Emergency stop locking switch

Abstract

The utility model discloses an emergency stop lock switch, which comprises a shell, a pull wire, a pull rod, a pusher dog, a lock rod and a microswitch, the lock rod and the pull rod are arranged on the shell in a penetrating manner; the pusher dog and the microswitch are both arranged in the shell; the outer end of the pull rod is connected with the pull wire; and when the pull wire is pulled outwards, the pull rod can drive the lock rod to move downwards through the pusher dog and touch and press the microswitch. The anti-theft lock is characterized by further comprising an elastic ball head plunger; the elastic ball head plunger is fixedly arranged in the shell; an upper ring groove, a lower ring groove and a ball body are sequentially arranged on the lock rod; the ball body is used for being matched with the microswitch; and a ball head of the elastic ball head plunger is used for being matched with the upper ring groove or the lower ring groove. According to the utility model, the lock rod can be positioned and restrained in different working states on the shell, and the working performance precision and sensitivity of the switch can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mining protection systems, in particular to an emergency stop locking switch. Background Art

[0002] The mine emergency stop lockout switch (or "emergency stop switch" or "emergency stop pull-wire switch") is an intrinsically safe electrical device for mines. It is suitable for use in underground coal mines, open-pit coal mines, coal preparation plants and other workplaces as an emergency stop control. When an unexpected situation occurs in a coal mine, the pull wire is pulled to cause the mine emergency stop lockout switch to work, thereby cutting off the power supply of the machine or equipment, which can quickly achieve emergency shutdown of the machine or equipment, protect the safety of on-site personnel and equipment, and achieve the purpose of emergency stop.

[0003] At present, the prior art that has been retrieved and solved recently by this application (such as publication number CN216054362U or CN219350023U) has the following drawbacks and is analyzed as follows: Since the existing lock rod has no positioning constraints in different working states on the housing, the position is not accurate and is easily affected by the tightness of the pull wire, etc., the contact state between the micro switch and the lock rod has deviation and uncertainty, which in turn affects the working performance accuracy and sensitivity. For example: in normal state, the gap between the contact of the micro switch and the lock rod is too large or the contact is pressed and stressed; when the wire is pulled or pressed, the contact of the micro switch and the lock rod are poorly contacted or not in place. Utility Model Content

[0004] The utility model provides an emergency stop locking switch, which can solve the technical problem that the contact state between the micro switch and the locking rod has deviation and uncertainty because the locking rod of the mine emergency stop locking switch has no positioning constraint in different working states on the shell.

[0005] In order to achieve the above-mentioned purpose, the scheme of the utility model is: an emergency stop locking switch, comprising a shell, a pull wire, a pull rod, a push claw, a locking rod and a micro switch; the locking rod and the pull rod are both installed on the shell; the push claw and the micro switch are both arranged in the shell; the outer end of the pull rod is connected to the pull wire; and when the pull wire is pulled outward, the pull rod can drive the locking rod to move downward through the push claw and touch the micro switch, characterized in that: it also includes an elastic ball head plunger; the elastic ball head plunger is fixedly arranged in the shell; the locking rod is sequentially provided with an upper ring groove, a lower ring groove and a ball; the ball is used to cooperate with the micro switch; the ball head of the elastic ball head plunger is used to cooperate with the upper ring groove or the lower ring groove.

[0006] Preferably, the pusher claw is L-shaped and the middle part of the pusher claw is rotatably arranged in the housing; the inner end of the pull rod has an active disk for moving one end of the pusher claw; the lower end of the lock rod is provided with a driven disk that can be moved by the other end of the pusher claw.

[0007] Further, the microswitch has three and is circumferentially distributed along the locking rod.

[0008] Further, the elastic ball head plunger has three and is circumferentially distributed along the locking rod.

[0009] Further, a ring seat is fixedly arranged in the housing; the microswitch is fixed on the ring seat; the middle part of the pawl is rotatably arranged on the ring seat.

[0010] Further, the cross-sections of the upper ring groove and the lower ring groove are V-shaped.

[0011] Further, there are two stay wires and they are symmetrically distributed along the center of the locking rod; there are two pull rods and they are symmetrically distributed along the center of the locking rod; there are two pawls and they are symmetrically distributed along the center of the locking rod.

[0012] Advantages of the utility model:

[0013] First, in the utility model, when in the normal state, the upper ring groove of the locking rod cooperates with the ball head of the elastic ball head plunger to be locked, and at this time, the ball of the locking rod is very close to or just contacts the contact of the microswitch, without squeezing the contact of the microswitch. At this time, the microswitch is accurately reset to the first working state, which can ensure that there is no deviation or small deviation in the cooperation state between the microswitch and the locking rod in the normal state, the position is accurate and the signal is determined, thereby improving the accuracy and sensitivity of the switch performance; at the same time, when the stay wire is pulled or pressed, when the lower ring groove of the locking rod cooperates with the ball head of the elastic ball head plunger, the ball of the locking rod is pressed in place by the microswitch contact and can normally generate signal changes, thereby improving the accuracy and sensitivity of the switch performance, and can solve the technical problem that the position of the locking rod of the mine emergency stop locking switch has no positioning constraint in different working states on the housing, resulting in deviation and uncertainty in the contact state between the microswitch and the locking rod, thereby affecting the accuracy and sensitivity of the switch performance;

[0014] Second, in the utility model, since the elastic ball head plunger has three and is circumferentially distributed along the locking rod; three elastic ball head plungers are used to circumferentially cooperate and restrain the locking rod, which plays a guiding role when the locking rod moves up and down, so that it will not tilt during work and moves more smoothly up and down, making the position and cooperation relationship between the locking rod and the microswitch more accurate, and making the overall performance more stable and reliable;

[0015] Third, in the utility model, since the microswitch has three and is circumferentially distributed along the locking rod; since there are three microswitches electrically connected to the main controller; when any one of the microswitches fails, the other two microswitches can work normally, which can avoid the problem that any one of the microswitches fails or malfunctions and cannot achieve safety control. Description of the drawings

[0016] Figure 1It is the front view sectional view of an emergency stop and locking switch in the normal state in the present utility model.

[0017] Figure 2 It is Figure 1 The enlarged view at position A in

[0018] Figure 3 It is the three-dimensional view of an emergency stop and locking switch in the normal state in the present utility model.

[0019] Figure 4 It is the sectional three-dimensional view of an emergency stop and locking switch in the normal state in the present utility model.

[0020] Figure 5 It is Figure 4 The enlarged view at position K in

[0021] Figures 6 - 8 It is the mating relationship diagram among the pawl, locking rod, microswitch, elastic ball head plunger, and ring seat.

[0022] Figure 9 It is Figure 6 The sectional view in the direction of N-N in

[0023] Figure 10 It is the working state diagram of an emergency stop and locking switch in the present utility model when the left outer pull wire is in place.

[0024] Figure 11 It is Figure 10 The enlarged view at position B in

[0025] Figure 12 It is the working state diagram of an emergency stop and locking switch in the present utility model when the right outer pull wire is in place.

[0026] Figure 13 It is Figure 12 The enlarged view at position C in

[0027] Figure 14 It is the working state diagram of an emergency stop and locking switch in the present utility model when the locking rod is pressed in place.

[0028] Figure 15 It is Figure 14 The enlarged view at position D in Detailed implementation manners

[0029] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0030] Embodiment: Refer to Figures 1 - 8 , an emergency stop and locking switch, comprising a housing 1, a pull wire 2, a pull rod 3, a pawl 4, a locking rod 5, a microswitch 6, and an elastic ball head plunger 7.

[0031] The locking rod 5 and the pulling rod 3 can be movably mounted on the housing 1 , and the matching manner is the same as that adopted in the prior art, so it will not be described in detail.

[0032] Specifically, the locking rod 5 is arranged vertically, and the pulling rod 3 is arranged horizontally.

[0033] Among them, the claw 4 and the micro switch 6 are both installed in the shell 1; specifically, a ring seat 8 is fixedly arranged in the shell 1; the micro switch 6 is fixed on the ring seat 8; the claw 4 is L-shaped, and the middle part of the claw 4 is rotatably arranged on the ring seat 8; the inner end of the pull rod 3 has an active disk 3-1 for moving one end of the claw 4; the lower end of the locking rod 5 is provided with a driven disk 5-4 that can be moved by the other end of the claw 4.

[0034] The outer end of the pull rod 4 is fixedly connected to the inner end of the pull wire 3 ; and when the pull wire 2 is pulled outward to drive the pull rod 3 to move, the pull rod 3 can drive the locking rod 5 to move downward through the claw 4 and press the micro switch 6 .

[0035] The elastic ball plunger 7 is fixedly disposed in the housing 1 ; the elastic ball plunger 7 is fixed on the ring seat 8 ; the ball head 7 - 1 of the elastic ball plunger 7 is radially oriented toward the center of the locking rod 5 .

[0036] The locking rod 5 is provided with an upper annular groove 5-1, a lower annular groove 5-2 and a ball 5-3 in sequence. The ball 5-1 is used to cooperate with the micro switch 6; the ball head 7-1 of the elastic ball plunger 7 is used to cooperate with the upper annular groove 5-1 or the lower annular groove 5-2.

[0037] Specifically, the ball head 7-1 of the elastic ball head plunger 7 will retract when squeezed; when not squeezed, the ball head 7-1 will protrude outward. The specific structure of the elastic ball head plunger 7 is prior art, so it is not repeated here. (For example, purchased from Jinan Maoyi Fastener Co., Ltd., product name: stainless steel hexagon socket ball head elastic plunger).

[0038] When the ball head 7-1 of the elastic ball head plunger 7 is elastically stuck in the upper ring groove 5-1 or the lower ring groove 5-2, the current locking rod 5 can be accurately positioned. However, when the ball head 7-1 of the elastic ball head plunger 7 is squeezed by a certain external force, it will automatically retract, and the ball head 7-1 of the elastic ball head plunger 7 can switch between the state of cooperating with the upper ring groove 5-1 or the state of cooperating with the lower ring groove 5-2. When the external force is small or normal, the ball head 7-1 of the elastic ball head plunger 7 is very stable and reliable when it is against the upper ring groove 5-1 or the lower ring groove 5-2.

[0039] In this embodiment, see Figures 6 - 9There are three micro switches 6 and they are distributed along the circumference of the lock rod 5. Each of the micro switches 6 is electrically connected to the main controller. When any one of the micro switches 6 fails, the other two micro switches 6 can work normally, which can avoid the problem that any one of the micro switches 6 fails and the safety control cannot be achieved.

[0040] In this embodiment, see Figures 6 - 9 The elastic ball plunger 7 has three and is distributed along the circumference of the lock rod 5. The three elastic ball plungers 7 are used to constrain the lock rod 5 in the circumferential direction, which plays a guiding role when the lock rod 5 moves up and down, so that it will not tilt during operation and move up and down more smoothly, making the position relationship between the lock rod 5 and the micro switch more accurate, and making the overall performance more stable and reliable.

[0041] In this embodiment, the cross-sections of the upper annular groove 5 - 1 and the lower annular groove 5 - 2 are V-shaped.

[0042] In this embodiment, see Figures 1 - 4 , the pull wires 2 have two and are symmetrically distributed along the center of the locking rod 5; the pull rods 3 have two and are symmetrically distributed along the center of the locking rod 5. Specifically, the outer ends of the two pull rods 4 are respectively connected to the two pull wires 3; the two pusher claws 4 correspond to the positions of the two pull rods 4 and are symmetrically distributed along the center of the locking rod 5; the active disks 3-1 of the two pull rods 3 are respectively used to push one end of the two pusher claws 4; the other ends of the two pusher claws 4 are used to push the two sides of the driven disk 5-4 of the locking rod 5 respectively.

[0043] The working principle of this embodiment is:

[0044] When the emergency stop locking switch is in normal working state, the lower ring groove 5-2 of the lock rod 5 cooperates with the ball head 7-1 of the elastic ball head plunger 7 to elastically contact and lock. At this time, the ball 5-3 of the lock rod 5 is very close to or just in contact with the contact 6-1 of the micro switch 6, and will not squeeze the contact 6-1 of the micro switch 6. The micro switch 6 is in the first working state (sending a normal signal), which can be seen in FIG. Figures 1 - 2 .

[0045] When the emergency stop locking switch is in the disconnected state, the upper ring groove 5-1 of the lock rod 5 cooperates with the ball head 7-1 of the elastic ball head plunger 7 to elastically contact and lock. At this time, the ball 5-3 of the lock rod 5 contacts and squeezes the contact 6-1 of the micro switch 6 and the contact 6-1 moves to the right position. The micro switch 6 is in the second working state (sending a disconnection signal). Figures 10 - 15 .

[0046] Specifically, when an unexpected situation occurs in a coal mine, the emergency stop locking switch is used to start working and cut off the power supply of the machine or equipment. The operation method is as follows:

[0047] The first operation method (see Figures 10 - 11 ): The staff can manually pull a pull wire 2 on the left side outward to cause a signal change in the microswitch 23, and then stop the operation of the coal mine transfer belt. Specifically: Pull the pull wire 2 on the left side forcefully to drive the pull rod 3 on the left side to move away from the housing 1 and move leftward. The driving disk 3-1 on the left pull rod 3 will push one end of the pawl 4 on the left side to the left. The left pawl 4 rotates and presses the driven disk 5-4 of the locking rod 5 downward through its other end. The locking rod 5 generates a downward displacement. The sphere 5-3 of the locking rod 5 contacts and presses the contact 6-1 of the microswitch 6 until the ball head 7-1 of the elastic ball head plunger 7 switches from cooperating with the lower annular groove 5-2 on the locking rod 5 to cooperating with its upper annular groove 5-1 and can maintain the state. At this time, the contact 6-1 of the microswitch 6 is pressed to the in-place stroke and will generate a signal change and send it to the main controller, and the main controller controls the coal mine transfer belt to stop operating.

[0048] The second operation method (see Figures 12 - 13 ): Specifically: Pull the pull wire 2 on the right side forcefully to drive the pull rod 3 on the right side to move away from the housing 1 and move rightward. The driving disk 3-1 on the right pull rod 3 will push one end of the pawl 4 on the right side to the right. The right pawl 4 rotates and presses the driven disk 5-4 of the locking rod 5 downward through its other end. The locking rod 5 generates a downward displacement. The sphere 5-3 of the locking rod 5 contacts and presses the contact 6-1 of the microswitch 6 until the ball head 7-1 of the elastic ball head plunger 7 switches from cooperating with the lower annular groove 5-2 on the locking rod 5 to cooperating with its upper annular groove 5-1 and can maintain the state. At this time, the contact 6-1 of the microswitch 6 is pressed to the in-place stroke and will generate a signal change and send it to the main controller, and the main controller controls the coal mine transfer belt to stop operating.

[0049] The third operation method (see Figures 14 - 15 ): The staff can press the locking rod 5 to cause a signal change in the microswitch 23 and then stop the operation of the coal mine transfer belt. Specifically: Press the locking rod 5 forcefully to move downward. The sphere 5-3 of the locking rod 5 contacts and presses the contact 6-1 of the microswitch 6 until the ball head 7-1 of the elastic ball head plunger 7 switches from cooperating with the upper annular groove 5-1 on the locking rod 5 to cooperating with its lower annular groove 5-2 and can maintain the state. At this time, the contact 6-1 of the microswitch 6 is pressed to the in-place stroke and will generate a signal change and send it to the main controller, and the main controller controls the coal mine transfer belt to stop operating.

[0050] When troubleshooting and a reset is required, the locking rod 5 can be pulled upward. The locking rod 5 moves upward until the ball head 7-1 of the elastic ball head plunger 7 switches from cooperating with the upper annular groove 5-1 on the locking rod 5 to cooperating with its lower annular groove 5-2 (see Figures 1 - 4) At this time, the sphere 5-3 of the lock rod 5 is very close to or just in contact with the contact 6-1 of the microswitch 6, and will not squeeze the contact 6-1 of the microswitch 6. At this time, the microswitch 6 is accurately reset to the first working state.

[0051] Among them, the working characteristics of the elastic ball head plunger 7 are as follows: when the ball head 7-1 of the elastic ball head plunger 7 cooperates with the upper ring groove 5-1 of the lock rod 5 and is stuck, it can accurately position the height of the lock rod 5 and generate a certain resistance to prevent the lock rod 5 from randomly moving up and down in the normal state, resulting in an uncertain relationship between the contact 6-1 of the microswitch 6 and the ball head 7-1 of the lock rod 5. When the lock rod 5 is pressed forcefully or the external wire 2 is pulled, the lower ring groove 5-2 of the lock rod 5 first squeezes the ball head 7-1 of the elastic ball head plunger 7 and the ball head 7-1 retracts, and then the lock rod 5 moves downward relative to the ball head 7-1 of the elastic ball head plunger 7 until the upper ring groove 5-1 of the lock rod 5 moves downward to the position of the ball head 7-1 of the elastic ball head plunger 7. The ball head 7-1 of the elastic ball head plunger 7 automatically extends out and protrudes into the upper ring groove 5-1 and elastically contacts and gets stuck for accurate positioning. At this time, the sphere 5-3 of the lock rod 5 presses the contact 6-1 of the microswitch 6 to the proper position. The microswitch 6 is in the second working state and can maintain the current state and signal. See Figures 10 - 15 .

[0052] In the present utility model, since the upper ring groove 5-1 of the lock rod 5 cooperates with the ball head 7-1 of the elastic ball head plunger 7 and is stuck in the normal state, at this time, the sphere 5-3 of the lock rod 5 is very close to or just in contact with the contact 6-1 of the microswitch 6, and will not squeeze the contact 6-1 of the microswitch 6. At this time, the microswitch 6 is accurately reset to the first working state, which can ensure that there is no deviation or a small deviation in the cooperation state between the microswitch and the lock rod in the normal state, the position is accurate and the signal is determined, thereby improving the accuracy and sensitivity of the switch performance; at the same time, when the wire is pulled or pressed, when the lower ring groove 5-2 of the lock rod 5 cooperates with the ball head 7-1 of the elastic ball head plunger 7 until it stops, the sphere 5-3 of the lock rod 5 is pressed in place by the microswitch 6 and the signal can change normally, thereby improving the accuracy and sensitivity of the switch performance. Therefore, this embodiment can solve the technical problem that the position of the lock rod of the mine emergency stop locking switch has no positioning constraint in different working states on the housing, resulting in a deviation and uncertainty in the contact state between the microswitch and the lock rod, thereby affecting the accuracy and sensitivity of the switch performance.

[0053] The preferred specific embodiments of the present utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present utility model without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the protection scope determined by the claims.

Claims

1. An emergency stop locking switch, comprising a housing (1), a pull wire (2), a pull rod (3), a push claw (4), a locking rod (5) and a micro switch (6); the locking rod (5) and the pull rod (3) are both mounted on the housing (1); the push claw (4) and the micro switch (6) are both arranged in the housing (1); the outer end of the pull rod (4) is connected to the pull wire (3); and when the pull wire (2) is pulled outward, the pull rod (3) can drive the locking rod (5) to move downward through the push claw (4) and touch the micro switch (6), characterized in that: It also includes an elastic ball plunger (7); the elastic ball plunger (7) is fixedly arranged in the housing (1); The lock rod (5) is provided with an upper ring groove (5-1), a lower ring groove (5-2) and a ball (5-3) in sequence; the ball (5-1) is used to cooperate with the micro switch (6); The ball head (7-1) of the elastic ball head plunger (7) is used to cooperate with the upper ring groove (5-1) or the lower ring groove (5-2).

2. An emergency stop locking switch according to claim 1, characterized in that: The pusher claw (4) is L-shaped and the middle part of the pusher claw (4) is rotatably arranged in the housing (1); the inner end of the pull rod (3) has an active disk (3-1) for moving one end of the pusher claw (4); and the lower end of the locking rod (5) is provided with a driven disk (5-4) that can be moved by the other end of the pusher claw (4).

3. An emergency stop locking switch according to claim 1 or 2, characterized in that: The micro switches (6) are three and are distributed along the circumference of the locking rod (5).

4. An emergency stop locking switch according to claim 1, characterized in that: The elastic ball plungers (7) are in number of three and are distributed along the circumference of the locking rod (5).

5. An emergency stop locking switch according to claim 1 or 2, characterized in that: A ring seat (8) is fixedly arranged in the housing (1); The micro switch (6) is fixed on the ring seat (8); the middle part of the pusher claw (4) is rotatably arranged on the ring seat (8).

6. An emergency stop locking switch according to claim 1, characterized in that: The cross sections of the upper annular groove (5-1) and the lower annular groove (5-2) are V-shaped.

7. An emergency stop locking switch according to claim 1, characterized in that: The pull wires (2) have two and are symmetrically distributed along the center of the locking rod (5); The pull rods (3) have two and are symmetrically distributed along the center of the locking rod (5); The pusher claws (4) are provided with two and are symmetrically distributed along the center of the locking rod (5).

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