Diesel engine piston assembly lifting tool and lifting method

Abstract

The present invention discloses a diesel engine piston assembly lifting tool and a lifting method. The lifting tool includes a lifting plate, a cross pin, a clamping ring group and several claws. The lifting plate is located on the top of the piston. The cross pin crosses through the center of the cross rib plate group of the lifting plate. The clamping ring group surrounds the radial upper part of the piston. The lifting plate is fixedly connected to the outer edge of the upper end of the clamping ring group by several bolts and nuts respectively, and is respectively fixed on one side of several claws in the radial direction of the clamping ring group and embedded in the piston groove at the corresponding position. The lifting method includes 1) installing the clamping ring group and inserting the clamping ring group into the upper end of the piston, 2) installing the claws, 3) installing the lifting plate, and 4) lifting the piston assembly. The lifting tool of the present invention has a compact structure, is easy to assemble, and has a simple and easy method. It can be used to lift the piston assemblies of various diesel engine models, thereby improving the versatility of the present invention and solving the problem that the existing piston assembly lifting tool cannot be used to lift the two-piston groove type piston assembly.

Description

Technical Field

[0001] The invention relates to a lifting tool for a vertical disc and round rod assembly, in particular to a lifting tool and method for a piston assembly of an internal combustion engine, and belongs to the technical field of special lifting tools. Background Art

[0002] Diesel engine piston assembly (hereinafter referred to as piston assembly) Figure 1 As shown, it includes a piston 10 and a piston rod 20 which are fixedly connected as a whole after assembly. The piston 10 needs to be lifted in an upright state with the piston 10 facing upwards, but there is no lifting hole on the top of the piston 10, and only a few piston grooves are set on the outer circumferential surface of the piston 10, so a special lifting tool is required for lifting. The existing special lifting tooling for piston assemblies adopts one set of lifting tooling for one diesel engine model, which is not universal. With the optimization and upgrading of the structure of new low-speed diesel engines, the structure of the piston assembly has also changed accordingly. The piston grooves have changed from the existing evenly distributed three to two symmetrically distributed. Therefore, the existing piston assembly lifting tooling is no longer suitable for the lifting of the two-piston groove piston assembly of the new diesel engine model. Summary of the invention

[0003] The purpose of the present invention is to provide a diesel engine piston assembly lifting tool and a lifting method which are compact in structure and have certain versatility.

[0004] The present invention is achieved through the following technical solutions:

[0005] A diesel engine piston assembly lifting tool, comprising a lifting plate, a cross pin, a clamping ring group and a plurality of claws, wherein the lifting plate is located on the top of the piston, and comprises a circular plate, a cross rib plate group and a plurality of reinforcing plates, wherein the circular plate center is provided with a through hole; the cross rib plate group comprises a group of trapezoidal rib plates and two groups of right-angled trapezoidal rib plates, wherein a group of trapezoidal rib plates comprises two trapezoidal rib plates arranged in parallel and vertically fixed on the upper side of the circular plate, each group of right-angled trapezoidal rib plates comprises two right-angled trapezoidal rib plates arranged in parallel and vertically fixed on the upper side of the circular plate, and a group of trapezoidal rib plates and two groups of right-angled trapezoidal rib plates are vertically intersected and fixed The piston is fixed in a cross shape, and several reinforcing plates are fixed on the lower side of the circular plate; the cross pin passes through the center hole of a group of trapezoidal rib plates, one end of the cross pin is locked by a cotter pin, and the crane hook hooks the middle of the cross pin; the clamping ring group surrounds the radial upper part of the piston, the radial outer edge of the circular plate and the upper end of the clamping ring group are fixedly connected by several bolts and nuts, which are respectively fixed on one side of several claws on the radial outer circle of the clamping ring group and embedded in the piston groove at the corresponding position, so that the crane hook lifts the piston assembly from top to bottom through the cross pin, the cross rib plate group, the clamping ring group and several claws.

[0006] The purpose of the present invention can also be further achieved by the following technical measures:

[0007] Furthermore, the circular plate has several waist-shaped holes with different circular diameters distributed radially and evenly in the inner and outer circles and arranged in a staggered manner, and the axes of the waist-shaped holes of the circular plate point to the center of the circular plate; the reinforcing plate is provided with a waist-shaped hole of the reinforcing plate, and the waist-shaped hole of the reinforcing plate is the same size and position as the waist-shaped hole of the circular plate, and is connected up and down; several evenly distributed bosses extend outward from the upper edge of the clamping ring group, and the lifting bolts are respectively vertically passed through the waist-shaped holes of the circular plate and the waist-shaped holes of the reinforcing plate and are screwed into the threaded holes of the bosses, and the circular plate is clamped by nuts screwed in the middle of the lifting bolts and located on the upper side of the circular plate and the lower side of the reinforcing plate, thereby fixing the circular plate and the clamping ring group into a whole.

[0008] Furthermore, the clamping ring group includes a pair of semicircular clamping ring bodies and an array of clamping bolts and nuts. Ear plates extend from both ends of the pair of semicircular clamping ring bodies. The inner diameter of the semicircular clamping ring bodies matches the outer diameter of the piston of the required lifting piston assembly. The clamping bolts that pass through the ear plates horizontally up and down and the nuts tightened on the ends of the clamping bolts are used to allow the clamping ring group to enclose the upper end of the piston, and the upper side of the clamping ring group is adjacent to several reinforcing plates on the lower side of the circular plate.

[0009] Furthermore, three radial slots are evenly distributed on the outer circumference of the clamping ring group, and another radial slot is arranged at 180° relative to one of the three radial slots; one side of the claw is a flat plate, and the contact surface between the one side of the flat plate and the outer circle of the clamping ring group is an arc surface, and the arc surface matches the outer circle of the clamping ring group; a positioning block matching the radial slot extends outward from the longitudinal center of the arc surface, and the positioning block passes through the radial slot and is embedded in the piston groove positioned at the corresponding position; the upper and lower sides of the flat plate are fixed to the outer circle of the clamping ring group by fastening screws respectively.

[0010] A method for lifting a diesel engine piston assembly lifting tool comprises the following steps:

[0011] 1) Install the clamp ring assembly and insert it into the upper end of the piston. Select the clamp ring assembly of the corresponding size according to the cylinder diameter of the diesel engine. First, connect the two ends of a pair of semicircular clamp ring bodies into one piece through clamp bolts and nuts, and do not tighten the nuts temporarily; use the several boss threaded holes on the top of the clamp ring assembly, install the lifting screws, and then lift the clamp ring assembly to the top of the piston assembly through the sling, then slowly lower the clamp ring assembly and carefully insert the clamp ring assembly into the upper end of the piston of the piston assembly; then rotate the clamp ring assembly according to the type of the piston groove to ensure that the radial slots of the semicircular clamp ring are aligned with the corresponding piston grooves; finally, tighten the nuts so that the clamp ring assembly encompasses the upper end of the piston;

[0012] 2) Install the claws. According to the number of piston grooves of the piston assembly, determine the corresponding number of claws to be used; then place the arc surface of the claw against the outer circle of the clamp ring group, and make the positioning block of the claw pass through the radial slot and embed it into the piston groove located at the corresponding position; then fix the claw to the clamp ring group with fastening screws on the upper and lower sides of the flat plate of the claw, and finally remove the eye screws and slings;

[0013] 3) Install the lifting plate. First, pass the cross pin horizontally through the center hole of a set of trapezoidal ribs. Then insert a split pin at one end of the cross pin to lock the cross pin. The split pin end is connected to the ring of another split pin end fixed on a set of right-angle trapezoidal ribs through a ring and a chain in sequence.

[0014] 4) To lift the piston assembly, first lift the lifting plate smoothly and safely above the piston assembly, then select the waist-shaped hole of the circular plate corresponding to the position of the clamping ring assembly, and screw the lifting bolts vertically through the waist-shaped hole of the circular plate and the waist-shaped hole of the reinforcing plate into the threaded hole of the boss, ensuring that the depth of several lifting bolts screwed into the boss is the same; and clamp the circular plate by screwing the nuts screwed in the middle of the lifting bolts and located on the upper side of the circular plate and the lower side of the reinforcing plate, so as to fix the circular plate and the clamping ring assembly into one; finally, hook the crane hook on the cross pin and lift the piston assembly to the required position.

[0015] The lifting tooling of the present invention has a compact structure, is easy to assemble, and is simple and easy to operate. A plurality of circular plate waist-shaped holes with different circular diameters and staggered inner and outer circles are evenly distributed radially on the circular plate, so that the lifting plate can be fixedly connected with clamping ring groups of different diameters, so that the lifting tooling of the present invention can be used to lift piston assemblies of various diesel engine models, thereby improving the versatility of the present invention. The present invention evenly distributes three radial slots on the outer circumference of the clamping ring group, and another radial slot is arranged at 180° relative to one of the three radial slots. That is, according to the number of piston grooves of the piston assembly, the corresponding number of claws can be determined, and the clamping ring group and the piston assembly can be connected into one by the claws. The present invention can be used for lifting the piston assembly of diesel engines with different cylinder diameters by configuring clamping ring groups and claws of various specifications, thereby solving the problem that the existing piston assembly lifting tooling cannot be used to lift the two-piston groove type piston assembly.

[0016] Advantages and features of the present invention will be illustrated and explained by the following non-limiting description of preferred embodiments thereof, which are given by way of example only with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural diagram of the present invention;

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

[0019] Figure 3 yes Figure 2 Rear view of

[0020] Figure 4 It is a three-dimensional structural diagram of the clamp ring group;

[0021] Figure 5 It is an enlarged front view of the jaws. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1 and Figure 2 As shown, the lifting tool of the present invention includes a lifting plate 1, a cross pin 2, a clamp ring group 3 and several claws 4. The lifting plate 1 is located on the top of the piston 10, including a circular plate 11, a cross rib plate group 12 and 8 reinforcing plates 13. A through hole 111 is provided in the center of the circular plate 11 to facilitate the lifting of the crane hook 30. The cross rib plate group 12 includes a group of trapezoidal rib plates 121 and two groups of right-angled trapezoidal rib plates 122. A group of trapezoidal rib plates 121 includes two trapezoidal rib plates arranged in parallel and vertically fixed on the upper side of the circular plate. Each group of right-angled trapezoidal rib plates 122 includes two right-angled trapezoidal rib plates arranged in parallel and vertically welded and fixed on the upper side of the circular plate 11. A group of trapezoidal rib plates 121 and two groups of right-angled trapezoidal rib plates 122 are vertically intersected and fixedly welded to form a cross shape. The 8 reinforcing plates 13 are respectively fixed on the lower side of the circular plate 11. The cross rib plate group 12 and the 8 reinforcing plates 13 improve the strength and rigidity of the lifting plate 1.

[0024] like Figure 2 As shown, the cross pin 2 passes through the center hole 123 of a set of trapezoidal ribs 121, and the right end of the cross pin 2 is locked by the split pin 21. The end of the split pin 21 is connected to the ring 22 bent and fixed to the end of another split pin 21 on a set of right-angle trapezoidal ribs 122 through the ring 22 and the chain 23 in turn, to prevent the split pin 21 locking the cross pin 2 from being lost. The crane hook 30 hooks the middle of the cross pin 2.

[0025] like Figure 1 and Figure 4 As shown, the clamping ring group 3 includes a pair of semicircular clamping ring bodies 31 and 4 groups of clamping bolts 32 and nuts 33. Ear plates 311 are extended from both ends of the pair of semicircular clamping ring bodies 31. The inner diameter of the semicircular clamping ring body 31 matches the outer diameter of the piston 10 of the required lifting piston assembly. The clamping bolts 32 that pass through the ear plates 311 horizontally from top to bottom and the nuts 33 that are tightened on the ends of the clamping bolts 32 are used to enclose the upper end of the piston 20. The upper side of the clamping ring group 3 is adjacent to the 8 reinforcing plates 13 on the lower side of the circular plate 11.

[0026] like Figure 1 to Figure 4As shown, the circular plate 11 has two circles of different circular diameters evenly distributed radially and staggered in each group of four circular plate waist holes 112, and the axis of the circular plate waist holes 112 points to the center of the circular plate 11. The reinforcing plate 13 is provided with a reinforcing plate waist hole 131, which is the same size and position as the circular plate waist hole 112 and is connected vertically. Four evenly distributed bosses 34 extend outward from the upper edge of the clamping ring group 3, and the lifting bolts 35 are respectively vertically passed through the circular plate waist holes 112 and the reinforcing plate waist holes 131 and screwed into the boss threaded holes 341, and the circular plate 11 is clamped by the nuts 33 screwed in the middle of the lifting bolts 35 and located on the upper side of the circular plate 11 and the lower side of the reinforcing plate 13, so that the circular plate 11 and the clamping ring group 3 are fixedly connected as a whole.

[0027] like Figure 4 As shown, three radial slots 36 are evenly distributed on the outer circumference of the clamp ring assembly 3, and another radial slot 36 is arranged 180 degrees opposite to one of the three radial slots 36. Such a structure enables the present invention to be applicable to both three-piston groove type piston assemblies and two-piston groove type piston assemblies, and can be used to lift piston assemblies of diesel engines of different models.

[0028] like Figure 1 and Figure 5 As shown, the left side of the claw 4 is a flat plate 41, and the right side of the flat plate 41 is an arc-shaped surface in contact with the outer circle of the clamping ring group 3, and the arc-shaped surface matches the outer circle of the clamping ring group 3. A positioning block 42 matching the radial slot hole extends outward from the longitudinal center of the arc-shaped surface, and the positioning block 42 passes through the radial slot hole 36 and is embedded in the piston groove positioned at the corresponding position. The upper and lower sides of the flat plate 41 are fixed to the outer circle of the clamping ring group 3 by fastening screws 37 respectively.

[0029] A method for lifting a diesel engine piston assembly lifting tool comprises the following steps:

[0030] 1) Install the clamping ring group 3 and insert the clamping ring group 3 into the upper end of the piston 10. Select the clamping ring group 3 of the corresponding size according to the cylinder diameter of the diesel engine. First, connect the two ends of a pair of semicircular clamping ring bodies 31 into one body through the clamping bolts 32 and nuts 33, and do not tighten the nuts 33 temporarily. Use the four boss threaded holes 341 above the clamping ring group 3, install the lifting screws, and then lift the clamping ring group 3 to the top of the piston assembly through the sling, then slowly lower the clamping ring group 3, and carefully insert the clamping ring group 3 into the upper end of the piston 10 of the piston assembly. Then, according to the number of piston grooves, that is, two piston grooves or three piston grooves, rotate the clamping ring group 3 to ensure that the radial slots 36 of the semicircular clamping ring 31 are aligned with the corresponding piston grooves. Finally, tighten the nuts 33 so that the clamping ring group 3 contains the upper end of the piston 10.

[0031] 2) Install the claws 4. According to the number of piston grooves of the piston assembly, determine the corresponding number of claws 4. This embodiment is a two-piston groove type piston 10, and only two claws 4 are required. Then the arc surface of the claw 4 is pressed against the outer circle of the clamp ring group 3, and the positioning block 42 of the claw 4 passes through the radial slot 36 and is embedded in the piston groove positioned at the corresponding position. Then, the claw 4 is fixed to the clamp ring group 3 with the fastening screws 37 on the upper and lower sides of the flat plate 41 of the claw 4, and finally the eye screws and slings are removed.

[0032] 3) Installation and lifting: first, pass the cross pin 2 horizontally through the center hole 123 of a set of trapezoidal ribs 121, then insert a cotter pin 21 at the right end of the cross pin 2 to lock the cross pin 2, and the end of the cotter pin 21 is connected to the ring 22 at the end of another cotter pin 21 fixed on a set of right-angled trapezoidal ribs 122 through the ring 22 and the chain 23 in turn.

[0033] 4) To lift the piston assembly, first lift the lifting plate 1 steadily and safely above the piston assembly, then select the circular plate waist-shaped hole 112 corresponding to the position of the clamping ring group 3, and screw the lifting bolts 35 vertically through the circular plate waist-shaped hole 112 and the reinforcing plate waist-shaped hole 131 into the boss threaded hole 341, ensuring that the four lifting bolts 35 are screwed into the boss 34 to the same depth, and clamp the circular plate 11 through the nuts 33 screwed in the middle of the lifting bolts 35 and located on the upper side of the circular plate 11 and the lower side of the reinforcing plate 13, so as to fix the circular plate 11 and the clamping ring group 3 into one. Finally, hook the crane hook 30 on the cross pin 2 and lift the piston assembly to the desired position.

[0034] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A diesel engine piston assembly lifting tool, characterized in that: It includes a lifting plate, a cross pin, a clamping ring group and several claws. The lifting plate is located on the top of the piston and includes a circular plate, a cross rib plate group and several reinforcing plates. The center of the circular plate is provided with a through hole; the cross rib plate group includes a group of trapezoidal rib plates and two groups of right-angled trapezoidal rib plates. One group of trapezoidal rib plates includes two trapezoidal rib plates arranged in parallel and vertically fixed on the upper side of the circular plate. Each group of right-angled trapezoidal rib plates includes two right-angled trapezoidal rib plates arranged in parallel and vertically fixed on the upper side of the circular plate. One group of trapezoidal rib plates and two groups of right-angled trapezoidal rib plates are vertically intersected and fixedly connected to form a cross The piston assembly is a circular plate with a plurality of reinforcing plates respectively fixed on the lower side of the circular plate; a transverse pin is passed through the central hole of a group of trapezoidal rib plates, one end of the transverse pin is locked by a split pin, and a crane hook hooks the middle of the transverse pin; a clamping ring assembly surrounds the radial upper part of the piston, and the radial outer edge of the circular plate and the upper end of the clamping ring assembly are respectively fixedly connected by a plurality of bolts and nuts, and are respectively fixed on one side of a plurality of claws on the radial outer circle of the clamping ring assembly and embedded in the piston grooves at corresponding positions, so that the crane hook lifts the piston assembly from top to bottom in sequence through the transverse pin, the lifting plate, the clamping ring assembly and a plurality of claws; The circular plate is provided with a plurality of circular plate waist-shaped holes with different circular diameters and staggered distribution in radially uniform distribution in two circles inside and outside the circular plate, and the axis of the circular plate waist-shaped holes points to the center of the circular plate; the reinforcing plate is provided with a reinforcing plate waist-shaped hole, and the reinforcing plate waist-shaped hole is the same size and position as the circular plate waist-shaped hole, and is connected up and down; a plurality of evenly distributed bosses extend outward from the upper edge of the clamping ring group, and the lifting bolts are respectively vertically passed through the circular plate waist-shaped holes and the reinforcing plate waist-shaped holes and screwed into the boss threaded holes, and the circular plate is clamped by nuts screwed in the middle of the lifting bolts and respectively located on the upper side of the circular plate and the lower side of the reinforcing plate, so that the circular plate and the clamping ring group are fixedly connected as a whole; The clamping ring group includes a pair of semicircular clamping ring bodies and a set of clamping bolts and nuts. Ear plates are extended from both ends of the pair of semicircular clamping ring bodies. The inner diameter of the semicircular clamping ring body matches the outer diameter of the piston of the required lifting piston assembly. The clamping bolts passing through the ear plates horizontally up and down and the nuts tightened on the ends of the clamping bolts are used to make the clamping ring group contain the upper end of the piston. The upper side of the clamping ring group is adjacent to several reinforcing plates on the lower side of the circular plate. The outer circumferential surface of the clamping ring group is evenly distributed with three radial slots, and another radial slot is arranged at 180° relative to one of the three radial slots; one side of the clamping claw is a flat plate, and the contact surface between the one side of the flat plate and the outer circle of the clamping ring group is an arc surface, and the arc surface matches the outer circle of the clamping ring group; a positioning block matching the radial slot extends outward from the longitudinal center of the arc surface, and the positioning block passes through the radial slot and is embedded in the piston groove positioned at the corresponding position; the upper and lower sides of the flat plate are fixed to the outer circle of the clamping ring group by fastening screws respectively.

2. A method for lifting a diesel engine piston assembly lifting tool as claimed in claim 1, characterized in that: The following steps are involved: 1) Install the clamping ring group and insert it into the upper end of the piston. Select the clamping ring group of corresponding size according to the cylinder diameter of the diesel engine. First, connect the two ends of a pair of semicircular clamping ring bodies into one body through clamping bolts and nuts, and do not tighten the nuts temporarily; use the several boss threaded holes on the top of the clamping ring group, install the lifting screws, and then lift the clamping ring group to the top of the piston assembly through the sling, then slowly lower the clamping ring group, and carefully insert the clamping ring group into the upper end of the piston of the piston assembly; then rotate the clamping ring group according to the type of the piston groove to ensure that the radial slots of the semicircular clamping ring body are aligned with the corresponding piston grooves; finally, tighten the nuts so that the clamping ring group encompasses the upper end of the piston; 2) Install the claws. According to the number of piston grooves of the piston assembly, determine the corresponding number of claws to be used; then place the arc surface of the claw against the outer circle of the clamp ring assembly, and make the positioning block of the claw pass through the radial slot and embed it into the piston groove located at the corresponding position; Then fix the claw to the clamp ring assembly with fastening screws on the upper and lower sides of the claw's flat plate, and finally remove the eye screws and slings; 3) Install the lifting plate, firstly, pass the cross pin horizontally through the center hole of a set of trapezoidal ribs, then insert a split pin at one end of the cross pin to lock the cross pin, and the split pin end is connected to the ring of another split pin end fixed on a set of right-angle trapezoidal ribs through a ring and a chain in sequence; 4) To lift the piston assembly, first lift the lifting plate smoothly and safely above the piston assembly, then select the waist-shaped hole of the circular plate corresponding to the position of the clamping ring assembly, and screw the lifting bolts vertically through the waist-shaped hole of the circular plate and the waist-shaped hole of the reinforcing plate into the threaded hole of the boss, ensuring that the depth of several lifting bolts screwed into the boss is the same; and clamp the circular plate by nuts screwed into the middle of the lifting bolts and located on the upper side of the circular plate and the lower side of the reinforcing plate, thereby fixing the circular plate and the clamping ring assembly into one; finally, hook the crane hook onto the cross pin and lift the piston assembly to the desired position.

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