Limiting structure

Abstract

The utility model provides a limiting structure which comprises a rotating body, a supporting frame, a first chain wheel, a second chain wheel, a detection frame, a chain, a positioning block and a first position sensor. According to the utility model, the two first chain wheels and the second chain wheel which are meshed with the chain are arranged, and the chain wheel between the two first chain wheels is in the same straight line, so that the first position sensor originally distributed near the rotating disc is transferred to the position on the same straight line between the two first chain wheels, and the identification when the rotating main body exceeds 360 degrees can be identified; and therefore, the arrangement limitation of the stop block and the limiting component is eliminated, and the continuous limiting requirement of more than 360 degrees is met.

Description

Technical Field

[0001] This utility model relates to the field of mechanical limiting technology, specifically to a limiting structure. Background Technology

[0002] In many mechanical motion systems, limiting structures are typically used to ensure that the movement range of components remains within a safe and effective range. Currently, common limiting structures are mainly based on mechanical stops and limit switches. These traditional limiting structures mostly only achieve limiting functions within a limited angular range (generally less than 360°). For example, in some rotating equipment, such as a rotating disk driven by a common motor shaft, fixed stops around the disk cooperate with corresponding limiting components on the equipment casing. When the disk rotates to a set angle, the stops contact the limiting components, preventing further rotation. However, due to the limitations in the arrangement of the stops and limiting components, this method is difficult to achieve continuous limiting beyond 360°. Utility Model Content

[0003] The purpose of this utility model is to design a limiting structure to solve the problems raised in the background art. To achieve the above objective, this utility model provides the following technical solution: a support frame fixed to a rotating body, a first sprocket fixed to a rotating disk of the rotating body, two second sprockets adjustablely mounted on the top of the support frame, a detection frame fixed to the top of the support frame and located between the two second sprockets, and a chain meshing with the first sprocket and the two second sprockets. The chain located between the two first sprockets passes through the detection frame, and a positioning block is fixed to the chain. The two ends of the detection frame are provided with first position sensors for identifying the positioning blocks.

[0004] Furthermore, the first position sensor is a photoelectric sensor, and the positioning block is a light-shielding plate that can block the light path of the photoelectric sensor.

[0005] Furthermore, the detection frame includes a support block fixedly connected to the support frame and a detection block fixedly connected to the support block, and the first position sensor is fixedly connected to both ends of the chain via a connecting plate.

[0006] Furthermore, a base plate is fixed to the support block, and the chain is located between the base plate and the detection block.

[0007] Furthermore, the detection block has notches at both ends for restricting the movement of the positioning block. The initial position of the positioning block is located inside one of the notches, and at this time the positioning block is in contact with the end of the notch.

[0008] Furthermore, the positioning block consists of two parts, which are respectively fixed to both sides of the chain.

[0009] Furthermore, the two first sprockets are at the same height, and the rotating disk rotates 450° when the positioning block moves from one first position sensor to the other.

[0010] Furthermore, a vertical plate is adjustablely connected to the top of the support frame, the first sprocket is rotatably connected to the vertical plate, a horizontal plate is adjustablely connected to the vertical plate, and a tensioning sprocket that meshes with the chain is rotatably connected to the horizontal plate.

[0011] Furthermore, the vertical plate is provided with a number of threaded holes, and the horizontal plate is provided with a number of slots respectively aligned with the threaded holes, and the bolt passes through the slots and is threadedly connected to the threaded holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is provided with two first sprockets and a second sprocket that are both engaged with the chain. The sprockets between the two first sprockets are in a straight line. Therefore, this utility model transfers the original first position sensor, which was distributed near the rotating disk, to a position between the two first sprockets on the same straight line, so as to identify when the rotating body exceeds 360°. This eliminates the limitations of the arrangement of the stop and the limiting component, and meets the continuous limiting requirements of more than 360°. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a magnified schematic diagram of a part of the present invention.

[0016] The components are as follows: 1001, detection frame; 1002, support frame; 1003, chain; 1004, rotating disk; 1005, first sprocket; 1006, second sprocket; 1007, first position sensor; 1008, detection block; 1009, positioning block; 1010, tension sprocket; 1011, vertical plate; 1012, slot; 1013, horizontal plate; 1014, base plate; 1015, notch. Detailed Implementation

[0017] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0018] Example: Please refer to Figure 1-2 A limiting structure includes a support frame 1002 fixedly connected to a rotating body, a first sprocket 1005 fixedly connected to a rotating disk 1004 of the rotating body, two second sprockets 1006 adjustablely mounted on the top of the support frame 1002, a detection frame 1001 fixedly connected to the top of the support frame 1002 and located between the two second sprockets 1006, and a chain 1003 meshing with the first sprocket 1005 and the two second sprockets 1006. The chain 1003 located between the two first sprockets 1005 passes through the detection frame 1001. 1. A positioning block 1009 is fixedly connected to the chain 1003. The two ends of the detection frame 1001 are equipped with a first position sensor 1007 for identifying the positioning block 1009. The first position sensor 1007 is a photoelectric sensor, and the positioning block 1009 is a light-shielding plate that can block the light path of the photoelectric sensor. The rotating body can be a DD motor. When the rotating body starts to rotate, it will drive the chain 1003 to rotate, thereby converting the circular motion of the rotating body into a linear motion of the chain 1003 (the straight section) that is easy to identify. The chain 1003 is equipped with a photoelectric sensor. When the light-shielding strip on the chain 1003 passes through the detection area of ​​the photoelectric sensor during rotation, the photoelectric sensor generates a corresponding electrical signal and transmits it to the control unit, thereby recognizing the rotation angle of the rotating body. When the positioning block 1009 moves from one first position sensor 1007 to another first position sensor 1007, the rotating disk 1004 rotates 450°, thereby eliminating the limitations of the arrangement of the stop and limit components and meeting the continuous limit requirements exceeding 360°. In addition, after receiving the sensor signal, the control unit will judge according to the preset limit angle value, rotation direction and other parameters. If the rotating body is about to exceed the preset limit range (-90° to 360°), the control unit will issue a control command to stop the rotation of the rotating body through the drive mechanism (such as a motor and its driver) connected to the rotating body, thereby achieving precise limit. The two first sprockets 1005 are located at the same height, which facilitates the adjustment of the positional relationship between the circular motion and the linear motion.

[0019] In this embodiment, the detection frame 1001 includes a support block fixedly connected to the support frame 1002 and a detection block 1008 fixedly connected to the support block. A first position sensor 1007 is fixedly connected to both ends of the chain 1003 via a connecting plate, thereby enabling the installation of the first position sensor 1007. A base plate 1014 is fixedly connected to the support block, and the chain 1003 is located between the base plate 1014 and the detection block 1008 to prevent the straight chain 1003 from bending. The measuring block 1008 has notches 1015 at both ends to restrict the movement of the positioning block 1009. The initial position of the positioning block 1009 is located inside one of the notches 1015, and at this time, the positioning block 1009 is in contact with the end of the notch 1015, thereby restricting the continued movement of the positioning block 1009. There are two positioning blocks 1009, which are respectively fixed to both sides of the chain 1003, ensuring the stability of the chain 1003 under force when in contact with the notch 1015, and preventing the chain 1009 from moving. 03 detaches from the second sprocket 1006; a vertical plate 1011 is adjustablely connected to the top of the support frame 1002, the first sprocket 1005 is rotatably connected to the vertical plate 1011, a horizontal plate 1013 is adjustablely connected to the vertical plate 1011, and a tension sprocket 1010 that meshes with the chain 1003 is rotatably connected to the horizontal plate 1013, thereby ensuring that the chain 1003 is in a tensioned state and preventing chain slippage; the vertical plate 1011 is provided with several threaded holes, and the horizontal plate 1013 is provided with several threaded holes... The slots 1012 are aligned with the threaded holes, and the bolts pass through the slots 1012 and are threaded into the threaded holes, thereby enabling the adjustable installation of the horizontal plate 1013 and ensuring the tension quality of the chain 1003. In addition, the adjustable connection between the support frame 1002 and the vertical plate 1011 can also adopt this form, thereby enabling the adjustment of the distance between the second sprockets 1006. The rotating connection methods mentioned above can all be achieved by connecting the shaft and the bearing, which will not be elaborated further here.

[0020] The working principle of this embodiment is as follows: When the rotating body starts to rotate, it will drive the chain to rotate, thereby converting the circular motion of the rotating body into the linear motion of the chain (the straight part of the chain) which is easy to identify. During this process, the light-shielding strip on the chain moves from one photoelectric sensor to another. The photoelectric sensor generates a corresponding electrical signal and transmits it to the control unit, thereby realizing the identification of the rotation angle of the rotating body. At this time, the rotating disk rotates 450°. Therefore, this invention eliminates the limitations of the arrangement of stops and limiting components, and meets the continuous limiting requirements of more than 360°.

[0021] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A limiting structure, characterized in that: The device includes a support frame (1002) to which a rotating body is fixedly attached, a first sprocket (1005) to which a rotating disk (1004) of the rotating body is fixedly attached, two second sprockets (1006) adjustablely mounted on the top of the support frame (1002), a detection frame (1001) fixed on the top of the support frame (1002) and located between the two second sprockets (1006), and a chain (1003) meshing with both the first sprocket (1005) and the two second sprockets (1006). The chain (1003) located between the two first sprockets (1005) passes through the detection frame (1001). A positioning block (1009) is fixedly attached to the chain (1003). The two ends of the detection frame (1001) are provided with first position sensors (1007) for identifying the positioning block (1009).

2. The limiting structure according to claim 1, characterized in that: The first position sensor (1007) is a photoelectric sensor, and the positioning block (1009) is a light shield that can block the light path of the photoelectric sensor.

3. The limiting structure according to claim 1, characterized in that: The detection frame (1001) includes a support block fixedly connected to the support frame (1002) and a detection block (1008) fixedly connected to the support block. The first position sensor (1007) is fixedly connected to both ends of the chain (1003) via a connecting plate.

4. The limiting structure according to claim 3, characterized in that: A base plate (1014) is fixedly connected to the support block, and the chain (1003) is located between the base plate (1014) and the detection block (1008).

5. The limiting structure according to claim 3, characterized in that: The detection block (1008) has notches (1015) at both ends for restricting the movement of the positioning block (1009). The initial position of the positioning block (1009) is located inside one of the notches (1015), and at this time the positioning block (1009) is in contact with the end of the notch (1015).

6. The limiting structure according to any one of claims 1-5, characterized in that: The positioning block (1009) consists of two blocks, which are respectively fixed to both sides of the chain (1003).

7. The limiting structure according to claim 1, characterized in that: The two first sprockets (1005) are at the same height, and the rotating disk (1004) rotates 450° when the positioning block (1009) moves from one first position sensor (1007) to another first position sensor (1007).

8. The limiting structure according to claim 1, characterized in that: A vertical plate (1011) is adjustablely connected to the top of the support frame (1002), and the first sprocket (1005) is rotatably connected to the vertical plate (1011). A horizontal plate (1013) is adjustablely connected to the vertical plate (1011), and a tension sprocket (1010) that meshes with the chain (1003) is rotatably connected to the horizontal plate (1013).

9. The limiting structure according to claim 8, characterized in that: The vertical plate (1011) is provided with a plurality of threaded holes, and the horizontal plate (1013) is provided with a plurality of slots (1012) respectively aligned with the threaded holes. The bolt passes through the slots (1012) and is threadedly connected to the threaded holes.

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