Stay wire displacement sensor adaptable to various hole type encoders

Abstract

The utility model discloses a stay wire displacement sensor adaptable to various hole type encoders, and belongs to the technical field of stay wire displacement sensors. The structure comprises a shell, a bottom plate, a wire wheel wound with a steel wire rope and a coil spring capable of resetting the wire wheel, the steel wire rope penetrates through the shell to reach the outside, a first transmission shaft and a second transmission shaft are arranged on the two sides of the center position of the wire wheel respectively, and the first transmission shaft is rotationally connected to the center position of the bottom plate; the second transmission shaft is rotationally connected to the center of the shell, a variable-diameter shaft is slidably connected into the first transmission shaft through a sliding assembly, and one end of the variable-diameter shaft penetrates through the bottom plate and is fixedly connected into a hole of the transmission shaft of the rotary encoder through a second fastener. According to the utility model, various hole type encoders can be used, the applicability is higher, the use is more convenient, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wire displacement sensor technology, specifically a wire displacement sensor that can be adapted to various hole encoders. Background Technology

[0002] Wire displacement sensors are ingeniously designed linear displacement sensors, combining the advantages of angle and linear displacement sensors. They are characterized by small installation size, compact structure, large measuring stroke, and high accuracy. Wire displacement sensors typically use encoders to convert linear displacement distance into signals usable for communication, transmission, and storage. Encoders are classified into shaft-type and bore-type according to their mechanical mounting method. Different models of bore-type encoders have different bore diameters and lengths. To accommodate different models of bore-type encoders, wire displacement sensors with different drive shaft models need to be designed. This not only affects the mass production of wire displacement sensors but also limits the selection options and inconvenience when a bore encoder fails, requiring replacement with the same model. Therefore, it is necessary to design a wire displacement sensor that can adapt to multiple models of bore encoders, enabling the wire displacement sensor to be compatible with various bore encoder types. Utility Model Content

[0003] The purpose of this invention is to provide a wire displacement sensor that can be adapted to various hole encoders, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A draw wire displacement sensor adaptable to various hole encoders includes a housing, a base plate, a reel wound with a steel wire rope, and a coil spring capable of resetting the reel. The reel is rotatably mounted at the center of the housing cavity. One end of the steel wire rope is fixed to the reel, and the other end of the steel wire rope passes through the housing to the outside. A first drive shaft and a second drive shaft are fixedly connected to both sides of the center of the reel, respectively. The first drive shaft is rotatably connected to the center of the base plate, and the second drive shaft is rotatably connected to the center of the housing. A variable diameter shaft is slidably connected inside the first drive shaft via a sliding assembly. One end of the variable diameter shaft passes through the base plate and is fixedly connected to the hole of the rotary encoder drive shaft by a second fastener.

[0006] As a further embodiment of this utility model: the sliding component includes a sliding groove and a fastener, the sliding groove is disposed on the outside of the variable diameter shaft, and one end of the fastener passes through the drive shaft and is slidably connected to the sliding groove.

[0007] As a further embodiment of this utility model: a disc spring box is fixedly installed on the outside of the housing, a disc spring is provided inside the disc spring box, one end of the second transmission shaft passes through the center of the housing and is rotatably connected to the housing, and one end of the second transmission shaft is fixedly connected to one end of the disc spring.

[0008] As a further embodiment of this utility model: a rotary encoder is fixedly installed on the outer side of the base plate, and a rotary encoder drive shaft is rotatably installed on the rotary encoder, with a shaft hole opened at one end of the rotary encoder drive shaft.

[0009] As a further embodiment of this utility model: a cable outlet tube is provided on one side of the housing, a cable outlet assembly is provided at one end of the cable outlet tube, a cable groove is provided inside the cable outlet tube, the cable groove is connected to the inner cavity of the housing, and one end of the steel wire rope reaches the outside through the cable groove and the cable outlet assembly.

[0010] As a further embodiment of this utility model: the first transmission shaft is rotatably connected to the center position of the base plate via a first bearing, and the second transmission shaft is rotatably connected to the housing via a second bearing.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] By setting sliding components on the variable diameter shaft and the first transmission shaft, the fitting length between the variable diameter shaft and the rotary encoder hole can be guaranteed, enabling the wire displacement sensor to be adapted to encoders with various hole lengths. At the same time, the first fastener can secure the variable diameter shaft, and loosening the first fastener can slide the variable diameter shaft out for easy replacement. Attached Figure Description

[0013] Figure 1 This is a top cross-sectional view of a wire displacement sensor that can be adapted to various hole encoders.

[0014] Figure 2 A cross-sectional view of the front view of a wire displacement sensor that can be adapted to various hole encoders;

[0015] Figure 3 A three-dimensional view of a wire displacement sensor that can be adapted to various hole encoders;

[0016] Figure 4 This is a diagram showing the fit between the disc spring and the second drive shaft in a wire displacement sensor that can be adapted to various hole encoders.

[0017] In the diagram: 1. Rotary encoder; 2. Rotary encoder drive shaft; 3. First bearing; 4. Drive shaft one; 5. Steel wire rope; 6. Screw; 7. Disc spring; 8. Second bearing; 9. Drive shaft two; 10. Disc spring box; 11. Housing; 12. Wire reel; 13. Base plate; 14. Fastener one; 15. Slide groove; 16. Fastener two; 17. Variable diameter shaft; 18. Wire outlet assembly; 19. Outlet tube; 20. Wire groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please see Figure 1-4 This embodiment provides a pull-wire displacement sensor adaptable to various hole encoders, including a housing 11, a base plate 13, a reel 12 wound with a steel wire rope 5, and a coil spring 7 capable of resetting the reel 12. Preferably, the base plate 13 is fixedly mounted on one side of the housing 11 by screws 6. The reel 12 is rotatably disposed at the center of the inner cavity of the housing 11. One end of the steel wire rope 5 is fixed to the reel 12, and the other end of the steel wire rope 5 passes through the housing 11 to the outside. A drive shaft 4 and a drive shaft 9 are respectively disposed on both sides of the center of the reel 12. The drive shaft 4 is rotatably connected to the center of the base plate 13 through a first bearing 3, and the drive shaft 9 is rotatably connected to the housing 11 through a second bearing 8. Preferably, the reel 12... The first drive shaft 4 and the second drive shaft 9 are integrated to improve the stability of the device. The first drive shaft 4 is rotatably connected to the center of the base plate 13. A variable diameter shaft 17 is slidably connected inside the first drive shaft 4. A groove 15 is provided on the outer side of the variable diameter shaft 17. The first fastener 14 is passed through the first drive shaft 4 and is slidably connected to the groove 15. Preferably, the first fastener 14 is a fastening screw. One end of the variable diameter shaft 17 passes through the base plate 13 and is fixedly connected to the hole of the rotary encoder drive shaft 2 by the second fastener 16. Preferably, the second fastener 16 is a fastening screw. The rotary encoder 1 is fixedly installed on the outer side of the base plate 13, and the rotary encoder drive shaft 2 is rotatably installed on the rotary encoder 1.

[0021] Furthermore, a disc spring box 10 is fixedly installed on the outside of the housing 11, and a disc spring 7 is provided inside the disc spring box 10. One end of the transmission shaft 9 passes through the center of the housing 11 and is rotatably connected to the housing 11. One end of the transmission shaft 9 is fixedly connected to one end of the disc spring 7.

[0022] Furthermore, a cable outlet tube 19 is provided on one side of the housing 11. Preferably, the position of the cable outlet tube 19 is flush with the top of the reel 12. A cable outlet assembly 18 is provided at one end of the cable outlet tube 19. Preferably, the cable outlet assembly 18 includes a connector, a wire rope limiting member, and a cable outlet head that are fixedly connected in sequence. One end of the connector is fixedly connected to the cable outlet tube 19 to ensure stability when the wire rope 5 is pulled out and to improve measurement accuracy. A cable groove 20 is provided inside the cable outlet tube 19. The cable groove 20 communicates with the inner cavity of the housing 11. One end of the wire rope 5 reaches the outside through the cable groove 20 and the cable outlet assembly 18.

[0023] Working principle:

[0024] Adjust the variable diameter shaft 17 according to the inner diameter and length of the hole in the rotary encoder drive shaft 2. Select a variable diameter shaft 17 with an appropriate diameter based on the inner diameter of the shaft hole. Then, adjust the length of the variable diameter shaft 17 extending from the drive shaft 4 according to the length of the rotary encoder drive shaft 2. Loosen the fastener 14 to allow the variable diameter shaft 17 to slide within the drive shaft 4. Once it has slid to the appropriate position, tighten the variable diameter shaft 17 again using the fastener 14 to ensure that the fit between the variable diameter shaft 17 and the shaft hole of the encoder drive shaft 2 is not too short, which could cause slippage. Then, fastener 16 is used to fix the variable diameter shaft 17 and the encoder drive shaft 2. The wire rope 5 is pulled to make the pulley 12 rotate, which in turn drives the drive shaft 4 and the drive shaft 9 to rotate. The rotation of the drive shaft 4 drives the variable diameter shaft 17 to rotate, which in turn drives the rotary encoder drive shaft 2 to rotate, transmitting the rotation signal to the rotary encoder 1. The rotation of the drive shaft 9 causes the coil spring 7 to deform. When the pulley 12 needs to be reset, the external tension on the wire rope 5 is removed, the coil spring 7 returns to its original shape, and then drives the drive shaft 9 to reverse, so that the pulley 12 is reset.

[0025] It should be noted that the above embodiments are only specific and clear descriptions of the technical solutions and features of this application. Solutions or features that are prior art or common knowledge to those skilled in the art will not be described in detail in the above embodiments.

[0026] Furthermore, the technical solutions of this application are not limited to the above embodiments. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A draw wire displacement sensor adaptable to various hole encoders, comprising a housing (11), a base plate (13), a reel (12) wound with a steel wire rope (5), and a coil spring (7) capable of resetting the reel (12), characterized in that, The steel wire rope (5) passes through the housing (11) to reach the outside. The center of the reel (12) is provided with a first drive shaft (4) and a second drive shaft (9) on both sides. The first drive shaft (4) is rotatably connected to the center of the base plate (13), and the second drive shaft (9) is rotatably connected to the center of the housing (11). The first drive shaft (4) is slidably connected to a variable diameter shaft (17) through a sliding component. One end of the variable diameter shaft (17) passes through the base plate (13) and is fixedly connected to the hole of the rotary encoder drive shaft (2) by a second fastener (16).

2. A draw wire displacement sensor adaptable to various hole encoders according to claim 1, characterized in that, The sliding assembly includes a slide groove (15) and a fastener (14). The slide groove (15) is located on the outside of the variable diameter shaft (17). One end of the fastener (14) passes through the drive shaft (4) and is slidably connected to the slide groove (15).

3. A draw wire displacement sensor adaptable to various hole encoders according to claim 1, characterized in that, A disc spring box (10) is fixedly installed on the outside of the housing (11). A disc spring (7) is provided inside the disc spring box (10). One end of the second transmission shaft (9) passes through the center of the housing (11) and is rotatably connected to the housing (11). One end of the second transmission shaft (9) is fixedly connected to one end of the disc spring (7).

4. A draw wire displacement sensor adaptable to various hole encoders according to claim 1, characterized in that, A rotary encoder (1) is fixedly installed on the outside of the base plate (13), and a rotary encoder drive shaft (2) is rotatably installed on the rotary encoder (1).

5. A draw wire displacement sensor adaptable to various hole encoders according to claim 1, characterized in that, A cable outlet pipe (19) is provided on one side of the housing (11), and a cable outlet assembly (18) is provided at one end of the cable outlet pipe (19). A cable groove (20) is provided inside the cable outlet pipe (19), and the cable groove (20) is connected to the inner cavity of the housing (11). One end of the steel wire rope (5) reaches the outside through the cable groove (20) and the cable outlet assembly (18).

6. A draw wire displacement sensor adaptable to various hole encoders according to claim 1, characterized in that, The first drive shaft (4) is rotatably connected to the center of the base plate (13) via the first bearing (3), and the second drive shaft (9) is rotatably connected to the housing (11) via the second bearing (8).

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