Anti-misoperation device of vacuum electromagnetic starter

Abstract

The utility model relates to the technical field of vacuum electromagnetic starters, in particular to an anti-misoperation device of a vacuum electromagnetic starter. Comprising a switch shell, a rotatable operation board is installed on the upper surface of the switch shell, an operation handle is fixedly connected to the upper surface of the operation board, a plurality of sawtooth-shaped teeth are arranged on the peripheral surface of the operation board, a groove is formed between every two adjacent sawtooth-shaped teeth, and a non-return claw is connected to the switch shell through a pin shaft. One end of the non-return claw is arranged between two adjacent zigzag teeth, and a positioning piece is arranged on the switch shell and located on one side of the non-return claw; the saw-toothed teeth with the steep upper inclined surfaces and the smooth lower inclined surfaces are arranged on the peripheral surface of the operation panel and are matched with the check claws and the springs for use, so that the operation handle can be controlled to clockwise rotate to the initial position in the whole circumferential direction in the whole stroke, frequent forward and reverse rotation staggered operation of the operation handle is avoided, and the operation efficiency is improved. The reaction speed and the working efficiency of the equipment are improved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum electromagnetic starters, in particular to a device for preventing misoperation of a vacuum electromagnetic starter. Background Art

[0002] Vacuum electromagnetic starters are widely used in underground coal mines and other environments with explosive gas mixtures. When the vacuum electromagnetic starter is operating normally, the direction operating handle is in the forward gear. Reverse gear is sometimes required during maintenance. Inadvertent operation can easily cause the direction operating handle to be moved to the reverse gear, which can lead to low equipment efficiency or even damage.

[0003] The Chinese patent with patent number CN201720712032.3 discloses an anti-misoperation device for a mine explosion-proof vacuum electromagnetic starter, including a threaded hole, a circular plug, a connecting rod, a slider, a slide groove, a hollow cavity, a threaded rod, a fixing nut, a needle rod one, a parallel rod and a needle rod two. The hollow cavity is arranged on the lower side of the threaded hole, the circular plug is assembled in the threaded hole, the slider is assembled on the slide groove, the left end of the connecting rod passes through the slide groove and is connected to the circular plug. This design achieves the purpose of real-time sealing of the connection part of the utility model. The threaded rod is assembled in the fixing nut, the front end of the needle rod one is installed on the left side of the annular side of the parallel rod, and the rear end of the needle rod one is in contact with the threaded rod, the front end of the needle rod two is installed on the right side of the annular side of the parallel rod, and the rear end of the needle rod two is in contact with the threaded rod. Although the above patent can prevent the operating handle from being operated in reverse, when the operating handle is rotated forward to a position close to the initial position, it is blocked by the threaded rod and needs to be rotated back to the initial position. Therefore, the operating handle still needs to be frequently operated in a forward and reverse manner, and the device needs to continuously switch instructions in an alternating manner, which prolongs the response time of the device and reduces the service life of the device. Utility Model Content

[0004] In response to the deficiencies in the prior art, the utility model provides a vacuum electromagnetic starter anti-misoperation device that can control the operating handle to rotate clockwise along the entire circumferential direction and return to the initial position. The operation is convenient and labor-saving, the equipment has a high response speed, high working efficiency and a long service life.

[0005] In order to achieve the above technical objectives, the present invention proposes the following technical solutions: a vacuum electromagnetic starter anti-misoperation device, comprising a switch housing, a rotatable operating disk mounted on the upper surface of the switch housing, an operating handle fixed to the upper surface of the operating disk, a plurality of serrated teeth provided on the outer peripheral surface of the operating disk, a groove formed between two adjacent serrated teeth, a non-return claw connected to the switch housing by a pin shaft, one end of the non-return claw being arranged in the groove, a positioning piece being provided on the switch housing and located on one side of the non-return claw, and the positioning piece and the non-return claw being connected by a spring.

[0006] Furthermore, the sawtooth teeth have a steep upper slope and a gentle lower slope.

[0007] Furthermore, the anti-return pawl is an arc-shaped structure, and the spring is located on the side of the anti-return pawl away from the center of the circle. The positioning member includes a limit frame, a limit plate, and a positioning rod. The limit plate is disposed within the limit frame, one side of the limit plate is connected to the spring, and the other side of the limit plate is rotatably connected to the positioning rod. The limit frame has a threaded hole at one end away from the spring, and the positioning rod has an external thread that matches the threaded hole, and the positioning rod is installed in the threaded hole.

[0008] Furthermore, one end of the positioning rod away from the limiting plate is connected to a handle.

[0009] Compared with the prior art, the beneficial effects produced by the present invention are: the present invention has a novel structure, ingenious conception, simple and convenient operation, and has the following advantages compared with the prior art: by arranging serrated teeth with a steep upper slope and a gentle lower slope on the outer surface of the operating disk, and cooperating with the check claw and the spring, the operating handle can be controlled to rotate clockwise along the entire circumferential direction to return to the initial position, avoiding the need for frequent forward and reverse alternating operations of the operating handle, improving the response speed and work efficiency of the equipment, and extending the service life; through the mutual cooperation of structures such as the limit frame, the limit plate, and the positioning rod, convenience is provided for rotating the operating handle counterclockwise during later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a front structural schematic diagram of the utility model;

[0012] Figure 3 This is a schematic diagram of the internal structure of the positioning member on the other side of the utility model;

[0013] Figure 4 It is an enlarged view of the structure of point A of the present utility model.

[0014] In the figure, 1. switch housing; 2. operating panel; 3. operating handle; 4. serrated teeth; 41. upper inclined surface; 42. lower inclined surface; 5. groove; 6. pin; 7. check claw; 8. positioning member; 81. limit frame; 82. limit plate; 83. positioning rod; 84. threaded hole; 85. handle; 9. spring. DETAILED DESCRIPTION

[0015] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments. It should be noted that the descriptions of the directions such as up and down, left and right in the present embodiment are based on the accompanying drawings. Figure 1 The position relationship is described in .

[0016] like Figure 1-4 As shown, the utility model provides a device for preventing misoperation of a vacuum electromagnetic starter, comprising a switch housing 1, a rotatable operating disk 2 being mounted on the upper surface of the switch housing 1, an operating handle 3 being fixed to the upper surface of the operating disk 2, a plurality of serrated teeth 4 being provided on the right outer peripheral surface of the operating disk 2, a groove 5 being formed between two adjacent serrated teeth 4, a non-return claw 7 being connected to the switch housing 1 via a pin 6, one end of the non-return claw 7 being arranged in the groove 5, a positioning member 8 being provided on the switch housing 1 and located on one side of the non-return claw 7, the positioning member 8 being connected to the non-return claw 7 via a spring 9, the serrated teeth 4 having a steep upper inclined surface 41 and a gentle lower inclined surface 42, so that the groove 5 also has a steep upper inclined surface 41 and a gentle lower inclined surface 42.

[0017] like Figure 1 and 2 As shown, the operating disk 2 moves with the movement of the operating handle 3, and one end of the anti-return pawl 7 is stuck in the groove 5 to limit the rotation of the operating handle 3. By setting the serrated teeth 4 to a steep upper inclined surface 41 and a gentle lower inclined surface 42, the operating handle 3 can be limited to rotate only in the clockwise direction. Specifically, when the operating handle 3 drives the operating disk 2 to try to rotate counterclockwise, the anti-return pawl 7 will contact the steep upper inclined surface 41, preventing the operating disk 2 from rotating counterclockwise. In this way, even if an external force is used to drive the operating handle 3 to rotate counterclockwise, the anti-return pawl 7 can effectively prevent such movement, thereby ensuring that the operating handle 3 and the operating disk 2 can only rotate in the clockwise direction. When the operating handle 3 is rotated in the clockwise direction, the operating disk 2 is driven to rotate clockwise, so that the serrated teeth 4 also rotate clockwise, and the non-return claw 7 is pushed along the gentle lower slope 42 of a groove 5 into the next groove 5 or directly pushed onto the outer surface of the operating disk 2, that is, the non-return claw 7 automatically slides from one groove 5 to another groove 5 or the outer peripheral surface of the operating disk 2 under the action of the spring 9. In this embodiment, the thickness of the non-return claw 7, the spring, and the positioning member 8 does not prevent the rotation of the operating handle 3. During the entire operation, the operating handle 3 can only be rotated in the clockwise direction to its original position, so there is no need to reverse the operating handle, which improves operating efficiency and extends service life.

[0018] The anti-return claw 7 is an arc-shaped structure, and the spring 9 is located on the side of the anti-return claw 7 away from the center of the circle.

[0019] like Figure 1As shown, when the operating handle 3 rotates in the clockwise direction, one end of the anti-return claw 7 moves along the gentle lower slope 42. The gentle lower slope 42 will push the anti-return claw 7 to move as the operating disk 2 rotates. The anti-return claw 7 pushes the spring 9, causing the spring 9 to be compressed. When one end of the anti-return claw 7 is stuck in the groove 5, the spring 9 is reset.

[0020] The positioning member 8 includes a limit frame 81, a limit plate 82 and a positioning rod 83. The limit plate 82 is arranged in the limit frame 81. One side of the limit plate 82 is connected to the spring 9, and the other side of the limit plate 82 is rotatably connected to the positioning rod 83. A threaded hole 84 is provided at one end of the limit frame 81 away from the spring 9, and an external thread matching the threaded hole 84 is provided on the end of the positioning rod 83 away from the limit plate 82. The positioning rod 83 is installed in the threaded hole 84.

[0021] like Figure 3 and 4 As shown, since the vacuum electromagnetic starter sometimes needs to reverse the gear during maintenance, the positioning member 8 can be used to control the operating handle 3 and the operating disk 2 to rotate counterclockwise. Specifically, when the vacuum electromagnetic starter is in normal use, the external threaded portion on the positioning rod 83 is threadedly connected to the threaded hole 84, and the positioning rod 83 and the limit plate 82 support the spring 9 without affecting the normal use of the operating handle 3 rotating in the clockwise direction; if the non-return claw 7 is in the groove 5, when the operating handle 3 needs to be rotated counterclockwise for maintenance, the positioning rod 83 can be twisted first so that the external threaded end of the positioning rod 83 is disengaged from the threaded hole 84. At this time, the positioning rod 83 The external threaded end of the rod 83 is outside the limit frame 81, and the part of the positioning rod 83 without external threads can slide in the threaded hole 84. Then, the operating handle 3 is rotated slightly clockwise so that the non-return claw 7 contacts the gentle lower inclined surface 42 and begins to squeeze the spring 9. Then, the positioning rod 83 is pulled down to disengage one end of the non-return claw 7 from the groove 5. External force is applied to the end of the positioning rod 83 away from the spring 9, so that the spring 9 is stretched. The spring 9 drives the non-return claw 7 to move toward the limit frame 81, so that the non-return claw 7 is away from the serrated teeth 4 on the operating panel 2. In this way, the gear can be reversed counterclockwise, which is convenient for maintenance work.

[0022] One end of the positioning rod 83 away from the limiting plate 82 is connected to a handle 85 .

[0023] like Figure 2 As shown, the handle 85 provides a fulcrum for pulling the positioning rod 83 , making it easier to pull the positioning rod 83 .

[0024] Principle of use: When the user needs to turn the operating handle 3 clockwise, he only needs to turn the operating handle 3, and the operating handle 3 drives the operating disk 2 to drive the serrated teeth 4 to rotate clockwise. The non-return claw 7 in the groove 5 eventually falls into the outer peripheral surface of the operating disk 2 along the gentle lower slope 42, and the non-return claw 7 slides relative to the outer peripheral surface of the operating disk 2. If an external force is used to pull the operating handle 3 counterclockwise, one end of the non-return claw 7 in the groove 5 will contact the steep upper slope 41, preventing the operating disk 2 from rotating counterclockwise. In this way, even if an external force is used to drive the operating handle 3 to rotate counterclockwise, the non-return claw 7 can effectively prevent this movement, thereby ensuring that the operating handle 3 and The operating disk 2 can only be rotated in the clockwise direction, so that the operating handle 3 can be controlled to rotate clockwise along the entire circumferential direction throughout the entire stroke; if the operating handle 3 needs to be rotated counterclockwise during maintenance, if the non-return claw 7 is in the groove 5, first screw the positioning rod 83 to disengage the external threaded end of the positioning rod 83 from the threaded hole 84, and then rotate the operating handle 3 slightly clockwise so that the non-return claw 7 contacts the gentle lower inclined surface 42 and begins to squeeze the spring 9. Pull down the positioning rod 83 to disengage one end of the non-return claw 7 from the groove 5 and move away, and at the same time rotate the operating handle 3 counterclockwise, so that the non-return claw 7 will not block the counterclockwise operation of the operating handle 3, nor will it affect subsequent maintenance work.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art may make various modifications, additions, or substitute similar methods to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A device for preventing misoperation of a vacuum electromagnetic starter, characterized in that: The invention comprises a switch housing (1), a rotatable operating disk (2) is mounted on the upper surface of the switch housing (1), an operating handle (3) is fixed to the upper surface of the operating disk (2), a plurality of sawtooth-shaped teeth (4) are provided on the outer peripheral surface of the operating disk (2), a groove (5) is formed between two adjacent sawtooth-shaped teeth (4), a non-return claw (7) connected to the switch housing (1) via a pin (6), one end of the non-return claw (7) is arranged in the groove (5), a positioning member (8) is provided on the switch housing (1) and located on one side of the non-return claw (7), and the positioning member (8) and the non-return claw (7) are connected via a spring (9).

2. The device for preventing misoperation of a vacuum electromagnetic starter according to claim 1, characterized in that: The sawtooth teeth (4) have a steep upper slope (41) and a gentle lower slope (42).

3. The device for preventing misoperation of a vacuum electromagnetic starter according to claim 1, characterized in that: The anti-return claw (7) is an arc-shaped structure, and the spring (9) is located on the side of the anti-return claw (7) away from the center of the circle.

4. The device for preventing misoperation of a vacuum electromagnetic starter according to claim 1, characterized in that: The positioning member (8) includes a limit frame (81), a limit plate (82) and a positioning rod (83). The limit plate (82) is arranged in the limit frame (81). One side of the limit plate (82) is connected to the spring (9), and the other side of the limit plate (82) is rotatably connected to the positioning rod (83). A threaded hole (84) is provided at one end of the limit frame (81) away from the spring (9). The positioning rod (83) is provided with an external thread that matches the threaded hole (84). The positioning rod (83) is installed in the threaded hole (84).

5. The device for preventing misoperation of a vacuum electromagnetic starter according to claim 4, characterized in that: One end of the positioning rod (83) away from the limiting plate (82) is connected to a handle (85).

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