A limiting transmission structure, a transmission movement device and a barrier gate equipment

Abstract

The utility model discloses bar gate technical field relates to a kind of limiting transmission structure, transmission movement core device and bar gate equipment, the limiting transmission structure includes turbine shaft piece, curved arm transmission piece and the limiting piece being arranged between turbine shaft piece and curved arm transmission piece;Turbine shaft piece one end is used to be connected with driving motor, the other end is fixedly connected with limiting piece, to make limiting piece swing around the axis of turbine shaft piece, the swing plane of limiting piece is perpendicular to the axis of turbine shaft piece;Curved arm transmission piece one end is used to be connected with gate lever assembly, the other end is transmission connection with the end of limiting piece away from turbine shaft piece, to make curved arm transmission piece rotate on swing plane with the swing of limiting piece;Wherein, when gate lever assembly is close to turbine shaft piece, curved arm transmission piece is in falling state;When gate lever assembly is away from turbine shaft piece, curved arm transmission piece is in rising state.The utility model embodiment discards mechanical limiting, and realizes limiting by using the linkage of self component in limiting transmission structure in limit position.

Description

Technical Field

[0001] This utility model relates to the field of barrier gate equipment technology, specifically to a limit transmission structure, a transmission core device, and barrier gate equipment. Background Technology

[0002] A barrier gate, widely used in parking lots, residential areas, toll stations, and other access control devices, controls vehicle passage by raising and lowering the gate arm. The gate arm's movement is typically achieved by a motor-driven transmission mechanism. This mechanism controls the gate arm's movement between two extreme positions: vertical (raised) and horizontal (lowered). To ensure the gate arm stops at these extreme positions, a combination of electronic sensors (such as Hall effect sensors or photoelectric encoders) and mechanical limit switches is used. Mechanical limit switches are usually implemented by adding an independent blocking structure (such as a limit screw or stop block) along the transmission mechanism's movement path. When the transmission mechanism reaches its extreme position, a component collides with this additional blocking structure, forcing it to stop.

[0003] While external additional limiters are effective, they increase the number of extra parts, raising manufacturing costs and assembly complexity. Secondly, independent blocking structures require precise installation and adjustment, and may be prone to loosening, wear, or displacement under long-term, high-impact collisions with moving parts, affecting the reliability of the limiters. Summary of the Invention

[0004] In view of the above problems, this utility model provides a limit transmission structure, a transmission mechanism, and a barrier gate device to solve the problems of high cost and complex installation and debugging caused by the need to set up additional blocking structures to achieve mechanical limit in the prior art.

[0005] According to a first aspect of the present invention, a limiting transmission structure is provided, the limiting transmission structure comprising: a turbine shaft, a crank arm transmission component, and a limiting component disposed between the turbine shaft and the crank arm transmission component; One end of the turbine shaft is used to connect to the drive motor, and the other end is fixedly connected to the limiting member, so that the limiting member swings around the axis of the turbine shaft, and the swing plane of the limiting member is perpendicular to the axis of the turbine shaft. One end of the crank arm drive is used to connect to the brake arm assembly, and the other end is driven to the end of the limiting member away from the turbine shaft, so that the crank arm drive rotates on the swing plane with the swing of the limiting member. When the brake arm assembly is close to the turbine shaft, the crank arm drive is in a lowered state; when the brake arm assembly is far from the turbine shaft, the crank arm drive is in a raised state.

[0006] In one alternative embodiment, the turbine shaft includes a first rotating shaft, one end of which is fixedly connected to the limiting member and extends partially through the limiting member and toward the crank arm transmission member to form a blocking portion. When the crank arm drive is in the lowered state, the blocking part is close to the middle section of the crank arm drive on the swing plane and abuts against the crank arm drive to restrict the rotation of the crank arm drive; when the crank arm drive is in the raised state, the blocking part is away from the end of the crank arm drive that is connected to the brake arm assembly.

[0007] In one alternative embodiment, the boom arm transmission includes a first arm and a second arm, the connection angle formed by the first arm and the second arm being less than 180 degrees. When the boom arm transmission is in the lowered state, the end portion of the turbine shaft away from the drive motor is placed within the connection angle. When the boom arm transmission is in the raised state, the turbine shaft is located outside the connection angle.

[0008] In one alternative approach, the length of the second arm is greater than the length of the first arm.

[0009] In one alternative embodiment, the limiting member includes a first end and a second end; the end of the turbine shaft member away from the drive motor is fixedly connected to the first end; the second end is drively connected to the end of the crank arm transmission member away from the brake arm assembly. The crank arm transmission component has a first connecting hole at one end away from the brake arm assembly, and a second rotating shaft at the second end, the axis of which is a second axis; the second rotating shaft is partially placed in the first connecting hole so that the crank arm transmission component can rotate relative to the second end around the second axis. The axis of the first rotating shaft of the turbine shaft is the first axis, and the axis of the second rotating shaft is the second axis. The first axis and the second axis are parallel.

[0010] In one alternative embodiment, the end of the crank arm drive member away from the second end is provided with a second connecting hole, and the gate arm assembly includes a third rotating shaft, and the third rotating shaft is partially placed in the second connecting hole, so that the crank arm drive member can rotate relative to the gate arm assembly about a third axis of the third rotating shaft; the third axis is parallel to the first axis.

[0011] In one alternative embodiment, the first end is provided with a first connecting part and a second connecting part, the first connecting part and the second connecting part are connected to each other at one end near the second end, and are arranged opposite each other at a distance from the other end; The opposite sides of the first connecting part and the second connecting part are recessed in a direction away from each other to form a first connecting channel. The end of the first rotating shaft away from the drive motor is placed through the first connecting channel and fixedly connected to the first end.

[0012] In one alternative embodiment, the first connecting portion and the second connecting portion are each provided with a second connecting channel, the axes of the two second connecting channels coincide, and the second connecting channel is disposed further away from the second end than the first connecting channel; the axis of the second connecting channel is perpendicular to the axis of the first connecting channel. A fastener passes through the two second connecting channels to bring the first connecting portion and the second connecting portion closer together, so as to clamp and fix the first rotating shaft located in the first connecting channel.

[0013] According to a second aspect of the present invention, a transmission mechanism is provided, the transmission mechanism comprising: a limiting transmission structure as described in any one of the first aspects, and the drive motor and the brake arm assembly connected to the limiting transmission structure.

[0014] According to another aspect of the present invention, a barrier gate device is provided, the barrier gate device including the transmission mechanism device provided in the second aspect.

[0015] The limiting transmission structure provided in this embodiment of the utility model abandons the traditional method of using externally added stops to achieve mechanical limiting. Instead, it achieves limiting by utilizing the linkage of its own components at extreme positions: In the lowering state, the limiting component and the gate arm assembly are rigidly connected to both ends of the crank arm transmission component, directly reacting the force that prevents movement onto the limiting component, thus preventing it from continuing to rotate and achieving the limiting effect; in the raising state, the gate arm assembly's tilting movement is constrained by the connection point between the crank arm transmission component and the limiting component, achieving limiting. This embodiment integrates the mechanical limiting function into the "system self-limiting" mechanism of the limiting transmission structure itself, eliminating all additional limiting parts, greatly simplifying the structure, reducing costs and assembly complexity, and fundamentally avoiding the problem of limiting inaccuracy caused by loosening or displacement of external stops.

[0016] Meanwhile, by fixing one end of the limiting component to the turbine shaft to obtain power, and rotating the other end to the crank arm drive component, the rotational motion of the turbine shaft is converted into a large-range swing of the crank arm drive component within the swing plane. This efficiently drives the gate arm in the gate arm assembly to complete a large-span raising and lowering motion. Simultaneously, the rotational connection between the crank arm drive component and the limiting component allows for small-range adaptive rotation of the crank arm drive component during transmission, effectively compensating for relative position changes between the gate arm assembly and the limiting component during movement. This ensures smooth and jam-free operation of the entire transmission chain under various conditions, improving the smoothness and reliability of the transmission.

[0017] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A schematic diagram of the limiting transmission structure provided in an embodiment of this utility model is shown; Figure 2 A schematic diagram of the limiting transmission structure provided in an embodiment of this utility model is shown; Figure 3 An exploded view of the limiting transmission structure provided in an embodiment of this utility model is shown; Figure 4 An exploded view of the limiting transmission structure provided in an embodiment of this utility model is shown; Figure 5 A schematic diagram of the transmission mechanism device provided in an embodiment of this utility model is shown; Figure 6 This diagram illustrates the connection structure between the limit transmission structure and the gate arm assembly when the gate arm of the transmission mechanism device provided in this embodiment of the present invention is in the descending state. Figure 7 This diagram illustrates the connection structure between the limiting transmission structure and the gate arm assembly of the transmission mechanism device provided in this embodiment of the present invention when the gate arm is in the raised position.

[0019] The reference numerals in the detailed embodiments are as follows: 100. Limiting transmission structure; 200. Transmission mechanism; 1. Turbine shaft; 11. First rotating shaft; 12. Blocking part; 2. Crank arm transmission component; 21. First arm; 22. Second arm; 23. First connecting hole; 24. Second connecting hole; 3. Limiting component; 31. First end; 32. Second end; 33. Second rotating shaft; 34. First connecting part; 35. Second connecting part; 36. First connecting channel; 37. Second connecting channel; 4. Drive motor; 5. Gate arm assembly; 51. Gate arm; 52. Rotating support; 53. Balance spring; 54. Fourth rotating shaft; 55. Fifth rotating shaft; 6. Mounting base; 61. Bearing. Detailed Implementation

[0020] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention. Example 1

[0021] Please see Figures 1-4 , Figure 1 A schematic diagram of an embodiment of the limiting transmission structure 100 of this utility model is shown. The limiting transmission structure 100 includes: a turbine shaft 1, a crank arm transmission component 2, and a limiting component 3 disposed between the turbine shaft 1 and the crank arm transmission component 2. One end of the turbine shaft 1 is connected to a drive motor 4, and the other end is fixedly connected to the limiting component 3, so that the limiting component 3 swings around the axis of the turbine shaft 1, and the swing plane of the limiting component 3 is perpendicular to the axis of the turbine shaft 1. One end of the crank arm transmission component 2 is connected to a brake arm assembly 5, and the other end is drively connected to the end of the limiting component 3 away from the turbine shaft 1, so that the crank arm transmission component 2 rotates on the swing plane with the swing of the limiting component 3; wherein, as shown Figure 1 As shown, when the brake arm assembly 5 is close to the turbine shaft 1, the crank arm transmission component 2 is in the retracted state; as Figure 2 As shown, when the brake arm assembly 5 is away from the turbine shaft 1, the crank arm transmission component 2 is in the raised state.

[0022] Specifically, one end of the turbine shaft 1 is connected to the drive motor 4 to obtain rotational power, and the other end is fixedly connected to the limiting member 3 by an interference fit, so that the limiting member 3 can rotate (oscillate) synchronously with the turbine shaft 1 around the first axis of the turbine shaft 1, and the oscillation plane of the limiting member 3 is perpendicular to the first axis of the turbine shaft 1.

[0023] The swing plane is a plane perpendicular to the first axis of the turbine shaft 1. When the limiting member 3 rotates from the first position to the second position on the swing plane under the rotation of the turbine shaft 1, it drives the crank arm transmission member 2 to rotate from the raised state to the lowered position. When the crank arm transmission member 2 is in the raised state, the gate arm assembly 5 is in the raised state. When the crank arm transmission member 2 is in the lowered state, the gate arm assembly 5 is in the lowered state.

[0024] The crank arm drive component 2 and the limiting component 3 are connected at the ends away from the turbine shaft component 1, allowing the crank arm drive component 2 to rotate relative to the limiting component 3 in the swing plane. By fixing the limiting component 3 to the turbine shaft component 1 and drivingly connecting it to the crank arm drive component 2, the crank arm drive component 2 can rise and fall over a wide range. Simultaneously, the rotational connection between the limiting component 3 and the crank arm drive component 2 allows for minor adjustments to its state during rising and falling, adapting to changes in the states of the gate arm assembly 5 and the limiting component 3. This ensures smooth connection and rotation with the gate arm assembly 5 and the limiting component 3, guaranteeing the smooth operation of the transmission mechanism 200.

[0025] In the lowering state, when the gate arm assembly 5 returns to the horizontal position, a rigid connection is formed between the gate arm assembly 5, the crank arm transmission component 2, and the limiting component 3. The movement of the gate arm assembly 5 is stopped, and the crank arm transmission component 2 then acts on the limiting component 3, preventing the limiting component 3 from continuing to swing in the lowering direction. In the raising state, when the gate arm assembly 5 is in the limiting position, the end connected to the crank arm transmission component 2 will rotate around the fulcrum of the gate arm itself and tilt upward in the vertical direction during the raising process. Due to the connection relationship between the crank arm transmission component 2 and the limiting component 3, when the gate arm assembly 5 reaches the vertical limit position, the tilting movement of the gate arm assembly 5 is constrained by the connection point between the crank arm transmission component 2 and the limiting component 3. This constraint reaction force prevents the limiting component 3 from continuing to swing in the raising direction.

[0026] In another implementation of this embodiment, such as Figure 2 , Figure 3 as well as Figure 4 As shown, the turbine shaft 1 includes a first rotating shaft 11. The end of the first rotating shaft 11 away from the drive motor 4 is fixedly connected to the limiting member 3, and partially passes through the limiting member 3 and extends towards the crank arm transmission member 2 to form a blocking part 12. When the crank arm transmission member 2 is in the lowered state, the blocking part 12 is close to the middle section of the crank arm transmission member 2 on the swing plane and abuts against the crank arm transmission member 2 to restrict the rotation of the crank arm transmission member 2. When the crank arm transmission member 2 is in the raised state, the blocking part 12 is away from the end of the crank arm transmission member 2 that is connected to the brake arm assembly 5.

[0027] Driven by the drive motor 4, the first rotating shaft 11 rotates around the first axis, causing the limiting member 3 to swing around the first axis. Part of the first rotating shaft 11 extends through the limiting member 3 toward the crank arm transmission member 2 to form a blocking part 12, which is located on one side of the crank arm transmission member 2.

[0028] When the drive motor 4 drives the turbine shaft 1 and the limiting member 3 to swing, causing the crank arm transmission member 2 to move to the falling state, during the falling process, the middle section of the crank arm transmission member 2 will approach the blocking part 12. At this time, if the drive motor 4 fails to stop due to signal failure or other reasons, the crank arm transmission member 2 will continue to approach the blocking part 12, causing the crank arm transmission member 2 to mechanically abut against the blocking part 12. That is, the blocking part 12 will forcibly prevent the crank arm transmission member 2 from continuing to move in the falling direction through direct physical interference, thereby realizing the mechanical hard limit of the gate arm 51 in the horizontal position.

[0029] Furthermore, such as Figure 2 , Figure 3 as well as Figure 4 As shown, the crank arm transmission component 2 includes a first arm 21 and a second arm 22, and the included angle between the first arm 21 and the second arm 22 is less than 180 degrees, as shown in the figure. Figure 1 As shown, when the crank arm drive component 2 is in the lowered state, the end of the turbine shaft component 1 away from the drive motor 4 is placed inside the connecting angle. When the crank arm drive component 2 is in the raised state, the turbine shaft component 1 is located outside the connecting angle. Specifically, when the crank arm drive component 2 moves to the lowered state, the opening direction of the connecting angle faces the blocking part 12. When the crank arm drive component 2 is in the raised state, the crank arm drive component 2 is vertically higher than the turbine shaft component 1, and the blocking part 12 is located below the crank arm drive component 2.

[0030] When the crank arm drive 2 moves towards the falling state, during the swinging process of the first arm 21 of the crank arm drive 2, the blocking part 12 will move inward towards the connecting angle, that is, the inner side of the connecting angle of the crank arm drive 2 will gradually approach the blocking part 12; when the gate arm 51 of the gate arm assembly 5 reaches the horizontal falling limit position, the inner side of the connecting angle of the crank arm drive 2 will make mechanical contact and abut against the blocking part 12. Since the blocking part 12 is fixed, it can forcibly prevent the crank arm drive 2 from continuing to swing in the falling direction, thereby achieving mechanical hard limit.

[0031] In this embodiment, by making the connection angle between the first arm 21 and the second arm 22 of the crank arm transmission component 2 less than 180 degrees, when the crank arm transmission component 2 is in the fall-off limit state, the fixed turbine shaft 1 (blocking part 12) is located within the "V-shaped" connection angle of the crank arm. At this time, the impact force is transmitted from the second arm 22 (output arm), and after passing through the "V-shaped" connection point (corner), it is directly transmitted to the fixed blocking part 12 through the inner wall directly connected to the blocking part 12. This avoids all the force acting directly on the connection point between the first arm 21 and the limit component 3, which would cause a huge bending moment at the connection point. This makes the entire limit action strong and powerful, with extremely high structural stability, effectively resisting impact and preventing deformation. At the same time, it also greatly optimizes the installation space utilization of the crank arm transmission component 2, significantly reducing the space occupied by the entire limit transmission structure 100 in the radial direction, providing a basis for the miniaturization and thinning design of the barrier gate box, making the equipment smaller and more aesthetically pleasing.

[0032] Furthermore, the length of the second arm 22 is greater than the length of the first arm 21. In the articulated arm drive, the first arm 21 (power arm) is the input end, and the second arm 22 is the output end. According to the lever principle, when the output arm (second arm 22) is longer than the power arm (first arm 21), a small displacement or angle at the input end will produce an amplified displacement at the output end. This allows the limit member 3 and the first arm 21 to swing by only a relatively small angle, so that the longer second arm 22 can drive the end of the gate arm assembly 5 connected to the second arm 22 to produce a larger lifting stroke. This allows the gate arm 51 to quickly reach the vertical or horizontal limit position, effectively improving the lifting speed of the barrier gate and reducing vehicle waiting time. At the same time, the longer second arm 22 allows the gate arm 51 (especially the longer gate arm 51) to output a larger torque through the transmission ratio when starting, especially when encountering obstacles and needing to rebound. This enhances the load-bearing capacity of the entire barrier gate, enabling the limit transmission structure 100 to drive the heavy or long gate arm 51 more stably, while ensuring that the anti-smashing function (obstacle rebound) has sufficient torque reserve to reliably execute.

[0033] In one implementation, such as Figure 3 and Figure 4 As shown, the limiting member 3 includes a first end 31 and a second end 32; the end of the turbine shaft 1 away from the drive motor 4 is fixedly connected to the first end 31; the second end 32 is connected to the end of the crank arm transmission member 2 away from the brake arm assembly 5; the end of the crank arm transmission member 2 away from the brake arm assembly 5 is provided with a first connecting hole 23, and the second end 32 is provided with a second rotating shaft 33, the axis of the second rotating shaft 33 being the second axis; the second rotating shaft 33 is partially placed in the first connecting hole 23 so that the crank arm transmission member 2 can rotate relative to the second end 32 around the second axis; the axis of the first rotating shaft 11 of the turbine shaft 1 is the first axis, the axis of the second rotating shaft 33 is the second axis, and the first axis and the second axis are parallel.

[0034] The second axis of the second rotating shaft 33 is parallel to the first axis of the first rotating shaft 11, and the first axis is perpendicular to the swing plane, so that the limiting member 3 and the crank arm transmission member 2 can rotate relative to each other on the swing plane through the first connecting hole 23 on the first arm 21 and the second rotating shaft 33 on the second end 32. When the limiting member 3 rotates and drives the crank arm transmission member 2 to switch between the raised state and the lowered state, the crank arm transmission member 2 can rotate relative to the limiting member 3 to adjust the relative state between the crank arm transmission member 2 and the limiting member 3 within a small range to adapt to the state changes of the gate arm assembly 5.

[0035] In this embodiment, the transmission relationship between the limiting member 3 and the crank arm transmission member 2 is defined as a standard rotary pair by the cooperation between the second rotating shaft 33 of the second end 32 and the first connecting hole 23 on the first arm 21. The relative motion between the crank arm transmission member 2 and the limiting member 3 is constrained to pure rotation around the axis, which greatly reduces unnecessary sliding friction and energy loss, making the transmission process smoother and more precise, with less wear and a longer service life. At the same time, the first axis and the second axis are parallel to each other, ensuring that the swing plane of the limiting member 3, the movement plane of the crank arm transmission member 2, and the lifting and lowering plane of the gate arm 51 are parallel or coplanar. This eliminates the additional torque and spatial interference caused by the non-parallel axes, ensuring the smoothness of force transmission between the various structures in the entire device, avoiding jamming, and significantly improving the stability and reliability of the transmission mechanism device 200.

[0036] In one implementation, such as Figure 4 As shown, the end of the crank arm drive member 2 away from the second end 32 is provided with a second connecting hole 24. The gate arm assembly 5 includes a third rotating shaft (not shown in the figure), and part of the third rotating shaft is placed in the second connecting hole 24 so that the crank arm drive member 2 can rotate relative to the gate arm assembly 5 around the third axis of the third rotating shaft; the third axis is parallel to the first axis.

[0037] Specifically, such as Figure 5 , Figure 6 as well as Figure 7 As shown, the gate arm assembly 5 includes a gate arm 51, a rotating support 52, and a balance spring 53. The middle section of the rotating support 52 is fixedly connected to the fourth rotating shaft 54 ​​of the gate arm 51. The fourth rotating shaft 54 ​​is rotatably connected to two bearings 61 located on the top surface of the mounting base 6 of the transmission mechanism 200. The rotating support 52 is located between the two bearings 61. The lower end of the balance spring 53 is fixedly connected to the bottom of the mounting base 6, and the higher end is provided with a fifth rotating shaft 55. The end of the rotating support 52 away from the crank arm transmission component 2 is rotatably connected to the fifth rotating shaft 55.

[0038] The rotating support 52 is connected to the crank arm transmission 2 at one end with a third transmission shaft. The second arm 22 is provided with a second connecting hole 24. The third transmission shaft is partially placed in the second connecting hole 24, so that the crank arm transmission 2 can rotate relative to the gate arm assembly 5 around the third axis of the third rotating shaft. This allows the crank arm transmission 2 to rotate relative to the rotating support 52 during rotation, adjusting the relative state between the two.

[0039] The axes of the fourth rotating shaft 54 ​​and the fifth rotating shaft 55 are parallel to the third axis of the third rotating shaft, and the third axis is parallel to the first axis. This ensures that the swing plane of the limit member 3, the movement plane of the crank arm transmission member 2, the lifting and lowering plane of the gate arm 51, and the rotation plane of the rotating support member 52 are parallel or coplanar. This eliminates the additional torque and spatial interference caused by the non-parallel axes, and significantly improves the stability and reliability of the transmission mechanism 200.

[0040] like Figure 7 As shown, when the gate arm 51 needs to be raised, the drive motor 4 starts and drives the turbine shaft 1 to rotate, causing the limiting member 3 fixed to the turbine shaft 1 to rotate counterclockwise. The rotation of the limiting member 3 acts on the first arm 21 through the second rotating shaft, pushing the crank arm transmission member 2 to move upward, and then pushing the rotating support member 52, forcing the end of the rotating support member 52 connected to the crank arm transmission member 2 to rotate upward along with the gate arm 51 around the fourth rotating shaft, raising the gate arm 51 from the horizontal position to the vertical position; during this process, the end of the rotating support member 52 away from the crank arm transmission member 2 moves downward around the axis of the fourth rotating shaft, causing the balance spring 53 to be gradually compressed. Figure 6 As shown, when the gate arm 51 needs to be lowered, the drive motor 4 controls the reversal or release, and the gate arm 51 begins to fall under the combined action of its own weight and the energy released by the balance spring 53; the two ends of the rotating support 52 rotate clockwise around the axis of the fourth rotating shaft, and the end of the rotating support 52 connected to the crank arm transmission 2 moves downward, and the crank arm transmission 2 swings downward and backward, so that the crank arm transmission 2 retracts and moves closer to the fixed turbine shaft 1; finally, when the gate arm 51 reaches the horizontal position precisely, the inner side of the connecting angle of the crank arm transmission 2 will directly abut against a specific part (blocking part 12) of the fixed turbine shaft 1, and the movement is forcibly stopped instantly, thereby achieving precise and reliable mechanical hard limit.

[0041] In one implementation, such as Figure 2 , Figure 3 as well as Figure 4As shown, the first end 31 is provided with a first connecting part 34 and a second connecting part 35. The first connecting part 34 and the second connecting part 35 are connected to each other at one end near the second end 32, and the other ends are arranged opposite each other at a distance. The opposite sides of the first connecting part 34 and the second connecting part 35 are recessed in the direction away from each other to form a first connecting channel 36. The end of the first rotating shaft 11 away from the drive motor 4 is placed through the first connecting channel 36 and fixedly connected to the first end 31.

[0042] Specifically, the first end 31 is provided with a first connecting portion 34 and a second connecting portion 35. The first connecting portion 34 and the second connecting portion 35 are connected to each other at one end near the second end 32 of the limiting member 3, while their other ends are spaced apart and arranged opposite each other, thus forming a U-shaped opening. On the inner surfaces of the first connecting portion 34 and the second connecting portion 35, that is, on both sides of the wall forming the U-shaped opening, there are grooves that are recessed in a direction away from each other. The two grooves are opposite each other to form a first connecting channel 36 through which the first rotating shaft 11 passes. The first connecting channel 36 is firmly connected to the first end 31 of the limiting member 3 by means of welding, fasteners or interference fit. This embodiment provides a first connecting channel 36 through which the first rotating shaft 11 passes by forming a groove on the inner side opposite to the first connecting part 34 and the second connecting part 35. This achieves double-sided surrounding support for the first rotating shaft 11, greatly enhancing the ability of the connection point between the first rotating shaft 11 and the first end 31 to resist torsional and bending moments. This makes the transmission of power from the turbine shaft 1 to the limiting part 3 more direct and robust, avoiding loosening, deformation or wear at the connection point. It is particularly suitable for scenarios where the barrier gate is frequently started and stopped and has a large impact.

[0043] In one implementation, such as Figure 2 , Figure 3 as well as Figure 4 As shown, the first connecting part 34 and the second connecting part 35 are each provided with a second connecting channel 37. The axes of the two second connecting channels 37 coincide, and the second connecting channel 37 is located further away from the second end 32 than the first connecting channel 36. The axis of the second connecting channel 37 is perpendicular to the axis of the first connecting channel 36. A fastener passes through the two second connecting channels 37 to bring the first connecting part 34 and the second connecting part 35 closer to each other, so as to clamp and fix the first rotating shaft 11 located in the first connecting channel 36.

[0044] During assembly, a fastener (e.g., a high-strength bolt) passes through two aligned second connecting channels 37. When the nut on the fastener is tightened, the tightening force generated by the fastener will force the free ends of the first connecting portion 34 and the second connecting portion 35 to move closer to each other, achieving the "convergence" of the free ends of the first connecting portion 34 and the second connecting portion 35. This causes the inner diameter of the first connecting channel 36 to shrink synchronously, thereby firmly clamping the first rotating shaft 11 located in the first connecting channel 36.

[0045] This embodiment allows the first rotating shaft 11 to be easily inserted into the first connecting channel 36 using a clearance fit or a small transition fit, which facilitates the installation and disassembly of the turbine shaft 1 and the limiting member 3; the turbine shaft 1 and the limiting member 3 are fixedly connected by the fastener and the second connecting channel 37, which greatly reduces the assembly difficulty, time and the skill requirements of the workers. Example 2

[0046] like Figure 5 As shown, based on Embodiment 1, this embodiment provides a transmission mechanism device 200. The transmission mechanism device 200 includes: a limiting transmission structure 100 as provided in any of Embodiment 1, and a drive motor 4 and a gate arm assembly 5 connected to the limiting transmission structure 100. The transmission mechanism device 200 provided in this embodiment controls the raising and lowering of the gate arm 51 of the barrier gate assembly through the limiting transmission structure 100, completely eliminating the need for additional limiting blocks, brackets, and adjusting screws that are independently installed outside the transmission chain in traditional barrier gates. Through the structure and motion relationship of the transmission components such as the turbine shaft 1, the limiting component 3, and the crank arm transmission component 2, direct and rigid mechanical limiting is achieved at the transmission endpoint. This not only greatly simplifies the mechanical structure of the device, reduces the number of parts, and significantly reduces material and assembly costs, but also fundamentally avoids external obstructions. The limit transmission structure 100 addresses issues such as loosening, displacement, and misalignment of the gate arm 51 due to installation errors or long-term impacts. It provides a hard limit based on physical interference, independent of any circuitry, ensuring absolute reliability even in extreme cases where the electronic control system fails completely, preventing the gate arm 51 from "overshooting" or falling excessively. Furthermore, the limit transmission structure 100 integrates transmission and mechanical limiting, resulting in a more compact overall structure, more direct force transmission, and smoother operation of all components. This makes the reliability and lifespan of this structure far superior to traditional split-type limit solutions. Example 3

[0047] Based on Embodiment 2, this embodiment provides a barrier gate device, which includes the transmission mechanism 200 provided in Embodiment 2. The barrier gate device provided in this embodiment eliminates the independent external limit blocks and other components found in traditional barrier gates. It utilizes the self-connection relationship of the limit transmission structure 100 to achieve mechanical hard limiting, greatly simplifying the structure. This not only significantly reduces the overall material and manufacturing costs of the barrier gate device, but also ensures the accuracy and long-term reliability of the boom's endpoint position throughout its entire lifespan by eliminating the potential installation and loosening risks associated with external blocks.

[0048] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by those skilled in the art to which the embodiments of this utility model pertain.

[0049] In the description of this embodiment of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present 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. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0050] Furthermore, technical terms such as "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0051] In the description of this embodiment of the invention, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0052] In the description of this embodiment of the invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A limiting transmission structure, characterized in that, The limiting transmission structure includes: a turbine shaft, a crank arm transmission component, and a limiting component disposed between the turbine shaft and the crank arm transmission component; One end of the turbine shaft is used to connect to the drive motor, and the other end is fixedly connected to the limiting member, so that the limiting member swings around the axis of the turbine shaft, and the swing plane of the limiting member is perpendicular to the axis of the turbine shaft. One end of the crank arm drive is used to connect to the brake arm assembly, and the other end is driven to the end of the limiting member away from the turbine shaft, so that the crank arm drive rotates on the swing plane with the swing of the limiting member. When the brake arm assembly is close to the turbine shaft, the crank arm drive is in a lowered state; when the brake arm assembly is far from the turbine shaft, the crank arm drive is in a raised state.

2. The limiting transmission structure according to claim 1, characterized in that, The turbine shaft includes a first rotating shaft, one end of which is fixedly connected to the limiting member and extends through the limiting member and toward the crank arm transmission member to form a blocking part. When the crank arm drive is in the lowered state, the blocking part is close to the middle section of the crank arm drive on the swing plane and abuts against the crank arm drive to restrict the rotation of the crank arm drive; when the crank arm drive is in the raised state, the blocking part is away from the end of the crank arm drive that is connected to the brake arm assembly.

3. The limiting transmission structure according to claim 1, characterized in that, The crank arm drive includes a first arm and a second arm, and the connection angle formed by the first arm and the second arm is less than 180 degrees. When the crank arm drive is in the lowered state, the end of the turbine shaft away from the drive motor is placed inside the connection angle. When the crank arm drive is in the raised state, the turbine shaft is located outside the connection angle.

4. The limiting transmission structure according to claim 3, characterized in that, The length of the second arm is greater than the length of the first arm.

5. The limiting transmission structure according to any one of claims 1-4, characterized in that, The limiting component includes a first end and a second end; the end of the turbine shaft component away from the drive motor is fixedly connected to the first end; the second end is drively connected to the end of the crank arm transmission component away from the brake arm assembly. The crank arm transmission component has a first connecting hole at one end away from the brake arm assembly, and a second rotating shaft at the second end, the axis of which is a second axis; the second rotating shaft is partially placed in the first connecting hole so that the crank arm transmission component can rotate relative to the second end around the second axis. The axis of the first rotating shaft of the turbine shaft is the first axis, and the axis of the second rotating shaft is the second axis. The first axis and the second axis are parallel.

6. The limiting transmission structure according to claim 5, characterized in that, The crank arm drive member has a second connecting hole at one end away from the second end. The gate arm assembly includes a third rotating shaft, and part of the third rotating shaft is placed in the second connecting hole so that the crank arm drive member can rotate relative to the gate arm assembly around the third axis of the third rotating shaft; the third axis is parallel to the first axis.

7. The limiting transmission structure according to claim 5, characterized in that, The first end is provided with a first connecting part and a second connecting part. The first connecting part and the second connecting part are connected to each other at one end near the second end, and are arranged opposite each other at a distance from the other end. The opposite sides of the first connecting part and the second connecting part are recessed in a direction away from each other to form a first connecting channel. The end of the first rotating shaft away from the drive motor is placed through the first connecting channel and fixedly connected to the first end.

8. The limiting transmission structure according to claim 7, characterized in that, The first connecting portion and the second connecting portion are each provided with a second connecting channel, the axes of the two second connecting channels coincide, and the second connecting channel is located further away from the second end than the first connecting channel; the axis of the second connecting channel is perpendicular to the axis of the first connecting channel; A fastener passes through the two second connecting channels to bring the first connecting portion and the second connecting portion closer together, so as to clamp and fix the first rotating shaft located in the first connecting channel.

9. A transmission mechanism, characterized in that, The transmission mechanism includes: a limiting transmission structure as described in any one of claims 1-8, and the drive motor and the brake arm assembly connected to the limiting transmission structure.

10. A barrier gate device, characterized in that, The barrier gate device includes the transmission mechanism as described in claim 9.

Images