Anti-falling device used after failure of vertically-arranged lead screw nut transmission assembly

Abstract

An anti-falling device used after failure of a vertically-arranged lead screw nut transmission assembly comprises an anti-falling nut, a shifting column installation base, a shifting column, a detection switch and an alarm system. The anti-falling nut is assembled with a lead screw in the lead screw nut transmission assembly, and a shifting column installation base is assembled on the outer side wall of the anti-falling nut and located below a nut in the lead screw nut transmission assembly. A dial column and a detection switch are assembled on the upper end surface of the dial column mounting seat; the shifting column is vertically arranged, the lower end of the shifting column is fixedly connected with the shifting column mounting base, a shifting column penetrating hole is formed in the bottom of the load mounting base fixedly connected with the lead screw nut transmission assembly, and the upper end of the shifting column enters the shifting column penetrating hole; the output end of the detection switch is in communication connection with the alarm system. Through the cooperation of the anti-falling nut, the shifting column and the detection switch, the anti-falling function after the vertically-arranged lead screw nut transmission assembly fails is achieved, and the purposes of eliminating safety production hidden dangers and guaranteeing the personal safety of operators are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a falling prevention device for a vertically arranged lead screw nut transmission assembly after failure. Background Art

[0002] The screw-nut transmission assembly, also known as the spiral transmission assembly, is used to complete the conversion between rotational motion and linear motion. When the screw rotates one circle, the nut moves one pitch. In mechatronic equipment, the screw-nut transmission assembly can be used to convert the motor's rotational power into the linear movement driving force of the driven component.

[0003] As attached Figure 1 , Figure 2 A vertically arranged screw-nut transmission assembly is shown, in which a screw 1 and a nut 2 cooperate to form a spiral transmission pair, and a load mounting seat 3 is connected to the nut 2 through a fixing screw 4. After the spiral transmission pair of the screw-nut transmission assembly fails, the load falls rapidly under the action of its own gravity, which not only causes damage to the production equipment, but also leads to production safety accidents, posing a hidden danger to the operator's personal safety. In order to solve the above problems, it is necessary to innovatively design a fall prevention device for the failure of the vertically arranged screw-nut transmission assembly. Utility Model Content

[0004] The utility model provides a device for preventing a vertically arranged lead screw and nut transmission assembly from falling after failure, and aims to achieve the function of preventing a vertically arranged lead screw and nut transmission assembly from falling after failure through the cooperation of an anti-fall nut, a shifting column and a detection switch, so as to eliminate hidden safety hazards in production and ensure the personal safety of operators.

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

[0006] A device for preventing falling after failure of a vertically arranged lead screw and nut transmission assembly comprises an anti-fall nut, a shifting post mounting seat, a shifting post, a detection switch and an alarm system; the anti-fall nut is matched with the lead screw in the lead screw and nut transmission assembly and is located below the nut in the lead screw and nut transmission assembly, and the shifting post mounting seat is equipped on the outer side wall of the anti-fall nut; the shifting post and the detection switch are assembled on the upper end face of the shifting post mounting seat; the shifting post is vertically arranged, and its lower end is fixedly connected to the shifting post mounting seat, and a shifting post insertion hole is provided at the bottom of a load mounting seat fixedly connected to the lead screw and nut transmission assembly, and the upper end of the shifting post enters into the shifting post insertion hole; the output end of the detection switch is communicatively connected to the alarm system.

[0007] The above-mentioned device for preventing falling after failure of the vertically arranged lead screw and nut transmission assembly, the top of the shifting post is a spherical curved surface.

[0008] The above-mentioned vertically arranged anti-falling device after failure of the screw nut transmission assembly, the distance between the upper end surface of the anti-falling nut and the bottom surface of the fixing screw arranged in the screw nut transmission assembly is h1, and the distance between the bottom surface of the load mounting seat fixedly connected to the screw nut transmission assembly and the upper end surface of the detection switch is h2, and the difference between the two is not less than 1mm, that is, h2-h1≥1mm.

[0009] In the above-mentioned anti-falling device after failure of the vertically arranged screw nut transmission assembly, h2-h1 is the middle value of the detection range of the detection switch.

[0010] The above-mentioned anti-falling device after the vertically arranged screw nut transmission assembly fails, the outer wall of the anti-falling nut is formed by removing material to form a mounting surface that cooperates with the shift column mounting seat, and a group of threaded holes are arranged on the mounting surface.

[0011] The above-mentioned anti-falling device after failure of the vertically arranged screw nut transmission assembly is provided with a long hole assembled with the anti-falling nut on the column mounting seat, and the long hole is a long hole along the vertical direction.

[0012] The utility model provides a device for preventing a vertically arranged screw nut transmission assembly from falling after failure. The device connects a load mounting seat fixedly connected to a nut in the screw nut transmission assembly through a lever. When the screw rotates in the screw nut transmission assembly, the nut in the screw nut transmission assembly and the anti-fall nut move upward or downward at the same time. In this process, the anti-fall nut does not bear the load. When the spiral transmission pair in the screw nut transmission assembly fails, the nut and the load in the screw nut transmission assembly fall quickly and press on the anti-fall nut, thereby preventing the nut and the load in the screw nut transmission assembly from falling. At the same time, the detection switch transmits the collected load falling information to the alarm system, and the alarm system issues a warning. It can be seen that the utility model realizes the function of preventing a vertically arranged screw nut transmission assembly from falling after failure through the cooperation of the anti-fall nut, the lever and the detection switch, and achieves the purpose of eliminating safety hazards in production and ensuring the personal safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of a vertically arranged lead screw and nut transmission assembly;

[0014] Figure 2 yes Figure 1 Exploded structure diagram;

[0015] Figure 3 It is a schematic diagram of the structure of the utility model;

[0016] Figure 4 Is Figure 3 A schematic diagram of the structure of the utility model observed from the rear side;

[0017] Figure 5It is a schematic diagram of the structure of the utility model cooperating with a vertically arranged lead screw nut transmission assembly;

[0018] Figure 6 yes Figure 5 K-direction view;

[0019] Figure 7 yes Figure 6 The enlarged view of the structure at position Ⅰ in the middle;

[0020] Figure 8 yes Figure 6 Schematic diagram of the AA section structure;

[0021] Fig. 9 It is a schematic diagram of the structure of the lever column.

[0022] Explanation of the symbols in the figure:

[0023] 1 is a lead screw; 2 is a nut; 3 is a load mounting seat, 3-1 is a lever insertion hole; 4 is a fixing screw; 5 is an anti-fall device, 5-1 is an anti-fall nut, 5-2 is a lever mounting seat, 5-2-1 is a long hole, 5-3 is a detection switch, 5-4 is a lever, and 5-4-1 is a spherical surface. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] See Figure 1. Figure 2 A vertically arranged screw-nut transmission assembly is provided, wherein a screw 1 and a nut 2 cooperate to form a spiral transmission pair, and a load mounting seat 3 is connected to the nut 2 through a fixing screw 4. When the spiral transmission pair of the screw-nut transmission assembly fails, the load falls rapidly under the action of its own gravity, which not only damages the production equipment, but also causes production safety accidents, posing a hidden danger to the operator's personal safety.

[0026] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8In order to solve the problem of load falling after the spiral transmission pair in the vertically arranged lead screw and nut transmission assembly fails, the utility model provides an anti-falling device 5 after the vertically arranged lead screw and nut transmission assembly fails, the anti-falling device 5 comprises an anti-falling nut 5-1, a shifting post mounting seat 5-2, a shifting post 5-4, a detection switch 5-3 and an alarm system; the anti-falling nut 5-1 is matched with the lead screw 1 in the lead screw and nut transmission assembly, and is located below the nut 2 in the lead screw and nut transmission assembly, and a mounting surface that cooperates with the shifting post mounting seat is formed on the outer side wall of the anti-falling nut 5-1 by removing material, and a group of threaded holes are arranged on the mounting surface, and the shifting post mounting seat is mounted on the mounting surface of the anti-falling nut 5-1 by screws. Seat 5-2; the upper end surface of the shifting post mounting seat 5-2 is equipped with a shifting post 5-4 and a detection switch 5-3; the shifting post 5-4 is arranged vertically, and the lower end thereof is fixedly connected to the shifting post mounting seat 5-2, correspondingly, a shifting post insertion hole 3-1 is opened at the bottom of the load mounting seat 3 fixedly connected to the lead screw and nut transmission assembly, and the upper end of the shifting post 5-4 enters the shifting post insertion hole 3-1, and when the lead screw 1 in the lead screw and nut transmission assembly rotates, the anti-fall nut 5-1 is connected to the load mounting seat 3 through the shifting post 5-4 and the shifting post mounting seat 5-2, the lead screw 1 rotates one circle, and the nut 2 and the anti-fall nut 5-1 move downward or upward by one pitch; the output end of the detection switch 5-3 is connected to the alarm system for communication.

[0027] See also Figure 6 , Figure 7 , the utility model describes a device for preventing a vertically arranged lead screw and nut transmission assembly from falling after failure, the distance between the upper end surface of the anti-fall nut 5-1 and the bottom surface of the fixing screw 4 provided in the lead screw and nut transmission assembly is h1, the distance between the bottom surface of the load mounting seat 3 to which the lead screw and nut transmission assembly is fixedly connected and the upper end surface of the detection switch 5-3 is h2, and the difference between the two is not less than 1mm, that is, h2-h1≥1mm; h2-h1 is the middle value of the detection range of the detection switch 5-3. The utility model also provides a long hole 5-2-1 on the column mounting seat 5-2 to be assembled with the anti-fall nut 5-1, the long hole 5-2-1 is a long hole along the vertical direction, and the upper and lower positions of the column mounting seat 5-2 can be adjusted through the long hole 5-2-1 to ensure that the h2 value meets the above requirements.

[0028] See also Figure 8 , Fig. 9The utility model discloses a device for preventing falling after failure of a vertically arranged lead screw and nut transmission assembly, wherein the top of the shifting post 5-4 is a spherical curved surface 5-4-1. When the lead screw 1 in the lead screw and nut transmission assembly rotates, the spherical curved surface 5-4-1 on the top of the shifting post 5-4 fits with the inner wall of the shifting post insertion hole 3-1 of the load mounting seat 3, which not only prevents the anti-falling nut 5-1 from rotating with the lead screw 1 in the lead screw and nut transmission assembly, but also the spherical curved surface 5-4-1 moves up and down in the shifting post insertion hole 3-1 in the load mounting seat 3 more smoothly, which is beneficial to adjust the position of the shifting post mounting seat 5-2.

[0029] See also Figures 1 to 9 The utility model provides a device for preventing the vertically arranged screw-nut transmission assembly from falling after failure, and its working principle is as follows: a load mounting seat fixedly connected to a nut in the screw-nut transmission assembly is connected by a shifting column, and when the screw rotates in the screw-nut transmission assembly, the nut and the anti-fall nut in the screw-nut transmission assembly move upward or downward at the same time, and during this process the anti-fall nut does not bear the load, and when the spiral transmission pair in the screw-nut transmission assembly fails, the nut and the load in the screw-nut transmission assembly fall rapidly and press on the anti-fall nut, thereby preventing the nut and the load in the screw-nut transmission assembly from falling, and at the same time, the detection switch transmits the collected load falling information to the alarm system, and the alarm system issues a warning.

Claims

1. A device for preventing a vertically arranged lead screw and nut transmission assembly from falling after failure, characterized in that: The anti-fall device (5) comprises an anti-fall nut (5-1), a shifting post mounting seat (5-2), a shifting post (5-4), a detection switch (5-3) and an alarm system; the anti-fall nut (5-1) is mounted on a lead screw (1) in a lead screw nut transmission assembly and is located below a nut (2) in the lead screw nut transmission assembly; a shifting post mounting seat (5-2) is mounted on the outer side wall of the anti-fall nut (5-1); the shifting post (5-4) and the detection switch (5-3) are mounted on the upper end surface of the shifting post mounting seat (5-2); the shifting post (5-4) is arranged vertically, and its lower end is fixedly connected to the shifting post mounting seat (5-2); a shifting post insertion hole (3-1) is provided at the bottom of a load mounting seat (3) fixedly connected to the lead screw nut transmission assembly, and the upper end of the shifting post (5-4) enters the shifting post insertion hole (3-1); the output end of the detection switch (5-3) is communicatively connected to the alarm system.

2. The anti-falling device after failure of the vertically arranged lead screw and nut transmission assembly according to claim 1 is characterized in that: The top of the lever (5-4) is a spherical curved surface (5-4-1).

3. The anti-falling device after failure of the vertically arranged lead screw and nut transmission assembly according to claim 1 or 2, characterized in that: The distance between the upper end surface of the anti-fall nut (5-1) and the bottom surface of the fixing screw (4) provided in the screw nut transmission assembly is h1, and the distance between the bottom surface of the load mounting seat (3) fixedly connected to the screw nut transmission assembly and the upper end surface of the detection switch (5-3) is h2, and the difference between the two is not less than 1 mm, that is, h2-h1≥1 mm.

4. The anti-falling device after failure of the vertically arranged lead screw and nut transmission assembly according to claim 3 is characterized in that: h2-h1 is the middle value of the detection range of the detection switch (5-3).

5. The anti-falling device after failure of the vertically arranged lead screw and nut transmission assembly according to claim 4 is characterized in that: The outer side wall of the anti-fall nut (5-1) is formed into a mounting surface that matches with the lever column mounting seat by removing material, and a group of threaded holes are arranged on the mounting surface.

6. The anti-falling device after failure of the vertically arranged lead screw and nut transmission assembly according to claim 5 is characterized in that: A long hole (5-2-1) assembled with the anti-fall nut (5-1) is provided on the column mounting seat (5-2), and the long hole (5-2-1) is a long hole along the vertical direction.

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