Hollow shaft angular displacement potentiometer convenient for series combination
By setting specific convex ring and shell convex ring structures at both ends of the hollow shaft angular displacement potentiometer, the reliable connection problem of traditional angular displacement potentiometers is solved when combined in series, and a high-precision and low-cost hollow shaft combination is achieved, reducing product volume and weight.
Patent Information
- Application Number
- CN202421717048.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-19
AI Technical Summary
Traditional angular displacement potentiometers are difficult to achieve reliable connection when combined in series, resulting in insufficient concentricity, large product volume, heavy weight, high consumable cost, and may reduce transmission accuracy.
A hollow shaft angular displacement potentiometer that is convenient for series combination is designed. By providing a first shaft convex ring and a second shaft convex ring at both ends of the hollow shaft, and a first shell convex ring and a second shell convex ring at both ends of the outer shell, the series combination and fixed connection between the hollow shaft is achieved by using the design of these convex rings and shell convex rings, and damage to the hollow shaft is avoided by the axial positioning connection.
A simple and reliable series combination between multiple hollow shaft angular displacement potentiometers is realized, which improves concentricity, saves connection space, reduces product volume and weight, reduces consumable costs, and ensures transmission accuracy.
Smart Images
Figure CN222838636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an angular displacement potentiometer (sensor), in particular to a hollow shaft angular displacement potentiometer which is convenient for series combination. Background Art
[0002] Angular displacement potentiometers (sensors) are used to detect angular displacement or control different voltage outputs. Angular displacement potentiometers based on conductive plastic resistors have the advantages of high precision and long life. They are widely used in industries such as industry, shipping, aviation, aerospace, etc. with high technical indicators and various harsh test requirements.
[0003] In practical applications, it is also a common application method to combine multiple angular displacement potentiometers in series. In this way, the shafts of multiple angular displacement potentiometers can be driven to rotate synchronously by a rotating drive component to realize angular displacement detection functions with different functions or control different types of output voltage functions.
[0004] Traditional angular displacement potentiometers, regardless of whether their rotating shafts are hollow shafts or solid shafts, cannot be directly and reliably connected between the rotating shafts of two angular displacement potentiometers. Instead, they need to be connected through a coupling, which is not only troublesome, but may also have problems with insufficient concentricity. There is also a problem that the connection space is large, resulting in a larger volume, heavier weight, and higher consumables cost for the entire combined product. In addition, the rotating shaft may be scratched during the connection process through the coupling, reducing the transmission accuracy. Utility Model Content
[0005] The purpose of the utility model is to provide a hollow shaft angular displacement potentiometer which is convenient for series combination in order to solve the above problems.
[0006] The utility model achieves the above-mentioned purpose through the following technical solutions:
[0007] A hollow shaft angular displacement potentiometer that is easy to combine in series, comprising an outer shell, an end cover, a hollow shaft and an internal component, wherein the end cover is connected to the outer shell, and the two ends of the hollow shaft respectively pass through the corresponding through holes on the outer shell and the corresponding through holes on the end cover and can rotate freely, and the internal component is installed in the shell cavity formed by the outer shell and the end cover, one end of the hollow shaft extends axially outward to form a first shaft convex ring, and the other end of the hollow shaft extends axially outward to form a second shaft convex ring, the inner diameter of the first shaft convex ring is greater than the outer diameter of the second shaft convex ring, the circumferential inner wall surface of the first shaft convex ring is provided with at least one inner wall plane, and the circumferential outer wall surface of the second shaft convex ring is provided with at least one outer wall plane, and the inner wall plane and the outer wall plane are parallel to each other.
[0008] Preferably, in order to realize the fixed connection function between the two hollow shaft angular displacement potentiometers through the outer shell, thereby avoiding damage to the hollow shaft caused by the axial positioning connection between the two hollow shafts, the end of the outer shell corresponding to the first shaft convex ring extends axially outward to form a first shell convex ring, and the first shell convex ring is located outside the first shaft convex ring. The end of the outer shell corresponding to the second shaft convex ring extends axially outward to form a second shell convex ring, and the second shell convex ring is located outside the second shaft convex ring. The inner diameter of the first shell convex ring is larger than the outer diameter of the second shell convex ring, and the side wall of the first shell convex ring is provided with radial screw holes.
[0009] Preferably, in order to better realize the anti-rotation connection function between the two hollow shafts, the number of the inner wall plane and the number of the outer wall plane are both two and they are located on two opposite sides of the hollow shaft respectively.
[0010] Preferably, in order to realize the high-precision angular displacement detection function, the hollow shaft is connected to the corresponding through-hole wall of the shell through a bearing, and the internal components include an insulating sleeve, a conductive plastic resistor, a collector ring and a brush. The insulating sleeve is sleeved on the hollow shaft, and the hollow shaft passes through the central through-hole of the conductive plastic resistor. The collector ring is sleeved on the insulating sleeve, and the brush is installed on the collector ring and contacts the working surface of the conductive plastic resistor.
[0011] The beneficial effects of the utility model are:
[0012] The utility model arranges a first shaft convex ring and a second shaft convex ring at both ends of a hollow shaft respectively, the inner diameter of the first shaft convex ring is larger than the outer diameter of the second shaft convex ring and at least one plane fit for anti-rotation is provided between the two, and the second shaft convex ring and the second shaft convex ring are provided between the two, and the series combination of multiple hollow shaft angular displacement potentiometers can be realized by only placing the second shaft convex rings of two adjacent hollow shaft angular displacement potentiometers in the first shaft convex ring, the operation is simple and reliable, the concentricity between the multiple hollow shafts is high, and the connection space is saved, thereby reducing the volume and weight of the entire combined product and reducing the cost of consumables; the first shell convex ring and the second shell convex ring are respectively arranged at both ends of the shell, and the first shell convex ring and the second shell convex ring of the two adjacent hollow shaft angular displacement potentiometers are used to realize fixed connection, and there is no need to arrange an axial positioning structure between the two adjacent hollow shafts, so that the hollow shafts can be prevented from being scratched and the transmission accuracy is ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a front sectional view of the hollow shaft angular displacement potentiometer convenient for series combination described in the utility model;
[0014] Figure 2 It is a left view of the hollow shaft angular displacement potentiometer convenient for series combination described in the utility model;
[0015] Figure 3 It is a front cross-sectional view of the hollow shaft angular displacement potentiometer which is convenient for series combination according to the utility model after being connected in series when used. DETAILED DESCRIPTION
[0016] The utility model is further described below in conjunction with the accompanying drawings:
[0017] like Figure 1 and Figure 2 As shown, the hollow shaft angular displacement potentiometer convenient for series combination described in the utility model comprises a shell 5, an end cover 12, a hollow shaft 7 and an internal component, the end cover 12 is connected to the shell 5, the two ends of the hollow shaft 7 respectively pass through the corresponding through holes on the shell 5 and the corresponding through holes on the end cover 12 and can rotate freely, the internal component is installed in the shell cavity formed by the shell 5 and the end cover 12, one end of the hollow shaft 7 extends axially outward to form a first shaft convex ring 3, the other end of the hollow shaft 7 extends axially outward to form a second shaft convex ring 15, the inner diameter of the first shaft convex ring 3 is slightly larger than the outer diameter of the second shaft convex ring 15, the circumferential inner wall surface of the first shaft convex ring 3 is provided with at least one inner wall plane 4, the circumferential outer wall surface of the second shaft convex ring 15 is provided with at least one outer wall plane 14, and the inner wall plane 4 and the outer wall plane 14 are parallel to each other.
[0018] like Figure 1 and Figure 2 As shown, the utility model also discloses the following more optimized specific structures:
[0019] In order to realize the fixed connection function between the two hollow shaft angular displacement potentiometers through the shell 5, thereby avoiding damage to the hollow shaft 7 caused by the axial positioning connection between the two hollow shafts 7, the end of the shell 5 corresponding to the first shaft convex ring 3 extends in the axial outward direction to form a first shell convex ring 1, and the first shell convex ring 1 is located outside the first shaft convex ring 3. The end of the shell 5 corresponding to the second shaft convex ring 15 extends in the axial outward direction to form a second shell convex ring 13, and the second shell convex ring 13 is located outside the second shaft convex ring 15. The inner diameter of the first shell convex ring 1 is slightly larger than the outer diameter of the second shell convex ring 13. A radial screw hole 2 is provided on the side wall of the first shell convex ring 1. The screw hole 2 can be one or two. If there are two, they are symmetrically distributed on the side wall of the first shell convex ring 1. A positioning groove can also be provided at the position corresponding to the screw hole 2 on the outer wall of the second shell convex ring 13 to achieve a more accurate and reliable positioning connection function.
[0020] In order to better realize the anti-rotation connection function between the two hollow shafts 7 , there are two inner wall planes 4 and two outer wall planes 14 , which are respectively located on two opposite sides of the hollow shaft 7 .
[0021] In order to realize the high-precision angular displacement detection function, the hollow shaft 7 is connected to the corresponding through-hole wall of the housing 5 through the bearing 6. The internal components include an insulating sleeve 8, a conductive plastic resistor 9, a collector ring 11 and a brush 10. The insulating sleeve 8 is sleeved on the hollow shaft 7, and the hollow shaft 7 passes through the central through-hole of the conductive plastic resistor 9. The collector ring 11 is sleeved on the insulating sleeve 8. The brush 10 is installed on the collector ring 11 and contacts the working surface of the conductive plastic resistor 9.
[0022] like Figure 1-Figure 3 As shown, when used, the second shaft convex rings 15 of two adjacent hollow shaft angular displacement potentiometers are placed in the first shaft convex ring 3, and the corresponding inner wall plane 4 and outer wall plane 14 are made to fit each other, and at the same time, the second shell convex ring 13 is placed in the first shell convex ring 1, and the connecting screws 16 are installed in the screw holes 2 and pressed against the outer wall of the second shell convex ring 13, so that the series connection between the two adjacent hollow shaft angular displacement potentiometers is completed. Figure 3 The figure shows a series combination structure between two hollow shaft angular displacement potentiometers. According to actual needs, it can also be a series combination structure between more hollow shaft angular displacement potentiometers.
[0023] After the connection, the overall product only needs to connect the rotating drive component to the first shaft convex ring 3 or the second shaft convex ring 15 of one of the hollow shaft angular displacement potentiometers at both ends to realize the function of synchronous rotation drive of the hollow shafts 7 of all hollow shaft angular displacement potentiometers, thereby realizing the function of multiple groups of angular displacement signal detection.
[0024] The above embodiments are only preferred embodiments of the present utility model and are not limitations on the technical solutions of the present utility model. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present utility model.
Claims
1. A hollow shaft angular displacement potentiometer convenient for series combination, comprising a shell, an end cover, a hollow shaft and an internal component, wherein the end cover is connected to the shell, the two ends of the hollow shaft respectively pass through the corresponding through holes on the shell and the corresponding through holes on the end cover and can rotate freely, and the internal component is installed in the shell cavity formed by the shell and the end cover, characterized in that: One end of the hollow shaft extends axially outward to form a first shaft protrusion ring, and the other end of the hollow shaft extends axially outward to form a second shaft protrusion ring. The inner diameter of the first shaft protrusion ring is greater than the outer diameter of the second shaft protrusion ring. The circumferential inner wall surface of the first shaft protrusion ring is provided with at least one inner wall plane, and the circumferential outer wall surface of the second shaft protrusion ring is provided with at least one outer wall plane, and the inner wall plane is parallel to the outer wall plane.
2. The hollow shaft angular displacement potentiometer convenient for series combination according to claim 1, characterized in that: One end of the outer shell corresponding to the first shaft protrusion ring extends in the axial outward direction to form a first shell protrusion ring, and the first shell protrusion ring is located outside the first shaft protrusion ring. One end of the outer shell corresponding to the second shaft protrusion ring extends in the axial outward direction to form a second shell protrusion ring, and the second shell protrusion ring is located outside the second shaft protrusion ring. The inner diameter of the first shell protrusion ring is larger than the outer diameter of the second shell protrusion ring, and the side wall of the first shell protrusion ring is provided with a radial screw hole.
3. The hollow shaft angular displacement potentiometer convenient for series combination according to claim 1 or 2, characterized in that: There are two inner wall planes and two outer wall planes, which are respectively located on two opposite sides of the hollow shaft.
4. The hollow shaft angular displacement potentiometer convenient for series combination according to claim 1 or 2, characterized in that: The hollow shaft is connected to the corresponding through-hole wall of the shell through a bearing, and the internal components include an insulating sleeve, a conductive plastic resistor, a collector ring and a brush. The insulating sleeve is sleeved on the hollow shaft, and the hollow shaft passes through the central through-hole of the conductive plastic resistor. The collector ring is sleeved on the insulating sleeve, and the brush is installed on the collector ring and contacts the working surface of the conductive plastic resistor.