Limiting mechanism of electric rail type truck scale

Abstract

The utility model discloses a limiting mechanism of an electric rail type truck scale, and belongs to the technical field of truck scale equipment. Comprising a spring assembly, a limiting assembly and an elastic small ball, a mounting groove is horizontally and concavely formed in the inner wall of a foundation, a mounting opening is formed in the end face of the side, close to a weighing platform, of the mounting groove, the limiting assembly is arranged in an I shape, and the limiting assembly comprises a first limiting plate, a second limiting plate and a third limiting plate; the second limiting plate penetrates through the installation opening and can horizontally slide along the installation groove, the first limiting plate and the third limiting plate are installed at the two ends of the second limiting plate correspondingly, the spring assembly comprises a plurality of sets of springs, the two ends of each spring abut against the first limiting plate and the outer wall of the installation groove correspondingly, and the second limiting plate and the third limiting plate are installed on the second limiting plate. And the small ball is clamped between the mounting groove and the third limiting plate. According to the utility model, effective buffering on a large impact effect is realized, and the stability of the weighing platform and the weighing accuracy are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of weighbridge equipment, in particular to a limiting mechanism for an electric rail weighbridge. Background Technique

[0002] A weighbridge (platform scale) is a device used to measure the weight of vehicles and is widely used in the cargo transportation industry. It usually consists of a large platform or weighing table, load cells, and related metering and control systems. The vehicle driving onto the weighbridge will park on the weighing table for weighing. The load cells measure the weight of the vehicle and transmit the data to the metering and control system, and finally display the accurate weight value. The weighbridge limiting structure is a device installed under the weighing table to fix and limit the position of the weighing table. Its function is to limit the movement range of the weighing table in the vertical direction to maintain a stable and balanced state.

[0003] The existing weighbridge limiting structure is as shown in the Chinese application with the application number: 202320937510.6, a weighbridge with a limiting structure, which includes a weighing plate body, limiters, two seat bodies, and telescopic rods. The weighing plate body is used for weighing; multiple limiters are respectively arranged at both ends of the weighing plate body along the first direction. The limiters can be in contact with the weighing plate body to limit the movement of the weighing plate body along the first direction; the two seat bodies are respectively arranged on both sides of the weighing plate body along the first direction; the telescopic rods are supported by the seat bodies, and the telescopic rods are connected to the limiters. The telescopic rods can drive the limiters to reciprocate and be positioned along the first direction, so as to realize the limitation of the weighing plate and make the weighing plate more stable.

[0004] The existing technology has the following defects: in the above-mentioned limiting structure, only relying on the telescopic rods and limiters to achieve the buffering effect on the weighing table, its load capacity is weak and it cannot effectively resist the impact brought by large or heavy vehicles driving onto the weighbridge. When subjected to a large impact, the limiters may not be able to effectively buffer the weighing table, and may even be damaged, resulting in the instability of the weighing table, causing weighing errors and even damaging the mechanical components of the weighing instrument, affecting the stability and accuracy of the weighing table, so there is room for improvement. Content of the Utility Model

[0005] In order to solve the above-mentioned technical problems, the utility model provides a limiting mechanism for an electric rail weighbridge to solve the technical problems that the existing limiting structure cannot effectively buffer a large impact, affecting the stability of the weighing table and the weighing accuracy.

[0006] The utility model is realized through the following technical solutions:

[0007] A limiting mechanism for an electric rail truck scale, comprising a spring assembly, a limiting assembly and an elastic ball. An installation groove is horizontally recessed on the inner wall of the foundation. An installation opening is formed on the end face of the installation groove close to the weighing platform. The limiting assembly is arranged in an I shape. The limiting assembly includes a first limiting plate, a second limiting plate and a third limiting plate. The second limiting plate penetrates through the installation opening and can horizontally slide along the installation groove. The first limiting plate and the third limiting plate are respectively installed at both ends of the second limiting plate. The spring assembly includes a plurality of groups of springs. The two ends of the spring are respectively abutted against the first limiting plate and the outer wall of the installation groove. The ball is clamped between the installation groove and the third limiting plate.

[0008] Preferably, two reverse rods are horizontally arranged on the end face of the installation groove far away from the installation opening. The reverse rods are arranged on both sides of the ball and are arranged parallel to the movement direction of the second limiting plate. The length of the reverse rod is less than the diameter of the ball.

[0009] Preferably, the reverse rod is set as a cylinder, and the telescopic end of the cylinder is fixed to the side end face of the third limiting plate.

[0010] Preferably, a reinforcing rib is arranged between the first limiting plate and the second limiting plate.

[0011] Preferably, the outer peripheral surface of the third limiting plate is arranged in a shape matching the vertical cross-section of the installation groove, and the outer peripheral surface of the third limiting plate is in interference fit with the vertical cross-section of the installation groove.

[0012] Preferably, the second limiting plate is in interference fit with the installation opening.

[0013] Preferably, the contact surface between the third limiting plate and the ball is arranged as an arc surface.

[0014] Preferably, a rubber cushion layer is arranged on the side end face of the first limiting plate close to the weighing platform.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. By arranging a spring assembly in the limiting mechanism, the initial absorption of the impact force generated when the vehicle drives in or out is realized. Through the arrangement of the first limiting plate, the second limiting plate and the third limiting plate, multiple buffer levels are formed. When the impact force acts on the weighing platform, it is first received by the first limiting plate and transmitted to the spring assembly. At the same time, the second limiting plate transmits it to the elastic ball through the third limiting plate, gradually reducing the impact force, achieving the purpose of effectively buffering a larger impact force; the limiting mechanism effectively reduces the influence of external impact on the weighing platform, enabling the weighing platform to weigh in a relatively stable state, thereby improving the weighing accuracy;

[0017] 2. By setting up the reverse rod, the partial extrusion effect of the third limit plate on the small ball is offset, avoiding damage to the small ball due to excessive extrusion and facilitating the maintenance of the stability of the small ball. The reverse rod is set as a cylinder, enabling the adjustment of the distance between the reverse rod and the third limit plate. The cylinder adjusts the extension length according to the impact force on the weighing platform, avoiding rigid collision between the reverse rod and the third limit component. By adjusting the length of the reverse rod, the reverse supporting force applied to the third limit plate can be quickly adjusted, thereby reducing the impact force transmitted to the entire weighing platform and the weighing sensor, and improving the stability during the weighing process.

[0018] 3. Through the arc surface design, the contact area between the third limit plate and the small ball is relatively large, effectively dispersing the load and impact acting on the small ball, reducing local stress concentration, and prolonging the service life of the small ball. The arc-shaped contact surface can reduce the direct action of sudden forces when under pressure or impact. Due to the certain flexibility of the elastic small ball, it can quickly return to its original state after being impacted or pressed, improving the self-recovery ability of the small ball.

[0019] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, rather than limiting the present disclosure. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the following will describe the drawings required for use in the embodiments of the present invention or the background art.

[0021] The drawings here are incorporated into the specification and form a part of this specification. These drawings show embodiments that conform to the present disclosure and, together with the specification, are used to explain the technical solutions disclosed by the present invention.

[0022] Figure 1 Schematic diagram of the overall structure of the limit structure of the present invention in a weighbridge;

[0023] Figure 2 For Figure 1 the enlarged view in

[0024] Figure 3 Overall sectional view of the limit structure of the present invention and the weighbridge;

[0025] Figure 4 For Figure 3 the enlarged view at B in

[0026] Figure 5 For Figure 3 the enlarged view at C in

[0027] Legend: 1. Scale platform; 2. Weighing sensor; 3. Foundation; 4. Spring assembly; 5. Limit assembly; 51. First limit plate; 52. Second limit plate; 53. Third limit plate; 6. Small ball; 7. Installation groove; 8. Installation opening; 9. Reverse rod; 10. Reinforcing rib; 11. Rubber cushion layer. Detailed implementation manners

[0028] In order to enable those skilled in the art of the present technology to better understand the solutions of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, it should also be noted that, unless otherwise clearly defined and limited, the terms "set", "install", "connect", and "couple" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] The following will describe in detail some implementation manners of the present utility model in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0031] To further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following will describe in detail the specific implementation manners, structures, features, and effects of the present utility model in conjunction with the accompanying drawings and preferred embodiments.

[0032] Please refer to Figures 1-5, a limit mechanism for an electric rail weighbridge. The weighbridge includes a weighing platform 1 and load cells 2. The weighing platform 1 and load cells 2 are installed in a foundation 3. The limit mechanism is arranged between the gap of the weighing platform 1 and the foundation 3. It includes a spring assembly 4, a limit assembly 5 and elastic balls 6. An installation groove 7 is horizontally recessed on the inner wall of the foundation 3. An installation opening 8 is opened on the end face of the installation groove 7 close to the weighing platform 1. The limit assembly 5 is arranged in an I shape. The limit assembly 5 includes a first limit plate 51, a second limit plate 52 and a third limit plate 53. The second limit plate 52 passes through the installation opening 8 and can slide horizontally along the installation groove 7. The first limit plate 51 and the third limit plate 53 are respectively installed at both ends of the second limit plate 52. The spring assembly 4 includes several groups of springs. The two ends of the spring are respectively abutted against the first limit plate 51 and the outer wall of the installation groove 7. The balls 6 are clamped between the installation groove 7 and the third limit plate 53.

[0033] The operating principle of the limit mechanism in the present utility model is as follows:

[0034] The first limit plate 51 abuts against the edge of the weighing platform 1. The second limit plate 52 passes through the installation opening 8. The third limit plate 53 is located in the installation groove 7. An elastic ball 6 is abutted between the end face of the third limit plate 53 away from the second limit plate 52 and the inner wall of the installation groove 7. When a vehicle drives onto the weighbridge, the weighing platform 1 generates a slight shake. The edge of the weighing platform 1 presses the first limit plate 51, and the first limit plate 51 presses the spring. At the same time, the second limit plate 52 slides along the installation opening 8, and the third limit plate 53 slides horizontally along the installation groove 7 and presses against the elastic ball 6, realizing the buffering and limiting effects on the shake of the weighing platform.

[0035] The spring assembly 4 is provided in the limit mechanism, which provides elastic support between the weighing platform 1 and the foundation 3. The spring can absorb the impact force generated when a vehicle drives onto or off the weighbridge, reducing the adverse effects on the weighing platform 1. Through the arrangement of the first limit plate 51, the second limit plate 52 and the third limit plate 53, multiple buffering levels are formed. When an impact force acts on the weighing platform 1, it is first received by the first limit plate 51 and transmitted to the spring assembly 4. At the same time, the second limit plate 52 transmits it to the elastic ball 6 through the third limit plate 53, gradually reducing the impact force to achieve the purpose of effective buffering. The design of the limit assembly 5 ensures that when the weighing platform 1 is interfered by external forces, there is a clear displacement limit. The settings of the first limit plate 51 and the third limit plate 53 make the weighing platform 1 not move too far due to external impacts within the maximum allowable range, avoiding structural damage or weighing errors. The use of the elastic ball 6 enables it to play a further limiting and buffering role when the third limit plate 53 approaches the inner wall of the installation groove 7. This design ensures that the weighing platform 1 can quickly return to its original position under turbulent conditions. The limit mechanism effectively reduces the influence of external impacts on the weighing platform 1, enabling the weighing platform 1 to weigh in a relatively stable state, thereby improving the weighing accuracy.

[0036] In order to counteract the partial extrusion effect of the third limiting plate 53 on the small ball 6 and prevent the small ball 6 from being damaged due to excessive extrusion, in one embodiment, two groups of reverse rods 9 are horizontally arranged on the end faces of the installation groove 7 and the installation opening 8 that are far away from each other. The reverse rods 9 are arranged on both sides of the small ball 6 and are parallel to the movement direction of the second limiting plate 52. The length of the reverse rod 9 is less than the diameter of the small ball 6. When the weighing platform 1 shakes, the third limiting plate 53 exerts an extrusion effect on the small ball 6. When the second limiting plate 52 continues to squeeze the small ball 6, the reverse rod 9 abuts against the third limiting plate 53, which is used to counteract the partial extrusion effect of the third limiting plate 53 on the small ball 6, prevent the small ball 6 from being damaged due to excessive extrusion, is beneficial to maintaining the stability of the small ball 6, and at the same time enhances the buffering effect of the limiting mechanism on the weighing platform 1. The setting of the reverse rod 9 helps to reduce the direct extrusion of the third limiting plate 53 on the small ball 6. Since the length of the reverse rod 9 is less than the diameter of the small ball 6, it can form a spatial isolation effect between the small ball 6 and the third limiting plate 53. When the weighing platform 1 shakes and causes the third limiting plate 53 to displace, due to the existence of the reverse rod 9, the small ball 6 no longer directly bears all the pressure of the third limiting plate 53; since the force borne by the small ball 6 is reduced, permanent deformation or large friction caused by excessive extrusion force to the small ball 6 is avoided, and its elastic performance and stability are maintained; in the case of being extruded, the small ball 6 can recover to its original shape faster, maintaining the normal function of the limiting mechanism; the function of the reverse rod 9 makes the third limiting plate 53 not prone to deviation during the whole movement process, thereby improving the limiting accuracy and ensuring the reliability during weighing.

[0037] When the vehicle drives onto the weighing platform 1, the impact force received may vary due to differences in the vehicle's center of gravity, speed, and load. Different impact forces also result in different degrees of extrusion on the small ball 6. To prevent the third limit plate 53 from having a rigid collision with the reverse rod 9 under a large impact, and to maximize the protective effect of the limit rod on the small ball 6, in one embodiment, the reverse rod 9 is set as a cylinder, and the telescopic end of the cylinder is fixed to one side end face of the third limit plate 53. Setting the reverse rod 9 as a cylinder enables the adjustment of the distance between the reverse rod 9 and the third limit plate 53. The cylinder adjusts the extension length according to the magnitude of the impact force on the weighing platform 1, avoiding the rigid collision between the reverse rod 9 and the third limit component 5. By adjusting the length of the reverse rod 9, the reverse supporting force applied to the third limit plate 53 can be quickly adjusted, thereby reducing the impact force transmitted to the entire weighing platform 1 and the weighing sensor 2. This effectively avoids equipment damage or errors caused by instantaneous impact, reduces the direct friction between mechanical components, decreases the risk of wear and failure, and thus extends the service life of the equipment. When the weighing platform 1 is subjected to a sudden impact or overload, the adjustment ability of the cylinder can ensure an appropriate distance between the third limit plate 53 and the reverse rod 9, avoiding direct impact force and achieving the protection of the integrity of the limit mechanism. The cylinder can effectively absorb and buffer the mechanical vibrations and impacts generated during the dynamic process of the weighing platform 1, thereby reducing the sway of the weighing platform and improving the stability during the weighing process.

[0038] When the vehicle drives onto the weighbridge, the dynamic load borne by the weighing platform 1 may cause the first limit plate 51 to be greatly extruded. To avoid local deformation or damage and further enhance the buffering and limiting effect of this limit structure, in one embodiment, a reinforcing rib 10 is provided between the first limit plate 51 and the second limit plate 52. Setting the reinforcing rib 10 can effectively disperse these loads, making the stress distribution more uniform, thus avoiding local deformation or damage. By providing additional support and restraint, the fatigue damage of the material under cyclic loading is reduced, which can effectively extend the service life of the limit mechanism and reduce the maintenance and replacement frequency. Under the action of the impact force, through the enhanced stiffness and strength, the ability of the first limit plate 51 to withstand instantaneous loads without serious deformation is improved. At the same time, the reinforcing rib 10 can absorb and buffer the energy generated by the impact to a certain extent, reducing the impact on other components and ensuring the stability and safety of the limit mechanism.

[0039] In order to enhance the buffering effect of the symmetric platform shaking and make the load borne more evenly distributed on the limiting mechanism, in one embodiment, the outer peripheral surface of the third limiting plate 53 is arranged in cooperation with the vertical cross-sectional shape of the installation groove 7, and the outer peripheral surface of the third limiting plate 53 is in interference fit with the vertical cross-section of the installation groove 7. The shape cooperation ensures the position stability of the third limiting plate 53 in the installation groove 7. Due to the precise matching of its shape, the third limiting plate 53 is not easily displaced when subjected to an external force and can continuously maintain the correct working position, thereby improving the accuracy of the limiting mechanism; the shape cooperation reduces the free sliding space of the third limiting plate 53 in the installation groove 7. When the weighing platform 1 vibrates, the third limiting plate 53 will not generate excessive relative movement due to too much space, thereby enhancing the buffering effect of the symmetric platform shaking; due to the contact pressure generated by the interference fit, it can disperse the external impact force to a certain extent, making the load borne more evenly distributed on the limiting mechanism, effectively reducing material fatigue and wear, and thus improving the service life of the limiting mechanism; when the vehicle drives into or starts, the impact force generated can be absorbed by the friction between the third limiting plate 53 and the installation groove 7, enhancing the response ability and buffering effect of the limiting mechanism to dynamic loads.

[0040] In order to ensure that the second limiting plate 52 always remains in the correct position during normal operation and improve the overall anti-vibration ability of the limiting mechanism, in one embodiment, the second limiting plate 52 is arranged in interference fit with the installation opening 8. Since the size of the second limiting plate 52 is greater than or equal to the inner diameter of the installation opening 8, when bearing the lateral pressure from the weighing platform 1, the second limiting plate 52 is not easily displaced or separated from its original position, ensuring that it always remains in the correct position during normal operation; the interference fit keeps the second limiting plate 52 in close contact with the installation opening 8, reducing the gap change caused by relative movement under vehicle vibration conditions, thereby improving the overall anti-vibration ability of the limiting mechanism; when the vehicle drives onto the weighing platform 1, the impact force of the vehicle will be applied to the second limiting plate 52 through the first limiting plate 51. Due to the interference fit, the second limiting plate 52 can help reduce the impact of this force, achieving a smoother load transfer and thus avoiding excessive pressure or impact on the sensor or the entire weighing platform 1.

[0041] In order to improve the shock absorption and buffering effects and enhance the self-recovery ability of the small ball 6, in one embodiment, the contact surface between the third limiting plate 53 and the small ball 6 is arranged as an arc surface. The arc surface design makes the contact area between the third limiting plate 53 and the small ball 6 relatively large, effectively dispersing the load and impact acting on the small ball 6, reducing local stress concentration, and prolonging the service life of the small ball 6; the arc-shaped contact surface can reduce the direct action of sudden forces when subjected to pressure or impact, thereby achieving shock absorption and buffering effects. Through the deformation of the arc, the force transmission process becomes smoother, reducing the impact on the stability of the limiting mechanism; since the contact surface is arc-shaped, the friction surface is relatively smooth, thus reducing the wear risk, improving the overall durability of the system, and reducing the maintenance and replacement frequency; due to the certain flexibility of the elastic small ball 6, it can quickly return to its original state after being subjected to impact or pressure, enhancing the self-recovery ability of the small ball 6.

[0042] In order to effectively alleviate the severe vibration generated by friction and reduce the wear and plastic deformation between the first limiting plate 51 and the weighing platform 1, in one embodiment, a rubber cushion layer 11 is provided on the end surface of the first limiting plate 51 close to the weighing platform 1. When the weighbridge is working normally, the weighing platform 1 may generate vibrations and impacts due to the entry or departure of vehicles. These impact forces are transmitted from the weighing platform 1 to the first limiting plate 51, and the elastic characteristics of the rubber cushion layer 11 enable it to effectively absorb these impacts, reducing the direct impact on other components and protecting the overall structure of the limiting mechanism; during the contact and friction between the first limiting plate 51 and the weighing platform 1, the rubber cushion layer 11 can provide a certain amount of friction, thereby making the sliding resistance of the contact surface smaller, reducing wear, and effectively alleviating the severe vibration generated by friction; due to the elasticity and flexibility of the rubber cushion layer 11, it can bear a certain amount of compression and deformation, thereby reducing the wear and plastic deformation between the first limiting plate 51 and the weighing platform 1 and prolonging the service life of related components.

[0043] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A limiting mechanism for an electric rail weighbridge. The weighbridge includes a weighing platform (1) and load cells (2). The weighing platform (1) and load cells (2) are installed in a foundation (3). The limiting mechanism is arranged between the gap of the weighing platform (1) and the foundation (3), and is characterized in that: It includes a spring assembly (4), a limit assembly (5) and an elastic ball (6). An installation groove (7) is horizontally recessed on the inner wall of the base (3). An installation opening (8) is formed on the end face of the installation groove (7) close to the weighing platform (1). The limit assembly (5) is arranged in an I shape. The limit assembly (5) includes a first limit plate (51), a second limit plate (52) and a third limit plate (53). The second limit plate (52) penetrates through the installation opening (8) and can horizontally slide along the installation groove (7). The first limit plate (51) and the third limit plate (53) are respectively installed at both ends of the second limit plate (52). The spring assembly (4) includes several groups of springs. The two ends of the springs are respectively abutted against the first limit plate (51) and the outer wall of the installation groove (7). The ball (6) is clamped between the installation groove (7) and the third limit plate (53).

2. The limit mechanism of an electric rail weighbridge according to claim 1, characterized in that: Two groups of reverse rods (9) are horizontally arranged on the end face of the installation groove (7) far away from the installation opening (8). The reverse rods (9) are arranged on both sides of the ball (6) and are arranged parallel to the movement direction of the second limit plate (52). The length of the reverse rod (9) is less than the diameter of the ball (6).

3. The limit mechanism of an electric rail weighbridge according to claim 2, characterized in that: The reverse rod (9) is set as a cylinder, and the telescopic end of the cylinder is fixed to one end face of the third limit plate (53).

4. The limit mechanism of an electric rail weighbridge according to claim 1, characterized in that: A reinforcing rib (10) is arranged between the first limit plate (51) and the second limit plate (52).

5. The limit mechanism of an electric rail truck scale according to claim 1, characterized in that: The outer peripheral surface of the third limit plate (53) is arranged in cooperation with the vertical cross-section shape of the installation groove (7), and the outer peripheral surface of the third limit plate (53) is in interference fit with the vertical cross-section of the installation groove (7).

6. The limit mechanism of an electric rail weighbridge according to claim 5, characterized in that: The second limit plate (52) is in interference fit with the installation opening (8).

7. The limit mechanism of an electric rail weighbridge according to claim 6, characterized in that: The contact surface between the third limit plate (53) and the ball (6) is arranged as an arc surface.

8. The limit mechanism of an electric rail weighbridge according to claim 7, characterized in that: A rubber cushion layer (11) is arranged on the end face of the first limit plate (51) close to the weighing platform (1).

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