Single-drive 180-degree turnover mechanism for protective cover

Abstract

The invention discloses a single-drive 180-degree turnover mechanism for a protective cover, and relates to the technical field of large equipment protective devices, the single-drive 180-degree turnover mechanism comprises a fixing frame, a protective cover body, a driving unit, a triangular rod and an adjustable connecting rod; the protective cover body is hinged to the fixing frame. One end of the driving unit is hinged to the fixing frame, and the other end of the driving unit is hinged to one end of the triangular rod. The middle of the triangular rod is hinged to the fixing frame. One end of the adjustable connecting rod is hinged to the other end of the triangular rod, and the other end of the adjustable connecting rod is hinged to the protective cover body. The linear motion of the push rod is efficiently converted into the 180-degree rotary motion of the protective cover through a planar connecting rod mechanism composed of the electric push rod, the triangular rod and the adjustable connecting rod, the structure is compact, and the cost is low. By means of the self-locking characteristic of transmission of the trapezoid lead screw, the protective cover can be reliably locked at any position in the overturning stroke without an additional braking or locking device, strong wind is effectively resisted, and the safety coefficient is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of large equipment protection device, and particularly relates to a single-drive 180-degree overturning mechanism for a protective cover. BACKGROUND

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

[0003] The large protective cover in the field 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, but there are significant differences from the general protective door. The opening and closing angle of the general protective door is usually 90-110 degrees, and the opening and closing angle is too small to meet the requirements of fully opening the protective cover to expose the equipment and fully closing the protective cover to provide comprehensive protection. In addition, the hinge and driving device of the ordinary protective door are only functional components and have low design load, and are not used as the main structural component to bear the huge external force under severe environments such as strong wind.

[0004] Therefore, the prior art lacks a special mechanism capable of driving a large protective cover to realize 180-degree overturning and reliably locking at any position to bear the wind load. In order to solve the above problems, there is an urgent need for an overturning mechanism with stable structure, reliable driving and self-locking capability. SUMMARY

[0005] The present application aims at the deficiencies of the prior art and provides a single-drive 180-degree overturning mechanism for a protective cover. The mechanism is driven by a single power source and can realize reliable 180-degree overturning of the protective cover. The self-locking property of the screw rod transmission is used to lock the protective cover at any position in the stroke and has strong wind resistance.

[0006] To achieve the above-mentioned purpose, the single-drive 180-degree overturning mechanism for a protective cover provided by the present application comprises a fixed frame, a protective cover body, a driving unit, a triangular rod and an adjustable connecting rod. The protective cover body is hinged to the fixed frame. One end of the driving unit is hinged to the fixed frame, and the other end of the driving unit is hinged to one end of the triangular rod. The middle part of the triangular rod is hinged to the fixed frame. One end of the adjustable connecting rod is hinged to the other end of the triangular rod, and the other end of the adjustable connecting rod is hinged to the protective cover body. The driving unit is an electric push rod mechanism, and the electric push rod mechanism comprises a screw rod transmission pair.

[0007] Preferably, the electric push rod mechanism comprises a motor, a reducer, an outer cylinder, an extension rod, and a 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 extension rod; the motor drives the rotation of the ladder-type screw rod through the 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, which comprises a driving gear and a driven gear that are in mesh with each other; the driven gear is fixedly sleeved on the input end of the ladder-type screw rod, and the driving gear is fixedly sleeved on the output shaft of the 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 to drive the rotation of the driving gear by a manual tool in a power-off state.

[0010] Preferably, the triangular rod comprises a rod body and a hinged seat; the hinged seat is fixedly arranged on the fixed frame; the middle part of the rod body is hinged to the hinged seat; the rod body is provided with a middle hinged part connected with the hinged seat, a first outer extension connecting part connected with the extension end of the driving unit, and a second outer extension connecting part connected with one end of the adjustable connecting rod; the first outer extension connecting part is provided with a first mounting ear, and the second outer extension connecting part is provided with a 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 adjustable connecting rod comprises a first connecting rod, a second connecting rod, a double-headed screw rod, a first fastening nut, and a second fastening nut; the first connecting rod and the second connecting rod are respectively provided with internal threaded holes; the internal threaded hole of the first connecting rod is screwed with one end of the double-headed screw rod, and the internal threaded hole of the second connecting rod is screwed with the other end of the double-headed screw rod; the first fastening nut is screwed on the double-headed screw rod and abuts against the end face of the first connecting rod, and the second fastening nut is screwed on the double-headed screw rod and abuts against the end face of the second connecting rod.

[0013] Preferably, the extension rod drives the triangular rod to swing around the hinged point of the triangular rod and the fixed frame, the swinging of the triangular rod drives the movement of the adjustable connecting rod, and the adjustable connecting rod drives the flip movement of the protective cover body around the hinged point of the protective cover body and the fixed frame.

[0014] Preferably, when the telescopic rod of the driving unit is extended to the maximum stroke, the protective cover body is in the folded state; when the telescopic rod of the driving unit is retracted, the protective cover body is pulled and rotated to the unfolded state.

[0015] Preferably, the locking of the protective cover body at any position within the overturning stroke is realized through the self-locking function of the screw rod transmission pair.

[0016] Compared with the related art, the single-drive 180-degree overturning mechanism for a protective cover provided by the application has the following beneficial effects:

[0017] The single-drive 180-degree overturning mechanism for a protective cover provided by the application efficiently converts the linear motion of the push rod into the 180-degree rotary motion of the protective cover through the planar linkage mechanism composed of the electric push rod, the triangular rod and the adjustable connecting rod, and has a compact structure and low cost. The self-locking characteristic of the ladder-type screw rod transmission is utilized to reliably lock the protective cover at any position within the overturning stroke without additional braking or locking devices, effectively resist strong winds and has a high safety factor. The driving unit is integrated with a manual interface, which can be operated manually in the case of power failure or other emergency situations, thereby ensuring the emergency usability of the mechanism. The adjustable connecting rod allows fine adjustment of the mechanism to compensate for manufacturing and installation errors, thereby ensuring smooth operation and accurate position of the mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic diagram of the folded state of the application;

[0019] Figure 2 FIG. 2 is a structural schematic diagram of the unfolded state of the application;

[0020] Figure 3 FIG. 3 is a sectional structural schematic diagram of the driving unit of the application;

[0021] Figure 4 FIG. 4 is a structural schematic diagram of the triangular rod of the application;

[0022] Figure 5 FIG. 5 is a structural schematic diagram of the adjustable connecting rod of the application;

[0023] Figure 6 FIG. 6 is a top view of the folded state of the application;

[0024] Figure 7 FIG. 7 is a top view of the unfolded state of the application.

[0025] The following are the labeling elements in the diagram: 1. Fixing frame; 2. Protective cover body; 3. Drive unit; 4. Triangular rod; 5. Adjustable connecting rod; 6. First support; 7. Second support; 8. Third support; 31. Motor; 32. Reducer; 33. Manual interface; 34. Trapezoidal lead screw; 35. Lead screw nut; 36. Telescopic rod; 37. Outer cylinder; 38. Gear transmission mechanism; 41. Hinge seat; 42. Rod body; 43. First mounting ear; 44. Second mounting ear; 51. First connecting rod; 52. First fastening nut; 53. Double-ended screw; 54. Second fastening nut; 55. Second connecting rod. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1 to 5 As shown, this embodiment provides a single-drive 180-degree flipping mechanism for a protective cover.

[0029] The mechanism includes a fixed frame 1 as a basic support structure. A protective cover body 2 is connected to the fixed frame 1 via a hinge (not shown separately in the figure), allowing the protective cover body 2 to rotate about the hinge axis.

[0030] The driving part is a driving unit 3, which in this embodiment is an electric push rod mechanism. The tail end of the driving unit 3 (i.e., the end of the outer cylinder 37) is hinged to the fixed frame 1 through the first support 6 to form a first rotating pair. The head end of the driving unit 3 (i.e., the end of the telescopic rod 36) is connected to the triangular rod 4.

[0031] A triangular rod 4 serves as a motion conversion hub, and its structure includes a hinge seat 41 fixed to the fixed frame 1 via a second support 7 and a rod body 42. The middle part of the rod body 42 is hinged to the hinge seat 41, thereby allowing the rod body 42 to swing. The rod body 42 has a middle hinge portion connected to the hinge seat 41, a first extended connecting portion connected to the telescopic end of the drive unit 3, and a second extended connecting portion connected to one end of the adjustable connecting rod 5. A first mounting ear 43 is provided on the first extended connecting portion, and a second mounting ear 44 is provided on the second extended connecting portion.

[0032] An adjustable connecting rod 5 is connected between the triangular rod 4 and the protective cover body 2. One end of the adjustable connecting rod 5 is hinged to the second mounting lug 44 of the triangular rod 4 through a fixed shaft, and the other end of the adjustable connecting rod 5 is hinged to the protective cover body 2 through the third support 8.

[0033] Basic working principle: the telescopic rod 36 of the driving unit 3 is extended or retracted, driving the triangular rod 4 to swing around the hinged point of the middle of the triangular rod 4 and the fixed frame 1, and the swing of the triangular rod 4 pushes or pulls the protective cover body 2 through the adjustable connecting rod 5, so that the protective cover body 2 is turned around the hinged point of the protective cover body 2 and the fixed frame 1 to realize a 0-180 degree overturning movement. When the telescopic rod 36 of the driving unit 3 is extended to the maximum stroke, the protective cover body 2 is in the Figure 1 state shown; when the telescopic rod 36 of the driving unit 3 is retracted, the protective cover body 2 is pulled and rotated to the Figure 2 state shown.

[0034] Example two

[0035] Based on example one, as shown in Figure 3 , the driving unit 3 includes a motor 31, a speed reducer 32, an outer cylinder 37, a telescopic rod 36, and a screw rod transmission pair composed of a ladder type screw rod 34 and a screw rod nut 35. The ladder type screw rod 34 is rotatably installed in the outer cylinder 37 through a bearing. The screw rod nut 35 is sleeved on the ladder type screw rod 34 and is fixedly connected with the telescopic rod 36. After the motor 31 is started, the power is reduced and the torque is increased through the speed reducer 32, and the ladder type screw rod 34 is directly or indirectly driven to rotate. The rotational movement of the ladder type screw rod 34 is converted into the linear movement of the telescopic rod 36 along the axis of the outer cylinder 37 through the screw rod nut 35.

[0036] The key of this embodiment is that the transmission screw rod is a ladder type screw rod 34. By using the inherent friction self-locking property of the ladder type screw rod 34, when the motor stops driving, the reverse force (such as the force of strong wind trying to blow the protective cover) applied on the telescopic rod 36 cannot drive the screw rod nut 35 to rotate the ladder type screw rod 34 in the opposite direction. This property enables the protective cover body 2 to be reliably locked at any position within the overturning stroke without additional braking devices, realizing the safety function of "locking when power off".

[0037] Example three

[0038] Based on example two, referring to Figure 3 , the driving unit 3 further includes a gear transmission mechanism 38. The gear transmission mechanism 38 includes a driving gear and a driven gear meshing with each other. The driven gear is sleeved and fixed on the input end of the ladder type screw rod 34, and the driving gear is sleeved and fixed on the output shaft of the speed reducer 32. The gear transmission can further increase the torque and change the direction of power transmission, making the structural layout more reasonable.

[0039] More importantly, the drive unit 3 also includes a manual interface 33. The manual interface 33 is coaxially arranged with the driving gear. The manual interface 33 can be a hexagonal shaft head, a cross hole or a structure that can be engaged by a wrench. When power failure or motor failure occurs, the operator can use a tool such as a manual crank to insert the manual interface 33 and manually rotate the driving gear, thereby driving the entire transmission system to move, extending or retracting the telescopic rod 36, and achieving manual opening and closing of the protective cover, greatly improving the emergency support capability of the equipment.

[0040] Embodiment Four

[0041] This embodiment is based on any one of embodiments one to three, and optimizes the details of the triangular rod 4 and the adjustable connecting rod 5.

[0042] As shown in Figure 4 , in order to reduce friction, improve efficiency and prolong service life, a rolling bearing (such as a deep groove ball bearing) is installed in the hinge hole of the first mounting ear 43 and the second mounting ear 44 of the triangular rod 4.

[0043] As shown in Figure 5 , the specific structure of the adjustable connecting rod 5 includes a first connecting rod 51, a second connecting rod 55, a double-headed screw 53, a first fastening nut 52 and a second fastening nut 54. One end of the first connecting rod 51 and the second connecting rod 55 is respectively processed with an internal threaded hole and screwed on both ends of the double-headed screw 53. By rotating the double-headed screw 53, the length of the adjustable connecting rod 5 can be adjusted as a whole. After adjusting to the required length, the first fastening nut 52 is tightened to abut against the end face of the first connecting rod 51, and the second fastening nut 54 is tightened to abut against the end face of the second connecting rod 55, and the pre-tightening force generated by the two fastening nuts can effectively prevent the adjustable connecting rod 5 from loosening during operation, ensuring the stability of the length of the adjustable connecting rod 5. This design can accurately compensate for manufacturing and installation errors, ensuring the accuracy of the movement trajectory of the mechanism.

[0044] As shown in Figure 6 and Figure 7 , the length, width and height of the protective cover 2 are 2350mm*1200mm*6000mm, the length, width and height of the fixed frame 1 are 12000mm*1200mm*6000mm (not fully drawn in the figure), the distance between the two hinge points of the drive unit 3 in the folded state is 2292mm, the distance between the two hinge points of the drive unit 3 in the unfolded state is 1490mm, the length of the adjustable connecting rod is 600mm, and the distances between the three hinge points of the triangular rod 4 are 600mm, 512mm and 450mm respectively.

[0045] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed by the present application can be easily conceived by those skilled in the art, and shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A single drive 180 degree flip mechanism for a protective boot, characterized by: The device comprises a fixed frame, a protective cover body, a driving unit, a triangular rod and an adjustable connecting rod; the protective cover body is hinged to the fixed frame; one end of the driving unit is hinged to the fixed frame, and the other end of the driving unit is hinged to one end of the triangular rod; the middle part of the triangular rod is hinged to the fixed frame; one end of the adjustable connecting rod is hinged to the other end of the triangular rod, and the other end of the adjustable connecting rod is hinged to the protective cover body; the driving unit is an electric push rod mechanism, and the electric push rod mechanism comprises a screw transmission pair.

2. A single drive 180 degree inversion mechanism for a protective cover according to claim 1, characterized in that: 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 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 telescopic rod along the axis of the outer cylinder.

3. A single drive 180 degree inversion mechanism for a protective boot according to claim 2, characterized in that: The electric push rod mechanism further comprises a gear transmission mechanism, and the gear transmission mechanism comprises a driving gear and a driven gear which are engaged with each other; the driven gear is fixedly sleeved on the input end of the ladder type screw rod, and the driving gear is fixedly sleeved on the output shaft of the speed reducer.

4. A single drive 180 degree inversion mechanism for a protective boot according to claim 3, characterized in that: 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 rotation of the driving gear by a manual tool in a power-off state.

5. A single drive 180 degree flip over mechanism for a protective boot according to claim 1, characterized in that: The triangular rod comprises a rod body and a hinged seat; the hinged seat is fixedly arranged on the fixed frame; the middle part of the rod body is hinged to the hinged seat; the rod body is provided with a middle hinged part connected with the hinged seat, a first outer extension connecting part connected with the telescopic end of the driving unit, and a second outer extension connecting part connected with one end of the adjustable connecting rod; the first outer extension connecting part is provided with a first mounting ear, and the second outer extension connecting part is provided with a second mounting ear.

6. A single drive 180 degree inversion mechanism for a protective boot according to claim 5, wherein: Bearings are installed in the hinged holes of the first mounting ear and the second mounting ear.

7. A single drive 180 degree flip over mechanism for a protective boot according to claim 1, characterized in that: The adjustable connecting rod comprises a first connecting rod, a second connecting rod, a double-headed screw rod, a first fastening nut and a second fastening nut; the first connecting rod and the second connecting rod are respectively provided with internal thread holes; the internal thread hole of the first connecting rod is screwed with one end of the double-headed screw rod, and the internal thread hole of the second connecting rod is screwed with the other end of the double-headed screw rod; the first fastening nut is screwed on the double-headed screw rod and abuts against the end face of the first connecting rod, and the second fastening nut is screwed on the double-headed screw rod and abuts against the end face of the second connecting rod.

8. A single drive 180 degree inversion mechanism for a protective boot according to claim 2, characterized in that: The telescopic rod drives the triangular rod to swing around the hinged point of the triangular rod and the fixed frame, the swinging of the triangular rod drives the adjustable connecting rod to move, and the adjustable connecting rod drives the protective cover body to perform a 0-180 degree overturning motion around the hinged point of the protective cover body and the fixed frame.

9. A single drive 180 degree inversion mechanism for a protective boot according to claim 8, wherein: When the telescopic rod of the driving unit is extended to the maximum stroke, the protective cover body is in the folded state; when the telescopic rod of the driving unit is retracted, the protective cover body is pulled and rotated to the unfolded state.

10. A single drive 180 degree flip over mechanism for a protective cover according to claim 1, characterized in that: 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.

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