Locomotive electric key switch mechanism

Abstract

The application discloses a locomotive electric key switch mechanism, which comprises a key, a lock seat, a limiting sleeve, a lock core and a transmission mechanism, and a reset structure is arranged in a screw rod of the transmission mechanism. The switch mechanism has a self-locking function, is small in structure and high in reliability. The key must be pressed to be rotated, and the key can only be inserted or pulled out in the off position. When the key is in the on position, the key is reset and self-locked under the action of the reset structure, so that the key is effectively prevented from being rotated by mistake and affecting the power-on and power-off of the locomotive. When the key is rotated between the off position and the on position, the transmission mechanism is accompanied by extension or retraction to control the opening and closing actions of the switch, and the switch feeds back a switch quantity electric signal to control the power-on and power-off of the locomotive.

Description

TECHNICAL FIELD

[0001] The present application relates to a locomotive electric key switch mechanism, belonging to the field of locomotive traction system and braking system. BACKGROUND

[0002] The existing locomotive electric key switch mechanism is easy to be triggered by mistake during use, and the key of the electric key switch mechanism is returned from the open position to the closed position, which causes the automatic lowering of the locomotive pantograph and the power failure of the locomotive, seriously affecting the safety of train operation. Therefore, it is urgent to provide a new locomotive electric key switch mechanism with self-locking function, which can effectively prevent the key from being returned to the closed position by mistake and causing the abnormal lowering of the locomotive pantograph and power failure. SUMMARY

[0003] The present application aims to provide a locomotive electric key switch mechanism which can actively self-lock in the open position to prevent the key from being returned to the closed position by mistake and causing the abnormal lowering of the locomotive pantograph and power failure.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is as follows: a locomotive electric key switch mechanism, comprising a key, a lock seat, a limiting sleeve, a lock cylinder, a transmission mechanism; the limiting sleeve is installed in the lock seat, the key is rotatably installed in the limiting sleeve and moves between 0 position and 1 position to realize the closing and opening of the electric key, the limiting sleeve is used to limit the key to stay at 0 position or 1 position; the transmission mechanism is in contact with the switch and is used to control the opening or closing of the switch, the transmission mechanism comprises a lead screw and a transmission block, the lead screw is threadedly connected with the transmission block; the bottom of the limiting sleeve is tightly connected with the lock cylinder, the lock cylinder is embedded in the lock seat, and the bottom of the lock cylinder is tightly connected with the lead screw; the key is provided with a constraint step and a lock cylinder hole matching surface, the key is inserted into the limiting sleeve and the lock cylinder through the lock cylinder hole matching surface, and the constraint step is used to cooperate with the limiting sleeve to resist and constrain the key from being pulled out; the limiting sleeve is provided with a self-locking edge and a constraint edge, the lock cylinder hole matching surface cooperates with the constraint edge to resist and limit the key; the key is also provided with a self-locking groove, the self-locking groove cooperates with the self-locking edge to prevent the key from being accidentally rotated; the inner cavity of the lead screw is provided with a reset structure, the lock seat is also provided with a lock cylinder control structure and a positioning structure; the bottom of the key cooperates with the reset structure, the lock cylinder control structure is used for locking or unlocking the lock cylinder, and the positioning structure is used for positioning the rotation of the key between 0 position and 1 position.

[0005] The locomotive electric key switch mechanism provided by the application has the following advantages: when in the working state, the key is inserted into the flat square hole of the lock cylinder and the limiting sleeve through the matching surface of the lock cylinder hole; the key is pressed, the bottom of the key is in contact with the reset structure, the key extrudes the lock cylinder control structure, and the lock cylinder is unlocked; meanwhile, the matching surface of the lock cylinder hole is separated from the constraint of the limiting sleeve, the key drives the lock cylinder to rotate from the 0 position (off position) to the 1 position (on position), and the matching surface of the lock cylinder hole is in contact with the constraint edge for limiting; after the hand is released, the key is lifted under the action of the reset mechanism, the self-locking groove is in contact with the self-locking edge for locking, so that the key is prevented from being rotated by mistake; meanwhile, the constraint step is in contact with the upper flange bottom surface of the limiting sleeve for constraint, so that the key is prevented from being pulled out; the lock cylinder control structure is in contact with the lock ball matching groove, and the lock cylinder is locked.

[0006] According to the embodiments of the application, the application can be further optimized, and the following is the technical scheme formed after optimization:

[0007] In one preferred embodiment, the reset structure is a spring reset structure, which comprises a guide rod pin, a spring and an adjusting screw; the adjusting screw is fastened to the lead screw, the bottom of the spring is in contact with the adjusting screw, and the upper part of the spring is fitted into the guide rod pin. The spring reset structure is simple and reliable, and effectively achieves the purpose of automatic reset of the key.

[0008] In one preferred embodiment, the switch mechanism further comprises a protective cover, and the protective cover comprises a rubber cover and a magnet; the lower part of the rubber cover is mounted to the upper flange edge of the lock seat, and the upper part of the rubber cover is embedded with the magnet.

[0009] When the key is not inserted into the switch mechanism, the protective cover can prevent foreign matters from entering, thereby avoiding the risk of jamming of the key. When the locomotive electric key is in the working state, the protective cover is lifted, and the magnet is separated from the upper flange of the lock seat.

[0010] In one preferred embodiment, the lock cylinder control structure is a first spring lock pin, which comprises a lock ball, a first guide cylinder and a first lock pin spring; one end of the first guide cylinder is fixedly connected with the lock ball, and the other end of the first guide cylinder is sleeved on one end of the first lock pin spring; the other end of the first lock pin spring is fixedly mounted to the outer peripheral wall of the lock seat; the key is further provided with a lock ball matching groove, which is matched with the lock ball for locking the lock cylinder.

[0011] The lock ball cooperates with the key to unlock or lock the lock cylinder: when the key is pressed, the key presses the lock ball into the lock seat, and the lock cylinder is unlocked; after the hand is released, the lock ball is reset and inserted into the lock cylinder, and the lock cylinder is locked.

[0012] In one preferred embodiment, the positioning structure is a second spring lock pin, which includes a positioning ball, a second guide cylinder and a second lock pin spring. One end of the second guide cylinder is fixedly connected with the positioning ball, and the other end is sleeved on one end of the second lock pin spring. The other end of the second lock pin spring is fixedly installed on the outer peripheral wall of the lock seat. The outer peripheral wall of the lock cylinder is provided with a positioning hole for cooperating with the positioning ball.

[0013] The positioning ball cooperates with the positioning hole on the outer periphery of the lock cylinder to position the key during rotation between the on / off positions.

[0014] In one preferred embodiment, the bottom of the key is columnar.

[0015] The columnar bottom of the key can be more stably positioned when inserted into the lock cylinder, reducing the inconvenience caused by key shaking. When the reset structure is pressed, a greater torque can be generated, allowing the electric key to rotate more smoothly.

[0016] In one preferred embodiment, the transmission mechanism further includes a transmission constraint structure; preferably, the transmission constraint structure is a guide rod screw.

[0017] The lock seat is fastened to the frame of the switching mechanism by the transmission constraint structure, and the transmission constraint structure is used to constrain the transmission mechanism from deflecting during movement. When the transmission constraint structure is a guide rod screw, accurate alignment between the lock seat, the frame and the transmission mechanism can be ensured, improving the stability and reliability of the switching mechanism. The guide rod screw constrains the transmission mechanism to move in a straight line without deflection, and the structure of the guide rod screw is compact and occupies less space.

[0018] In one preferred embodiment, a gasket is provided between the spring and the adjustment screw. Adding a gasket can adjust the spring force.

[0019] In one preferred embodiment, the switch is a travel switch, the transmission mechanism contacts the push rod of the travel switch, the lead screw drives the transmission block to move up and down along the guide rod pin as the lock cylinder rotates, and drives the travel switch to act to feed high and low level signals.

[0020] Compared with the prior art, the locomotive electric key switch mechanism has the advantages that the switch mechanism has a self-locking function, is small in structure, and is high in reliability; the key must be actively pressed down to rotate, and the key can only be inserted or pulled out in the off position; in the on position, the key is reset under the action of the reset structure, which can effectively prevent the key from being accidentally rotated to affect the power-on and power-off of the locomotive; when the key rotates between the off position and the on position, the transmission mechanism is accompanied by extension or retraction to control the opening and closing actions of the travel switch, and the travel switch feeds back a switch quantity electrical signal to control the power-on and power-off of the locomotive. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a whole block diagram of the locomotive electric key mechanism of an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of a key structure of an embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a protective cover of an embodiment of the present application;

[0024] Figure 4 is a schematic diagram of a limiting sleeve of an embodiment of the present application;

[0025] Figure 5 is a bottom view of the locomotive electric key switch mechanism of an embodiment of the present application;

[0026] Figure 6 is a perspective view of the locomotive electric key switch mechanism of an embodiment of the present application;

[0027] Figure 7 is a front sectional view of the locomotive electric key switch mechanism of an embodiment of the present application;

[0028] Figure 8 is a right sectional view of the locomotive electric key switch mechanism of an embodiment of the present application;

[0029] Figure 9 is a left sectional view of the locomotive electric key switch mechanism of an embodiment of the present application.

[0030] Wherein, 1 is a key, 101 is a constraint step, 102 is a lock core hole matching surface, 103 is a self-locking groove, 104 is a lock ball matching groove, 2 is a protective cover, 201 is a rubber cover, 202 is a magnet, 3 is a lock seat, 4 is a transmission mechanism, 401 is a lead screw, 402 is a transmission block, 403 is a guide rod screw, 5 is a frame, 6 is a travel switch, 7 is a limiting sleeve, 701 is a self-locking edge, 702 is a constraint edge, 8 is a spring reset mechanism, 801 is a guide rod pin, 802 is a spring, 803 is an adjusting screw, 9 is a lock core, 10 is a positioning ball, and 11 is a lock ball. DETAILED DESCRIPTION

[0031] The present application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] Embodiment 1

[0033] The present embodiment 1 provides a locomotive electric key switch mechanism with self-locking function. The switch mechanism is used for controlling the switch of the travel switch 6, including a key 1, a protective cover 2, a lock seat 3, a transmission mechanism 4, a frame 5, a limiting sleeve 7, a spring return mechanism 8, a lock core 9, a first spring lock pin, a second spring lock pin, etc.

[0034] The key 1 is provided with a constraint step 101, a lock core hole matching surface 102, a self-locking groove 103 and a lock ball matching groove 104; the key 1 can be moved between 0 and 1 positions to realize the closing and opening of the electric key; as Figure 2 indicated.

[0035] The protective cover 2 includes a rubber cover 201 and a magnet 202; the lower part of the rubber cover 201 is mounted on the upper flange edge of the lock seat 3, and the upper part of the rubber cover 201 is embedded with the magnet 202, as Figure 3 indicated.

[0036] The lock seat 3 is embedded with a limiting sleeve 7, which is fastened and connected into one body through a pin; the limiting sleeve 7 is provided with a self-locking edge 701 and a constraint edge 702, as Figure 4 indicated.

[0037] The transmission mechanism 4 includes a lead screw 401, a transmission block 402 and a guide rod screw 403; the lead screw 401 is threadedly connected with the transmission block 402; the spring return mechanism 8 includes a guide rod pin 801, a spring 802 and an adjusting screw 803; the adjusting screw 803 is fastened on the lead screw 401; the bottom of the spring 8 is in contact with the adjusting screw 803; the upper part of the spring 802 is loaded into the guide rod pin 801, as Figures 6 to 9 indicated. The spring return mechanism 8 can also adjust the spring force by adding a gasket.

[0038] The lock seat 3 is also embedded with a lock core 9, which is fastened and connected into one body with the lead screw 401 through a pin; as Figures 6 to 9 indicated.

[0039] The lock seat is also provided with a first spring lock pin, which comprises a lock ball 11, a first guide cylinder and a first lock pin spring. One end of the first guide cylinder is fixedly connected with the lock ball 11, and the other end is sleeved on one end of the first lock pin spring. The other end of the first lock pin spring is fixedly installed on the circumferential wall of the lock seat 3. The lock seat is also provided with a second spring lock pin, which comprises a positioning ball 10, a second guide cylinder and a second lock pin spring. One end of the second guide cylinder is fixedly connected with the positioning ball 10, and the other end is sleeved on one end of the second lock pin spring. The other end of the second lock pin spring is fixedly installed on the circumferential wall of the lock seat 3. As shown in the figure. The lock ball 11 cooperates with the key 1, and is used for unlocking or locking the lock cylinder 9. When the key 1 is pressed, the key 1 presses the lock ball 11 to retract into the lock seat 3, and the lock cylinder 9 is unlocked. After the hand is released, the lock ball 11 is reset and inserted into the lock cylinder 9, cooperates with the lock ball matching groove 104, and the lock cylinder 9 is locked. The positioning ball 10 cooperates with the positioning hole on the outer circumference of the lock cylinder 9, and is used for positioning the rotation of the key 1 between the on / off positions. Figures 6 to 9

[0040] The lock seat 3 is fastened to the frame 5 by four guide rod screws 403. The travel switch 6 is installed below the frame 5 by screws.

[0041] The locomotive electric key switch mechanism provided in the embodiment 1 has the following working steps:

[0042] 1. In the working state, the protective cover 2 is opened, the magnet 202 is separated from the upper flange of the lock seat 3, and the lock cylinder hole matching surface 102 is inserted into the limiting sleeve 7 and the flat square hole of the lock cylinder 9; step 2 is entered;

[0043] ​2. When the key 1 is actively pressed down, the cylindrical bottom of the key 1 abuts against the guide pin 801, compressing the spring 802. The key 1 squeezes the lock pin 11 and retracts into the lock seat 3, unlocking the lock cylinder 9. At the same time, the lock cylinder hole mating surface 102 disengages from the limiting sleeve 7. The key 1 drives the lock cylinder 9 to rotate from position 0 to position 1, and the lock cylinder hole mating surface 102 abuts against the limiting edge 702 for limitation. After releasing the key, the key 1 rises under the action of the spring reset mechanism 8, and the self-locking groove 103 and the self-locking edge 702... 1. The locking mechanism is engaged to prevent the key 1 from being accidentally turned. At the same time, the constraint step 101 abuts against the bottom surface of the upper flange of the limiting sleeve 7 to prevent the key from being pulled out. The positioning bead 10 engages with the positioning hole on the lock cylinder 9 to be positioned, rotating from position 0 to position 1. The lock pin 11 is reset and inserted into the lock cylinder 9 to engage with the lock pin engagement groove 104, locking the lock cylinder 9. The lead screw 401 rotates with the lock cylinder 9, driving the transmission block 402 to move up and down along the guide pin 801, which in turn drives the limit switch 6 to actuate and provide feedback high and low level signals.

[0044] 3. In the non-working state, actively pressing down on the key 1 causes the cylindrical bottom of the key 1 to contact the guide pin 801, compressing the spring 802. The key 1 then presses the lock pin 11 into the lock seat 3, unlocking the lock cylinder 9. Simultaneously, the lock cylinder hole mating surface 102 disengages from the limiting sleeve 7, the self-locking groove 103 separates from the self-locking ridge 701, and the key 1 rotates the lock cylinder 9 from position 1 to position 0. The lock cylinder hole mating surface 102 then contacts the limiting ridge 702 for restraint. After releasing the key... The key 1 rises under the action of the spring reset mechanism 8, and the key 1 can be pulled out vertically; the positioning bead 10 is positioned by cooperating with the positioning hole on the lock cylinder 9, rotating from position 1 to position 0; the lock pin 11 is reset and inserted into the lock cylinder 9 to cooperate with the lock pin mating groove 104, and the lock cylinder 9 is locked; the lead screw 401 rotates with the lock cylinder 9, driving the transmission block 402 to move up and down along the guide pin 801, driving the limit switch 6 to act and feeding back high and low level signals; proceed to step 4;

[0045] 4. Cover the lock seat 3 with the protective cover 2, and the magnet 202 will be attracted to the flange on the lock seat 3.

[0046] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the present embodiments by those skilled in the art will fall within the scope defined by the appended claims.

Claims

1. A locomotive electric key switch mechanism, comprising a key (1), a lock seat (3), a limiting sleeve (7), a lock cylinder (9), a transmission mechanism (4); the limiting sleeve (7) is installed in the lock seat (3), the key (1) is rotatably installed in the limiting sleeve (7) to realize the closing and opening of the electric key by moving between 0 position and 1 position, the limiting sleeve (7) is used to limit the key (1) to stay at 0 position or 1 position; the transmission mechanism (4) is in contact with a switch to control the opening or closing of the switch, the transmission mechanism (4) comprises a lead screw (401) and a transmission block (402), the lead screw (401) is threadedly connected with the transmission block (402); the bottom of the limiting sleeve (7) is fixedly connected with the lock cylinder (9), the lock cylinder (9) is embedded in the lock seat (3), and the bottom of the lock cylinder (9) is fixedly connected with the lead screw (401); characterized in that the key (1) is provided with a constraint step (101) and a lock cylinder hole matching surface (102), the key (1) is inserted into the limiting sleeve (7) and the lock cylinder (9) through the lock cylinder hole matching surface (102), and the constraint step (101) is used to cooperate with the limiting sleeve (7) to resist and constrain the key (1) from being pulled out; the limiting sleeve (7) is provided with a self-locking edge (701) and a constraint edge (702), the lock cylinder hole matching surface (102) cooperates with the constraint edge (702) to resist and limit the key (1); the key (1) is further provided with a self-locking groove (103), the self-locking groove (103) cooperates with the self-locking edge (701) to prevent the key (1) from being accidentally rotated; the inner cavity of the lead screw (401) is provided with a reset structure, the lock seat (3) is further provided with a lock cylinder control structure and a positioning structure; the bottom of the key (1) cooperates with the reset structure, the lock cylinder (9) is locked or unlocked through the lock cylinder control structure, and the key (1) is positioned between 0 position and 1 position through the positioning structure.

2. The locomotive electric key switch mechanism as defined in claim 1 wherein, the reset structure is a spring reset structure (8) comprising a guide rod pin (801), a spring (802) and an adjusting screw (803); the adjusting screw (803) is fixed on the lead screw (401), the bottom of the spring (802) is in contact with the adjusting screw, and the upper part of the spring (802) is fitted into the guide rod pin (801).

3. The locomotive electric key switch mechanism as defined in claim 1 wherein, the switch mechanism further comprises a protective cover (2), the protective cover (2) comprises a rubber cover (201) and a magnet (202), the lower part of the rubber cover (201) is installed on the upper flange edge of the lock seat (3), and the upper part of the rubber cover (201) is embedded with the magnet (202).

4. The locomotive electric key switch mechanism as defined in claim 1 wherein, the lock cylinder control structure is a first spring lock pin, the first spring lock pin comprises a lock ball (11), a first guide cylinder and a first lock pin spring, one end of the first guide cylinder is fixedly connected with the lock ball (11), the other end of the first guide cylinder is sleeved on one end of the first lock pin spring, and the other end of the first lock pin spring is fixedly installed on the outer peripheral wall of the lock seat (3). The key (1) is further provided with a lock ball matching groove (104) matched with the lock ball (11) for locking the lock cylinder (9).

5. The locomotive electric key switch mechanism as defined in claim 1 wherein, The positioning structure is a second spring lock pin, which comprises a positioning ball (10), a second guide cylinder and a second lock pin spring, one end of the second guide cylinder is fixedly connected with the positioning ball (10), the other end of the second guide cylinder is sleeved on one end of the second lock pin spring, and the other end of the second lock pin spring is fixedly installed on the outer peripheral wall of the lock seat (3). The outer peripheral wall of the lock cylinder (9) is provided with a positioning hole matched with the positioning ball (10).

6. The locomotive electric key switch mechanism as defined in claim 1 wherein, The bottom of the key (1) is columnar.

7. The locomotive electric key switch mechanism of claim 1, wherein, The transmission mechanism (4) further comprises a transmission constraint structure.

8. The locomotive electric key switch mechanism of claim 2, wherein, A gasket is arranged between the spring (802) and the adjusting screw (803).

9. The locomotive electric key switch mechanism of claim 2, wherein, The switch is a travel switch (6), the transmission mechanism (4) is in contact with a push rod of the travel switch (6), the lead screw (401) drives the transmission block (402) to move up and down along the guide rod pin (801) with the rotation of the lock cylinder (9), and drives the travel switch (6) to act to feed back high and low level signals.

10. The locomotive electric key switch mechanism of claim 7, wherein, The transmission constraint structure is a guide rod screw (403).

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