Pruner output shaft

Abstract

The utility model discloses a pruner output shaft which comprises a shaft body, a first bearing installation section and a second bearing installation section which are arranged at intervals are arranged on the shaft body, and a first step and a pruning head installation section are further arranged on the shaft body. The first step is arranged between the first bearing mounting section and the second bearing mounting section; the pruning head mounting section is arranged at one end of the shaft body and is used for being connected with a pruning head of the pruning machine; a flat key groove extending in the axial direction is formed in the circumferential wall of the branch trimming head installation section. The second step is positioned between the second bearing mounting section and the branch trimming head mounting section; the diameter of the section of the second step is larger than that of the section of the second bearing installation section. Compared with the prior art, the connecting device is firmly connected with the pruning machine, and noise and vibration in the operation process of the pruning machine can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of garden tools and equipment, specifically to an output shaft for a pruning machine. Background Technology

[0002] A pruning machine is a gardening tool used to trim tree branches. Currently, pruning machines are widely used in landscaping, where they are used to trim tree branches, thereby beautifying the environment and protecting greenery.

[0003] The power source for the pruning machine is an electric motor. For example, Chinese invention application No. 201711318200.1 (publication number CN109906795A) discloses a pruning machine, which includes a housing, a motor, a motor shaft, an eccentric part, an upper blade, a lower blade, and a transmission mechanism. One end of the motor shaft is connected to the motor and rotates around a first axis, while the eccentric part is located at the other end of the motor shaft. The transmission mechanism connects the eccentric part to the upper and lower blades and includes a gear mechanism, an output shaft, and a connecting assembly. The gear mechanism includes an internal gear ring whose axis coincides with the first axis and a planetary gear with fewer teeth than the internal gear ring. The planetary gear is sleeved on the eccentric part and meshes with the internal gear ring under the drive of the eccentric part. The output shaft is connected to the planetary gear. The connecting assembly connects the output shaft to the upper and lower blades, driving the upper and lower blades to reciprocate along a first linear direction. The gear mechanism in the transmission mechanism of this pruning machine has a large transmission ratio, which can reduce one stage of gear transmission and reduce the size and weight of the pruning machine.

[0004] This pruning machine connects the motor and the transmission mechanism by setting an eccentric part at one end of the motor shaft; however, the eccentric part alone cannot make the motor and the transmission mechanism tightly integrated, and the connection is not strong enough; in addition, when the motor shaft is connected to other components of the motor, there will inevitably be assembly gaps, resulting in greater vibration and noise from the pruning machine. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a pruning machine output shaft that is firmly connected to the pruning machine and can reduce the noise and vibration during the operation of the pruning machine, in view of the above-mentioned technical status.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problem is as follows: a pruning machine output shaft, including a shaft body, on which a first bearing mounting section and a second bearing mounting section are provided at intervals, characterized in that: the shaft body is further provided with:

[0007] The first step is located between the first bearing mounting section and the second bearing mounting section;

[0008] A pruning head mounting section is located at one end of the shaft and is used to connect with the pruning head of the pruning machine; the peripheral wall of the pruning head mounting section is provided with an axially extending flat keyway; and,

[0009] The second step is located between the second bearing installation section and the pruning head installation section; the cross-sectional diameter of the second step is larger than that of the second bearing installation section.

[0010] To limit the axial movement of the pruning head, preferably, the pruning head mounting section is also provided with a retaining spring groove for mounting a retaining spring.

[0011] Preferably, the cross-sectional diameter of the second step is larger than the cross-sectional diameter of the pruning head installation section. The second step abuts against the second bearing installation section, which can prevent the bearing from moving axially.

[0012] To facilitate bearing installation, preferably, the cross-sectional diameter of the first step is smaller than the cross-sectional diameter of the first bearing mounting section and the second bearing mounting section.

[0013] Preferably, the shaft body is further provided with a connecting section located at the other end of the shaft body, and the peripheral wall of the connecting section is provided with external threads.

[0014] Preferably, the shaft body is further provided with a flat section for mounting a pulley thereon, and the flat section has two flat sections arranged in parallel with each other.

[0015] To prevent damage to the internal threads during external cylindrical grinding of the first and second bearing mounting sections, preferably, one end of the shaft body is provided with a countersunk hole, the peripheral wall of which is provided with internal threads.

[0016] Preferably, the outer diameter of the first bearing mounting section is 17mm ± 0.027mm.

[0017] Preferably, the outer diameter of the second bearing mounting section is 17mm ± 0.027mm.

[0018] Compared with the prior art, the advantages of this utility model are as follows: the first step is located between the first bearing mounting section and the second bearing mounting section, which facilitates the installation of the bearing and can limit the position of the power output structure, ensure the stability of the power system during operation, and improve the service life of the output shaft; the peripheral wall of the pruning head mounting section is provided with an axially extending flat keyway, which can be clearance-fitted with the inner keyway of the pruning head, making the connection firm and facilitating the circumferential fixation of the pruning head mounting section and the transmission structure to stably transmit torque and reduce circumferential vibration during the operation of the pruning machine; the cross-sectional diameter of the second step is larger than the cross-sectional diameter of the second bearing mounting section, which can prevent the axial movement of the bearing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment;

[0020] Figure 2 for Figure 1 Sectional view at point AA;

[0021] Figure 3 for Figure 1 Sectional view at BB. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1-3 The diagram shows a preferred embodiment of the present invention. The output shaft of the pruning machine includes a shaft body 100, which, from the first end a to the second end b, sequentially includes a connecting section 6, a flat section 7, a first bearing mounting section 1, a first step 3, a second bearing mounting section 2, a second step 5, and a pruning head mounting section 4.

[0024] The first bearing mounting section 1 and the second bearing mounting section 2 are spaced apart from each other. A first step 3 is located between the first bearing mounting section 1 and the second bearing mounting section 2. The cross-sectional diameter of the first step 3 is smaller than the cross-sectional diameter of the first bearing mounting section 1 and the second bearing mounting section 2. The outer diameter of the first bearing mounting section 1 is 17mm ± 0.027mm, and its surface roughness is Ra 3.2um. The outer diameter of the second bearing mounting section 2 is 17mm ± 0.027mm, and its surface roughness is Ra 3.2um.

[0025] The pruning head mounting section 4 is located at one end of the shaft body 100 and is used to connect with the pruning head of the pruning machine. The peripheral wall of the pruning head mounting section 4 is provided with an axially extending flat keyway 41. The pruning head mounting section 4 also has a snap ring groove 42 for installing a snap ring, which, after installation, serves to limit the axial movement of the pruning head. The axial length of the flat keyway 41 is 89.5 mm. The pruning head can be adjusted in position relative to the flat keyway 41 according to actual usage conditions to meet different application scenarios.

[0026] The second step 5 is located between the second bearing mounting section 2 and the pruning head mounting section 4; the cross-sectional diameter of the second step 5 is larger than that of the second bearing mounting section 2. The cross-sectional diameter of the second step 5 is larger than that of the pruning head mounting section 4.

[0027] The connecting section 6 is located at one end of the shaft body 100 and its peripheral wall is provided with external threads, the specification of which is M10-6g. The other end of the shaft body 100 is provided with a countersunk hole 43, and the peripheral wall of the countersunk hole 43 is provided with internal threads 44, the specification of which is M8-6H. The setting of the internal thread 44 in the countersunk hole 43 can lock the support ring of the pruning machine, reduce the radial swing of the output end, not only reduce noise, but also prevent fatigue fracture after long-term operation.

[0028] The flat section 7 is for mounting the pulley, and has two parallel flat sections 71. The thickness of the flat section 7 is 10.2±0.1mm.

[0029] The output shaft of the pruning machine in this embodiment is made of 40Cr alloy structural steel and is manufactured using a quenching and tempering process. The hardness reaches HRC22-28, thus ensuring the required torque and strength. Furthermore, the entire shaft surface is treated with white zinc plating, and it meets the requirement of not rusting for 96 hours in a neutral salt spray test.

Claims

1. A pruning machine output shaft, comprising a shaft body (100), wherein a first bearing mounting section (1) and a second bearing mounting section (2) are provided on the shaft body (100) at intervals from each other, characterized in that: The shaft (100) is also provided with: The first step (3) is located between the first bearing mounting section (1) and the second bearing mounting section (2); A pruning head mounting section (4) is located at one end of the shaft body (100) and is used to connect with the pruning head of the pruning machine; the peripheral wall of the pruning head mounting section (4) is provided with an axially extending flat keyway (41); and, The second step (5) is located between the second bearing installation section (2) and the pruning head installation section (4); the cross-sectional diameter of the second step (5) is greater than the cross-sectional diameter of the second bearing installation section (2).

2. The output shaft of the pruning machine according to claim 1, characterized in that: The pruning head installation section (4) is also provided with a retaining ring groove (42) for installing retaining rings.

3. The output shaft of the pruning machine according to claim 1, characterized in that: The cross-sectional diameter of the second step (5) is greater than the cross-sectional diameter of the pruning head installation section (4).

4. The output shaft of the pruning machine according to claim 1, characterized in that: The cross-sectional diameter of the first step (3) is smaller than that of the first bearing mounting section (1) and the second bearing mounting section (2).

5. The output shaft of the pruning machine according to claim 1, characterized in that: The shaft (100) is also provided with a connecting section (6) located at the other end of the shaft (100), and the peripheral wall of the connecting section (6) is provided with external threads.

6. The output shaft of the pruning machine according to claim 1, characterized in that: The shaft body (100) is also provided with a flat section (7) for mounting a pulley thereon, and the flat section (7) is provided with two flat sections (71) arranged in parallel with each other.

7. The output shaft of the pruning machine according to claim 1, characterized in that: One end of the shaft (100) is provided with a countersunk hole (43), and the peripheral wall of the countersunk hole (43) is provided with an internal thread (44).

8. The output shaft of the pruning machine according to any one of claims 1-7, characterized in that: The outer diameter of the first bearing mounting section (1) is 17mm ± 0.027mm.

9. The output shaft of the pruning machine according to any one of claims 1-7, characterized in that: The outer diameter of the second bearing mounting section (2) is 17mm ± 0.027mm.

Images