CN217969535U - Automatic power-off device of hand crank for electric switch machine - Google Patents

Abstract

The utility model discloses an automatic power-off device of a hand crank for an electric switch machine, which comprises a switch base and the hand crank; the left end of the switch base is provided with a first cavity which is longitudinally communicated; the first cavity is used for longitudinally inserting a crank joint of a crank; the right end of the switch base is provided with a second cavity which is transversely distributed; the second cavity is vertically communicated with the first cavity; the upper side and the lower side of the right end of the switch base are respectively provided with a vertically through long circular groove; the upper side and the lower side of the second cavity are respectively communicated with the two long circular grooves; the two long circular grooves are respectively provided with a quick-acting switch; a switch shaft is arranged on the second cavity; a return spring is arranged at the right end of the switch shaft; the reset spring is sleeved at the left end of the guide shaft; the right end of the guide shaft is connected with the inner side of the left end of the plug; the outer side of the left end of the plug is connected with the right end of the second cavity. The utility model discloses can be when the crank inserts automatic disconnection goat actuating circuit, the personal safety of manual operation personnel is protected conscientiously in the power supply of automatic recovery goat actuating circuit when the crank takes out.

Description

Automatic power-off device of hand crank for electric switch machine

Technical Field

The utility model relates to a railway switch conversion equipment technical field especially relates to a hand automatic power-off device for electric goat.

Background

The point switch is an important signal basic device for reliably converting the position of a turnout, changing the opening direction of the turnout, locking a switch point rail and reflecting the position of the turnout, and can well ensure the driving safety, improve the transportation efficiency and improve the labor intensity of driving personnel.

The main functions of the electric switch machine are as follows: the switch point rail is converted and locked, the opening direction of the turnout is changed, and the position state of the switch point rail is reflected through the contact, so that the switch point rail is one of important devices for ensuring high-efficiency, safe and orderly operation of railway transportation.

At present, when the electric switch machine is operated manually, the safety switch of the switch machine needs to be manually disconnected firstly, then, the hand crank is used for carrying out hand operation (aiming at driving the reducer of the electric switch machine, so that the switch machine can convert the position of a turnout), and after the operation is finished and the hand crank is taken out, the safety switch needs to be manually recovered. The safety switch of the switch machine is connected in series in the switch machine operating circuit, and after the safety switch is turned off, the switch machine cannot operate even if the switch machine is powered on by misoperation in the control room. The personal protection scheme effectively protects the personal safety of railway operators and is widely applied to the railway signal industry.

However, some customers have new requirements for electric switch machines, and require that the switch machine operating circuit in which the safety switch of the switch machine is located should be automatically powered off when the hand crank is inserted and automatically powered back when the hand crank is removed.

Therefore, there is an urgent need to develop a technology that can meet the new requirements of customers, practically protect the personal safety of manual operators of electric switch machines, and avoid injury to the operators.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a hand crank auto-power-off device for electric goat to the technical defect that prior art exists.

Therefore, the utility model provides an automatic power-off device of a hand crank for an electric switch machine, which comprises a switch base and the hand crank;

the left end of the switch base is provided with a first cavity which is longitudinally communicated and in a circular tube shape;

the first cavity is used for longitudinally inserting a crank joint on the hand crank;

the right end of the switch base is provided with a second cavity which is transversely distributed and in a circular tube shape;

the second cavity is vertically communicated with the first cavity;

the upper side and the lower side of the right end of the switch base are respectively provided with a vertically through long circular groove;

the second cavity is positioned between the two long circular grooves, and the upper side and the lower side of the second cavity are respectively communicated with one side adjacent to the two long circular grooves;

a quick-acting switch is respectively arranged on the two long circular grooves;

the two quick-acting switches are distributed in an up-and-down symmetrical manner;

the second cavity is provided with switch shafts which are transversely distributed;

the right end of the switch shaft is provided with a reset spring which is transversely distributed;

the reset spring is sleeved outside the left end of one guide shaft;

the right end of the guide shaft is connected with the inner side of the left end of one plug;

the outer side of the left end of the plug is in threaded connection with the right end of the second cavity.

Preferably, one end of the hand crank is provided with a crank joint;

one end of the crank joint is fixedly connected with the crank rod through a connecting pin;

the other end of the crank joint is used for butting a hand crank shaft on the reducer of the existing electric switch machine after penetrating and inserting into the first cavity.

Preferably, a mounting flange is arranged at the rear end of the first cavity;

four first cavity mounting holes are arranged at the peripheral edge of the mounting flange at equal intervals;

the inner side of the mounting flange is provided with rabbets which are distributed in a surrounding way;

the spigot is used for matching and butting with a hand-cranking shaft bearing mounting hole on the existing electric switch machine reducer;

the rear end of the first cavity is connected with a mounting hole reserved on the existing electric switch machine speed reducer through the mounting flange.

Preferably, the second cavity comprises a second cavity cylindrical hole which is transversely distributed and hollow;

the left side of the cylindrical hole of the second cavity is communicated with the right side of the first cavity;

a switch shaft capable of sliding transversely is arranged in the cylindrical hole of the second cavity.

Preferably, the right end of the second cavity is provided with an internal thread section of the right end opening of the second cavity which is transversely distributed and hollow;

the left side of the internal thread section of the right end opening of the second cavity is communicated with the right side of the cylindrical hole of the second cavity;

the right opening of the internal thread section of the opening at the right end of the second cavity body;

the inner thread section of the right end opening of the second cavity is in threaded connection with the plug external thread arranged on the outer side of the left end of the plug.

Preferably, when the crank joint of the hand crank is not inserted into the first cavity, the outer surface of the small cylindrical section of the switch shaft is in contact with the roller on the quick-acting switch;

the switch shaft is used for pushing the roller on the quick-acting switch to move upwards to disconnect the contact on the quick-acting switch and further disconnect the action circuit of the switch machine when the crank joint of the hand crank is inserted into the first cavity, and pushing the roller on the quick-acting switch to move downwards to close the contact on the quick-acting switch and further connect the action circuit of the switch machine when the crank joint of the hand crank is taken out of the first cavity;

the contact of the quick-acting switch is connected in series in the operating circuit of the switch machine.

Preferably, the right end of the switch shaft is provided with switch shaft cylindrical holes which are transversely distributed and have openings on the right side;

the reset spring is arranged in the cylindrical hole of the switch shaft;

the left end and the right end of the guide shaft are respectively provided with a spring insertion rod and an external thread part at the right end of the guide shaft;

the guide shaft is provided with a flat part between the spring insertion rod and the external thread part at the right end of the guide shaft;

the spring insertion rod is inserted with the return spring;

the external thread part at the right end of the guide shaft is in threaded connection with a plug internal thread hole arranged on the inner side of the left end of the plug;

reset spring for when not inserting the crank in first cavity, let the left end extension of switch shaft stretch out to first cavity in to and when taking out the crank in first cavity, carry out the elasticity with the left end extension of switch shaft and reset.

Preferably, the top surface and the bottom surface of the switch seat are respectively provided with a switch seat threaded hole at the left side and the right side of the long circular groove;

the left side and the right side of each quick-acting switch are respectively provided with a shell mounting block which is horizontally distributed in the transverse direction;

the two shell mounting blocks are correspondingly mounted on a switch base threaded hole through screws;

a washer is arranged between the nut of the screw and the threaded hole of the switch seat;

the screw passes perpendicularly through the bore of the washer.

Preferably, the middle part of the switch shaft is provided with a large cylindrical section and a small cylindrical section which are transversely distributed;

the large cylindrical section and the small cylindrical section are connected through an inclined plane transition section;

the left side of the large cylindrical section is connected with the right end of the left end extension part;

the left end part of the left end extending part is in a smooth hemispherical shape;

the diameter of the large cylindrical section is larger than that of the small cylindrical section;

the diameter of the bevel transition section is gradually reduced from left to right;

the section of the inclined plane transition section is in a shape of a truncated cone.

Preferably, the switch base is arranged on an existing electric switch machine reducer;

the electric switch machine reducer is arranged in a hollow box body of the electric switch machine;

the box body is provided with a cover capable of being rotatably opened;

a crank hole is arranged at the front side of the machine cover and at the position corresponding to the front end opening of the first cavity on the switch base;

a detachable crank hole cover is hermetically arranged on the crank hole;

and the crank hole is used for enabling a crank joint of the crank to penetrate through and be inserted into the crank hole, and then the crank hole penetrates through the first cavity to be in butt joint with a crank shaft on the existing speed reducer of the electric switch machine.

By above the utility model provides a technical scheme is visible, compares with prior art, the utility model provides an electric goat is with hand goat auto-power-off device, its design science can be at hand goat operating circuit of automatic disconnection when inserting, and the power supply of auto-recovery goat operating circuit when the hand is taken out protects electric goat manual operation personnel's personal safety conscientiously, avoids causing the injury to operating personnel, has great practical meaning.

Drawings

Fig. 1 is a schematic three-dimensional structure diagram of an automatic power-off device of a crank handle for an electric switch machine provided by the utility model;

fig. 2 is a front view of the automatic power-off device of the crank handle for the electric switch machine provided by the utility model;

fig. 3 is a front view of a crank handle matched with the automatic power-off device of the crank handle for the electric switch machine;

fig. 4 is a schematic view of a three-dimensional structure of a switch base in the automatic power-off device of the crank handle for the electric switch machine provided by the present invention;

fig. 5 is a top view of a switch base in the automatic power-off device of the crank handle for the electric switch machine provided by the present invention;

FIG. 6 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

fig. 8 is a front view of a switch shaft in the automatic power-off device of the crank handle for the electric switch provided by the present invention;

fig. 9a is a front view of a guide pin in the automatic power-off device of a crank handle for an electric switch machine according to the present invention;

fig. 9b is a left side view of the guide pin in the automatic power-off device of the crank handle for the electric switch machine according to the present invention;

fig. 10 is a front view of a plug in the automatic power-off device of a crank handle for an electric switch machine according to the present invention;

fig. 11 is a schematic perspective view of an embodiment of any one of the snap switches (which is a conventional snap switch) provided in the automatic power-off device of the crank handle for the electric switch according to the present invention;

fig. 12 is a three-dimensional view of the automatic power-off device for the crank handle of the electric switch machine, which is provided by the utility model and is installed on the gear box of the electric switch machine;

fig. 13 is installed the utility model provides a pair of electric goat reduction gear of hand automatic power-off device for electric goat installs the three-dimensional view on electric goat.

In the figure: 1-a switch base; 2-a switch shaft; 3-a return spring; 4-a guide pin; 5-plugging by screws;

6-a quick-acting switch; 7-a screw; 9-crank joint; 10-a connecting pin; 11-a rocker bar;

12-electric switch reducer; 13-electric switch machine.

Detailed Description

The technical solutions of the present invention will be described clearly and completely below with reference to embodiments of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 8, 9a, 9b, 10 to 13, the present invention provides an automatic power-off device for a crank handle of an electric switch, which comprises a switch base 1 and a crank handle 100;

the left end of the switch base 1 is provided with a first cavity 101 which is longitudinally through and in a circular tube shape;

a first cavity 101 for longitudinally inserting the crank joint 9 on the crank 100;

a second cavity 102 which is transversely distributed and in a circular tube shape is arranged at the right end of the switch base 1;

the second cavity 102 is vertically communicated with the first cavity 101;

the upper side and the lower side of the right end of the switch base 1 are respectively provided with a vertically through long circular groove 105;

the second cavity 102 is located between the two long circular grooves 105, and the upper side and the lower side of the second cavity 102 are respectively communicated with one side of the two long circular grooves 105 adjacent to each other;

the two long circular grooves 105 are respectively provided with a quick-acting switch 6;

the two quick-acting switches 6 are symmetrically distributed up and down;

the second cavity 102 is provided with switch shafts 2 which are distributed transversely;

the right end of the switch shaft 2 is provided with a reset spring 3 which is transversely distributed;

the reset spring 3 is sleeved outside the left end of one guide shaft 4;

the right end of the guide shaft 4 is connected with the inner side of the left end of a plug 5;

the outer side of the left end of the plug 5 is in threaded connection with the right end of the second cavity 102.

In the utility model, a crank joint 9 is arranged at one end of a crank handle 100;

one end of the crank joint 9 is fixedly connected with a crank rod 11 through a connecting pin 10.

The other end of the handle joint 9 is inserted into the first cavity 101 and then abutted against a hand shaft of the conventional electric switch reducer 12 (the hand shaft is located inside a hand shaft bearing mounting hole of the conventional electric switch reducer 12).

In the present invention, in the specific implementation, the left side of the second cavity 102 is connected to the right side of the first cavity 101.

In the utility model, in particular, a mounting flange 104 is arranged at the rear end of the first cavity 101;

four first cavity mounting holes 1040 are arranged at equal intervals on the peripheral edge of the mounting flange 104;

the inner side of the mounting flange 104 is provided with a spigot 103 which is distributed in a surrounding way;

the spigot 103 is used for matching and butting with a hand-cranking shaft bearing mounting hole on the existing electric switch machine reducer 12;

the rear end of the first cavity 101 is connected with a mounting hole (specifically, a connecting screw) reserved on the existing electric switch machine reducer 12 through the mounting flange 104.

It should be noted that, through the above design, the existing electric switch reducer 12 can be conveniently modified, and the switch base 1 can be mounted on the existing electric switch reducer 12 only by detaching the original bearing end cover, and the switch base can be fixed on the electric switch reducer through the four first cavity mounting holes on the mounting flange 104 on the switch base 1.

In the present invention, in a specific implementation, the second cavity 102 includes a hollow second cavity cylindrical hole 107 distributed transversely;

the left side of the second cavity cylindrical bore 107 is in communication with the right side of the first cavity 101;

a laterally slidable switch shaft 2 is disposed in the second cavity cylindrical bore 107.

In a specific implementation, the right end of the second cavity 102 is provided with a hollow internal thread section 106 of the right end opening of the second cavity, which is transversely distributed;

the left side of the internal thread section 106 of the opening at the right end of the second cavity is communicated with the right side of the cylindrical hole 107 of the second cavity;

the right opening of the internal threaded section 106 in the right end opening of the second cavity;

the inner thread section 106 of the right end opening of the second cavity is in threaded connection with the plug outer thread 502 arranged on the outer side of the left end of the plug 5.

It should be noted that the switch shaft 2 is installed in the second cavity cylindrical hole 107 of the second cavity 102, the switch shaft 2 can freely slide in the second cavity cylindrical hole 107, and the switch shaft 2 and the second cavity cylindrical hole 107 are in clearance fit.

In the utility model, in the concrete implementation, the right end of the switch shaft 2 is provided with a switch shaft cylindrical hole 203 which is transversely distributed and has an opening on the right side;

the reset spring 3 is arranged in the cylindrical hole 203 of the switch shaft;

the left and right ends of the guide shaft 4 are respectively provided with a spring insertion rod 401 and a right end external thread part 402 of the guide shaft;

a spring insertion rod 401 inserted into the return spring 3;

the external thread part 402 at the right end of the guide shaft is in threaded connection with a plug internal thread hole 501 formed in the inner side of the left end of the plug 5;

the return spring 3 is used for extending the left end extending part 201 of the switch shaft 2 into the first cavity 101 (only extending a small section) when the hand crank 100 is not inserted into the first cavity 101, and elastically resetting the left end extending part 201 of the switch shaft 2 when the hand crank 100 is taken out of the first cavity 101.

Specifically, the guide shaft 4 is provided with a flat 404 at a position between the spring insertion rod 401 and the male screw portion 402 at the right end of the guide shaft.

The return spring 3 can hold the switch shaft 2 at the extended position by a spring force, and elastically returns the switch shaft 2 when the hand lever is removed. In order to prevent the return spring 3 from inclining, a guide pin 4 is provided, the guide pin 4 is fixed with a plug female screw hole 501 on the plug 5 through a guide shaft right end male screw part 402 on the guide pin 4, and a flat 404 is provided on the guide pin 4 for the convenience of screwing.

It should be noted that the plug 5 mainly functions to provide support for the switch shaft 2 and the return spring 3.

In the present invention, in a specific implementation, referring to fig. 5, the top surface and the bottom surface of the switch base 1 are both provided with a switch base threaded hole 108 on the left and right sides of the long circular groove 105;

the left side and the right side of each quick-acting switch 6 are respectively provided with a shell mounting block which is horizontally distributed in the transverse direction;

the two shell mounting blocks are correspondingly mounted on a switch base threaded hole 108 through a screw 7.

In a concrete implementation, a gasket is arranged between the nut of the screw 7 and the switch seat threaded hole 108;

the screw 7 passes perpendicularly through the inner bore of the washer.

In the utility model, in the concrete implementation, the middle part of the switch shaft 2 is provided with a large cylindrical section 202 and a small cylindrical section 204 which are transversely distributed;

the large cylindrical section 202 and the small cylindrical section 204 are connected through a bevel transition section 205;

the left side of the large cylindrical section 202 is connected with the right end of the left end extension 201;

the left end of the left end extension 201 is smooth and hemispherical;

the diameter of the large cylindrical section 202 is larger than that of the small cylindrical section 204;

the diameter of the bevel transition section 205 gradually decreases from left to right;

in specific implementation, the diameter of the left end extension 201 is smaller than that of the large cylindrical section 202.

In particular, the cross-sectional shape of the bevel transition section 205 is a truncated cone shape.

In a specific implementation, the switch shaft cylindrical hole 203 is located at the right end part of the large cylindrical section 202, and inside the inclined transition section 205 and the small cylindrical section 204.

It should be noted that, during normal operation of the electric switch machine, the left end extension 201 of the switch shaft 2 is held in the extended position by the spring force of the return spring 3, and the two rollers 601 of the two snap switches 6 are in contact with the outer surface of the small cylindrical section 204 of the switch shaft 2.

When the crank joint 9 of the handle 100 is inserted into the first cavity 101, the crank joint 9 is abutted against a hand crank shaft on the existing electric switch reducer 12, the left end extension 201 of the switch shaft 2 moves to the right under the action of the crank joint 9, and when the switch shaft 2 moves to the right, the two rollers 601 on the two snap switches 6 move upwards along the inclined plane of the inclined plane transition section 205 of the switch shaft 2 until the contacts of the snap switches 6 are disconnected.

As the hand crank 100 is inserted further, the switch shaft 2 moves further to the right, the two rollers 601 on the two snap switches 6 climb onto the surface of the large cylindrical section 202 on the switch shaft 2, and when the switch shaft 2 moves further, the two rollers 601 on the two snap switches do not climb any more.

In particular realizing, the utility model discloses the fast switch 6 of chooseing for use, the contact on it is the closed condition under the normal conditions, inserts the crank joint 9 of handle 100 in first cavity 101, and the left end extension 201 of push switch axle 2 moves right for when gyro wheel 601 upward movement on the fast switch 6 one section presets distance S1, the contact on the fast switch 6 can break off in the twinkling of an eye. This feature ensures that the contacts on the quick-action switch 6 are only opened when the hand crank 100 is inserted in position, so that the switch machine operating circuit is broken.

Similarly, when the crank joint 9 of the handle 100 is taken out of the first cavity 101, the left-end extension 201 of the switch shaft 2 moves to the left to reset, so that the roller 601 on the quick switch 6 moves downwards for a preset distance S2, and the contact on the quick switch 6 can be closed instantly, so that the switch machine is powered on. It should be noted that if the distance of downward movement of the roller 601 does not reach the preset distance S2, the contact on the snap switch 6 is not closed, and this characteristic ensures that: when the hand crank is manually switched (i.e. the electric switch reducer is driven by hand operation), although the hand crank shakes (i.e. slightly touches the left end extension 201 of the switch shaft 2), the roller 601 on the quick-acting switch 6 does not contact the contact point when moving downwards. Meanwhile, the preset distance S1 is required to be larger than S2, so that the contact of the quick-action switch 6 can be switched on only if the hand crank is completely separated from the hand rocking shaft of the point switch.

In order to ensure that the power source of the switch machine can be disconnected (i.e., the switch machine operating circuit can be disconnected) when the contact on the quick-acting switch 6 is opened, the contact on the quick-acting switch 6 is connected in series to the power source line of the switch machine (i.e., the switch machine operating circuit).

It should be noted that, in the present invention, when the electric switch machine works normally (at this time, the crank joint of the crank handle 100 is not inserted into the first cavity 101), the outer surface of the small cylindrical section 204 of the switch shaft 2 contacts with the roller 601 on the snap switch 6;

the switch shaft 2 is used for pushing the roller 601 on the quick switch 6 to move upwards (at this time, the left end extension 201 of the switch shaft 2 is pushed to the right by the crank joint 9, and then the roller 601 on the quick switch 6 moves from the right to the left relative to the switch shaft 2 and is lifted up) when the crank joint 9 of the hand crank 100 is inserted into the first cavity 101, so that the contact on the quick switch 6 is disconnected, and further the switch machine action circuit is disconnected, and for pushing the roller 601 on the quick switch 6 to move downwards (at this time, the left end extension 201 of the switch shaft 2 is not pushed to the right by the crank joint 9, the left end extension 201 moves to the left again, and further the roller 601 on the quick switch 6 moves from the left to the right relative to the switch shaft 2 and is lowered in height) when the crank joint 9 of the hand crank 100 is taken out of the first cavity 101, so that the contact on the quick switch 6 is closed, and further the switch machine action circuit is conducted;

the contacts of the snap switch 6 are connected in series in the power supply line of the switch machine, i.e. the switch machine operating circuit.

It should be noted that the roller 601 on the quick acting switch 6 can move upwards under the action of an external force (specifically, the switch shaft 2), and the roller 601 can move downwards under the action of an external force (specifically, the switch shaft 2), and as the moving distance and the moving direction of the roller 601 are different, the working state of the upper contact of the quick acting switch 6 can be correspondingly adjusted, so that the contact is opened or closed, and the power supply line (i.e., the switch machine operating circuit) of the switch machine connected in series with the contact on the quick acting switch 6 is correspondingly opened or closed.

It should be noted that, as for the snap switch 6, which is an existing snap switch, the roller 601 thereon can move upward and 601 can move downward, and the operating state (open or closed conduction) of the contact on the snap switch 6 can be adjusted according to the difference between the upward movement distance and the downward movement distance of the roller 601.

It should be noted that, for the quick-acting switch 6, the selection of the upward off stroke S1 and the downward on stroke S2 is related to the horizontal distance of the switch shaft when the hand crank is inserted, so as to ensure that the switch shaft can force the quick-acting switch roller to rise by the distance S1 to disconnect the contact when the hand crank is just combined with the hand crank shaft on the speed reducer after being inserted. When the hand crank is taken out and is separated from the hand shaft on the speed reducer, the switch shaft is reset, and when the roller on the quick-acting switch moves downwards under the action of the spring to form S2, a power circuit of the motor (namely a switch machine operating circuit) is switched on.

The utility model discloses in, predetermine distance S1 and S2, all be the distance of vertical direction. The preset distance S1 is a distance (i.e., a height of the roller 601) that the roller moves upward in the vertical direction; the preset distance S2 is a distance that the roller 601 moves downward in the vertical direction (i.e., a height of descent).

In the present invention, each snap switch 6 is provided with a roller 601; the two rollers 601 are arranged in an up-down symmetrical manner, and two power supply lines can be disconnected through the contacts on the quick-acting switch 6 correspondingly controlled by the two rollers 601 respectively.

In the present invention, in the concrete implementation, the quick-acting switch 6 is the S800 type quick-acting switch produced by the german salterburg company, see fig. 11, there are two sets of terminals on the quick-acting switch 6, the upper layer is two normally open contact terminals 61, the lower layer is two normally closed contact terminals 62, and the ejector pin 63 keeps the quick-acting switch in the normally open contact on state (i.e. two normally closed contact terminals 62 are switched on) under the action of the spring 64. When the roller 601 moves upward, the push rod 63 is pushed to move upward, so that the contacts of the snap switch 6 are driven to be opened (i.e. the two normally closed contact posts 62 are opened). It should be noted that the motor power line (i.e. the power line on the switch machine operating circuit) of the present invention is connected in series to the normally closed contact terminal 62 on the lower layer of the quick-acting switch 6, while the normally open contact terminal on the upper layer of the quick-acting switch 6 is idle (not used).

In the present invention, in terms of specific implementation, referring to fig. 12 and 13, the switch base 1 is disposed on a reducer 12 of an existing electric switch machine;

an electric switch reducer 12 provided in a hollow box of an electric switch 13;

the box has a lid 14 which can be rotated open (mounted by hinging);

a crank hole is arranged on the front side of the cover 14 and at a position corresponding to the front end opening of the first cavity 101 on the switch base 1;

a detachable crank hole cover 15 is hermetically arranged on the crank hole; the handle hole cover 15 can be unscrewed.

And the crank hole is used for enabling the crank joint 9 of the crank 100 to penetrate through and be inserted into the first cavity 101 to be butted with a crank shaft on the existing electric switch reducer 12.

It should be noted that the crank joint 9 is provided with a hand shaft butt-joint groove 90 with a left opening (the hand shaft butt-joint groove 90 includes a left section, a middle section and a right section which are sequentially communicated, the left section is a cylindrical cavity, the middle section is a cavity with a truncated cone shape, and the right end is a cavity with a rectangular longitudinal section), and the hand shaft butt-joint groove 90 is correspondingly inserted into the hand shaft of the existing electric switch reducer 12.

It should be noted that, two ends of the hand shaft of the conventional electric goat decelerator 12 may be respectively connected to a set of the device of the present invention, as shown in fig. 12.

The switch base 1 is attached to the electric switch machine reducer 12 through a spigot 103. After the assembly is completed, the electric switch reducer 12 is mounted on the electric switch 13. When the electric switch machine 13 needs to be operated by hand, if the cover 14 is not opened, the crank hole cover 15 on the cover 14 can be unscrewed, and then the hand crank 100 is inserted to operate the electric switch machine 13 by hand. Alternatively, the electric switch machine 13 may be manually operated by opening the cover 14 and directly inserting the hand lever 100. In any case, it is ensured that the action circuit of the switch machine is disconnected when the hand crank is inserted and the power circuit of the switch machine is automatically disconnected when the hand crank is removed.

The utility model discloses in, in the concrete realization, the electric goat reduction gear is the part on the ZD (J) 9 series of electric goat of Tianjin railway signal limited liability company production. The function is to transmit the rotation motion of the motor to the friction coupler on the ball screw, thereby driving the electric point switch to switch the turnout. In order to manually operate the switch machine, a hand gear and a hand crank shaft are arranged on the electric switch machine reducer, and the hand crank handle is used for rotating the hand crank shaft on the electric switch machine reducer, so that the switch machine can be manually operated to switch the turnout.

Based on the above technical solution, to the utility model discloses, it includes the switch block and the purpose-made crank that constitute by switch seat, fast-acting switch, switch axle and reset spring. Wherein, install switch shaft and reset spring in the cavity of switch seat, the switch shaft action when the crank is inserted to the contact disconnection with the snap switch. When the hand crank is taken out, the switch shaft is reset under the action of the reset spring, and the contact of the quick-acting switch is restored to be connected, so that the switch machine action circuit is automatically disconnected when the hand crank is inserted, and the function of the switch machine action circuit can be automatically restored when the hand crank is taken out after the operation is finished.

The utility model discloses can prevent that the goat maloperation from causing the injury to maintainer, when the operation is accomplished and is taken out the crank, the goat action circuit automatic recovery power supply prevents that maintainer from forgetting the recovery circuit and leading to the unable action of goat simultaneously, improves work efficiency, avoids the work error.

To sum up, compare with prior art, the utility model provides a pair of hand goat auto-power-off device for electric goat, its design science can be when the hand is inserted automatic disconnection goat actuating circuit, and the power supply of automatic recovery goat actuating circuit when the hand is taken out protects electric goat hand operation personnel's personal safety conscientiously, avoids causing the injury to operating personnel, has great practical meaning.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An automatic power-off device of a hand crank for an electric switch machine is characterized by comprising a switch base (1) and the hand crank (100);

the left end of the switch base (1) is provided with a first cavity (101) which is longitudinally penetrated and in a circular tube shape;

a first cavity (101) for longitudinal insertion of a crank connector (9) on a crank (100);

the right end of the switch base (1) is provided with a second cavity (102) which is transversely distributed and in a circular tube shape;

the second cavity (102) is vertically communicated with the first cavity (101);

the upper side and the lower side of the right end of the switch base (1) are respectively provided with a vertically through long circular groove (105);

the second cavity (102) is positioned between the two long circular grooves (105), and the upper side and the lower side of the second cavity (102) are respectively communicated with one adjacent sides of the two long circular grooves (105);

a quick-acting switch (6) is respectively arranged on the two long circular grooves (105);

the two quick-acting switches (6) are distributed in a vertical symmetrical way;

the second cavity (102) is provided with switch shafts (2) which are transversely distributed;

the right end of the switch shaft (2) is provided with a reset spring (3) which is transversely distributed;

the reset spring (3) is sleeved outside the left end of one guide shaft (4);

the right end of the guide shaft (4) is connected with the inner side of the left end of a plug (5);

the outer side of the left end of the plug (5) is in threaded connection with the right end of the second cavity (102).

2. The automatic power-off device of the crank handle for the electric switch machine as claimed in claim 1, wherein one end of the crank handle (100) is provided with a crank handle joint (9);

one end of the crank joint (9) is fixedly connected with a crank rod (11) through a connecting pin (10);

the other end of the crank joint (9) is used for butting a hand crank shaft on the existing speed reducer (12) of the electric switch machine after being inserted into the first cavity (101).

3. The automatic power-off device of the hand crank for the electric switch machine as claimed in claim 1, characterized in that a mounting flange (104) is provided at the rear end of the first cavity (101);

four first cavity mounting holes (1040) are arranged at the peripheral edge of the mounting flange (104) at equal intervals;

the inner side of the mounting flange (104) is provided with rabbets (103) distributed in a surrounding way;

the spigot (103) is used for matching and butting with a hand-cranking shaft bearing mounting hole on the existing speed reducer (12) of the electric switch machine;

the rear end of the first cavity (101) is connected with a mounting hole reserved on the existing electric switch machine speed reducer (12) through the mounting flange (104).

4. The device for automatically disconnecting the power of a handle for an electric switch machine according to claim 1, characterized in that the second cavity (102) comprises a second cavity cylindrical hole (107) which is hollow and distributed transversely;

the left side of the cylindrical hole (107) of the second cavity is communicated with the right side of the first cavity (101);

a switch shaft (2) capable of sliding transversely is arranged in the cylindrical hole (107) of the second cavity.

5. The automatic power-off device of the hand crank for the electric switch machine as claimed in claim 4, characterized in that the right end of the second cavity (102) is provided with an internal thread section (106) of the opening at the right end of the second cavity which is transversely distributed and hollow;

the left side of the internal thread section (106) of the opening at the right end of the second cavity is communicated with the right side of the cylindrical hole (107) of the second cavity;

the right opening of the internal thread section (106) of the opening at the right end of the second cavity body;

the internal thread section (106) of the right end opening of the second cavity is in threaded connection with a plug external thread (502) arranged on the outer side of the left end of the plug (5).

6. The automatic power-off device of the crank handle for the electric switch machine as claimed in claim 1, characterized in that when the crank handle joint of the crank handle (100) is not inserted in the first cavity (101), the outer surface of the small cylindrical section (204) of the switch shaft (2) is in contact with the roller (601) of the quick-acting switch (6);

the switch shaft (2) is used for pushing a roller (601) on the quick-acting switch (6) to move upwards to disconnect a contact on the quick-acting switch (6) and further disconnect a switch machine action circuit when the crank joint (9) of the handle (100) is inserted into the first cavity (101), and pushing the roller (601) on the quick-acting switch (6) to move downwards to close the contact on the quick-acting switch (6) and further connect the switch machine action circuit when the crank joint (9) of the handle (100) is taken out of the first cavity (101);

the contacts of the quick-acting switch (6) are connected in series in the operating circuit of the switch machine.

7. The automatic power-off device of the hand crank for electric switch machine as claimed in any of claims 1 to 6, characterized in that the right end of the switch shaft (2) is provided with a switch shaft cylindrical hole (203) which is transversely distributed and has an opening on the right side;

the reset spring (3) is arranged in the cylindrical hole (203) of the switch shaft;

the left end and the right end of the guide shaft (4) are respectively provided with a spring insertion rod (401) and a right end external thread part (402) of the guide shaft;

the guide shaft (4) is provided with a flat part (404) at the position between the spring insertion rod (401) and the external thread part (402) at the right end of the guide shaft;

the spring insertion rod (401) is inserted into the return spring (3);

the external thread part (402) at the right end of the guide shaft is in threaded connection with a plug internal thread hole (501) formed in the inner side of the left end of the plug (5);

the reset spring (3) is used for enabling the left end extending part (201) of the switch shaft (2) to extend into the first cavity (101) when the hand crank (100) is not inserted into the first cavity (101), and enabling the left end extending part (201) of the switch shaft (2) to be elastically reset when the hand crank (100) is taken out of the first cavity (101).

8. The automatic power-off device of the crank handle for the electric switch machine as claimed in claim 7, wherein the top surface and the bottom surface of the switch base (1) are provided with a switch base threaded hole (108) respectively at the left and right sides of the oblong slot (105);

the left side and the right side of each quick-acting switch (6) are respectively provided with a shell mounting block which is horizontally distributed in the transverse direction;

the two shell mounting blocks are correspondingly mounted on a switch base threaded hole (108) through a screw (7);

a washer is arranged between the nut of the screw (7) and the threaded hole (108) of the switch seat;

a screw (7) passes vertically through the inner bore of the washer.

9. A hand crank automatic power-off device for electric switch machines as claimed in any one of claims 1 to 6, characterized in that the middle of the switch shaft (2) has a large cylindrical section (202) and a small cylindrical section (204) distributed laterally;

the large cylindrical section (202) and the small cylindrical section (204) are connected through a bevel transition section (205);

the left side of the large cylindrical section (202) is connected with the right end of the left end extension part (201);

the left end part of the left end extending part (201) is in a smooth hemispherical shape;

the diameter of the large cylindrical section (202) is larger than that of the small cylindrical section (204);

the diameter of the bevel transition section (205) is gradually reduced from left to right;

the section of the inclined plane transition section (205) is in a shape of a truncated cone.

10. The automatic de-energizing device of hand crank for electric switch machine according to any of claims 1 to 6, characterized in that said switch base (1) is provided on the existing reducer (12) of electric switch machine;

an electric switch reducer (12) disposed in a hollow box of an electric switch (13);

the box body is provided with a cover (14) which can be rotatably opened;

a crank hole is arranged at the front side of the cover (14) and at a position corresponding to the front end opening of the first cavity (101) on the switch base (1);

a detachable crank hole cover (15) is hermetically arranged on the crank hole;

and the crank hole is used for enabling a crank joint (9) of the crank (100) to penetrate through and be inserted into the crank hole, and then the crank hole penetrates through the first cavity (101) to be butted with a crank shaft on the existing electric switch reducer (12).

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