Pruning Machine

Abstract

The present invention provides a pruning machine, including a handle assembly, a power mechanism installed at one end of the handle assembly, and a blade assembly connected to the power mechanism, wherein the power mechanism includes a housing assembly, a motor contained in the housing assembly, and a cover shell covering the outside of the motor, an air inlet is provided at the top of the housing assembly, the top of the cover shell is closed, and a through hole is provided at the bottom, so that external air can enter the interior of the housing assembly through the air inlet, and enter the motor room formed by the cover shell through the through hole. Compared with the prior art, the pruning machine of the present invention not only has a better heat dissipation effect, but also has a waterproof and dustproof effect, and can work on rainy days and in humid areas without affecting the performance of the whole machine.

Description

Technical Field

[0001] The invention relates to garden tools, in particular to a pruning machine. Background Art

[0002] An electric pruning machine is a device used to prune various outdoor plants such as bushes, hedges, and green plants. During use, electric pruning machines tend to generate a lot of heat and are not suitable for long-term continuous work. For this reason, a special ventilation structure needs to be designed to dissipate heat and cool the motor, gearbox, and PCB board of the pruning machine. However, sometimes in order to rush the work, workers may use electric pruning machines on rainy days and in humid areas. When the pruning machine is working in rainy weather or when the electric pruning machine is used in a humid area, rainwater can easily enter the machine through the ventilation structure and cause short circuits or burnouts of components such as PCB boards and motors. This may affect working hours and increase costs, making it impossible to use electric pruning machines on cloudy days or in light rain. In addition, when the pruning machine is used, wood chips and dust will be generated. If the ventilation structure is not well designed, wood chips and dust will enter the pruning machine through the ventilation structure, thereby affecting the work of the motor.

[0003] In view of this, it is indeed necessary to improve the existing ventilation structure to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a pruning machine which not only has a good heat dissipation effect, but also has waterproof and dustproof effects, and can work in rainy days and humid areas without affecting the performance of the whole machine.

[0005] To achieve the above-mentioned purpose, the present invention provides a pruning machine, including a handle assembly, a power mechanism installed at one end of the handle assembly, and a blade assembly connected to the power mechanism, the power mechanism including a shell assembly, a motor accommodated in the shell assembly, and a cover shell covering the outside of the motor, an air inlet is opened at the top of the shell assembly, the top of the cover shell is closed and a through hole is provided at the bottom, so that external air can enter the interior of the shell assembly through the air inlet and enter the motor room formed by the cover shell through the through hole.

[0006] As a further improvement of the present invention, the through hole is opened on a side of the cover shell away from the air inlet; and the motor is an outer rotor motor.

[0007] As a further improvement of the present invention, the power mechanism also includes a power transmission assembly installed below the shell assembly, the power transmission assembly includes a bottom cover installed at the bottom of the shell assembly and a fan accommodated in the bottom cover, the fan is coaxially sleeved on the output shaft of the motor, so that when the motor drives the fan to rotate, the hot air in the motor room is discharged, the external air is driven to enter the shell assembly from the air inlet, and enter the motor room from the through hole.

[0008] As a further improvement of the present invention, the bottom cover is formed with a blower chamber which fully covers the fan and a heat dissipation channel which is located at the bottom of the blower chamber and communicates with the outside world. A ventilation hole is opened at the bottom of the shell assembly, and the ventilation hole is used to connect the motor room and the blower chamber.

[0009] As a further improvement of the present invention, at least two heat dissipation fins are extended from one side of the bottom cover close to the blade assembly, and a heat dissipation channel is formed between two adjacent heat dissipation fins. The blower chamber is formed by the two heat dissipation fins, and one end of the heat dissipation channel is connected to the blower chamber, and the other end is connected to the outside.

[0010] As a further improvement of the present invention, the power transmission assembly also includes a first gear and a second gear installed on the bottom cover and meshing 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 the diameter of the second gear.

[0011] As a further improvement of the present invention, the shell assembly includes a top cover covering the motor, the air inlet is opened at the top of the top cover, and the air inlet faces one side of the handle assembly.

[0012] As a further improvement of the present invention, the cover shell is accommodated in the top cover, and an extension wall is also formed inside the top cover and located between the air inlet and the cover shell, and the extension wall extends downward from the inner wall of the top cover; preferably, the extension wall extends from top to bottom to the middle position of the cover shell and does not contact the cover shell.

[0013] As a further improvement of the present invention, an air flow channel is formed between the extension wall and the cover shell, and a filter is arranged in the air flow channel to filter out dust and water vapor when external air enters the air flow channel through the air inlet.

[0014] As a further improvement of the present invention, the shell assembly also includes a bracket located below the top cover, and a drain port is provided at the bottom of the bracket. In the extension direction of the output shaft of the motor, the drain port is connected to the air inlet.

[0015] The beneficial effect of the present invention is that the pruning machine of the present invention has an air inlet at the top of the shell assembly, and the top of the cover is closed and a through hole is formed at the bottom, so that external air can enter the shell assembly through the air inlet and enter the motor room through the through hole, so that the pruning machine of the present invention not only has a good heat dissipation effect, but also has a waterproof and dustproof effect, and can work on rainy days and in humid areas without affecting the performance of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the pruning machine of the present invention.

[0017] Figure 2 yes Figure 1 Exploded view of the pruning machine shown.

[0018] Figure 3 yes Figure 2 Exploded view of the center handle assembly.

[0019] Figure 4 yes Figure 2 Exploded view of the middle blade assembly.

[0020] Figure 5 yes Figure 2 A three-dimensional diagram of the power mechanism.

[0021] Figure 6 yes Figure 5 Partial exploded view of the power mechanism shown.

[0022] Figure 7 yes Figure 6 Exploded view of the center housing assembly.

[0023] Figure 8 yes Figure 7 Another exploded view of the housing assembly shown.

[0024] Fig. 9 yes Figure 5 A cross-sectional view of the power mechanism shown.

[0025] Fig.10 yes Figure 6 Exploded view of the power transmission components.

[0026] Fig.11 yes Fig.10 Exploded view of the midsole cover.

[0027] Fig.12 yes Fig.10 An exploded view of the power transmission assembly shown mating with the blade assembly. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] See also Figure 1 and Figure 2 As shown, the present invention discloses a pruning machine 100 , which includes a handle assembly 10 , a power mechanism 20 installed at one end of the handle assembly 10 , and a blade assembly 30 connected to the power mechanism 20 .

[0030] See also Figure 2 and Figure 3 As shown, the handle assembly 10 includes a main handle 11, a sub-handle 12 and a protective plate 13. The main handle 11 is a grippable handle structure with a cavity. The main knife switch, speed regulating switch, etc. are all arranged on the main handle 11 for user operation. The main handle 11 and the sub-handle 12 are respectively arranged at both ends of the power mechanism 20, and the sub-handle 12 is arranged close to the blade assembly 30, which is convenient for users to hold and safely start protection. The protective plate 13 is integrally arranged with the sub-handle 12 to play a protective role.

[0031] See also Figure 2 and Figure 4 As shown, the blade assembly 30 includes a pair of shear blades 31 and a protective decorative plate 32. The pair of shear blades 31 are detachably slidably arranged with the power mechanism 20 so as to be driven by the power mechanism 20 to perform shearing operations; the protective decorative plate 32 is fixedly arranged at the middle position of the shear blades 31 and is located above the pair of shear blades 31.

[0032] Since the handle assembly 10 and the blade assembly 30 are both existing structures, they will not be described in detail here. The power mechanism 20 will be described in detail in the following specification.

[0033] See also Figures 5 to 12 Combined with Figure 2 As shown, the power mechanism 20 includes a housing assembly 21, a motor 22 accommodated in the housing assembly 21, a cover 24 covering the outside of 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 cover 24. In this embodiment, the motor 22 is preferably an outer rotor motor.

[0034] The housing assembly 21 includes a top cover 211 covering the motor 22 and a bracket 212 located below the top cover 211. An air inlet 2110 is provided at the top of the top cover 211. The air inlet 2110 is provided at the top of the rear wall of the top cover 211 and is opened toward one side of the handle assembly 10 so that external air can enter the interior of the top cover 211 through the air inlet 2110. Of course, the air inlet 2110 can also be provided at the top of other side walls of the top cover 211, or the top of the side walls and the top of the rear wall of the top cover 211 can both be provided with air inlets 2110. The specific situation can be determined according to actual conditions and is not limited here.

[0035] The housing 24 is received in the top cover 211 and is located beside the air inlet 2110. An extension wall 25 is formed inside the top cover 211 and is located between the air inlet 2110 and the housing 24. The extension wall 25 extends vertically downward from the inner side wall of the top cover 211. Preferably, in this embodiment, the extension wall 25 extends from top to bottom to the middle position of the housing 24 and does not contact the housing 24. In other words, the extension wall 25 extends vertically downward from the inner side wall of the top cover 211 to half the height of the housing 24. In this way, an airflow channel 251 is formed between the extension wall 25 and the housing 24, so that after the external air enters through the air inlet 2110, it will flow into the space formed by the housing 24 and the top cover 211 along the airflow channel 251. Of course, the extension height of the extension wall 25 is not limited thereto, as long as it can be ensured that the extension wall 25 does not contact the cover shell 24 so as to form an air flow channel 251 between the extension wall 25 and the cover shell 24 .

[0036] The bottom of the bracket 212 is provided with a discharge port 2121, and in the extension direction of the output shaft 221 of the motor 22, the discharge port 2121 corresponds to and communicates with the air inlet 2110. With such a configuration, when external air enters through the air inlet 2110, wood chips and dust with larger particle sizes will be discharged from the discharge port 2121 due to the blocking of the extension wall 25, thereby achieving a better dustproof effect; and when used in rainy weather or humid areas, after liquids such as rainwater enter from the air inlet 2110 along with external air, they will also be discharged from the discharge port 2121 due to the blocking of the extension wall 25 and the gravity of the extension wall 25, thereby achieving a better waterproof effect.

[0037] A filter element (not shown) is provided in the air flow channel 251 for filtering out dust and water vapor with smaller particle sizes when external air enters the air flow channel 251 through the air inlet 2110 , thereby allowing clean and dry external air to continue to flow into the top cover 211 along the air flow channel 251 .

[0038] The top of the cover 24 is closed, and a through hole 241 is provided at the bottom, and a plurality of through holes 241 are provided, so that after the external air enters the interior of the top cover 211, it will first flow between the cover 24 and the top cover 211, and then enter the motor chamber 240 through the through hole 241, so as to cool down the motor 22 accommodated in the motor chamber 240. In this embodiment, the cover 24 is an aluminum alloy cover, and the through hole 241 is provided on a side of the cover 24 away from the air inlet 2110; the bracket 212 is a magnesium alloy bracket, and the motor 22 is preferably an outer rotor motor.

[0039] 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 generally disc-shaped, and a plug hole 2123 is provided in the middle of the first portion 2121 to allow the output shaft 221 of the motor 22 to pass through. The bottom of the motor 22 and the housing 24 are both limitedly accommodated in the first portion 2121, and the bottom of the top cover 211 is assembled and fixed to the first portion 2121 by screws 50, but the present invention is not limited thereto.

[0040] A ventilation hole 2124 is also provided at the bottom of the first part 2121 to connect the motor chamber 240 with the power transmission assembly 23. The second part 2122 is disposed near one side of the handle assembly 10 and is connected to the handle assembly 10 so as to accommodate a circuit board 27. The circuit board 27 is accommodated in the second part 2122 and shielded under the top cover 211, so that its core components can be protected by the top cover 211 and the bracket 212, and has waterproof and dustproof effects.

[0041] The power transmission assembly 23 is installed below the bracket 212, and includes a bottom cover 231 installed at the bottom of the bracket 212, a fan 230 accommodated in the bottom cover 231, and a first gear 232 and a second gear 233 installed on the bottom cover 231 and meshing with each other. At least two heat dissipation fins 234 are extended from one side of the bottom cover 231 close to the blade assembly 30, and a heat dissipation channel 235 is formed between two adjacent heat dissipation fins 234.

[0042] The fan 230 is accommodated in the bottom cover 231 and is coaxially sleeved on the output shaft 221 of the motor 22, so that when the output shaft 221 drives the fan 230 to rotate, the suction force of the fan 230 can be used to discharge the hot air in the motor chamber 240, and drive the external air to enter the top cover 211 from the air inlet 2110, and enter the motor chamber 240 from the through hole 241 on the cover shell 24.

[0043] A blast chamber 236 that fully covers the fan 230 and a heat dissipation channel 237 that is located at the bottom of the blast chamber 236 and communicates with the outside are formed on one side of the bottom cover 231 away from the blade assembly 30. The blast chamber 236 can be formed by being surrounded by two heat dissipation fins 234 located at the outermost side and is arranged in a closed manner, and one end of the heat dissipation channel 235 is communicated with the blast chamber 236 and the other end is communicated with the outside.

[0044] The fan 230 is a centrifugal fan, and the ventilation hole 2124 at the bottom of the bracket 212 is used to connect the motor chamber 240 and the blast chamber 236, so that when the fan 230 rotates, the heat in the motor chamber 240 can be absorbed into the blast chamber 236 through the ventilation hole 2124, and then dissipated through the heat dissipation groove 237 and the heat dissipation channel 235.

[0045] The heat dissipation channel 237 is provided at one end of the bottom cover 231 away from the blade assembly 30, and the heat dissipation channel 237 extends in an arc shape in the width direction of the bottom cover 231; the bottom of the blast chamber 236 is also provided 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, it can drive the fan 230 to rotate, and when the fan 230 rotates, a low-pressure area will be generated near it, at this time, the vent 238 can replenish the external cold air to it, and discharge the internal hot air through the heat dissipation channel 237, thereby improving the heat dissipation effect.

[0046] In the present invention, the heat dissipation channel 237 and the vent 238 are designed to connect the blast chamber 236 and the outside in the thickness direction of the bottom cover 231, with the purpose of achieving a better heat dissipation effect.

[0047] The bottom cover 231 includes a first bottom cover 2311 and a second bottom cover 2312 assembled and matched with each other, and a receiving 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 received in the receiving 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 the diameter of the second gear 233, so that when the motor 22 rotates, the first gear 232 can be driven to rotate by the output shaft 221, and then the second gear 233 can be driven to rotate.

[0048] The two opposite ends of the second gear 233 are respectively provided with eccentric wheel parts 2331, and in the direction of the central axis of the second gear 233, the central axes of the two eccentric wheel parts 2331 do not overlap. The power transmission assembly 23 also includes two crank rods 239 respectively mounted on the two eccentric wheel parts 2331, one end of the two crank rods 239 is mounted on the corresponding eccentric wheel part 2331, and the other end is connected to the blade assembly 30, so that when the second gear 233 rotates, the crank rod 239 can be driven to move, and then the blade assembly 30 can be driven to move forward and backward to perform a shearing operation. Preferably, the ends of the two crank rods 239 connected to the eccentric wheel part 2331 do not overlap in the center, and the other ends connected to the blade assembly 30 overlap in the center, so as to achieve the effect of stable power transmission.

[0049] In the present invention, the assembly between the first bottom cover 2311 and the second bottom cover 2312 is achieved by the mutual cooperation of screws and screw holes; of course, in other embodiments, the first bottom cover 2311 and the second bottom cover 2312 can also be assembled and fixed by other methods, which is not limited here. In addition, it can be understood that the rotation connection between the first gear 232 and the fan 230, and between the eccentric wheel part 2331 of the second gear 233 and the crank rod 239 are all achieved through the bearing 40, which is a prior art and will not be described in detail.

[0050] The blast chamber 236, the heat dissipation fins 234 and the heat dissipation channel 235 are all formed on the side of the first bottom cover 2311 facing the housing assembly 21. Specifically, the heat dissipation 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 dissipation channel 235 is communicated with the blast chamber 236 and the other end 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 outward along the heat dissipation channel 235. This process will take away the heat from the motor 22, the power transmission assembly 23 and the heat dissipation fins 234, thereby improving the heat dissipation efficiency of the pruning machine 100 of the present invention.

[0051] The heat dissipation and dust prevention process of the pruning machine 100 of the present invention can be summarized as follows: when the fan 230 rotates, suction is generated, and under the suction of the fan 230, the heat in the motor chamber 240 flows into the blast chamber 236 through the ventilation hole 2124 at the bottom of the bracket 212, and then dissipates through the heat dissipation slot 237 and the heat dissipation channel 235; at the same time, the external air enters from the air inlet 2110, and due to the obstruction of the extension wall 25, the wood chips, dust and rainwater with larger particle sizes will be discharged from the discharge port 2121, while the dust and water vapor with smaller particle sizes will be filtered out by the filter element, so that the clean and dry external air continues to flow into the top cover 211 along the air flow channel 251; after entering the top cover 211, the external air will flow around the cover 24 until it enters the motor chamber 240 from the through hole 241, taking away the heat in the motor chamber 240. Compared with the prior art, the pruning machine 100 of the present invention not only has a better heat dissipation effect, but also has a waterproof and dustproof effect.

[0052] In summary, the pruning machine 100 of the present invention opens an air inlet 2110 at the top of the shell assembly 21, and at the same time closes the top of the cover 24 and opens a through hole 241 at the bottom, so that external air can enter the shell assembly 21 through the air inlet 2110 and enter the motor room 240 through the through hole 241. It not only has a good heat dissipation effect, but also has waterproof and dustproof effects. It can work on rainy days and humid areas without affecting the performance of the whole machine.

[0053] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A pruning machine, comprising a handle assembly, a power mechanism installed at one end of the handle assembly, and a blade assembly connected to the power mechanism, characterized in that: The power mechanism includes a shell assembly, a motor accommodated in the shell assembly, and a cover shell covering the outside of the motor, an air inlet is provided at the top of the shell assembly, the top of the cover shell is closed, and a through hole is provided at the bottom, so that external air can enter the shell assembly through the air inlet and enter the motor room formed by the cover shell through the through hole; wherein the through hole is provided on a side of the cover shell away from the air inlet; the shell assembly includes a top cover covering the top of the motor, the cover shell is accommodated in the top cover, the air inlet is provided at the top of the top cover, and the air inlet faces the side of the handle assembly.

2. The pruning machine according to claim 1, characterized in that: The motor is an outer rotor motor.

3. The pruning machine according to claim 1, characterized in that: The power mechanism also includes a power transmission component installed below the shell assembly, and the power transmission component includes a bottom cover installed at the bottom of the shell assembly and a fan accommodated in the bottom cover. The fan is coaxially sleeved on the output shaft of the motor so that when the motor drives the fan to rotate, the hot air in the motor room is discharged, the external air is driven to enter the shell assembly from the air inlet, and enter the motor room from the through hole.

4. The pruning machine according to claim 3, characterized in that: The bottom cover is formed with a blast chamber which fully covers the fan and a heat dissipation channel which is located at the bottom of the blast chamber and communicates with the outside. A ventilation hole is opened at the bottom of the shell assembly, and the ventilation hole is used to connect the motor room and the blast chamber.

5. The pruning machine according to claim 4, characterized in that: At least two heat dissipation fins are extended from one side of the bottom cover close to the blade assembly, and a heat dissipation channel is formed between two adjacent heat dissipation fins. The blast chamber is formed by surrounding the two heat dissipation fins, and one end of the heat dissipation channel is connected to the blast chamber and the other end is connected to the outside.

6. The pruning machine according to claim 3, characterized in that: The power transmission assembly also includes a first gear and a second gear mounted on the bottom cover and meshing 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 the diameter of the second gear.

7. The pruning machine according to claim 1, characterized in that: An extension wall is also formed inside the top cover and is located between the air inlet and the cover shell. The extension wall extends downward from the inner side wall of the top cover.

8. The pruning machine according to claim 7, characterized in that: An air flow channel is formed between the extension wall and the cover shell, and a filter is arranged in the air flow channel to filter out dust and water vapor when external air enters the air flow channel through the air inlet.

9. The pruning machine according to claim 1, characterized in that: The housing assembly further comprises a bracket located below the top cover, a drain port is provided at the bottom of the bracket, and the drain port is communicated with the air inlet in the extending direction of the output shaft of the motor.

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