CN108015858B

CN108015858B - Portable reciprocating saw for pruning high branches

Info

Publication number: CN108015858B
Application number: CN201711288175.7A
Authority: CN
Inventors: 杨卫东; 左志远
Original assignee: Keer Xindong Beijing Technology Co ltd
Current assignee: Keer Xindong Beijing Technology Co ltd
Priority date: 2017-12-07
Filing date: 2017-12-07
Publication date: 2020-07-10
Anticipated expiration: 2037-12-07
Also published as: CN108015858A

Abstract

The invention discloses a portable reciprocating saw for high branch cutting, which comprises a rod-shaped body, wherein a working part and a power supply part are respectively arranged at two ends of the body, the working part is connected with a strip-shaped saw blade through a transmission mechanism, and the transmission mechanism is used for driving the saw blade to do axial linear reciprocating motion by utilizing power output by a permanent magnet non-induction motor; the body is internally formed with a cavity, and a lead electrically connected with the power supply part and the permanent magnet non-induction motor is arranged in the cavity. The power of the invention adopts the motor, thus avoiding various problems in the use process of the saw adopting the internal combustion engine as a power source; the body adopts a rod with a cavity, and each part is lighter, so that the whole equipment can be easily operated by women or elderly people; the transmission device changes the output direction of the motor into reciprocating motion similar to that of a manual saw, so that the working range of the saw in the using process is small, the branches beside the saw cannot be influenced during working, and the economic loss is avoided.

Description

Portable reciprocating saw for pruning high branches

Technical Field

The invention relates to the field of agricultural production and garden gardening mechanical equipment, in particular to a light saw which is energy-saving, environment-friendly and convenient to operate, and particularly relates to a light reciprocating saw for lopper cutting.

Background

A saw, which is a tool for cutting or sawing off wood or other objects to be processed, generally comprises a saw blade and a saw body, wherein the saw blade is formed by irregularly arranged saw teeth. There are many kinds of saws, which can be divided into cross saws for cutting off wood materials and vertical saws for sawing off wood materials along wood grains and digging saws, also called wire saws, mainly for cutting curved shapes; according to the size of the saw teeth, the saw teeth can be divided into coarse saw teeth suitable for sawing larger and thicker timbers, middle saw teeth suitable for sawing timbers with common size and thickness and fine saw teeth suitable for finer sawing; the frame saw and the plate saw are divided according to the shapes. The saw is divided into a big saw, a double chain saw, a small saw, a fish belly saw, a circular saw, a handsaw, a hacksaw and a knife saw, and the maximum length is 3-4 meters. Along with the automatic development of machinery, automatic handheld saw has all appeared in present many technical field, and more common for example handheld chain felling saw utilizes power device to drive the saw blade, just can operate alone, and it is efficient to fell.

However, such hand-held saws have a number of disadvantages, firstly to ensure their working efficiency, the power plant is generally a relatively powerful internal combustion engine or electric motor, resulting in their overall size and weight being substantially only suitable for robust male adult operation, and also being particularly noisy in operation; in addition, diesel oil or engine oil is generally needed in the using process, so that the environment is not protected, and the machine and operators are easily polluted; in addition, these hand-held saws are not suitable for some working environments, such as some fruit trees with dense branches or wooden gardens, and the branches beside the traditional hand-held saws are likely to be damaged when being used, so that economic losses such as fruit dropping are caused.

Disclosure of Invention

In order to solve the defects in the prior art, the invention provides the portable high-branch cutting reciprocating saw which is convenient to use, low in cost, low in required force during operation (available for women, old people and the like), low in maintenance cost and free from damaging the periphery of an operation position, and the specific scheme is as follows:

a portable reciprocating saw for high branch cutting comprises a working part, wherein the working part comprises a permanent magnet non-induction motor, an output shaft of the permanent magnet non-induction motor is connected with a strip-shaped saw blade through a transmission mechanism, and the transmission mechanism is used for driving the saw blade to do axial linear reciprocating motion by utilizing power output by the permanent magnet non-induction motor;

the permanent magnet non-induction motor comprises a shell, wherein a permanent magnet rotor, a printed circuit board and a bottom magnet are arranged in the shell, the printed circuit board is electrically connected with a controller through a lead, the printed circuit board and the bottom magnet are fixedly connected in the shell, and an output shaft matched with the transmission mechanism penetrates through the center of the permanent magnet rotor.

Furthermore, the shell comprises an upper shell and a lower shell which are connected through screws, the permanent magnet non-inductive motor is arranged in the lower shell, and the transmission mechanism is arranged in the upper shell;

the transmission mechanism comprises an output gear sleeved on an output shaft and a transmission gear meshed with the output gear, the transmission gear is arranged in the upper housing through a gear shaft, one side of the transmission gear is fixedly connected with a transmission wheel, the circle centers of the transmission wheel and the transmission gear are arranged in a staggered manner, a transmission cam is sleeved outside the transmission wheel, and the transmission wheel is connected with the transmission cam through a bearing; and a transmission connecting rod is arranged at the protruding position of the transmission cam through a rotating shaft, and the tail end of the transmission connecting rod is hinged to the tail end of the saw blade.

Furthermore, the saw bit is close to drive mechanism's one end is equipped with the output seat, the one end of output seat articulate in the end of transmission connecting rod, the other end shaping of output seat has the mounting groove, be equipped with a plurality of locating pins that pass on the output seat the mounting groove, seted up on the saw bit a plurality of with the through-hole that the locating pin position corresponds.

Furthermore, the saw blade is arc-shaped, the radian of the saw blade from one end hinged with the transmission connecting rod to the other end is gradually increased, and the saw teeth of the saw blade are arranged on one bent side of the saw blade.

Furthermore, one end of the shell is connected with a rod-shaped body through a connector, the other end of the body is connected with a power supply part, the power supply part comprises a battery holder shell, a rechargeable battery and a controller electrically connected with the battery are arranged in the battery holder shell, and a control switch electrically connected with the controller is arranged on the battery holder shell; a cavity is formed in the body, and a lead electrically connected with the battery, the controller and the permanent magnet non-induction motor is arranged in the cavity. Further, the body comprises a first rod and a second rod, the first rod can extend into the cavity of the second rod, the length of the first rod is not greater than that of the second rod, a locking device used for adjusting the relative position of the first rod and the second rod is arranged at the joint of the second rod and the first rod, and a containing device used for containing the lead is arranged in the cavity of the first rod or the second rod.

Furthermore, the locking device comprises a plurality of locking claws fixedly connected to the end part of the second rod, the locking claws are uniformly arranged along the outer wall of the first rod, a locking sleeve is sleeved outside the second rod, and matched threads are formed on the inner wall of the locking sleeve and the outer wall of the locking claws; the thickness of the locking claw and the thickness from one end connected with the second rod to the other end are gradually increased, and the thickness of the thickest part of the locking claw is larger than the difference between the inner diameter of the locking sleeve and the radius of the first rod.

Furthermore, the containing device comprises a containing frame, two containing rods which are arranged in parallel are arranged in the containing frame in a penetrating mode, and sleeves which can rotate around the containing rods are sleeved on the two containing rods; the length of the sleeve is smaller than that of the accommodating rod, a torsion spring is further sleeved on one side of the accommodating rod, which is positioned on the sleeve, and two ends of the torsion spring are fixedly connected to the accommodating rod and the sleeve respectively; the conducting wire is wound on the two sleeves in sequence.

Further, still be equipped with wireless charging coil, wireless charging circuit board and the magnetic control switch of electricity connection in the battery seat casing, wireless charging circuit board pass through the circuit with the battery electricity is connected.

Further, the portable reciprocating saw for high-branch cutting is applied to branch treatment of economic forest trees, wherein the economic forest trees refer to fruit trees, horticultural plants and high-branch economic woody plants.

The invention has the beneficial effects that: according to the portable reciprocating saw for pruning high branches, the motor is used as power, so that the problems that the saw using the internal combustion engine as a power source is high in noise, generates combustion waste gas, is inconvenient to maintain for a long time, is not environment-friendly, heavy in equipment, easily pollutes the self and operators and the like in the use process are solved; the body adopts a rod with a cavity, and each part is lighter, so that the whole equipment can be easily operated by women or elderly people; the winding type stator of the traditional motor is changed, the fixed printed circuit board with the magnet at the bottom is used as the stator, the permanent magnet is used as the rotor, the magnetic field of the outer conductor is optimized, the resistance is reduced, the efficiency is improved, and the quality of power equipment is reduced; finally, the output direction of the motor is changed into reciprocating motion similar to that of a manual saw by using the transmission device, so that the working range of the saw is small in the using process, branches beside the saw cannot be influenced during working, and economic loss is avoided.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention,

fig. 2, a schematic diagram I of the internal structure of the housing according to embodiment 1 of the present invention,

fig. 3, schematic view II of the internal structure of the case of embodiment 1 of the present invention,

FIG. 4 is a schematic structural view of a transmission mechanism according to embodiment 1 of the present invention,

FIG. 5 is a schematic view showing the installation of a drive cam according to embodiment 1 of the present invention,

FIG. 6 is a schematic structural diagram of an output base according to embodiment 1 of the present invention,

fig. 7, a schematic view of the mounting of a saw blade according to embodiment 1 of the present invention,

FIG. 8 is a schematic structural view of embodiment 2 of the present invention,

fig. 9, a schematic view of the structure of the locking device of the present invention,

FIG. 10 is a schematic view of the structure of the container of the present invention.

Figure number and name: 1. the device comprises a body, 101, a first rod, 102, a second rod, 103, a locking claw, 104, a locking sleeve, 105, a storage frame, 106, a storage rod, 107, a sleeve, 108, a torsion spring, 2, a working part, 201, a permanent magnet noninductive motor, 202, a transmission mechanism, 203, a saw blade, 204, an upper cover shell, 205, a lower cover shell, 206, a connecting head, 207, a permanent magnet rotor, 208, a printed circuit board, 209, a bottom magnet, 210, an output shaft, 211, an output gear, 212, a transmission gear, 213, an output seat, 214, a transmission wheel, 215, a transmission cam, 216, a transmission connecting rod, 3, a power supply part, 301, a battery seat shell, 4 and a lead.

Detailed Description

To explain the technical content, structural features, attained objects and effects of the present invention in detail, embodiments are described below in detail with reference to the accompanying drawings.

Example 1

Referring to fig. 1, the embodiment provides a portable reciprocating saw for pruning high branches, which includes a working part 2, the working part 2 includes a permanent magnet non-induction motor 201, an output shaft of the permanent magnet non-induction motor 201 is connected with a strip-shaped saw blade 203 through a transmission mechanism 202, and the transmission mechanism 202 is used for driving the saw blade 203 to make an axial linear reciprocating motion by using power output by the permanent magnet non-induction motor 201;

as shown in fig. 2, the permanent magnet non-induction motor 201 includes a housing, a permanent magnet rotor 207, a printed circuit board 208 and a bottom magnet 209 are disposed in the housing, the printed circuit board 208 is electrically connected to the controller through a wire 4, the printed circuit board 208 and the bottom magnet 209 are fixedly connected in the housing, and an output shaft 210 engaged with the transmission mechanism 202 is disposed through the center of the permanent magnet rotor 207.

Referring to fig. 3, the housing includes an upper housing 204 and a lower housing 205 connected by screws, the permanent magnet non-inductive motor 201 is disposed in the lower housing 205, and the transmission mechanism is disposed in the upper housing 204; with reference to fig. 3-5, the transmission mechanism 202 includes an output gear 211 sleeved on the output shaft 210 and a transmission gear 212 engaged with the output gear 211, the transmission gear 212 is disposed in the upper housing through a gear shaft, one side of the transmission gear 212 is fixedly connected with a transmission wheel 214, the transmission wheel 214 is disposed in a staggered manner with a circle center of the transmission gear 212, a transmission cam 215 is sleeved outside the transmission wheel 214, and the transmission wheel 214 is connected with the transmission cam 215 through a bearing; the protruding position of the driving cam 211 is provided with a driving link 216 through a rotation shaft, and the end of the driving link 216 is hinged to the end of the saw blade 203.

As shown in fig. 1, the saw blade 203 is shaped in an arc, the arc of the saw blade 203 gradually increases from one end hinged to the transmission link 216 to the other end, and the teeth of the saw blade 203 are disposed on the bent side of the saw blade 203. As shown in fig. 6 and 7, an output seat 213 is disposed at one end of the saw blade 203 close to the transmission mechanism 202, one end of the output seat 213 is hinged to the end of the transmission link 216, an installation slot is formed at the other end of the output seat 213, a plurality of positioning pins penetrating through the installation slot are disposed on the output seat 213, and a plurality of through holes corresponding to the positioning pins are disposed on the saw blade 203. The structure ensures that the saw blade is convenient to replace after being worn, the cover does not need to be opened, and the operation is convenient; compared with the traditional handheld saw needing fuel oil, on one hand, the use of the fuel oil is reduced, on the other hand, the handheld saw does not generate waste gas in the working process, and is more energy-saving and environment-friendly; in addition, special lubricating oil is not needed to be added in the later maintenance process, and the later maintenance cost is low.

Example 2

As shown in fig. 8, embodiment 2 differs from embodiment 1 in that:

one end of the shell is connected with a rod-shaped body 1 through a connector 206, the other end of the body 1 is connected with a power supply part 3, the power supply part 3 comprises a battery holder shell 301, a rechargeable battery and a controller electrically connected with the battery are arranged in the battery holder shell 301, and a control switch electrically connected with the controller is arranged on the battery holder shell 301; a cavity is formed in the body 1, and a lead 4 electrically connected with the battery, the controller and the permanent magnet non-induction motor 201 is arranged in the cavity 1.

As shown in fig. 9, the body 1 includes a first rod 101 and a second rod 102, the first rod 101 can extend into a cavity of the second rod 102, the length of the first rod 101 is not greater than that of the second rod 102, a locking device for adjusting the relative position of the first rod 101 and the second rod 102 is disposed at the joint of the second rod 102 and the first rod 101, and a receiving device for receiving a wire is disposed in the cavity of the first rod 101 or the second rod 102. The locking device comprises a plurality of locking claws 103 fixedly connected to the end part of the second rod 102, the locking claws 103 are uniformly arranged along the outer wall of the first rod 101, a locking sleeve 104 is sleeved outside the second rod 102, and matched threads are formed on the inner wall of the locking sleeve 104 and the outer wall of the locking claws 103; the thickness of the locking claw 103 from one end to the other end of the second rod 102 is gradually increased, and the thickness of the thickest part of the locking claw 103 is larger than the difference between the inner diameter of the locking sleeve 104 and the radius of the first rod 101, so that the locking sleeve can be pushed inwards when moving upwards to lock the position of the first rod.

As shown in fig. 10, the accommodating device includes an accommodating frame 105, two accommodating rods 106 arranged in parallel are inserted into the accommodating frame 105, and sleeves 107 capable of rotating around the accommodating rods 106 are respectively sleeved on the two accommodating rods 106; the length of the sleeve 107 is smaller than that of the receiving rod 106, a torsion spring 108 is further sleeved on one side, located on the sleeve 107, of the receiving rod 106, and two ends of the torsion spring 108 are fixedly connected to the receiving rod 106 and the sleeve 107 respectively; the wire 4 is in turn wound around two sleeves 107. When guaranteeing to adjust the length of first pole, the wire in the body cavity can not be broken by the stretch-breaking, and when first pole was withdrawed, the wire also can be withdrawed voluntarily, can not twine, knot in the cavity.

The battery holder shell 301 is also internally provided with a wireless charging coil, a wireless charging circuit board and a magnetic control switch which are electrically connected, and the wireless charging circuit board is electrically connected with the battery through a circuit. When the battery is charged, the charging can be completed by directly placing the battery near a charging seat without using a power line for charging.

The portable reciprocating saw for high-branch cutting is applied to branch treatment of economic forest trees, such as fruit trees, horticultural plants and high-branch economic woody plants. The using process is as follows:

firstly, an operator adjusts the relative position of a first rod and a second rod according to the height of a tree to be cut, then the first rod and the second rod are locked by a locking device, then the body is directly held by two hands, and a switch of a power supply part is operated to finish the repair of a branch of the target tree; after the work is finished, the locking is released, the first rod is completely retracted into the second rod, the occupied volume is reduced, and then the first rod is placed near a charging seat to finish automatic charging for the next use. The switch can be a normal pressure type switch, when the hand of an operator leaves the switch, the motor stops working, and potential safety hazards caused by the fact that the body slides off the hand of the operator in a working process are prevented.

Therefore, the invention is not limited to the specific embodiments and examples, but rather, all equivalent variations and modifications are within the scope of the invention as defined in the claims and the specification.

Claims

1. The utility model provides a portable drag saw that branches of tall trees was tailor, includes work portion (2), its characterized in that: the working part (2) comprises a permanent magnet non-induction motor (201), an output shaft of the permanent magnet non-induction motor (201) is connected with a strip-shaped saw blade (203) through a transmission mechanism (202), and the transmission mechanism (202) is used for driving the saw blade (203) to do axial linear reciprocating motion by utilizing power output by the permanent magnet non-induction motor (201);

the permanent magnet non-induction motor (201) comprises a shell, wherein a permanent magnet rotor (207), a printed circuit board (208) and a bottom magnet (209) are arranged in the shell, the printed circuit board (208) is electrically connected with a controller through a lead (4), the printed circuit board (208) and the bottom magnet (209) are fixedly connected in the shell, and an output shaft (210) matched with the transmission mechanism (202) penetrates through the center of the permanent magnet rotor (207);

one end of the shell is connected with a rod-shaped body (1) through a connector (206), the other end of the body (1) is connected with a power supply part (3), the power supply part (3) comprises a battery holder shell (301), a rechargeable battery and a controller electrically connected with the battery are arranged in the battery holder shell (301), and a control switch electrically connected with the controller is arranged on the battery holder shell (301); a cavity is formed in the body (1), and a lead (4) electrically connected with the battery, the controller and the permanent magnet non-induction motor (201) is arranged in the cavity;

the body (1) comprises a first rod (101) and a second rod (102), the first rod (101) can extend into a cavity of the second rod (102), the length of the first rod (101) is not more than that of the second rod (102), a locking device for adjusting the relative positions of the first rod (101) and the second rod (102) is arranged at the joint of the second rod (102) and the first rod (101), and a containing device for containing the lead is arranged in the cavity of the first rod (101) or the second rod (102);

the locking device comprises a plurality of locking claws (103) fixedly connected to the end part of the second rod (102), the locking claws (103) are uniformly arranged along the outer wall of the first rod (101), a locking sleeve (104) is sleeved outside the second rod (102), and matched threads are formed on the inner wall of the locking sleeve (104) and the outer wall of the locking claw (103); the thickness of the locking claw (103) is gradually increased from one end connected with the second rod (102) to the other end, and the thickness of the thickest part of the locking claw (103) is larger than the difference between the inner diameter of the locking sleeve (104) and the radius of the first rod (101).

2. The portable jigsaw of claim 1, wherein: the shell comprises an upper cover shell (204) and a lower cover shell (205) which are connected through screws, the permanent magnet non-inductive motor (201) is arranged in the lower cover shell (205), and the transmission mechanism is arranged in the upper cover shell (204);

the transmission mechanism (202) comprises an output gear (211) sleeved on an output shaft (210) and a transmission gear (212) meshed with the output gear (211), the transmission gear (212) is arranged in the upper housing through a gear shaft, one side of the transmission gear (212) is fixedly connected with a transmission wheel (214), the transmission wheel (214) and the circle center of the transmission gear (212) are arranged in a staggered mode, a transmission cam (215) is sleeved outside the transmission wheel (214), and the transmission wheel (214) is connected with the transmission cam (215) through a bearing; a transmission connecting rod (216) is arranged at the protruding position of the transmission cam (211) through a rotating shaft, and the tail end of the transmission connecting rod (216) is hinged to the tail end of the saw blade (203).

3. The portable jigsaw of claim 2, wherein: saw bit (203) are close to the one end of drive mechanism (202) is equipped with output seat (213), the one end of output seat (213) articulate in the end of drive connecting rod (216), the other end shaping of output seat (213) has the mounting groove, be equipped with a plurality of passes on output seat (213) the locating pin of mounting groove, set up on saw bit (203) a plurality of with the through-hole that the locating pin position corresponds.

4. A portable jigsaw of high pruning according to claim 3 and wherein: the saw blade (203) is arc-shaped, the radian of the saw blade (203) from one end hinged with the transmission connecting rod (216) to the other end is gradually increased, and the saw teeth of the saw blade (203) are arranged on one bent side of the saw blade (203).

5. The portable jigsaw of claim 1, wherein: the storage device comprises a storage frame (105), two storage rods (106) which are arranged in parallel are arranged in the storage frame (105) in a penetrating mode, and sleeves (107) which can rotate around the storage rods (106) are sleeved on the two storage rods (106); the length of the sleeve (107) is smaller than that of the accommodating rod (106), a torsion spring (108) is further sleeved on one side, located on the sleeve (107), of the accommodating rod (106), and two ends of the torsion spring (108) are fixedly connected to the accommodating rod (106) and the sleeve (107) respectively; the conducting wire (4) is wound on the two sleeves (107) in sequence.

6. The portable jigsaw of claim 1, wherein: still be equipped with wireless charging coil, wireless charging circuit board and the magnetic control switch of electricity connection in the battery holder casing (301), wireless charging circuit board pass through the circuit with the battery electricity is connected.

7. Use of a portable reciprocating saw for pole cutting according to any one of claims 1 to 6, wherein: the portable reciprocating saw cut by the high branches is applied to branch treatment of economic forest trees, wherein the economic forest trees refer to fruit trees, horticultural plants and high-branch economic woody plants.