Protective structure of extrusion cutting pin for point switch and point switch

Abstract

The invention discloses a protection structure of an extrusion cutting pin for a point switch and the point switch. The protection structure comprises an action rod, a rack block and a supporting plate are mounted on the outer side of the middle of the action rod; supporting plates are mounted at the left and right ends of the bottom of the rack block respectively; extrusion-cutting pins are respectively arranged at the upper parts of the left and right ends of the rack block; the lower part of the extrusion cutting pin is inserted into an elliptical groove in the upper end of the action rod; the middle of the bottom face of the front side of the rack block is connected with the rear end of the forward protruding part of the rack block. A vertical plate at the front end of the forward protruding part of the rack block is positioned in front of the rack block; the left end and the right end of the forward protruding part of the rack block are respectively provided with a trailable column mounting hole; a trailing-off column is mounted in each trailing-off column mounting hole; and the rear end of each extrusion column extends backwards into an inclined groove in the front side of the middle part of the action rod and is propped against the inclined groove. Safety protection can be carried out on the extrusion-cutting pin, the extrusion-cutting pin is prevented from being broken when the extrusion-cutting force does not reach the extrusion-cutting force standard value, and normal exertion of the function of the extrusion-cutting pin is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of railway turnout switching equipment, in particular to a protective structure of an extrusion pin for a switch machine and the switch machine. Background Art

[0002] A switch is an important signal infrastructure equipment used to reliably switch the position of switches, change the direction of switch opening, lock the switch point rail, and reflect the position and status of switches. It can effectively ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] In order to extend the service life of the switch machine, the sealed switch machine has emerged. The sealed switch machine is a new product that is improved and upgraded on the basis of the original switch machine. Its sealing performance directly affects the condition of the internal parts of the switch machine and the service life of the switch machine product.

[0004] For sealed switch machines, the shear pin is a key safety component in the switch machine. It is mainly installed between the operating rod and the rack block of the switch machine. Its core function is to protect the internal structure and mechanical parts of the switch machine by breaking itself when the switch encounters shearing, thereby avoiding serious damage to the equipment due to overload.

[0005] The rack block is the core transmission component in the switch machine. It is mainly installed between the operating rod and the gear set. It realizes the transmission of the switch conversion force through mechanical coordination with the operating rod, shear pin, and other components. After the motor in the switch machine is started, the rotational motion is converted into linear motion through the gear set (such as the reducer of the switch machine). The rack block meshes with the active gear in the gear set, becoming a link in power transmission. When the active gear in the gear set rotates, it pushes the rack block to move in the horizontal direction. Among them, the rack block is rigidly connected to the operating rod through the shear pin. When the rack block moves, it drives the operating rod to move synchronously, and then promotes the switch point rail conversion through the operating rod.

[0006] As for the shear pin, it is a connecting pin used to connect the actuating rod and the rack block to ensure that the actuating rod and the rack block move at the same time. At the same time, the shear pin can withstand the shear force of the standard force value without breaking, but it needs to break when the standard force value is exceeded, thereby protecting the safety of the train and the track and switch from damage.

[0007] However, due to the poor condition of the on-site switches, when the sealed switch is locked, the operating rod sometimes generates a shear force on the shear pin when a train passes by, and this force does not reach the standard value. After a period of repeated shearing, the shear pin is squeezed and broken even though the shear force does not reach the standard value, which is the phenomenon of "breaking without squeezing". After the shear pin breaks, the operating rod and the rack block cannot move relative to each other, resulting in the inability to transmit the mechanical power of the sealed switch. The sealed switch can no longer pull the switch through the operating rod, which means that the switch function is lost, directly rendering the sealed switch inoperable, and further causing switch switching failure, affecting driving safety.

[0008] In addition, as mentioned above, due to the phenomenon of the squeezing pins "breaking without squeezing", the squeezing pins on the sealed switch machines need to be regularly inspected and maintained, which makes the regular replacement of the squeezing pins at the railway site a large maintenance workload, requiring a large amount of manpower and material resources, and increasing the operating and maintenance costs of the sealed switch machines.

[0009] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the Invention

[0010] The purpose of the present invention is to provide a protective structure for a shear pin for a switch machine and a switch machine in view of the technical defects in the prior art.

[0011] To this end, the present invention provides a protective structure for a shear pin for a switch machine, which includes an operating rod, a rack block, a supporting plate, a shear column and a shear pin;

[0012] The rack block and the supporting plate are installed on the outer side of the middle part of the action rod;

[0013] A support plate is installed on the left and right ends of the bottom of the rack block respectively;

[0014] A cutting pin is provided on the upper part of the left and right ends of the rack block;

[0015] The lower part of the extrusion pin is inserted into the oval groove at the upper end of the action rod;

[0016] The middle portion of the bottom surface of the rack block is connected to the rear end of a forward protruding portion of the rack block;

[0017] The vertical plate at the front end of the forward protruding portion of the rack block is located in front of the rack block;

[0018] The left and right ends of the forward protruding portion of the rack block are respectively provided with an extrusion column mounting hole;

[0019] An extrusion column is installed in each extrusion column installation hole;

[0020] The rear end of each extrusion column extends backward into an oblique groove on the front side of the middle part of the action rod and abuts against the oblique groove.

[0021] In addition, the present invention also provides a switch machine, which includes the protective structure of the extrusion pin for the switch machine as described above.

[0022] It can be seen from the technical solution provided by the present invention above that, compared with the prior art, the present invention provides a protective structure for a shear pin for a switch machine and a switch machine, which are scientifically designed and can provide safety protection for the shear pin, preventing the shear pin from being squeezed off when the shear force does not reach the standard value, thereby ensuring the normal function of the shear pin and effectively avoiding the phenomenon of the shear pin "breaking without squeezing", which has great practical significance.

[0023] By applying the present invention, the original motion stretching transmission of the switch machine can be realized safely and reliably, ensuring normal motion and sealing functions of the sealed switch machine and normal operation of the extrusion pin.

[0024] After inspection, it is found that the protective structure of the shear pin for the switch provided by the present invention is a shear pin protective structure for a sealed electric switch. When used in a sealed electric switch, it will not reduce the sealing protection level of the entire machine, while ensuring the normal operation of the shear pin, eliminating the impact of the shear pin's "self-breaking without squeezing" failure caused by poor on-site turnout working conditions, and reducing on-site maintenance workload and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An exploded view of the structure of a protective structure for a shear pin for a switch provided by the present invention;

[0026] Figure 2 A separate assembly structure diagram of a protective structure for a shear pin for a switch provided by the present invention;

[0027] Figure 3 A schematic diagram of an actuating rod of a special structure used in an embodiment of a protective structure for a shear pin for a switch provided by the present invention;

[0028] Figure 4 An enlarged view of the assembly of a rack block and two supporting plates in a protective structure for a shear pin used in a switch provided by the present invention;

[0029] Figure 5 A half-section view of an extrusion column in a protective structure for an extrusion pin for a switch provided by the present invention, showing the disc spring and the internal and external structures of the extrusion column;

[0030] Figure 6 An enlarged structural diagram of a push rod in a protective structure for a shear pin used in a switch provided by the present invention;

[0031] Figure 7 An enlarged cross-sectional view of the front hole sleeve of the operating rod (i.e., the front sleeve assembly of the operating rod) in the protective structure of the extrusion pin for a switch provided by the present invention shows the composition of the sealing structure installed inside the front hole sleeve of the operating rod;

[0032] Figure 8 An enlarged cross-sectional view of the actuating rod rear sleeve (i.e., the actuating rod rear sleeve assembly) in the protective structure for the extrusion shear pin used in a switch provided by the present invention illustrates the composition of the sealing structure installed inside the actuating rod rear sleeve;

[0033] Figure 9 A cross-sectional view of a shear pin protection structure for a switch machine provided by the present invention installed on a sealed switch machine is provided to more intuitively illustrate the assembly of the shear pin protection structure for the sealed switch machine;

[0034] In the figure, 1-acting rod, 2-rack block, 3-support plate, 4-extrusion column, 5-first screw plug (i.e. large screw plug);

[0035] 6 - extrusion pin, 7 - second screw plug (i.e., small screw plug); 8 - push rod, 9 - column screw, 10 - actuating rod front hole set, 11 - actuating rod rear set; 12 - cover tube; 13 - sealed switch machine main housing; 14 - gasket;

[0036] 101- cylindrical structure of the action rod, 102- oblique groove, 103- conical groove, 104- elliptical groove;

[0037] 201-square hole slot, 202-extrusion column mounting hole, 203-pin hole, 204-rod hole, 205-threaded hole; 206-first screw plug mounting hole;

[0038] 401- disc spring, 801- limiting groove, 802- cone surface of ejector rod;

[0039] 1001-first felt, 1002-dustproof ring, 1003-sealing ring, 1004-guide belt, 1005-first O-ring;

[0040] 1006-first oil filling screw, 1101-second felt, 1102-second O-ring, 1103-pad, 1104-rubber pad; 1105-second oil filling screw. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0045] See also Figures 1 to 9 The present invention provides a protective structure for a shear pin for a switch machine, comprising an operating rod 1, a rack block 2, a supporting plate 3, a shear column 4 and a shear pin 6;

[0046] The rack block 2 and the support plate 3 are installed on the outer side of the middle part of the action rod 1;

[0047] A support plate 3 is installed at the left and right ends of the bottom of the rack block 2;

[0048] A cutting pin 6 is provided on the upper part of the left and right ends of the rack block 2;

[0049] The lower portion of the extrusion pin 6 is inserted into the oval groove 104 at the upper end of the action rod 1;

[0050] The middle portion of the front bottom surface of the rack block 2 is connected to the rear end of a rack block forward protrusion 200;

[0051] The front end of the rack block protruding portion 200 has a vertical plate 2001, which is located in front of the rack block 2;

[0052] The left and right ends of the forward protruding portion 200 of the rack block are respectively provided with an extrusion column mounting hole 202;

[0053] Each extrusion column installation hole 202 is installed with an extrusion column 4;

[0054] The rear end of each extrusion column 4 extends backward into an oblique groove 102 on the front side of the middle portion of the actuating rod 1 and abuts against the oblique groove 102 .

[0055] In the present invention, in a specific implementation, the rear end of each extrusion column 4 is abutted against the oblique groove 102 on the action rod 1 through the elastic force of the disc spring 401 .

[0056] Specifically, the extrusion column 4 includes an extrusion column main column 41 and a hollow extrusion column outer shell 40 with an open front side;

[0057] A spring limiting column 42 is fixedly provided at the rear end of the inner cavity of the extrusion column outer shell 40;

[0058] The main column 41 of the extrusion column is inserted backward into the inner cavity of the outer shell 40 of the extrusion column;

[0059] The inner cavity of the extrusion column outer shell 40 is provided with a disc spring 401 (i.e., a disc spring, also known as a Belleville spring washer);

[0060] The front and rear ends of the disc spring 401 are connected to the spring limit column 42 and the rear side of the head of the extrusion column main column 41 respectively;

[0061] Furthermore, the extrusion column main column 41 is provided with a central through hole with a rear opening at a position corresponding to the spring limiting column 42;

[0062] It should be noted that the spring limiting column 42 can be inserted into the central through hole of the extrusion column main column 41 ; the spring limiting column 42 and the central through hole of the extrusion column main column 41 are clearance-matched.

[0063] Furthermore, the outer periphery of the extrusion column outer shell 40 is provided with external threads around the periphery;

[0064] The external thread on the extrusion column outer shell 40 is threadedly connected to the internal thread on the extrusion column mounting hole 202 .

[0065] Furthermore, the rear end of the extrusion column outer shell 40 in the extrusion column 4 abuts against the oblique groove 102 on the actuating rod 1 (through the elastic force of the disc spring 401 ).

[0066] In the present invention, in a specific implementation, a first screw plug mounting hole 206 is provided at the upper left and right ends of the forward protruding portion 200 of the rack block, at a position corresponding to each extrusion column mounting hole 202;

[0067] The first screw plug mounting hole 206 is threadedly connected with a first screw plug (i.e., a large screw plug) 5;

[0068] After the lower portion of the first screw plug (i.e., the large screw plug) 5 passes through the first screw plug mounting hole 206, it abuts against (i.e., comes into tight contact with) the upper side of the extrusion column 4 located in the extrusion column mounting hole 202;

[0069] In a specific implementation, the extrusion column mounting hole 202 is threadedly connected to the extrusion column 4 .

[0070] It should be noted that, in the present invention, the extrusion column 4 can be fastened and fixed by the first screw plug (i.e., the large screw plug) 5, so that the extrusion column 4 is screwed and fixed on the extrusion column mounting hole 202 at the front of the rack block 2;

[0071] It should be noted that, for the present invention, the extrusion column 4 is installed in the extrusion column mounting hole 202 of the forward protrusion 200 of the rack block, and is screwed and fixed to the extrusion column mounting hole 202 with a first screw plug 5. The rear end of the extrusion column 4 plays a limiting role in the two oblique grooves 102 extending into the side of the actuating rod 1. The extrusion column 4 is used to limit the actuating rod 1 to move simultaneously with the rack block 2 when the preset impact force value (that is, the standard force value mentioned above, which is the impact force required by the standard, for example, equal to 28kN) is below (including the preset impact force value). When the impact force value is greater than the preset impact force value (for example, 28kN), the actuating rod 1 and the rack block 2 move relative to each other, wherein the preset impact force value (for example, 28kN) is equal to the elastic force provided by the extrusion column 4, which can specifically be a backward elastic force of 28kN, provided by the disc spring 401 inside the extrusion column 4.

[0072] During the movement of the operating rod 1, the impact force exerted on the switch first acts on the extrusion column 4. When the impact force value exceeds the standard requirement (i.e. the preset impact force value), the force applied by the rear end of the extrusion column 4 to the two oblique grooves 102 on the side of the operating rod 1 is insufficient, and the position of the operating rod 1 can no longer be constrained. As a result, the operating rod 1 will be able to move laterally, and the impact force will act on the extrusion pin 6, thereby protecting the extrusion pin 6 from the phenomenon of "breaking without extrusion".

[0073] In other words, the design of the present invention ensures that only impact forces exceeding the standard requirement (i.e., the preset impact force value) can be applied to the shear pin 6. This allows the shear pin 6 to break according to its inherent characteristics when the force exceeds the standard requirement, allowing it to function normally, thereby protecting the train's safety and preventing damage to the track and switch. Furthermore, when the operating rod 1 is not subjected to an impact force exceeding the standard requirement (i.e., the preset impact force value), the operating rod 1 and the rack block 2 can operate simultaneously under the action of the shear column 4, ensuring the normal operation of the switch.

[0074] In the present invention, in a specific implementation, a pin hole 203 is provided at the upper portion of the left and right ends of the rack block 2;

[0075] A cutting pin 6 is provided at the lower inner portion of each pin hole 203;

[0076] After the extrusion pin 6 passes vertically through the pin hole 203, its lower part is inserted into the oval groove 104 at the upper end of the action rod 1;

[0077] The inner upper portion of each pin hole 203 is also threadedly connected to a second screw plug (i.e., a small screw plug) 7;

[0078] The bottom surface of the second screw plug (ie, the small screw plug) 7 abuts against the top of the extrusion pin 6 (ie, is tightly pressed against each other).

[0079] Furthermore, an annular washer 14 is provided between the bottom of the second screw plug (ie, the small screw plug) 7 and the top of the extrusion pin 6 .

[0080] It should be noted that, in the present invention, the extrusion pin 6 passes through the pin hole 203 on the rack block 2 and is then installed in the elliptical groove 104 of the actuating rod 1 , and is fastened to the rack block 2 with a second screw plug (i.e., a small screw plug) 7 .

[0081] Furthermore, the shape of the elliptical groove 104 is elliptical.

[0082] It should be noted that the extrusion pin 6 is installed in the pin hole 203 on the rack block 2, and is screwed to the pin hole 203 on the rack block 2 by a small screw plug 7 on the top. The lower part of the extrusion pin 6 is inserted into the elliptical groove 104 on the actuating rod 1 to ensure that the rack block 2 and the actuating rod 1 can move together under the standard force value (for example, 28kN). When the standard force value (for example, 28kN) is exceeded, the extrusion pin 6 will be squeezed off, so that the rack block 2 will not move with the actuating rod 1.

[0083] In the present invention, in a specific implementation, a push rod 8 is provided on the upper part of the left and right ends of the rack block 2;

[0084] The lower end of the push rod 8 is connected to the tapered groove 103 at the upper end of the actuating rod 1.

[0085] In specific implementation, a push rod hole 204 is provided at the left and right ends of the top of the rack block 2;

[0086] A push rod 8 is provided in each push rod hole 204;

[0087] The taper surface 802 at the lower end of the push rod 8 is installed in the tapered groove 103 at the upper end of the action rod 1;

[0088] The front left end and the rear right end of the rack block 2 are each provided with a threaded hole 205;

[0089] A column screw 9 is installed in each threaded hole 205 , and the column screw 9 extends into the limiting groove 801 on the head of the push rod 8 to limit the rotation of the push rod 8 in the push rod hole 204 .

[0090] Furthermore, the shape of the tapered groove 103 corresponds to the shape and size of the push rod tapered surface 802 at the lower end of the push rod 8.

[0091] In a specific implementation, the head of the push rod 8 is arranged downward.

[0092] It should be noted that, for the present invention, the push rod 8 is installed in the push rod hole 204 of the rack block 2, and the push rod conical surface 802 at the lower end of the push rod 8 is installed in the conical groove 103 at the upper end of the operating rod 1. When the switch occurs, the operating rod 1 and the rack block 2 are relatively displaced, and the push rod 8 is pushed out of the conical groove 103 on the operating rod 1 and moves vertically upward, thereby triggering the original switch component above it to take effect.

[0093] In the present invention, in a specific implementation, the middle portion of the action rod 1 is installed in the square hole groove 201 at the lower portion of the rack block 2; the bottom of the square hole groove 201 has a transversely distributed opening, so that the action rod 1 can be placed in the square hole groove 201;

[0094] Each support plate 3 is fixed to the bottom of the rack block 2 by two conical bolts and two hexagon socket bolts.

[0095] In the present invention, the specific implementation further includes: an action rod front set 10 and an action rod rear set 11;

[0096] The two ends of the action rod 1 are cylindrical structures 101;

[0097] The outer sides of the two cylindrical structures 101 are respectively installed with the front set of the action rod 10 and the rear set of the action rod 11;

[0098] The operating rod 1 passes horizontally through the external sealed switch machine main housing 13;

[0099] The actuating rod rear set 11 and the actuating rod front set 10 are respectively sealed and arranged on the left and right sides of the sealed switch machine main housing 13 .

[0100] In specific implementation, a hollow cover tube 12 is further provided on the outer side of one end of the action rod 1;

[0101] The cover tube 12 is connected to the actuating rod rear sleeve assembly 11 .

[0102] It should be noted that the cylindrical structures 101 at both ends of the operating rod 1 are symmetrical. This allows the operating rod 1 to be easily reinstalled without disassembly when the switch machine is repositioned (i.e., reversing). In the present invention, a sealed extrusion pin protective structure is installed on the sealed switch machine, and a sealed operating rod front sleeve 10, an operating rod rear sleeve 11, and a cover tube 12 are installed at both ends.

[0103] It should be noted that the front operating rod assembly 10 is installed at the protruding end of the operating rod of the switch machine; the rear operating rod assembly 11 is installed at the upper tail end of the machine and connected to the cover tube 12 to ensure the sealing of the internal structure of the machine.

[0104] In a specific implementation, a first through hole 100 is provided at the center of the actuating rod front sleeve assembly (i.e., the actuating rod front hole sleeve) 10;

[0105] The first through hole 100 is surrounded by inner sidewalls, which are arranged from left to right in sequence with a first felt 1001, a dust ring 1002, a sealing ring 1003 and a guide belt 1004;

[0106] Furthermore, a first O-ring seal 1005 is provided around the outer circumference of the middle portion of the actuating rod front sleeve assembly (i.e., the actuating rod front hole sleeve) 10;

[0107] A first oiling screw 1006 is provided at one end of the actuating rod front sleeve assembly (i.e., the actuating rod front hole sleeve) 10.

[0108] It should be noted that the first oil filling screw 1006 is threadedly disposed in the first oil filling hole of the actuating rod front sleeve 10, and the first oil filling hole is connected to the mounting groove where the first felt 1001 is located (the mounting groove is located on the inner side wall around the first through hole 100);

[0109] Furthermore, the first felt 1001 is located on one end surface (specifically, the right side wall) of the sealed switch machine main housing 13 ;

[0110] In specific implementation, a second through hole 110 is provided at the center of the rear sleeve 11 of the action rod;

[0111] The inner sidewalls of the second through hole 110 are surrounded by a rubber pad 1104, a pad 1103 and a second felt 1101 from right to left.

[0112] Furthermore, a second O-ring seal 1102 is provided around the outer circumference of the middle portion of the actuating rod rear sleeve 11 .

[0113] Furthermore, the rubber pad 1104 is located on the other end surface (specifically, the left side wall) of the sealed switch machine main housing 13 .

[0114] Furthermore, a second oiling screw 1105 is provided at one end of the actuating rod rear sleeve 11 .

[0115] It should be noted that the second oil filling screw 1105 is threadedly disposed in the second oil filling hole of the actuating rod rear set 11, and the second oil filling hole is connected to the mounting groove where the second felt 1101 is located (the mounting groove is located on the inner side wall around the second through hole 110);

[0116] It should be noted that the front sleeve of the operating rod (i.e. the front hole sleeve of the operating rod) 10 includes a first felt 1001, a dust ring 1002, a sealing ring 1003, a guide belt 1004, a first O-ring seal 1005 and a first oiling screw 1006; the rear sleeve of the operating rod 11 includes a second felt 1101, a second O-ring seal 1102, a pad 1103 and a rubber pad 1104 and a second oiling screw 1105, which can achieve good sealing performance and achieve the effect of sealing protection.

[0117] Based on the protective structure of the extrusion pin for the switch provided by the present invention, see Figure 9 The present invention also provides a switch machine, which includes the protective structure of the extrusion pin for the switch machine as described above.

[0118] In the present invention, in a specific implementation, the switch machine is a sealed switch machine;

[0119] The switch machine further comprises an actuating rod front set 10 and an actuating rod rear set 11;

[0120] The two ends of the action rod 1 are cylindrical structures 101;

[0121] The outer sides of the two cylindrical structures 101 are respectively installed with the front set of the action rod 10 and the rear set of the action rod 11;

[0122] The operating rod 1 passes through the sealed switch machine main housing 13 of the sealed switch machine in a transverse direction;

[0123] The actuating rod rear set 11 and the actuating rod front set 10 are respectively sealed and arranged on the left and right sides of the sealed switch machine main housing 13 .

[0124] Specifically, a driving gear 130 of a gear set (such as a reducer of a switch machine) is provided in the sealed switch machine main housing 13;

[0125] The driving gear 130 of the gear set (such as the reducer of the switch machine) is meshed with the teeth on the top of the rack block 2.

[0126] It should be noted that the driving gear 130 of the gear set (such as the reducer of the switch machine) is a common structure in the existing traditional sealed switch machine, and is linked to the switch machine motor in the switch machine. It is an existing well-known technology and will not be repeated here.

[0127] Compared with the prior art, the protective structure for the extrusion pin for a switch provided by the present invention has the following beneficial effects:

[0128] The present invention can be applied to sealed electric switch machines. While ensuring the sealing performance, the extrusion pins can be prevented from being directly subjected to external forces by installing extrusion columns, thereby solving the problem of "self-breaking without extrusion" of the extrusion pins during road use, reducing the workload of on-site maintenance of the extrusion pins, and reducing on-site maintenance costs.

[0129] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A protective structure for a shear pin used in a switch machine, characterized in that: It comprises an action rod (1), a rack block (2), a support plate (3), an extrusion column (4) and an extrusion pin (6); A rack block (2) and a support plate (3) are installed on the outer side of the middle portion of the action rod (1); A support plate (3) is installed at the left and right ends of the bottom of the rack block (2); A cutting pin (6) is provided on the upper portions of the left and right ends of the rack block (2); The lower portion of the extrusion pin (6) is inserted into the elliptical groove (104) at the upper end of the action rod (1); The middle portion of the bottom surface of the rack block (2) is connected to the rear end of a forward protruding portion (200) of the rack block; The front end of the forward protruding portion (200) of the rack block has a vertical plate (201), which is located in front of the rack block (2); The left and right ends of the forward protruding portion (200) of the rack block are respectively provided with an extrusion column mounting hole (202); An extrusion column (4) is installed in each extrusion column installation hole (202); The rear end of each extrusion column (4) extends backward into an oblique groove (102) on the front side of the middle part of the action rod (1) and abuts against the oblique groove (102).

2. The protective structure for the extrusion pin for a switch machine according to claim 1, characterized in that: The rear end of each extrusion column (4) is abutted against the oblique groove (102) on the action rod (1) by the elastic force of the disc spring (401); The extrusion column (4) comprises an extrusion column main column (41) and a hollow extrusion column outer shell (40) with an open front side; A spring limiting column (42) is fixedly provided at the rear end of the inner cavity of the extrusion column outer shell (40); The main column (41) of the extrusion column is inserted backward into the inner cavity of the outer shell (40) of the extrusion column; The inner cavity of the extrusion column outer shell (40) is provided with a disc spring (401); The front and rear ends of the disc spring (401) are respectively connected to the spring limiting column (42) and the rear side of the head of the extrusion column main column (41).

3. The protective structure for the extrusion pin for a switch machine according to claim 2, characterized in that: External threads are provided around the outer periphery of the extrusion column outer shell (40); The external thread on the extrusion column outer shell (40) is threadedly connected to the internal thread on the extrusion column mounting hole (202); The rear end of the extrusion column outer shell (40) in the extrusion column (4) abuts against the oblique groove (102) on the action rod (1).

4. The protective structure for the extrusion pin for a switch machine according to claim 1, characterized in that: A first screw plug mounting hole (206) is respectively provided at the upper left and right ends of the forward protruding portion (200) of the rack block, at a position corresponding to each extrusion column mounting hole (202); A first screw plug (5) is threadedly connected to the first screw plug mounting hole (206); After the lower portion of the first screw plug (5) passes through the first screw plug mounting hole (206), it abuts against the upper side of the extrusion column (4) located in the extrusion column mounting hole (202).

5. The protective structure for the extrusion pin for a switch machine according to claim 1, characterized in that: A pin hole (203) is provided on the upper portions of the left and right ends of the rack block (2); A cutting pin (6) is provided at the lower inner portion of each pin hole (203); After the extrusion pin (6) vertically passes through the pin hole (203), the lower portion of the extrusion pin (6) is inserted into the elliptical groove (104) at the upper end of the action rod (1).

6. The protective structure for the extrusion pin for a switch machine according to claim 5, characterized in that: The inner upper portion of each pin hole (203) is also threadedly connected to a second screw plug (7); The bottom surface of the second screw plug (7) abuts against the top of the extrusion pin (6); A circular washer (14) is provided between the bottom of the second screw plug (7) and the top of the extrusion pin (6).

7. The protective structure for the extrusion pin for a switch machine according to claim 1, characterized in that: A push rod (8) is provided on the upper part of the left and right ends of the rack block (2); The lower end of the push rod (8) is connected to the tapered groove (103) at the upper end of the action rod (1); A push rod hole (204) is provided at the left and right ends of the top of the rack block (2); A push rod (8) is provided in each push rod hole (204); The push rod conical surface (802) at the lower end of the push rod (8) is installed in the conical groove (103) at the upper end of the action rod (1); A threaded hole (205) is provided at the front left end and the rear right end of the rack block (2); A column tail screw (9) is installed in each threaded hole (205), and the column tail screw (9) extends into the limiting groove (801) of the head of the push rod (8).

8. The protective structure for the extrusion pin for a switch machine according to claim 1, characterized in that: The middle portion of the action rod (1) is installed in the square hole groove (201) at the lower portion of the rack block (2); The bottom of the square hole groove (201) has openings distributed laterally; Each support plate (3) is fixed to the bottom of the rack block (2) by two conical bolts and two hexagon socket bolts.

9. The protective structure for the extrusion pin for a switch machine according to any one of claims 1 to 8, characterized in that: Also includes: An action rod front set (10) and an action rod rear set (11); Both ends of the action rod (1) are cylindrical structures (101); The outer sides of the two cylindrical structures (101) are respectively installed with an action rod front set (10) and an action rod rear set (11); The operating rod (1) passes through the external sealed switch machine main housing (13) in a transverse direction; The actuating rod rear sleeve assembly (11) and the actuating rod front sleeve assembly (10) are respectively sealed and arranged on the left and right sides of the sealed switch machine main housing (13); A first through hole (100) is provided at the center of the actuating rod front sleeve (10) and is distributed transversely therethrough; The first through hole (100) is surrounded by inner side walls, which are arranged in sequence from left to right, with a first felt (1001), a dust ring (1002), a sealing ring (1003) and a guide belt (1004); A second through hole (110) is provided at the center of the actuating rod rear sleeve (11) and is distributed transversely therethrough; The inner side walls around the second through hole (110) are surrounded by a rubber pad (1104), a pad (1103) and a second felt (1101) in sequence from right to left.

10. A switch machine, characterized in that: A protective structure comprising the extrusion pin for a switch machine according to any one of claims 1 to 9.

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