A safety guard, system, and method for a grader

Abstract

This invention discloses a safety protection device, system, and method for a grader, belonging to the field of mechanical engineering technology. The device includes: a protective shell installed on the front or rear platform of the grader, and a fixed rod connected to the protective shell. The upper end of the fixed rod has an upper support lug and a lower support lug; a rotating rod and a handrail installed on one side of the rotating rod. The upper end of the rotating rod opposite to the handrail has an upper support lug, and the lower end of the rotating rod opposite to the handrail has a lower support lug. The upper support lug is inserted between the upper and lower support lugs of the fixed rod and is rotatably connected to them via a pin. A drive mechanism is installed inside the protective shell, and the output shaft of the drive mechanism is connected to the lower support lug of the rotating rod, used to drive the protective mechanism to rotate between the deployed and retracted positions. This invention can achieve fully automatic safety protection for the grader and avoid interference between the protective device and other equipment.

Description

Technical Field

[0001] This invention belongs to the field of mechanical engineering technology and relates to a safety protection device, system and method for a grader. Background Technology

[0002] Existing construction machinery, such as graders, has a hinged connection between the front and rear frames, with front and rear platforms on the frames respectively. Since the platforms are located on the front and rear frames respectively, there is relative rotation between them, which requires space for mutual rotation at the transition position. In actual application, there is an area on the side of the front and rear platforms that is unprotected, which poses a certain risk. Due to the negligence of the workers on the platform, it may cause personal injury or death.

[0003] Although existing technologies can add manually opening and closing protective components to the edge of the platform, simply building a protective pole or net relies on manual operation, which is prone to damage due to forgetfulness or delay.

[0004] CN121110764A discloses an automatic opening and closing protective device and method. It uses a drive mechanism to convert linear power into a force that rotates the door connecting frame relative to the support mechanism, ultimately causing the handrail to open or close towards the protective railing on the front platform. However, its rotation angle is only 90°. At this angle, during the grader's movement, the protective railing is prone to relative interference with other structures, leading to equipment damage, affecting the flexibility of platform rotation, and it cannot achieve fully automatic opening and retraction of the protective device. Summary of the Invention

[0005] The purpose of this invention is to provide a safety protection device, system and method for graders, in order to solve the problems that existing protection devices require manual intervention during protection and that the protection devices may interfere with other equipment.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] In a first aspect, the present invention provides a safety protection device for a grader, comprising a support mechanism, a protective mechanism, and a drive mechanism;

[0008] The support mechanism includes: a protective shell installed on the rear platform of the grader and a fixing rod connected to the protective shell, the upper end of the fixing rod being provided with an upper fixing rod lug and a lower fixing rod lug;

[0009] The protective mechanism includes: a rotating rod and a handrail installed on one side of the rotating rod. The upper end of the rotating rod opposite to the handrail is provided with an upper rotating rod lug, and the lower end of the rotating rod opposite to the handrail is provided with a lower rotating rod lug. The upper rotating rod lug is inserted between the upper and lower fixed rod lugs and is rotatably connected to the upper and lower fixed rod lugs via a pin.

[0010] The drive mechanism is installed inside the protective housing. The output shaft of the drive mechanism is connected to the lower support lug of the rotating rod, and is used to drive the protective mechanism to rotate between the unfolded position and the retracted position.

[0011] A limiting plate is provided on the lower side of the lower support lug of the fixed rod. The limiting plate is symmetrical about the lower support lug of the fixed rod. The length of the limiting plate is more than twice the length of the upper support lug of the rotating rod. The limiting plate is used to limit the rotation angle of the protective mechanism.

[0012] The limiting plate includes a first limiting plate and a second limiting plate. When the protective mechanism coincides with the position of the first limiting plate, the protective mechanism is in the retracted position. When the protective mechanism coincides with the position of the second limiting plate, the protective mechanism is in the deployed position.

[0013] The drive mechanism includes a geared motor, the output shaft of which is arranged vertically downwards.

[0014] The protective shell has a cable guide plate on its side, and the drive mechanism is connected to an external control module via a cable.

[0015] The rotating rod is equipped with a handrail fixing plate that is symmetrical about the rotating rod. The two ends of the handrail fixing plate are provided with a first opening. The two ends of the limiting plate are provided with a second opening that matches the first opening. When the protective mechanism rotates to the retracted position or the unfolded position, the first opening on one side and the second opening on the same side coincide exactly. At this time, the first opening and the second opening are connected by a limiting pin.

[0016] The handrail can be rectangular, U-shaped, or Z-shaped.

[0017] Secondly, the present invention provides a safety protection system for a grader, including a control module, a sensing module, and the safety protection device for the grader;

[0018] The sensing module is used to acquire the status information of the grader's engine and the working information of the drive mechanism. The control module is used to determine the start-stop status of the grader and the position status of the protective mechanism based on the information from the sensing module, and to control the operation of the drive mechanism based on the start-stop status and position status.

[0019] Thirdly, the present invention provides a safety protection method for a grader, based on the aforementioned safety protection system for a grader, comprising the following steps:

[0020] When the sensor signal for engine start is received, the control module controls the drive mechanism to reverse, and the drive mechanism drives the protective mechanism to rotate toward the retraction position. When the protective mechanism reaches the retraction position, the control module controls the drive mechanism to stop working.

[0021] Upon receiving a sensor signal indicating engine shutdown, the control module controls the drive motor to rotate forward, causing the drive mechanism to rotate the protective mechanism towards the unfolded position. Once the protective mechanism reaches the unfolded position, the control module controls the drive motor to stop working.

[0022] Beneficial effects

[0023] This invention provides a dynamic solution for the safety protection of graders. The protective device is simple and reasonable in design, highly practical, easy to maintain, and safe and reliable. By acquiring the engine status, the protective device can be controlled to rotate automatically, unfold into a continuous protective channel to provide safety protection for workers between the front and rear platforms, or retract to avoid collision damage caused by the grader's rotation or rear axle swing. The entire process requires no manual operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the safety protection device for a grader according to the present invention;

[0025] Figure 2 This is a schematic diagram of the protective mechanism of the safety protection device for a grader according to the present invention;

[0026] Figure 3 This is a schematic diagram of the support mechanism for the safety protection device of the grader according to the present invention;

[0027] Figure 4 This is a schematic diagram of the safety protection device for a grader of the present invention in the deployed position.

[0028] Figure 5 This is a schematic diagram of the safety protection device for a grader of the present invention in the retraction position.

[0029] In the diagram, 1 is the protective mechanism; 2 is the limiting pin; 3 is the pin shaft; 4 is the limiting plate; 5 is the support mechanism; 6 is the drive mechanism; 7 is the protective shell; 1-1 is the upper support lug of the rotating rod; 1-2 is the lower support lug of the rotating rod; 1-3 is the fixing plate; 1-4 is the handrail; 1-5 is the rotating rod; 5-1 is the upper support lug of the fixing rod; 5-2 is the lower support lug of the fixing rod; 5-3 is the fixing rod; A is the front platform; B is the rear platform. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] refer to Figures 1 to 5 As shown, a safety protection device for a grader includes a support mechanism 5, a protection mechanism 1, and a drive mechanism 6.

[0033] The support mechanism 5 includes: a protective shell 7 installed on the rear platform B of the grader and a fixing rod 5-3 connected to the protective shell 7. The upper end of the fixing rod 5-3 is provided with an upper fixing rod lug 5-1 and a lower fixing rod lug 5-2.

[0034] The protective mechanism 1 includes: a rotating rod 1-5 and a handrail 1-4 installed on one side of the rotating rod 1-5. The upper end of the rotating rod 1-5 on the opposite side of the handrail 1-4 is provided with an upper rotating rod lug 1-1, and the lower end of the rotating rod 1-5 on the opposite side of the handrail 1-4 is provided with a lower rotating rod lug 1-2. The upper rotating rod lug 1-1 is inserted between the upper fixed rod lug 5-1 and the lower fixed rod lug 5-2, and is rotatably connected to the upper fixed rod lug 5-1 and the lower fixed rod lug 5-2 through a pin 3.

[0035] The drive mechanism 6 is installed inside the protective shell 7. The output shaft of the drive mechanism 6 is connected to the lower support lug 1-2 of the rotating rod, which is used to drive the protective mechanism 1 to rotate between the unfolded position and the retracted position.

[0036] In this embodiment, the recovery position is located on the side of the rear platform, and the deployment position is located between the front and rear platforms and perpendicular to the edges of the front and rear platforms.

[0037] In this embodiment, a limiting plate 4 is provided on the lower side of the lower support lug 5-2 of the fixed rod. The limiting plate 4 is symmetrical about the lower support lug 5-2 of the fixed rod. The length of the limiting plate 4 is more than twice the length of the upper support lug 1-1 of the rotating rod. The limiting plate 4 is used to limit the rotation angle of the protective mechanism 1. The protective mechanism 1 always rotates on one side of the limiting plate 4.

[0038] In one possible implementation, the limiting plate 4 includes a first limiting plate and a second limiting plate. When the protective mechanism 1 coincides with the position of the first limiting plate, the protective mechanism 1 is in the retracted position. When the protective mechanism 1 coincides with the position of the second limiting plate, the protective mechanism 1 is in the deployed position. The included angle between the first limiting plate and the second limiting plate is equal to the rotation angle of the protective mechanism 1. The specific positions of the first limiting plate and the second limiting plate can be flexibly adjusted as needed.

[0039] The drive mechanism 6 includes a geared motor, the output shaft of which is arranged vertically downward to prevent water from entering the motor and protect it; an oil seal frame is provided at the output shaft of the geared motor.

[0040] The protective housing 7 is a sealed design to prevent water and dust from entering the geared motor and affecting its use; the protective housing 7 has a cable guide plate on its side, and the geared motor is connected to the external control module through a cable, which passes through the sealed joint of the cable guide plate.

[0041] The rotating rod is provided with symmetrical handrail fixing plates 1-3. The two ends of the handrail fixing plates 1-3 are provided with first openings, and the two ends of the limiting plate 4 are provided with second openings that cooperate with the first openings. When the protective mechanism 1 rotates to the retracted position or the extended position, the first opening on one side and the second opening on the same side coincide exactly. At this time, the first opening and the second opening are connected by the limiting pin 2 to fix the position of the protective mechanism 1 and prevent it from shaking and colliding with other equipment.

[0042] The shape of the handrails 1-4 is not limited to rectangle, U-shape or Z-shape. They can be flexibly changed according to the gripping habits of the workers or the needs of groups with different heights. The U-shape can avoid the risk of people getting caught or bumping into each other due to sharp edges or complex structures.

[0043] Example 2

[0044] A safety protection system for a grader includes a control module, a sensing module, and the safety protection device described in Embodiment 1. The sensing module is used to acquire the status information of the grader's engine and the working information of the geared motor. The control module is used to determine the start / stop status of the grader and the position status of the protection mechanism based on the information from the sensing module, and to control the operation of the drive mechanism based on the start / stop status and the position status.

[0045] The control module communicates with the sensing module, and the control module is connected to the geared motor via a cable.

[0046] Example 3

[0047] A safety protection method for a grader includes the following steps: In the initial state, the grader engine is off and in a stopped state, the protective mechanism is in the deployed position, and the limit pin is down to prevent the protective mechanism from rotating accidentally, forming a continuous protective channel between the front and rear platforms; when a sensor signal indicating engine start is received, the limit pin retracts, the control module controls the geared motor to reverse, the geared motor drives the protective mechanism to rotate 180° to the retracted position, the geared motor stops working, and the limit pin falls; when the engine is off, the limit pin retracts, the control module controls the geared motor to rotate forward, the geared motor drives the protective mechanism to rotate 180° to the deployed position, the geared motor stops working, and the limit pin falls.

[0048] In summary, this invention provides a dynamic solution for the safety protection of graders. The protective device is simple and reasonable in design, highly practical, easy to maintain, and safe and reliable. By acquiring the engine status, the protective device can be controlled to rotate automatically, unfold into a continuous protective channel to provide safety protection for workers between the front and rear platforms, or retract to avoid collisions that could damage the device due to the rotation of the grader or the swing of the rear axle. The entire process requires no manual operation.

[0049] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A safety protection device for a grader, characterized in that, Includes support mechanisms, protective mechanisms, and drive mechanisms; The support mechanism includes: a protective shell installed on the rear platform of the grader and a fixing rod connected to the protective shell, the upper end of the fixing rod being provided with an upper fixing rod lug and a lower fixing rod lug; The protective mechanism includes: a rotating rod and a handrail installed on one side of the rotating rod. The upper end of the rotating rod opposite to the handrail is provided with an upper rotating rod lug, and the lower end of the rotating rod opposite to the handrail is provided with a lower rotating rod lug. The upper rotating rod lug is inserted between the upper and lower fixed rod lugs and is rotatably connected to the upper and lower fixed rod lugs via a pin. The drive mechanism is installed inside the protective housing. The output shaft of the drive mechanism is connected to the lower support lug of the rotating rod, and is used to drive the protective mechanism to rotate between the unfolded position and the retracted position.

2. The safety protection device for a grader according to claim 1, characterized in that, A limiting plate is provided on the lower side of the lower support lug of the fixed rod. The limiting plate is symmetrical about the lower support lug of the fixed rod. The length of the limiting plate is more than twice the length of the upper support lug of the rotating rod. The limiting plate is used to limit the rotation angle of the protective mechanism.

3. The safety protection device for a grader according to claim 2, characterized in that, The limiting plate includes a first limiting plate and a second limiting plate. When the protective mechanism coincides with the position of the first limiting plate, the protective mechanism is in the retracted position. When the protective mechanism coincides with the position of the second limiting plate, the protective mechanism is in the deployed position.

4. The safety protection device for a grader according to claim 1, characterized in that, The drive mechanism includes a geared motor, the output shaft of which is arranged vertically downwards.

5. The safety protection device for a grader according to claim 1, characterized in that, The protective shell has a cable guide plate on its side, and the drive mechanism is connected to an external control module via a cable.

6. The safety protection device for a grader according to claim 2 or 3, characterized in that, The rotating rod is equipped with a handrail fixing plate that is symmetrical about the rotating rod. The two ends of the handrail fixing plate are provided with a first opening. The two ends of the limiting plate are provided with a second opening that matches the first opening. When the protective mechanism rotates to the retracted position or the unfolded position, the first opening on one side and the second opening on the same side coincide exactly. At this time, the first opening and the second opening are connected by a limiting pin.

7. The safety protection device for a grader according to claim 1, characterized in that, The handrail can be rectangular, U-shaped, or Z-shaped.

8. A safety protection system for a grader, characterized in that, Includes a control module, a sensing module, and a safety protection device for a grader as described in any one of claims 1 to 7; The sensing module is used to acquire the status information of the grader's engine and the working information of the drive mechanism. The control module is used to determine the start-stop status of the grader and the position status of the protective mechanism based on the information from the sensing module, and to control the operation of the drive mechanism based on the start-stop status and position status.

9. A safety protection method for a grader, characterized in that, The safety protection system for a grader according to claim 8 includes the following steps: When the sensor signal for engine start is received, the control module controls the drive mechanism to reverse, and the drive mechanism drives the protective mechanism to rotate toward the retraction position. When the protective mechanism reaches the retraction position, the control module controls the drive mechanism to stop working. Upon receiving a sensor signal indicating engine shutdown, the control module controls the drive motor to rotate forward, causing the drive mechanism to rotate the protective mechanism towards the unfolded position. Once the protective mechanism reaches the unfolded position, the control module controls the drive motor to stop working.

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