CN212272989U

CN212272989U - Transmission mechanism for garden tool

Info

Publication number: CN212272989U
Application number: CN202020901015.6U
Authority: CN
Inventors: 王成; 熊晓华; 冉启舸
Original assignee: Chongqing Dajiang Power Equipment Manufacturing Co ltd
Current assignee: Chongqing Dajiang Power Equipment Manufacturing Co ltd; Chongqing Dajiang Power Equipment Co Ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-01-01
Anticipated expiration: 2030-05-26

Abstract

A transmission mechanism for a garden tool comprises a transmission part, a motor and a connecting body fixed between the transmission part and the motor; the transmission part comprises a shell and a transmission assembly arranged in the shell, and the transmission assembly comprises a shaft body, a driven gear, a bearing and a driving gear meshed with the driven gear; the shaft body penetrates through the driven gear and the bearing and is in integral transmission with the driven gear, and the bearing is fixed on the inner wall of the shell; the output shaft of the motor penetrates through the driving gear and is integrally transmitted with the driving gear. The utility model discloses have following advantage: the temperature of the transmission mechanism can be reduced by about 30 ℃ in the operation process, so that the aging of the transmission mechanism is delayed, and the condition that people are scalded due to overhigh temperature of the transmission mechanism is avoided.

Description

Transmission mechanism for garden tool

Technical Field

The utility model relates to a garden machine field, concretely relates to a drive mechanism for garden instrument.

Background

Common garden tools include pole shears, pole saws, brush cutters, lawn mowers, and the like. Wherein, the high branch scissors are mainly used for cutting off the high branches of the small trees; the high branch saw is mainly used for operations such as forest felling, timber manufacturing, railway sleeper sawing and the like; the brush cutter is mainly used for removing weeds in forests, cutting short shrubs, trimming lawn edges and the like.

Generally, a high branch shear, a high branch saw, a brush cutter and a grass trimmer comprise a handle, a connecting rod, a transmission mechanism and an operation head connected with the transmission mechanism through a driving shaft, wherein the handle is arranged on the connecting rod. The handle is arranged on the connecting rod, so that an operator can conveniently hold the high branch scissors, the high branch saw or the brush cutter; the connecting rod is used for installing a driving shaft and a cable, adapting to the working height and the like; the transmission mechanism is used for driving the operation head to work; the working head is a part for trimming work such as a scissor blade, a saw head, or a cutting blade connected to the transmission mechanism.

In the prior art, there is a transmission mechanism for a garden tool, which includes a transmission part, a motor, and a connecting body fixed between the transmission part and the motor; the transmission part comprises a shell and a transmission assembly arranged in the shell, and the transmission assembly comprises a shaft body, a driven gear, a bearing, a supporting bearing and a driving gear which is meshed with the driven gear and provided with a bulge; the number of the bearings is two, the two bearings are fixed on the inner wall of the shell and are respectively arranged on two sides of the driven gear, and the shaft body penetrates through the driven gear and the two bearings; the bulge is arranged in the support bearing, the support bearing is fixed on the inner wall of the shell, and the output shaft of the motor penetrates through the connecting body, the shell and the bulge to be arranged in the driving gear and integrally transmitted with the bulge and the driving gear; the shell is provided with three connecting columns, the connecting body comprises a fastener, a connecting plate and a connecting plate, the edge of the connecting plate is uniformly provided with three lugs in the circumferential direction, the fastener is three bolts, and the bolts penetrate through the lugs and the connecting plate and are fixed in the connecting columns; two ends of the connector are respectively connected with the output shaft of the motor through a bearing I.

The above-mentioned transmission mechanism for garden tools has the following disadvantages:

1. the support mode of the driving gear is to set the projection in the support bearing, the support bearing is fixed on the inner wall of the shell, the motor output shaft passes through the connector, the shell and the projection are set in the driving gear and integrally transmit with the projection and the driving gear, therefore, when the motor output shaft drives the driving gear and the projection to rotate at high speed, the bearing and the support bearing can both rotate at high speed, the bearing and the support bearing rotate at high speed or cause the bearing and the support bearing to generate heat, the bearing and the support bearing shell generate heat and easily transmit the heat to the shell, thereby easily causing the phenomena that the transmission mechanism is aged due to overhigh temperature and scalds people due to overhigh temperature;

2. the connector comprises three fasteners, a connecting column, a connecting plate and a connecting plate, wherein three lugs are uniformly arranged on the periphery of the connecting plate, the three fasteners and the three connecting columns respectively correspond to the lugs, the fasteners penetrate through the lugs and the connecting plate and are fixed in the connecting column, and the connector is high in processing cost and large in size;

3. the transmission ratio between the driving gear and the driven gear in the transmission mechanism is 11: 28, the drive gear and the driven gear are bulky, resulting in a bulky transmission.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drive mechanism for garden instrument, it can reduce 30 ℃ of temperature about at the operation in-process to delay drive mechanism ageing and avoid appearing scalding people's phenomenon because of drive mechanism high temperature.

The utility model aims to realize the transmission mechanism for the garden tool, which comprises a transmission part, a motor and a connecting body fixed between the transmission part and the motor; the transmission part comprises a shell and a transmission assembly arranged in the shell, and the transmission assembly comprises a shaft body, a driven gear, a bearing and a driving gear meshed with the driven gear; the shaft body penetrates through the driven gear and the bearing and is in integral transmission with the driven gear, and the bearing is fixed on the inner wall of the shell; the output shaft of the motor penetrates through the driving gear and is integrally transmitted with the driving gear.

The utility model discloses in, the theory of use lies in: the shaft body and the driven gear as well as the motor output shaft and the driving gear are integrally driven in an interference fit, spline connection, welding fixation, integrated arrangement and other modes. When the output shaft of the motor rotates, the driving gear is driven to rotate, the driving gear rotates to drive the driven gear to rotate, and the driven gear rotates to drive the shaft body to rotate; the final drive shaft of being connected with the operation head of axis body passes through the axle sleeve and connects and can drive the operation head. Fix the bearing at shells inner wall and can support driven gear and axis body, because the motor output shaft runs through the driving gear, consequently, the motor output shaft can play the effect of support to the driving gear, the driving gear no longer need support through the support bearing of being connected with the casing, thereby avoided rotating the heat that produces by support bearing, reduce 30 ℃ of temperature about in the operation process, finally reach and delay drive mechanism ageing and avoid appearing scalding the phenomenon of hindering the people because of drive mechanism high temperature.

Due to the adoption of the technical scheme, the utility model discloses following advantage has: the temperature of about 30 ℃ can be reduced in the operation process, so that the aging of a transmission mechanism is delayed, and the phenomenon that people are scalded due to high temperature is avoided; in addition, the processing cost of the connecting body is reduced, the volume is reduced, the structural strength is increased, and the volume of the transmission part is reduced.

Drawings

The drawings of the utility model are as follows:

fig. 1 is a schematic sectional view of a transmission mechanism for a garden tool according to the present invention.

Fig. 2 is a perspective view of a transmission mechanism for a garden tool according to the present invention.

Fig. 3 is a schematic sectional view of the transmission mechanism for garden tool after installation.

Fig. 4 is an internal perspective view of the transmission mechanism for garden tool after installation.

In the figure: 1. a transmission section; 2. a linker; 3. a motor; 4. a fastener; 5. a connecting disc; 6. a shaft body; 7. a driven gear; 8. a bearing; 9. a bearing I; 10. a shaft sleeve; 11. a drive shaft; 12. a connecting rod; 13. a handle; 14. an output shaft of the motor; 15. a driving gear; 16. a housing.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in fig. 1 to 4, a transmission mechanism for a garden tool includes a transmission part 1, a motor 3, and a connecting body 2 fixed between the transmission part 1 and the motor 3; the transmission part 1 comprises a shell 16 and a transmission assembly arranged in the shell 16, wherein the transmission assembly comprises a shaft body 6, a driven gear 7, a bearing 8 and a driving gear 15 meshed with the driven gear 7; the shaft body 6 penetrates through the driven gear 7 and the bearing 8 and is integrally transmitted with the driven gear 7, and the bearing 8 is fixed on the inner wall of the shell 16; the motor output shaft 14 penetrates the driving gear 15 and integrally transmits with the driving gear 15.

The utility model discloses in, the theory of use lies in: the shaft body 6 and the driven gear 7 as well as the motor output shaft 14 and the driving gear 15 are integrally driven in an interference fit, spline connection, welding fixation, integrated arrangement and other modes. When the motor output shaft 14 rotates, the driving gear 15 is driven to rotate, the driving gear 15 rotates to drive the driven gear 7 to rotate, and the driven gear 7 rotates to drive the shaft body 6 to rotate; the final drive shaft that is connected with the operation head of axis body 6 passes through axle sleeve 10 and connects and can drive the operation head. Fix bearing 8 at 16 inner walls of casing can support driven gear 7 and axis body 6, because motor output shaft 14 runs through driving gear 15, consequently, motor output shaft 14 can play the effect of support to driving gear 15, driving gear 15 no longer need support through the support bearing 8 of being connected with casing 16, thereby avoided the heat that produces by support bearing 8 rotation, reduce 30 ℃ of temperature about in the operation process, finally reach and delay drive mechanism ageing and avoid appearing scalding the phenomenon of hindering the people because of drive mechanism high temperature.

Further, the connecting body 2 comprises a fastening member 4 and a connecting disc 5 sleeved on the output shaft 14 of the motor, and the fastening member 4 is fixed in the connecting disc 5 through the shell 16. The connector 2 has the advantages of low processing cost, small volume and high structural strength. The fasteners 4 are bolts, screws, lead screw nut assemblies, and the like.

Furthermore, two ends of the connecting disc 5 are respectively connected with the motor output shaft 14 through bearings I9. The advantage that the both ends of flange are connected with motor output shaft 14 through bearing I9 respectively is to support and protect motor output shaft 14 when avoiding connector 2 to influence motor output shaft 14 and rotate.

Further, the transmission ratio between the driven gear 7 and the driving gear 15 is 11: 21. the driven gear 7 and the driving gear 15 of the transmission ratio can reduce the volume under the condition of ensuring the normal operation of the operation head, thereby reducing the volume of the transmission part 1 and further reducing the whole volume of the transmission mechanism for the garden tool.

Further, the shaft body 6 passes through the driven gear, and the shaft bodies 6 on both sides of the driven gear are fixed on the housing 16 through the bearings 8. The shaft bodies 6 on both sides of the driven gear are fixed on the housing 16 through the bearings 8, so that the supporting shaft bodies 6 and the driven gear are further supported, and the structural strength of the transmission part 1 is further improved.

Further, a shaft sleeve 10 is disposed in the housing 16, and the shaft body 6 and the driving shaft 11 are connected through the shaft sleeve 10. The purpose of connecting the shaft body 6 and the driving shaft 11 through the shaft sleeve 10 is to facilitate the mounting and dismounting of the driving shaft.

Claims

1. A transmission mechanism for a garden tool comprises a transmission part (1), a motor (3) and a connecting body (2) fixed between the transmission part (1) and the motor (3); the transmission part (1) comprises a shell (16) and a transmission assembly arranged in the shell (16), and is characterized in that: the transmission assembly comprises a shaft body (6), a driven gear (7), a bearing (8) and a driving gear (15) meshed with the driven gear (7); the shaft body (6) penetrates through the driven gear (7) and the bearing (8) and is in integral transmission with the driven gear (7), and the bearing (8) is fixed on the inner wall of the shell (16); the motor output shaft (14) penetrates through the driving gear (15) and is in integral transmission with the driving gear (15).

2. The transmission mechanism for a garden tool, as claimed in claim 1, wherein: the connecting body (2) comprises a fastening piece (4) and a connecting disc (5) sleeved on the motor output shaft (14), and the fastening piece (4) penetrates through the shell (16) and is fixed in the connecting disc (5).

3. The transmission mechanism for a garden tool, as claimed in claim 2, wherein: two ends of the connecting disc (5) are respectively connected with a motor output shaft (14) through a bearing I (9).

4. The transmission mechanism for a garden tool, as claimed in claim 1, 2 or 3, wherein: the transmission ratio between the driven gear (7) and the driving gear (15) is 11: 21.

5. the transmission mechanism for a garden tool, as claimed in claim 1, 2 or 3, wherein: the shaft body (6) penetrates through the driven gear, and the shaft bodies (6) on two sides of the driven gear are fixed on the shell (16) through bearings (8).

6. The transmission mechanism for a garden tool, as claimed in claim 4, wherein: the shaft body (6) penetrates through the driven gear, and the shaft bodies (6) on two sides of the driven gear are fixed on the shell (16) through bearings (8).

7. The transmission mechanism for a garden tool, as claimed in claim 1, 2, 3, or 6, wherein: a shaft sleeve (10) is further arranged in the shell (16), and the shaft body (6) is connected with the driving shaft through the shaft sleeve (10).

8. The transmission mechanism for a garden tool, as claimed in claim 4, wherein: a shaft sleeve (10) is further arranged in the shell (16), and the shaft body (6) is connected with the driving shaft through the shaft sleeve (10).

9. The transmission mechanism for a garden tool, as claimed in claim 5, wherein: a shaft sleeve (10) is further arranged in the shell (16), and the shaft body (6) is connected with the driving shaft through the shaft sleeve (10).