CN211353199U

CN211353199U - Pruning machine

Info

Publication number: CN211353199U
Application number: CN201921678078.3U
Authority: CN
Inventors: 李夏子
Original assignee: Globe Jiangsu Co Ltd
Current assignee: Globe Jiangsu Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-08-28
Anticipated expiration: 2029-10-09

Abstract

The utility model provides a pruner, include handle components, install the power unit of handle components one end and with the sword strip subassembly that power unit links to each other, power unit includes casing assembly, accepts motor and shade in casing assembly and is in the housing in the motor outside, the air intake has been seted up at casing assembly's top, the top of housing is sealed, the bottom is equipped with the through-hole to outside air passes through the air intake gets into inside casing assembly, and pass through the through-hole get into by the housing encloses the motor room of establishing the formation. Compared with the prior art, the utility model discloses a pruner not only has better radiating effect, has waterproof, dustproof effect moreover, can not influence the complete machine performance in overcast and rainy day and moist area work.

Description

Pruning machine

Technical Field

The utility model relates to a garden instrument especially relates to a pruner.

Background

An electric pruning machine is a device used for pruning outdoor plants such as various bushes, hedges, green plants and the like. When the electric pruner is used, a large amount of heat is easy to generate, the electric pruner is not suitable for long-time continuous work, and a special ventilation structure needs to be designed for radiating and cooling a motor, a gear box and a PCB (printed circuit board) of the pruner. However, in some cases, in order to drive workers, the electric pruner may be used in rainy days and wet areas, when the pruner is in rainy days or when the electric pruner is used in wet areas, rainwater easily enters the inside of the pruner through the ventilation structure, so that parts such as a PCB board and a motor are short-circuited or burned, and the like, which may affect working hours and increase costs, so that the electric pruner cannot be used in rainy days or rainy days. In addition, can produce saw-dust and dust when the pruner uses, if the ventilation structure design is not good, saw-dust and dust will get into inside the pruner through the ventilation structure, and then influence the work of motor.

In view of the above, there is a need for an improvement of the existing ventilation structure to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pruner, this pruner not only have better radiating effect, have waterproof, dustproof effect moreover, can not influence the complete machine performance in overcast and rainy day and moist area work.

In order to realize the above object, the utility model provides a pruner, include handle components, install the power unit of handle components one end and with the sword strip subassembly that power unit links to each other, power unit includes casing assembly, accepts motor and shade in casing assembly and is in the housing in the motor outside, the air intake has been seted up at casing assembly's top, the top of housing is sealed, the bottom is equipped with the through-hole, so that the outside air passes through the air intake gets into inside the casing assembly, and pass through the through-hole get into by the housing encloses the motor room of establishing the formation.

As a further improvement of the present invention, the through hole is opened on one side of the housing away from the air inlet; the motor is an outer rotor motor.

As a further improvement, power unit is still including installing the power transmission subassembly of casing subassembly below, the power transmission subassembly is including installing the bottom of casing subassembly bottom is with acceping fan in the bottom, the coaxial cover of fan is established on the output shaft of motor, with the motor drives when the fan rotates, discharge steam in the motor chamber, drive outside air follow the air intake gets into inside the casing subassembly, and certainly the through-hole gets into the motor chamber.

As a further improvement of the utility model, the bottom is formed with the blast chamber of the full cladding of fan and the bottom that is located the blast chamber and with the communicating heat dissipation channel in external world, the ventilation hole has been seted up to casing assembly's bottom, the ventilation hole is used for the intercommunication the motor room with the blast chamber.

As a further improvement, one side of bottom near the sword strip subassembly is extended and is formed with two at least heat dissipation fins, and is formed with heat dissipation channel between two adjacent heat dissipation fins, the blast chamber is enclosed by two heat dissipation fins and is established the formation, heat dissipation channel's one end with the blast chamber communicates with each other, the other end communicates with each other with the external world.

As a further improvement of the present invention, the power transmission assembly further includes a first gear and a second gear installed in the bottom cover and engaged with each other, the first gear is coaxially sleeved on the output shaft of the motor, and the diameter of the first gear is smaller than that of the second gear.

As a further improvement of the present invention, the housing assembly includes a cover over the top cover of the motor, the air intake is provided at the top of the top cover, and the air intake faces the handle assembly one side.

As a further improvement of the present invention, the housing is accommodated in the top cover, and an extension wall located between the air inlet and the housing is further formed inside the top cover, and the extension wall extends downward from an inner side wall of the top cover; preferably, the extension wall extends from top to bottom to a middle position of the housing without contacting the housing.

As a further improvement, the extension wall and be formed with airflow channel between the housing, be provided with in the airflow channel and filter the piece to outside air warp the air intake gets into during airflow channel, filter dust and steam.

As a further improvement, the housing assembly further comprises a support located below the top cover, a drain opening has been seted up to the bottom of the support in the output shaft extending direction of the motor, the drain opening with the air intake communicates with each other.

The utility model has the advantages that: the utility model discloses a pruner is through seting up the air intake at casing assembly's top, and the through-hole is seted up with the top closure of housing, bottom simultaneously to the outside air accessible the air intake gets into inside casing assembly, and passes through the through-hole gets into in the motor chamber, makes the utility model discloses a pruner not only has better radiating effect, has waterproof, dustproof effect moreover, can not influence the complete machine performance in overcast and rainy day and moist area work.

Drawings

Fig. 1 is a three-dimensional structure view of the pruning machine of the utility model.

Fig. 2 is an exploded view of the pruner shown in fig. 1.

Fig. 3 is an exploded view of the handle assembly of fig. 2.

Fig. 4 is an exploded view of the blade assembly of fig. 2.

Fig. 5 is a perspective view of the power mechanism of fig. 2.

Figure 6 is a partially exploded view of the power mechanism of figure 5.

Fig. 7 is an exploded view of the housing assembly of fig. 6.

Fig. 8 is another exploded angular view of the housing assembly of fig. 7.

Figure 9 is a cross-sectional view of the power mechanism of figure 5.

Fig. 10 is an exploded view of the power transmission assembly of fig. 6.

Fig. 11 is an exploded view of the bottom cap of fig. 10.

Fig. 12 is an exploded view of the power transmission assembly of fig. 10 in cooperation with a blade bar assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, the present invention discloses a pruner 100, which comprises a handle assembly 10, a power mechanism 20 mounted at one end of the handle assembly 10, and a blade assembly 30 connected to the power mechanism 20.

Referring to fig. 2 and 3, the handle assembly 10 includes a main handle 11, an auxiliary handle 12 and a protection plate 13, the main handle 11 is a grippable handle structure having a cavity, and a main knife switch, a speed adjusting switch and the like are all disposed on the main handle 11 for a user to operate. The main handle 11 and the auxiliary handle 12 are respectively arranged at two ends of the power mechanism 20, and the auxiliary handle 12 is arranged close to the blade assembly 30, so that a user can conveniently hold and safely start protection. The protection plate 13 is integrally arranged with the auxiliary handle 12 to play a role of protection.

Referring to fig. 2 and 4, the blade assembly 30 includes a pair of cutting blades 31 and a protective decorative plate 32, the pair of cutting blades 31 is detachably disposed in a sliding manner with the power mechanism 20, so that the cutting operation is performed by the power mechanism 20; the protective decorative plate 32 is fixedly disposed at a middle position of the cutting blades 31 and above the pair of cutting blades 31.

Since the handle assembly 10 and the blade assembly 30 are both conventional structures, they will not be described in detail, and the power mechanism 20 will be described in detail in the following description.

Referring to fig. 5 to 12 in combination with fig. 2, the power mechanism 20 includes a housing assembly 21, a motor 22 accommodated in the housing assembly 21, a cover 24 covering the motor 22, and a power transmission assembly 23 installed below the housing assembly 21. A motor chamber 240 for accommodating the motor 22 is formed in the inner periphery of the housing 24, and in this embodiment, the motor 22 is preferably an outer rotor motor.

The housing assembly 21 includes a top cover 211 covering the motor 22 and a bracket 212 positioned below the top cover 211. The top cover 211 is provided with an air inlet 2110 at the top thereof, the air inlet 2110 is formed at the top of the rear wall of the top cover 211, and the air inlet 2110 is opened toward one side of the handle assembly 10, so that external air can enter the inside of the top cover 211 through the air inlet 2110. Of course, the air inlet 2110 may also be disposed at the top of the other side wall of the top cover 211, or both the top of the side wall and the top of the rear wall of the top cover 211 are disposed with the air inlet 2110.

The cover shell 24 is accommodated in the top cover 211 and located beside the air inlet 2110, an extension wall 25 located between the air inlet 2110 and the cover shell 24 is further formed inside the top cover 211, and the extension wall 25 extends vertically and downwardly from the inner side wall of the top cover 211; preferably, the extension wall 25 extends to a middle position of the cover 24 from top to bottom in the embodiment and is not in contact with the cover 24; that is, the extension wall 25 extends vertically downward from the inner side wall of the top cover 211 to a half of the height of the housing 24. The arrangement is such that the extending wall 25 and the cover 24 form an airflow channel 251 therebetween, so that after the external air enters through the air inlet 2110, the external air flows along the airflow channel 251 into the space formed by the cover 24 and the top cover 211. Of course, the extending height of the extending wall 25 is not limited thereto as long as it is ensured that the extending wall 25 does not contact the housing 24 so as to form the gas flow passage 251 between the extending wall 25 and the housing 24.

The bottom of the bracket 212 is provided with a drain opening 2121, and in the extending direction of the output shaft 221 of the motor 22, the drain opening 2121 and the air inlet 2110 are corresponding to each other in the up-down direction and are communicated with each other. With the arrangement, after the external air enters through the air inlet 2110, due to the blocking of the extension wall 25, the sawdust and dust with larger particle size can be discharged from the discharge opening 2121, so that a better dustproof effect is achieved; when the waterproof device is used in rainy days or wet areas, liquid such as rainwater and the like enters from the air inlet 2110 along with outside air, and is discharged from the discharge port 2121 due to the blocking of the extension wall 25 and the action of gravity of the extension wall, so that a good waterproof effect is achieved.

A filter (not shown) is disposed in the air flow channel 251, and is used for filtering out dust and moisture with small particle size when the external air enters the air flow channel 251 through the air inlet 2110, so that clean and dry external air continues to flow into the inside of the top cover 211 along the air flow channel 251.

The top of the housing 24 is closed, the bottom of the housing 24 is provided with a plurality of through holes 241, and the through holes 241 are provided, so that after external air enters the inside of the top cover 211, the external air flows between the housing 24 and the top cover 211, and then enters the motor chamber 240 through the through holes 241, so as to cool the motor 22 accommodated in the motor chamber 240. In this embodiment, the casing 24 is an aluminum alloy casing, and the through hole 241 is formed on a side of the casing 24 away from the air inlet 2110; the bracket 212 is a magnesium alloy bracket, and the motor 22 is preferably an external rotor motor.

The bracket 212 includes a first portion 2121 for mounting the motor 22 and a second portion 2122 for mounting the circuit board 27, the first portion 2121 is substantially disc-shaped, and an insertion hole 2123 is formed at a middle position of the first portion 2121 for inserting the output shaft 221 of the motor 22 therethrough. The bottom of the motor 22 and the bottom of the cover 24 are both limited and contained in the first portion 2121, and the bottom of the top cover 211 and the first portion 2121 are assembled and fixed by a screw 50, but not limited thereto.

A vent hole 2124 is further opened at the bottom of the first portion 2121 to communicate the motor chamber 240 with the power transmission assembly 23. The second portion 2122 is disposed adjacent one side of the handle assembly 10 and is coupled to the handle assembly 10 to receive the circuit board 27. The circuit board 27 is accommodated in the second portion 2122 and is shielded under the top cover 211, so that core components of the circuit board can be protected by the top cover 211 and the bracket 212, and the circuit board has waterproof and dustproof effects.

The power transmission assembly 23 is mounted below the bracket 212, and includes a bottom cover 231 mounted at the bottom of the bracket 212, a fan 230 housed in the bottom cover 231, and a first gear 232 and a second gear 233 mounted on the bottom cover 231 and engaged with each other, at least two heat dissipation fins 234 are formed on one side of the bottom cover 231 adjacent to the blade bar assembly 30 in an extending manner, and a heat dissipation channel 235 is formed between two adjacent heat dissipation fins 234.

The fan 230 is accommodated in the bottom cover 231 and coaxially sleeved on the output shaft 221 of the motor 22, so that when the output shaft 221 drives the fan 230 to rotate, hot air in the motor chamber 240 can be exhausted by using the suction force of the fan 230, and outside air is driven to enter the top cover 211 from the air inlet 2110 and enter the motor chamber 240 from the through hole 241 on the housing 24.

A blowing chamber 236 for fully covering the fan 230 and a heat dissipation channel 237 positioned at the bottom of the blowing chamber 236 and communicating with the outside are formed at a side of the bottom cover 231 away from the blade assembly 30. The blast chamber 236 may be enclosed by two heat dissipating fins 234 located at the outermost side, and the heat dissipating channel 235 has one end communicating with the blast chamber 236 and the other end communicating with the outside.

The fan 230 is a centrifugal fan, and the vent holes 2124 at the bottom of the bracket 212 are used for communicating the motor chamber 240 with the blower chamber 236, so that when the fan 230 rotates, heat in the motor chamber 240 can be absorbed into the blower chamber 236 through the vent holes 2124, and then dissipated through the heat dissipation channel 237 and the heat dissipation channel 235.

The heat dissipation channel 237 is opened at one end of the bottom cover 231 away from the blade assembly 30, and in the width direction of the bottom cover 231, the heat dissipation channel 237 extends in an arc shape; the bottom of the blast chamber 236 is further opened with a vent 238 communicating with the outside, and the vent 238 also extends in an arc shape in the length direction of the bottom cover 231. When the output shaft 221 of the motor 22 rotates, the fan 230 can be driven to rotate, and when the fan 230 rotates, a low-pressure area is generated near the fan, and at this time, the vent 238 can supplement external cold air to the fan, and discharge internal hot air through the heat dissipation channel 237, thereby improving the heat dissipation effect.

The utility model discloses in, design heat dissipation channel 237 and vent 238 and connect blast chamber 236 and external world in the thickness direction of bottom 231, aim at: so that the heat dissipation effect is better.

The bottom cover 231 includes a first bottom cover 2311 and a second bottom cover 2312 which are assembled and matched up and down, and an accommodating cavity 2313 formed between the first bottom cover 2311 and the second bottom cover 2312, and the first gear 232 and the second gear 233 are accommodated in the accommodating cavity 2313. The first gear 232 is coaxially sleeved on the output shaft 221 of the motor 22, and the diameter of the first gear 232 is smaller than that of the second gear 233, so that when the motor 22 rotates, the output shaft 221 can drive the first gear 232 to rotate, and then the second gear 233 is driven to rotate.

Eccentric wheel parts 2331 are respectively arranged at two opposite ends of the second gear 233, and the central axes of the two eccentric wheel parts 2331 do not overlap in the direction of the central axis of the second gear 233. The power transmission assembly 23 further includes two crank rods 239 respectively sleeved on the two eccentric wheel portions 2331, one end of each crank rod 239 is sleeved on the corresponding eccentric wheel portion 2331, and the other end is connected to the blade assembly 30, so that when the second gear 233 rotates, the crank rods 239 can be driven to move, and then the blade assembly 30 is driven to move back and forth to perform shearing operation. Preferably, the two crank rods 239 have one end connected to the eccentric wheel 2331 and the other end connected to the blade bar assembly 30, which are not overlapped at the center, so as to achieve stable power transmission.

In the present invention, the first bottom cover 2311 and the second bottom cover 2312 are assembled by the mutual engagement of the screws and the screw holes; of course, in other embodiments, the first bottom cover 2311 and the second bottom cover 2312 may be assembled and fixed by other methods, which is not limited herein. In addition, it is understood that the rotational connection between the first gear 232 and the fan 230 and between the eccentric wheel portion 2331 of the second gear 233 and the crank lever 239 are implemented by the bearings 40, which is prior art and thus will not be described in detail.

The blowing chamber 236, the heat dissipating fins 234, and the heat dissipating passage 235 are formed at a side of the first bottom cover 2311 facing the housing assembly 21. Specifically, the heat dissipating fins 234 are formed on the first bottom cover 2311 and are located on one side of the fan 230, one end of the heat dissipating channel 235 is communicated with the blast chamber 236, and the other end of the heat dissipating channel is communicated with the outside, when the motor 22 rotates, the fan 230 rotates synchronously, and drives the air in the accommodating cavity 2313 to be discharged outwards along the heat dissipating channel 235, and the heat on the motor 22, the power transmission assembly 23 and the heat dissipating fins 234 can be taken away in the process, so that the heat dissipating efficiency of the pruner 100 is improved.

The utility model discloses pruner 100's heat dissipation, dustproof process can summarize to: the fan 230 generates a suction force when rotating, and under the suction force of the fan 230, the heat in the motor chamber 240 flows into the blower chamber 236 through the vent holes 2124 at the bottom of the bracket 212, and is dissipated through the heat dissipating channel 237 and the heat dissipating channel 235; meanwhile, the external air enters from the air inlet 2110, and due to the blocking of the extension wall 25, wood chips, dust, rain water, etc. with larger particle size are discharged from the discharge opening 2121, while dust and water vapor with smaller particle size are filtered by the filter, so that clean and dry external air continues to flow into the top cover 211 along the air flow channel 251; the outside air entering the inside of the top cover 211 flows around the housing 24 until entering the motor chamber 240 through the through hole 241, and takes away the heat in the motor chamber 240. Compared with the prior art, the utility model discloses a pruner 100 not only has better radiating effect, can also play waterproof, dirt-proof effect.

To sum up, the utility model discloses a pruner 100 is through seting up air intake 2110 at housing unit 21's top, seals the top of housing 24 simultaneously, sets up through-hole 241 in the bottom to the outside air accessible air intake 2110 gets into inside housing unit 21, and passes through in through-hole 241 gets into motor chamber 240, not only has better radiating effect, has waterproof, dustproof effect moreover, can not influence the complete machine performance in overcast and rainy day and humid area work.

The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a pruner, includes the handle components, install the power unit of handle components one end and with the sword strip subassembly that power unit links to each other, its characterized in that: the power mechanism comprises a shell assembly, a motor accommodated in the shell assembly and a cover covering the outer side of the motor, wherein the top of the shell assembly is provided with an air inlet, the top of the cover is closed, and the bottom of the cover is provided with a through hole, so that external air can enter the shell assembly through the air inlet and enter a motor chamber formed by the cover in an enclosing manner through the through hole.

2. The pruner of claim 1, wherein: the through hole is formed in one side, far away from the air inlet, of the housing; the motor is an outer rotor motor.

3. The pruner of claim 1, wherein: the power mechanism further comprises a power transmission assembly arranged below the shell assembly, the power transmission assembly comprises a bottom cover arranged at the bottom of the shell assembly and a fan accommodated in the bottom cover, the fan is coaxially sleeved on an output shaft of the motor, so that when the motor drives the fan to rotate, hot air in the motor chamber is discharged, and external air is driven to enter the shell assembly from the air inlet and enter the motor chamber from the through hole.

4. The pruner of claim 3, wherein: the bottom cover is provided with a blast chamber which fully covers the fan and a heat dissipation channel which is positioned at the bottom of the blast chamber and communicated with the outside, and the bottom of the shell assembly is provided with a vent hole which is used for communicating the motor chamber and the blast chamber.

5. The pruner of claim 4, wherein: one side of the bottom cover close to the cutter bar assembly extends to form at least two radiating fins, a radiating channel is formed between every two adjacent radiating fins, the blast chamber is formed by surrounding the two radiating fins, one end of the radiating channel is communicated with the blast chamber, and the other end of the radiating channel is communicated with the outside.

6. The pruner of claim 3, wherein: the power transmission assembly further comprises a first gear and a second gear which are arranged on the bottom cover and are meshed with each other, the first gear is coaxially sleeved on the output shaft of the motor, and the diameter of the first gear is smaller than that of the second gear.

7. The pruner of claim 1, wherein: the shell assembly comprises a top cover covering the motor, the air inlet is formed in the top of the top cover, and faces towards one side of the handle assembly.

8. The pruner of claim 7, wherein: the housing is accommodated in the top cover, an extension wall located between the air inlet and the housing is further formed inside the top cover, and the extension wall extends downwards from the inner side wall of the top cover.

9. The pruner of claim 8, wherein: an air flow channel is formed between the extension wall and the housing, and a filtering piece is arranged in the air flow channel so as to filter dust and water vapor when outside air enters the air flow channel through the air inlet.

10. The pruner of claim 7, wherein: the shell assembly further comprises a support located below the top cover, a drain hole is formed in the bottom of the support, and the drain hole is communicated with the air inlet in the extending direction of the output shaft of the motor.