CN113146750B - Chain saw - Google Patents
Chain saw Download PDFInfo
- Publication number
- CN113146750B CN113146750B CN202110392424.7A CN202110392424A CN113146750B CN 113146750 B CN113146750 B CN 113146750B CN 202110392424 A CN202110392424 A CN 202110392424A CN 113146750 B CN113146750 B CN 113146750B
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- Prior art keywords
- self
- elastic piece
- push rod
- chain
- stop block
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B17/00—Chain saws; Equipment therefor
- B27B17/14—Arrangements for stretching the chain saw
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/08—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws
- B28D1/082—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with saw-blades of endless cutter-type, e.g. chain saws, i.e. saw chains, strap saws consisting of chain saws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
- B28D1/12—Saw-blades or saw-discs specially adapted for working stone
- B28D1/124—Saw chains; rod-like saw blades; saw cables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Mining & Mineral Resources (AREA)
- Sawing (AREA)
Abstract
The invention discloses a chain saw, which comprises a shell, a chain plate, a saw chain and a tensioning and locking device, wherein the tensioning and locking device comprises a push rod, a first elastic piece, a second elastic piece and a self-locking stop block; the self-locking stop block is connected with the push rod, a second elastic piece is connected between the self-locking stop block and the shell, and the second elastic piece is matched with the self-locking stop block to lock the push rod. When the chain saw is applied, the second elastic piece is matched with the self-locking stop block, so that the position of the push rod can be locked, the chain plate can be propped against the chain plate, the chain plate is prevented from retreating relative to the chain wheel, the chain plate is prevented from being displaced even if the chain plate is subjected to a large instant impact force, the saw chain is prevented from loosening, and the frequency of tension degree adjusting operation is reduced.
Description
Technical Field
The invention belongs to the field of garden tools, and particularly relates to a chain saw.
Background
Chain saw is a common gardening tool, and is often used for cutting wood, stone and other materials. The cutting part needs a saw chain to circularly run to realize continuous cutting of materials, and the tension degree of the saw chain needs to be adjusted in the process of installing the saw chain on the shell, so that a good cutting effect can be obtained. And during the cutting operation the saw chain may loose due to wear and thermal expansion, in which case the tension of the saw chain also needs to be adjusted. The operation of adjusting the tension degree needs manual adjustment by an operator, so that the operator has certain operation requirements, an ordinary consumer is difficult to grasp the adjustment force in the operation process, and the operator needs to carry an adjustment tool, so that the operation is very inconvenient.
Therefore, a design for realizing automatic tensioning by using an elastomer is generated in the market, specifically, when the saw chain is loosened somewhat, the chain plate for fixing the saw chain is driven to move forward by using the elastic force of the elastomer, so that the saw chain is driven to be tensioned again. However, this design has the following problems during actual use: even if the chain plate is fixed on the shell by using the fastener, the chain plate for fixing the saw chain can be displaced due to overlarge instant impact force applied to the saw chain during cutting operation, so that the chain plate can be retracted relative to the chain wheel, and the saw chain can be loosened again. Therefore, the chain saw with the structure always needs to be repeatedly tensioned and adjusted in the use process, is inconvenient to operate and affects the service life of the chain saw.
Disclosure of Invention
The invention aims to provide a chain saw, which can effectively solve the problem that when in use, a chain plate is displaced due to instant impact force to cause the loosening of a saw chain, and can conveniently and rapidly adjust the tension degree after the saw chain is loosened due to long-time work.
In order to solve the technical problems, the invention adopts the following technical scheme: the chain saw comprises a shell, a chain plate and a saw chain, and further comprises a tensioning locking device, wherein the tensioning locking device comprises a push rod, a first elastic piece, a second elastic piece and a self-locking stop block, the chain plate is connected with the push rod, the first elastic piece is connected between the push rod and the shell, and the first elastic piece is used for driving the push rod to push the chain plate to move forwards; the self-locking stop block is connected with the push rod, the second elastic piece is connected between the self-locking stop block and the shell, and the second elastic piece is matched with the self-locking stop block to lock the push rod.
Preferably, the self-locking stop block is provided with a through hole for the push rod to pass through, the self-locking stop block is sleeved on the push rod, and an inclined locking angle is formed between the self-locking stop block and the push rod under the action of the elastic force of the second elastic piece. Under the action of the elastic force of the second elastic piece, the self-locking stop block inclines relative to the push rod to form an inclined locking angle, namely, the position of the push rod is locked by utilizing the friction force between the inner wall of the through hole and the surface of the push rod. When the push rod is used for pushing the chain plate to adjust the tension, a user only needs to overcome the elasticity of the second elastic piece to the self-locking stop block to separate the inner wall of the through hole from the surface of the push rod, and the operation is simple and convenient.
Preferably, the second elastic member is a spring, one end of the second elastic member is connected with the self-locking stop block, the other end of the second elastic member is connected with the casing, the self-locking stop block is rotationally connected with the casing, and the connection point of the second elastic member and the self-locking stop block and the turning point of the self-locking stop block are staggered with each other. The elastic force of the second elastic piece is utilized to drive the self-locking stop block to rotate relative to the shell, so that the self-locking stop block inclines relative to the push rod to form an inclined locking angle.
Preferably, the second elastic piece is sleeved on the push rod. Therefore, the second elastic piece is directly connected to the self-locking stop block of the through hole periphery, the second elastic piece can be limited by the push rod, so that the second elastic piece can deform or displace along the radial direction, and the occupied space can be reduced.
Preferably, the self-locking stop block is rotationally connected with the casing through a first pin shaft, one end of the second elastic piece is connected with the end part of the self-locking stop block, and the distance between the connecting point of the second elastic piece and the self-locking stop block and the first pin shaft is larger than the distance between the first pin shaft and the through hole. According to the lever principle, the distance between the connecting point of the second elastic piece and the self-locking stop block and the first pin shaft can be understood as a first force arm, the distance between the first pin shaft and the through hole can be understood as a second force arm, the first force arm is designed to be larger than the second force arm, it can be understood that an operator can rotate the self-locking stop block with smaller force when the tension degree of the chain saw needs to be adjusted, and when the self-locking stop block inclines relative to the push rod, the acting force of the inner wall of the through hole on the push rod is larger, the generated friction force is also larger, and the locking effect is better.
Preferably, the second elastic piece is a torsion spring, the self-locking stop block is rotationally connected to the casing through a second pin shaft, the second elastic piece is sleeved on the second pin shaft, one end of the second elastic piece is connected with the self-locking stop block, and the other end of the second elastic piece is connected with the second pin shaft. The torsion generated by the torsion spring drives the self-locking stop block to rotate relative to the shell, so that the self-locking stop block inclines relative to the push rod to form an inclined locking angle.
Preferably, friction protrusions are arranged on the inner wall of the through hole. The friction force between the inner wall of the through hole and the push rod can be increased, and a better locking effect is obtained.
Preferably, the casing is provided with a limiting plate for the push rod to pass through, the push rod is provided with a limiting stop block, the first elastic piece is a spring, the first elastic piece is sleeved on the push rod, one end of the first elastic piece is connected to the limiting plate, and the other end of the first elastic piece is connected to the limiting stop block.
Preferably, a chain wheel is arranged in the shell, a gap is reserved between the chain wheel and the chain plate, a jacking column extending into the gap is arranged on the push rod, and the jacking column is connected with the chain plate and used for pushing the chain plate to move forward.
Preferably, the casing is provided with a compression knob and a bolt, the chain plate is provided with a slotted hole for the bolt to pass through, the length direction of the slotted hole is consistent with the length direction of the chain plate, and the bolt passes through the slotted hole and is in threaded connection with the compression knob.
Compared with the prior art, the invention has the following beneficial effects:
1. the chain saw is characterized in that the first elastic piece and the push rod are arranged, when the saw chain is loosened due to abrasion and heating expansion after the chain saw works for a long time, the push rod can be driven by the first elastic piece to push the chain plate to move forward, so that the chain plate drives the saw chain to be tensioned relative to the chain wheel, an adjusting tool is not required to be additionally carried, and the operation of a user is facilitated;
2. the second elastic piece and the self-locking stop block are arranged and matched with each other to lock the position of the push rod, so that in the process of installing the chain plate and the saw chain on the shell, the push rod can be reversely pulled first and locked in position through the second elastic piece and the self-locking stop block, and the front end of the push rod, the chain plate and the saw chain are kept in a gap, so that the installation of the chain plate and the saw chain is not influenced;
3. after the saw chain tension is adjusted in place, the second elastic piece and the self-locking stop block are used for locking the position of the push rod, in the working process of the chain saw, even if the saw chain is subjected to a large instant impact force, the chain plate cannot generate displacement under the action of the push rod due to the fact that the position of the push rod is locked, the saw chain can keep the tension, the frequency of tensioning adjustment operation is effectively reduced, and the service life of the chain saw is prolonged.
Drawings
An exploded view of a chain saw is provided in the first embodiment of fig. 1;
FIG. 2 is a schematic view of a pushrod, self-locking stop and second resilient member in a chain saw according to an embodiment;
FIG. 3 is a cross-sectional view of a first embodiment of a chain saw in an installed state;
FIG. 4 is a cross-sectional view of a chain saw in tension adjustment;
FIG. 5 is a schematic view of a push rod, a self-locking stop and a second resilient member in a chain saw according to a second embodiment;
fig. 6 provides a schematic view of a push rod, a self-locking stop and a second resilient member in a chain saw according to a third embodiment.
Wherein: 1. the device comprises a shell, a main shell, 100 parts of bolts, 11 parts of side covers, 110 parts of limiting plates, 111 parts of first pins, 112 parts of second pins, 113 parts of limiting protrusions, 114 parts of compression knobs, 12 parts of cover bodies, 2 parts of chain wheels, 3 parts of chain plates, 30 parts of oblong holes, 4 parts of saw chains, 5 parts of push rods, 50 parts of limiting stop blocks, 51 parts of top posts, 6 parts of first elastic elements, 7 parts of second elastic elements and 8 parts of self-locking stop blocks. Alpha is the tilt lock angle.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Embodiment one: as shown in fig. 1, the chain saw provided in this embodiment includes a casing 1, a sprocket 2, a chain plate 3 and a saw chain 4, wherein the casing 1 includes a main casing 10, a cover 12 disposed on one side of the main casing 10, and a side cover 11 disposed on the other side of the main casing 10, the sprocket 2 is disposed in a receiving cavity formed by the main casing 10 and the side cover 11, the rear end of the chain plate 3 is also disposed in the receiving cavity, the saw chain 4 is enclosed on the sprocket 2 and the chain plate 3, the sprocket 2 is driven to rotate by a power source, and the sprocket 2 drives the saw chain 4 to perform a cutting action. Wherein the power source is arranged between the main housing 10 and the cover 12, the power source in this embodiment is an electric motor, i.e. the chain saw is an electric chain saw, it will be appreciated that other power chain saws, such as chain saws or hydraulic chain saws, etc. are also possible. The chain saw in this embodiment further includes a tension locking device, the tension locking device includes a push rod 5, a first elastic member 6, a second elastic member 7 and a self-locking stopper 8, the push rod 5 is connected with the link plate 3, the first elastic member 6 is connected between the housing 1 and the push rod 5, the first elastic member 6 is used for driving the push rod 5 to push the link plate 3 forward to tension the saw chain 4, the self-locking stopper 8 is connected with the push rod 5, the second elastic member 7 is connected between the self-locking stopper 8 and the housing 1, and the second elastic member 7 is matched with the self-locking stopper 8 to lock the position of the push rod 5.
Specifically, the first elastic member 6 is a spring, the first elastic member 6 is sleeved on the push rod 5, the side cover 11 is provided with a limiting plate 110, and it should be noted here that, in fig. 1, in order to facilitate checking the structure set on the side plate, the side plate is turned 180 degrees, so that the side provided with the limiting plate 110 faces upwards to facilitate checking, during actual assembly, the side provided with the limiting plate 110 faces towards the main casing 10, and the tensioning and locking device is also set between the side cover 11 and the main casing 10. The limiting plate 110 is close to the front end of the push rod 5, one end of the first elastic piece 6 is abutted against the limiting plate 110, the other end of the first elastic piece 6 is abutted against the front end of the push rod 5, and the front end of the push rod 5 is further provided with a limiting stop block 50 used for being connected with the first elastic piece 6. When the chain plate 3 and the saw chain 4 are installed and the tension degree is adjusted, the first elastic piece 6 is in a compressed state, so that when the tension degree is needed to be adjusted again, the elastic action of the first elastic piece 6 on the push rod 5 can enable the push rod 5 to push the chain plate 3 to move forward so as to tension the saw chain 4. It can be understood that the limiting plate 110 can also be arranged in front of the front end of the push rod 5, and two ends of the first elastic piece 6 are respectively connected with the limiting plate 110 and the push rod 5 in a hanging manner, so that when the chain plate 3 and the saw chain 4 are installed and the tension degree is adjusted, the first elastic piece 6 is in a stretching state, and the tensioning adjustment function can be realized. In this embodiment, a top post 51 is further disposed below the limit stop 50, the top post 51 extends into a gap between the link plate 3 and the sprocket 2, and the top post 51 is connected with the link plate 3, specifically in this embodiment, the top post 51 abuts against the link plate 3 to apply a pushing force to the link plate 3 when adjusting the tension, so that the occupied space can be reduced.
The self-locking stop block 8 is provided with a through hole for the push rod 5 to pass through, the self-locking stop block 8 is sleeved on the push rod 5, as shown in fig. 2, the self-locking stop block 8 forms an inclined locking angle alpha with the push rod 5 under the action of the elastic force of the second elastic piece 7, and the inclined locking angle alpha means that when the angle value between the self-locking stop block 8 and the push rod 5 is reached, the position of the push rod 5 can be locked by the friction force between the inner wall of the through hole and the surface of the push rod 5. In this embodiment, friction protrusions are further arranged on the inner wall of the through hole, friction force between the inner wall of the through hole and the push rod 5 is increased, and a better locking effect is obtained. When the push rod 5 is used for pushing the chain plate 3 to adjust the tension, a user only needs to overcome the elasticity of the second elastic piece 7 to the self-locking stop block 8 to separate the inner wall of the through hole from the surface of the push rod 5, and the operation is simple and convenient.
The second elastic member 7 in this embodiment is a spring, the second elastic member 7 is sleeved on the push rod 5, one end of the second elastic member 7 is abutted on the self-locking stop block 8, the other end of the second elastic member 7 is abutted on the limiting plate 110, the side cover 11 is provided with a limiting protrusion 113, one end of the self-locking stop block 8 is abutted on the limiting protrusion 113, and of course, the self-locking stop block 8 can also be connected on the side cover 11 through a pin shaft in a rotating manner. The spring force of the spring is utilized to drive the self-locking stop block 8 to rotate relative to the limit bulge 113, so that the self-locking stop block 8 inclines relative to the push rod 5 to form an inclination locking angle alpha. The second elastic piece 7 is directly connected to the self-locking stop block 8 of the through hole circumference, so that the second elastic piece 7 can be limited by the push rod 5, so that the radial deformation or displacement of the second elastic piece 7 can be limited, and the occupied space can be reduced. It will be appreciated that the second resilient member 7 may be in either a stretched or compressed state when in a state in which it locks the position of the push rod 5. It will be appreciated that in order to apply a force to the self-locking stop 8 to rotate the self-locking stop 8 relative to the push rod 5 to form the tilt lock angle α, it is necessary that the connection point of the second resilient member 7 to the self-locking stop 8 and the point of the self-locking stop 8 are offset from each other.
In this embodiment, a compression knob 114 is further disposed on the side cover 11, a bolt 100 is disposed on the main housing 10, a slotted hole 30 through which the bolt 100 passes is disposed on the link plate 3, the length direction of the slotted hole 30 is consistent with the length direction of the push rod 5, and the bolt 100 passes through the slotted hole 30 and is in threaded connection with the compression knob 114. The link plate 3 can thus be fixed by means of the press knob 114 after the link plate 3 and the saw chain 4 have been mounted.
The installation of the chain saw before use and the tension adjustment process after use provided in this embodiment are described as follows: with reference to fig. 3, before use, the chain plate 3 and the saw chain 4 need to be mounted, the self-locking stop block 8 is shifted to rotate against the elastic force of the second elastic piece 7, so that the through hole on the self-locking stop block 8 is separated from the push rod 5, the push rod 5 is pulled backwards, the front end is free for mounting the chain plate 3 and the saw chain 4, then the self-locking stop block 8 is loosened, and under the elastic force of the second elastic piece 7, the self-locking stop block 8 rotates relative to the push rod 5 to lock the push rod 5. The chain plate 3 is arranged on the main shell 10, the saw chain 4 is surrounded on the chain wheel 2 and the chain plate 3, and the self-locking stop block 8 is stirred again to separate the through hole from the push rod 5 as shown in the combination of fig. 4, so that the push rod 5 moves forwards under the action of the elastic force of the first elastic piece 6, the push rod 5 pushes the chain plate 3 to move forwards, the chain plate 3 stretches with the saw chain 4, then the self-locking stop block 8 is loosened, and under the action of the elastic force of the second elastic piece 7, the self-locking stop block 8 rotates relative to the push rod 5 to lock the push rod 5 again. Finally, the side cover 11 is covered on the main shell 10, the bolt 100 on the main shell 10 passes through the oblong hole 30 to align with the pressing knob 114 on the side cover 11, and the pressing knob 114 is screwed to fix the chain plate 3 with the machine shell 1. When the saw chain 4 is loosened due to abrasion and heating expansion after the chain saw works for a long time, the compression knob 114 can be unscrewed, the push rod 5 pushes the chain plate 3 to move forward under the elastic action of the first elastic piece 6, and therefore the chain plate 3 drives the saw chain 4 to be tensioned relative to the chain wheel 2, and the compression knob 114 is screwed. The user can operate the device conveniently without carrying an adjusting tool additionally.
According to the chain saw provided by the embodiment, after the tension of the saw chain 4 is adjusted in place, the position of the push rod 5 is locked through the second elastic piece 7 and the self-locking stop block 8, in the working process of the chain saw, even if the saw chain 4 receives a large instant impact force, the chain plate 3 cannot generate displacement under the action of the push rod 5 due to the fact that the position of the push rod 5 is locked, and therefore the saw chain 4 can keep the tension, the frequency of tensioning adjustment operation is effectively reduced, and the service life of the chain saw is prolonged.
Embodiment two: the difference between the present embodiment and the above embodiment is that the second elastic member 7 is not sleeved on the push rod 5 in the present embodiment, the self-locking stop block 8 is rotationally connected with the side cover 11 through the first pin shaft 111, one end of the second elastic member 7 is connected with the end of the self-locking stop block 8, and the distance between the connection point of the second elastic member 7 and the self-locking stop block 8 and the first pin shaft 111 is greater than the distance between the first pin shaft 111 and the through hole, as shown in fig. 5.
Based on the above-mentioned distinguishing technical features, according to the lever principle, the distance between the connection point of the second elastic member 7 and the self-locking stop block 8 and the first pin shaft 111 can be understood as a first force arm, the distance between the first pin shaft 111 and the through hole can be understood as a second force arm, the first force arm is designed to be larger than the second force arm, when the chain saw tension needs to be adjusted, an operator can toggle the self-locking stop block 8 with smaller force, and when the self-locking stop block 8 inclines relative to the push rod 5, under the condition that the elastic force of the first elastic member 6 is determined, the acting force of the inner wall of the through hole on the push rod 5 is larger, the generated friction force is also larger, and the locking effect is better.
Embodiment III: the present embodiment also provides a chain saw, as shown in fig. 6, which is different from the first embodiment or the second embodiment in that the second elastic member 7 is a torsion spring, one end of the self-locking stop block 8 is rotatably connected to the casing 1 through the second pin shaft 112, the torsion spring is sleeved on the second pin shaft 112, one end of the torsion spring is connected with the self-locking stop block 8, and the other end of the torsion spring is connected with the second pin shaft 112.
Based on the above-mentioned distinguishing technical features, in this embodiment, the torsion generated by the torsion spring drives the self-locking stop block 8 to rotate relative to the casing 1, so that the self-locking stop block 8 tilts relative to the push rod 5 to form a tilt locking angle α. The other end of the self-locking stop block 8 is shifted to overcome the torsion of the second elastic piece 7 to separate the through hole from the push rod 5, and after the self-locking stop block 8 is released, the self-locking stop block 8 and the push rod 5 form an inclined self-locking angle alpha under the torsion action of the second elastic piece 7.
It will be appreciated that the above-mentioned three embodiments of the connection of the second resilient member 7 to the self-locking stop 8 may be used alone, in any combination, or in any combination.
The above embodiments are merely examples of the present invention, but the technical features of the present invention are not limited thereto, and any changes or modifications made by those skilled in the art within the scope of the present invention are included in the scope of the present invention.
Claims (8)
1. A chain saw comprising a housing, a chain plate and a saw chain, characterized in that: the chain plate is connected with the push rod, the first elastic piece is connected between the push rod and the shell, and the first elastic piece is used for driving the push rod to push the chain plate to move forwards;
the self-locking stop block is connected with the push rod, the second elastic piece is connected between the self-locking stop block and the shell, and the second elastic piece is matched with the self-locking stop block to lock the push rod;
the self-locking stop block is provided with a through hole for the push rod to pass through, the self-locking stop block is sleeved on the push rod, and an inclined locking angle is formed between the self-locking stop block and the push rod under the action of the elastic force of the second elastic piece;
the chain wheel is arranged in the shell, a gap is reserved between the chain wheel and the chain plate, a jacking column extending into the gap is arranged on the push rod, and the jacking column is connected with the chain plate and used for pushing the chain plate to move forward.
2. A chain saw as in claim 1 wherein: the second elastic piece is a spring, one end of the second elastic piece is connected with the self-locking stop block, the other end of the second elastic piece is connected with the shell, the self-locking stop block is rotationally connected with the shell, and the connection point of the second elastic piece and the self-locking stop block and the turning point of the self-locking stop block are staggered with each other.
3. A chain saw as in claim 2 wherein: the second elastic piece is sleeved on the push rod.
4. A chain saw as in claim 2 wherein: the self-locking stop block is rotationally connected with the casing through a first pin shaft, one end of the second elastic piece is connected with the end part of the self-locking stop block, and the distance between the connecting point of the second elastic piece and the self-locking stop block and the first pin shaft is larger than the distance between the first pin shaft and the through hole.
5. A chain saw as in claim 1 wherein: the second elastic piece is a torsion spring, the self-locking stop block is rotationally connected to the machine shell through a second pin shaft, the second elastic piece is sleeved on the second pin shaft, one end of the second elastic piece is connected with the self-locking stop block, and the other end of the second elastic piece is connected with the second pin shaft.
6. A chain saw as in claim 1 wherein: friction protrusions are arranged on the inner walls of the through holes.
7. A chain saw as in any one of claims 1-6 wherein: the casing is provided with a limiting plate for the push rod to pass through, the push rod is provided with a limiting stop, the first elastic piece is a spring, the first elastic piece is sleeved on the push rod, one end of the first elastic piece is connected to the limiting plate, and the other end of the first elastic piece is connected to the limiting stop.
8. A chain saw as in claim 1 wherein: the machine shell is provided with a compression knob and a bolt, the chain plate is provided with a slotted hole for the bolt to pass through, the length direction of the slotted hole is consistent with the length direction of the chain plate, and the bolt passes through the slotted hole and is in threaded connection with the compression knob.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392424.7A CN113146750B (en) | 2021-04-13 | 2021-04-13 | Chain saw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110392424.7A CN113146750B (en) | 2021-04-13 | 2021-04-13 | Chain saw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113146750A CN113146750A (en) | 2021-07-23 |
| CN113146750B true CN113146750B (en) | 2023-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110392424.7A Active CN113146750B (en) | 2021-04-13 | 2021-04-13 | Chain saw |
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| CN (1) | CN113146750B (en) |
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| CN1724202A (en) * | 2004-07-21 | 2006-01-25 | 伊莱克斯家用产品有限公司 | Bar knob with cam-operated locking mechanism |
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| CN102441920A (en) * | 2010-10-01 | 2012-05-09 | 苏州宝时得电动工具有限公司 | Chain saw |
| JP2014097598A (en) * | 2012-11-14 | 2014-05-29 | Hitachi Koki Co Ltd | Chain saw |
| DE202015004337U1 (en) * | 2015-06-18 | 2015-10-05 | Jenn Feng New Energy Co., Ltd. | Chainsaw with chain tension adjustment mechanism |
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| CN208391155U (en) * | 2018-06-20 | 2019-01-18 | 王建楷 | A kind of adjusting panel assembly |
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| CN113146750A (en) | 2021-07-23 |
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Address after: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Applicant after: Zhejiang Yate Electric Appliance Co.,Ltd. Address before: No. 150 Wenlong Road, Yuxin Town, Nanhu District, Jiaxing City, Zhejiang Province Applicant before: ZHEJIANG YAT ELECTRICAL APPLIANCE Co.,Ltd. |
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