A protection structure of a shearing pin for a switch machine and the switch machine
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TIANJIN RAILWAY SIGNAL CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-14
Smart Images
Figure CN224491082U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of railway turnout switching equipment, and in particular to a protective structure for a cutting pin for a switch machine and a switch machine. Background Technology
[0002] A switch machine is an important signaling infrastructure device used to reliably switch the position of a turnout, change the direction of the turnout, lock the turnout switch rail, and reflect the position and status of the turnout. It can effectively ensure traffic safety, improve transportation efficiency, and reduce the labor intensity of traffic operators.
[0003] To extend the service life of switch machines, sealed switch machines have emerged. Sealed switch machines are a new type of product that is an improvement and upgrade of the original switch machine. Their sealing performance directly affects the condition of the internal parts and the service life of the switch machine.
[0004] For sealed switch machines, the extrusion pin is a key safety component. It is mainly installed between the actuating rod and the rack block of the switch machine. Its core function is to protect the internal structure of the switch machine and the mechanical components of the turnout by breaking itself when the turnout encounters a derailment, thus preventing serious damage to the equipment due to overload.
[0005] The rack and pinion block is the core transmission component in a switch machine, primarily installed between the actuating rod and the gear set. Through mechanical cooperation with the actuating rod, the cutting pin, and other components, it transmits the switching force for the turnout. After the motor inside the switch machine starts, it converts rotary motion into linear motion through the gear set (such as the switch machine's reducer). The rack and pinion block meshes with the driving gear in the gear set, becoming the link in the power transmission. When the driving gear in the gear set rotates, it pushes the rack and pinion block to move horizontally. The rack and pinion block is rigidly connected to the actuating rod through the cutting pin. When the rack and pinion block moves, it drives the actuating rod to move synchronously, which in turn drives the switch point rail to switch.
[0006] The shear pin is a connecting pin used to connect the actuating rod and the rack block, ensuring that the actuating rod and the rack block move simultaneously. 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, so as to protect the safety of train operation and prevent damage to the track and switch machine.
[0007] However, due to the poor condition of the turnouts at present, when the sealed switch machine is locked, the passing of a train sometimes causes the actuating rod to exert repeated shearing force on the cutting pin. This force does not reach the standard value. After a period of repeated shearing, the cutting pin breaks even though the shearing force does not reach the standard value, a phenomenon known as "self-breakage without shearing." After the cutting pin breaks, the actuating rod and rack block cannot move relative to each other, resulting in the inability to transmit the mechanical energy of the sealed switch machine. The sealed switch machine can no longer pull the turnout through the actuating rod, thus losing its function and directly rendering the sealed switch machine ineffective, leading to turnout switching failures and affecting traffic safety.
[0008] In addition, as mentioned earlier, due to the phenomenon of the extrusion pin breaking off without being extruded, the extrusion pin on the sealed switch machine needs to be inspected and maintained regularly. This results in a large workload for the regular replacement of the extrusion pin at the railway site, which requires a lot of manpower and material resources, increasing the operation and maintenance cost of the sealed switch machine.
[0009] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content
[0010] The purpose of this utility model is to address the technical deficiencies of the existing technology by providing a protective structure for a cutting pin on a switch machine and a switch machine in general.
[0011] Therefore, this utility model provides a protective structure for a cutting pin for a switch machine, which includes an actuating rod, a rack block, a support plate, a disengagement column, and a cutting pin;
[0012] A rack block and a support plate are installed on the outer side of the middle part of the actuating lever;
[0013] A support plate is installed at each of the left and right ends of the bottom of the rack block;
[0014] A cutting pin is provided at the upper part of each of the left and right ends of the rack block;
[0015] The lower part of the cutting pin is inserted into the elliptical groove at the upper end of the actuating rod;
[0016] The bottom center of the rack block is connected to the rear end of the forward protrusion of a rack block;
[0017] The vertical plate at the front end of the forward protrusion of the rack block is located in front of the rack block;
[0018] At the left and right ends of the forward protrusion of the rack block, there is a push-out pin mounting hole;
[0019] One extrusion column is installed in each extrusion column mounting hole;
[0020] The rear end of each extrusion post extends backward into a slanted groove on the front side of the middle of the actuating rod and abuts against the slanted groove.
[0021] In addition, this utility model also provides a switch machine, which includes a protective structure for the switch machine extrusion pin as described above.
[0022] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a protective structure for the extrusion cutting pin of a switch machine and a switch machine. The design is scientific and can provide safety protection for the extrusion cutting pin, preventing the extrusion cutting pin from being broken even when the extrusion cutting force standard value is not reached. This ensures the normal functioning of the extrusion cutting pin and effectively avoids the phenomenon of the extrusion cutting pin breaking without being extruded. It has significant practical significance.
[0023] By applying this utility model, the original action tension transmission of the switch machine can be realized safely and reliably, ensuring the normal operation and sealing function of the sealed switch machine, as well as ensuring the normal operation of the extrusion pin.
[0024] After testing, the protective structure for the extrusion cutter pin of the switch machine provided by this utility model is a sealed electric switch machine extrusion cutter pin protective structure. When used in a sealed electric switch machine, it will not reduce the overall sealing protection level of the machine, while ensuring the normal operation of the extrusion cutter pin, eliminating the impact of the "self-breakage without extrusion" failure of the extrusion cutter pin caused by poor on-site turnout conditions, reducing on-site maintenance workload, and lowering maintenance costs. Attached Figure Description
[0025] Figure 1 Exploded view of the protective structure of the extrusion cutter for a switch machine provided by this utility model;
[0026] Figure 2 A separate assembly structure diagram of the protective structure for a cutting pin used in a switch machine, provided by this utility model;
[0027] Figure 3 A schematic diagram of an action rod with a special structure in one embodiment of a protective structure for a cutting pin of a switch machine provided by this utility model;
[0028] Figure 4 An enlarged view of the assembly of the rack block and two support plates in the protective structure of the extrusion cutter for a switch machine provided by this utility model;
[0029] Figure 5 A half-sectional view of the extrusion column in the protective structure of the extrusion pin for a switch machine provided by this utility model shows the disc spring inside the extrusion column and its internal and external structures.
[0030] Figure 6 An enlarged structural diagram of the top rod in the protective structure of the extrusion cutter pin for a switch machine provided by this utility model;
[0031] Figure 7 The enlarged cross-sectional view of the front hole sleeve of the actuating rod (i.e., the front sleeve assembly of the actuating rod) in the protective structure of the extrusion cutter for the switch machine provided by this utility model shows the composition of the sealing structure installed inside the front hole sleeve of the actuating rod.
[0032] Figure 8 The enlarged cross-sectional view of the rear sleeve of the actuating rod (i.e., the rear sleeve assembly of the actuating rod) in the protective structure of the extrusion cutter for the switch machine provided by this utility model shows the composition of the sealing structure installed inside the rear sleeve of the actuating rod.
[0033] Figure 9 A cross-sectional view of a protective structure for a cutting pin of a switch machine, provided by this utility model, installed on a sealed switch machine, to more intuitively show the assembly of the protective structure for the cutting pin of a sealed switch machine.
[0034] In the diagram, 1-acting lever, 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-Pin tail screw; 10-Actuating rod front hole sleeve; 11-Actuating rod rear sleeve; 12-Cover; 13-Sealed switch machine main housing; 14-Washer;
[0036] 101-Cylindrical structure of the actuator, 102-Slanted groove, 103-Conical groove, 104-Elliptical groove;
[0037] 201-Square hole groove; 202-Extrusion pin mounting hole; 203-Pin hole; 204-Push rod hole; 205-Threaded hole; 206-First screw plug mounting hole;
[0038] 401-Disc spring, 801-Limit groove, 802-Push rod conical surface;
[0039] 1001-First felt, 1002-Dustproof ring, 1003-Sealing ring, 1004-Guide belt, 1005-First O-ring seal;
[0040] 1006 - First oil filler screw, 1101 - Second felt, 1102 - Second O-ring seal, 1103 - Gasket, 1104 - Rubber gasket; 1105 - Second oil filler screw. Detailed Implementation
[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0042] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0043] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0045] See Figures 1 to 9 This utility model provides a protective structure for a cutting pin for a switch machine, including an actuating rod 1, a rack block 2, a support plate 3, a disengagement column 4, and a cutting pin 6;
[0046] A rack block 2 and a support plate 3 are installed on the outer side of the middle part of the actuating lever 1;
[0047] A support plate 3 is installed at each of the left and right ends of the bottom of the rack block 2;
[0048] A cutting pin 6 is provided at the upper part of both the left and right ends of the rack block 2;
[0049] The lower part of the cutting pin 6 is inserted into the elliptical groove 104 at the upper end of the actuating rod 1;
[0050] The middle of the front bottom surface of rack block 2 is connected to the rear end of a forward protrusion 200 of rack block;
[0051] The vertical plate 2001 at the front end of the forward protrusion 200 of the rack block is located in front of the rack block 2;
[0052] At the left and right ends of the forward protrusion 200 of the rack block, there is a push-out column mounting hole 202 respectively;
[0053] One extrusion column 4 is installed in each extrusion column mounting hole 202;
[0054] The rear end of each extrusion post 4 extends backward into a slanted groove 102 on the front side of the middle part of the actuating rod 1, and abuts against the slanted groove 102.
[0055] In this invention, specifically, the rear end of each ejection column 4 abuts against the inclined groove 102 on the actuating rod 1 through the elastic force of the disc spring 401.
[0056] In specific implementation, the extrusion column 4 includes the main extrusion column body 41 and the hollow, front-opening extrusion column outer shell body 40.
[0057] A spring limiting post 42 is fixedly installed at the rear end of the inner cavity of the extrusion column housing 40;
[0058] The main column 41 of the extrusion column is inserted rearward into the inner cavity of the outer shell 40 of the extrusion column;
[0059] The inner cavity of the extrusion column housing 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 respectively connected to the spring limiting post 42 and the rear side of the head of the extrusion post main column 41;
[0061] Furthermore, the main column 41 of the extrusion column 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 post 42 can be inserted into the central through hole of the main body 41 of the ejection post; the spring limiting post 42 and the central through hole of the main body 41 of the ejection post are in clearance fit.
[0063] Furthermore, external threads are provided around the outer periphery of the extrusion column housing 40;
[0064] The external thread on the outer shell 40 of the extrusion column is threadedly connected to the internal thread on the mounting hole 202 of the extrusion column.
[0065] Furthermore, the rear end of the extrusion column housing 40 in the extrusion column 4 abuts against the inclined groove 102 on the actuating rod 1 (through the elastic force of the disc spring 401).
[0066] In this utility model, specifically, at the upper left and right ends of the forward protrusion 200 of the rack block, a first screw plug mounting hole 206 is provided at a position corresponding to each extrusion post mounting hole 202;
[0067] The first screw plug (i.e., the large screw plug) 5 is threadedly connected to the first screw plug mounting hole 206;
[0068] After the lower part of the first screw plug (i.e. the large 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 (i.e., they are in tight contact).
[0069] In practice, the mounting hole 202 of the extrusion column is threadedly connected to the extrusion column 4.
[0070] It should be noted that, for this utility model, the first screw plug (i.e. the large screw plug) 5 can be used to fasten and fix the extrusion column 4, 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 this utility model, the ejector pin 4 is installed in the ejector pin mounting hole 202 of the forward protrusion 200 of the rack block, and is tightened and fixed on the ejector pin mounting hole 202 with the first screw plug 5. The rear end of the ejector pin 4 plays a limiting role in the two inclined grooves 102 that extend into the side of the actuating rod 1. The ejector pin 4 is used to limit the actuating rod 1 to move simultaneously with the rack block 2 when the preset impact force value (i.e., the standard force value mentioned above, which is the standard required impact force, for example, equal to 28kN) is below (including the preset impact force value), and 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. The preset impact force value (for example, 28kN) is equal to the elastic force provided by the ejector pin 4, which can be a backward elastic force of 28kN, provided by the disc spring 401 inside the ejector pin 4.
[0072] During the operation of the action rod 1, the impact force on the switch machine first acts on the extrusion column 4. When the impact force 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 inclined grooves 102 on the side of the action rod 1 is insufficient, and it can no longer constrain the position of the action rod 1. As a result, the action rod 1 will be able to move laterally, and the impact force will then act on the extrusion cutting pin 6, thereby protecting the extrusion cutting pin 6 from the phenomenon of "self-breakage without extrusion".
[0073] In other words, through the design of this utility model, only impact forces exceeding the standard requirements (i.e., the preset impact force value) can be applied to the cutting pin 6. This allows the cutting pin 6 to break according to its own characteristics when the standard force value is exceeded, thus enabling it to function normally and protect the train's safety and prevent damage to the track and switch machine. Furthermore, when the actuating rod 1 is not subjected to an impact force exceeding the standard requirements (i.e., the preset impact force value), under the action of the release column 4, the actuating rod 1 and the rack block 2 can operate simultaneously, ensuring the normal operation of the switch machine.
[0074] In this utility model, specifically, a pin hole 203 is provided at the upper part of both the left and right ends of the rack block 2;
[0075] Each pin hole 203 has a cutting pin 6 located on the lower inner side;
[0076] After the extrusion pin 6 passes vertically through the pin hole 203, its lower part is inserted into the elliptical groove 104 at the upper end of the actuating rod 1.
[0077] The upper inner side 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 (i.e., the small screw plug) 7 abuts against the top of the extrusion pin 6 (i.e., they are tightly pressed together).
[0079] Furthermore, an annular washer 14 is provided between the bottom of the second screw plug (i.e., the small screw plug) 7 and the top of the extrusion pin 6.
[0080] It should be noted that, for this utility model, 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 the extrusion pin 6 is fastened to the rack block 2 with the second screw plug (i.e., the small screw plug) 7.
[0081] Furthermore, the elliptical groove 104 is elliptical in shape.
[0082] It should be noted that the extrusion pin 6 is installed in the pin hole 203 on the rack block 2, and the upper part is tightened into the pin hole 203 on the rack block 2 by a small screw plug 7. The lower part of the extrusion pin 6 is inserted into the elliptical groove 104 on the actuating rod 1, ensuring that the rack block 2 and the actuating rod 1 can move together under the standard force value (e.g., 28kN). If the standard force value (e.g., 28kN) is exceeded, the extrusion pin 6 will be broken, so that the rack block 2 will not move with the actuating rod 1.
[0083] In this utility model, specifically, a push rod 8 is provided at 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 top left and right ends of the rack block 2;
[0086] Each push rod hole 204 is provided with a push rod 8;
[0087] The push rod cone surface 802 at the lower end of the push rod 8 is installed in the cone groove 103 at the upper end of the actuating rod 1;
[0088] A threaded hole 205 is provided at the front left end and the rear right end of the rack block 2;
[0089] Each threaded hole 205 is fitted with a tail screw 9, which extends into the limiting groove 801 of the head of the push rod 8 to limit the rotation of the push rod 8 within the push rod hole 204.
[0090] Furthermore, the shape of the conical groove 103 corresponds to and matches the shape and size of the cone surface 802 of the push rod at the lower end of the push rod 8.
[0091] In practice, the head of the push rod 8 is positioned downwards.
[0092] It should be noted that, in this utility model, the push rod 8 is installed in the push rod hole 204 of the rack block 2, and the push rod cone surface 802 at the lower end of the push rod 8 is installed in the cone groove 103 at the upper end of the actuating rod 1. When a derailment occurs, the actuating rod 1 and the rack block 2 are relatively displaced, and the push rod 8 is pushed out of the cone groove 103 on the actuating rod 1 and moves vertically upward, thereby triggering the original switch of the switch machine component above it to function.
[0093] In this utility model, specifically, the middle part of the actuating rod 1 is installed in the square hole groove 201 at the lower part of the rack block 2; the bottom of the square hole groove 201 has horizontally distributed openings, so that the actuating rod 1 can be inserted into the square hole groove 201.
[0094] Each tray 3 is fixed to the bottom of the rack block 2 by two tapered bolts and two hex bolts.
[0095] In this utility model, in a specific implementation, it also includes: a front sleeve 10 for the action lever and a rear sleeve 11 for the action lever;
[0096] The two ends of the actuating lever 1 are cylindrical structures 101;
[0097] On the outer sides of the two cylindrical structures 101, a front sleeve 10 and a rear sleeve 11 of the action rod are respectively installed.
[0098] The actuating lever 1 extends laterally through the external sealed main housing 13 of the switch machine;
[0099] The rear sleeve 11 and the front sleeve 10 of the actuating rod are respectively sealed on the left and right sides of the main housing 13 of the sealed switch machine.
[0100] In practice, a hollow cover 12 is provided on the outer side of one end of the actuating lever 1;
[0101] The cover 12 is connected to the rear sleeve 11 of the actuating rod.
[0102] It should be noted that the cylindrical structures 101 at both ends of the actuating rod 1 are symmetrical, so that the actuating rod 1 does not need to be disassembled when the extension direction of the switch machine is changed on site (i.e., the reversing process), which is convenient for reversing. For this utility model, the protective structure of the sealed extrusion pin is installed on the sealed switch machine, and the front sleeve 10 and the rear sleeve 11 of the actuating rod with sealing structures and the cover 12 are installed at both ends.
[0103] It should be noted that the front sleeve 10 of the action rod is installed at the extended end of the action rod of the switch machine; the rear sleeve 11 of the action rod is installed at the upper tail end of the machine and is connected to the cover 12 to ensure the sealing of the internal structure.
[0104] In specific implementation, a first through hole 100 is provided at the center of the front sleeve assembly of the action rod (i.e., the front hole sleeve of the action rod) 10;
[0105] The inner walls of the first through hole 100 are provided with a first felt 1001, a dustproof ring 1002, a sealing ring 1003 and a guide belt 1004 in sequence from left to right.
[0106] Furthermore, a first O-ring seal 1005 is provided around the middle circumferentially outside the front sleeve assembly of the actuator (i.e., the front hole sleeve of the actuator) 10.
[0107] A first oiling screw 1006 is provided at one end of the front sleeve assembly of the actuator rod (i.e., the front hole sleeve of the actuator rod).
[0108] It should be noted that the first oiling screw 1006 is threaded into the first oiling hole of the front sleeve 10 of the actuating rod, and the first oiling 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 at one end face (specifically the right side wall) facing the sealed main housing 13 of the sealed switch machine;
[0110] In specific implementation, a second through hole 110 is provided at the center of the rear sleeve 11 of the actuating lever;
[0111] The inner sidewalls of the second through hole 110 are provided with a rubber pad 1104, a pad plate 1103 and a second felt 1101 in sequence from right to left.
[0112] Furthermore, a second O-type seal 1102 is provided around the middle circumferential outer side of the actuating lever rear sleeve 11.
[0113] Furthermore, the rubber pad 1104 is located on the other end face (specifically the left side wall) facing the sealed main housing 13 of the sealed switch machine;
[0114] Furthermore, a second oiling screw 1105 is provided at one end of the actuating lever rear sleeve 11.
[0115] It should be noted that the second oiling screw 1105 is threaded into the second oiling hole of the actuating rod rear sleeve 11, and the second oiling 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 assembly of the actuator (i.e., the front hole sleeve of the actuator) 10 includes a first felt 1001, a dustproof 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 assembly of the actuator 11 includes a second felt 1101, a second O-ring seal 1102, a pad 1103, a rubber pad 1104, and a second oiling screw 1105, which can achieve good sealing performance and achieve the function of sealing and protection.
[0117] Based on the protective structure for the extrusion cutter pin of the switch machine provided by this utility model, see [link to relevant documentation]. Figure 9 This utility model also provides a switch machine, which includes a protective structure for the switch machine extrusion pin as described above.
[0118] In this utility model, specifically, the switch machine is a sealed switch machine;
[0119] The switch machine also includes a front sleeve 10 and a rear sleeve 11 for the operating lever;
[0120] The two ends of the actuating lever 1 are cylindrical structures 101;
[0121] On the outer sides of the two cylindrical structures 101, a front sleeve 10 and a rear sleeve 11 of the action rod are respectively installed.
[0122] The actuating lever 1 extends laterally through the sealed main housing 13 of the sealed switch machine;
[0123] The rear sleeve 11 and the front sleeve 10 of the actuating rod are respectively sealed on the left and right sides of the main housing 13 of the sealed switch machine.
[0124] In practice, the main housing 13 of the sealed switch machine is equipped with a drive gear 130 of a gear set (such as the reducer of the switch machine);
[0125] The drive gear 130 of the gear set (such as the reducer of a switch machine) meshes with the teeth on the top of the rack block 2.
[0126] It should be noted that the drive gear 130 of the gear set (such as the reducer of the switch machine) is a common structure in existing traditional sealed switch machines. It is linked with the switch machine motor inside the switch machine and is a well-known technology, so it will not be described in detail here.
[0127] Compared with the prior art, the protective structure for the extrusion cutter pin of the switch machine provided by this utility model has the following beneficial effects:
[0128] This invention is applicable to sealed electric switch machines. While ensuring sealing performance, it avoids the extrusion pin being directly subjected to external force by installing the extrusion column, thus solving the problem of "self-breakage without extrusion" of the extrusion pin during track use. This reduces the workload of on-site maintenance of the extrusion pin and lowers on-site maintenance costs.
[0129] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A protective structure for a cutting pin in a switch machine, characterized in that, It includes an action lever (1), a rack block (2), a support plate (3), a detachment column (4), and a cutting pin (6); A rack block (2) and a support plate (3) are installed on the outer side of the middle part of the actuating lever (1); At the bottom left and right ends of the rack block (2), a support plate (3) is installed respectively; A cutting pin (6) is provided at the upper part of the left and right ends of the rack block (2); The lower part of the cutting pin (6) is inserted into the elliptical groove (104) at the upper end of the actuating rod (1); The bottom center of the rack block (2) is connected to the rear end of a rack block forward protrusion (200); The vertical plate (2001) at the front end of the forward protrusion (200) of the rack block is located in front of the rack block (2); At the left and right ends of the forward protrusion (200) of the rack block, there is a push-out column mounting hole (202); One extrusion column (4) is installed in each extrusion column mounting hole (202); The rear end of each extrusion post (4) extends backward into a slanted groove (102) on the front side of the middle part of the action rod (1) and abuts against the slanted groove (102).
2. The protective structure for the extrusion cutter pin of the switch machine as described in claim 1, characterized in that, The rear end of each extrusion column (4) abuts against the inclined groove (102) on the actuating rod (1) through the elastic force of the disc spring (401); The extrusion column (4) includes the main body of the extrusion column (41) and the hollow, front-opening outer shell of the extrusion column (40); A spring limiting post (42) is fixedly installed at the rear end of the inner cavity of the extrusion column housing (40); The main body (41) of the extrusion column is inserted rearward into the inner cavity of the outer shell (40) of the extrusion column; A disc spring (401) is provided inside the outer cavity of the extrusion column housing (40); The front and rear ends of the disc spring (401) are respectively connected to the rear side of the head of the spring limiting post (42) and the main body of the extrusion post (41).
3. The protective structure for the extrusion cutter pin of the switch machine as described in claim 2, characterized in that, The outer periphery of the extrusion column housing (40) is provided with external threads; The external thread on the outer shell (40) of the extrusion column is threadedly connected to the internal thread on the mounting hole (202) of the extrusion column; The rear end of the extrusion column housing (40) in the extrusion column (4) abuts against the inclined groove (102) on the actuating rod (1).
4. The protective structure for the extrusion cutter pin of the switch machine as described in claim 1, characterized in that, At the upper left and right ends of the forward protrusion (200) of the rack block, a first screw plug mounting hole (206) is provided at a position corresponding to each extrusion post mounting hole (202); The first screw plug (5) is threadedly connected to the first screw plug mounting hole (206); After the lower part 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 cutter pin of the switch machine as described in claim 1, characterized in that, A pin hole (203) is provided at the upper part of the left and right ends of the rack block (2); Each pin hole (203) has a cutting pin (6) on the lower inner side; After the cutting pin (6) passes vertically through the pin hole (203), its lower part is inserted into the elliptical groove (104) at the upper end of the actuating rod (1).
6. The protective structure for the extrusion cutter pin of the switch machine as described in claim 5, characterized in that, The upper inner side 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); An annular 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 of the switch machine as described in claim 1, characterized in that, A push rod (8) is provided at the upper part of the left and right ends of the rack block (2); The lower end of the push rod (8) is aligned with the tapered groove (103) at the upper end of the actuating rod (1); A top rod hole (204) is provided at each of the left and right ends of the top of the rack block (2); Each push rod hole (204) is provided with a push rod (8); The push rod cone surface (802) at the lower end of the push rod (8) is installed in the conical groove (103) at the upper end of the actuating rod (1); A threaded hole (205) is provided at the front left end and the rear right end of the rack block (2); Each threaded hole (205) is fitted with a stud screw (9), and the stud screw (9) extends into the limiting groove (801) of the head of the push rod (8).
8. The protective structure for the extrusion pin of a switch machine as described in any one of claims 1 to 7, characterized in that, The middle part of the actuating lever (1) is installed in the square hole groove (201) at the lower part of the rack block (2); The bottom of the square hole groove (201) has horizontally distributed openings; Each tray (3) is fixed to the bottom of the rack block (2) by two tapered bolts and two internal hex bolts.
9. The protective structure for the extrusion pin of a switch machine as described in any one of claims 1 to 8, characterized in that, Also includes: The front sleeve of the action lever (10) and the rear sleeve of the action lever (11); The two ends of the actuating lever (1) are cylindrical structures (101); On the outer sides of the two cylindrical structures (101), a front sleeve (10) and a rear sleeve (11) of the action rod are respectively installed; The actuating lever (1) passes laterally through the external sealed main housing (13) of the switch machine; The rear sleeve (11) and the front sleeve (10) of the actuating rod are respectively sealed on the left and right sides of the main housing (13) of the sealed switch machine; At the center of the front sleeve of the action lever (10), there is a first through hole (100) distributed laterally; The inner walls of the first through hole (100) are provided with a first felt (1001), a dustproof ring (1002), a sealing ring (1003) and a guide strip (1004) in sequence from left to right. A second through hole (110) is provided at the center of the rear sleeve of the actuating lever (11); The inner walls of the second through hole (110) are provided with a rubber pad (1104), a pad plate (1103), and a second felt (1101) in sequence from right to left.
10. A switch machine, characterized in that, The protective structure includes the extrusion cutter pin for the switch machine as described in any one of claims 1 to 9.