Dual-drive 180-degree turnover mechanism

Abstract

The invention discloses a dual-drive 180-degree turnover mechanism, which relates to the technical field of large equipment protection devices, and comprises a fixing frame, a protection cover body, a first drive unit, a second drive unit and a T-shaped rod, the protective cover body is hinged to the fixing frame. The cylinder barrel end of the first driving unit is hinged to the fixing frame, and the movable end of the first driving unit is hinged to the T-shaped rod. Through the cooperative transmission design of the first driving unit, the second driving unit and the T-shaped rod, two 90-degree rotations are superposed. Specifically, the first driving unit drives the T-shaped rod to rotate by 90 degrees, the second driving unit drives the protective cover to rotate by 90 degrees, and through the coupling effect, 180-degree complete overturning of the protective cover body is finally achieved. The technical bottleneck that the opening and closing angle of a traditional protective door or protective cover is small is solved, and the special requirement of large field equipment for the large opening and closing angle of the protective cover is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large equipment protection device, and particularly relates to a double-drive 180-degree turnover mechanism. BACKGROUND

[0002] The protective cover is an important component of the large equipment and is used for resisting the invasion of wind, snow, rain and sand to protect the personnel and equipment safety of the large equipment under the field working condition. The automatic protective cover plays an important role as an important protection component and can improve the working safety and service life of the large equipment in the outdoor, so that the driving structure design of the protective cover is important for the whole machine equipment.

[0003] The large field protective cover needs to be automatically rotated by 180 degrees and has the ability to prevent wind at any rotating position. The protective cover can be regarded as a special protective door, and the opening and closing angle of the general protective door is generally 90-110 degrees, which is too small. The hinge and driving device of the protective door cannot bear too high load and are only used as functional components, not as structural components. Therefore, a turnover mechanism is needed to drive the protective cover and has the locking ability at any movement position.

[0004] Therefore, in view of the above phenomenon, a double-drive 180-degree turnover mechanism is provided to meet the needs of actual use. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a double-drive 180-degree turnover mechanism, which can drive the large protective cover to realize reliable 180-degree turnover and automatically lock at any position, and has high rigidity and high wind resistance.

[0006] To achieve the above purpose, the double-drive 180-degree turnover mechanism provided by the present application comprises a fixed frame, a protective cover body, a first driving unit, a second driving unit and a T-shaped rod. The protective cover body is hinged to the fixed frame. The cylinder end of the first driving unit is hinged to the fixed frame, and the movable end of the first driving unit is hinged to the T-shaped rod. The T-shaped rod is hinged to the fixed frame. The cylinder end of the second driving unit is hinged to the protective cover body, and the movable end of the second driving unit is hinged to the T-shaped rod. The first driving unit and the second driving unit are both electric push rod mechanisms, the electric push rod mechanism comprises a screw transmission pair, and the first driving unit and the second driving unit are arranged on the two sides of the T-shaped rod respectively.

[0007] Preferably, the electric push rod mechanism comprises a motor, a speed reducer, an outer cylinder, an extension rod and a screw rod transmission pair composed of a transmission screw rod and a screw nut; the transmission screw rod is a ladder type screw rod, which is rotatably installed in the outer cylinder; the screw nut is sleeved on the ladder type screw rod, and the screw nut is fixedly connected with the extension rod; the motor drives the rotation of the ladder type screw rod through the speed reducer, and the rotation of the ladder type screw rod is converted into the linear motion of the extension rod along the axis of the outer cylinder.

[0008] Preferably, the electric push rod mechanism further comprises a gear transmission mechanism; the gear transmission mechanism comprises a driving gear and a driven gear which are engaged with each other; the driven gear is sleeved on the transmission screw rod, and the driving gear is sleeved on the output shaft of the speed reducer.

[0009] Preferably, the electric push rod mechanism further comprises a manual interface; the manual interface is coaxially arranged with the driving gear, and the manual interface is used for driving the driving gear by a manual tool when power is off.

[0010] Preferably, the T-shaped rod comprises a hinged seat, a rod body, a first mounting ear and a second mounting ear; the hinged seat is fixedly installed on the fixed frame, the rod body is hinged with the hinged seat, the rod body is T-shaped, the first mounting ear and the second mounting ear are arranged at two ends of the T-shaped rod body respectively, the movable end of the first driving unit is hinged with the first mounting ear, and the movable end of the second driving unit is hinged with the second mounting ear.

[0011] Preferably, bearings are installed in the hinged holes of the first mounting ear and the second mounting ear.

[0012] Preferably, the rod body is provided with a support plate in the vertical direction.

[0013] Preferably, the first driving unit drives the T-shaped rod to rotate around the hinged point of the T-shaped rod with the fixed frame, and at the same time, the second driving unit drives the protective cover body to rotate around the hinged point of the protective cover body with the fixed frame, and the first driving unit and the second driving unit cooperatively move to realize the 180-degree overturning of the protective cover body.

[0014] Preferably, through the self-locking function of the screw rod transmission pair, the locking of the protective cover body at any position in the overturning stroke is realized.

[0015] Compared with the related art, the double-drive 180-degree overturning mechanism provided by the application has the following beneficial effects:

[0016] The present application provides a double drive 180 degree flip mechanism, which superimposes two 90 degree rotations through the cooperative transmission design of a first drive unit, a second drive unit and a T-shaped rod. Specifically, the first drive unit drives the T-shaped rod to rotate 90 degrees, the second drive unit drives the protective cover to rotate 90 degrees, and through coupling, the protective cover body is finally flipped 180 degrees. The technical bottleneck of small opening and closing angle of the traditional protective door or protective cover is solved, and the special needs of large field equipment for large opening and closing angle of the protective cover are met.

[0017] The present application adopts a configuration in which two drive units are symmetrically arranged on both sides of the T-shaped rod, forming a stable triangular force flow transmission path. This design disperses and balances the driving force applied to the fixed frame and the protective cover, avoiding the large bending moment and torsional load caused by single-point driving. At the same time, the vertical part of the T-shaped rod is constructed as a structure with enhanced stiffness, effectively resisting deformation caused by the weight of the drive unit and working load. This makes the present mechanism not only provide driving force, but also serve as a structural support component of the equipment, bearing mechanical load in harsh environments, solving the problem that the traditional protective door driving device cannot bear excessive load.

[0018] The core transmission components of the drive unit of the present application adopt trapezoidal screw nut pairs. Due to the inherent friction self-locking property of trapezoidal screws, when the motor stops driving, the screw nut pair can immediately achieve mechanical self-locking at any position without the need for additional braking devices. This feature ensures that the protective cover can be instantly locked at any intermediate position during opening or closing, and will not be blown by strong winds, greatly improving the safety and stability of the equipment in harsh weather conditions in the field, solving the problem of limited locking force or lack of effective locking ability in the prior art.

[0019] The gear transmission mechanism connects the reducer and the screw rod, achieving efficient and stable transmission of power and obtaining greater output torque. In addition, the manual interface provided at the output end of the reducer allows emergency operation through the manual crank in the event of power interruption or motor failure, driving the protective cover to open or close, greatly improving the reliability and practicality of the entire mechanism.

[0020] In summary, the present application successfully provides a protective cover driving solution for large field equipment with large flip angle, strong carrying capacity, reliable locking, smooth operation and emergency function through ingenious double drive and T-shaped rod linkage design, combined with the self-locking property of trapezoidal screws and the stable structure of symmetric arrangement. The comprehensive performance is significantly better than the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of the protective cover of the present application in the folded state.

[0022] Figure 2 is the overall structure schematic diagram of the protective cover in the unfolded state of the present application.

[0023] Figure 3 is the sectional structure schematic diagram of the electric push rod mechanism of the present application.

[0024] Figure 4 is the structure schematic diagram of the T-shaped rod of the present application.

[0025] Figure label: 1, fixed frame; 2, protective cover body; 3, first driving unit; 4, T-shaped rod; 5, second driving unit; 6, first support; 7, second support; 301, electric motor; 302, speed reducer; 303, manual interface; 304, transmission screw; 305, screw nut; 306, telescopic rod; 307, outer cylinder; 308, gear transmission mechanism; 41, hinged seat; 42, rod body; 43, first mounting ear; 44, second mounting ear; 8, hinge. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the drawings. It should be noted that the specific examples described here are only used to explain the present application, and are not used to limit the present application.

[0027] Example one

[0028] This embodiment provides a basic structure of a double-drive 180-degree overturning mechanism.

[0029] Referring to Figures 1 to 4 , the mechanism includes a fixed frame 1, a protective cover body 2, a first driving unit 3, a second driving unit 5, and a T-shaped rod 4. The fixed frame 1 serves as the basis of the entire mechanism and is fixed to the main body structure of the equipment. The protective cover body 2 is hinged to the fixed frame 1 through a hinge 8, so that the protective cover body 2 can rotate around the axis of the hinge 8.

[0030] The T-shaped rod 4 is fixed to the fixed frame 1 through the hinged seat 41 thereon, and the rod body 42 is hinged to the hinged seat 41, so that the rod body 42 can rotate around the hinged seat 41.

[0031] The cylinder end (i.e. the end of the outer cylinder 307) of the first driving unit 3 is hinged to the first support 6 on the fixed frame 1 through a support ear, forming a first rotation pair. The movable end (i.e. the end of the telescopic rod 306) of the first driving unit 3 is hinged to the first mounting ear 43 of the T-shaped rod 4 through a support ear, forming a second rotation pair.

[0032] The cylinder end of the second driving unit 5 is hinged with the second support 7 on the protective cover body 2 through a lug, forming a third rotary pair. The movable end of the second driving unit 5 is hinged with the second mounting lug 44 of the T-shaped rod 4 through a lug, forming a fourth rotary pair.

[0033] The working process is as follows:

[0034] Initially, the protective cover is in a folded state (as shown in Figure 1 ). When it is needed to be unfolded, the first driving unit 3 and the second driving unit 5 are synchronously retracted.

[0035] The first driving unit 3 is retracted, pulling its movable end, thereby driving the T-shaped rod 4 to rotate counterclockwise around its hinge point (hinge seat 41) on the fixed frame 1.

[0036] At the same time, the second driving unit 5 is retracted, and since its cylinder end is hinged on the protective cover body 2, its movable end exerts a pulling force on the second mounting lug 44 of the T-shaped rod 4. This pulling force is converted into a driving force on the protective cover body 2 through the T-shaped rod 4.

[0037] The rotary motion of the T-shaped rod 4 and the pulling force of the second driving unit 5 jointly drive the protective cover body 2 to unfold around the hinge 8 axis of the fixed frame 1.

[0038] When the first driving unit 3 and the second driving unit 5 are retracted to the shortest stroke, the protective cover body 2 is turned to a fully unfolded state (as shown in Figure 2 ), a total of 180 degrees.

[0039] The folding process is opposite, and is achieved by synchronous extension of the two driving units.

[0040] Embodiment Two

[0041] This embodiment is based on Embodiment One, referring to Figure 4 Taking the first driving unit 3 as an example, the first driving unit 3 comprises an electric push rod mechanism, which comprises an electric motor 301, a speed reducer 302, an outer cylinder 307, a transmission screw rod 304, a screw rod nut 305, an extension rod 306, a gear transmission mechanism 308, and a manual interface 303.

[0042] The transmission screw rod 304 is rotatably supported in the outer cylinder 307 through a bearing. The screw rod nut 305 is sleeved on the transmission screw rod 304 and is fixedly connected with the inner end of the extension rod 306. The transmission screw rod 304 and the screw rod nut 305 jointly constitute a screw rod transmission pair.

[0043] Preferably, to achieve the self-locking function, the transmission screw rod 304 is a trapezoidal screw rod. Since the thread angle of the trapezoidal screw pair is smaller than the friction angle, it has a reverse self-locking feature, i.e. when an external force acts on the telescopic rod 306, the screw rod cannot be driven to rotate. This feature ensures that the protective cover can be reliably locked at any position and will not be blown by external forces such as wind, meeting the needs of wind resistance in the wild.

[0044] The output shaft of the electric motor 301 is connected to the speed reducer 302, and the output shaft of the speed reducer 302 is connected to the transmission screw rod 304 through a gear transmission mechanism 308. Specifically, the gear transmission mechanism 308 includes a driving gear and a driven gear that mesh with each other, the driving gear is sleeved on the output shaft of the speed reducer 302, and the driven gear is fixedly sleeved on the end of the transmission screw rod 304. The rotational power of the electric motor 301 is transmitted to the driven gear through the driving gear after increasing the torque by the speed reducer 302, driving the transmission screw rod 304 to rotate. The rotational movement of the transmission screw rod 304 is converted into the linear telescopic movement of the telescopic rod 306 along the outer cylinder 307 by the screw nut 305.

[0045] To further improve the reliability of the mechanism, a manual interface 303 is provided at the output end (coaxial with the driving gear) of the speed reducer 302. The manual interface 303 can be a hexagonal head. When power failure or motor failure occurs, the operator can use the manual crank to insert the manual interface 303 to manually rotate the driving gear, thereby driving the entire transmission chain to achieve emergency deployment or folding of the protective cover.

[0046] Embodiment Three

[0047] This embodiment is based on embodiments one and two, referring to Figure 4 , the T-shaped rod 4 includes a hinged seat 41, a rod body 42, a first mounting ear 43, and a second mounting ear 44. The rod body 42 is mainly T-shaped, welded or integrally formed by a horizontal rod and a vertical rod.

[0048] To significantly increase the bending stiffness of the T-shaped rod 4 in the vertical plane, thereby reducing the deformation when bearing the weight of the driving unit and the load of the protective cover, the rod body 42 is designed to be strengthened in this embodiment. Specifically, the vertical part of the rod body 42 is provided with (or itself is) a support plate. The support plate greatly increases the cross-sectional modulus of the vertical rod, enabling it to effectively resist the bending moment transmitted by the first driving unit 3 and the second driving unit 5, ensuring the movement accuracy of the mechanism and preventing the hinged point from being stuck due to deformation of the rod.

[0049] The first mounting ear 43 and the second mounting ear 44 are respectively arranged at the two ends of the T-shaped rod body 42, and are respectively used to connect the movable ends of the first driving unit 3 and the second driving unit 5.

[0050] Embodiment Four

[0051] The embodiment is based on embodiments one to three. Referring to Figure 1 and Figure 2 The first driving unit 3 and the second driving unit 5 are arranged on both sides of the T-shaped rod 4 respectively. The symmetrical arrangement makes the driving force act on the T-shaped rod 4 symmetrically, avoids the mechanism to bear eccentric torque, and thus the operation is more stable, the vibration and wear are reduced, and the service life is prolonged.

[0052] In summary, the application drives the T-shaped rod 4 to rotate 90 degrees around the fixed frame 1 through the first driving unit 3, and drives the protective cover body 2 to rotate 90 degrees around the fixed frame 1 through the second driving unit 5, and finally realizes the 180-degree large-angle overturning of the protective cover body 2 through the "relay" transmission of the T-shaped rod 4. The whole mechanism has compact structure, large driving force, reliable self-locking ability and manual emergency function, high rigidity, and is particularly suitable for driving the protective cover of large outdoor equipment.

[0053] The above is only the preferred embodiment of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A dual drive 180 degree flip mechanism characterized by: The device comprises a fixed frame, a protective cover body, a first driving unit, a second driving unit and a T-shaped rod; the protective cover body is hinged to the fixed frame; the cylinder end of the first driving unit is hinged to the fixed frame, and the movable end of the first driving unit is hinged to the T-shaped rod; the T-shaped rod is hinged to the fixed frame; the cylinder end of the second driving unit is hinged to the protective cover body, and the movable end of the second driving unit is hinged to the T-shaped rod; the first driving unit and the second driving unit are both electric push rod mechanisms, and the electric push rod mechanisms comprise a screw transmission pair; the first driving unit and the second driving unit are arranged on the two sides of the T-shaped rod respectively.

2. A dual drive 180 degree flip mechanism according to claim 1, wherein, The electric push rod mechanism comprises a motor, a speed reducer, an outer cylinder, a telescopic rod and the screw transmission pair composed of a transmission screw rod and a screw nut; the transmission screw rod is a ladder-type screw rod, which is rotatably installed in the outer cylinder; the screw nut is sleeved on the ladder-type screw rod, and the screw nut is fixedly connected with the telescopic rod; the motor drives the ladder-type screw rod to rotate through the speed reducer, and the rotational movement of the ladder-type screw rod is converted into the linear movement of the telescopic rod along the axis of the outer cylinder.

3. A dual drive 180 degree flip mechanism according to claim 2, wherein, The electric push rod mechanism further comprises a gear transmission mechanism; the gear transmission mechanism comprises a driving gear and a driven gear which are engaged with each other; the driven gear is sleeved on the transmission screw rod, and the driving gear is sleeved on the output shaft of the speed reducer.

4. A dual drive 180 degree flip mechanism according to claim 3, wherein, The electric push rod mechanism further comprises a manual interface; the manual interface is coaxially arranged with the driving gear, and the manual interface is used for driving the driving gear by a manual tool when power is off.

5. A dual drive 180 degree flip mechanism according to claim 1, wherein, The T-shaped rod comprises a hinged seat, a rod body, a first mounting ear and a second mounting ear; the hinged seat is fixedly installed on the fixed frame, and the rod body is hinged to the hinged seat; the rod body is T-shaped, and the first mounting ear and the second mounting ear are arranged at the two ends of the T-shaped rod body respectively; the movable end of the first driving unit is hinged to the first mounting ear, and the movable end of the second driving unit is hinged to the second mounting ear.

6. A dual drive 180 degree flip mechanism according to claim 5, wherein, Bearings are installed in the hinged holes of the first mounting ear and the second mounting ear.

7. A dual drive 180 degree flip mechanism according to claim 5, wherein, The rod body is provided with a support plate in the vertical direction.

8. A dual drive 180 degree flip mechanism according to claim 1, wherein: The first driving unit drives the T-shaped rod to rotate around the hinged point of the T-shaped rod and the fixed frame, while the second driving unit drives the protective cover body to rotate around the hinged point of the protective cover body and the fixed frame; the first driving unit and the second driving unit cooperatively move to realize the 180-degree overturning of the protective cover body.

9. A dual drive 180 degree flip mechanism according to claim 2, wherein: Through the self-locking function of the screw transmission pair, the locking of the protective cover body at any position in the overturning stroke is realized.

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