Limiting structure, rotary table with limiting structure and rotary transmission structure

Abstract

The utility model relates to a limit structure, a rotary table with the limit structure and a rotary transmission structure, the limit structure is arranged on the rotary transmission mechanism, the rotary transmission mechanism comprises a rotary table and a fixed table, and the limit structure comprises an upper collision block arranged on the rotary table, a lower collision block arranged on the fixed table and a lower collision block arranged on the fixed table, and a lower collision block which is matched with the upper collision block and is used for limiting the rotation of the rotary table is arranged on the fixed table. The upper collision block and the lower collision block are arranged, the structural form is simple, fixing is convenient, and the space structure is small; a micro-motion plectrum mechanical switch is arranged on the basis of a mechanical limit switch, the influence of the environment is small, and the reliability is higher; and a double-layer protection design of triggering electrical limiting first and then mechanical hard limiting is designed, so that the safety of equipment and operators in an abnormal rotation process is effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of communication antenna technology, specifically to the field of limit turntable control for communication antennas, and particularly to a limit structure and a turntable and rotary transmission structure having the limit structure. Background Technology

[0002] The existing batch of small turntables or rotary transmission mechanisms mainly consist of worm gears, planetary reducers and servo motors. They are not equipped with dedicated limit mechanisms. In actual use, they also need to be equipped with dedicated electrical switch limiters and mechanical hard limiters to ensure that their rotation is limited to a specific angular range. Utility Model Content

[0003] In view of this, the present invention proposes a limiting structure and a turntable and rotary transmission structure having the limiting structure, aiming to solve the problems of small space and lack of limiting in existing small turntables or rotary transmission mechanisms.

[0004] Specifically, this utility model provides a limiting structure, which is disposed on a rotary transmission mechanism. The rotary transmission mechanism includes a rotary table and a fixed table, and the limiting structure includes:

[0005] An upper impact block is provided on the rotating platform;

[0006] A lower impact block, which works in conjunction with the upper impact block, is installed on the fixed platform to limit the rotation of the rotary table.

[0007] Based on the above scheme, it also includes: a micro-motion paddle mechanical switch for electrically limiting the rotation of the rotary table is provided on the upper impact block;

[0008] The micro-motion paddle mechanical switch includes a positive micro-motion paddle mechanical switch and a negative micro-motion paddle mechanical switch symmetrically arranged on the upper impact block with the central axis of the upper impact block as the axis of symmetry.

[0009] Based on the above scheme, both the positive micro-motion paddle mechanical switch and the negative micro-motion paddle mechanical switch are provided with rollers at the bottom for colliding with the lower impact block.

[0010] Based on the above scheme, the upper impact block is provided with two mounting slots for installing a positive micro-motion paddle mechanical switch and a negative micro-motion paddle mechanical switch.

[0011] Based on the above scheme, the lower impact block includes a square base, a first column member disposed opposite to the square base for colliding with the rollers on the positive micro-motion paddle mechanical switch, and a second column member for colliding with the rollers on the negative micro-motion paddle mechanical switch.

[0012] Based on the above scheme, in the zero position state, the initial installation positions of the upper and lower impact blocks differ by 180°.

[0013] Based on the above scheme, the roller is exposed at the bottom of the upper impact block.

[0014] In addition, this utility model also provides a turntable, including a rotating platform and a fixed platform, and also includes the aforementioned limiting structure.

[0015] In addition, this utility model also provides a rotary transmission structure, including a rotary table and a fixed table, and also includes the aforementioned limiting structure.

[0016] In addition, this utility model also provides a two-dimensional tracking turntable, including a fixed plate and a turntable, and also includes the aforementioned limiting structure.

[0017] This utility model features an upper and lower impact block, resulting in a simple structure, convenient fixing, and compact space. It incorporates a micro-motion mechanical switch based on a mechanical limit switch, making it less susceptible to environmental influences and more reliable. A double-layer protection design, with electrical limit activation followed by mechanical hard limit activation, effectively protects the equipment and operators during abnormal rotation. It enables the creation of a ±170° rotary table with both switch and mechanical limit switches by simply modifying most existing small rotary tables or rotary transmission mechanisms. The limit mechanism is easily installed and fixed onto existing small rotary tables or rotary transmission mechanisms, ensuring rotation is limited to a specific angular range, thus protecting the main device from damage during rotation and ensuring operator safety. The design is simple, manufacturing is easy, requires fewer parts, and is convenient to operate. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0019] Figure 1 This is a schematic diagram of the limiting structure in this utility model (showing the rotating platform and the fixed platform);

[0020] Figure 2 This is a schematic diagram of the limiting structure in this utility model (rotary table not shown);

[0021] Figure 3 This is a schematic diagram of the upper impact block in this utility model (showing the roller);

[0022] Figure 4This is a structural schematic diagram of the collision state between the upper and lower impact blocks in this utility model (showing the collision state when the upper impact block moves clockwise);

[0023] Figure 5 This is a structural schematic diagram of the collision state between the upper and lower impact blocks in this utility model (showing the collision state when the upper impact block moves counterclockwise);

[0024] Figure 6 This is a schematic diagram of the upper impact block in this utility model;

[0025] Figure 7 This is a schematic diagram of the lower impact block in this utility model. Detailed Implementation

[0026] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1-2 As shown, this application provides a specific embodiment of a limiting structure with a rotation angle of ±170°. The limiting structure is disposed on a rotary transmission mechanism, which includes a rotary table 1 and a fixed table 2. The limiting structure includes an upper impact block 3 disposed on the rotary table 1 and a lower impact block 4 disposed on the fixed table 2, which cooperates with the upper impact block 3 to limit the rotation of the rotary table 1. The upper impact block 3 and the lower impact block 4 cooperate to limit the rotation of the rotary table 1.

[0029] As a specific implementation, the initial installation positions of the upper impact block 3 and the lower impact block 4 differ by 170°; wherein, the lower impact block 4 is installed on a relatively stationary fixed platform 2, and collides with the upper impact block 3 during rotational movement.

[0030] like Figure 3As shown, in order to electrically limit the rotation of the rotary table 1 before mechanical limiting, and to automatically cut off the power when the electrical limit is touched, the system further includes a micro-motion mechanical switch 5 on the upper impact block 3 for electrically limiting the rotation of the rotary table 1. Specifically, the micro-motion mechanical switch 5 includes a positive micro-motion mechanical switch 5-1 and a negative micro-motion mechanical switch 5-2 symmetrically arranged on the upper impact block 3 with the central axis of the upper impact block 3 as the axis of symmetry. Both the positive micro-motion mechanical switch 5-1 and the negative micro-motion mechanical switch 5-2 are provided with rollers 6 for colliding with the lower impact block 4.

[0031] In use, when the upper impact block 3 and the micro-motion paddle mechanical switch 5 rotate clockwise by more than 170° together, they collide with the inner protrusion of the lower impact block 4; when the upper impact block 3 and the micro-motion paddle mechanical switch 5 rotate counterclockwise by more than 170° together, they collide with the outer protrusion of the lower impact block 4. Figure 4 As shown, when the upper impact block 3 and the two micro-motion paddle mechanical switches 5 move clockwise to 170°, the outer ring protrusion of the lower impact block 4 first collides with the roller of the forward micro-motion paddle mechanical switch 5-1, triggering the switch to achieve power-off protection; when the micro-motion paddle mechanical switch 5 fails, the impact block 3 collides with the inner ring protrusion of the lower impact block 4 at the 176° position, achieving mechanical hard limit protection. Figure 5 As shown, when the upper impact block 3 and the two micro-motion paddle mechanical switches 5 move counterclockwise to 170°, the inner ring protrusion of the lower impact block 4 first collides with the roller of the negative micro-motion paddle mechanical switch 5-2, triggering the micro-motion paddle mechanical switch 5 to achieve power-off protection; when the switch fails, the impact block 3 collides with the outer ring protrusion of the lower impact block 4 at the 176° position to achieve mechanical hard limit protection.

[0032] The mechanical limit switch and the electrical limit switch are installed together. When the rotary table 1 rotates to the ±170° position, it first touches the electrical limit switch, causing the rotary table 1 to automatically cut off the power for protection. When the electrical limit switch fails, it then touches the mechanical limit switch to achieve limit protection. The preset electrical limit threshold is 172°.

[0033] In the zero position, the initial installation positions of the upper impact block 3 and the lower impact block 4 are 180° apart, so that the clockwise rotation to the positive micro-motion mechanical switch 5-1 position is greater than 170°, and the counterclockwise rotation to the negative micro-motion mechanical switch 5-2 position is greater than 170°.

[0034] Specifically, such as Figure 6 As shown, the upper impact block 3 is provided with mounting slots 3-1 for mounting two micro-motion mechanical switches 5. The rollers 6 of the micro-motion mechanical switches 5 are exposed outside the upper impact block 3, and the rollers 6 are used to collide with the lower impact block 4 to form a mechanical limit. Figure 7As shown, the lower impact block 4 includes a square base 4-1, a first pillar 4-2 disposed opposite to the square base 4-1 for colliding with the roller 6 on the positive micro-motion paddle mechanical switch 5-1, and a second pillar 4-3 for colliding with the roller 6 on the negative micro-motion paddle mechanical switch 5-2; wherein, in order to meet the position of collision with the upper impact block 3, the shape of the square base 4-1 is adapted to the shape of the bottom surface of the upper impact block 3.

[0035] When using it, the steps are as follows:

[0036] (1) Collect the photoelectric encoder signal set on the rotary table 1 to obtain the current rotation position angle information of the rotary table 1;

[0037] (2) By controlling the speed mode of the control protocol, the rotary table 1 is controlled to move in the set direction and speed;

[0038] (3) By controlling the position mode of the control protocol, the rotary table 1 is controlled to move to a predetermined position;

[0039] (4) If the rotating platform 1 is overrun, the software limit protection will be triggered first. If the software protection is abnormal, the micro-motion mechanical switch 5 will be triggered for limit protection. If both limit protections fail, the upper collision block 3 and the lower collision block 4 will be triggered for mechanical limit protection.

[0040] Example 2

[0041] Based on Embodiment 1, this utility model provides a turntable, including a rotating platform 1 and a fixed platform 2, and also includes a limiting structure with a rotation angle of ±170° as described in Embodiment 1 installed on the rotating platform 1.

[0042] Example 3

[0043] Based on Embodiment 1, this utility model provides a rotary transmission structure, including a rotary table 1 and a fixed table 2, and also includes a limiting structure with a rotation angle of ±170° as described in Embodiment 1 installed on the rotary transmission structure.

[0044] This utility model uses upper and lower impact blocks to simply install and fix the limiting mechanism on an existing small turntable or rotary transmission mechanism, so that its rotation is limited to a specific angle range, thereby protecting the main body of the device from damage during rotation and ensuring the safety of the operator.

[0045] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A limiting structure, which is arranged on a rotary transmission mechanism, the rotary transmission mechanism comprising a rotary table (1) and a fixed table (2), characterized in that, The limiting structure comprises: An upper impact block (3) arranged on the rotating table (1); A lower impact block (4) arranged on the fixed table (2) and cooperating with the upper impact block (3) to limit the rotation of the rotating table (1).

2. The limiting structure according to claim 1, characterized in that, Further comprising: A micro-switch mechanical switch (5) arranged on the upper impact block (3) to electrically limit the rotation of the rotating table (1); The micro-switch mechanical switch (5) comprises a positive micro-switch mechanical switch (5-1) and a negative micro-switch mechanical switch (5-2) symmetrically arranged on the upper impact block (3) with the central axis of the upper impact block (3) as the symmetric axis.

3. The limiting structure according to claim 2, wherein The bottom of the positive micro-switch mechanical switch (5-1) and the negative micro-switch mechanical switch (5-2) is provided with a roller (6) for colliding with the lower impact block (4).

4. The limiting structure according to claim 2, wherein The upper impact block (3) is provided with two installation grooves (3-1) for installing the positive micro-switch mechanical switch (5-1) and the negative micro-switch mechanical switch (5-2).

5. The limiting structure according to claim 2, wherein The lower impact block (4) comprises a square base (4-1), a first column member (4-2) and a second column member (4-3) oppositely arranged on the square base (4-1) for colliding with the roller (6) on the positive micro-switch mechanical switch (5-1) and the negative micro-switch mechanical switch (5-2), respectively.

6. The position-limiting structure according to claim 1, characterized in that, In the zero position state, the initial installation position of the upper impact block (3) and the lower impact block (4) is 180° apart.

7. The position-limiting structure according to claim 3, characterized in that, The roller (6) is exposed at the bottom of the upper impact block (3).

8. A turret comprising a rotating table (1) and a fixed table (2), characterized in that, Further comprising the limiting structure according to any one of claims 1-7.

9. A rotary drive structure comprising a rotating stage (1) and a fixed stage (2), characterized in that, Further comprising the limiting structure according to any one of claims 1-7.

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