eccentric wheel 22 move together with the disc 23. In actual use, the upper blade 31 and the lower blade 32 are restricted to reciprocating in only one direction. The upper eccentric wheel 21 rotates around the central shaft. When the upper eccentric wheel 21 moves, it will drive the upper blade 31 to reciprocate. The cooperation between the lower eccentric wheel 22 and the lower blade 32 is similar to that between the upper eccentric wheel 21 and the upper blade 31. Therefore, the lower eccentric wheel 22 will also drive the lower blade 32 to reciprocate. With the cooperation of the upper blade 31 and the lower blade 32, the trimming of the object to be trimmed is achieved.

[0028] A ball bearing is arranged on the upper eccentric wheel 21. The ball bearing partially abuts against the inner wall of the through hole 33 of the upper blade 31. The ball bearing reduces friction and reduces direct wear between the upper eccentric wheel 21 and the upper blade 31. It also reduces energy conversion loss between the upper eccentric wheel 21 and the upper blade 31, greatly improving the working efficiency of the upper blade 31. Similarly, the lower blade 32 and the lower eccentric wheel 22 are also treated the same way. Example 2

[0029] The difference between this embodiment and Embodiment 1 is that the smoothing component 5 uses a graphite copper sleeve. The graphite copper sleeve has advantages such as long service life and good lubrication effect. By fitting the graphite copper sleeve onto the upper eccentric wheel 21 and the lower eccentric wheel 22, the friction between the eccentric wheel assembly 2 and the blade assembly 3 is reduced, making the movement of the eccentric wheel assembly 2 in the through hole 33 smoother, reducing the wear between the eccentric wheel assembly 2 and the blade assembly 3, and improving the service life of the eccentric wheel assembly 2 and the blade assembly 3. In addition, the graphite copper sleeve has a long load-bearing capacity and service life, which can greatly increase the service life of the power mechanism and reduce the number of maintenance times and maintenance costs in the later stage. Example 3

[0030] The difference from Embodiment 1 is that the smoothing component 5 used in this embodiment is a collar 7 with an arc-shaped protrusion. This type of method reduces the contact area with the blade assembly 3, thereby reducing the friction between the eccentric wheel group 2 and the blade assembly 3. The collar 7 is sleeved on the upper eccentric wheel 21 and the lower eccentric wheel 22. The arc-shaped protrusion avoids direct contact between the eccentric wheel group 2 and the blade assembly 3. At the same time, it also reduces the friction between the eccentric wheel group 2 and the blade assembly 3 to a certain extent, reduces the kinetic energy consumption of the blade assembly 3 by the eccentric wheel group 2, and ensures the operating effect and quality of the blade assembly 3. Moreover, since the material loss is mainly concentrated on the collar 7 and the blade assembly 3, it also reduces the later maintenance and replacement costs.

[0031] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0032] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A power mechanism for a pruning machine, characterized in that, It includes a motor (1), an eccentric wheel assembly (2), a blade assembly (3) connected to the eccentric wheel assembly (2), and a transmission assembly (4) that drives the eccentric wheel assembly (2) to rotate. A smoothing element (5) is provided between the eccentric wheel assembly (2) and the blade assembly (3).

2. The power mechanism for a pruning machine according to claim 1, characterized in that, The eccentric wheel assembly (2) includes an upper eccentric wheel (21), a lower eccentric wheel (22), and a disk (23) located between the upper eccentric wheel (21) and the lower eccentric wheel (22). The upper eccentric wheel (21) and the lower eccentric wheel (22) are centrally symmetrically distributed with respect to the center of the disk (23) and are located on the upper and lower surfaces of the disk (23), respectively.

3. The power mechanism for a pruning machine according to claim 2, characterized in that, The diameter of the disk (23) is greater than the farthest distance between the upper eccentric wheel (21) and the lower eccentric wheel (22) on the horizontal plane.

4. The power mechanism for a pruning machine according to claim 2, characterized in that, Multiple smoothing components (5) are provided and are sleeved on the upper eccentric wheel (21) and the lower eccentric wheel (22).

5. The power mechanism for a pruning machine according to claim 2, characterized in that, The smoothing component (5) is a ball bearing.

6. The power mechanism for a pruning machine according to claim 2, characterized in that, The transmission assembly (4) includes a toothed groove on a disc (23) and a gear (41) fixed on the output shaft of the motor (1), and the gear (41) meshes with the toothed groove.

7. The power mechanism for a pruning machine according to claim 2, characterized in that, The blade assembly (3) includes an upper blade (31) and a lower blade (32). One end of the upper blade (31) and the lower blade (32) are provided with a through hole (33), and they are respectively fitted onto the smoothing parts (5) above and below the disc (23).

8. The power mechanism for a pruning machine according to claim 7, characterized in that, The upper blade (31) and the lower blade (32) are spaced far apart and arranged parallel to each other.

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