A low-speed engine piston head lifting tool with automatic calibration and positioning

Abstract

The present invention relates to a low-speed engine piston head lifting tool with automatic calibration and positioning, comprising a base plate and a lifting rod located on the upper surface at the center of the base plate, a rotating seat is arranged above the base plate, and at least three cantilevers are evenly distributed on the outer wall of the rotating seat in the radial direction. The tool is provided with a first motor, a second motor, a slider, and a telescopic slide rod to cooperate with each other, so that the piston head body has an automatic calibration and positioning function when it is fixed before lifting. An H-shaped blocking rod is also provided to limit the slide rod, and the slide rod is automatically limited after entering the slot to prevent the slide rod from moving back during the lifting process. The H-shaped blocking rod has an automatic start and automatic reset function, and no additional manual operation is required. The positioning, fixing, releasing, and resetting functions of the tool are completed by controlling the start and stop of the first motor and the second motor.

Description

Technical Field

[0001] The invention belongs to the technical field of marine low-speed machining equipment, and in particular relates to a low-speed machine piston head lifting tool with automatic calibration and positioning. Background Art

[0002] Low-speed engines, also known as low-speed diesel engines, are mainly used in ocean-going ships. Due to their large size, their components need to be lifted by cranes during assembly, inspection and maintenance. The piston head is generally lifted by a lifting fixture. A groove is provided on the side surface of the piston head, and the claws enter the groove for lifting.

[0003] Chinese invention patent CN109132845A discloses a lifting tool for a marine low-speed engine piston assembly, including a lifting platform, a plurality of claw support beams extending horizontally outward around the lifting platform, and a plurality of claws. This invention patent has the following shortcomings: the claws lack an automatic calibration and positioning function. When lifting, the position of the claws needs to be manually adjusted, and manual operation is required to align the clamping slots. Summary of the invention

[0004] The purpose of the present invention is to provide a low-speed engine piston head lifting tool with automatic calibration and positioning function in order to solve the above problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A low-speed engine piston head lifting tool with automatic calibration and positioning, comprising a base plate and a suspension rod located on the upper surface at the center of the base plate, a rotating seat is arranged above the base plate, at least three cantilevers are evenly distributed on the outer wall of the rotating seat in a radial direction, a slider driven by a second motor is slidably arranged in the extension direction of the cantilever, two downward extension blocks are arranged on the bottom end surface of the slider, a sliding rod extending and retracting along the radial direction of the base plate is arranged between the two downward extension blocks, a limiting block is arranged on the surface of the sliding rod, a first spring is arranged between the limiting block and one of the downward extension blocks, and the first spring is used to push the sliding rod out so that the sliding rod is inserted into a slot provided on the surface of the piston head body;

[0007] A limiting mechanism is also provided inside the sliding block, and the limiting mechanism includes an H-shaped blocking rod that slides up and down, wherein the H-shaped blocking rod is lifted up by the slope of the triangular block, and a trigger rod for contacting the piston head body is provided at the bottom end of the triangular block, and the trigger rod is used to push the triangular block to slide and release the H-shaped blocking rod.

[0008] As a further optimization scheme of the present invention, the rotating seat is driven by a first motor arranged on the surface of the substrate, and the output shaft end of the first motor is provided with driving teeth. The surface of the rotating seat is provided with a gear ring corresponding to the driving teeth for driving the rotating seat to rotate and find the card slot.

[0009] As a further optimization solution of the present invention, a roller for reducing friction is provided on the contact surface between the rotating seat and the substrate to prevent the substrate from rotating due to reaction force.

[0010] As a further optimization scheme of the present invention, a through long groove is provided between the upper and lower surfaces of the cantilever for the sliding of the slider, and the second motor is provided at the end of the cantilever, and a threaded rod is provided at the output shaft end of the second motor. The surface of the slider is provided with threaded holes corresponding to the threaded rod to provide power to the slider. The slider is radially retracted along the substrate and can be automatically retracted without being aligned with the piston head body.

[0011] As a further optimization scheme of the present invention, a guide wheel in contact with the piston head body is provided on the lower surface of the end of the slide rod, and when the slide rod searches for the slot along the surface of the piston head body, the friction is reduced by the guide wheel.

[0012] As a further optimization scheme of the present invention, a contact switch is provided on the surface of one side of the slider close to the trigger rod, and the contact switch is electrically connected to the second motor. When the contact switch contacts the surface of the piston head body, a signal is sent to the controller of the second motor to stop the second motor from rotating.

[0013] As a further optimization scheme of the present invention, a rail groove for accommodating the trigger rod is provided on the surface of the slider, and a second spring connected to the end of the trigger rod is arranged inside the rail groove. The second spring is used to push the trigger rod so that the triangular block lifts the H-shaped blocking rod. The slider is also provided with a sliding groove for accommodating the triangular block and a groove for accommodating the H-shaped blocking rod, so that the H-shaped blocking rod has the function of automatic lifting and lowering. When the sliding rod is inserted into the slot, the H-shaped blocking rod automatically falls.

[0014] The beneficial effects of the present invention are:

[0015] 1) The present invention sets a first motor, a second motor, a slider, and a telescopic slide rod to cooperate with each other, so that the piston head body needs to automatically calibrate and position when it is fixed before lifting. First, the second motor and the slider can automatically align the substrate with the piston head body, and secondly, the first motor and the slide rod can realize the function of automatically finding the card slot;

[0016] 2) The present invention also provides an H-shaped blocking rod for limiting the sliding rod, automatically limiting the sliding rod after entering the slot, and preventing the sliding rod from moving back during the lifting process. The H-shaped blocking rod has the functions of automatic start and automatic reset, and no additional manual operation is required. The functions of positioning, fixing, releasing, and resetting of the tooling can be completed by only controlling the start and stop of the first motor and the second motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a top view of the present invention;

[0019] Figure 3 is a schematic diagram of the slider and its related components of the present invention;

[0020] Figure 4 The present invention Figure 3 Middle AA section view;

[0021] In the figure: 1, base plate; 2, suspension rod; 31, rotating seat; 32, first motor; 33, driving tooth; 34, gear ring; 35, roller; 41, cantilever; 42, slider; 43, second motor; 44, threaded rod; 45, lower extension block; 46, slide rod; 47, limit block; 48, first spring; 49, guide wheel; 51, trigger rod; 52, second spring; 53, contact switch; 54, slide groove; 55, triangular block; 56, profile groove; 57, H-type blocking rod; 6, piston head body; 61, slot. DETAILED DESCRIPTION

[0022] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] Example 1

[0024] like Figure 1-4 As shown, an automatic calibration and positioning low-speed engine piston head lifting tool includes a base plate 1 and a suspension rod 2 located on the upper surface at the center of the base plate 1, a rotating seat 31 is arranged above the base plate 1, and the rotating seat 31 is driven by a first motor 32 arranged on the surface of the base plate 1, and a driving tooth 33 is arranged at the output shaft end of the first motor 32, and a gear ring 34 meshing with the driving tooth 33 is arranged on the surface of the rotating seat 31, and a roller 35 for reducing friction is arranged on the contact surface between the rotating seat 31 and the base plate 1, and the rotating seat 31 is used to find the groove 61 on the surface of the piston head body 6.

[0025] The outer wall of the rotating seat 31 is evenly distributed with at least three cantilevers 41 in the radial direction, and a slider 42 driven by a second motor 43 is slidably provided in the extension direction of the cantilever 41. A long groove is provided between the upper and lower surfaces of the cantilever 41 for the slider 42 to slide, and the second motor 43 is provided at the end of the cantilever 41. A threaded rod 44 is provided at the output shaft end of the second motor 43, and a threaded hole corresponding to the threaded rod 44 is provided on the surface of the slider 42.

[0026] The slider 42 can be adapted to various diameters of the piston head body 6 and does not need to be aligned with the piston head body 6. After the substrate 1 falls, the slider 42 shrinks inward, automatically finds the piston head body 6, and automatically calibrates the position of the substrate 1, keeping the substrate 1 and the piston head body 6 on the same axis.

[0027] Two downward extension blocks 45 are provided on the bottom end surface of the slider 42, a slide rod 46 which is extended and retracted radially along the base plate 1 is provided between the two downward extension blocks 45, a limit block 47 is provided on the surface of the slide rod 46, a first spring 48 is provided between the limit block 47 and one of the downward extension blocks 45, and the first spring 48 is used to push the slide rod 46 out so that the slide rod 46 is inserted into the slot 61 opened on the surface of the piston head body 6.

[0028] The slide bar 46 is set as a gripper for inserting into the slot 61 as a lifting power. The telescopic slide bar 46 can automatically find the position of the slot 61. When the substrate 1 falls above the piston head body 6, the slider 42 contracts inward, so that the slide bar 46 rests on the surface of the piston head body 6 and is at the same height as the slot 61, but not aligned. Then, the rotating seat 31 is rotated to make the slide bar 46 rotate on the horizontal plane to find the slot 61, and it is automatically inserted after finding the slot 61.

[0029] During the lifting process, the sliding slide bar 46 is used as a force-bearing object. If the force-bearing surface is worn, the force-bearing angle is inclined, etc., the slide bar 46 is easily retracted by relying solely on the support of the first spring 48, resulting in serious consequences. In order to solve this risk, a limiting mechanism is also provided inside the slider 42. The limiting mechanism includes an H-shaped blocking rod 57 that slides up and down, which is used to clamp the limiting block 47 when the slide bar 46 is inserted into the slot 61, wherein the H-shaped blocking rod 57 is lifted up by the slope of the triangular block 55, and the bottom end of the triangular block 55 is provided with A trigger rod 51 is used to contact the piston head body 6, and the trigger rod 51 is used to push the triangular block 55 to slide and release the H-shaped blocking rod 57. A track groove for accommodating the trigger rod 51 is provided on the surface of the slider 42, and a second spring 52 connected to the end of the trigger rod 51 is provided inside the track groove. The second spring 52 is used to push the trigger rod 51 so that the triangular block 55 lifts the H-shaped blocking rod 57. The slider 42 is also provided with a slide groove 54 for accommodating the triangular block 55 and a groove 56 for accommodating the H-shaped blocking rod 57.

[0030] A guide wheel 49 in contact with the piston head body 6 is provided on the lower surface of the end of the slide rod 46 . When the slide rod 46 searches for the slot 61 along the surface of the piston head body 6 , the guide wheel 49 reduces friction.

[0031] A contact switch 53 is provided on one side surface of the slider 42 close to the trigger rod 51. The contact switch 53 is electrically connected to the second motor 43. When the contact switch 53 contacts the surface of the piston head body 6, a signal is sent to the controller of the second motor 43 to stop the second motor 43 from rotating.

[0032] It should be emphasized that before the substrate 1 is aligned with the piston head body 6, the contact switch 53 will first contact the piston head body 6, causing the corresponding second motor 43 to stop. Therefore, the control of all the second motors 43 is synchronized by the same controller, and only when all the contact switches 53 are pressed, the controller will control all the second motors 43 to stop. Therefore, before alignment, all the sliders 42 still retract inward to provide thrust to move the substrate 1 until all the contact switches 53 are triggered after alignment, and the second motors 43 stop running.

[0033] The specific implementation method is:

[0034] (1) First, the substrate 1 and the rotating seat 31 are slowly lowered by connecting the external crane to the suspension rod 2 so that the substrate 1 falls on the surface of the piston head body 6. This process does not require alignment. The second motor 43 drives the slider 42 to shrink inward synchronously. During the shrinking process, the position of the substrate 1 is automatically calibrated so that the substrate 1 and the piston head body 6 are on the same axis. After the substrate 1 is aligned with the piston head body 6, the slide rod 46 and the trigger rod 51 are both against the side wall surface of the piston head body 6 to shrink. After the trigger rod 51 retracts, the H-shaped blocking rod 57 loses support, but the slide rod 46 and the limit block 47 also retract, so the lower end of the H-shaped blocking rod 57 falls on the upper surface of the limit block 47 and does not slide down;

[0035] (2) Then the first motor 32 is started, driving the rotating seat 31 to rotate. When the slide bar 46 is aligned with the slot 61, the slide bar 46 rebounds and enters the slot 61. The limit block 47 also moves forward, and the H-shaped blocking rod 57 falls to limit the limit block 47 from moving back. At this time, the lifting operation can be performed;

[0036] Another situation may occur during the alignment of the base plate 1 and the piston head body 6. The slide rod 46 is not retracted, but is directly aligned with and enters the slot 61. Only the trigger rod 51 is retracted, and the H-shaped blocking rod 57 falls down after losing the support of the triangular block 55. The final result is the same, and the process of rotating the rotating seat 31 for positioning is omitted.

[0037] (3) When releasing, the second motor 43 runs in the reverse direction, the slider 42 slides directly outward, the trigger rod 51 is pushed out by the second spring 52, and the H-shaped blocking rod 57 is pushed up again by the triangular block 55 and automatically returns to the initial position, which is convenient for the next use.

[0038] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A low-speed engine piston head lifting tool with automatic calibration and positioning, comprising a base plate (1) and a suspension rod (2) located on the upper surface at the center of the base plate (1), characterized in that: A rotating seat (31) is arranged above the substrate (1), and at least three cantilevers (41) are evenly distributed on the outer wall of the rotating seat (31) in a radial direction. A slider (42) driven by a second motor (43) is slidably arranged in the extension direction of the cantilever (41), and two downward extension blocks (45) are arranged on the bottom end surface of the slider (42), and a sliding rod (46) extending and retracting along the radial direction of the substrate (1) is arranged between the two downward extension blocks (45), and a limiting block (47) is arranged on the surface of the sliding rod (46), and a first spring (48) is arranged between the limiting block (47) and one of the downward extension blocks (45), and the first spring (48) is used to push the sliding rod (46) out so that the sliding rod (46) is inserted into a slot (61) provided on the surface of the piston head body (6); A limiting mechanism is also provided inside the sliding block (42), and the limiting mechanism comprises an H-shaped blocking rod (57) that slides up and down, wherein the H-shaped blocking rod (57) is lifted up by the slope of the triangular block (55), and a trigger rod (51) for contacting the piston head body (6) is provided at the bottom end of the triangular block (55), and the trigger rod (51) is used to push the triangular block (55) to slide and release the H-shaped blocking rod (57).

2. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: The rotating seat (31) is driven by a first motor (32) arranged on the surface of the substrate (1); the output shaft end of the first motor (32) is provided with driving teeth (33); and the surface of the rotating seat (31) is provided with a gear ring (34) corresponding to and meshing with the driving teeth (33).

3. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: The contact surface between the rotating seat (31) and the base plate (1) is provided with a roller (35) for reducing friction.

4. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: A through long groove is provided between the upper and lower surfaces of the cantilever (41) for the slider (42) to slide, and the second motor (43) is provided at the end of the cantilever (41), a threaded rod (44) is provided at the output shaft end of the second motor (43), and a threaded hole corresponding to the threaded rod (44) is provided on the surface of the slider (42).

5. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: A guide wheel (49) in contact with the piston head body (6) is provided on the lower surface of the end of the slide rod (46).

6. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: A contact switch (53) is provided on a surface of one side of the slider (42) close to the trigger rod (51), and the contact switch (53) is electrically connected to the second motor (43).

7. The automatic calibration and positioning low-speed engine piston head lifting tool according to claim 1 is characterized by: The surface of the slider (42) is provided with a track groove for accommodating the trigger rod (51), and a second spring (52) connected to the end of the trigger rod (51) is arranged inside the track groove. The second spring (52) is used to push the trigger rod (51) so that the triangular block (55) lifts the H-shaped blocking rod (57). The slider (42) is also provided with a slide groove (54) for accommodating the triangular block (55) and a groove (56) for accommodating the H-shaped blocking rod (57).

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