Stroke type weight sensor
By combining the sensing column and sliding sleeve structure and utilizing the flexibility of the cable to adapt to deformation, the problem of vibration and lateral displacement of the weight sensor in the dynamic environment of the vehicle is solved, thus achieving accurate measurement and improved equipment durability.
Patent Information
- Application Number
- CN202520168620.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Existing weight sensors have difficulty effectively filtering out vibration interference in dynamic vehicle environments, and their rigid connection design is easily damaged when shifted laterally, affecting measurement accuracy and equipment lifespan.
The device employs a combination structure of an induction column, a sliding sleeve, and a cable. The induction column is a cylindrical capacitor, and the sliding sleeve moves on the induction column via the cable. The weight is measured by the change in the induced electric field. The cable is flexible to accommodate deformation, and bearings and rubber plugs are used for limiting and protection.
It enables accurate weight measurement under complex motion conditions, improves the integration and durability of the equipment, reduces its size, and enhances its adaptability to vibration and lateral displacement.
Smart Images
Figure CN223883062U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of sensor, especially relates to a stroke type weight sensor. BACKGROUND
[0002] The weight sensor is an electronic component specially designed to accurately output weight data under pressure conditions. For the specific application of vehicle load bearing, its technical requirements are particularly complex and diverse, mainly reflected in the following two aspects:
[0003] ① Considering that vehicles operate in a dynamic environment and are continuously in a driving state with vibration. This dynamic characteristic requires the weight sensor to effectively filter out vibration interference caused by uneven road surfaces or vehicle movement. Ordinary stroke sensors often fail to perform well in such environments because they lack effective vibration filtering mechanisms. Long-term exposure to vibration may damage the internal structure of the sensor, affecting measurement accuracy and even device lifespan.
[0004] ② In actual use, the vehicle body and axle not only undergo vertical displacement, but also may experience lateral deviation. Existing stroke sensors mostly adopt a rigid connection design at both ends. This design is prone to rigid interference when facing lateral deviation due to the limitations of rigid connection, resulting in damage to the sensor structure or a significant decrease in measurement accuracy. Therefore, for vehicle load bearing applications, the sensor needs to have higher flexibility and adaptability to cope with complex motion states, ensuring measurement accuracy and device durability.
[0005] The disclosed technical document of Chinese patent discloses a stroke detection type load monitoring device, application number: 2022225355173, which adopts a double spring column mechanism to monitor the relative position difference of two spring columns to obtain the load weight of the vehicle. This monitoring mechanism filters out vibration through the spring column, but the spring column assembly that works in a swinging and vibrating environment for a long time may face the challenge of metal fatigue, which requires strict numerical verification procedures in subsequent maintenance to ensure measurement accuracy. In addition, the physical structure characteristics of the spring column may cause the measured object to undergo slight displacement in the horizontal direction (i.e., jumping), which may interfere with the reading accuracy and affect the reliability of the final load monitoring result. Finally, the overall mechanism of this detection method is relatively redundant, and the device is large in size. UTILITY MODEL CONTENTS
[0006] The utility model provides a stroke type weight sensor, which aims to improve the monitoring accuracy of weight and enhance the integration of the device.
[0007] In order to achieve the above object, the utility model provides a stroke type weight sensor, including the shell for and fixed platform connection and the inhaul cable for and the movable platform connection relative to fixed platform movement, still include the induction column for inductive slider stroke, induction column vertical fixed setting in the induction cavity of shell reservation, slidingly fit on the induction column sliding sleeve, sliding sleeve linearly restricts in induction column outside can linearly move in the induction cavity, wherein, the induction column is the induction capacitance of column shape, the fixed end of inhaul cable is fixed on the fixed platform, and the movable end of inhaul cable is from the shell and goes out, and the gravity direction of sliding sleeve coincides with the extension path of inhaul cable, and sliding sleeve moves on induction column when inhaul cable is pulled.
[0008] Further, the sliding sleeve has a counterweight vertically extending to one side, the counterweight is limited in a follow-up cavity parallel to the induction cavity, the counterweight is carried on the inhaul cable, and the fixed end of the inhaul cable is fixed in the follow-up cavity.
[0009] Further, it further includes a bearing, the bearing is rollingly fitted in the shell, the top of the bearing is level with the top end of the induction column, and the fixed end of the inhaul cable is connected to the upper part of the follow-up cavity through the top of the bearing and below the counterweight.
[0010] Further, the bearing is located in the reserved position in the shell on one side of the follow-up cavity, and the connection position of the fixed end of the inhaul cable and the follow-up cavity is flush with the top end of the induction column.
[0011] Further, the sliding sleeve is hung by the inhaul cable on the upper part of the induction column, and the movable end of the inhaul cable is connected to the lower part of the shell.
[0012] Further, the induction column is provided with a rubber plug sleeve at both ends.
[0013] Further, it further includes a rubber tube sleeve, the rubber tube sleeve is parallel to the induction column, the rubber tube sleeve is fixed below the shell, and the inhaul cable is inserted into the shell from the rubber tube sleeve.
[0014] Compared with the prior art, the stroke type weight sensor has the following advantages:
[0015] The functions and characteristics of the induction column, the sliding sleeve and the inhaul cable are ingeniously combined, wherein the inhaul cable can freely adapt to various deformations due to its excellent flexibility. The inhaul cable not only can effectively pull the sliding sleeve to move, but also can effectively absorb and convert the deformation in the horizontal and vertical directions into the displacement of the sliding sleeve during the movement. This design ensures that the movement of the sliding sleeve can be accurately identified when it is driven by the inhaul cable, and the corresponding weight value can be obtained through electric field conversion. Even in a high deformation state, the inhaul cable can still maintain its pulling function, realizing the dual optimization of function and adaptability.
[0016] The overall structure of the sensor is more compact, the pull cable innovatively replaces the traditional support rod, the sliding sleeve is precisely assembled on the induction column, and the pull cable and the sliding block are skillfully arranged on one side, the integration and compactness of the mechanism are greatly improved, and the volume is further reduced. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The utility model provides a kind of overall structural diagram of stroke type weight sensor.
[0018] Figure 2 The utility model provides a kind of internal structure diagram of shell of stroke type weight sensor.
[0019] Figure 3 The utility model provides a kind of combination structural diagram of induction column, sliding sleeve and pull cable of stroke type weight sensor.
[0020] Figure 4 The utility model provides a kind of internal structure sectional view of stroke type weight sensor. DETAILED DESCRIPTION
[0021] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model is further described in detail with the drawings Figures 1-4 and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.
[0022] In combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , the utility model provides a kind of stroke type weight sensor, including the shell 5 for being connected with fixed platform and the pull cable 6 for being connected with movable platform relative to fixed platform,
[0023] It needs to be explained that the utility model is arranged between the frame and the axle, the shell 5 is fixed on the frame, the axle has the activity amount of moving up and down relative to the frame, further include the induction column 1 for inductive sliding block stroke, the induction column 1 is vertically fixed in the induction cavity a reserved in the shell 5, the induction column 1 is set as vertical posture, sliding sleeve 5 is slidably equipped on the induction column 1, sliding sleeve 5 is linearly constrained outside the induction column 1 and can move linearly in the induction cavity a along the induction column 1, the induction column 1 is the induction capacitor of column shape, the fixed end of the cable 6 is fixed on the fixed platform, i.e. the axle, the movable end of the cable 6 is from the shell 5, the gravity direction of sliding sleeve 5 coincides with the extension path of the cable 6, and sliding sleeve 5 moves synchronously on the induction column 1 when the cable 6 is pulled.
[0024] Reference Figure 2 And Figure 3 As shown in the figure, the sliding sleeve 5 has a counterweight 3 extending vertically to one side, and the two sides of the counterweight 3 also have a protrusion respectively, and a slide b is formed in the follow-up cavity respectively matched with the protrusion, the protrusion is matched in the slide b, so that the counterweight 3 is limited in the follow-up cavity parallel to the induction cavity a and can slide up and down along the follow-up cavity.
[0025] In order to facilitate the synchronous action of the counterweight 3 with the cable 6, a bearing 2 is also provided, which is rollably fitted in the shell 5, the bearing 2 is located in the reserved position in the shell 5 on one side of the follow-up cavity, the top of the bearing 2 is level with the top end of the induction column 1, the fixed end of the cable 6 passes over the top of the bearing 2 and then passes under the counterweight 3 to connect to the upper part of the follow-up cavity, the connection position of the fixed end of the cable 6 and the follow-up cavity is flush with the top end of the induction column 1, the sliding sleeve 5 is limited at the same time, and the counterweight 3 is carried on the cable 6 to make the sliding sleeve 5 hang on the upper part of the induction column 1, the movable end of the cable 6 passes through a pipe hole in communication with the position of the bearing 2 for the cable 6 to pass through and is connected to the lower part of the shell 5.
[0026] As Figure 3 As shown in the figure, the two ends of the induction column 1 are fitted with rubber tube sleeves 4, and the induction column 1 is limited in the induction cavity a by the two end rubber tube sleeves 4, the two ends of the shell 5 are fixedly connected with end covers to limit the positions of the induction column 1, the counterweight 3 and the bearing 2, a pipe hole is provided at the position where the cable 6 passes out, the cable 6 passes out of the pipe hole and into the rubber tube sleeve 4, the rubber tube is parallel to the induction column 1, the rubber tube sleeve 4 is fixed below the shell 5, and the cable 6 passes into the shell 5 from the rubber tube sleeve 4 to connect to the corresponding position of the axle.
[0027] In use, the shell 5 is fixed on the frame, the bottom end of the cable 6 is connected to the axle, when the vehicle carries goods, the frame is pressed down, at this time the sliding sleeve 5 is lifted on the upper part of the induction column 1, when the frame is pressed down, the relative displacement between the frame and the axle occurs, the cable 6 appears redundant length, the sliding sleeve 5 naturally falls along the induction column 1 under the action of gravity, in the falling process of the sliding sleeve 5, the induction column 1 itself is a cylindrical inductor and can induce the corresponding electric field change and the falling height of the sliding sleeve 5, thus through conversion, the carrying weight corresponding to the frame pressing-down height on the frame can be obtained.
[0028] It should be added that the induction column, i.e. the induction capacitor, can discharge to the outside, the sliding sleeve can be made of any one of high-resistance materials such as plastic film, porcelain and paper, therefore in the process of discharging to the induction cavity a, the sliding sleeve moving on the induction column can change the discharge amount of the induction column or the sliding sleeve moving on the induction column can change the electric field value between the induction column and the induction cavity a, and the induction column is powered by the built-in power supply part and the electric field value of the environment where the induction column is located is outputted to the outside, so as to realize the final result that the action of the sliding sleeve is converted into the carrying weight.
[0029] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A travel type weight sensor comprising a housing for connection to a fixed platform and a cable for connection to a moving platform relative to the fixed platform, characterised in that: Also include An induction column for sensing the stroke of the slider, the induction column is vertically fixed in the induction cavity reserved in the shell; A sliding sleeve slidingly fitted on the induction column, the sliding sleeve is linearly constrained on the outside of the induction column and can move linearly in the induction cavity along the induction column; Wherein, the induction column is a columnar induction capacitor, the fixed end of the cable is fixed on the fixed platform, the movable end of the cable passes out of the shell, the gravity direction of the sliding sleeve coincides with the extension path of the cable, and the sliding sleeve moves synchronously on the induction column when the cable is pulled.
2. A stroke type weight sensor according to claim 1, wherein: The sliding sleeve has a counterweight vertically extending to one side, the counterweight is limited in the follow-up cavity parallel to the induction cavity, the counterweight is carried on the cable, and the fixed end of the cable is fixed in the follow-up cavity.
3. A stroke type weight sensor according to claim 2, wherein: Also include a bearing, the bearing is rollingly fitted in the shell, the top of the bearing is level with the top end of the induction column, and the fixed end of the cable passes through the top of the bearing and then passes below the counterweight to be connected to the upper part of the follow-up cavity.
4. A stroke type weight sensor according to claim 3, wherein: The bearing is located in the reserved position in the shell on one side of the follow-up cavity, and the connection position of the fixed end of the cable to the follow-up cavity is flush with the top end of the induction column.
5. The stroke type weight sensor according to claim 1, wherein The sliding sleeve is vertically hung on the upper part of the induction column by the cable, and the movable end of the cable is connected to the lower part of the shell.
6. The stroke type weight sensor according to claim 1, wherein Both ends of the induction column are fitted with rubber plug sleeves.
7. The stroke type weight sensor according to claim 1, wherein Also include a rubber tube sleeve, the rubber tube sleeve is parallel to the induction column, the rubber tube sleeve is fixed below the shell, and the cable passes into the shell from the rubber tube sleeve.
8. The stroke type weight sensor according to claim 1, wherein, The material of the sliding sleeve is any one of a plastic film, a ceramic medium and a paper medium.