Locomotive electric key switching mechanism

Abstract

The locomotive electric key switching mechanism comprises a key, a lock seat, a limiting sleeve, a lock cylinder and a transmission mechanism, and a reset structure is arranged in a lead screw of the transmission mechanism; the switching mechanism has a self-locking function, and is small in structure and high in reliability; the key must be actively pressed down to rotate, and the key can only be inserted or pulled out at the closing position; in the open position, the key is reset and self-locked under the action of the reset structure, so that the key can be effectively prevented from being accidentally touched and rotated to influence the power on and off of the locomotive; when the key rotates between the off position and the on position, the transmission mechanism stretches out or retracts to control the on-off action of the switch, and the switch feeds back switching value electric signals to control the locomotive to be powered on and powered off.

Description

Technical Field

[0001] The present invention relates to a locomotive electric key switch mechanism, belonging to the fields of locomotive traction systems and braking systems. Background Art

[0002] During the use of the existing locomotive electric key switch mechanism, crew members are prone to accidentally touch the key of the electric key switch mechanism to return from the on position to the off position, resulting in the automatic lowering of the locomotive pantograph and causing a power failure fault of the locomotive, seriously affecting the safety of train operation. Therefore, there is an urgent need to provide a new locomotive electric key switch mechanism with a self-locking function, which can effectively prevent the key from being accidentally touched and returning to the off position, resulting in abnormal lowering of the locomotive pantograph and power failure. Summary of the Invention

[0003] The present invention aims to provide a locomotive electric key switch mechanism that can actively self-lock in the on position to prevent the key from being accidentally touched and returning to the off position, resulting in abnormal lowering of the locomotive pantograph and power failure.

[0004] To achieve the above object, the technical solution adopted by the present invention is: a locomotive electric key switch mechanism, including a key, a lock seat, a limit sleeve, a lock core, and a transmission mechanism; the limit sleeve is installed in the lock seat, the key is rotatably installed in the limit sleeve, and the on and off of the electric key are realized by moving between the 0 position and the 1 position. The limit sleeve is used to limit the key to stay at the 0 position or the 1 position; the transmission mechanism contacts the switch and is used to control the on or off of the switch. The transmission mechanism includes a lead screw and a transmission block, and the lead screw is threadedly connected to the transmission block; a lock core is tightly connected to the bottom of the limit sleeve, the lock core is embedded in the lock seat, and the bottom of the lock core is tightly connected to the lead screw; the key is provided with a restraint step and a lock core hole mating surface, and the key is inserted into the limit sleeve and the lock core through the lock core hole mating surface. The restraint step is used to cooperate with the limit sleeve to resist restraint to prevent the key from being pulled out; the limit sleeve is provided with a self-locking edge and a restraint edge, and the lock core hole mating surface cooperates with the restraint edge for the resistance limit of the key; the key is also provided with a self-locking groove, and the self-locking groove cooperates with the self-locking edge to prevent the key from being accidentally touched and rotated; a reset structure is arranged in the inner cavity of the lead screw, and the lock seat is also provided with a lock core control structure and a positioning structure; the bottom of the key cooperates with the reset structure, and is used for locking or unlocking the lock core through the lock core control structure, and is used for positioning the rotation of the key between the 0 position and the 1 position through the positioning structure.

[0005] The locomotive electric key switch mechanism provided by the present invention, in the working state, the key is inserted into the flat square hole of the limit sleeve and the lock core by using the mating surface of the lock core hole; when the key is actively pressed down, the bottom of the key abuts against the reset structure, the key presses the lock core control structure, and the lock core is unlocked; at the same time, the mating surface of the lock core hole is disengaged from the constraint of the limit sleeve, the key drives the lock core to rotate from the 0 position (closed position) to the 1 position (open position), and the mating surface of the lock core hole abuts against the constraint edge for limiting; after releasing the hand, the key rises under the action of the reset mechanism, the self-locking groove cooperates with the self-locking edge to lock, preventing the key from being accidentally touched and rotated; at the same time, the constraint step abuts against the bottom surface of the upper flange of the limit sleeve to prevent the key from being pulled out; the lock core control structure cooperates with the lock ball mating groove, and the lock core is locked.

[0006] According to the embodiments of the present invention, the present invention can be further optimized. The following are the technical solutions formed after optimization:

[0007] In one preferred embodiment, the reset structure is a spring reset structure, including a guide rod pin, a spring and an adjusting screw; the adjusting screw is fastened on the lead screw, the bottom of the spring contacts the adjusting screw, and the upper part of the spring is inserted into the guide rod pin. The spring reset structure is simple and reliable, effectively achieving the purpose of automatic reset of the key.

[0008] In one preferred embodiment, the switch mechanism further includes a protective cover, which includes a rubber cover and a magnet. The lower part of the rubber cover is installed on the upper flange edge of the lock seat, and the magnet is embedded in the upper part of the rubber cover.

[0009] When the key is not inserted into the switch mechanism for use, the protective cover can prevent foreign objects from entering and avoid the risk of jamming when the key cannot be inserted. When the locomotive electric key is in the working state, lift the protective cover, and the magnet is disengaged from the upper flange of the lock seat.

[0010] In one preferred embodiment, the lock core control structure is a first spring lock pin, which includes a lock ball, a first guide cylinder and a first lock pin spring. One end of the first guide cylinder is fixedly connected to the lock ball, the other end thereof 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; the key is also provided with a lock ball mating groove, which cooperates with the lock ball for locking the lock core.

[0011] The lock ball cooperates with the key for unlocking or locking the lock core: when the key is actively pressed down, when the key squeezes the lock ball into the lock seat, the lock core is unlocked; after releasing the hand, the lock ball resets and inserts into the lock core, and cooperates with the lock ball cooperation groove, and the lock core is locked.

[0012] In one preferred embodiment, the positioning structure is a second spring lock pin, and the second spring lock pin includes a positioning bead, a second guide cylinder, and a second lock pin spring. One end of the second guide cylinder is fixedly connected to the positioning bead, and the other end thereof 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; a positioning hole is provided on the outer peripheral wall of the lock core for cooperating with the positioning bead.

[0013] The positioning bead cooperates with the positioning hole on the outer periphery of the lock core for positioning the rotation of the key between the open / closed positions.

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

[0015] The bottom of the key is columnar, so that it can be more stably positioned when inserted into the lock core, reducing the inconvenience of operation caused by the shaking of the key; when the reset structure is squeezed, a greater torque can be generated, enabling the electric key to rotate more smoothly.

[0016] In one preferred embodiment, the transmission structure 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 switch mechanism through 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 adopts a guide rod screw, the accurate alignment between the lock seat, the frame, and the transmission mechanism can be ensured, improving the stability and reliability of the switch mechanism; the guide rod screw constrains the transmission mechanism to move in a straight line direction without deflection, and the structure of the guide rod screw is compact and occupies little space.

[0018] In one preferred embodiment, a gasket is provided between the spring and the adjusting 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, and the lead screw drives the transmission block to move up and down along the guide pin as the lock core rotates, driving the travel switch to act and feedback high and low level signals.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a locomotive electric key switch mechanism. The switch mechanism has a self-locking function, is small in structure and 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. When in the on position, the key is reset and self-locked under the action of the reset structure, which can effectively prevent the key from being accidentally touched and rotated, thus affecting the power on and off of the locomotive. When the key rotates between the off position and the on position, the transmission mechanism extends or retracts accordingly to control the opening and closing actions of the travel switch, and the travel switch feeds back a digital electrical signal to control the power on and off of the locomotive. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the overall block diagram of the locomotive electric key mechanism according to an embodiment of the present invention;

[0022] Figure 2 is the schematic diagram of the key structure according to an embodiment of the present invention;

[0023] Figure 3 is the schematic diagram of the protective cover according to an embodiment of the present invention;

[0024] Figure 4 is the schematic diagram of the limit sleeve according to an embodiment of the present invention;

[0025] Figure 5 is the bottom view of the locomotive electric key switch mechanism according to an embodiment of the present invention;

[0026] Figure 6 is the three-dimensional view of the locomotive electric key switch mechanism according to an embodiment of the present invention;

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

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

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

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

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

[0032] Embodiment 1

[0033] Embodiment 1 of the present invention provides a locomotive electric key switch mechanism with a self-locking function. The switch mechanism is used to control the on / off of the travel switch 6, and includes a key 1, a protective cover 2, a lock base 3, a transmission mechanism 4, a frame 5, a limit 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 mating surface 102, a self-locking groove 103, and a lock ball mating groove 104; the key 1 can move between the 0 position and the 1 position to realize the off and on of the electric key; as Figure 2 shown.

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

[0036] The lock base 3 is embedded with a limit sleeve 7, and they are integrally connected by a pin. The limit sleeve 7 is provided with a self-locking edge 701 and a constraint edge 702, as Figure 4 shown;

[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 to 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 to the lead screw 401. The bottom of the spring 8 contacts the adjusting screw 803, and the upper part of the spring 802 is inserted into the guide rod pin 801, as Figures 6 to 9 shown. The spring return mechanism 8 can also adjust the spring force by adding washers.

[0038] The lock base 3 is also embedded with a lock core 9, and the lock core 9 and the lead screw 401 are integrally connected by a pin; as Figures 6 to 9 shown.

[0039] The lock base is further provided with a first spring lock pin, which includes a lock ball 11, a first guide cylinder and a first lock pin spring. One end of the first guide cylinder is fixedly connected to the lock ball 11, and the other end thereof 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 base 3. The lock base is further provided with a second spring lock pin, which includes a positioning ball 10, a second guide cylinder and a second lock pin spring. One end of the second guide cylinder is fixedly connected to the positioning ball 10, and the other end thereof 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 base 3. As Figures 6 to 9 shown. The lock ball 11 cooperates with the key 1 for unlocking or locking the lock core 9: when the key 1 is actively pressed down, when the key 1 squeezes the lock ball 11 to retract into the lock base 3, the lock core 9 is unlocked; after releasing the hand, the lock ball 11 resets and inserts into the lock core 9 and cooperates with the lock ball mating groove 104, and the lock core 9 is locked. The positioning ball 10 cooperates with the positioning hole on the outer circumference of the lock core 9 for positioning the rotation of the key 1 between the on / off positions.

[0040] The lock base 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 Embodiment 1 works as follows:

[0042] 1. In the working state, lift the protective cover 2, the magnet 202 is separated from the upper flange of the lock base 3, and the flat square hole of the limit sleeve 7 and the lock core 9 is inserted by using the lock core hole mating surface 102; go to step 2;

[0043] 2. Actively press down the key 1. The cylindrical bottom of the key 1 abuts against the guide rod pin 801 to compress the spring 802. The key 1 squeezes the lock ball 11 to retract into the lock seat 3, and the lock core 9 is unlocked. At the same time, the mating surface 102 of the lock core hole disengages from the constraint of the limit sleeve 7. The key 1 drives the lock core 9 to rotate from the 0 position to the 1 position, and the mating surface 102 of the lock core hole abuts against the constraint edge 702 for positioning. After releasing the hand, the key 1 rises under the action of the spring return mechanism 8. The self-locking groove 103 cooperates with the self-locking edge 701 for locking to prevent the key 1 from being accidentally touched and rotated. At the same time, the constraint step 101 abuts against the bottom surface of the upper flange of the limit sleeve 7 for constraint to prevent the key from being pulled out. The positioning ball 10 cooperates with the positioning hole on the lock core 9 for positioning and rotates from the 0 position to the 1 position. The lock ball 11 resets and inserts into the lock core 9 to cooperate with the lock ball mating groove 104, and the lock core 9 is locked. The lead screw 401 drives the transmission block 402 to move up and down along the guide rod pin 801 as the lock core 9 rotates, driving the travel switch 6 to act and feedback high and low level signals.

[0044] 3. When in the non-working state, actively press down the key 1. The cylindrical bottom of the key 1 abuts against the guide rod pin 801 to compress the spring 802. The key 1 squeezes the lock ball 11 to retract into the lock seat 3, and the lock core 9 is unlocked. At the same time, the mating surface 102 of the lock core hole disengages from the constraint of the limit sleeve 7. The self-locking groove 103 separates from the self-locking edge 701. The key 1 drives the lock core 9 to rotate from the 1 position to the 0 position, and the mating surface 102 of the lock core hole abuts against the constraint edge 702 for positioning. After releasing the hand, the key 1 rises under the action of the spring return mechanism 8, and the key 1 can be vertically pulled out. The positioning ball 10 cooperates with the positioning hole on the lock core 9 for positioning and rotates from the 1 position to the 0 position. The lock ball 11 resets and inserts into the lock core 9 to cooperate with the lock ball mating groove 104, and the lock core 9 is locked. The lead screw 401 drives the transmission block 402 to move up and down along the guide rod pin 801 as the lock core 9 rotates, driving the travel switch 6 to act and feedback high and low level signals; go to step 4;

[0045] 4. Cover the lock seat 3 with the protective cover 2, and the magnet 202 is attracted to the upper flange of the lock seat 3.

[0046] The content clarified in the above embodiments should be understood that these embodiments are only used to illustrate the present invention more clearly, rather than to limit the scope of the present invention. After reading the present invention, various equivalent forms of modification of this embodiment by those skilled in the art all fall within the scope defined by the appended claims of the present invention.

Claims

1. A locomotive electric key switch mechanism, comprising a key (1), a lock seat (3), a limiting sleeve (7), a lock core (9), and 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) and realizes the closing and opening of the electric key by moving between the 0 position and the 1 position, and the limiting sleeve (7) is used to limit the key (1) to stay at the 0 position or the 1 position; the transmission mechanism (4) is in contact with the switch and is used 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) and the transmission block (402) are threadedly connected; the bottom of the limiting sleeve (7) is tightly connected to the lock core (9), the lock core (9) is embedded in the lock seat (3), and the bottom of the lock core (9) is tightly connected to the lead screw (401); It is characterized in that The key (1) is provided with a restraining step (101) and a lock core hole matching surface (102); the key (1) is inserted into the limiting sleeve (7) and the lock core (9) through the lock core hole matching surface (102); the restraining step (101) is used to cooperate with the limiting sleeve (7) to restrain and prevent the key (1) from being pulled out; The limiting sleeve (7) is provided with a self-locking edge (701) and a restraining edge (702), and the lock core hole matching surface (102) cooperates with the restraining edge (702) to limit the interference of the key (1); The key (1) is also provided with a self-locking groove (103), and the self-locking groove (103) cooperates with the self-locking edge (701) to prevent the key (1) from being accidentally turned; The inner cavity of the lead screw (401) is provided with a reset structure, and the lock seat (3) is also provided with a lock core control structure and a positioning structure; The bottom of the key (1) cooperates with the reset structure, and is used to lock or unlock the lock core (9) through the lock core control structure, and is used to position the key (1) when it rotates between the 0 position and the 1 position through the positioning structure.

2. The locomotive electric key switch mechanism according to claim 1, characterized in that: The reset structure is a spring reset structure (8), comprising a guide pin (801), a spring (802) and an adjusting screw (803); The adjusting screw (803) is fastened to the lead screw (401), the bottom of the spring (8) is in contact with the adjusting screw, and the upper part of the spring (802) is installed in the guide pin (801).

3. The locomotive electric key switch mechanism according to claim 1, characterized in that: The switch mechanism further comprises a protective cover (2), the protective cover (2) comprising a rubber cover (201) and a magnet (202), the lower portion of the rubber cover (201) being mounted on the upper flange edge of the lock seat (3), and the upper portion of the rubber cover (201) being embedded with the magnet (202).

4. The locomotive electric key switch mechanism according to claim 1, characterized in that: The lock core 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 to the lock ball (11), and 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 mounted on the outer peripheral wall of the lock seat (3); The key (1) is also provided with a lock ball matching groove (104), which is matched with the lock ball (11) to lock the lock cylinder (9).

5. The locomotive electric key switch mechanism according to claim 1, characterized in that: The positioning structure is a second spring lock pin, the second spring lock pin comprises a positioning bead (10), a second guide cylinder and a second lock pin spring, one end of the second guide cylinder is fixedly connected to the positioning bead (10), and 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 mounted on the outer peripheral wall of the lock seat (3); The outer peripheral wall of the lock core (9) is provided with a positioning hole, which is used to cooperate with the positioning bead (10).

6. The locomotive electric key switch mechanism according to claim 1, characterized in that: The bottom of the key (1) is columnar.

7. The locomotive electric key switch mechanism according to claim 1, characterized in that: The transmission structure (4) further comprises a transmission constraint structure; preferably, the transmission constraint structure is a guide rod screw (403).

8. The locomotive electric key switch mechanism according to claim 2, characterized in that: A gasket is provided between the spring (802) and the adjusting screw (803).

9. The locomotive electric key switch mechanism according to any one of claims 1 to 8, characterized in that: The switch is a travel switch (6), the transmission mechanism (4) is in contact with the push rod of the travel switch (6), the lead screw (401) rotates with the lock core (9) to drive the transmission block (402) to move up and down along the guide pin (801), and drives the travel switch (6) to operate and feedback high and low level signals.

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