CN114190182B

CN114190182B - High branch saw

Info

Publication number: CN114190182B
Application number: CN202111370036.5A
Authority: CN
Inventors: 李思尧; 肖明华; 王京; 廖金山; 佟纪超; 佘乐欣; 叶启彬
Original assignee: Shenzhen Power Supply Bureau Co Ltd
Current assignee: Shenzhen Power Supply Bureau Co Ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2023-03-03
Anticipated expiration: 2041-11-18
Also published as: CN114190182A

Abstract

The invention relates to a pole pruning saw, which comprises a saw disc, a power mechanism, a transmission mechanism and a stop mechanism, wherein the transmission mechanism is arranged between the power mechanism and the saw disc and comprises a first rod section and a second rod section, the first rod section is connected with the saw disc, and the second rod section is connected with the power mechanism. The stop mechanism comprises a pushing piece, a locking assembly and an elastic piece, wherein the pushing piece is connected with the first rod section. The locking assembly is capable of locking the pusher in the first position when in the locked state, thereby connecting the first pole segment with the second pole segment. The locking assembly can be switched to a releasing state from a locking state when electrified, the pushing piece is released by the locking assembly when the locking assembly is in the releasing state, and at the moment, the elastic piece can drive the pushing piece to be switched to a second position from a first position, so that the first rod section is disconnected with the second rod section. Namely, after the high-branch saw cuts off part of the electric wires, the saw disc can stop cutting, and the potential safety hazard of secondary damage caused by complete cutting off of the electric wires due to continuous cutting of the high-branch saw is prevented.

Description

High branch saw

Technical Field

The invention relates to the technical field of branch pruning, in particular to a high branch saw.

Background

Distribution line is built on stilts is a common arrangement mode of electric wires, but there is the tree line hidden danger between a small part of distribution line and the trees that are used for city beautification, especially the trees of distribution line downside, and the pruning work of these trees becomes a key problem whether safe operation can be done for city line. The trees can contact with the line due to self-growth, so that interphase short circuit is caused, large-area power failure accidents are often caused, and the high-voltage current can hurt passing workers.

The branches of tall trees saw of traditional mode includes the knife rest and sets up the cutter in knife rest one end, and the one end that is close to the cutter on the knife rest is provided with the camera of observing the branch condition of pruning, and the one end of keeping away from the cutter on the knife rest is equipped with the LED display screen, and the signal of telecommunication of camera is carried to the display screen, and the staff passes through the display screen and observes the branch condition of pruning. However, due to the shielding of other shielding objects such as branches and the like, the limited visual angle, and the influence of light on the display screen in the daytime, the visualization is not high, and the risk of cutting the live wire still exists.

After the electric wire is partially cut off, the high-branch saw is still in a high-speed cutting state, and the potential safety hazard of secondary damage caused by completely cutting off the electric wire exists.

Disclosure of Invention

In view of this, it is necessary to provide a pole saw for solving the problem that the pole saw is still in a high-speed cutting state after the electric wire is cut.

A pole saw, comprising:

the saw disc is used for cutting branches;

a power mechanism;

the transmission mechanism comprises a first rod section and a second rod section along a first direction in the length direction, one end, far away from the second rod section, of the first rod section is connected with the saw disc, and one end, far away from the first rod section, of the second rod section is connected with the power mechanism;

the stopping mechanism comprises a pushing piece, a locking assembly and an elastic piece;

the pusher has a first position and a second position along the first direction relative to the second segment, the pusher is connected with the first segment, the first segment is connected with the second segment when the pusher is in the first position, and the first segment is disconnected with the second segment when the pusher is in the second position;

the locking assembly has a locking state and a releasing state, the locking assembly can lock the pushing piece at a first position in the locking state, the locking assembly releases the pushing piece in the releasing state, and the locking assembly can be switched from the locking state to the releasing state when electrified;

when the pushing piece is released by the locking assembly, the elastic piece can drive the pushing piece to be switched from the first position to the second position.

In one embodiment, the transmission mechanism comprises a housing, the first rod segment, the second rod segment and a stop mechanism are arranged in the housing, the locking assembly comprises a hook, the hook is rotatably connected with the housing, the hook has a first angle and a second angle relative to the housing, the locking assembly is in a locking state when the hook is at the first angle, and the hook is hooked with the pushing piece; when the hook is at a second angle, the locking assembly is in a release state, and the hook releases the pushing piece.

In one embodiment, the locking assembly further comprises:

the first suction piece is arranged at one end of the hook, which is far away from the pushing piece;

the second adsorption piece is arranged on the shell or the second rod section, the second adsorption piece and the pushing piece are positioned on the same side of the hook along a second direction, and the second direction is vertical to the first direction;

when the first adsorption part and/or the second adsorption part are charged, the first adsorption part can adsorb with the second adsorption part, so that the hook is switched from a first angle to a second angle.

In one embodiment, one of the first and second attraction members is an electromagnet, and the other is an electromagnet/magnet.

In one embodiment, a stopping portion is arranged on the pushing member, the elastic member is sleeved on the pushing member, one end of the elastic member, which is close to the first rod section, abuts against the stopping portion, and one end of the elastic member, which is far away from the first rod section, abuts against the shell.

In one embodiment, the first rod section is provided with a plurality of teeth arranged at intervals, a tooth groove is formed between every two adjacent teeth, the pushing piece is provided with an avoiding opening, and the stopping mechanism further comprises an elastic positioning piece;

when the pushing piece is at the first position, the avoidance port and the elastic positioning piece are staggered;

when the pushing piece is at the second position, the avoiding opening corresponds to the elastic positioning piece in position, and the elastic positioning piece penetrates through the avoiding opening by means of elasticity and extends into the tooth groove of the first rod section to stop the rotation of the first rod section.

In one embodiment, the plurality of spaced apart teeth are located on the end of the first segment adjacent to the connection to the second segment, the first segment being in toothed connection with the second segment.

In one embodiment, the elastic positioning element is a spring bolt.

In one embodiment, the housing is made of an insulating material.

In one embodiment, the pole pruning saw further comprises a near electric inductor and an alarm, the near electric inductor is installed on the transmission mechanism and close to one side of the saw disc, the alarm is installed on the transmission mechanism and close to one side of the power mechanism, and the near electric inductor is in wireless connection with the alarm.

According to the high-branch saw, the stopping mechanism is arranged, the locking assembly is not electrified when the high-branch saw is in a normal operation state, the locking assembly is connected with the pushing piece and locks the pushing piece at the first position, so that the first rod section is connected with the second rod section, and power generated by the power mechanism can be transmitted to the saw disc sequentially through the second rod section and the first rod section. At the same time, the resilient member is in a compressed state, the resilient member having a tendency to urge the first segment away from the second segment in a first direction.

When the high branch saw cuts off part of the electric wires, the locking assembly is electrified, the pushing piece is released by the locking assembly, and the locking assembly is disconnected with the pushing piece. At the moment, the elastic part pushes the pushing part to the second position under the action of the elastic force, meanwhile, the pushing part pushes the first rod section, so that the transmission between the first rod section and the second rod section is disconnected, the second rod section only idles under the action of the power mechanism, and cannot be transmitted to the saw disc through the first rod section. Therefore, the cutting of the saw disc can be stopped after the high-branch saw cuts off part of the electric wire, and the potential safety hazard of secondary damage caused by complete cutting off of the electric wire due to the fact that the high-branch saw is in a continuous high-speed cutting state is prevented.

Drawings

FIG. 1 is a schematic view of an embodiment of a pole saw;

FIG. 2 is a schematic view of the stopping mechanism with the pusher in the first position;

FIG. 3 is a schematic view of the stop mechanism with the pusher member in the second position.

Reference numerals: 100-saw disc;

200-a power mechanism;

400-a transmission mechanism; 410-a first pole segment; 411-teeth; 420-a second pole segment; 430-a housing;

500-a stop mechanism; 510-a pusher; 511-a stopper; 512-a trench; 513-dodging port; 520-an elastic member; 530-a locking assembly; 531-a first suction attachment; 532-a hook; 533-a second absorbent member; 540-elastic positioning element;

710-near electric inductor; 720-alarm.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3, an embodiment of the present invention provides a pole pruning saw, which includes a saw disc 100, a power mechanism 200, a transmission mechanism 400, and a stop mechanism 500, wherein the saw disc 100 is used for cutting branches. One end of the transmission mechanism 400 is connected to the output end of the power mechanism 200, and the other end is connected to the saw disc 100, and is configured to transmit power generated by the power mechanism 200 to the saw disc 100, the transmission mechanism 400 includes a first rod segment 410 and a second rod segment 420 along a first direction, one end of the first rod segment 410, which is far away from the second rod segment 420, is connected to the saw disc 100, and one end of the second rod segment 420, which is far away from the first rod segment 410, is connected to the power mechanism 200.

The stopping mechanism 500 includes a pusher 510, an elastic member 520, and a locking assembly 530. The pusher 510 has a first position and a second position in a first direction relative to the second pole segment 420, the pusher 510 being connected to the first pole segment 410, the first pole segment 410 being connected to the second pole segment 420 when the pusher 510 is in the first position, and the first pole segment 410 being disconnected from the second pole segment 420 when the pusher 510 is in the second position. The locking assembly 530 has a locking state and a releasing state, the locking assembly 530 can lock the pushing member 510 at the first position when in the locking state, the locking assembly 530 releases the pushing member 510 when in the releasing state, and the locking assembly 530 can be switched from the locking state to the releasing state when electrified. When the locking assembly 530 releases the pushing member 510, the elastic member 520 can drive the pushing member 510 to switch from the first position to the second position.

In the present embodiment, by providing the stopping mechanism 500, referring to fig. 2, in a normal operation state of the pole pruning saw, that is, the saw disc 100 is in a state of normally cutting branches, the saw disc 100 is not cut off the electric wire, so the locking assembly 530 is not electrified, at this time, the locking assembly 530 is connected with the pushing member 510 and locks the pushing member 510 at the first position, so that the first rod segment 410 and the second rod segment 420 are connected, that is, the power generated by the power mechanism 200 can be transmitted to the saw disc 100 through the second rod segment 420 and the first rod segment 410 in sequence. At the same time, the resilient member 520 is in a compressed state, the resilient member 520 having a tendency to urge the first segment 410 away from the second segment 420 in a first direction.

Referring to fig. 3, when the pole saw cuts off a portion of the wires, the locking assembly 530 is electrified due to the conductive function of the saw disc 100 and the transmission mechanism 400, and the locking assembly 530 releases the pushing member 510, i.e., the locking assembly 530 is disconnected from the pushing member 510. At this time, the elastic member 520 pushes the pushing member 510 to the second position under the action of the elastic force, and at the same time, the pushing member 510 pushes the first rod segment 410, so that the transmission between the first rod segment 410 and the second rod segment 420 is disconnected, and the second rod segment 420 only idles under the action of the power mechanism 200 and cannot be transmitted to the saw disc 100 through the first rod segment 410. Therefore, after the high-branch saw cuts off partial electric wires, the saw disc can stop cutting, and the potential safety hazard of secondary damage caused by complete cutting off of the electric wires due to the fact that the high-branch saw is in a continuous high-speed cutting state is prevented.

In some embodiments, the transmission mechanism 400 includes a housing 430, the first rod segment 410, the second rod segment 420, and the stop mechanism 500 are disposed in the housing 430, the locking assembly 530 includes a hook 532, the hook 532 is rotatably coupled to the housing 430, the hook 532 has a first angle and a second angle relative to the housing 430, the locking assembly 530 is in a locked state when the hook 532 is at the first angle, and the hook 532 is hooked with the push member 510; when the hook 532 is at the second angle, the locking assembly 530 is in a release state, and the hook 532 releases the push member 510; when the locking assembly 530 is energized, the hook 532 switches from a first angle to a second angle.

In this embodiment, when the hook 532 is at the first angle, the length direction of the hook 532 may be along the first direction, and the end of the pushing member 510 close to the hook 532 is provided with the groove 512, at this time, the hook 532 is hooked with the groove 512. When the hook 532 is at the second angle, the length direction of the hook 532 is at any angle between 0 ° and 90 ° with respect to the first direction, and the hook 532 is disconnected from the groove 512, i.e. the hook 532 releases the push member 510.

In some embodiments, the locking assembly further comprises a first suction member 531 and a second suction member 533, the first suction member 531 being disposed at an end of the hook 532 remote from the push member 510. The second suction member 533 is disposed on the housing 430 or the second rod segment 420, and the second suction member 533 and the pushing member 510 are located on the same side of the hook 532 along a second direction, which is perpendicular to the first direction. When the first suction member 531 and/or the second suction member 533 are charged, the first suction member 531 can suck with the second suction member 533, so that the hook 532 is switched from the first angle to the second angle.

In this embodiment, when the high-branch saw cuts off a part of the electric wires, at least one of the first suction member 531 and/or the second suction member 533 is charged to have a suction effect, at this time, the first suction member 531 can be sucked to the second suction member 533 located at one end of the first suction member 531, and due to the lever principle, the hook 532 located at the other end of the first suction member 531 tilts upward, that is, the hook 532 is switched from the first angle to the second angle, and the hook 532 is disconnected from the groove 512.

Further, one of the first adsorption member 531 and the second adsorption member 533 is an electromagnet, and the other is an electromagnet/magnet.

In one embodiment, the first suction member 531 is an electromagnet, and since the first suction member 531 is electrically connected to the first rod segment 410 through the push member 510 at the moment when the pole saw cuts off a portion of the electric wire, the electromagnet serving as the first suction member 531 can be charged to have an attraction function, and at this time, the second suction member 533 is a magnet or an electromagnet capable of attracting the first suction member 531, and the first suction member 531 attracts the second suction member 533.

In another embodiment, the second absorbing member 533 may be an electromagnet, and the second absorbing member 533 is connected to the second rod segment 420 through a bearing, or directly connected to the housing 430, when the pole saw cuts off a portion of the electric wire, since the second absorbing member 533 is electrically conductive with the second rod segment 420 or the housing 430, the electromagnet serving as the second absorbing member 533 is charged to have an absorbing function, and the first absorbing member 531 is a magnet or an electromagnet capable of absorbing with the second absorbing member 533.

In some embodiments, the pushing member 510 is provided with a stopping portion 511, the elastic member 520 is sleeved on the pushing member 510, one end of the elastic member 520 close to the first rod section 410 abuts against the stopping portion 511, and one end of the elastic member 520 far from the first rod section 410 abuts against the housing 430.

In this embodiment, the pushing member 510 is connected to the first rod segment 410 at one end, and extends to an end away from the first rod segment 410 at the other end, and the locking assembly 530 is disposed on a side of the pushing member 510 away from the first rod segment 410. In particular, the pusher 510 may be coupled to the first pole segment 410 by a bearing, and the pusher 510 does not follow the rotation of the first pole segment 410 when the first pole segment 410 rotates. Since the end of the elastic member 520 away from the first rod segment 410 abuts against the housing 430 and the end of the elastic member 520 close to the first rod segment 410 abuts against the stopper 511, when the locking assembly 530 locks the pushing member 510 in the first position, the elastic member 520 can be compressed between the stopper 511 and the housing 430, and when the pushing member 510 is released by the locking assembly 530, the compression action of the stopper 511 on the elastic member 520 is disabled, and the elastic member 520 can push the pushing member 510 to move from the first position to the second position.

In some embodiments, the first rod segment 410 has a plurality of teeth 411 arranged at intervals, a tooth space is formed between adjacent teeth 411, the pushing member 510 has an avoiding opening 513, and the stopping mechanism 500 further includes an elastic positioning member 540. When the pusher 510 is in the first position, the escape opening 513 is offset from the resilient positioning member 540. When the pushing member 510 is in the second position, the avoiding opening 513 corresponds to the position of the elastic positioning member 540, and the elastic positioning member 540 passes through the avoiding opening 513 by elasticity and extends into the tooth slot of the first rod segment to prevent the first rod segment 410 from rotating.

In this embodiment, since the pole segment 410 still has the inertia of rotation in case the first pole segment 410 and the second pole segment 420 are suddenly disconnected when the pole saw is operated at a high speed, the saw disc 100 cannot be stopped completely and immediately. By providing the elastic positioning element 540, referring to fig. 2, when the pushing element 510 is in the first position in a normal operating state of the pole pruning saw, the avoiding opening 513 is staggered from the elastic positioning element 540, that is, the pushing element 510 can prevent the elastic positioning element 540 from popping out, so that the elastic positioning element 540 does not work. Referring to fig. 3, when the pole pruning saw cuts off a part of the wires, when the pushing member 510 is in the second position, the avoiding opening 513 corresponds to the elastic positioning member 540, and the elastic positioning member 540 passes through the avoiding opening 513 by means of elastic force and extends into the tooth groove of the first rod section 410, so as to rapidly prevent the first rod section 410 from rotating under the inertia condition.

Further, a plurality of teeth 411 are spaced apart at the end of the first pole segment 410 adjacent to the end of the second pole segment 420 to which the first pole segment 410 is attached, and the second pole segment 420 is toothed. Meanwhile, when the pushing member 510 is in the second position, the avoiding opening 513 corresponds to the elastic positioning member 540, and the elastic positioning member 540 passes through the avoiding opening 513 and extends into the tooth groove after the first rod section 410 and the second rod section 420 are disconnected.

Specifically, the elastic positioning member 540 is a spring latch.

In some embodiments, to prevent the pole saw from accidentally cutting the wire and causing an electrical shock to the worker, the housing 430 is made of an insulating material. When the pole pruning saw is used, the part of the shell 430 which is in contact with the working personnel has insulation, so that the personal safety of the working personnel can be ensured.

In some embodiments, the pole pruning saw further comprises a near electric sensor 710, the near electric sensor 710 being mounted on the transmission mechanism 400 near a side of the saw disc 100.

In the embodiment, the near-electric sensor 710 is arranged on one side of the saw disc 100, when the saw disc 100 is close to the high-voltage power supply, the near-electric sensor 710 gives out an audible and visual alarm, so that a worker can be reminded to pay attention to the fact that the saw disc is far away from the high-voltage power supply.

Further, an alarm 720 of the near electric sensor 710 is installed on the transmission mechanism 400 and near one side of the power mechanism 200, and the near electric sensor 710 is wirelessly connected with the alarm 720.

In this embodiment, the alarm 720 is disposed at one side of the power mechanism 200, that is, the alarm 720 is disposed close to the operator, so that the influence of the cutting sound of the saw disc 100 on the alarm sound can be reduced, and the safety of the pole saw can be improved. Meanwhile, the risk that the live wire is easily cut due to the fact that the sight line is blocked due to the current mode of arranging the camera can be avoided.

In some embodiments, the second pole segment 420 is a telescoping pole. The staff can be according to the branch height of the required cutting of reality, adjusts the length of telescopic link, convenient to use.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A pole saw, comprising:

the saw disc is used for cutting branches;

a power mechanism;

the transmission mechanism comprises a first rod section and a second rod section, the length direction of the first rod section is along the first direction, one end, far away from the second rod section, of the first rod section is connected with the saw disc, and one end, far away from the first rod section, of the second rod section is connected with the power mechanism; and

when the pushing piece is released by the locking assembly, the elastic piece can drive the pushing piece to be switched from the first position to the second position;

the transmission mechanism comprises a shell, the first rod section, the second rod section and the stop mechanism are arranged in the shell, the locking assembly comprises a hook, the hook is rotatably connected with the shell, the hook has a first angle and a second angle relative to the shell, when the hook is at the first angle, the locking assembly is in a locking state, and the hook is hooked with the pushing piece; when the hook is at a second angle, the locking assembly is in a release state, and the hook releases the pushing piece;

the locking assembly further comprises a first adsorption piece and a second adsorption piece, and the first adsorption piece is arranged at one end, far away from the pushing piece, of the hook; the second adsorption piece is arranged on the shell or the second rod section, the second adsorption piece and the pushing piece are positioned on the same side of the hook along a second direction, and the second direction is vertical to the first direction; when the first adsorption part and/or the second adsorption part are charged, the first adsorption part can adsorb with the second adsorption part, so that the hook is switched from a first angle to a second angle.

2. The pole saw as claimed in claim 1, wherein one of the first and second attraction members is an electromagnet and the other is an electromagnet/magnet.

3. The pole saw as claimed in claim 1, wherein the pushing member is provided with a stop portion, the elastic member is sleeved on the pushing member, one end of the elastic member close to the first pole segment abuts against the stop portion, and one end of the elastic member far from the first pole segment abuts against the housing.

4. The pole saw as claimed in claim 1, wherein the first pole segment has a plurality of teeth spaced apart from each other, a tooth space is formed between adjacent teeth, the pushing member has an avoiding opening, and the stopping mechanism further includes an elastic positioning member;

when the pushing piece is at the second position, the avoiding opening corresponds to the elastic positioning piece in position, and the elastic positioning piece penetrates through the avoiding opening by means of elasticity and extends into the tooth groove of the first rod section to prevent the first rod section from rotating.

5. The pole saw of claim 4 wherein the plurality of spaced apart teeth are located at an end of the first pole segment adjacent to the connection of the second pole segment, the first pole segment being in toothed connection with the second pole segment.

6. The pole saw as claimed in claim 5, wherein the resilient positioning member is a spring loaded latch.

7. The pole saw of claim 1 wherein the housing is made of an insulating material.

8. The pole pruning saw as claimed in claim 1, further comprising a near-electric sensor and an alarm, wherein the near-electric sensor is mounted on the transmission mechanism and close to one side of the saw disc, the alarm is mounted on the transmission mechanism and close to one side of the power mechanism, and the near-electric sensor is in wireless electrical connection with the alarm.