Safety switch mechanism and switch machine

Abstract

The invention discloses a safety switch mechanism and a switch machine. The safety switch mechanism comprises a manual rod; the front end of the manual rod is pivoted with a front side panel of the switch machine lower shell; the manual rod is also connected with the movable plug frame; a movable plug is arranged on the top surface of the movable plug frame; the bottom surface of the top support plate of the movable plug rack is connected with the right end of the fixed plate; the other end of the fixing plate is hinged with the right end of the connecting rod; the left end of the connecting rod is hinged with the lower end of the connecting plate; a gear box hand-cranking shaft arranged on the front side of an original motor reducer gear box in the switch machine lower shell is located behind the connecting plate. The right side of the movable plug rack is provided with a static plug rack. A static plug is arranged on the static plug rack; and a movable plug at the top of the movable plug rack corresponds to a static plug at the upper part of the static plug rack. According to the invention, the limiting mechanism is designed, so that the movable plug rack can be effectively limited during rotation, and original contact seats in the movable plug switch machine are prevented from being in contact.

Description

Technical Field

[0001] The invention relates to the technical field of turnout switching equipment, in particular to a safety switch mechanism and a switch machine. Background Art

[0002] A switch machine 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 of switches. It can well ensure driving safety, improve transportation efficiency, and improve the labor intensity of drivers.

[0003] At present, for the ZD(J)9 type switch machine produced by Tianjin Railway Signal Co., Ltd., the safety switch installed in it is equivalent to the switch in the circuit. The safety switch is connected in series in the control circuit of the ZD(J)9 type switch machine (i.e. the switch machine action circuit). When the power is turned on to operate the switch, the internal circuit of the switch machine (i.e. the switch machine action circuit) is connected, thereby driving the motor to rotate, and the switch machine pulls the switch.

[0004] When the safety switch of the switch machine is disconnected, the action circuit on the switch machine cannot be connected, ensuring that the switch machine cannot operate. At the same time, the original moving plug rack (i.e., the moving plug group) on the safety switch rotates, thereby driving the connecting plate on the safety switch connected to it to rotate. Since the connecting plate was previously in a state of blocking the rotation of the hand-cranked shaft of the gear box on the reducer of the switch machine, after the connecting plate rotates, the connecting plate cancels the blocking of the hand-cranked shaft of the gear box of the motor reducer in the switch machine, so that in the case of power failure, the staff can connect the hand-cranked shaft of the gear box of the motor reducer in the switch machine through the hand-cranked tool matching the switch machine, and rotate the hand remote control tool to manually operate the switch machine and control the switch machine to pull the turnout.

[0005] However, during use, the existing safety switch design has a movable plug rack (i.e., movable plug group) thereon that cannot be limited when rotating. As a result, the movable plug (i.e., movable contact) arranged on the top of the movable plug rack is prone to opening at too large an angle when rotating counterclockwise (for example, the angle between the vertical center axis of the movable plug and the horizontal plane is greater than 90°), causing the movable plug (i.e., movable contact) to collide with an original contact seat in a switch machine located on the rotation trajectory of the movable plug (for example, to the left of the movable plug rack) and adjacent to the safety switch, resulting in the movable contact (i.e., movable plug) being damaged due to frequent collisions.

[0006] Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Summary of the invention

[0007] The purpose of the present invention is to provide a safety switch mechanism and a switch machine in view of the technical defects in the prior art.

[0008] To this end, the present invention provides a safety switch mechanism, which includes: a manual rod, a movable plug frame, a movable plug, a connecting rod, a connecting plate, a static plug frame, a static plug and a fixed plate;

[0009] The front end of the manual lever is pivotally connected to the front side panel of the lower housing of the switch machine located outside;

[0010] The manual lever is also connected to the movable plug frame;

[0011] The connection position of the movable plug frame and the manual lever is located at the rear side of the front side panel of the lower housing of the switch machine;

[0012] The top surface of the top support plate of the movable plug rack is provided with a movable plug;

[0013] The bottom surface of the top support plate of the movable plug frame is connected to the right end of the fixed plate;

[0014] The other end of the fixed plate is hinged to the right end of the connecting rod;

[0015] Wherein, the left end of the connecting rod is hinged to the lower end of the connecting plate;

[0016] The gear box hand-crank shaft arranged on the front side of the original motor reducer gear box in the lower housing of the switch machine is located behind the connecting plate;

[0017] Among them, a static plug rack is arranged on the right side of the moving plug rack;

[0018] A static plug is arranged on the upper part of the static plug rack;

[0019] Wherein, the moving plug at the top of the moving plug rack is arranged correspondingly to the static plug at the top of the static plug rack;

[0020] The static plug rack is provided with a structure for limiting the rotation angle of the dynamic plug rack.

[0021] In addition, the present invention also provides a switch machine, which includes the safety switch mechanism as described above, and a switch machine lower housing;

[0022] The front end of the manual lever is pivotally connected to the front side panel of the lower housing of the switch machine.

[0023] It can be seen from the technical solution provided by the present invention that, compared with the prior art, the present invention provides a safety switch mechanism and a switch machine, which have a scientific structural design and a limiting mechanism, so that the movable plug frame can be effectively limited when rotating, thereby avoiding the movable plug (i.e., the movable contact) arranged on the top of the movable plug frame from having a problem of too large an opening angle (e.g., an angle greater than 90° with the horizontal plane) when rotating (e.g., counterclockwise rotation), thereby avoiding causing the movable plug (i.e., the movable contact) to collide with the original contact seat in the switch machine located on the rotation trajectory of the movable plug (e.g., on the left side of the movable plug frame) and adjacent to the safety switch, thereby avoiding the problem of the movable contact (i.e., the movable plug) being damaged due to frequent collisions, which has great practical significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1a A front view of a safety switch mechanism provided by the present invention when in an on state;

[0025] Figure 1b A top view of a safety switch mechanism provided by the present invention when in an on state, in which the moving plug frame and the moving plug as well as the stationary plug frame and the stationary plug are omitted;

[0026] Figure 1c A left side view of a safety switch mechanism provided by the present invention when in an on state;

[0027] Figure 1d A schematic diagram of the stereoscopic three-dimensional structure of a moving plug rack, a static plug rack and the surrounding area when a safety switch mechanism provided by the present invention is in an on state;

[0028] Figure 2a A front view of a safety switch mechanism provided by the present invention when in an off state;

[0029] Figure 2b A schematic diagram of the stereoscopic three-dimensional structure of a movable plug rack, a static plug rack and the surrounding area when a safety switch mechanism provided by the present invention is in an off state;

[0030] Figure 3a , Figure 3b They are the front view and top view of the manual lever respectively;

[0031] Figures 4a to 4c They are respectively the main view (i.e., the front view), the top view, and the left view of the movable plug frame;

[0032] Figure 5a to Figure 5c They are respectively the main view (i.e., the front view), the top view, and the left view of the moving plug;

[0033] Figure 6 : Front view of connecting rod;

[0034] Figure 7 : The main view of the connecting plate;

[0035] Figure 8a : The front view of the static plug rack;

[0036] Figure 8b : Schematic diagram of the three-dimensional structure of the static plug rack;

[0037] Fig. 9 : Main view of the static plug;

[0038] Figure 10: the front view, top view and left view of the fixing plate;

[0039] 1. Manual lever; 2. Moving plug rack; 3. Moving plug; 4. Connecting rod; 5. Connecting plate;

[0040] 6. Static plug rack; 7. Static plug; 8. Fixing plate; 9. Front side panel; 10. Fastening nut; 11. Gasket. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are 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 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, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] See also Figure 1a to Figure 1d , Figure 2a to Figure 2b , Figure 3a to Figure 3b , Figures 4a to 4c , Figure 5a to Figure 5c , Figure 6 to Figure 7 , Figure 8a to Figure 8b , Fig. 9 , Figures 10a to 10c The present invention provides a safety switch mechanism, comprising: a manual rod 1, a movable plug frame 2, a movable plug 3, a connecting rod 4, a connecting plate 5, a static plug frame 6, a static plug 7 and a fixed plate 8;

[0046] The front end of the manual lever 1 is pivotally connected (i.e., rotatably connected) to the front side panel 9 of the lower housing of the switch machine located outside;

[0047] The manual rod 1 is also connected to the movable plug frame 2 (e.g., plugged in);

[0048] The connection position between the movable plug frame 2 and the manual lever 1 is located at the rear side of the front side panel 9 of the lower housing of the switch machine;

[0049] The top surface of the top support plate 202 of the dynamic plug frame 2 is provided with a dynamic plug 3;

[0050] The bottom surface of the top support plate 202 of the movable plug frame 2 is connected (fixedly connected) to the right end of the fixed plate 8;

[0051] The other end of the fixed plate 8 is hinged to the right end of the connecting rod 4 (i.e., connected so as to be relatively rotatable);

[0052] The left end of the connecting rod 4 is hinged to the lower end of the connecting plate 5 (i.e., connected so as to be relatively rotatable);

[0053] The gear box hand-crank shaft 120 provided at the front side of the original motor reducer gear box 12 in the lower housing of the switch machine is located behind the connecting plate 5;

[0054] Among them, a static plug rack 6 is arranged on the right side of the dynamic plug rack 2;

[0055] A static plug 7 is arranged on the upper part of the static plug frame 6;

[0056] Among them, the moving plug 3 on the top of the moving plug rack 2 is arranged corresponding to the static plug 7 on the top of the static plug rack 6;

[0057] The movable plug 3 is used to contact (i.e. make contact) with the static plug 7 on the upper part of the static plug rack 6 when the movable plug rack 2 rotates clockwise under the control of the manual rod 1, and to break contact with the static plug 7 on the upper part of the static plug rack 6 when the movable plug rack 2 rotates counterclockwise;

[0058] The stationary plug rack 6 is provided with a structure for limiting the rotation angle of the movable plug rack 2 .

[0059] In the present invention, in a specific implementation, the safety switch mechanism is connected in series to the original switch machine action circuit on the switch machine;

[0060] The safety switch mechanism controls the on-off of the original switch machine action circuit on the switch machine by controlling whether the moving plug 3 is in contact with the static plug 7 (specifically, it controls whether the moving plug 3 is inserted into the static contact piece 70 on the static plug 7, the shape of the static contact piece 70 is similar to a Y shape, and whether it is inserted into the opening part of the Y-shaped static contact piece 70, thereby controlling the on-off of the original switch machine action circuit on the switch machine).

[0061] It should be noted that the lower shell of the switch machine used to install the motor reducer, safety switch and other equipment in the switch machine is a hollow shell with an open top. The overall shape can be similar to a cube. Panels are arranged around the lower shell of the switch machine, and the front side of the lower shell of the switch machine has a front side panel 9.

[0062] It should be noted that, at present, when the existing electric switch machines such as the ZD(J)9 model switch machine produced by Tianjin Railway Signal Co., Ltd. are manually operated, it is necessary to manually disconnect the safety switch of the switch machine first, and then use the hand crank to connect the gear box hand crank shaft 120 on the original motor reducer gear box 12 in the switch machine, and then perform the manual operation (the purpose is to drive the electric switch machine reducer so that the switch machine can change the switch position). After the operation is completed and the hand crank is removed, the safety switch needs to be manually restored. The safety switch of the switch machine is connected in series in the switch machine action circuit. After the safety switch is disconnected, the switch machine cannot be operated even if it is powered on by mistake in the control room. This personal protection scheme effectively protects the personal safety of railway operators and is widely used in the railway signal industry.

[0063] It should be noted that the safety switch mechanism designed by the present invention is used to replace the original safety switch in the existing electric switch machine such as the ZD(J)9 model switch machine produced by Tianjin Railway Signal Co., Ltd. The original safety switch in the existing switch machine also has a moving plug rack, a moving plug, a static plug rack and a static plug, and controls the on and off of the original switch machine action circuit of the switch machine by controlling whether the moving plug and the static plug are in conductive contact (i.e., connected). The working principle of the safety switch mechanism of the present invention affecting the switch machine action circuit, and the coordination between the various mechanisms on the switch machine, are the same as the working principle of the original safety switch in the existing switch machine, and will not be repeated here.

[0064] In the present invention, in a specific implementation, when the dynamic plug 3 is connected to the static plug 7 (i.e., the static contact piece 70 on the static plug 7 is inserted), the connecting plate 5 (i.e., the baffle) is located between the gear box hand-crank shaft 120 on the original motor reducer gear box 12 in the switch machine and the hand-crank hole on the original switch machine cover of the switch machine (located directly in front of the gear box hand-crank shaft 120), that is, the gear box hand-crank shaft on the motor reducer is blocked at this time, so that the staff cannot manually switch the switch machine through external hand-crank tools such as hand-crank handles;

[0065] The hand-crank hole on the original switch machine cover of the switch machine is located directly in front of the gear box hand-crank shaft 120 on the original motor reducer gear box 12 in the switch machine;

[0066] In the present invention, in specific implementation, when the manual rod 1 is rotated counterclockwise, the movable plug frame 2 and the movable plug 3 on the movable plug frame 2 are driven to rotate counterclockwise, the fixed plate 8 and the connecting rod 4 drive the connecting plate 5 (i.e., the baffle) to rotate clockwise, and the connecting plate 5 (i.e., the baffle) is separated from the previous position, and the connecting plate 5 (i.e., the baffle) is no longer located between the gear box hand-crank shaft 120 on the original motor reducer gear box 12 in the switch machine and the hand-crank hole on the switch machine cover, that is, the gear box hand-crank shaft 120 and the hand-crank hole on the switch machine cover are no longer separated. At this time, the gear box hand-crank shaft on the motor reducer gear box 12 is no longer blocked, and the staff can connect the gear box hand-crank shaft through the matching hand crank located on the outside, thereby manually switching the switch machine;

[0067] The hand-crank hole on the switch machine cover is used to longitudinally insert the hand-crank tool (such as a hand-crank handle) matched with the hand-crank shaft of the gear box of the motor reducer in the switch machine;

[0068] The switch machine cover is arranged on the top of the lower shell body of the switch machine.

[0069] In the present invention, in specific implementation, the manual lever 1 includes a manual lever body 100 distributed longitudinally;

[0070] The rear end of the manual lever body 100 is provided with a threaded rod portion 103;

[0071] The front end of the manual lever body 100 is provided with a cylindrical portion 101 and a square portion 102 (the shape of the portion is a cube) in sequence from front to back;

[0072] The front end of the cylindrical portion 101 is connected to one end of an outer hand-cranked portion 105;

[0073] In specific implementation, the cylindrical portion 101 of the manual lever 1 longitudinally penetrates through the front side panel 9 of the lower housing of the switch machine;

[0074] The front side panel 9 of the lower housing of the switch machine is provided with longitudinally distributed bearing mounting through holes;

[0075] A bearing is arranged in the bearing installation through hole;

[0076] The cylindrical portion 101 of the manual lever 1 is connected to the inner ring of the bearing.

[0077] In specific implementation, a square hole 201 is longitudinally provided through the lower part of the movable plug frame 2;

[0078] The square portion 102 of the manual lever 1 is connected (e.g. plugged) to the square hole 201 at the bottom of the movable plug frame 2;

[0079] Furthermore, the square portion 102 of the manual rod 1 and the square hole 201 at the lower portion of the movable plug frame 2 are connected by interference fit.

[0080] In specific implementation, the manual rod body 100 longitudinally passes through the square hole 201 at the lower part of the movable plug frame 2;

[0081] The threaded rod portion 103 at the rear end of the manual rod body 100 is threadedly connected to a fastening nut 10;

[0082] A hollow gasket tube 11 is sleeved on the circumferential outer wall of the manual rod body 100 between the rear side of the lower part of the movable plug frame 2 and the front side of the fastening nut 10;

[0083] The fastening nut 10 abuts against the rear side surface of the washer 11 (i.e., is in tight contact);

[0084] Furthermore, the outer diameter of the fastening nut 10 is larger than the inner diameter of the washer 11 , and smaller than the outer diameter of the washer 11 .

[0085] Furthermore, a split pin insertion hole 104 is radially provided on the threaded rod portion 103 at the rear end of the manual rod body 100;

[0086] A cotter pin is inserted into the cotter pin insertion hole 104 .

[0087] It should be noted that a cotter pin is installed in the cotter pin insertion hole 104 to prevent loosening.

[0088] In the present invention, in a specific implementation, the fixed plate 8 includes a movable plug frame mounting plate portion 801 and a movable plug frame connecting rod docking portion 802;

[0089] The upper left front end of the movable plug frame mounting plate portion 801 is connected to the right end of the movable plug frame connecting rod docking portion 802;

[0090] The movable plug rack 2 comprises a movable plug rack vertical support plate 203 and a movable plug rack top support plate 202;

[0091] Among them, the front end of the longitudinally distributed top support plate 202 of the moving plug rack is connected to the upper rear end of the vertical support plate 203 of the moving plug rack;

[0092] In specific implementation, the left view of the movable plug frame 2 is in the shape of an inverted "L";

[0093] The front view of the movable plug rack mounting plate portion 801 is in an "L" shape;

[0094] In specific implementation, the right side of the movable plug rack vertical support plate 203 of the movable plug rack 2 is the stop surface 204;

[0095] In specific implementation, the upper and lower sides of the top support plate 202 of the movable plug rack are respectively provided with the movable plug 3 and the movable plug rack mounting plate portion 801 of the fixing plate 8;

[0096] Further, the upper surface of the right end of the movable plug rack mounting plate portion 801 of the fixed plate 8 is in contact with the bottom surface of the movable plug rack top support plate 202;

[0097] The top surface of the top support plate 202 of the movable plug frame contacts the bottom surface of the movable plug 3;

[0098] Furthermore, the movable plug 3, the movable plug frame 2 and the fixing plate 8 are fixedly connected by a first fastening screw;

[0099] Furthermore, two movable plug rack through holes 205 distributed front and back are vertically penetrated on the top support plate 202 of the movable plug rack;

[0100] The movable plug rack mounting plate portion 801 of the fixed plate 8 is provided with two fixed plate docking through holes 803 at positions corresponding to the two movable plug rack through holes 205;

[0101] At the front and rear ends of the movable plug 3, at positions corresponding to the two movable plug frame through holes 205, movable plug threaded through holes 301 are vertically penetrated;

[0102] The first fastening screw passes through the fixing plate docking through hole 803 on the fixing plate 8 and the moving plug frame through hole 205 on the top support plate 202 of the moving plug frame from bottom to top, and is threadedly fixedly connected with the moving plug threaded through hole 301 of the moving plug 3 at the corresponding position.

[0103] In specific implementation, the left end of the connecting rod docking portion 802 of the fixed plate 8 is hinged (i.e., rotatably connected) to the right end of the connecting rod 4 through a first pin;

[0104] Further, a fixing plate docking pin hole 802 is provided at the left end of the connecting rod docking portion 802 of the fixing plate 8;

[0105] The right end of the connecting rod 4 is provided with a first connecting rod pin hole 401 at a position corresponding to the fixing plate docking pin hole 802 on the fixing plate 8;

[0106] The fixing plate docking pin hole 802 and the first connecting rod pin hole 401 are connected via a first pin.

[0107] In specific implementation, the left end of the connecting rod 4 is hinged (i.e., rotatably connected) to the lower end of the connecting plate 5 through a second pin;

[0108] Furthermore, a first connecting plate docking pin hole 501 is provided at the lower end of the connecting plate 5;

[0109] The left end of the connecting rod 4 is provided with a second connecting rod pin hole 401 at a position corresponding to the first connecting plate docking pin hole 501 on the connecting plate 5;

[0110] The first connecting plate butt-jointed pin hole 501 and the second connecting rod pin hole 401 are connected via a second pin.

[0111] In the present invention, in a specific implementation, the connecting plate 5 is located above the hinged position with the left end of the connecting rod 4, and is also threadedly fixedly connected with the threaded hole reserved on the housing of the motor reducer gear box 12 arranged in the lower housing of the switch machine located outside through the second fastening screws distributed longitudinally;

[0112] In specific implementation, the lower end of the connecting plate 5 is provided with a second connecting plate docking installation hole 502;

[0113] The second connecting plate docking installation hole 502 is threadedly fixedly connected to a threaded hole reserved on the housing of the motor reducer gear box 12 arranged in the lower housing of the switch machine located outside through a second longitudinally distributed fastening screw;

[0114] Furthermore, the diameter of the second connecting plate butt-jointing installation hole 502 is greater than the diameter of the first connecting plate butt-jointing pin hole 501 .

[0115] Furthermore, the distance between the second connecting plate butt mounting hole 502 and the second connecting rod pin hole 401 at the left end of the connecting rod 4 is greater than the distance between the first connecting plate butt mounting hole 502 and the second connecting rod pin hole 401 at the left end of the connecting rod 4 .

[0116] In the present invention, in a specific implementation, the static plug rack 6 includes a static plug rack vertical support plate 601 and a static plug rack top support plate 605;

[0117] The upper rear end of the vertical support plate 601 of the static plug rack is connected to the front end of the top support plate 605 of the static plug rack distributed longitudinally;

[0118] The front upper surface of the static plug rack top support plate 605 is provided with a static plug 7;

[0119] It should be noted that the static plug frame 6 is an L-shaped structure.

[0120] In a specific implementation, the static plug 7 is fixedly connected to the top support plate 605 of the static plug frame by a third fastening screw.

[0121] In specific implementation, a leftward-protruding limiting protrusion 606 is provided at the lower left end of the vertical support plate 601 of the static plug rack;

[0122] The limiting protrusion 606 is arranged corresponding to the stop surface 204 on the right side of the movable plug rack vertical support plate 203 of the movable plug rack 2;

[0123] It should be noted that the limiting protrusion 606 is arranged on the counterclockwise rotation track (path) of the stop surface 204 of the movable plug rack vertical support plate 203 of the movable plug rack 2.

[0124] It should be noted that the limiting protrusion 606 is used to contact the stop surface 204 on the right side of the moving plug rack vertical support plate 203 when the moving plug rack vertical support plate 203 of the moving plug rack 2 rotates counterclockwise, thereby limiting the rotation angle of the moving plug rack 2 and preventing the moving plug rack 2 and the moving plug 3 (i.e., the moving contact) thereon from continuing to rotate counterclockwise.

[0125] Furthermore, the front view shape of the limiting protrusion 606 is a right-angled trapezoid;

[0126] The height of the left inclined surface of the limiting protrusion 606 decreases from left to right;

[0127] Furthermore, the angle between the left inclined surface of the limiting protrusion 606 and the bottom surface of the limiting protrusion 606 is an obtuse angle, and is preferably 105°.

[0128] In specific implementation, the vertical support plate 601 of the static plug frame is fixedly connected to the front side panel 9 of the lower housing of the switch machine located outside by a fourth screw;

[0129] Furthermore, a first static plug threaded hole 602 is respectively provided at the upper and lower ends of the static plug rack vertical support plate 601;

[0130] The front side panel 9 of the lower housing of the switch machine is provided with two front side panel through holes at positions corresponding to the two first static plug threaded holes 602;

[0131] After the fourth screw passes through the through hole of the front panel from front to back, it is threadedly fixedly connected with the first static plug threaded hole 602 on the static plug vertical support plate 601 at the corresponding position.

[0132] In a specific implementation, a latch 13 is fixedly connected to the rear end of the static plug rack top support plate 605 of the static plug rack 6 (connected by riveting).

[0133] In specific implementation, the lower rear side of the static plug vertical support plate 601 is connected to the stop iron 607 through rivets;

[0134] Furthermore, two second rivet mounting holes 603 spaced apart from each other are longitudinally provided through the lower end of the static plug vertical support plate 601;

[0135] The stopper is provided with a stopper rivet mounting hole at a position corresponding to the two second rivet mounting holes 603;

[0136] The iron stop rivet mounting hole on the iron stop is riveted to the second rivet mounting hole 603 on the static plug vertical support plate 601 through a rivet.

[0137] It should be noted that see Figure 8b As shown, the stopper 607 is an iron stopper in a rectangular shape, and has two stopper rivet mounting holes on its top.

[0138] In order to more clearly understand the technical solution of the present invention, the working principle of the present invention is explained below.

[0139] Firstly, the safety switch mechanism provided by the present invention is pre-connected in series with the original switch machine action circuit on the switch machine;

[0140] During use, when the manual lever 1 is rotated clockwise, the movable plug rack 2 and the movable plug 3 on the movable plug rack 2 are driven to rotate clockwise, so that the movable plug 3 is connected to the static plug 7, so that the original switch machine action circuit on the switch machine is connected, and at the same time, the connecting plate 5 is driven to block the gear box hand-cranked shaft 120 on the original motor reducer gear box 12 in the switch machine, prohibiting manual operation;

[0141] During use, when the manual rod 1 is rotated counterclockwise, the moving plug rack 2 and the moving plug 3 on the moving plug rack 2 are driven to rotate counterclockwise, so that the moving plug 3 is separated from the static plug 7, the original switch machine action circuit on the switch machine is disconnected, and at the same time, the connecting plate 5 is driven away from the motor reducer gear box 12 (specifically, away from the gear box hand crank shaft 120), manual operation can be performed, and the manual rod 1 is rotated beyond a preset angle (for example, the angle between the vertical center axis of the moving plug and the horizontal plane is greater than 90°), and the stop surface 204 on the right side of the moving plug rack vertical support plate 203 of the moving plug rack 2 is limited by the lower boss 606 of the static plug rack 6, thereby limiting the rotation angle of the moving contact (i.e., the moving plug) installed on the moving plug rack 2, avoiding the moving contact (i.e., the moving plug) from opening at an excessively large angle, thereby avoiding the moving contact (i.e., the moving plug) from contacting the original contact seat in the switch machine adjacent to the safety switch.

[0142] It should be noted that when the dynamic plug 3 is connected to the static plug 7 (specifically, the static contact piece 70 on the static plug 7 is inserted), the connecting plate 5 (i.e., the baffle) is located between the hand-cranked shaft of the gearbox on the original motor reducer in the switch machine and the hand-cranked hole on the cover of the switch machine, that is, the hand-cranked shaft of the gearbox on the motor reducer is blocked at this time, making it impossible to manually switch the switch machine;

[0143] When the manual rod 1 is rotated counterclockwise, the movable plug frame 2 and the movable plug 3 on the movable plug frame 2 are driven to rotate counterclockwise, and the fixed plate 8 and the connecting rod 4 drive the connecting plate 5 (i.e., the baffle plate) to rotate clockwise, and the connecting plate 5 (i.e., the baffle plate) is separated from the previous position and is no longer located between the gear box hand-crank shaft 120 on the original motor reducer gear box 12 in the switch machine and the hand-crank hole on the switch machine cover. At this time, the gear box hand-crank shaft on the motor reducer gear box 12 is no longer blocked, and the staff can connect the gear box hand-crank shaft through the matching hand crank located outside, thereby manually switching the switch machine;

[0144] The hand-crank hole on the switch machine cover is used to longitudinally insert a hand-crank tool (such as a hand-crank handle) matched with the gear box hand-crank shaft 120 of the motor reducer gear box 12 in the switch machine;

[0145] The switch machine cover is arranged on the top of the lower shell body of the switch machine.

[0146] Based on the safety switch mechanism provided by the present invention, the present invention further provides a switch machine, which includes the safety switch mechanism as described above, and a switch machine lower housing;

[0147] The front end of the manual lever 1 is pivotally connected to the front side panel 9 of the lower housing of the switch machine.

[0148] Compared with the prior art, the safety switch mechanism and switch machine provided by the present invention have the following beneficial effects:

[0149] 1. Based on the present invention, during the maintenance of the switch machine, while the dynamic and static plugs are disconnected during the process of rotating the manual lever, the fixed plate and the connecting rod drive the baffle (the baffle is the connecting plate 5) to rotate. As the connecting plate rotates out of its original position, the gear box hand crank shaft can be operated to move, thereby avoiding accidental operation of the gear box hand crank shaft without power off, and realizing a safe operation function.

[0150] 2. In the present invention, a limiting boss 606 is provided on the left side of the lower end of the static plug rack. When the safety switch is disconnected, the manual lever 1 is rotated to drive the moving plug rack 2 to rotate to the left (i.e., counterclockwise). The right side surface of the lower end of the moving plug rack 2 (i.e., the stop surface 204) is stopped by the limiting boss 606 on the left side of the lower end of the static plug rack 6, so that the moving plug 3 rotates to a certain angle and no longer rotates, thereby preventing the moving contact of the safety switch from contacting the contact seat, and having a limiting function.

[0151] 3. Based on the present invention, the safety risk caused by misoperation of the hand-cranked shaft of the gear box due to failure to cut off the power can be realized, and a limiting boss is added to the static plug frame to avoid contact between the moving contact of the safety switch and the contact seat. The present invention has a reasonable structure and is easy to operate, and effectively realizes the safety function.

[0152] 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 principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A safety switch mechanism, characterized in that: include: A manual rod (1), a movable plug frame (2), a movable plug (3), a connecting rod (4), a connecting plate (5), a static plug frame (6), a static plug (7) and a fixed plate (8); The front end of the manual lever (1) is pivotally connected to the front side panel (9) of the lower housing of the switch machine located outside; The manual rod (1) is also connected to the movable plug frame (2); The connection position between the movable plug frame (2) and the manual lever (1) is located at the rear side of the front side panel (9) of the lower housing of the switch machine; A movable plug (3) is arranged on the top surface of the top support plate (202) of the movable plug frame (2); The bottom surface of the top support plate (202) of the movable plug frame (2) is connected to the right end of the fixed plate (8); The other end of the fixed plate (8) is hinged to the right end of the connecting rod (4); Wherein, the left end of the connecting rod (4) is hinged to the lower end of the connecting plate (5); A gear box hand-crank shaft (120) is arranged at the front side of the original motor reducer gear box (12) in the lower housing of the switch machine and is located behind the connecting plate (5); Wherein, a static plug rack (6) is arranged on the right side of the dynamic plug rack (2); A static plug (7) is arranged on the upper part of the static plug frame (6); Wherein, the moving plug (3) on the top of the moving plug frame (2) is arranged correspondingly to the static plug (7) on the top of the static plug frame (6); The static plug frame (6) is provided with a structure for limiting the rotation angle of the dynamic plug frame (2).

2. The safety switch mechanism according to claim 1, characterized in that: A manual lever (1) comprises a manual lever body (100) distributed longitudinally; The rear end of the manual rod body (100) is provided with a threaded rod portion (103); The front end of the manual lever body (100) is provided with a cylindrical portion (101) and a square portion (102) in sequence from front to back; The front end of the cylindrical portion (101) is connected to one end of an outer hand-cranked portion (105).

3. The safety switch mechanism according to claim 2, characterized in that: The cylindrical portion (101) of the manual lever (1) longitudinally penetrates through the front side panel (9) of the lower housing of the switch machine; The front side panel (9) of the lower housing of the switch machine is provided with longitudinally distributed bearing installation through holes; A bearing is arranged in the bearing installation through hole; The cylindrical portion (101) of the manual lever (1) is connected to the inner ring of the bearing.

4. The safety switch mechanism according to claim 2, characterized in that: A square hole (201) is longitudinally provided through the lower part of the movable plug frame (2); The square portion (102) of the manual lever (1) is connected to the square hole (201) at the bottom of the movable plug frame (2); and / or, A manual rod body (100) longitudinally penetrates through a square hole (201) at the lower portion of the movable plug frame (2); The threaded rod portion (103) at the rear end of the manual rod body (100) is threadedly connected to a fastening nut (10); A hollow gasket tube (11) is sleeved on the circumferential outer wall of the manual rod body (100) located between the rear side of the lower part of the movable plug frame (2) and the front side of the fastening nut (10); The fastening nut (10) abuts against the rear side surface of the washer tube (11).

5. The safety switch mechanism according to claim 4, characterized in that: The square portion (102) of the manual rod (1) and the square hole (201) at the bottom of the movable plug frame (2) are connected by interference fit; and / or, The outer diameter of the fastening nut (10) is larger than the inner diameter of the gasket (11) and smaller than the outer diameter of the gasket (11); and / or, A split pin insertion hole (104) is radially provided on the threaded rod portion (103) at the rear end of the manual rod body (100); A cotter pin is inserted into the cotter pin insertion hole (104).

6. The safety switch mechanism according to claim 1, characterized in that: A fixed plate (8), comprising a movable plug frame mounting plate portion (801) and a movable plug frame connecting rod docking portion (802); The upper left front end of the movable plug frame mounting plate portion (801) is connected to the right end of the movable plug frame connecting rod docking portion (802); A movable plug rack (2), comprising a movable plug rack vertical support plate (203) and a movable plug rack top support plate (202); Wherein, the front end of the longitudinally distributed top support plate (202) of the movable plug rack is connected to the upper rear end of the vertical support plate (203) of the movable plug rack; The right side surface of the movable plug frame vertical support plate (203) of the movable plug frame (2) is a stop surface (204); The movable plug frame mounting plate parts (801) of which the movable plug (3) and the fixing plate (8) are respectively arranged on the upper and lower sides of the movable plug frame top support plate (202); The movable plug (3), the movable plug frame (2) and the fixing plate (8) are fixedly connected by a first fastening screw.

7. The safety switch mechanism according to claim 1, characterized in that: The left end of the connecting rod docking portion (802) of the fixed plate (8) is hinged to the right end of the connecting rod (4) via a first pin; The left end of the connecting rod (4) is hinged to the lower end of the connecting plate (5) via a second pin; and / or, The connecting plate (5) is also threadedly fixedly connected to a threaded hole reserved on the housing of a motor reducer gear box (12) arranged in the lower housing of the switch machine located outside, through a second longitudinally distributed fastening screw at a position above the position where it is hinged with the left end of the connecting rod (4).

8. The safety switch mechanism according to any one of claims 1 to 7, characterized in that: A static plug rack (6), comprising a static plug rack vertical support plate (601) and a static plug rack top support plate (605); The upper rear end of the vertical support plate (601) of the static plug rack is connected to the front end of the top support plate (605) of the static plug rack distributed longitudinally; A static plug (7) is provided on the front upper surface of the static plug rack top support plate (605); A leftward-protruding limiting protrusion (606) is provided at the lower left end of the vertical support plate (601) of the static plug rack; The limiting protrusion (606) is arranged corresponding to the stop surface (204) on the right side of the movable plug frame vertical support plate (203) of the movable plug frame (2).

9. The safety switch mechanism according to claim 8, characterized in that: The front view of the limiting protrusion (606) is a right-angled trapezoid; The height of the left inclined surface of the limiting protrusion (606) decreases from left to right; and / or, The angle between the left inclined surface of the limiting protrusion (606) and the bottom surface of the limiting protrusion (606) is 105°; and / or, The vertical support plate (601) of the static plug frame is fixedly connected to the front side panel (9) of the lower housing of the switch machine located outside by means of a fourth screw.

10. A switch machine, characterized in that: It comprises the safety switch mechanism as claimed in any one of claims 1 to 9, and a lower housing of a switch machine; The front end of the manual lever (1) is pivotally connected to the front side panel (9) of the lower housing of the switch machine.

Images