A safety switch control part anti-self-recovery structure and method

Abstract

The present invention provides a safety switch control component anti-self-recovery structure and method, which are characterized by at least comprising: a fixing member (1), an anti-self-recovery block (or an anti-self-recovery baffle) (2), a safety switch control member (3), a stop pin (4), a spring (5), and a safety switch (6); the safety switch control member (3) is mounted on a shaft passing through the fixing member (1) and swings relative to the fixing member (1); the safety switch (6) and the safety switch control member (3) are located on the same side of the fixing member (1); and the safety switch control member (3) is used to control the connection or disconnection of the safety switch (6). The safety switch control component anti-self-recovery structure and method are easy to operate and can realize the interlocking of the opening and closing of the machine cover and the on-off of the safety switch.

Description

Technical Field

[0001] The invention provides a safety switch control part anti-self-recovery structure and method, which belong to the safety protection structure and method in a switch machine used in the field of rail transportation, and are particularly suitable for preventing the disconnected safety switch of the switch machine from automatically recovering. Background Art

[0002] Most electromechanical equipment is designed with a safety switch. When the safety switch is disconnected, the equipment cannot be powered on to protect the personal safety of maintenance personnel. Especially for remote-controlled equipment, the operator cannot observe the situation of the maintenance personnel. If an erroneous operation occurs, it may cause personal injury to the maintenance personnel. For example, the control room of the switch machine used in the rail transit field is far away from the equipment installation site. In order to prevent misoperation during maintenance, a safety switch is installed in the switch machine. When maintaining the switch machine, it is necessary to turn on the safety switch and disconnect the control power supply of the switch machine so that the erroneous operation cannot take effect. In order to improve the reliability of the safety protection function, it is necessary to prevent automatic recovery after the safety switch is disconnected.

[0003] The safety switch anti-self-recovery structure of the existing ZD6, ZDJ9 and other switch machines is installed far away from the operating position, which is not convenient for observation. At the same time, in the process of controlling the safety switch to be turned on, it is necessary to continuously maintain the action of releasing the anti-self-recovery. Usually, the machine cover can be closed only after the safety switch is turned on. Therefore, it is inconvenient to realize the interlocking relationship between the opening and closing of the machine cover and the on and off of the safety switch. Summary of the invention

[0004] The object of the present invention is to provide a safety switch control part anti-self-recovery structure and method which is easy to operate and can realize the interlocking of the opening and closing of the machine cover and the on and off of the safety switch.

[0005] The technical solution of the present invention is: a safety switch control part anti-self-recovery structure, which is characterized by: at least comprising: a fixing part, an anti-self-recovery block (or an anti-self-recovery baffle), a safety switch control part, a stop pin, a spring, and a safety switch; the safety switch control part is installed on a shaft passing through the fixing part and swings relative to the fixing part, the safety switch and the safety switch control part are located on the same side of the fixing part, and the safety switch control part is used to control the connection or disconnection of the safety switch; the stop pin is installed on the safety switch control part and can slide in the direction of approaching and moving away from the fixing part, the spring is installed between the safety switch control part and the stop pin, when the stop pin moves in the direction of moving away from the fixing part, the potential energy of the spring increases, and an anti-self-recovery block is provided on the side of the fixing part close to the safety switch control part, and the anti-self-recovery block has a stop surface and a sliding surface.

[0006] The extension surface of the stop surface intersects with the movement path of the safety switch control part. When the stop pin is blocked by the stop surface and cannot move to the side of connecting the safety switch, the safety switch control part disconnects the safety switch.

[0007] The sliding surface is bounded by the stop surface and extends in the direction of movement of the safety switch control part to connect the safety switch, until it exceeds the end position where the stop pin moves with the safety switch control part.

[0008] The anti-self-resetting stopper and the fixing piece are an integral structure or a separate structure.

[0009] The sliding surface and the stop surface are not limited to planes.

[0010] The safety switch is a split structure or an integrated structure.

[0011] The split structure safety switch is composed of a safety switch static contact group and a safety switch moving contact group. The safety switch static contact group is fixedly connected to a fixing member, and the safety switch moving contact group is fixedly connected to a safety switch control part. The safety switch control part drives the safety switch moving contact group to connect or disconnect the safety switch during its swing stroke.

[0012] The integrated safety switch has a contact or a push rod, which respectively connects or disconnects the safety switch when pressed or released, and the safety switch control part presses or releases the contact or push rod of the integrated safety switch during the swing stroke.

[0013] The safety switch control part is provided with a structure that can be locked with the machine cover. When the safety switch control part connects the safety switch, the machine cover is locked. When the safety switch control part disconnects the safety switch, the machine cover is unlocked, thereby realizing the interlocking of the safety switch on and off and the opening and closing of the machine cover.

[0014] The safety switch control part is provided with a structure that can be locked with the machine cover, the safety switch control part is a groove, and the corresponding position of the machine cover is a transverse pin that can be inserted into the groove;

[0015] Or the safety switch control part is provided with a structure that can be locked with the machine cover, the safety switch control part is a transverse pin, and the corresponding position of the machine cover is a groove that can clamp the transverse pin.

[0016] A method for preventing self-recovery of a safety switch control part: the method is characterized in that when the safety switch control part makes the safety switch reliably connected, the end of the stop pin is constrained by the sliding surface, the spring potential energy is large, the safety switch control part moves in the direction of disconnecting the safety switch, and when the stop pin moves to the stop surface, the stop pin extends out under the action of the spring and is blocked by the stop surface, and cannot move in the direction of connecting the safety switch. At this time, the safety switch is reliably disconnected, and at the same time, the safety switch control part cannot move to the side of connecting the safety switch, thereby realizing the function of preventing the safety switch from automatically recovering;

[0017] When the safety switch is manually turned on, the stop pin is manually retracted so as not to be blocked by the stop surface, and at the same time, the safety switch control part is moved in the direction of turning on the safety switch. When the end of the stop pin is constrained by the sliding surface and cannot be extended, the safety switch is prevented from automatically restoring and is released, and the subsequent movement of the safety switch control part to turn on the safety switch is not blocked;

[0018] A structure that can lock the machine cover is set on the safety switch control part. When the safety switch control part turns on the safety switch, the machine cover is locked. When the safety switch control part turns off the safety switch, the machine cover is unlocked, thereby realizing the interlocking of the safety switch on and off and the opening and closing of the machine cover.

[0019] The advantages of the present invention are: the installation position is flexible and can be installed in a place that is convenient for operation and observation. When the safety switch is turned on, the stop pin is first manually retracted, and the safety switch control part is pulled so that the stop pin passes over the stop surface and the end is constrained by the sliding surface. In this way, the anti-self-recovery state of the mechanism is manually released, and then the safety switch control part can be moved to control the safety switch to close. It can be seen that releasing the anti-self-recovery state and controlling the safety switch to close are two processes, and there is no overlap in time, which is conducive to the interlocking of the opening and closing of the machine cover and the on and off of the safety switch. The operating sequence of closing and locking the machine cover is as follows: release the anti-self-recovery state of the safety switch, close the machine cover, and lock the machine cover while turning on the safety switch; the operating sequence of opening the machine cover is as follows: disconnect the safety switch, unlock the machine cover while entering the anti-self-recovery state, and open the machine cover.

[0020] The present invention will be further described below in conjunction with the accompanying drawings of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figures 1 to 4 It is a schematic diagram of the anti-self-recovery structure of a safety switch control component in Example 1 of the present invention, and the safety switch is a split structure.

[0022] Figure 1 This is a schematic diagram of the safety switch being turned on.

[0023] Figure 2 yes Figure 1 Side view of.

[0024] Figure 3 This is a schematic diagram of the state in which the safety switch is disconnected and prevented from automatic recovery.

[0025] Figure 4 yes Figure 3 Side view of.

[0026] In the figure: 1. fixing part; 2. anti-self-resetting block (or anti-self-resetting baffle); 2-1. sliding surface; 2-2. stop surface; 3. safety switch control part; 4. stop pin; 5. spring; 6. safety switch; 6-1. safety switch static contact group; 6-2. safety switch moving contact group. DETAILED DESCRIPTION

[0027] Example 1

[0028] The present invention relates to an anti-self-recovery structure of a safety switch control part. Figures 1 to 4 As shown, it at least includes: a fixing part 1, an anti-self-resetting block (or anti-self-resetting baffle) 2, a safety switch control part 3, a stop pin 4, a spring 5, a safety switch static contact assembly 6-1, and a safety switch moving contact assembly 6-2; the safety switch control part 3 is installed on a rotating shaft passing through the fixing part 1 and swings relative to the fixing part 1, the stop pin 4 is installed on the safety switch control part 3 and can slide in the direction of approaching and moving away from the fixing part 1, the spring 5 is installed between the safety switch control part 3 and the stop pin 4, when the stop pin 4 moves in the direction away from the fixing part 1, the potential energy of the spring 5 increases, and an anti-self-resetting baffle 2 is provided on the side of the fixing part 1 close to the safety switch control part 3, and the anti-self-resetting baffle 2 has a stop surface 2-2 and a sliding surface 2-1.

[0029] The safety switch 6 is composed of a safety switch static contact group 6-1 and a safety switch moving contact group 6-2. The safety switch static contact assembly 6-1 is fixedly connected to the fixing part 1 and is located on the same side of the fixing part 1 as the safety switch control part 3. The safety switch moving contact assembly 6-2 is fixedly connected to the safety switch control part 3 and connects or disconnects the safety switch 6 as the safety switch control part 3 swings.

[0030] When the end of the stop pin 4 is constrained by the sliding surface 2-1, the stop pin 4 can move unimpeded along with the safety switch control part 3. When the end of the stop pin 4 is not constrained by the sliding surface and the stop pin 4 is blocked by the stop surface 2-2, the stop pin 4 cannot move in the direction of connecting the safety switch 6, and the safety switch control part 3 is restricted by the stop pin 4 and cannot move in the direction of connecting the safety switch 6.

[0031] The position of the stop surface 2-2 that blocks the stop pin 4 is determined by the reliable disconnection distance requirement between the safety switch moving contact group 6-2 and the safety switch static contact group 6-1.

[0032] The sliding surface 2 - 1 is bounded by the stop surface 2 - 2 and extends in the direction of movement of the safety switch control part 3 to connect the safety switch 6 , until it exceeds the end position where the stop pin 4 moves with the safety switch control part 3 .

[0033] The extension surface of the stop surface 2-2 intersects with the movement path of the safety switch control part 3. When the stop pin 4 is blocked by the stop surface 2-2 and cannot move toward the side of connecting the safety switch 6, the safety switch control part 3 keeps the safety switch 6 disconnected.

[0034] The anti-self-restoration baffle 2 and the fixing member 1 are an integral structure or a separate structure.

[0035] The sliding surface 2 - 1 and the stop surface 2 - 2 are not limited to planes.

[0036] Provide a method for preventing self-recovery of safety switch control parts, see Figure 1 and Figure 2 In the state, the safety switch 6 is turned on, the end of the stop pin 4 is constrained by the sliding surface 2-1, and can move with the safety switch control part 3. The potential energy of the spring 5 is large. When the safety switch control part 3 moves in the direction of disconnecting the safety switch 6, the safety switch moving contact group 6-2 and the stop pin 4 and other parts move with it. When the stop pin 4 moves with the safety switch control part 3 to the stop surface 2-2, it extends under the action of the potential energy of the spring 5 and is blocked by the stop surface 2-2. It cannot move with the safety switch control part 3 in the direction of connecting the safety switch 6, and the distance between the safety switch static contact group 6-1 and the safety switch moving contact group 6-2 meets the distance requirement for reliable disconnection. In this way, the function of preventing the safety switch 6 from automatically recovering is realized.

[0037] Figure 3 and Figure 4 In this state, the safety switch 6 is reliably disconnected and cannot be automatically restored. When the safety switch 6 needs to be manually restored, the stop pin 4 is manually retracted to release the blocking of the stop surface 2-2 on the stop pin 4, and the safety switch control part 3 is moved in the direction of connecting the safety switch 6. After the end of the stop pin 4 is constrained by the sliding surface 2-1, the automatic recovery function of the safety switch is prevented from being released. The safety switch control part 3 can drive the safety switch moving contact assembly 6-2 to move in the direction close to the safety switch static contact group 6-1 until the safety switch 6 is reliably connected.

[0038] A groove is provided on the safety switch control part 3, and a transverse pin is provided at the corresponding position of the machine cover. After the machine cover is closed, the safety switch control part 3 hooks the transverse pin with the groove during the rotation process of connecting the safety switch 6, so that the machine cover cannot be opened. When the safety switch control part 3 is turned to disconnect the safety switch 6, when the stop pin 4 is blocked by the stop surface 2-2, the transverse pin is separated from the groove, and the machine cover can be opened. In this way, the machine cover is locked when the safety switch 6 is connected, and unlocked when the safety switch 6 is disconnected. After the machine cover is locked, the safety switch 6 must be disconnected before opening the machine cover. Finally, the on and off of the safety switch 6 and the opening and closing of the machine cover have an interlocking relationship to ensure safety.

[0039] Example 2

[0040] The safety switch 6 is an integrated structure, fixedly mounted on the fixing member 1, and its contact or push rod is pressed or released to connect or disconnect the safety switch 6. The rest of the structure is similar to that of the embodiment 1, the safety switch control part 3 is fixedly mounted on the shaft passing through the fixing member 1, and can swing around the shaft relative to the fixing member 1, and the contact or push rod of the safety switch 6 is pressed or released during the swing stroke, thereby controlling the safety switch 6 to connect or disconnect, and the rest is the same as that of the embodiment 1, and will not be described again.

Claims

1. A safety switch control part anti-self-recovery structure, characterized in that: at least include: A fixing part (1), an anti-self-resetting block (2), a safety switch control part (3), a stop pin (4), a spring (5), and a safety switch (6); the safety switch control part (3) is mounted on a shaft passing through the fixing part (1) and swings relative to the fixing part (1); the safety switch (6) and the safety switch control part (3) are located on the same side of the fixing part (1); the safety switch control part (3) is used to control the connection or disconnection of the safety switch (6); the stop pin (4) is mounted on the safety switch control part (3) and can slide in a direction approaching or away from the fixing part (1); the spring (5) is mounted between the safety switch control part (3) and the stop pin (4); when the stop pin (4) moves in a direction away from the fixing part (1), the potential energy of the spring (5) increases, and the fixing part (1) close to the safety switch control part (3) is moved. An anti-self-resetting block (2) is provided on one side of the safety switch control part (3), and the anti-self-resetting block (2) has a stop surface (2-2) and a sliding surface (2-1); an extension surface of the stop surface (2-2) intersects with the movement path of the safety switch control part (3); when the stop pin (4) is blocked by the stop surface (2-2) and cannot move toward the side of connecting the safety switch (6), the safety switch control part (3) disconnects the safety switch (6); the sliding surface (2-1) extends in the movement direction of the safety switch control part (3) connecting the safety switch (6) with the stop surface (2-2) as a boundary, to a terminal position beyond which the stop pin (4) moves with the safety switch control part (3); the anti-self-resetting block (2) and the fixing part (1) are an integral structure or a split structure; the sliding surface (2-1) and the stop surface (2-2) are not limited to planes.

2. The anti-self-recovery structure of a safety switch control component according to claim 1, characterized in that: The safety switch (6) is a split structure or an integrated structure.

3. The anti-self-recovery structure of a safety switch control component according to claim 2, characterized in that: The split-structure safety switch (6) is composed of a safety switch static contact group (6-1) and a safety switch moving contact group (6-2); the safety switch static contact group (6-1) is fixedly connected to a fixing member (1); the safety switch moving contact group (6-2) is fixedly connected to a safety switch control component (3); and the safety switch control component (3) drives the safety switch moving contact group (6-2) to connect or disconnect the safety switch (6) during its swing stroke.

4. The anti-self-recovery structure of a safety switch control component according to claim 2, characterized in that: The integral safety switch (6) has a contact or a push rod, which respectively connects or disconnects the safety switch (6) when pressed or released, and the safety switch control component (3) presses or releases the contact or the push rod of the integral safety switch (6) during the swing stroke.

5. The anti-self-recovery structure of a safety switch control component according to claim 1, characterized in that: The safety switch control part (3) is provided with a structure capable of locking with the machine cover, the safety switch control part (3) is provided with a groove, and a corresponding position of the machine cover is provided with a transverse pin capable of being inserted into the groove; Alternatively, a structure capable of locking with the machine cover is provided on the safety switch control part (3), a transverse pin is provided on the safety switch control part (3), and a groove capable of locking the transverse pin is provided at a corresponding position of the machine cover.

6. A method for preventing self-recovery of a safety switch control part: characterized by: When the safety switch control part (3) causes the safety switch (6) to be reliably connected, the end of the stop pin (4) is constrained by the sliding surface, the potential energy of the spring (5) is large, the safety switch control part (3) moves in the direction of disconnecting the safety switch (6), and when the stop pin (4) moves to the stop surface, the stop pin (4) extends under the action of the spring (5) and is blocked by the stop surface and cannot move in the direction of connecting the safety switch (6). At this time, the safety switch (6) is reliably disconnected. At the same time, the safety switch control part (3) cannot move to the side of connecting the safety switch, thereby achieving the function of preventing the safety switch (6) from automatically recovering. When the safety switch (6) is manually turned on, the stop pin (4) is manually retracted so as not to be blocked by the stop surface, and at the same time, the safety switch control part (3) is moved in the direction of turning on the safety switch (6). When the end of the stop pin (4) is restrained by the sliding surface and cannot be extended, the safety switch (6) is prevented from automatically recovering and is released, and the subsequent movement of the safety switch (6) control part to turn on the safety switch (6) is not blocked; A structure capable of locking the machine cover is provided on the safety switch control part (3). When the safety switch control part (3) is connected to the safety switch (6), the machine cover is locked. When the safety switch control part (3) is disconnected from the safety switch (6), the machine cover is unlocked. Thus, the interlocking of the on and off of the safety switch (6) and the opening and closing of the machine cover is achieved.

Images