An auxiliary tool for assembly and disassembly in narrow spaces for substation maintenance based on an electric push rod and its use method

Abstract

The present invention discloses an electric push rod-based auxiliary tool for assembly and disassembly in narrow spaces for substation maintenance. The tool comprises a main frame, a support frame, and a posture control mechanism. Connecting shafts are provided at both ends of the main frame, each connected to a support frame. A posture control mechanism is provided between the main frame and the support frame, allowing for an adjustable angle between the two. This tool addresses the existing problem of a lack of suitable tools for maintenance in narrow spaces.

Description

Technical Field

[0001] The invention relates to an electric push rod-based auxiliary tool for assembling and disassembling in a narrow space for substation maintenance and a use method thereof, belonging to the technical field of auxiliary tools for assembling and disassembling in a narrow space. Background Art

[0002] When installing and removing submersible oil pumps and disconnector operating mechanisms in substation main transformers, they are large and heavy. Using a jack to lift them is difficult due to the lack of suitable lifting points due to their proximity to the ground. Furthermore, using a platform lift cannot easily position them under the narrow fittings. Furthermore, the heavy weight of the disassembled mechanisms makes it difficult for maintenance personnel to lift or transport them. Currently, there are no suitable tools suitable for maintenance in confined spaces. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an auxiliary tool for assembly and disassembly in narrow space of substation maintenance based on an electric push rod and a method of use, so as to overcome the shortcomings of the prior art.

[0004] The technical solution of the present invention is: an auxiliary tool for assembly and disassembly in narrow space for substation maintenance based on an electric push rod, comprising a main frame, a support frame and a posture control mechanism;

[0005] The two ends of the main frame are provided with connecting shafts, and a supporting frame is connected to the connecting shafts respectively. A posture control mechanism is provided between the main frame and the supporting frame, and the posture control mechanism can make the angle between the main frame and the supporting frame adjustable.

[0006] Furthermore, the main frame and the support frame are ladder-shaped structures.

[0007] Furthermore, universal wheels are provided on both sides of the end portion of the support frame away from the main frame body.

[0008] Specifically, the universal wheel includes a steering shaft and a wheel body, the wheel body is rotatably connected to one end of the steering shaft, the rotating shaft of the wheel body is perpendicular to the steering shaft, the rotating shaft of the wheel body is located on the side of the steering shaft and the center of gravity of the universal wheel is located on the side of the wheel rotating shaft outside the central axis of the steering shaft, and the wheel body is rotatably connected to the end of the support frame through the steering shaft.

[0009] Furthermore, the posture control mechanism includes a remote controller, a controller, a first rotating shaft, a second rotating shaft and an electric telescopic rod;

[0010] The first rotating shaft is fixedly connected to the main frame, and the first rotating shaft is parallel to the connecting rotating shaft;

[0011] The second rotating shaft is rotatably connected to the support frame, and the support frame is parallel to the connecting rotating shaft;

[0012] The electric telescopic rod is rotatably connected to the first rotating shaft and the second rotating shaft respectively. The electric telescopic rod is electrically connected to the controller, and the controller is electrically connected to the remote controller.

[0013] Furthermore, the second rotating shaft includes a main shaft and a secondary shaft, the main shaft includes two, and the two main shafts are fixedly connected to both ends of the secondary shaft respectively;

[0014] The main shaft is rotatably connected to the support frame through an angle limiter. The angle limiter has an angle limit range of -90°~90°. When the angle limiter is -90°, the secondary shaft is limited to the side of the support frame away from the electric telescopic rod, and the plane where the secondary shaft and the main shaft are located is perpendicular to the support frame; when the angle limiter is 90°, the secondary shaft is limited to the side of the support frame close to the electric telescopic rod, and the plane where the secondary shaft and the main shaft are located is perpendicular to the support frame.

[0015] The secondary shaft is parallel to the primary shaft but does not overlap with it. The second rotating shaft is rotationally connected to the electric telescopic rod through the secondary shaft.

[0016] Furthermore, the first rotating shaft is adjustably connected to the main frame along the length direction of the main frame through a position adjustment mechanism.

[0017] Specifically, the position adjustment mechanism includes a guide hole, a guide rod, a connecting plate, a ball screw, a stepping motor and a fixed bearing;

[0018] The guide holes include two, which are respectively arranged on both sides of the main frame. The length directions of the two guide holes are parallel to the length direction of the main frame. The length of the guide rod matches the width of the main frame. The guide rod passes through the two guide holes so that the two ends of the guide rod are respectively located on both sides of the main frame.

[0019] The guide rods include two, each end of which is fixedly connected to a connecting plate, and the side of each connecting plate away from the guide rod is fixedly connected to the nut of the ball screw, and the nut of the ball screw is parallel to the length direction of the main frame;

[0020] The lead screw of the ball screw is threadedly connected to the nut of the ball screw, one end of the ball screw is fixedly connected to the rotating shaft of the stepping motor, and the other end of the ball screw is rotatably connected to the fixed bearing;

[0021] The fixed bearing is fixedly connected to the main frame;

[0022] The stepper motor is fixedly connected to the main frame, and the stepper motor is electrically connected to the controller.

[0023] A method for using the tool, comprising:

[0024] For lifting, place the end of the support frame away from the main frame on the ground, extend the electric telescopic rod to make the main frame lower than the object to be lifted, and move the main frame to just below the object to be lifted. Retract the electric telescopic rod to make the main frame bear the weight of the object to be lifted;

[0025] Used as a human body support, place the end of the support frame away from the main frame and touch the ground. Place the main frame just below the part to be inspected. When a person lies on the main frame, the electric telescopic rod retracts to raise the person's height, and extends to lower the person's height. The different telescopic lengths of the electric telescopic rods at both ends of the main frame can change the inclination angle of the main frame or adapt to uneven ground.

[0026] As a transfer trolley, place the object to be lifted on the main frame, and use the universal wheels on the two support frames in contact with the ground as wheels;

[0027] To make a ladder, the electric telescopic rod is extended so that the support frame is parallel to the main frame.

[0028] The beneficial effects of the present invention are: compared with the prior art,

[0029] 1) When the location of the device to be repaired is too narrow, the present invention increases the angle between the main frame and the support frame through the posture control mechanism, thereby lowering the height of the main frame to adapt to the narrow space. Since the angle between the main frame and the support frame can be controlled by the posture control mechanism to make the height of the main frame variable, the present device can be used to lift the device to be repaired during disassembly and installation, so that the height of the device to be repaired can be raised or lowered to meet the repair requirements;

[0030] 2) This device can also be used as a human body support. Place the end of the support frame away from the main frame and touch the ground. Place the main frame directly below the part to be inspected. When a person lies on the main frame, the electric telescopic rod extends to raise the height of the person, and contracts to lower the height of the person. The different telescopic lengths of the electric telescopic rods at both ends of the main frame can change the inclination angle of the main frame or adapt to uneven ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 for Figure 1 Partial view at point A in the middle;

[0033] Figure 3 for Figure 1 Partial view at point B in the middle;

[0034] Figure 4 is another schematic diagram of the three-dimensional structure of the present invention;

[0035] Figure 5 for Figure 4 Partial view at point C in the middle;

[0036] Figure 6 for Figure 4 Partial view at point D in the middle;

[0037] Figure 7 An exploded view of the present invention;

[0038] Figure 8 It is a circuit connection block diagram of the present invention. DETAILED DESCRIPTION

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Implementation Example 1: Reference Figures 1 to 8 This embodiment adopts an auxiliary tool for assembly and disassembly in narrow spaces for substation maintenance based on an electric push rod, including a main frame 1, a support frame 2 and a posture control mechanism; connecting shafts 1-2 are provided at both ends of the main frame 1, and a support frame 2 is connected to the connecting shafts 1-2 respectively, and a posture control mechanism is provided between the main frame 1 and the support frame 2, and the posture control mechanism can make the angle between the main frame 1 and the support frame 2 adjustable.

[0041] When the location of the device to be repaired is too narrow, the angle between the main frame 1 and the support frame 2 is increased by the posture control mechanism, so that the height of the main frame 1 is lowered to adapt to the narrow space. Since the angle between the main frame 1 and the support frame 2 is controlled by the posture control mechanism, the height of the main frame 1 can be changed. Therefore, this device can be used to lift the device to be repaired during disassembly and installation, so that the height of the device to be repaired can be raised or lowered to meet the maintenance requirements.

[0042] This device can also be used as a human body support. The support frame 2 is placed on the ground with the end away from the main frame 1, and the main frame 1 is placed directly below the part to be inspected. A person lies on the main frame 1, and the electric telescopic rods 4-6 are extended to raise the height of the human body, and the electric telescopic rods 4-6 are retracted to lower the height of the human body. The different telescopic lengths of the electric telescopic rods 4-6 at both ends of the main frame 1 can change the inclination angle of the main frame 1 or adapt to uneven ground.

[0043] Furthermore, the main frame 1 and the support frame 2 are ladder-like structures.

[0044] When the electric telescopic rods 4-6 are extended to make the support frame 2 parallel to the main frame, the device can be used as a ladder.

[0045] Furthermore, universal wheels 3 are provided on both sides of the end of the support frame 2 away from the main frame body 1.

[0046] Through the universal wheels 3, the device can be used as a mobile platform for transporting objects.

[0047] When there is a higher rack on one side of the maintenance location and no rack on the other side, if the ground is slippery, the support frame 2 on one side is placed on the rack. This may cause the support frame 2 to slide down from the rack to a lower position. To solve this problem, in this embodiment, the universal wheel 3 includes a steering shaft 3-1 and a wheel body 3-2. The wheel body 3-2 is rotatably connected to one end of the steering shaft 3-1. The rotation axis of the wheel body 3-2 is perpendicular to the steering shaft 3-1. The rotation axis of the wheel body 3-2 is located on the side of the steering shaft 3-1, and the center of gravity of the universal wheel 3 is located on the side of the wheel rotation axis outside the center axis of the steering shaft 3-1. The wheel body 3-2 is rotatably connected to the end of the support frame 2 via the steering shaft 3-1.

[0048] Here, the rotating shaft of the wheel body 3-2 is located on the side of the steering shaft 3-1 and the center of gravity of the universal wheel 3 is located on the side of the wheel rotating shaft outside the central axis of the steering shaft 3-1, so that the rotating shaft of the wheel body 3-2 is always facing downward under the action of gravity, so that the wheel body 3-2 can be used as a limiting mechanism to prevent the rotating shaft from sliding downward.

[0049] Furthermore, the posture control mechanism includes a remote control 6, a controller 5, a first rotating shaft 1-1, a second rotating shaft 2-1 and an electric telescopic rod 4-6; the first rotating shaft 1-1 is fixedly connected to the main frame 1, and the first rotating shaft 1-1 is parallel to the connecting rotating shaft 1-2; the second rotating shaft 2-1 is rotatably connected to the support frame 2, and the support frame 2 is parallel to the connecting rotating shaft 1-2; the electric telescopic rod 4-6 is rotatably connected to the first rotating shaft 1-1 and the second rotating shaft 2-1 respectively, the electric telescopic rod 4-6 is electrically connected to the controller 5, and the controller 5 is electrically connected to the remote control 6.

[0050] Here, a signal is sent to the controller 5 via the remote controller 6 to control the extension and retraction of the electric telescopic rods 4-6, so that the angle between the main frame 1 and the support frame 2 can be adjusted.

[0051] When unfolded, the closer the angle between the support frame 2 and the main frame 1 is to 180 degrees, the smaller the angle between the electric telescopic rod 4-6 and the support frame 2 is, so that the torque of the electric telescopic rod 4-6 to rotate the support frame 2 is smaller. When the space at the location to be repaired is very narrow, it is possible that the device cannot lift the device to be repaired.

[0052] After folding, the closer the angle between the support frame 2 and the main frame 1 is to 0 degrees, the closer the angle between the electric telescopic rod 4-6 and the support frame 2 is to 180 degrees, making the torque of the electric telescopic rod 4-6 to rotate the support frame 2 smaller, which may easily make the support frame 2 difficult to unfold when it is unfolded again or easily squeeze the second rotating shaft 2-1.

[0053] In order to solve this problem, in this embodiment, further, the second rotating shaft 2-1 includes a main shaft 2-1-1 and a secondary shaft 2-1-2, the main shaft 2-1-1 includes two, and the two main shafts 2-1-1 are fixedly connected to the two ends of the secondary shaft 2-1-2; the main shaft 2-1-1 is rotatably connected to the support frame 2 through an angle limiter 2-2, and the angle limiter 2-2 has an angle limit range of -90°~90°. When -90°, the angle limiter 2-2 limits the secondary shaft 2-1-2 to The support frame 2 is away from the side of the electric telescopic rod 4-6, and the plane where the secondary axis 2-1-2 and the main axis 2-1-1 are located is perpendicular to the support frame 2; when the angle is 90°, the angle limiter 2-2 limits the secondary axis 2-1-2 to the side of the support frame 2 close to the electric telescopic rod 4-6, and the plane where the secondary axis 2-1-2 and the main axis 2-1-1 are located is perpendicular to the support frame 2; the secondary axis 2-1-2 is parallel to the main axis 2-1-1 but does not overlap, and the second rotating shaft 2-1 is rotationally connected to the electric telescopic rod 4-6 through the secondary axis 2-1-2.

[0054] As the angle between the support frame 2 and the main frame 1 approaches 180 degrees, the electric telescopic rod 4-6 contracts, pulling the secondary axis 2-1-2 of the second rotating shaft 2-1 to rotate around the primary axis 2-1-1. Under the restriction of the angle limiter 2-2, the plane where the secondary axis 2-1-2 and the primary axis 2-1-1 lie is perpendicular to the support frame 2. As a result, the angle between the electric telescopic rod 4-6 and the support frame 2 approaches 90 degrees, and the same pulling force can provide greater torque, thereby improving the lifting capacity of the device.

[0055] Although the electric telescopic rod 4-6 still has the problem of small torque for rotating the support frame 2 after folding, the extension of the electric telescopic rod 4-6 during the unfolding process will push the secondary shaft 2-1-2 to rotate around the main shaft 2-1-1 until the angle with the support frame 2 is close to -90°. At this time, the angle between the electric telescopic rod 4-6 and the support frame 2 will approach 90°, thereby increasing the torque of the electric telescopic rod 4-6 for rotating the support frame 2, making it easier to unfold the support frame 2 and the main frame 1, and reducing the possibility of damage to the second rotating shaft 2-1.

[0056] Since the travel of the electric telescopic rod 4-6 is limited, the angle between the support frame 2 and the main frame 1 is limited. In order to solve this problem, in this embodiment, the first rotating shaft 1-1 is further adjustable along the length direction of the main frame 1 through a position adjustment mechanism. Connected to the main frame 1.

[0057] Under the electric telescopic rod 4-6 with the same stroke, adjusting the first position close to the end of the main frame 1 can increase the upper limit of the angle between the support frame 2 and the main frame 1, and adjusting the first position close to the middle of the main frame 1 can reduce the lower limit of the angle between the support frame 2 and the main frame 1.

[0058] Specifically, the position adjustment mechanism includes a guide hole 4-7, a guide rod 4-5, a connecting plate 4-1, a ball screw 4-2, a stepping motor 4-3 and a fixed bearing 4-4;

[0059] The guide holes 4-7 include two, and the two guide holes 4-7 are respectively arranged on both sides of the main frame 1. The length direction of the two guide holes 4-7 is parallel to the length direction of the main frame 1. The length of the guide rod 4-5 matches the width of the main frame 1. The guide rod 4-5 passes through the two guide holes 4-7 so that the two ends of the guide rod 4-5 are respectively located on both sides of the main frame 1;

[0060] The guide rod 4-5 includes two, and a connecting plate 4-1 is fixedly connected to each end of the guide rod 4-5. The side of each connecting plate 4-1 away from the guide rod 4-5 is fixedly connected to the nut of the ball screw 4-2, and the nut of the ball screw 4-2 is parallel to the length direction of the main frame 1;

[0061] The screw rod of the ball screw 4-2 is threadedly connected to the nut of the ball screw 4-2, one end of the ball screw 4-2 is fixedly connected to the rotating shaft of the stepping motor 4-3, and the other end of the ball screw 4-2 is rotatably connected to the fixed bearing 4-4;

[0062] The fixed bearing 4-4 is fixedly connected to the main frame 1;

[0063] The stepper motor 4 - 3 is fixedly connected to the main frame 1 , and the stepper motor 4 - 3 is electrically connected to the controller 5 .

[0064] Here, the stepper motor 4-3 drives the ball screw 4-2 to rotate, so that the nut of the ball screw 4-2 moves along the ball screw 4-2, thereby driving the connecting plate 4-1 to move along the length direction of the guide hole 4-7. The guide hole 4-7 and the guide rod 4-5 cooperate mainly to play a limiting role to prevent the first rotating shaft 1-1 from shaking, so that the moving direction of the first rotating shaft 1-1 has only one degree of freedom in the length direction of the guide hole 4-7.

[0065] A method for using the tool, comprising:

[0066] For lifting, place the end of the support frame 2 away from the main frame 1 on the ground, extend the electric telescopic rods 4-6 to make the main frame 1 lower than the object to be lifted, and move the main frame 1 to be directly under the object to be lifted. Retract the electric telescopic rods 4-6 to make the main frame 1 bear the weight of the object to be lifted;

[0067] As a human body support, place the end of the support frame 2 away from the main frame 1 and touch the ground. Place the main frame 1 just below the part to be inspected. When a person lies on the main frame 1, the electric telescopic rods 4-6 contract to raise the height of the person, and extend to lower the height of the person. The different telescopic lengths of the electric telescopic rods 4-6 at both ends of the main frame 1 can change the inclination angle of the main frame 1 or adapt to uneven ground.

[0068] As a transfer trolley, place the object to be lifted on the main frame 1, and use the universal wheels 3 on the two support frames 2 in contact with the ground as wheels;

[0069] To make a ladder, the electric telescopic rods 4-6 are extended so that the support frame 2 is parallel to the main frame.

[0070] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An auxiliary tool for assembly and disassembly in narrow spaces for substation maintenance based on an electric push rod, characterized in that: It comprises a main frame (1), a support frame (2) and a posture control mechanism; The main frame (1) is provided with connecting shafts (1-2) at both ends, and a support frame (2) is connected to each connecting shaft (1-2). A posture control mechanism is provided between the main frame (1) and the support frame (2), and the posture control mechanism can make the angle between the main frame (1) and the support frame (2) adjustable; Universal wheels (3) are provided on both sides of the end of the support frame (2) away from the main frame body (1); The posture control mechanism comprises a remote controller (6), a controller (5), a first rotating shaft (1-1), a second rotating shaft (2-1), and an electric telescopic rod (4-6); The first rotating shaft (1-1) is adjustably connected to the main frame (1) along the length direction of the main frame (1) via a position adjustment mechanism, and the first rotating shaft (1-1) is parallel to the connecting rotating shaft (1-2); The second rotating shaft (2-1) is rotatably connected to the support frame (2), and the support frame (2) is parallel to the connecting rotating shaft (1-2); The electric telescopic rod (4-6) is rotatably connected to the first rotating shaft (1-1) and the second rotating shaft (2-1), the electric telescopic rod (4-6) is electrically connected to the controller (5), and the controller (5) is electrically connected to the remote control (6); The second rotating shaft (2-1) includes a main shaft (2-1-1) and a secondary shaft (2-1-2), the main shaft (2-1-1) includes two main shafts, and the two main shafts (2-1-1) are respectively fixedly connected to the two ends of the secondary shaft (2-1-2); The main shaft (2-1-1) is rotatably connected to the support frame (2) through an angle limiter (2-2), and the angle limiter (2-2) has an angle limit range of -90° to 90°. When the angle limiter (2-2) is -90°, the secondary shaft (2-1-2) is limited to the side of the support frame (2) away from the electric telescopic rod (4-6), and the plane where the secondary shaft (2-1-2) and the main shaft (2-1-1) are located is perpendicular to the support frame (2); when the angle limiter (2-2) is 90°, the secondary shaft (2-1-2) is limited to the side of the support frame (2) close to the electric telescopic rod (4-6), and the plane where the secondary shaft (2-1-2) and the main shaft (2-1-1) are located is perpendicular to the support frame (2); The secondary shaft (2-1-2) is parallel to but not coincident with the primary shaft (2-1-1), and the second rotating shaft (2-1) is rotationally connected to the electric telescopic rod (4-6) via the secondary shaft (2-1-2); The position adjustment mechanism comprises a guide hole (4-7), a guide rod (4-5), a connecting plate (4-1), a ball screw (4-2), a stepping motor (4-3) and a fixed bearing (4-4); The guide holes (4-7) include two guide holes (4-7), which are respectively arranged on both sides of the main frame (1). The length directions of the two guide holes (4-7) are parallel to the length direction of the main frame (1). The length of the guide rod (4-5) matches the width of the main frame (1). The guide rod (4-5) passes through the two guide holes (4-7) so that the two ends of the guide rod (4-5) are respectively located on both sides of the main frame (1). The guide rods (4-5) include two, each end of the guide rods (4-5) is fixedly connected to a connecting plate (4-1), and the side of each connecting plate (4-1) away from the guide rods (4-5) is fixedly connected to the nut of the ball screw (4-2), and the nut of the ball screw (4-2) is parallel to the length direction of the main frame (1); The screw rod of the ball screw (4-2) is threadedly connected to the nut of the ball screw (4-2), one end of the ball screw (4-2) is fixedly connected to the rotating shaft of the stepping motor (4-3), and the other end of the ball screw (4-2) is rotatably connected to the fixed bearing (4-4); The fixed bearing (4-4) is fixedly connected to the main frame (1); The stepper motor (4-3) is fixedly connected to the main frame (1), and the stepper motor (4-3) is electrically connected to the controller (5).

2. The electric push rod-based auxiliary tool for substation maintenance in narrow spaces according to claim 1 is characterized in that: The main frame (1) and the support frame (2) are ladder-shaped structures.

3. The electric push rod-based auxiliary tool for substation maintenance in narrow spaces according to claim 1 is characterized in that: The universal wheel (3) comprises a steering shaft (3-1) and a wheel body (3-2), the wheel body (3-2) being rotatably connected to one end of the steering shaft (3-1), the rotation axis of the wheel body (3-2) being perpendicular to the steering shaft (3-1), the rotation axis of the wheel body (3-2) being located on the side of the steering shaft (3-1), and the center of gravity of the universal wheel (3) being located on the side of the wheel rotation axis outside the central axis of the steering shaft (3-1), and the wheel body (3-2) being rotatably connected to the end of the support frame (2) via the steering shaft (3-1).

4. A method for using the tool according to claim 1, characterized in that: The method of use includes: For lifting, the support frame (2) is placed away from the end of the main frame (1) and placed on the ground, the electric telescopic rod (4-6) is extended so that the height of the main frame (1) is lower than the object to be lifted, and the main frame (1) is moved to be directly below the object to be lifted, and the electric telescopic rod (4-6) is retracted so that the main frame (1) bears the weight of the object to be lifted; The invention is used as a human body support, wherein the end of the support frame (2) is placed away from the main frame (1) and the main frame (1) is placed directly below the part to be inspected. A person lies on the main frame (1), and the electric telescopic rod (4-6) is retracted to raise the height of the person, and the electric telescopic rod (4-6) is extended to lower the height of the person. The electric telescopic rods (4-6) at both ends of the main frame (1) have different telescopic lengths so that the main frame (1) can change its tilt angle or adapt to uneven ground. As a transfer trolley, the object to be lifted is placed on the main frame (1), and the universal wheels (3) on the two support frames (2) are in contact with the ground and used as wheels; To make a ladder, the electric telescopic rods (4-6) are extended so that the support frame (2) is parallel to the main frame.

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