CN218311222U - Chain saw with brake structure - Google Patents

Abstract

The utility model discloses a chain saw with brake structure, which comprises a housing, be equipped with motor, gear box, brake subassembly, switch and chain saw subassembly in the casing, the casing rear end is equipped with switch trigger subassembly, be equipped with the brake switch subassembly on the casing, the brake switch subassembly is including the brake trigger that can control the translation at the casing, it even has the brake connecting rod that is located the switch top to rotate on the brake trigger, the brake connecting rod is connected with the brake subassembly. In this way, the utility model discloses chain saw with brake structure can normally close the chain saw and brake the chain saw through switch trigger subassembly under the chain saw starting condition, can also shut down through the brake trigger and close and brake the chain saw, and the double switch structure uses safe and reliable.

Description

Chain saw with brake structure

Technical Field

The utility model relates to a chain saw field especially relates to a chain saw with brake structure.

Background

The electric chain saw is a very common electric tool, and the safety of use is very important because the saw teeth of the electric chain saw are exposed and have higher rotating speed. Since the chain saw blade of the electric chain saw may be recoiled toward the operator due to an accidental collision during use of the electric chain saw, which may cause danger to the operator, a brake device is generally installed in the electric chain saw.

The existing brake mechanism of the electric chain saw has the disadvantages of complex structure, complex production and assembly and high cost, and generally only a switch button is stopped/started to brake/release a power structure of the electric chain saw and open/close a circuit of the electric chain saw, so that protective measures are lacked.

Disclosure of Invention

The utility model discloses the main technical problem who solves provides a chain saw with brake structure, can normally close the chain saw and brake the chain saw through switch trigger subassembly under the chain saw starting condition, can also shut down through the brake trigger and close and brake the chain saw, and the dual switch structure uses safe and reliable.

In order to solve the technical problem, the utility model discloses a technical scheme be: the chain saw with the brake structure comprises a shell, wherein a motor, a gear box, a brake assembly, a switch and a chain saw assembly are arranged in the shell, a switch trigger assembly is arranged at the rear end of the shell, the brake switch assembly is arranged on the shell and comprises a brake trigger capable of translating left and right on the shell, a brake connecting rod positioned above the switch is rotatably connected to the brake trigger and connected with the brake assembly, the brake connecting rod is provided with a first position contacted with the switch trigger assembly, and the switch trigger assembly presses or releases the brake connecting rod under the first position, so that the brake connecting rod presses or releases the switch and the brake assembly, and the switch is opened, the brake assembly is unlocked, or the switch is closed and the brake assembly brakes; the brake trigger drives the translation of brake connecting rod and makes the brake connecting rod be located the second position with switch trigger subassembly separation, under the second position, the brake connecting rod separates and loosens brake subassembly with the switch to make the brake subassembly braking and the switch be in the closed condition that can't open.

The utility model discloses a preferred embodiment, the brake subassembly is including rotating the connecting plate of connection on the gear box, the right-hand member of connecting plate passes through the spring and is connected with the gear box, the left end of connecting plate has the spout, the left end below of connecting plate is connected with the brake steel band, the spliced pole swing joint of the left end of brake connecting rod is in the spout, under the first position, the spliced pole pushes down or loosens the connecting plate and makes the connecting plate rotate reciprocally to make the brake steel band be in unblock state or brake state, under the second position, the relative spout of spliced pole moves to the right, makes the connecting plate rotate to the right, thereby makes the brake steel band be in brake state.

In a preferred embodiment of the present invention, the connecting column is located on the left side of the sliding groove in the first position, and the connecting column is located on the right side of the sliding groove in the second position.

The utility model discloses a preferred embodiment, have the brake disc that links firmly with the transmission shaft in the gear box, the pot head is established in the brake disc outside under the brake steel band, and the upper end is connected on the connecting plate, thereby the connecting plate rotates and makes brake steel band and brake disc contact or separation make brake assembly be in brake state or unblock state.

In a preferred embodiment of the present invention, a plurality of grooves are evenly formed in the gear box along the circumferential direction, a spacer block is fixedly arranged in each groove, the spacer block is located outside the lower end of the brake steel belt, and the outside of the spacer block protrudes radially inward to block the contact between the brake steel belt and the inner wall of the gear box.

In a preferred embodiment of the present invention, the right end of the brake link is rotatably connected to the brake trigger, and the left end has a contact push surface, the switch trigger assembly is pressed down to contact the push surface, so that the switch trigger assembly rotates around the brake trigger to the right end of the brake link, and the switch trigger assembly releases the contact push surface, thereby releasing the brake link.

In a preferred embodiment of the present invention, the switch assembly includes a switch assembly rotatably connected to the housing, the right end of the switch assembly is connected to the contact block through a transmission shaft, the contact block is rotatably connected to the housing and the gear box, the contact block is in contact with the contact push surface at a first position and presses the contact push surface to apply pressure to the brake link, the contact block releases the contact push surface to release the brake link, and the contact block is separated from the contact push surface at a second position to release the brake link.

In a preferred embodiment of the present invention, the brake link is disposed in parallel with the connecting plate, and the connecting plate is located in front of the brake link.

In a preferred embodiment of the present invention, the mounting groove is formed at the right end of the housing, and the lower end of the brake trigger is movably connected in the mounting groove and slides horizontally along the mounting groove, and extends into the housing to be connected to the brake link.

The beneficial effects of the utility model are that: the utility model discloses chain saw with brake structure, brake connecting rod and switch separation under the chain saw normal closed condition to brake assembly is in brake state, presses switch trigger subassembly and opens switch and release brake assembly through the brake connecting rod, and the chain saw can normally be started, and the brake connecting rod plays the dual function of opening the switch and releasing the brake, simplifies the switch structure.

The utility model discloses chain saw with brake structure under the chain saw normal operating condition, can be through translation brake trigger, brake connecting rod synchronous movement and switch separation, brake the chain saw through the brake subassembly in the time of closing the switch to realize emergency shutdown and braking.

The utility model discloses chain saw with brake structure under emergency braking state, because brake connecting rod and switch trigger subassembly separate, press the switch trigger subassembly this moment and be unable start-up chain saw, effectively avoid emergency braking after the mistake touch switch trigger subassembly and arouse the mistake start-up, guarantee safe in utilization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

FIG. 1 is a schematic view of a preferred embodiment of a chain saw with a brake configuration according to the present invention;

FIG. 2 is a schematic view of the internal structure of FIG. 1;

FIG. 3 is a schematic view of a chain saw having a brake configuration in a first position in a power-off state;

FIG. 4 is a rear view of FIG. 3;

FIG. 5 is a schematic view of a chain saw having a brake configuration being turned on in a first position;

FIG. 6 is a rear view of FIG. 5;

FIG. 7 is a schematic view of the chain saw in a second position with a brake configuration;

FIG. 8 is a rear view of FIG. 7;

FIG. 9 is a partial schematic view of the perspective structure of FIG. 7;

FIG. 10 is a partial schematic view of FIG. 2;

FIG. 11 is a perspective view of the brake link;

FIG. 12 is a schematic partial exploded view of the gearbox;

FIG. 13 is a schematic partial exploded view of the gearbox;

the parts in the drawings are numbered as follows: 1. the brake device comprises a machine shell, 11, a mounting groove, 2, a motor, 3, a gear box, 31, a brake disc, 32, an isolation block, 4, a chain saw assembly, 5, a brake assembly, 51, a connecting plate, 511, a sliding groove, 52, a spring, 51, a brake steel belt, 6, a switch, 7, a brake switch assembly, 71, a brake trigger, 72, a brake connecting rod, 721, a contact push surface, 722, a connecting column, 8, a switch trigger assembly, 81, a switch trigger, 82, a transmission shaft, 83 and a contact block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below. The structure, proportion, size and so on shown in the drawings of the present specification are only used to cooperate with the content disclosed in the specification for the understanding and reading of the people skilled in the art, and are not used to limit the limit conditions of the present invention, so that the present invention does not have the essential significance in the technology, and any structure modification, proportion relation change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and the achievable by the present invention. In addition, the terms "upper", "lower", "left", "right" and "middle" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Referring to fig. 1 to 13, a chain saw with a brake structure includes a housing 1, and a motor 2, a gear box 3, a chain saw assembly 4, a brake assembly 5 and a switch 6 are disposed in the housing 1. The brake assembly 5 and the switch 6 can be connected to the gear box 3 or the housing 1, or can be connected by assembling other connecting pieces. The switch is used as a master control switch and is responsible for electrifying the motor 2, and the switch 6 is connected with the motor 2 and the electric connection structure part of the power supply according to the conventional connection mode in the field, and the details are not described herein. The motor 2 drives the chain saw assembly 4 to move through the gear box 3 and is powered by a battery pack, and the arrangement of the motor 2, the gear box 3 and the chain saw assembly 4 adopts a conventional structure.

The shell 1 is provided with a brake switch component 7. The brake switch assembly 7 includes a brake trigger 71 that can translate left and right within the housing 1, and a brake link 72 is pivotally connected to the brake trigger 71 above the switch 6. The brake link 72 is disposed parallel to the connection plate 51, and the connection plate 51 is located in front of the brake link 72. The right end of the machine shell 1 is provided with a mounting groove 11, and the lower end of the brake trigger 71 is movably connected in the mounting groove 11 and slides left and right along the mounting groove 11 and extends into the machine shell 1 to be connected with the brake connecting rod 72. The brake link 72 has a right end rotatably connected to the brake trigger 71 and a left end having a contact push surface 721. The contact pushing surface 721 functions to push the contact pushing surface 721 through the contact block 83 to move the brake link 72 when the brake link 72 is in contact with the contact block 83. The right end of the brake link 72 is rotatably connected to the trigger so that the brake link 72 has a rotational angle. The brake trigger 71 can move horizontally on the housing 1, and the brake trigger 71 moves horizontally to the right to drive the brake link 72 to move synchronously, so that the contact pushing surface 721 is separated from the contact block 83, and the switch trigger assembly 8 does not have a switch function. Conversely, when the brake trigger moves to the left and the contact block 83 contacts the contact pushing surface 721, the switch trigger assembly 8 functions as a switch.

The brake assembly 5 includes an attachment plate 51 rotatably connected to the gear housing 3. The right end of the connecting plate 51 is connected to the gear case 3 via a spring 52, and the left end of the connecting plate 51 has a slide slot 511. A brake steel band 53 is connected below the left end of the connecting plate 51. The connecting post 722 at the left end of the brake link 72 is movably connected in the sliding slot 511. The spring 52 is always in a stretching state, and a pulling force is constantly provided to the right end of the connecting plate 51, so that the connecting plate 51 can deflect rightwards without external force, that is, the sliding groove 511 of the connecting plate 51 is in a pressure state without the connecting column 722, and the brake steel belt 53 is in a braking state. After the brake connecting rod 72 moves, the force is transmitted to the connecting plate 51 through the connecting column 722, the brake connecting rod 72 rotates downwards, the connecting column 722 synchronously drives the connecting plate 51 to rotate downwards, the brake steel belt 53 loosens the brake disc, and the brake assembly 5 is in an unlocking state.

The rear end of the machine shell 1 is provided with a switch trigger assembly 8. The switch trigger assembly 8 includes a switch trigger 81 pivotally connected to the housing 1. The right end of the switch trigger 81 is connected to a contact block 83 via a transmission shaft 82. The contact block 83 is rotatably connected to the housing 1 and the gear case 3。When the switch trigger 81 is pressed, the switch trigger 81 rotates upward, and the transmission shaft 82 is driven to push the contact block 83 to rotate downward. In the initial state, when the switch trigger 81 is pressed down, the brake connecting rod 72 is pressed down through the contact block 83, the brake connecting rod 72 is forced to rotate, when the brake connecting rod 72 is contacted with the switch 6 below, the connecting plate 51 moves downwards along with the brake connecting rod 72 synchronously, the brake steel belt 53 releases a brake disc of the gear box 3, the gear box 3 is unlocked, and at the moment, the chain saw is electrified and starts to start, namely, the normal starting state.

As shown in fig. 12 and 13, a brake disc 31 fixedly connected with a transmission shaft 82 is arranged in the gear box 3, the lower end of the brake steel belt 53 is sleeved outside the brake disc, and the upper end is connected to the connecting plate 51. The connecting plate 51 is rotated to bring the brake steel band 53 into contact with or away from the brake disc to place the brake assembly 5 in a braking state or an unlocked state. When the brake steel belt 53 is separated from the brake disc, the gear box 3 can normally output power to the chain saw assembly 4, and when the connecting plate 51 is lifted upwards and rotated, the brake steel belt 53 is lifted upwards synchronously, and the lower end of the brake steel belt 53 holds the brake disc tightly, so that the gear box 3 is braked.

A plurality of grooves are evenly formed in the gear box 3 along the circumferential direction, and isolating blocks 32 are fixedly arranged in the grooves. The spacers are located outside the lower ends of the brake steel bands 53, and the outside of the spacers 32 is protruded radially inward to block the brake steel bands 53 from contacting the inner wall of the gear case 3. In the unlocked state of the brake assembly 5, the brake steel band 53 is spaced from the inner wall of the gear housing 3, and the brake steel band 53 moves upward in the braking state. Since a great amount of heat is generated due to friction when the brake band 53 is locked to the brake disc, in order to prevent the heat generated by the brake band 53 and the brake disc after moving upward from being transferred to the gear box 3, the separation of the brake band 53 and the inner wall of the gear box 3 is achieved by the spacer 32. Meanwhile, a ventilation notch can be formed in the surface of the gear box 3 to realize internal heat dissipation.

When the chain saw is in the initial state, i.e., the brake trigger 71 is at the leftmost side, and the switch trigger 81 is not pressed, the contact push surface 721 of the brake link 72 comes into contact with the contact block 83, and the initial state is the first position where the left end of the brake link 72 is located just above the switch 6.

In the first position, as shown in fig. 3 and 4, the switch trigger 81 is depressed and the brake link 72 is pivoted downwardly by the contact block 83. At this point, the brake link 72 contacts the switch 6 and the switch 6 is opened and the chain saw is started. At this time, the connecting column 722 is located on the left side of the sliding groove 511, the brake connecting rod 72 presses the sliding groove 511 downwards through the connecting column 722, so that the connecting plate 51 is driven by the brake connecting rod 72 to synchronously move downwards, the brake steel belt 53 is separated from the brake disc, the brake disc is in an unlocking state, the gear box 3 can normally operate, and at this time, the motor drives the chain saw to normally operate through the gear box 3. As shown in fig. 5 and 6, the other way round, the switch trigger 81 is released, the contact face loses the pressure of the contact block 83, the connecting plate 51 is pulled to reset under the action of the spring 52, the connecting plate 51 synchronously pushes the brake connecting rod 72 to reset in the opposite direction, the switch 6 is switched off, and the brake disc is locked again.

As shown in fig. 7 to 9, if the chain saw is operated normally and an emergency braking is required, the brake trigger 71 is pushed to move to the right, the brake link 72 moves to the right synchronously, and the brake link 72 moves to the right to separate the contact pushing surface 721 from the contact block 83, which is the second position, and the connecting column 722 is located at the right side of the sliding slot 511. In this state, since the contact pushing surface 721 is separated from the contact block 83, the contact block 83 no longer provides pressure to the contact pushing surface 721, the connecting plate 51 is pulled to reset under the action of the spring 52, and the connecting plate 51 synchronously pushes the brake link to rotate and reset in the opposite direction. Meanwhile, since the brake link 72 is moved by the brake trigger 71, the brake link 72 is vertically offset from the switch 6. Thus, in the second position, the brake link 72 does not overlap the switch 6 in the lateral and longitudinal directions, the switch 6 is turned off, the brake assembly 5 is braked again, and the chain saw is scram and braked until it is completely stopped. In the second state, in which the switch 6 is no longer turned on regardless of how the switch trigger 81 is pressed, the chain saw is not started by mistake, because the brake link 72 is separated from the switch 6 and the contact block 83, and the chain saw is again brought into the openable state after releasing the switch trigger 81 and moving the brake trigger 71 to the left to return to the first position. Thus, the second position corresponds to a forced closed state of the chainsaw, and any operation cannot open the chainsaw. Furthermore, even if the switch 6 fails, emergency braking can still be performed through the brake component 5, so that the personal safety of an operator is improved, the time for the operator to take down the battery is given, and the use safety of the operator is effectively ensured.

The brake trigger translates the brake link 72 to a second position in which the brake link 72 is disengaged from the switch trigger assembly 8 and the brake link 72 is disengaged from the switch 6 to release the brake assembly 5, thereby causing the brake assembly 5 to brake and the switch 6 to be in an off condition in which it cannot be opened.

Be different from prior art, the utility model discloses chain saw with brake structure can normally close the chain saw and brake the chain saw through switch trigger subassembly under the chain saw starting condition, can also shut down through the brake trigger and close and brake the chain saw, and the dual switch structure uses safe and reliable.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art should understand that without departing from the spirit of the present invention, the person skilled in the art should not inventively design the similar structural modes and embodiments to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (9)

1. A chain saw with a brake structure comprises a machine shell, wherein a motor, a gear box, a brake assembly, a switch and a chain saw assembly are arranged in the machine shell, and a switch trigger assembly is arranged at the rear end of the machine shell; the brake trigger drives the translation of brake connecting rod and makes the brake connecting rod be located the second position with switch trigger subassembly separation, under the second position, the brake connecting rod separates and loosens brake subassembly with the switch to make the brake subassembly braking and the switch be in the closed condition that can't open.

2. The chain saw with the brake structure as recited in claim 1, wherein the brake assembly comprises a connecting plate rotatably connected to the gear box, a right end of the connecting plate is connected to the gear box through a spring, a left end of the connecting plate has a slide slot, a brake steel band is connected to a lower portion of the left end of the connecting plate, a connecting column at a left end of the brake connecting rod is movably connected to the slide slot, the connecting column is pressed or released to rotate the connecting plate back and forth in the first position, so that the brake steel band is in an unlocked state or a braking state, and the connecting column is moved to the right relative to the slide slot in the second position, so that the connecting plate is rotated to the right, so that the brake steel band is in a braking state.

3. The chain saw with a brake structure as recited in claim 2, wherein the attachment post is located on a left side of the slide slot in the first position, and wherein the attachment post is located on a right side of the slide slot in the second position.

4. The chain saw with a brake structure as recited in claim 3, wherein the gear box has a brake disc fixed to the transmission shaft, the brake steel band is sleeved on the outside of the brake disc at a lower end thereof and connected to the connecting plate at an upper end thereof, and the connecting plate rotates to contact or separate the brake steel band with or from the brake disc so as to place the brake assembly in a braking state or an unlocking state.

5. The chain saw with the brake structure as recited in claim 4, wherein a plurality of grooves are uniformly formed in the gear housing along a circumferential direction, the grooves are fixedly provided with the spacers, the spacers are located outside a lower end of the brake steel band, and an outer side of the spacers is protruded radially inward to block the brake steel band from contacting an inner wall of the gear housing.

6. The chain saw with a brake structure as recited in claim 5, wherein the brake link has a right end rotatably connected to the brake trigger and a left end having a contact push surface, the switch trigger assembly presses the contact push surface downward to rotate the brake link right end around the brake trigger, and the switch trigger assembly releases the contact push surface to release the brake link.

7. The chain saw having a brake structure as recited in any one of claims 2 to 6, wherein the switch trigger assembly includes a switch trigger rotatably coupled to the housing, a right end of the switch trigger being coupled to a contact block through a transmission shaft, the contact block being rotatably coupled to the housing and the gear case, the contact block being in contact with the contact push surface in the first position and pressing down the contact push surface to press the brake link, the contact block releasing the contact push surface to release the brake link, and the contact block being separated from the contact push surface in the second position to release the brake link.

8. The chain saw having a brake structure of claim 7, wherein the brake link is disposed in parallel with a connecting plate, and the connecting plate is located in front of the brake link.

9. The chain saw with the brake structure as claimed in claim 1, wherein a mounting groove is formed at a right end of the housing, and a lower end of the brake trigger is movably coupled in the mounting groove, slides left and right along the mounting groove, and extends into the housing to be coupled to the brake link.

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