A harmonic reducer for a barrier gate and a barrier gate device

Abstract

The present invention relates to a harmonic reducer for a barrier gate and a barrier gate device. An output shaft (6) parallel to the shaft of a motor (10) is arranged inside a closed housing. One end of the output shaft (6) extends out of the closed housing for driving an external barrier gate rod. A cam (16) is arranged at the other end of the output shaft (6). The cam (16) is driven by the shaft of the motor (10) through a synchronous belt. Axially along the output shaft (6), one end of the cam (16) is an elliptical cam. A flexible bearing (18) is arranged between the outside of the elliptical cam and a flexspline (20). A steel gear (19) is arranged outside the flexspline (20), and the steel gear (19) is fixed to the closed housing. The motor drives the harmonic reducer through a transmission belt to drive the barrier gate rod to lift and lower. It has the characteristics of low backlash and high transmission accuracy. The barrier gate rod is stable without jitter phenomenon. At the same time, it has the advantages of simple structure, compact structure, convenient assembly and maintenance, etc.

Description

Technical Field

[0001] The present invention belongs to the technical fields of security monitoring, road barriers and access control gates, and particularly relates to a harmonic reducer for a road barrier and a road barrier device. Background Art

[0002] Harmonic reducers have the advantages of compact structure, small size, light weight, large load-bearing capacity, small backlash and high transmission accuracy, and are widely used in the fields of industrial robots, aerospace and precision machine tools. A harmonic reducer is composed of a steel gear, a flexible gear and a wave generator. The elliptically deformed wave generator is installed inside the elastic flexible gear. The rotation of the wave generator forces the tooth profiles of the flexible gear and the steel gear to periodically mesh and separate, thereby achieving the effect of differential tooth reduction.

[0003] Traditional reducers for road barriers are mainly planetary reducers, gear sets and worm and worm gear reducers, and are combined with a four-bar linkage mechanism to reduce the impact on the reducer. However, traditional reducers have the disadvantage of backlash, and the road barrier rod has the problem of jitter. Moreover, they have the disadvantages of complex mechanism, high failure rate and inconvenient maintenance.

[0004] When using a traditional harmonic reducer in the field of road barriers, on the one hand, it is restricted by the price cost, and on the other hand, it cannot balance light weight and miniaturization and is not applicable. Due to the standard outer shape of the traditional harmonic reducer, major changes need to be made to the overall outer shape characteristics and internal structure when it is installed as a whole, and it cannot be assembled very compactly. At the same time, the outer shape of the traditional harmonic reducer is of a flange type. Every time the reducer is maintained, the external protection of the road barrier needs to be disassembled, and then the harmonic reducer is removed and the harmonic reducer is disassembled for maintenance, which is also inconvenient for maintenance. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a harmonic reducer for a road barrier and a road barrier device, which have a simple and compact structure, are convenient for assembly and maintenance, have a low production and manufacturing cost, and have a wide applicability.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A harmonic reducer for a barrier gate, characterized in that an output shaft (6) parallel to the shaft of the motor (10) is arranged inside a closed housing. One end of the output shaft (6) extends out of the closed housing for driving an external barrier gate rod. A cam (16) is arranged at the other end of the output shaft (6). The cam (16) and the shaft of the motor (10) are driven by a synchronous belt. Along the axial direction of the output shaft (6), one end of the cam (16) is an oval cam, and the other end is a driven pulley for synchronous belt drive. A balance bearing (15) is installed between the inside of the driven pulley and the output shaft (6). A flexible bearing (18) is arranged between the outside of the oval cam and the flexspline (20). A steel gear (19) is arranged outside the flexspline (20). The steel gear (19) is fixed to the closed housing, and the flexspline (20) is rigidly connected to the output shaft (6). Support bearings are arranged between the output shaft (6) and the closed housing.

[0008] According to the above technical solution, a position magnet (14) is arranged at the end of the output shaft (6) close to the driven pulley, and a position sensor (9) is arranged at the top of the closed housing at an interval opposite to the position magnet (14).

[0009] According to the above technical solution, a boss is arranged in the middle of the output shaft (6). At both ends of the boss, front and rear support bearings are installed between the output shaft (6) and the external closed housing.

[0010] According to the above technical solution, a balance rod (11) perpendicular to the axial direction of the output shaft (6) is arranged on the boss of the output shaft (6). The balance rod (11) extends out of the closed housing, and a pin shaft parallel to the output shaft (6) is arranged at the end. A balance spring (5) is arranged symmetrically with respect to the balance rod (11) at both ends of the pin shaft. The two balance springs (5) are arranged in parallel and are perpendicular to the balance rod (11) and the output shaft (6) at the same time. The tops of the two balance springs (5) are fixed to the pin shaft, and the bottoms are fixed to the barrier gate body (41).

[0011] According to the above technical solution, a driving pulley (13) is arranged on the shaft of the motor (10), and the driving pulley (13) is engaged with the driven pulley on the cam (16) through a transmission belt (12).

[0012] According to the above technical solution, the belt drive mode of the transmission belt (12) is synchronous belt drive or multi-wedge belt drive mode.

[0013] According to the above technical solution, the housing (7) and the dust cover (8) at the top are buckled with each other to form a closed housing. A fixing plate (17) is clamped between the housing (7) and the dust cover (8). The motor (10) is fixed on the fixing plate (17), and the fixing plate (17) is also fixed to the periphery of the cam (16).

[0014] According to the above technical solution, the housing (7) is formed by die-casting of aluminum alloy, and the dust cover (8) is formed by plastic injection molding.

[0015] According to the above technical solution, the fixing plate (17) is formed by cutting a flat steel plate.

[0016] A barrier gate device, characterized in that the above-mentioned harmonic reducer for the barrier gate is adopted, and one end of the output shaft (6) extending out of the housing (7) is connected to the barrier gate rod fixing seat (2), and the barrier gate rod (1) is fixed on the barrier gate rod fixing seat (2).

[0017] The harmonic reducer for the barrier gate and the barrier gate device proposed by the present invention adopt an integrated design. The motor drives the harmonic reducer through a transmission belt to drive the barrier gate rod to lift and lower. The harmonic reducer itself has the characteristics of low backlash and high transmission accuracy. The barrier gate rod is stable without jitter phenomenon, and at the same time has the advantages of simple structure, compact structure, convenient assembly and maintenance. Brief Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the barrier gate device implemented according to the present invention.

[0019] Figure 2 It is an internal structural diagram of the barrier gate device implemented according to the present invention.

[0020] Figure 3 It is a schematic structural diagram of the harmonic reducer for the barrier gate implemented according to the present invention.

[0021] Figure 4 It is an internal structural diagram of the harmonic reducer for the barrier gate implemented by the present invention.

[0022] Appendix Figures 1-4 The corresponding reference numerals in the drawings are as follows: 1. Barrier gate rod; 2. Barrier gate rod fixing seat; 3. Harmonic reducer; 4. Machine body fixing seat; 41. Barrier gate machine body; 5. Balance spring; 6. Output shaft; 7. Housing; 8. Dust cover; 9. Position sensor; 10. Driving motor; 11. Balance rod; 12. Transmission belt; 13. Driving pulley; 14. Position magnet; 15. Balance bearing; 16. Cam; 17. Fixing plate; 18. Flexible bearing; 19. Steel wheel; 20. Flexural gear; 21. Bearing fixing sleeve; 22. Inner support bearing; 23. Outer support bearing; 24. Sealing ring. Detailed Embodiments

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] The following is based on Appendix Figures 1-4Describe the specific embodiments of the present invention.

[0025] As shown in the appended Figure 1 figures, the barrier gate rod 1 is installed on the barrier gate body 41. The internal structure of the barrier gate body 41 is as shown in the appended Figure 2 and appended Figure 3 figures. The barrier gate rod 1 is fixedly connected to the barrier gate rod fixing seat 2. The barrier gate rod fixing seat 2 and the output shaft 6 of the harmonic reducer 3 are fixed by spline and bolts. The harmonic reducer 3 is fixed to the machine body fixing seat 4 by bolts. The machine body fixing seat 4 is a hollow flat frame body and is fixed to the barrier gate body 41 in a horizontal installation manner, which is convenient for assembly, installation, and later maintenance. As Figure 4 shown, a balance rod 11 is installed on the output shaft 6 of the harmonic reducer 3, and a balance spring 5 is installed at the end of the balance rod 11. The balance spring 5 can reduce the impact and driving torque of the barrier gate rod 1 on the harmonic reducer 3, and at the same time play a role of mechanical hard limit.

[0026] The internal structure of the harmonic reducer 3 is as shown in the appended Figure 4 figure. The driving motor 10 drives the driven pulley on the driving cam 16 through the driving pulley 13 on the motor output shaft. The camshaft is arranged parallel to the motor output shaft; the rotation of the cam 16 generates the rotation of the wave generator, forcing the tooth profile of the flexspline 20 to periodically mesh and separate from the tooth profile of the circular spline 19, achieving the effect of speed reduction. The flexspline 20 is rigidly connected to the output shaft 6 of the harmonic reducer 3, so as to drive the rotation of the barrier gate rod fixing seat 2 and the barrier gate rod 1 together with the output shaft 6.

[0027] Combined with the appended Figure 4 figures, the present invention is further described in detail: The driving motor 10 is fixed on the fixing plate 17. The fixing plate 17 and the circular spline 19 are fixed by countersunk head screws. The circular spline 19 is fixed to the housing 7 at the same time. The dust cover 8 is also installed on the fixing plate 17 to ensure the sealing of the belt drive mechanism. The output shaft of the driving motor 10 fixes the driving pulley 13 through a flat key. The driving pulley 13 and the driven pulley on the cam 16 transmit power through the transmission belt 12. The belt drive here can adopt synchronous belt drive or multi-wedge belt drive.

[0028] Axially along the output shaft 6, one end of the cam 16 is a driven pulley and the other end is an oval cam. A balance bearing 15 is installed between the inside of the driven pulley and the output shaft 6; a balance bearing 15 is installed between the inner ring of the cam 16 and one end of the output shaft 6. The inner ring of the balance bearing 15 is fixed to the end of the output shaft 6, and a driven pulley is arranged on the outer circumference of the balance bearing 15 outside the cam 16. At a position near the middle of one end of the output shaft 6, a flexible bearing 18 is installed between the outside of the cam 16 and the flexspline 20. The rotation of the cam 16 causes the wave generator to rotate, forcing the tooth profile of the flexspline 20 to periodically mesh with and disengage from the tooth profile of the steel ring 19 outside the flexspline 20, achieving the effect of speed reduction. At the rear of the cam 16, the flexspline 20 is rigidly fixed to the output shaft 6 by bolts. A boss is provided in the middle of the output shaft 6. At both ends of the boss, two front and rear support bearings, namely an inner support bearing 22 and an outer support bearing 23, are installed between the output shaft 6 and the external housing 7. A set of balance rods 11 perpendicular to the axis of the output shaft 6 is provided on the boss of the output shaft 6. The balance rods 11 extend from the housing 7 and a pin shaft parallel to the output shaft 6 is provided at the end. Two spring holes are symmetrically arranged with respect to the balance rods 11 at both ends of the pin shaft. Each spring hole is fixedly connected to a balance spring 5. The two balance springs 5 are arranged in parallel and are perpendicular to both the balance rods 11 and the output shaft 6 at the same time. The balance springs 5 pass through the middle through hole of the flat frame of the body fixing seat 4 and are constrained in the middle through hole. In this way, the bottom end of the balance spring 5 is hung at a fixed position on the base. Thus, because the barrier rod of the barrier gate extends, the force acting on the output shaft 6 is unbalanced, and there will be an unbalanced impact force during swinging. The function of the balance springs 5 is to balance or reduce the impact and driving torque of the barrier gate rod 1 on the harmonic reducer 3, and at the same time play the role of mechanical hard limit.

[0029] At the same time, a sealing ring 24 is assembled on the end faces of the output shaft 6 and the housing 7 to ensure the isolation and sealing between the body and the outside world. A position magnet 14 is inlaid on the other end face of the output shaft 6 (the end where the cam 16 is provided). The position sensor 9 is fixed on the dust cover 8 and is arranged opposite to the position magnet 14 at an interval. The rotation of the output shaft 6 can be sensed by the position sensor 9 to control the action of the drive motor 10, forming a closed-loop control.

[0030] Combined with the attached Figure 2 and the attached Figure 3 , the end of the output shaft 6 is fixed to the barrier gate rod fixing seat 2, and the barrier gate rod 1 is also fixed to the barrier gate rod fixing seat 2. The harmonic reducer 3 drives the raising and lowering of the barrier gate rod 1.

[0031] The body structural parts of the harmonic reducer 3 adopt different materials and processes. The housing 7 is formed by die-casting aluminum alloy, the fixing plate 17 is formed by cutting a flat steel plate, and the dust cover 8 is formed by plastic injection molding.

[0032] It should be noted that according to the needs of implementation, each step / component described in this application can be split into more steps / components, or two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0033] Those skilled in the art can easily understand that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A harmonic reducer for a barrier gate, characterized in that: An output shaft (6) parallel to the motor (10) shaft is arranged in the closed housing. One end of the output shaft (6) extends out of the closed housing for driving an external barrier gate rod. A cam (16) is arranged at the other end of the output shaft (6). The cam (16) is driven by a synchronous belt with the motor (10) shaft. Along the axial direction of the output shaft (6), one end of the cam (16) is an oval cam, and the other end is a driven pulley for synchronous belt drive. A balance bearing (15) is installed between the inside of the driven pulley and the output shaft (6). A flexible bearing (18) is arranged between the outside of the oval cam and the flexspline (20). A steel ring (19) is arranged outside the flexspline (20). The steel ring (19) is fixed to the closed housing. The flexspline (20) is rigidly connected to the output shaft (6). Support bearings are arranged between the output shaft (6) and the closed housing. A boss is arranged in the middle of the output shaft (6). Two support bearings are installed between the output shaft (6) and the external closed housing at both ends of the boss. A balance rod (11) perpendicular to the axial direction of the output shaft (6) is arranged on the boss of the output shaft (6). The balance rod (11) extends out of the closed housing and a pin shaft parallel to the output shaft (6) is arranged at the end. Two balance springs (5) are symmetrically arranged on both sides of the pin shaft with respect to the balance rod (11). The two balance springs (5) are arranged in parallel and are perpendicular to both the balance rod (11) and the output shaft (6) at the same time. The tops of the two balance springs (5) are fixed to the pin shaft, and the bottoms are fixed to the barrier gate body (41).

2. The harmonic reducer for a barrier gate according to claim 1, wherein A position magnet (14) is arranged at the end of the output shaft (6) close to the driven pulley. A position sensor (9) is arranged at the top of the closed housing opposite to the position magnet (14) at an interval.

3. The harmonic reducer for a barrier gate according to claim 1, characterized in that A driving pulley (13) is arranged on the shaft of the motor (10). The driving pulley (13) is engaged with the driven pulley on the cam (16) through a transmission belt (12).

4. The harmonic reducer for a barrier gate according to claim 1, wherein The belt drive mode of the transmission belt (12) is synchronous belt drive or multi-wedge belt drive mode.

5. The harmonic reducer for a barrier gate according to claim 1, characterized in that The housing (7) and the dust cover (8) at the top are buckled with each other to form a closed housing. A fixing plate (17) is clamped between the housing (7) and the dust cover (8). The motor (10) is fixed on the fixing plate (17). The fixing plate (17) is also fixed to the periphery of the cam (16).

6. The harmonic reducer for a barrier gate according to claim 1, wherein The housing (7) is formed by die-casting aluminum alloy, and the dust cover (8) is formed by plastic injection molding.

7. The harmonic reducer for a barrier gate according to claim 1, wherein The fixing plate (17) is formed by cutting a flat steel plate.

8. A barrier gate device, characterized in that When using the harmonic reducer for a barrier gate described in any one of the above claims 1-7, one end of the output shaft (6) extending out of the housing (7) is connected to a barrier gate rod fixing seat (2), and a barrier gate rod (1) is fixed on the barrier gate rod fixing seat (2).

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