TWI726457B - Gas shut-off device with limited time - Google Patents

Abstract

A gas time limit closing device, comprising a knob, the knob is detachably installed with a shaft fixing seat, the shaft fixing seat is more than two groups, and one of them is installed on the knob, and the shaft fixing seat is provided for inserting and rotating the knob For the shaft hole of the shaft, the diameter of the shaft hole of each group of shaft fixing seats is different; the knob is installed with different shaft fixing seats to change the shaft diameter of the rotating shaft suitable for inserting the knob. In the present invention, multiple sets of shaft fixing seats with different shaft diameters of shaft holes are provided, and the knob is installed with different shaft fixing seats to change the shaft diameter of the rotating shaft suitable for inserting the knob. Since the shaft fixing seat only has one shaft hole, Therefore, the volume and the overall volume of the knob can be effectively reduced, and the use of materials can be effectively reduced. In addition, the shaft diameter of the shaft hole of the shaft fixing seat can be changed more, and the shape of the shaft hole can even be changed. The scope is wider.

Description

Gas shut-off device with limited time

The invention relates to a gas shut-off device with a time limit.

Chinese Patent Document No. CN208596317U discloses a general-purpose knob and an automatic gas shut-off machine using it. It includes a rotary body, a plurality of engaging parts are formed on the outer side of the housing, and a selective sleeve displacement member is provided on the inner top. Trigger parts with inductive switches; a terminal wheel is set to pass through the automatic closing body that engages the rotating body, and a circuit board and its electrically connected inductive switches, small motors, driving components, batteries, etc., are installed, and the driving components The drive shaft of the drive shaft passes through the push wheel and the intermediate wheel. When the small motor is started, the push wheel engages and drives the intermediate wheel to drive the terminal wheel, which can then drive the rotating body back to the closed position. When the small motor is not started, the mediator The wheel is not engaged and driven by the pushing wheel, but is in a separated idling state, and the rotating body is manually rotated to adjust the size of the furnace or switch the gas.

It can adapt to the assembly of rotating shafts with different shaft diameters by arranging selective sleeve hole displacement parts on the knob. Two shaft holes are set on the selective sleeve displacement component, resulting in a larger overall volume and a lot of waste of materials. Moreover, since the size of the shaft hole has been determined, it cannot be adapted to the assembly of rotating shafts with other shaft diameters or other special-shaped shafts. Diameter of the rotating shaft assembly.

In addition, since the selective sleeve hole displacement member is displaced in the length direction to change the position of the large and small shaft holes, when the selective sleeve hole displacement member and the knob are tightly assembled, the displacement operation is difficult and the displacement is prone to be out of place, resulting in There is a problem of poor concentricity between the knob and the rotating shaft. If the selective sleeve displacement part and the knob are loosely assembled, it is easy to cause the phenomenon of looseness with the knob.

The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a gas time-limited closing device, which can reduce the volume of the knob, reduce the use of materials, and has a wider application range.

In order to achieve the purpose of the present invention, the gas time-limited closing device of the present invention includes a knob, the knob is detachably installed with a shaft fixing seat, the shaft fixing seat is two or more groups, and one of them is installed on the knob, and the shaft fixing seat A shaft hole for inserting the rotary shaft into the knob is provided, and the diameter of the shaft hole of each group of shaft fixing seats is different; the knob is installed with different shaft fixing seats to change the shaft diameter of the rotary shaft suitable for inserting the knob.

After the shaft fixing seat and the knob are installed, the rotation centers of the knob and the shaft hole overlap.

The front of the knob forms a gripping portion, and the back is recessed with a cavity for installing the shaft fixing seat.

The side surface is provided with a time-limiting trigger part.

The knob is provided with a card slot for inserting the shaft fixing seat, and the card slot is provided with an elastic buckle part for buckling the shaft fixing seat for fixing.

The gas time limit shutoff device also includes a main engine. The main engine is provided with a motor and a rotating ring. The knob is installed in the middle of the rotating ring. The outer ring of the rotating ring is provided with a ring gear. The motor (such as a motor) is driven by the ring gear. connection.

The host is provided with an electric control board and a time-limited trigger switch, the electric control board is electrically connected with the time-limited trigger switch and a motor (such as a motor), and the time-limited trigger switch is provided with a contact foot that abuts against the side of the knob; When the knob rotates in the opposite direction, the contact foot is touched, and the trigger switch feedbacks a signal to the electric control board for a limited time, so that the electric control board drives the motor to rotate in the positive direction, thereby driving the ring gear and the knob to rotate in the positive direction until the knob touches the contact foot again, and the time limit is triggered The switch feeds back a signal to the electric control board again to stop the electric control board driving motor.

The transmission shaft of the motor (such as the motor) is provided with a first bevel gear, and the first bevel gear is drivingly connected with the ring gear through the second bevel gear.

The first bevel gear is provided with a first helical gear on the outer conical surface, a second helical gear is provided on the inner conical surface of the second bevel gear, and a third helical gear is provided on the outer conical surface. The gear meshes with the ring gear for transmission. The first bevel gear can be inserted into the second bevel gear or removed from the second bevel gear through the elastic device; the motor rotates in the positive direction, and under the tension of the elastic device, The first helical gear is relatively screwed into the second helical gear, so that the first bevel gear is screwed into the second bevel gear, the first helical gear and the second helical gear are meshed for transmission, thereby driving the second bevel gear, ring gear, The knob rotates in the positive direction, and the knob rotates in the opposite direction, driving the ring gear and the second bevel gear to rotate in the opposite direction. The first helical gear rotates out of the second helical gear relatively, so that the first bevel gear moves from the second bevel gear. The shaped gear comes out and compresses the elastic device.

The elastic device is a spring that abuts between the first helical gear and the motor.

The beneficial effects of the present invention are:

By setting multiple sets of shaft fixing seats with different shaft diameters of shaft holes, the knobs can be installed with different shaft fixing seats to change the shaft diameter of the rotating shaft that can be inserted into the knob. Since the shaft fixing seat only has one shaft hole, it can be Effectively reduce its volume and the overall volume of the knob, and also effectively reduce the use of materials. In addition, the shaft diameter of the shaft hole of the shaft fixing seat can have more changes, and even the shape of the shaft hole can be changed, and the applicable range is more wide.

The present invention will be further described below in conjunction with the drawings and embodiments.

Referring to Figures 1 to 3, the gas time limit closing device of the present invention includes a knob 1. The front of the knob 1 forms a gripping portion 12 for the user to hold the knob 1, and the back is recessed with a cavity for mounting the shaft fixing seat 2 The body 13 and the shaft fixing seat 2 are hidden in the cavity 13 to make the knob 1 more beautiful. The side is provided with a time-limiting trigger part 14, which can interact with the time-limited trigger switch 42 described below to realize the time-limited closing function. Technology in the field Everyone can understand.

Among them, the knob 1 is detachably installed with a shaft fixing seat 2. The shaft fixing seats 2 are two or more groups, and one of them is installed on the knob 1 (as shown in Figures 1 and 2), and the shaft fixing seat 2 A shaft hole 21 for inserting the rotary shaft 11 into the knob 1 is provided, and the diameter of the shaft hole 21 of each group of shaft fixing seats 2 is different; the knob 1 can be adapted to be inserted into the rotation of the knob 1 by installing different shaft fixing seats 2 The size of the shaft diameter of the shaft 11.

Since only one shaft hole 21 is provided on each group of shaft fixing seat 2, its volume and the overall volume of the knob 1 can be effectively reduced, and the use of materials can also be effectively reduced. In addition, the shaft diameter of the shaft hole 21 of the shaft fixing seat 2 The size can have more changes, and even the shape of the shaft hole 21 can be changed, and the applicable range is wider, especially suitable for the use of the non-standard rotating shaft 11, which can be understood by those skilled in the art. Moreover, by replacing the mold core used to form the shaft hole 21 on the mold for producing the shaft fixing seat 2, different shaft fixing seats 2 can be produced, which effectively improves the versatility of the mold and reduces the cost of the mold. Understandable.

Further, after the shaft fixing base 2 and the knob 1 are installed, the rotation centers of the knob 1 and the shaft hole 21 overlap. Since the knob 1 is only fixed to a set of shaft fixing bases 2, the rotation of the knob 1 and the shaft hole 21 can be ensured. Concentricity.

Further, the knob 1 is provided with a card slot 15 for inserting the shaft fixing seat 2 and the card slot 15 is provided with an elastic buckle part 151 for buckling the shaft fixing seat 2 for fixing. In actual use, the knob and The shaft fixing base 2 is a one-time assembly (only disassembled during maintenance or replacement), so the shaft fixing base 2 can be inserted tightly into the slot 15 and further fixed by the elastic buckle 151 to prevent the two from loosening.

Further, the gas time limit shut-off device further includes a host 3 in which a motor 31 (such as a motor) and a rotating ring 32 are provided. The knob 1 is installed in the middle of the rotating ring 32, and the outer ring of the rotating ring 32 A ring gear 321 is provided, and a motor 31 (such as a motor) is drivingly connected to the ring gear 321 to realize the function of shutting off the gas in a limited time, which can be understood by those skilled in the art.

Further, the host 3 is provided with an electric control board 4 and a time-limited trigger switch 42. The electronic control board 4 is electrically connected to the time-limited trigger switch 42 and the motor 31. The time-limited trigger switch 42 is provided with a side part of the knob 1. The contact foot 421 that abuts, specifically, the contact foot 421 and the time-limiting trigger portion 14 abut against each other, the time-limiting trigger portion 14 of this embodiment is a groove structure, and the contact foot 421 elastically pushes into the time-limiting trigger portion 14; When the gas is turned off for a limited time, hold the grip 12 with your hand and turn the knob 1 in the opposite direction (set the counterclockwise rotation as the opposite direction). At this time, the knob 1 touches the contact pin 421, and the trigger switch 42 returns a signal to the electric control board 4 at the time limit. After receiving the feedback signal, the electronic control board 4 will drive the motor 31 (delayed drive can be used to prevent the motor 31 from starting immediately when the user's hand rotates the knob 1) to rotate in the positive direction (set the motor to rotate clockwise to be positive) Direction), so as to drive the ring gear 321 and the knob 1 to rotate in the positive direction until the time limit trigger 14 of the knob 1 touches the contact foot 421 again, and the time limit trigger switch 42 again feeds back a signal to the electric control board 4 to drive the electric control board 4 The motor 31 is shut down, and at the same time, the gas shut-off device shuts down the gas delivery within a time limit, which can be understood by those skilled in the art. By rotating the knob 1, the distances of the contact pins 421 away from the time-determined trigger switch 42 are different, so that the time-determined length is different, which can be understood by those skilled in the art. In addition, a receiving device 41 can also be provided on the electronic control board 4 to enable it to receive external signals, and realize the emergency shutdown of the gas time-limited shutdown device through remote control. For example, when the receiving device 41 receives the emergency shutdown signal, the electronic control board 4 quickly The driving motor 31 rotates in the positive direction until the time-limiting trigger portion 14 of the knob 1 touches the contact foot 421 again, and the time-limiting trigger switch 42 feeds back a signal to the electric control board 4 again, so that the electric control board 4 drives the motor 31 to stop. Those skilled in the art All understandable.

Further, the transmission shaft of the motor 31 is provided with a first bevel gear 33, and the first bevel gear 33 is drivingly connected to the ring gear 321 through the second bevel gear 34.

Further, a first helical gear 331 is provided on the outer conical surface of the first bevel gear 33, a second helical gear 341 is provided on the inner conical surface of the second bevel gear 34, and a first helical gear 341 is provided on the outer conical surface. The three helical gears 342, the third helical gears 342 mesh with the ring gears 321 for transmission, the first bevel gear 33 can be inserted into the second bevel gear 34 or detached from the second bevel gear 34 through an elastic device. The first bevel gear 33 is linearly movable on the rotation shaft of the motor 31, and the first bevel gear 33 can be driven by the rotation shaft of the motor 31; when the time limit starts, the motor 31 rotates in the positive direction (setting the motor 31 clockwise rotation is positive rotation), under the tension of the elastic device, the first helical gear 331 is relatively screwed into the second helical gear 341, so that the first bevel gear 33 is screwed into the second bevel gear 34, The first helical gear 331 meshes with the second helical gear 341 for transmission, thereby driving the second bevel gear 34 (clockwise rotation), the ring gear 321 (clockwise rotation), and the knob 1 (clockwise rotation) to rotate in the positive direction; To increase the length of the time limit, you can further turn the knob 1 in the opposite direction. The knob 1 (turn counterclockwise) rotates in the opposite direction to drive the ring gear 321 (turn counterclockwise) and the second bevel gear 34 (turn counterclockwise) to Rotating in the opposite direction, the first helical gear 331 relatively rotates out of the second helical gear 341, causing the first bevel gear 33 to escape from the second bevel gear 34 and compress the elastic device. This technical solution can avoid damaging the motor 31 by forcibly twisting the motor 31 when the length of time is increased in the middle of the time limit (the motor 31 has been started).

Further, the elastic device is a spring 35 that abuts between the first helical gear 331 and the motor 31.

The above examples of this case are provided for the convenience of explanation only, and should not be used to limit the meaning of this case, that is, all the various design changes made in accordance with the scope of the listed patent applications should be included in the scope of patents of this case.

Knob 1 Rotary axis 11 Control department 12 Cavity 13 Time-limited trigger 14 Slot 15 Elastic buckle 151 Shaft fixing seat 2 Shaft hole 21 Host 3 Rotating ring 32 Motor 31 Ring gear 321 First bevel gear 33 First helical gear 331 Second bevel gear 34 Second helical gear 341 Third helical gear 342 Spring 35 Trigger switch 42 within a limited time Contact feet 421

Figure 1 is an exploded perspective view of the present invention. Figure 2 is a perspective view of the present invention. Figure 3 is a cross-sectional view of the present invention.

Knob 1 Rotary axis 11 Control department 12 Cavity 13 Trigger 14 Card slot 15 Elastic buckle 151 Shaft fixing seat 2 Shaft hole 21

Claims (7)

A gas time limit closing device, comprising a knob (1), the knob (1) is detachably installed with a shaft fixing seat (2), and the shaft fixing seat (2) has more than two groups, and one of them is installed on the knob (1). ), the shaft fixing seat (2) is provided with a shaft hole (21) for inserting the rotating shaft (11) into the knob (1). The shaft hole (21) of each group of shaft fixing seat (2) has a different aperture size; The knob (1) is installed with different shaft fixing seats (2) to change the shaft diameter of the rotating shaft (11) that can be inserted into the knob (1); wherein, the gas time limit shut-off device also includes a host (3), The main machine (3) is provided with a motor (31) and a rotating ring (32). The knob (1) is installed in the middle of the rotating ring (32). The outer ring of the rotating ring (32) is provided with a ring gear (321). ), the motor (31) is in transmission connection with the ring gear (321); wherein, the transmission shaft of the motor (31) is provided with a first bevel gear (33), and the first bevel gear (33) passes through the second bevel gear The gear (34) is in transmission connection with the ring gear (321); wherein the outer cone of the first bevel gear (33) is provided with a first helical gear (331), and a second bevel gear (34) A second helical gear (341) is provided on the inner cone surface, and a third helical gear (342) is provided on the outer cone surface. The third helical gear (342) meshes with the ring gear (321) for transmission. The gear (33) can be inserted into the second bevel gear (34) or removed from the second bevel gear (34) through the elastic device; the motor (31) rotates in the positive direction, and under the tension of the elastic device, the first A helical gear (331) is relatively screwed into the second helical gear (341), so that the first bevel gear (33) is screwed into the second bevel gear (34), the first helical gear (331) and the second helical gear (341) The meshing transmission drives the second bevel gear (34), the ring gear (321), and the knob (1) to rotate in the positive direction; the knob (1) rotates in the opposite direction to drive the ring gear (321), The second bevel gear (34) rotates in the opposite direction, the first bevel gear (331) is relatively rotated out of the second bevel gear (341), so that the first bevel gear (33) is separated from the second bevel gear (34) Pull out and compress the elastic device. For example, the gas time limit closing device described in item 1 of the scope of patent application, wherein, after the shaft fixing seat (2) and the knob (1) are installed, the rotation centers of the knob (1) and the shaft hole (21) overlap. For example, the gas time-limiting device described in item 1 of the scope of patent application, wherein the front surface of the knob (1) forms a gripping portion (12), and the back surface is recessed with a cavity (13) for installing the shaft fixing seat (2). For example, the gas time-limiting shut-off device described in item 1 of the scope of patent application, wherein the side surface is provided with a time-limiting trigger part (14). For example, the gas time limit closing device described in item 1 of the scope of patent application, wherein the knob (1) is provided with a slot (15) for inserting the shaft fixing seat (2), and the slot (15) is provided with a The elastic buckle part (151) is fastened to the shaft fixing seat (2). For example, the gas time-limited shutdown device described in item 1 of the scope of patent application, wherein the host (3) is provided with an electric control board (4) and a time-limited trigger switch (42), and the electronic control board (4) and the time-limited trigger The switch (42) and the motor (31) are electrically connected. The time-limited trigger switch (42) is provided with a contact foot (421) that abuts against the side of the knob (1); when the knob (1) rotates in the opposite direction, the touch The foot (421), the time-limited trigger switch (42) feeds back signals to the electric control board (4), so that the electric control board (4) drives the motor (31) to rotate in the positive direction, thereby driving the ring gear (321) and the knob (1) to Rotate in the positive direction until the knob (1) touches the contact foot (421) again, and the trigger switch (42) again feeds back signals to the electric control board (4) within a time limit, so that the electric control board (4) driving motor (31) stops. For example, the gas time limit closing device described in item 1 of the scope of patent application, wherein the elastic device is a spring (35) abutting between the first helical gear (331) and the motor (31).

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