Remote reset travel switch

Abstract

The utility model discloses a kind of remote reset travel switches, including switch main body, switch main body inside one side is equipped with movable contact component and fixed contact component, switch main body inside other side is equipped with electromagnetic reset component, and travel push rod component is inserted in the end of switch main body.The utility model, motion push rod is through switch main body and the abutment of movable point board support one end, motion push rod is equipped with metal ring cover, metal ring cover outside is equipped with trigger wire, so that trigger wire and metal ring cover are connected, trigger mode uses trigger wire and metal ring cover cooperation, can effectively improve the sensitivity of travel switch;And increase a group of remote trigger reset electromagnetic reset component, travel switch can control motor small shaft under remote signal after triggering, drive movable point board support movement recovery to contact closure state simultaneously drive motion push rod to recover to initial travel state, without operating personnel to go to the scene and operate reset.

Description

Technical Field

[0001] This utility model relates to the field of limit switch technology, specifically to a remote reset limit switch. Background Technology

[0002] Limit switches are electrical components that are triggered by mechanical contact to control the on / off state of a circuit. Their core function is to monitor the position or travel of mechanical movement. When the moving part of a mechanical device touches its operating head, the internal contacts switch quickly, enabling functions such as limit protection, automatic reversing, or stopping of the device. They are widely used in industrial scenarios such as machine tools, elevators, conveyors, and automated production lines.

[0003] The existing limit switches require manual reset on-site. When the limit switch is installed in an unreasonable position, it can lead to inconvenience in operation or failure to reset properly.

[0004] The existing limit switches adopt a manual reset operation mode on site. That is, after being triggered, the operator needs to perform a reset action on the switch directly on the equipment site to restore it to the ready-to-trigger state. This reset method has strict requirements on the installation position of the switch. If the installation position is not planned properly, it will lead to inconvenience in operation or failure to reset normally. Tools or posture adjustments are required to access the reset component, which increases the operation time and difficulty, and thus affects the normal start-up, shutdown, and reversing functions of the equipment, causing production interruption or safety risks. Utility Model Content

[0005] The purpose of this utility model is to provide a remote reset limit switch in order to solve the above problems.

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution, including: A moving contact assembly and a fixed contact assembly are installed on one side inside the switch body, an electromagnetic reset assembly is installed on the other side inside the switch body, and a travel push rod assembly is inserted into the end of the switch body; The moving contact assembly includes a moving contact plate bracket, a moving contact plate is installed inside the moving contact plate bracket along a first direction, and a moving contact spring is installed on the moving contact plate, so that the moving contact plate has a movement path along the first direction; The fixed contact assembly includes a fixed contact plate bracket, and a combination screw is installed on the fixed contact plate bracket along the second direction, such that the bottom of the combination screw abuts against the side of the moving contact plate. The electromagnetic reset assembly includes a small motor shaft, which abuts against one end of the moving point plate bracket along a first direction, so that the small motor shaft has a movement path along the first direction; The stroke push rod assembly includes a motion push rod, which passes through the switch body and abuts against the other end of the moving point plate bracket. The motion push rod is fitted with a metal ring sleeve, and a trigger wire is installed on the outside of the metal ring sleeve along a third direction, so that the trigger wire is engaged with the metal ring sleeve.

[0007] As a further description of the above technical solution, the moving point plate bracket has a motion cavity inside along the first direction, and the moving point plate bracket has a motion groove on its side.

[0008] As a further description of the above technical solution, the moving point plate bracket is provided with a moving point plate cover plate inserted from the top along the second direction, and the two ends of the moving point plate cover plate respectively abut against a set of moving contact springs.

[0009] As a further description of the above technical solution, moving contacts are installed on both sides of the moving contact plate, and a stationary contact is provided at the bottom of the combined screw. The moving contact extends through the moving groove and abuts against the stationary contact.

[0010] As a further description of the above technical solution, the bottom of the moving point plate bracket is provided with a sliding groove, and a bracket spring is installed in the sliding groove along the first direction, so that the moving point plate bracket has a movement path along the first direction.

[0011] As a further description of the above technical solution, the end of the motor shaft passes through the motor housing and abuts against the moving point plate bracket, and a motor cover plate is installed at the end of the motor housing away from the moving point plate bracket.

[0012] As a further description of the above technical solution, a motor armature is sleeved in the middle of the motor shaft, a coil frame is sleeved on the outside of the motor armature, and an electromagnetic coil is wound around the outside of the coil frame.

[0013] As a further description of the above technical solution, an elastic sleeve is fitted on the end of the motion push rod away from the moving point plate bracket, and the elastic sleeve is engaged with the switch body.

[0014] As a further description of the above technical solution, a metal collar is fitted at one end of the motion push rod near the moving point plate bracket, and the metal collar is engaged with the trigger wire.

[0015] As a further description of the above technical solution, a switch cover plate is detachably installed on the top of the switch body, and a sealing gasket is attached to the inner side of the switch cover plate.

[0016] The beneficial effects of this utility model are as follows: 1. In this utility model, the motion push rod passes through the main body of the switch and abuts against one end of the moving point plate bracket. The motion push rod is fitted with a metal ring sleeve, and a trigger wire is installed on the outside of the metal ring sleeve, so that the trigger wire is engaged with the metal ring sleeve. The triggering method adopts the cooperation of the trigger wire and the metal ring sleeve, which can effectively improve the sensitivity of the limit switch. In addition, a set of remote triggering and resetting electromagnetic reset components is added. After the limit switch is triggered, it can control the motor shaft under the remote signal, drive the moving point plate bracket to move back to the contact closed state, and drive the motion push rod back to the initial stroke state at the same time, without the need for the operator to go to the site to perform operation and reset. 2. In this utility model, the bottom of the combination screw of the fixed contact assembly abuts against the side of the moving contact plate of the moving contact assembly, so that the contact remains in a normally closed state in the initial state, and multiple wiring methods can be added by the combination screw for users to choose from.

[0017] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the remote reset limit switch of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the remote reset limit switch of this utility model. Figure 2 ; Figure 3 This is a top view of the remote reset limit switch of this utility model; Figure 4 This is a front view of the remote reset limit switch of this utility model; Figure 5 This is a schematic diagram of the structure of the remote reset limit switch of this utility model. Figure 3 ; Figure 6 This is a schematic diagram of the structure of the remote reset limit switch of this utility model. Figure 4 ; Figure 7 This is the main view of the remote reset limit switch of this utility model. Figure 3 ; Figure 8 This is the main view of the remote reset limit switch of this utility model. Figure 4 ; Figure 9 yes Figure 4 Sectional view at point AA; Figure 10 This is an exploded view of the remote reset limit switch of this utility model.

[0019] Figure label: 1. Switch body; 11. Switch cover plate; 12. Sealing gasket; 2. Moving contact assembly; 21. Moving contact plate bracket; 211. Moving cavity; 212. Moving groove; 213. Sliding groove; 22. Moving contact plate; 23. Moving contact spring; 24. Moving contact plate cover plate; 25. Moving contact; 26. Bracket spring; 3. Fixed contact assembly; 31. Fixed contact plate bracket; 32. Combination screw; 33. Fixed contact; 4. Electromagnetic reset assembly; 41. Motor shaft; 42. Motor housing; 43. Motor armature; 44. Coil frame; 45. Electromagnetic coil; 46. Motor cover plate; 5. Stroke push rod assembly; 51. Moving push rod; 52. Metal ring; 53. Trigger wire; 54. Elastic sleeve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0021] like Figures 1-10 As shown, in one embodiment, a remote reset limit switch includes a switch body 1; wherein, a moving contact assembly 2 and a fixed contact assembly 3 for control circuit on / off control are installed on one side inside the switch body 1, an electromagnetic reset assembly 4 for remote reset drive is installed on the other side inside the switch body 1, and a limit push rod assembly 5 for receiving external trigger signals is inserted at the end of the switch body 1.

[0022] It should be noted that the top of the switch body 1 adopts a detachable switch cover plate 11 design. A sealing gasket 12 is tightly attached to the inside of the cover plate, which not only facilitates the later inspection and maintenance of internal components, but also effectively isolates external dust, moisture and other impurities through the sealing gasket 12, ensuring the stable operation of internal components.

[0023] For example, the moving contact assembly 2 includes a moving contact plate bracket 21, the interior of which is located along a first direction (in... Figure 9 Specifically, a movable contact plate 22 is installed along the X-axis direction, and a movable contact spring 23 is installed in the middle of the movable contact plate 22, so that the movable contact plate 22 has a movement path along the first direction; Correspondingly, the fixed contact assembly 3 includes a fixed contact plate bracket 31, with the fixed contact plate bracket 31 extending along the second direction (in... Figure 9 A combination screw 32 is installed along the Y-axis, so that the bottom of the combination screw 32 abuts against the side of the moving contact plate 22. It should be explained in detail that the interior of the moving point plate bracket 21 along the first direction (in) Figure 9Specifically, a motion cavity 211 is provided along the X-axis to provide a motion guide space for the movement of the moving contact plate 22; correspondingly, a motion groove 212 is provided on the side of the moving contact plate bracket 21 to serve as a motion channel for the extended structure on the moving contact plate 22, and can accurately guide its motion trajectory to avoid deviation of the contact motion trajectory.

[0024] In some embodiments, the motion cavity 211 is a cylindrical hollow cavity opened along the first direction, and a mounting groove is provided at the top so that the moving point plate cover 24 can be installed from the top; and the outline of the mounting groove fits the outer outline of the moving point plate cover 24 so that the moving point plate cover 24 can enter the moving point plate bracket 21 vertically downward according to a preset path value.

[0025] Furthermore, the moving point plate bracket 21 extends from the top along the second direction (in... Figure 9 Specifically, a moving point plate cover 24 is inserted along the Y-axis. Both ends of the moving point plate cover 24 abut against a set of moving contact springs 23, which facilitates the quick installation and removal of the moving point plate cover 24 and can form a stable pressure constraint on the moving contact springs 23.

[0026] In some embodiments, the moving point plate cover 24 includes a plug-in portion, with abutment portions extending from both ends of the plug-in portion, and a set of cylindrical guide grooves corresponding to both ends of the moving point plate bracket 21, so that the stroke push rod assembly 5 and the electromagnetic reset assembly 4 can abut against the abutment portions of the moving point plate cover 24 through the guide grooves.

[0027] Furthermore, moving contacts 25 are installed on both sides of the moving contact plate 22, and the bottom of the combination screw 32 is along a third direction (in Figure 9 Specifically, a stationary contact 33 is provided extending along the Z-axis direction, and a moving contact 25 extends through the moving groove 212 and abuts against the stationary contact 33.

[0028] Furthermore, a sliding groove 213 is provided at the bottom of the moving point plate bracket 21, and the sliding groove 213 is along the first direction (in Figure 9 Specifically, a bracket spring 26 is installed along the X-axis direction, so that the moving point plate bracket 21 has a movement path along the first direction.

[0029] It is understandable that the bottom of the combination screw 32 of the fixed contact assembly 3 abuts against the side of the moving contact plate 22 of the moving contact assembly 2, keeping the contact in a normally closed state in the initial state. Moreover, the combination screw 32 can be used to support multiple outgoing cable methods, meet the wiring needs in different scenarios, and improve the versatility and installation flexibility of the equipment.

[0030] Please continue reading. Figures 1-10 In this embodiment, the electromagnetic reset assembly 4 includes a motor shaft 41, which runs along a first direction (in... Figure 9Specifically, along the X-axis direction, the small shaft of the motor 41 abuts against one end of the moving point plate bracket 21, so that the small shaft of the motor 41 has a movement path along the first direction; For example, the end of the motor shaft 41 passes through the motor housing 42 and abuts against the moving point plate bracket 21. The end of the motor housing 42 away from the moving point plate bracket 21 is equipped with a motor cover plate 46, which can effectively fix the internal components and prevent them from becoming loose during movement.

[0031] Furthermore, a motor armature 43 is sleeved in the middle of the motor shaft 41, a coil frame 44 is sleeved on the outside of the motor armature 43, and an electromagnetic coil 45 is wound around the outside of the coil frame 44. It is understandable that when current is applied to the electromagnetic coil 45 via a remote signal, an electromagnetic field is generated, which in turn attracts the motor armature 43 to move axially, and simultaneously drives the motor shaft 41 to move along the first direction (in... Figure 9 Specifically, it moves along the X-axis; the coil frame 44 here can both fix the electromagnetic coil 45 and isolate the coil from the armature through insulating material to avoid the risk of short circuit and ensure the safety and stability of electromagnetic drive.

[0032] Please continue reading. Figures 1-10 In this embodiment, the stroke push rod assembly 5 includes a motion push rod 51, which passes through the switch body 1 and abuts against the other end of the moving point plate bracket 21. A metal ring sleeve 52 is fitted onto the motion push rod 51, and the outer surface of the metal ring sleeve 52 extends along a third direction (in... Figure 9 A trigger wire 53 is installed along the Z-axis, so that the trigger wire 53 is engaged with the metal ring 52 along the third direction.

[0033] For example, an elastic sleeve 54 is fitted on the end of the motion push rod 51 away from the moving point plate bracket 21, and the elastic sleeve 54 is snapped into the switch body 1; Understandably, the elastic sleeve 54 can seal the through gap between the push rod and the switch body 1 to prevent dust and liquid from entering the interior; and it can also act as a buffer when the push rod 51 moves, reducing the damage of external impact to the internal components, while reducing the noise when the push rod resets.

[0034] Furthermore, a metal collar is fitted onto one end of the motion push rod 51 near the moving point plate bracket 21, and the metal collar is engaged with the trigger wire 53.

[0035] It is understandable that when the motion push rod 51 is subjected to an external impact force, the metal collar will move synchronously, thereby changing the engagement state of the trigger wire 53; when the reverse movement is driven by the motor shaft 41, the position state of the metal collar and the trigger wire 53 will be reset.

[0036] Working principle: The motion push rod 51 passes through the switch body 1 and abuts against one end of the moving point plate bracket 21. The motion push rod 51 is fitted with a metal ring 52, and a trigger wire 53 is installed on the outside of the metal ring 52, so that the trigger wire 53 is engaged with the metal ring 52. The triggering method uses the cooperation of the trigger wire 53 and the metal ring 52, which can effectively improve the sensitivity of the limit switch. When the limit switch is triggered, there is no need for the operator to go to the site. Just control the electromagnetic coil 45 to be energized through the remote signal, which can drive the motor shaft 41 to push the moving point plate bracket 21 to move in the first direction. During this process, the moving point plate bracket 21 is simultaneously driven to move and reset, so that the contacts are restored to the closed state. The motion push rod 51 is also pushed back to the initial position, completing the reset operation of the entire switch.

[0037] Through the above technical solution, this application solves the problem of inconvenience in operation or inability to reset traditional manual reset limit switches due to unreasonable installation position, and significantly improves the automation level and operation and maintenance efficiency of the equipment.

[0038] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A remote reset limit switch, comprising a switch body (1), characterized in that: The switch body (1) has a moving contact assembly (2) and a fixed contact assembly (3) installed on one side inside, and an electromagnetic reset assembly (4) installed on the other side inside. The switch body (1) has a stroke push rod assembly (5) inserted at the end. The moving contact assembly (2) includes a moving contact plate bracket (21), a moving contact plate (22) is installed inside the moving contact plate bracket (21) along a first direction, and a moving contact spring (23) is installed on the moving contact plate (22) so that the moving contact plate (22) has a movement path along the first direction; The fixed contact assembly (3) includes a fixed contact plate bracket (31), and a combination screw (32) is installed on the fixed contact plate bracket (31) along the second direction, such that the bottom of the combination screw (32) abuts against the side of the moving contact plate (22); The electromagnetic reset assembly (4) includes a motor shaft (41), which abuts against one end of the moving point plate bracket (21) along a first direction, so that the motor shaft (41) has a movement path along the first direction; The stroke push rod assembly (5) includes a motion push rod (51), which passes through the switch body (1) and abuts against the other end of the moving point plate bracket (21). The motion push rod (51) is fitted with a metal ring sleeve (52), and a trigger wire (53) is installed on the outside of the metal ring sleeve (52) along a third direction, so that the trigger wire (53) is engaged with the metal ring sleeve (52).

2. The remote reset limit switch according to claim 1, characterized in that, The moving point plate bracket (21) has a motion cavity (211) inside along the first direction, and a motion groove (212) is provided on the side of the moving point plate bracket (21).

3. The remote reset limit switch according to claim 2, characterized in that, The moving point plate bracket (21) is provided with a moving point plate cover plate (24) inserted from the top along the second direction. Both ends of the moving point plate cover plate (24) abut against a set of moving contact springs (23).

4. The remote reset limit switch according to claim 1, characterized in that, The moving contact plate (22) has moving contacts (25) extending from both sides, and the combination screw (32) has a stationary contact (33) extending from the bottom. The moving contact (25) extends through the moving groove (212) and abuts against the stationary contact (33).

5. The remote reset limit switch according to claim 3, characterized in that, The bottom of the moving plate bracket (21) is provided with a sliding groove (213), and a bracket spring (26) is installed in the sliding groove (213) along the first direction, so that the moving plate bracket (21) has a movement path along the first direction.

6. The remote reset limit switch according to claim 1, characterized in that, The end of the motor shaft (41) passes through the motor housing (42) and abuts against the moving point plate bracket (21). A motor cover plate (46) is installed at the end of the motor housing (42) away from the moving point plate bracket (21).

7. The remote reset limit switch according to claim 6, characterized in that, The motor armature (43) is sleeved in the middle of the motor shaft (41), and a coil frame (44) is sleeved on the outside of the motor armature (43). An electromagnetic coil (45) is wound on the outside of the coil frame (44).

8. The remote reset limit switch according to claim 1, characterized in that, The end of the motion push rod (51) away from the moving point plate bracket (21) is fitted with an elastic sleeve (54), and the elastic sleeve (54) is engaged with the switch body (1).

9. The remote reset limit switch according to claim 8, characterized in that, The end of the motion push rod (51) near the moving point plate bracket (21) is fitted with a metal collar, which is engaged with the trigger wire (53).

10. The remote reset limit switch according to claim 1, characterized in that, The top of the switch body (1) is detachably fitted with a switch cover plate (11), and a sealing gasket (12) is attached to the inside of the switch cover plate (11).

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