Operating vehicle platform limiting mechanism

Abstract

The utility model discloses an operating vehicle platform limit mechanism, relates to operating vehicle platform technical field, including rotating plate and bottom plate, the both sides of bottom plate top are fixedly connected with the support rod, in the operating vehicle platform rotation process, the rotating plate is connected with the operating platform, along with the platform rotation drive the rotating column and the gear to rotate, the support rod is connected with the support rod. The gear and the rack interact to push the rack to move along the track, when the rack makes contact with the sensor, a signal is triggered, automatic power off is conducted to stop rotation of the platform, equipment damage or safety accidents caused by excessive rotation are avoided, meanwhile, the rotating plate drives the limiting plate to rotate, the limiting plate approaches the limiting rod and the limiting stopper, finally collision is conducted, and rotation is limited. The rotating angle of the working platform does not exceed the safety range, double limiting protection is achieved through the synergistic effect of a sensor, a limiting rod and a limiter, safety and stability in the rotating process of the platform are guaranteed, and potential safety hazards caused by faults of a single assembly are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of work vehicle platforms, in particular to a work vehicle platform limiting mechanism. Background Art

[0002] An engineering work platform is a work platform mounted on a specialized vehicle, primarily used for operations at specific heights or locations. For platforms with a rotating function, a limiter mechanism can restrict the rotation angle. This prevents excessive platform rotation from causing excessive twisting, entanglement, or even rupture of connecting lines (such as hydraulic hoses and cables), which could affect the platform's normal operation. It also ensures that operators work within a suitable angle range, preventing excessive rotation from exceeding the safe operating area.

[0003] However, in the existing technology, when the work vehicle platform frequently approaches or reaches the rotation limit angle, the contact frequency between the rotating parts (such as rotating shafts, bearings, etc.) and the limit device will increase, and a large impact force will be generated between the limit block and the rotating structure, which will accelerate the wear of the rotating parts. If this continues for a long time, the wear of the rotating shaft will be aggravated, and the pipelines connecting the platform (such as hydraulic oil pipes, cables, etc.) will be excessively twisted or even broken. Once the hydraulic oil pipe breaks, the leakage of hydraulic oil will cause a fire hazard. Utility Model Content

[0004] The purpose of the utility model is to solve the problem in the prior art that a large impact force is generated between the limit block and the rotating structure, which accelerates the wear of the rotating parts and causes increased wear of the rotating shaft in the long term, and to propose a work vehicle platform limit mechanism.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a work vehicle platform limiting mechanism, comprising a rotating plate and a bottom plate, both sides of the top of the bottom plate are fixedly connected to support rods, a first limiting assembly is installed on the top of the support rod, a second limiting assembly is installed below the rotating plate, and a rotating column is fixedly connected to the center of the bottom of the rotating plate;

[0006] The first limiting assembly includes a rack, one side of the rack is meshed with a gear, the gear is fixedly connected to the outer surface of the rotating column, one side of the rack is fixedly connected to a first track, the outer surface of the first track is slidably connected to a limiting frame, and one side of the limiting frame is fixedly connected to a fixing frame;

[0007] The second limiting assembly includes a support plate, two second mounting brackets are fixedly connected to the top of the support plate, one side of the second mounting bracket is threadedly connected to a limiting rod, and a limiter is provided on the other side of the second mounting bracket, a limiting plate is provided on one side of the limiting rod, and the top of the limiting plate is fixedly connected to the bottom of the rotating plate.

[0008] Preferably, a sliding groove is provided at the bottom of the rotating plate, and two second rails are symmetrically fixedly connected to the top of the supporting plate.

[0009] Preferably, the second track is slidably connected to the slide groove, and a plurality of support frames are fixedly connected to the top of the support plate.

[0010] Preferably, a support wheel is rotatably connected to the inner side of the support frame, and the top of the support wheel abuts against the bottom of the rotating plate.

[0011] Preferably, a first mounting bracket is fixedly connected to one side of the bottom of the support plate, and a first cylinder is installed on one side of the first mounting bracket.

[0012] Preferably, a sensor is installed on one side of the first cylinder, and the top of the fixing bracket is fixedly connected to the bottom of the support plate.

[0013] Preferably, a second cylinder is fixedly mounted on one side of the second mounting bracket, and an output end of the second cylinder is fixedly connected to a limiter.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are:

[0015] 1. In the utility model, during the rotation of the work vehicle platform, the rotating plate is connected to the work platform, and the rotating column and the gear are driven to rotate as the platform rotates. The gear and the rack interact with each other to push the rack to move along the track. When the rack contacts the sensor, a signal is triggered, and the power is automatically cut off to stop the platform rotation, avoiding excessive rotation causing equipment damage or safety accidents. At the same time, the rotating plate drives the limit plate to rotate, and the limit plate approaches the limit rod and the limiter, and finally collides and limits the rotation, ensuring that the rotation angle of the work platform does not exceed the safe range. Through the coordinated action of the sensor, the limit rod and the limiter, double limit protection is achieved to ensure the safety and stability of the platform during rotation, and avoid safety hazards caused by failure of a single component.

[0016] 2. In the present invention, the necessary support is provided by the relative sliding between the bottom slide groove and the second track during the rotation of the rotating plate, thereby avoiding the skew problem caused by external force or unbalanced load and ensuring the stability of the rotating plate. At the same time, the support wheel cooperates with the gear system to ensure the smooth rotation of the rotating plate through precise meshing, avoiding deviation or jamming. The sliding of the rack drives the movement of the first track. The limit frame ensures that the track remains horizontal during the sliding process through precise limiting design, thereby ensuring the stability and accuracy of the system. The first cylinder accurately adjusts the position of the sensor to ensure that it accurately senses the movement state of the rotating plate, and the feedback system real-time information supports automatic control; the second cylinder adjusts the position of the limiter, and cooperates with the limit rod and the mounting frame to accurately adjust the maximum rotation angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a platform limiting mechanism for a work vehicle proposed in the utility model;

[0018] Figure 2 This is a schematic diagram of the three-dimensional structure of a second limiting component of a limiting mechanism for a work vehicle platform proposed in the utility model;

[0019] Figure 3 This is a partial three-dimensional structural diagram of a platform limiting mechanism for a work vehicle proposed in the utility model;

[0020] Figure 4 The utility model provides a schematic diagram of the disassembled three-dimensional structure of the first limiting component of the limiting mechanism of the work vehicle platform.

[0021] Legend: 1. Rotating plate; 11. Slide; 12. Rotating column; 13. Limiting plate; 2. Bottom plate; 21. Support rod; 3. First limiting assembly; 31. First cylinder; 311. Sensor; 32. First mounting bracket; 33. Rack; 34. Gear; 35. First track; 36. Fixed bracket; 37. Limiting bracket; 4. Second limiting assembly; 41. Support plate; 42. Second track; 43. Support bracket; 44. Support wheel; 45. Second mounting bracket; 46. Limiting rod; 47. Limiter; 48. Second cylinder. DETAILED DESCRIPTION

[0022] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Example 1: Figure 1-4 As shown, the utility model provides a platform limit mechanism for a work vehicle, comprising a rotating plate 1 and a base plate 2. Support rods 21 are fixedly connected to both sides of the top of the base plate 2. A first limit assembly 3 is installed on the top of the support rod 21. A second limit assembly 4 is installed below the rotating plate 1. A rotating column 12 is fixedly connected to the center of the bottom of the rotating plate 1.

[0025] The first limiting assembly 3 includes a rack 33, one side of which is meshedly connected to a gear 34, which is fixedly connected to the outer surface of the rotating column 12. One side of the rack 33 is fixedly connected to a first rail 35, and the outer surface of the first rail 35 is slidably connected to a limiting frame 37, and one side of the limiting frame 37 is fixedly connected to a fixing frame 36;

[0026] The second limiting assembly 4 includes a support plate 41, and two second mounting brackets 45 are fixedly connected to the top of the support plate 41. A limiting rod 46 is threadedly connected to one side of the second mounting bracket 45, and a limiter 47 is provided on the other side of the second mounting bracket 45. A limiting plate 13 is provided on one side of the limiting rod 46, and the top of the limiting plate 13 is fixedly connected to the bottom of the rotating plate 1.

[0027] The following details the specific configuration and function of this embodiment. During the rotation of the work platform, rotating plate 1 is securely connected to the work platform. When the work platform begins to rotate, rotating plate 1 also rotates. This rotation not only rotates rotating plate 1 itself but also drives the connected rotating column 12. As rotating column 12 rotates, the gear 34 mounted on it also begins to rotate. At this point, the gear 34 interacts with the rack 33, exerting a force on it, causing the rack 33 to begin moving along its trajectory.

[0028] The movement of rack 33 gradually brings it closer to sensor 311. When one end of rack 33 contacts sensor 311, a signal is triggered, indicating that the work platform has reached its maximum rotation angle. At this point, the rotation drive system automatically powers off, stopping the work platform's rotation. This prevents further rotation and prevents equipment damage or safety accidents caused by excessive rotation.

[0029] At the same time, the rotation of the rotating plate 1 also drives the limit plate 13 to rotate together. The connection between the limit plate 13 and the rotating plate 1 allows the limit plate 13 to gradually approach the set limit rod 46 during the rotation process. As the rotation continues, the limit plate 13 will eventually collide with the limit rod 46 and the limiter 47, thereby achieving a second limit on the rotation of the work platform, ensuring that the work platform will not continue to rotate beyond the set safety angle. The synergistic effect of the limit rod 46, the limiter 47 and the sensor 311 forms a double limit protection. When any component fails or malfunctions, the other components can still continue to function to ensure that the rotation of the work platform stops.

[0030] Example 2: Figure 1 and Figure 2As shown, a slide groove 11 is provided at the bottom of the rotating plate 1, and two second rails 42 are symmetrically fixedly connected to the top of the support plate 41. The second rails 42 are slidably connected to the slide groove 11, and a plurality of support frames 43 are fixedly connected to the top of the support plate 41. A support wheel 44 is rotatably connected to the inner side of the support frame 43, and the top of the support wheel 44 abuts against the bottom of the rotating plate 1. A first mounting frame 32 is fixedly connected to one side of the bottom of the support plate 41, and a first cylinder 31 is installed on one side of the first mounting frame 32. A sensor 311 is installed on one side of the first cylinder 31, and the top of the fixing frame 36 is fixedly connected to the bottom of the support plate 41. A second cylinder 48 is fixedly installed on one side of the second mounting frame 45, and the output end of the second cylinder 48 is fixedly connected to the limiter 47.

[0031] The entire embodiment achieves the crucial effect of sliding between the bottom chute 11 and the second track 42 during the rotation of the rotating plate 1. This sliding not only provides necessary support but also effectively prevents the rotating plate 1 from tilting due to external forces or unbalanced loads. The stability of the rotating plate 1 is further ensured because during rotation, the bottom support wheel 44 cooperates with the gear system 34. Through precise meshing of the gears 34, the rotating plate 1 can rotate smoothly and accurately, avoiding any possible deviation or jamming.

[0032] Furthermore, as rack 33 slides, its movement not only drives the movement of first rail 35 but also prompts the first rail 35 to move under the guidance of stopper 37. The stopper 37, through its precise positioning design, ensures that the first rail 35 remains horizontal during the sliding process, preventing the rail from tilting due to gravity or other forces, thereby ensuring stability and accuracy throughout the entire movement process. This positioning structure provides an important stability guarantee for the coordinated movement of rack 33 and the rail system.

[0033] To further enhance the flexibility and adjustability of the system, the coordination between the first cylinder 31 and the second cylinder 48 plays a crucial role. The first cylinder 31 can precisely adjust the position of the sensor 311, ensuring that the sensor 311 can always accurately sense the motion state of the rotating plate 1, providing real-time feedback to the system and supporting automated control. The second cylinder 48 is used to change the position of the limiter 47, and cooperates with the limit rod 46 and the second mounting bracket 45 through a threaded connection to achieve precise adjustment of the maximum rotation angle of the rotating plate 1. In this way, users can flexibly set the rotation angle according to actual needs, meet operational requirements under different working conditions, and further enhance the adaptability and stability of the system.

[0034] The device's usage and operating principle: After the rotating plate 1 is connected to the work vehicle platform, when the work platform rotates, the rotating plate 1 also rotates, driving the rotating column 12 with it. As the rotating column 12 rotates, the gear 34 also rotates, exerting force on the rack 33, causing it to begin moving. When the rack 33 approaches the sensor 311 and contacts one end with it, reaching its maximum rotation angle, the work platform's rotation drive is disconnected, and rotation stops.

[0035] Simultaneously, as the rotating plate 1 rotates, the limit plate 13 also moves, gradually approaching the limit rod 46. When the limit plate 13 collides with the limit rod 46 and the stopper 47, it acts as a limiter, halting the rotation of the work platform. The coordinated action of the limit rod 46, the stopper 47, and the sensor 311 achieves a dual limit function, ensuring the safety of the work platform when stopped. If one limiter component is damaged, the other components can still function as a limiter, allowing for prompt detection and repair.

[0036] During the rotation of the rotating plate 1, the bottom chute 11 slides relative to the second track 42, providing support and preventing the rotating plate 1 from tilting. Furthermore, the gear 34 of the support wheel 44 helps maintain the normal rotation of the rotating plate 1. The sliding of the rack 33 drives the movement of the first track 35, which, constrained by the position of the stop frame 37, ensures that the movement of the rack 33 remains horizontal and prevents tilting.

[0037] In addition, the first cylinder 31 can adjust the position of the sensor 311, and the second cylinder 48 can adjust the position of the limiter 47. Combined with the threaded connection between the limit rod 46 and the second mounting bracket 45, the maximum angle of rotation can be changed.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A work vehicle platform limiting mechanism, comprising a rotating plate (1) and a bottom plate (2), wherein both sides of the top of the bottom plate (2) are fixedly connected to support rods (21), characterized in that: A first limiting assembly (3) is installed on the top of the support rod (21), a second limiting assembly (4) is installed below the rotating plate (1), and a rotating column (12) is fixedly connected to the center of the bottom of the rotating plate (1); The first limiting assembly (3) includes a rack (33), one side of the rack (33) is meshedly connected to a gear (34), the gear (34) is fixedly connected to the outer surface of the rotating column (12), one side of the rack (33) is fixedly connected to a first track (35), the outer surface of the first track (35) is slidably connected to a limiting frame (37), and one side of the limiting frame (37) is fixedly connected to a fixing frame (36); The second limiting assembly (4) comprises a support plate (41), the top of the support plate (41) is fixedly connected to two second mounting frames (45), one side of the second mounting frame (45) is threadedly connected to a limiting rod (46), and the other side of the second mounting frame (45) is provided with a limiter (47), one side of the limiting rod (46) is provided with a limiting plate (13), and the top of the limiting plate (13) is fixedly connected to the bottom of the rotating plate (1).

2. A work vehicle platform limiting mechanism according to claim 1, characterized in that: A sliding groove (11) is provided at the bottom of the rotating plate (1), and two second rails (42) are symmetrically fixedly connected to the top of the supporting plate (41).

3. The platform limiting mechanism of a work vehicle according to claim 2, characterized in that: The second track (42) is slidably connected to the slide groove (11), and a plurality of support frames (43) are fixedly connected to the top of the support plate (41).

4. The platform limiting mechanism of a work vehicle according to claim 3, characterized in that: The inner side of the support frame (43) is rotatably connected to a support wheel (44), and the top of the support wheel (44) abuts against the bottom of the rotating plate (1).

5. The platform limiting mechanism of a work vehicle according to claim 1, characterized in that: A first mounting frame (32) is fixedly connected to one side of the bottom of the support plate (41), and a first cylinder (31) is mounted on one side of the first mounting frame (32).

6. The platform limiting mechanism of a work vehicle according to claim 5, characterized in that: A sensor (311) is installed on one side of the first cylinder (31), and the top of the fixing frame (36) is fixedly connected to the bottom of the support plate (41).

7. The platform limiting mechanism for a work vehicle according to claim 1, characterized in that: A second cylinder (48) is fixedly mounted on one side of the second mounting frame (45), and an output end of the second cylinder (48) is fixedly connected to a limiter (47).

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