Protective device for safety tongs of elevator car

Abstract

The elevator car safety tongs protection device comprises a car frame and a motor support, the motor support and the side wall of the car frame are fixedly installed, a threaded rod is fixedly connected to the end, close to the car frame, of the exterior of the motor support, a blind hole is formed in the end, away from the motor support, of the interior of the threaded rod, and a positioning rod is slidably connected to the interior of the blind hole; a compression spring is arranged between the positioning rod and the blind hole, one end of the compression spring is fixedly connected with the positioning rod, and the other end of the compression spring is fixedly connected with the threaded rod; the device has the advantages that after the nut and the threaded rod are screwed, the rotating plate in the groove in the nut is rotated to be perpendicular to the nut, the rotating plate extrudes the positioning rod on the threaded rod, and when the rotating plate is completely perpendicular to the nut, the elastic force of the compression spring drives the positioning rod to be clamped with the positioning hole in the inner side of the rotating plate; similarly, the nut is tensioned through the cooperation of the elastic force of the compression spring and the rotating plate, and the anti-loosening purpose is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of elevator safety protection devices, in particular to an elevator car safety clamp protection device. Background Art

[0002] The safety clamp is an indispensable safety protection device for elevators. It is triggered by the speed limiter and driven by the connecting rod to provide necessary protection for the safe operation of the elevator. The speed limiter mentioned above includes a speed limiter, a steel rope, a tensioner and a connecting rod. At present, the physical quantity of speed measured by the speed limiter is indirectly responded to by centrifugal force. A physical threshold of overspeed is set. When the speed of the car exceeds the physical threshold, the speed limiter uses a weight or a pendulum to produce displacement under the action of centrifugal force, thereby triggering the action mechanism to stop the speed limiter wheel from rotating, thereby locking the speed limiter steel rope, and transmitting this action force to the safety clamp pull rod through the connecting rod, so that the safety clamp is actuated, clamping the guide rail and stopping the elevator. If any of the above-mentioned components fails, the protection of the safety clamp will fail. The safety clamp is usually installed at the bottom of both sides of the car frame. At the bottom layer, a large space needs to be reserved, so the pit excavation space is large and a higher installation cost is required.

[0003] The Chinese patent discloses "an electric safety clamp protection device for a home elevator car" with patent number CN202020644578.1. The scheme records "an electric safety clamp protection device for a home elevator car, belonging to the technical field of elevator safety protection devices. It includes a safety clamp and an acceleration sensor for measuring the acceleration of the car. The safety clamp is arranged in the middle of the car frame, including a wedge, a brake wheel, a connecting rod, a linear push rod motor and a motor bracket. The wedge is provided with a groove for the guide rail to pass through along the height direction. The longitudinal section of the groove is a right-angled trapezoid with a narrow upper part and a wide lower part. The brake wheel is arranged in the groove, and the rolling surface is against the groove. On the inclined side wall, one end of the connecting rod is connected to the brake wheel, and the other end is connected to the linear push rod motor. The push rod of the linear push rod motor is hinged to one end of the motor bracket, and the other end of the motor bracket is fixedly installed on the side wall of the car frame. Advantages: The speed accuracy of the measurement is much higher than that of the speed limiter and the safety protection action is reliable; the space for pit excavation is reduced, which is conducive to the low pit or pitless installation of the elevator. The case has a beneficial effect, but there are still certain problems. The device only connects and fixes the motor bracket and the car frame through ordinary threaded rods and nuts. There is no anti-loosening mechanism. The nut is easy to fall off after long-term use, resulting in ineffective fixation of the motor bracket, which poses a hidden danger. Utility Model Content

[0004] The purpose of the utility model is to provide an elevator car safety clamp protection device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An elevator car safety clamp protection device comprises a car frame and a motor bracket, wherein the motor bracket is fixedly installed on the side wall of the car frame, a threaded rod is fixedly connected to one end of the motor bracket on the outside close to the car frame, a blind hole is provided on the end of the threaded rod away from the motor bracket, a positioning rod is slidably connected to the inside of the blind hole, a compression spring is provided between the positioning rod and the blind hole, one end of the compression spring is fixedly connected to the positioning rod, and the other end of the compression spring is fixedly connected to the threaded rod, a nut is sleeved on the outside of the threaded rod, the nut is threadedly connected to the threaded rod, a groove is provided on the side of the nut away from the motor bracket, a rotating plate is rotatably connected to the inside of the groove, a positioning hole is provided on the inner side of the rotating plate, and the positioning hole is used in conjunction with the positioning rod.

[0007] Preferably, the outer side wall of the positioning rod is in contact with the inner side wall of the blind hole.

[0008] Preferably, the width of the groove is greater than the width of the rotating plate.

[0009] Preferably, the height of the groove is equal to the height of the rotating plate.

[0010] Preferably, the rotating plate is a half regular hexagonal structure.

[0011] The beneficial effects achieved by the utility model are as follows: through the arrangement of the car frame, motor bracket, threaded rod, blind hole, positioning rod, compression spring, nut, groove, rotating plate, and positioning hole, after the nut and the threaded rod are screwed, the rotating plate in the groove on the nut is rotated until it is perpendicular to the nut, and the rotating plate is displayed to squeeze the positioning rod on the threaded rod. When the rotating plate and the nut are completely perpendicular, the elastic force of the compression spring drives the positioning rod to engage with the positioning hole on the inner side of the rotating plate. Similarly, the elastic force of the compression spring cooperates with the rotating plate to tighten the nut, thereby achieving the purpose of preventing it from loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a structural schematic diagram of the rotating plate of the utility model;

[0014] Figure 2 It is a structural schematic diagram of a nut of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the positioning hole of the utility model;

[0016] Figure 4 It is a cross-sectional schematic diagram of the threaded rod of the utility model;

[0017] Figure 5 It is a structural schematic diagram of a car frame of the utility model.

[0018] In the figure: 1, car frame; 2, motor bracket; 3, threaded rod; 4, blind hole; 5, positioning rod; 6, compression spring; 7, nut; 8, groove; 9, rotating plate; 10, positioning hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figures 1 to 5 , the utility model provides a technical solution:

[0021] The elevator car safety clamp protection device comprises a car frame 1 and a motor bracket 2, the motor bracket 2 is fixedly installed on the side wall of the car frame 1, a threaded rod 3 is fixedly connected to one end of the motor bracket 2 close to the car frame 1, a blind hole 4 is provided at one end of the threaded rod 3 away from the motor bracket 2, a positioning rod 5 is slidably connected inside the blind hole 4, a compression spring 6 is arranged between the positioning rod 5 and the blind hole 4, one end of the compression spring 6 is fixedly connected to the positioning rod 5, and the other end of the compression spring 6 is fixedly connected to the threaded rod 3, a nut 7 is sleeved on the outside of the threaded rod 3, the nut 7 is threadedly connected to the threaded rod 3, a groove 8 is provided on the side of the nut 7 away from the motor bracket 2, a rotating plate 9 is rotatably connected inside the groove 8, a positioning hole 10 is provided on the inner side of the rotating plate 9, the positioning hole 10 is used in conjunction with the positioning rod 5, the rotating plate 9 is rotated until the positioning rod 5 is engaged with the positioning hole 10, the nut 7 is limited to prevent it from loosening.

[0022] The outer wall of the positioning rod 5 fits with the inner wall of the blind hole 4 to ensure the stability of the positioning rod 5 when sliding; the width of the groove 8 is greater than the width of the rotating plate 9 to ensure that the rotating plate 9 can rotate; the height of the groove 8 is equal to the height of the rotating plate 9, and the rotating plate 9 is a half regular hexagonal structure. When the rotating plate 9 rotates into the groove 8, the rotating plate 9 with a half regular hexagonal structure is combined with the nut 7 with a regular hexagonal structure, which is convenient for screwing it.

[0023] Specifically, when using the utility model, the nut 7 is first screwed onto the threaded rod 3 until the nut 7 is tightly pressed against the car frame 1. At this time, the rotating plate 9 is rotated outward until the rotating plate 9 is perpendicular to the nut 7. Under the elastic force of the compression spring 6, the positioning rod 5 in the blind hole 4 on the threaded rod 3 is engaged with the positioning hole 10 on the inner side of the rotating plate 9. At this time, the rotating plate 9 compresses the compression spring 6 through the positioning rod 5, and the compression spring 6 generates an elastic force to press the rotating plate 9 and the nut 7 through the positioning rod 5, thereby achieving the purpose of preventing loosening.

[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0026] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator car safety clamp protection device, comprising a car frame (1) and a motor bracket (2), wherein the motor bracket (2) is fixedly mounted on a side wall of the car frame (1), and a threaded rod (3) is fixedly connected to one end of the motor bracket (2) near the car frame (1), and characterized in that: A blind hole (4) is provided at one end of the threaded rod (3) away from the motor bracket (2), a positioning rod (5) is slidably connected inside the blind hole (4), a compression spring (6) is provided between the positioning rod (5) and the blind hole (4), one end of the compression spring (6) is fixedly connected to the positioning rod (5), and the other end of the compression spring (6) is fixedly connected to the threaded rod (3), a nut (7) is sleeved on the outside of the threaded rod (3), the nut (7) is threadedly connected to the threaded rod (3), a groove (8) is provided on the outside of the nut (7) away from the motor bracket (2), a rotating plate (9) is rotatably connected inside the groove (8), a positioning hole (10) is provided on the inner side of the rotating plate (9), and the positioning hole (10) is used in conjunction with the positioning rod (5).

2. The elevator car safety clamp protection device according to claim 1, characterized in that: The outer side wall of the positioning rod (5) is in contact with the inner side wall of the blind hole (4).

3. The elevator car safety clamp protection device according to claim 1, characterized in that: The width of the groove (8) is greater than the width of the rotating plate (9).

4. The elevator car safety clamp protection device according to claim 1, characterized in that: The height of the groove (8) is equal to the height of the rotating plate (9).

5. The elevator car safety clamp protection device according to claim 1, characterized in that: The rotating plate (9) is a half regular hexagonal structure.

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