Corner limiting mechanism and azimuth turntable

Abstract

The corner limiting mechanism and azimuth turntable, one end of the screw rod is provided with an input gear for receiving rotating power, the rod body of the screw rod is slidably connected with one side of the block through a screw nut, and the other side of the block slides along the guide column through a through hole; the guide column is parallel to the screw rod; a plurality of limiting switches for sensing the position of the block are further included, the plurality of limiting switches are arranged along the extension direction of the guide column and are respectively in communication connection with the controller; the input gear rotates and then drives the block to move along the guide column through the screw nut mechanism, and the limiting switch sends a signal to the controller when the block is sensed. The scheme converts the circumferential rotating motion of the input gear into the linear motion of the block, adjusts and limits the stroke of the linear motion by setting the position of the limiting switch, and then accurately controls the rotation angle range of the input gear, which is accurate in transmission and high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of mechanical limiting devices, specifically a corner limiting mechanism and an orientation turntable. Background Technology

[0002] Orientation turntables are key components in the fields of testing and automation, and their rotation stroke often needs to be limited to a specific angular range.

[0003] In existing technologies, turntable limiting methods are mainly divided into two categories: mechanical limiting and electrical soft limiting. Mechanical limiting typically involves setting fixed blocks or limit switches along the path of the rotating disk. While this type of solution is simple in structure and low in cost, its limiting angle is usually fixed and difficult to adjust once set, lacking flexibility. This type of structure is particularly unsuitable for applications requiring large turning angles or non-standard angle limiting.

[0004] Electrical soft limit switches, on the other hand, use programmed angle thresholds and rely on position signals from sensors such as encoders to achieve the limit. While this approach is easy to adjust, it depends on the stability of the control system and the accuracy of the sensors, and carries certain risks in purely mechanically driven applications or those requiring high reliability.

[0005] Therefore, whether it's a simple mechanical stop or a limit switch mounted on a turntable, the settable limit range is usually limited by the physical structure of the turntable, making it difficult to achieve high flexibility and adjustable limits exceeding 360°. There is a need in the art for a turntable limit device that combines the reliability of mechanical limits with a wide range of flexible adjustments. Summary of the Invention

[0006] This utility model aims to solve existing problems by providing a corner limiting mechanism and an orientation turntable. To achieve the above objective, the technical solution adopted by this utility model provides a corner limiting mechanism, including a lead screw. One end of the lead screw is provided with an input gear for receiving rotational power. The body of the lead screw is slidably connected to one side of a stop block via a lead screw nut. The other side of the stop block slides along a guide post through a through hole; the guide post is parallel to the lead screw.

[0007] It also includes several limit switches for sensing the position of the stop block. These limit switches are arranged along the extension direction of the guide post and are respectively connected to the controller in communication.

[0008] The input gear rotates, which in turn drives the stop block to move along the guide post through the screw-nut mechanism. When the limit switch senses the stop block, it sends a signal to the controller.

[0009] It also includes an upper positioning plate and a lower positioning plate, which are connected by several support columns to form a frame structure; the two ends of the lead screw are respectively connected to the upper positioning plate and the lower positioning plate through several bearings to form a circumferential rotational connection; the two ends of the guide column are respectively fixedly connected to the upper positioning plate and the lower positioning plate.

[0010] It also includes a guide sleeve, which is located on the upper end face of the upper positioning plate. The other end of the lead screw passes through the plate surface / opening of the upper positioning plate and the guide sleeve in sequence.

[0011] The other end of the lead screw is equipped with an accompanying gear, which is used to output the rotational motion at a fixed angle.

[0012] The through hole of the stop block is connected to the guide post through a sliding bushing.

[0013] The limit switch is fixed to the frame structure by a support frame; the support frame is provided with a guide groove parallel to the guide post, and the limit switch is movably connected to it by bolts inserted into the guide groove.

[0014] This utility model also provides an orientation turntable, including any of the aforementioned corner limiting mechanisms.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: by converting the circumferential rotational motion of the input gear into the linear motion of the stop block, and by adjusting and limiting the stroke of the linear motion by setting the position of the limit switch, the rotation angle range of the input gear can be precisely controlled. The transmission is accurate and reliable, and the technical effects of simple structure, convenient adjustment and large limit range are achieved. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0018] Referring to the attached diagram, 01-Upper positioning plate, 02-Lower positioning plate, 03-Support column, 04-Lead screw, 05-Input gear, 06-Accompanying gear, 07-Guide sleeve, 08-Lead screw nut, 09-Stop block, 10-Guide column, 11-Sliding bushing, 12-Left limit switch support frame, 13-Right limit switch support, 14-Upper limit switch, 15-Lower limit switch. Detailed Implementation

[0019] The present invention will now be further described with reference to the accompanying drawings. For ease of explanation, the direction of the positioning plate above is referred to as "up" and vice versa.

[0020] See Figure 1 and Figure 2 , Figure 1 and Figure 2 This illustration showcases an embodiment of the present invention: a directional turntable with a corner limiting mechanism. The turntable includes a frame structure comprising an upper positioning plate, a lower positioning plate, and four support columns fixedly connected between them. The upper and lower positioning plates are arranged in parallel and maintain a stable relative position through the connection of the support columns.

[0021] The frame structure also includes a lead screw installed between the upper and lower positioning plates. The lead screw is perpendicular to the surfaces of the upper and lower positioning plates. The upper and lower ends of the lead screw are connected to the openings of the upper and lower positioning plates through several bearings to form a circumferential rotational connection around the lead screw axis.

[0022] See Figure 2 The lower end of the lead screw extends from the lower end face of the lower positioning plate and is fixedly mounted with an input gear perpendicular to the lead screw axis. The input gear meshes with the output gear of the external drive device to receive rotational power / angle. The upper end of the lead screw extends from the upper end face of the upper positioning plate and is fixedly mounted with an accompanying gear perpendicular to the lead screw axis. The accompanying gear serves as the output end of the rotational motion of the entire orientation turntable and is used to drive the equipment under test.

[0023] Preferably, a guide sleeve is also included. The upper and lower ends of the guide sleeve are through-holes. The lower end of the guide sleeve is fixed to the opening in the upper positioning plate. The upper end of the lead screw passes sequentially through the opening in the upper positioning plate and the upper end of the guide sleeve, extending upwards. The guide sleeve provides effective radial support for the lead screw, ensuring coaxiality and smoothness during rotation. See also Figure 2 The screw rod has a screw nut at its middle section that forms a helical / sliding pair with an opening on one side of the stop block, and the screw nut and the opening of the stop block are connected by screws. It also includes a guide post, whose upper and lower ends are fixedly installed between upper and lower positioning plates, respectively. The guide post is parallel to the screw rod and located on its side. The other side of the stop block has a through hole, in which a sliding bushing is installed. The sliding bushing fits into the guide post and forms a sliding engagement, used to restrict the circumferential rotation of the stop block and screw rod nut assembly. When the screw rod rotates, due to the obstruction of the guide post, the stop block can only reciprocate linearly along the axial direction of the screw rod / guide post.

[0024] See Figure 1 It also includes several limit switches for sensing the position of the stop blocks. These limit switches are arranged along the extension direction of the guide posts and are each communicatively connected to the controller. Specifically, the left limit switch support frame and the right limit switch support frame are arranged opposite each other on both sides of the frame structure, and their upper ends are fixedly connected between the upper and lower positioning plates by bolts. The upper limit switch is installed on the left limit switch support frame, and the lower limit switch is installed on the right limit switch support frame.

[0025] Preferably, the left and right limit switch support frames are provided with vertically oriented strip guide grooves. The upper limit switch and the lower limit switch are fixed by bolts passing through the strip guide grooves, so that their positions can be adjusted up and down independently. After adjustment, the bolts are tightened to lock them in place.

[0026] In operation, the external drive unit drives the lead screw to rotate via the input gear. The rotational motion of the lead screw is output through the accompanying gear at the top, providing working rotation for the azimuth turntable. Simultaneously, the rotation of the lead screw is converted into the linear lifting and lowering motion of the stop block via the lead screw nut. There is a linear relationship between the linear displacement of the stop block and the rotation angle of the lead screw, which is determined by the lead screw lead and the transmission ratio between the accompanying gear and the input gear. By calculating the desired turntable rotation angle using conventional formulas, the corresponding linear travel limit of the stop block can be calculated. By loosening the fixing bolts and adjusting the height positions of the upper and lower limit switches on their respective support frames, the upper and lower limit points of the linear motion of the stop block 09 can be set.

[0027] When the turntable rotates and moves the stop block to contact the upper or lower limit switch, the corresponding limit switch will immediately send an electrical signal. This signal is transmitted to the controller, which will cut off the drive power or command the drive motor to reverse, thereby stopping the azimuth turntable's rotation in the current direction and achieving angle limiting. Since the position of the limit switches is infinitely adjustable, this embodiment can achieve a wide range and highly flexible angle limiting function.

[0028] This embodiment allows setting the limit angle of the turntable by simply adjusting the installation positions of the two limit switches. The limit range is theoretically limited only by the length of the lead screw and the structural strength, and can easily achieve large-angle limits far exceeding 360°.

[0029] In this embodiment, the limiting angle is determined by the lead screw pitch and the gear ratio, both of which are mechanically fixed parameters, allowing for precise transmission and avoiding the drift or misjudgment problems that may occur with purely electrical soft limiting, thus ensuring high reliability. This embodiment cleverly transforms the complex problem of limiting rotational angles into an intuitive linear stroke control problem. While achieving high performance, it avoids the use of expensive or complex sensors and control algorithms, making costs easy to control.

[0030] The embodiments of this utility model have been described above with reference to the accompanying drawings and examples. The structures given in the embodiments do not constitute a limitation on this utility model. Those skilled in the art can make adjustments as needed, and various modifications or variations within the scope of the appended claims are all within the scope of protection.

Claims

1. A corner limiting mechanism, characterized in that: It includes a lead screw, one end of which is provided with an input gear for receiving rotational power. The body of the lead screw is slidably connected to one side of a stop block, and the other side of the stop block slides along a guide post through a through hole. It also includes several limit switches for sensing the position of the stop block. These limit switches are arranged along the extension direction of the guide post and are respectively connected to the controller in communication. The input gear rotates, causing the stop block to move along the guide post. When the limit switch senses the stop block, it sends a signal to the controller.

2. The corner limiting mechanism according to claim 1, characterized in that: It also includes an upper positioning plate and a lower positioning plate, which are connected by several support columns to form a frame structure; the two ends of the lead screw are respectively connected to the upper positioning plate and the lower positioning plate in a circumferential rotational connection; the two ends of the guide column are respectively fixedly connected to the upper positioning plate and the lower positioning plate.

3. The corner limiting mechanism according to claim 1, characterized in that: It also includes a guide sleeve, which is located on the upper end face of the upper positioning plate. The other end of the lead screw passes through the plate surface / opening of the upper positioning plate and the guide sleeve in sequence.

4. The corner limiting mechanism according to claim 1 or 3, characterized in that: The other end of the lead screw is equipped with an accompanying gear.

5. The corner limiting mechanism according to claim 1, characterized in that: The through hole of the stop block is connected to the guide post through a sliding bushing.

6. The corner limiting mechanism according to claim 1, characterized in that: The limit switch is fixed to the frame structure by a support frame; the support frame is provided with a guide groove parallel to the guide post, and the limit switch is movably connected to it by bolts inserted into the guide groove.

7. An azimuth turntable, characterized in that: Includes the corner limiting mechanism as described in any one of claims 1-6.

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