JPS58181584A - Piston snap - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tool for upwardly extracting a piston of a large vehicle.

Conventional piston removal involves applying an iron rod to the connecting rod and punching out the car body from the bottom to the top, which has the following drawbacks.

(1) When punching out a piston from the bottom of the engine to the top, oil drips off and stains your work clothes, which may require you to change clothes midway through the process. The hard work required an hour, which caused back pain.

Furthermore, the support rod would come off when struck with a hammer, which not only caused bruises on the mechanic's hands, but also caused problems with the engine, such as the following.

(2) If the crankshaft is scratched, the bearings will seize and break due to the scratches.

(3) If the edges or mounting surfaces of the connecting slot are damaged, the bearings will collapse during operation, leading to seizure and damage to the crankshaft.

(4) If the piston is launched upwards, there is a risk of damaging the bearings.

(5) There is a risk of hitting or bending the oil jet, and if left as is, there is a risk of creating a hole in the piston.

(6) There is a risk of crushing the skirt portion of the piston.

(7) The thread of the connecting bolt may be broken and the bolt may not be able to be screwed into the bolt hole.
) There is a risk of damaging the crankcase.

(9) If the cylinder liner is bruised, the rings and piston will seize.

There has been an urgent need to develop tools to solve the various problems mentioned above.

The present invention is intended to solve these various problems and will be explained with reference to the drawings.

From FIG. 1 to FIG. 3, the handle 13 is
The piston is pulled upwards by expanding the arms 2 and 2'.As shown in Figure 1, a through hole 8 and a groove 9 are formed in a thick steel plate. By providing this, a shoulder portion 1 in the transverse direction and a pair of arm portions 2 and 2' facing each other in the longitudinal direction are formed. Said shoulder part 1
A screw hole 12 is drilled near the center of the arm 2 in the longitudinal direction.
Cut portions 3, 3' are provided at the top of the side edges of ``, and a through hole 8 is provided from the inside, and thin elastic portions 4, 4'' are provided, and arc-shaped fixing plates 5, 5' and locking claws are provided at the outer tip portions. 6 and 6' are formed to protrude, and the latching claws 6 and 6' are provided with several latching protrusions 7 and 7' in a direction perpendicular to the arm parts 2 and 2'. Guide grooves 10 and 10' are provided at the upper end portions of the split grooves 9 on the inner side of the arm portions 2 and 2' for expanding the semiconical shape downward symmetrically, and the lower end portions are provided with a substantially triangular cut surface 11.・Form 11'. Next, T
A thread 14 is formed on the shaft of the handle 13 in the shape of a letter, and a tapered expanded portion 15 is provided at the tip of the shaft.

Now, for use, as shown in Figure 3, when the locking claws 6 and 6' at the lower end of the piston removal arms 2 and 2' are inserted into the combustion chamber 17 of the piston 16, the stabilizing plates 5 and 5' are It is fixed to the upper edge of the combustion chamber 17. At this time, the lower ends of the arms 2 and 2' touch the swirl projections 23 of the combustion chamber 17 because the substantially triangular cut surfaces 11 and 11 force spaces are formed at the lower ends of the arms 2 and 2'. There is no. Then, when the handle 13 is turned, the thread 14 of the mandrel 13a is screwed into the screw hole 12, so the mandrel 13a of the handle 13 goes down, and the tapered expanding part 15 at the tip passes through the through hole 8 and expands. The arms 2 and 2' descend along the guide grooves 10 and 10' for opening, and gradually expand outward, so that the protrusions 7 and 7' of the locking claws 6 and 6' touch the inner wall 18 of the combustion chamber 17.・It is crimped to B'.

Then, when the handle 13 is pulled up with both hands, the piston 1
6 can be easily pulled upwards.

When the piston 16 is removed and the handle 13 is turned in the opposite direction, the mandrel 13a will gradually rise upwards, and the expanded portion 15 will open up to the arms 2 and 2.
When reaching the through hole 8 of ', the elastic parts 4 and 4' work, -
Since the town 2' is restored, the latch claws 6 and 6' are attached to the combustion chamber 17.
It comes off from the inner walls 18, 18 of.

Figures 4 and below have the same effect, but the movable bolt expands through the arm, presses the latch claw against the wall of the combustion chamber, and pulls out the piston. state

In FIG. 4, a screw hole 12 is vertically drilled from the outside in the longitudinal direction of one of the arms 2 and 2' toward the split groove 9, and a movable bolt 19 is inserted into the screw hole 12 using a tool such as a spanner. By expanding the screw-in arms 2, 2', the locking claws 6, 6' are strongly pressed against the walls 18, 18' of the combustion chamber 17.

This is because the upper edge of the piston 16 is burned with Garbon, etc., and the locking pawls 6 and 6 cannot be fixed simply by turning the handle 13 and pressing the tapered expanded portion 15 onto the walls 18 and 18' of the combustion chamber 17. ′ slips and the piston 16 cannot be removed, turn the movable bolt 19 with a wrench or the like to tighten it firmly, so that the arms 2 and 2′ are further expanded and the locking claws 6 and 6′ are tightened.
The protrusions 7 and 7' are strongly pressed into the walls 18 and 18' of the combustion chamber 17, so the piston 16 can be pulled out no matter how much carbon is burned, which improves piston removal performance. This is further increased by the movable bolt 19.

Figures 5 and 6 illustrate this without a piston, which allows the arms to be made wider or narrower.

Figure 5 shows a screw hole 12 drilled near the center of the shoulder 1, and hanging holes 20, 20 in the side wall for suspending the arms 2, 2'.
′ is drilled.

On the other hand, bolt holes 21 and 2 are provided at the upper ends of the arms 2 and 2'.
1' and semicircular recesses 24 and 24 at the lower end.
', and the upper side of the recessed part 24, 24 is made into a stable part 25, 25.
', and latch claws 6 and 6' are provided on the lower side. In this case, the stable parts 25, 25'i are formed to protrude longer than the lower hooking claws 6, 6'. ' and arm part 2, 2' bolt fixing hole 21
・Align 21′ and swing bolt/nut 22・22″′c
The arms 2 and 2' are attached swingably. Next, the handle 13 is screwed into the screw hole 12 of the shoulder portion 1 to remove the piston. Attach the piston removal latch claws 6 and 6' to the piston 1.
Insert it into the combustion chamber 17 of No. 6, and insert it into the recessed part 24/24' (7).
The upper stable parts 25 and 25 are fixed to the upper edge of the mold stone 16. Then, when the handle 13 is turned, the expanded portion 15 moves downward along the guide grooves 1o and 10' of the arm holder 2'.
The expanding portion 15 expands the arm portions 2 and 2' outward, and the latching claws 6 and 2' are expanded outwardly.
When the piston 6' is pressed against the walls 18 and 18'i of the combustion chamber 17, when the handle 13 is pulled up, the piston 16 is removed. Also, as shown in Figures 5 and 6, there are 2
By drilling more than one lifting hole 2o and 20', it can be used regardless of the capacity of the piston 16 by changing the hanging position of the piston. By adjusting the lowering part 11, the latching claws 6 and 6' can be adjusted to suit various car models and piston sizes.
′? This piston removal allows crimping.

In FIG. 7, the handle 13 and the arm parts 2, 2' are integrally formed, and the arm parts 2, 2' are suspended from the shoulder part 1 so as to be freely expandable.
A spring 27 is attached to the inside of . To explain its structure, spring retaining holes 26 and 26' are bored inside the arm parts 2 and 2', and a spring 27 is attached thereto.

In use, press the arms 2 and 2' inward with both hands and insert them into the combustion chamber 17 of the piston 16. When you release your hands, the restoring force of the spring 27 causes the arms 2 and 2' to move into the combustion chamber. 17 walls 18 and 181 are crimped. Therefore, handle 1
3, the piston 16 will come out.

Figure 8 has the same structure and usage as Figure 7, but
This is used when the upper edge of the piston 16 is burned with carbon etc. To explain this, the arm 2
- Screw holes 12 and 12' are formed in 2' in opposite directions perpendicularly to the longitudinal direction. Next, threads 14 and 14' are formed in opposite directions from the central portion of the movable bolts 19 and 19 toward both ends.

In use, when the movable bolts 19, 19' are screwed into the screw holes 12, 12, the arms 2, 2' close inward, and the distance between the arms 2, 2' becomes narrower. Therefore, piston 1
When the latch claws 6 and 6' are inserted into the combustion chamber 17, the stabilizer plates 5 and 5' are fixed to the upper edge of the piston 16. Then, tighten the movable bolts 19 and 19' with a spanner or When turned, the screw holes 12 and 12' and the screw threads 14 and 14' are formed in opposite directions on the left and right sides, so they simultaneously expand and the retaining claws 6 and 6' are pressed against the walls 18 and 181 of the combustion chamber 17. Then, when the handle 13 is pulled up, the piston 16 comes out.

Figures 9 and 10 show a piston model in which the arm can slide freely relative to the shoulder, making it possible to widen or narrow the arm or change its position according to the size of the piston. Let's talk about.

In Fig. 9, the handle 13 and the shoulder parts 1 and 1' are integrally formed, and sliding holes 28 and 28' are bored near the upper ends of the arm parts 2 and 2', and screw holes 12 and 12 in opposite directions are formed near the lower ends. to be drilled. Next, screw threads 14 and 14' are formed in opposite directions from the center to both ends of the movable bolts 19 and 19' in the same manner as shown in FIG.

Now, when using it, as shown in Figure 10, shoulder parts 1 and 1
Pass the sliding holes 28 and 281 of the arms 2 and 2' from the left and right through the screw holes 12 and 12' (screw the movable bolt 19 into the screw holes 12 and 12'), and hook the arm parts 2 and 2' into the combustion chamber 17. Stopper 6/6'
Insert the arm parts 2, 2' and turn the movable bolts 19/19'.
Expand the hooks 6 and 6' to the walls 18 and 18' of the combustion chamber 17.
When the handle 13 is strongly pulled upward, the piston 16 is pulled out.

Figures 11 and 12 show how the piston is pulled out using the principle of leverage, and this will be discussed below.

In FIG. 11, the shoulder portion 1 is partially formed into a shoulder portion 1e1' as shown in the figure, which is pivotally connected to the shaft of the handle 13 at a fixed portion C. As shown in FIG.

Next, the arms 2 and 2' are formed into a →→ shape in the opposite direction to the approximately doglegged shape, and the bent part in the center is pivotally connected at the fixing part A to form a roughly X shape. are stabilizer plates 5 and 5' and latching claws 6 and 6.
′ is formed. Both ends of the shoulder parts 1 and 1' and the arm parts 2 and 2'
Fixed part B is fixed by pivotally connecting the upper end with fixed part B-D.
-Construct so that D can be expanded.

Now, when using it, as shown in Figure 11, shoulder parts 1 and 1
Bring the fixed part C of ' and the fixed part A of arms 2 and 2' closer together. Therefore, when the latching pawls 6 and 6' are inserted into the combustion chamber 17 of the piston 16 and the handle 13 is pulled up, the latching pawls 6 and 6' are expanded, and the latching pawls 6 and 6' are inserted into the walls 18 and 18' of the combustion chamber 17. It is crimped as shown in Figure 12. Then, when the handle 13 is pulled back, the piston 16 comes out.

Figures 13, 14, and 15 show that the shoulder part 1 and the arm part 2 are integrally formed, and to explain this with figures, the cylindrical shoulder part 1 and the shoulder part 1 are threaded from the top surface to the bottom surface in the longitudinal direction. A hole 12 is formed, and an umbrella-shaped arm portion 2 is integrally attached to the shoulder portion 1.
form 9. As shown in FIG. 15, radial grooves 9 are provided from the vicinity of the upper end to the lower end of the umbrella-shaped arm 29.Next, the lower end of the arm 29 is cut into a U-shape at its periphery.
The cut-off upper side is used as a stable part 25, and the lower side is provided with a latching claw 6 having a protrusion 7, but the stable part 25 is formed to be longer than the latching claw 6. Next, the shaft 13a of the handle 13
A screw 11114 is screwed into the screw hole 12 of the shoulder portion 1, and a dish-shaped expanded portion 3o is fixed to the tip of the shaft 13a.

For use, as shown in Fig. 16 (insert the latch claw 6je for removing the piston into the combustion chamber 17 of the piston 16, place the stabilizer 25 on the upper edge of the piston 16, and turn the handle 13 to remove the thread 14). As the plate-shaped expansion portion 30 gradually rises upward, the locking pawl 6 presses against the walls 18 and 181 of the combustion chamber 17 in order to expand the arm portion 29.

Therefore, when the handle 13 is pulled up, the piston 16 is pulled out.

Figures 17 and 18 show a piston extractor in which replacement teeth 33 and 33' for stabilizing plates 5 and 5' and latching claws 6 and 6' are formed so that they can be attached and detached from arm parts 2 and 2'. Let me explain about that.

As shown in FIG. 17, substitute teeth 33 and 33' are made in which stabilizing plates 5 and 5' and locking claws 6 and 6' are integrally formed.
By detaching and replacing 3 and 33', it can be used regardless of the size of the combustion chamber 17. To explain this with a drawing, as shown in FIG. 17, notches 31 and 31' are provided at the lower ends of the arms 2 and 2',
Drill 'I threaded screws 34, 34 and threaded holes 32, 32'.

Next, replacement teeth 33, 33' are formed by integrally forming the stabilizing plates 5, 5' and the locking claws 6, 6', and the replacement teeth 33, 33 are formed.
Drill screw holes 32 and 32' with screws 34 and 34.

Now, in use, as shown in Fig. 18, the notch 31
・311 Stabilizing plates 5, 5' and locking claws 6, 6' are integrally formed with replacement teeth 33, 33', and screws 34, 34
', insert the replacement teeth 33, 33' into the screw holes 3 of the arms 2, 2'.
2.Thread through 32'.

Next, by inserting the latch claws 6 and 6' into the combustion chamber 17 of the piston 16 and turning the handle 13, the arms 2 and 2' are expanded by the expanding part 15, and the arms 2 and 2' are expanded. Latching claw 6
・6' is pressed onto the walls 18 and 181 of the combustion chamber 17.

Therefore, it is a partial auxiliary tool that can also be used for the piston 16 by pulling up the handle 13 strongly.

Figures 19 and 20 show cap teeth 35 and 35' formed on the stabilizing plates 5 and 5' and locking claws 6 and 6'.
This will be explained with reference to the piston 16, which can be attached or detached depending on the size of the piston 16.

The back sides of the cap teeth 35, 35' are hollow, and fitting portions 36, 36' for the stabilizing plates 5, 5' are formed, and stabilizing plates 5a, 5a' are formed on the front side cap teeth 35, 35'. In addition, the back side of the lower end of the cap teeth 35, 35' is hollow to form a fitting part 37, 37' for the latching pawl 6, 6', and the front side is formed as a hollow part for the latching pawl 6a, 6a' of the cap tooth 35, 35'.
form. Stabilizing plate 5a of the cap teeth 35 and 35'
5a' and the latching claws 6a, 6a' are made in different lengths, and then screw holes 32, 32' are drilled in the arm parts 2, 2' and the cap teeth 35, 35'.

Now, when assembling this without the piston, the stabilizer plate 5
・When cap teeth 35, 35' are placed over 5' and latching claws 6, 6', the stabilizing plates 5a, 5a' and latching 1F claws of the stabilizing plates 5, 5' have Yap teeth 35, 35'. 6a・6
a' is used according to the size of the piston 16. For example, if the piston 16 is large, the combustion chamber 17 is also large, so the stabilizing plates 5a and 5 of the cap teeth 35 and 35' are used.
Select the one with long a' and latching claws 6a and 6a', and cover the stabilizer plates 5 and 5' and latching claws 6 and 6' with screws 34 and 34'''.
The 20th model was assembled so that it could be used with pistons of different car models and manufacturers by attaching it with 'C' screws.
It is a diagram. When using the piston remover shown in Fig. 19, as described above, assemble the piston as shown in Fig. 20.
Insert the latch claws 6a and 6a' into the stabilizing plates 5a and 5a'.
is placed on the upper edge of the piston 16, and by turning the handle 13, the expanding part 15 moves down along the guide grooves 10, 10' of the arms 2, 2', and the arms 2, 2' gradually expand outward. Then, the hooks 6a and 6a' of the cap teeth 35 and 35' are pressed against the walls 18 and 18' of the combustion chamber 17.

Therefore, when the handle 13 is pulled up with both hands, the piston 16
is something that can be removed. In this way, the cap teeth 35 and
35' is a partial auxiliary tool that can be used for any car model.

FIG. 21 shows that by screwing in the shoulder bolt 42, the arm parts 2 and 2' expand due to the principle of leverage, and the latch claws 5 and 5' open the combustion chamber 17 of the piston 16. It is pressed against the wall 18 and the piston 16 is pulled upward.

Shoulder fixing holes 39 and 39' are drilled in the upper end of 2', headed pins 40 and 40' are inserted into the shoulder fixing holes 39 and 39', and bolts are inserted into the headed pin 40. The hole 41 and the other headed pin 40' are provided with a shoulder bolt screw hole 43, and the headed pins 40 and 40' are provided with shoulder fixing holes 39 and 39.
’ to make it rotatable. Now, when using it, we will use the shoulder bolt through hole 4 of the head pin 40/40'.
When the shoulder bolts 42 are screwed into the bolt holes 43 and 1, the ends of the arms 2 and 2' are tightened inward and the gap narrows, so that the arms 2 and 2' are attached to the holding plate 38 at the fixed part E.
・Since it is pivotally connected to E', it becomes a fulcrum and the arms 2 and 2'
Since the lower end of the piston 16 is expanded, the latch claws 6 and 6' are attached to the piston 16.
It is press-fitted to the walls 18 and 18' of the combustion chamber 17.

Therefore, when the handle 13 formed integrally with the holding plate 38 is pulled up, the piston 16 is pulled out.

In Figs. 23 and 24, when the arms 2 and 2' are expanded according to the principle of leverage, the latch claws 6 and 6' are pressed against the walls 18 and 18' of the combustion chamber 17 of the piston 16, and the piston 16 is This is something I will draw out, and I will talk about it. As shown in FIG. 23, the arms 2 and 2' are pivotally connected to the retaining plate 38 in the vicinity of their central portions so as to be freely expandable. A screw hole 12 is bored in the holding plate 38. Next, through holes 45 and 45' having bulges 46 and 46' on the inside are bored in the shoulder part 1, and a hole 47 is bored in the center part through which the shaft 13a of the handle 13 is passed. The handle 13
A screw thread 14 is provided at the lower end portion.

Now, for use, insert the axle through hole 47 in the shoulder parts
When the handle 13 is inserted into the handle 13 and the handle 13 is turned, the shoulder part 1 is attached to the handle stop 48 and 4 of the shaft 13a of the handle 13.
8', but the thread 14 of the shaft 13a of the handle 13 or the screw hole 12 of the retaining plate 38 rotates. (By being screwed in, the shoulders 1 and 1' are connected to the heads 44 and 4 of the arms 2 and 2' by the bulges 46 and 46' of the through holes 45 and 45'.
4' gradually rises from the through holes 45, 45', thereby narrowing the upper ends of the arms 2, 2'. In other words, by moving the shoulder parts 1 and 1' closer to the retaining plate 38, the arm part 2
・2' part 2/2' The lower end of -1/2' is expanded according to the principle of force. For this purpose, the latching claws 6, 6' are pressed against the walls 18, 18' of the combustion chamber 17 of the piston 16. Then, when you pull the handle 13 upward, the piston 16
is something that can be removed.

In Fig. 25, the sections between the stabilizing plates 5, 5' and the latching claws 6, 6' are formed with inclined cross-sections 49, 49'.
6' is pressed against the inner walls 18, 18' of the combustion chamber 17 of the piston 16, and is shaped to be sturdy so that the latch claws 6, 6' will not be broken when the piston 16 is pulled up.

26 and 27 show a case in which the shoulder portion 1 extends in the direction of the arm, and the shoulder portions 2 and 2' are pivotally attached so as to be swingable, which will be described below.

As shown in Figures 26 and 27, the shoulder part 1 is connected from both ends to the arm parts 2 and 2'.
The arm portions 2 and 2' are connected to the extending portions 50 and 50 of the shoulder portion 1.
The arms 2 and 2' are pivotably attached to the arm 50'.

Now, when using it, it is the same as the usage method shown in Figure 3.
Screw the handle 13 into the shoulder 1, expand the four retaining arms 2 and 2' with the expanded part 15, and the latch claws 6 and 6' engage the walls 18 and 17 of the combustion chamber 17 of the piston 16. 18'. Then, when the handle 13 is pulled up, the piston 16 comes out. The piston removal shown in FIGS. 26 and 27 has the arm portions 2 and 2' pivotally mounted so that they can swing freely, so it can be used regardless of the size of the piston, just like the piston removal shown in FIGS. 5 and 6.

28 and 29 show a hollow expanded portion 51 formed so as to be able to cover the expanded portion 15. I will talk about that.

This will further expand the scope of development.

Now, for use, as shown in Fig. 29, cover the hollow expanded portion 51 over the expanded portion 15, screw the handle 13 into the shoulder portion 1, expand the arm portions 2 and 2', and tighten the latching claws 6 and 6. ' is pressed against the wall J8, 18' of the combustion chamber 17 of the piston 16.

Then, when the handle 13 is pulled up, the piston comes out. To remove the piston shown in Figs. 28 and 29, replace the hollow expanded portion 51 according to the size of the piston,
By adjusting the wideness or narrowness of the expansion of the arm parts 2 and 2', it is possible to pull out the piston regardless of its size. This is a partial auxiliary tool that can be used with any piston.

Figures 30 and 31 show a stabilizing plate and a locking pawl formed on a horse-shaped tooth 54, which will be described below.

As shown in FIG. 30, band-shaped latching claws 52 and 52' are extended to the elastic portion 4, and stable bars 53 and 53' are formed approximately vertically on the upper edges of the band-shaped latching claws 52 and 52'. However, camphor-shaped teeth 54 are formed. The bell-shaped teeth 54 are attached to the piston 1.
The combustion chamber 17 of 6 is large and the latch claws 6 and 6' are attached to the inner wall 18 and 1.
It is used as an auxiliary when it is not possible to press the 8'.

In use, as shown in FIG. 31, when the horse-shaped teeth 54 are fixed to the upper edge of the combustion chamber 17 of the piston 16, the latch claws 6, 6' push the horse-shaped teeth 52, 52' open and open the piston. The inner walls 18 and 18' of the 16 combustion chambers 17 are crimped. In that case, the protrusions 7, 7' of the latching claws 6, 6' and the grooves of the band-shaped latching claws 52, 52' mesh with each other. Therefore, when the handle 13 is pulled upward, the piston 16 comes out. In this way, if the horse-shaped teeth 54 are made in various sizes, the tool can be used as an auxiliary tool for any type of piston.

To explain the structure with reference to the drawings, as shown in FIG. A twisted hole 12 is provided in the center direction, and an insertion hole 6 for the hanging rod 62, 62' is provided in the horizontal direction.
Produce 1.61'.

In addition, slide grooves 58 and 5 are provided at the tips of the hanging rods 62 and 62'.
8' and from the bottom 60, 60', set screws 59,
At 59', the locking rods 62 and 62' are held in place so as to slide.

Now, when using it, hold the handle 13 with the inverted T-shaped arm 5.
By screwing into the screw hole 12 of 7, the widened part 1 at the tip
5 pushes open one end of the locking rods 62, 62', and the locking rods 62, 62' protrude outward through the slide groove 58, so that the locking claws 6, 6' at the other end are pushed outward. The inner walls 18 and 18' of the combustion chamber 17 of the piston 16 are pressed against each other. In that case, if the upper edge of the piston 16 is stuck with carbon or the like and cannot be removed, the slide hammer 56 is slid downward L and the stopper 55 is struck to punch out and expand.This will be described below.

To explain the structure of piston removal in Figures 34 and 35, shoulder 1
A movable screw 64 is provided at the upper end of the arm portion 2'. The shaft 13a of the handle 13 is formed so that it can be screwed into it through a screw hole 63.

Now, for use, turn the movable screw 64 to release the arm 2'.
Expand the latching claws 6 and 6' to the combustion chamber 17 of the piston 16.
The piston 16 is crimped onto the inner walls 18 and 18' of the piston 16, and the piston 16 is pulled out.

FIG. 36 shows a piston that expands the arm portion 2 using a movable screw 64 in the same way as in FIGS. 34 and 35. To explain its structure, as shown in FIG. It is attached so that it can rotate freely.

In use, when the movable screw 64 is turned, the shaft 65 of the movable screw opens outward, so that the arms 2 are expanded. Therefore, since the locking claws 6, 6' are pressed against the inner walls 18, 18' of the combustion chamber 17 of the piston 16, when the handle 13 is pulled up, the piston 16 is removed.

The piston extractor shown in Fig. 37 has a structure similar to that of the piston extractor shown in Figs. 4, 9, and 10. A point 67 is formed, a sliding hole 28 is formed in the arm 2', and the arm 2' is fitted into the shoulder part 1 so that the arm 2' can be slid freely.

Now, for use, insert the locking claws 6, 6' of the arms 2, 2' into the combustion chamber 17 of the piston 16, and then tighten the movable bolt 19.
When turned, the tip of the movable bolt 19 presses the four points 67 of the arm 2', so the arm 2' slides on the shoulder 1 and expands, causing the inner wall 18 of the combustion chamber 17 of the piston 16 to open. latching claw 6.6
' is crimped. Then, when the handle 13 is pulled up, the piston 16 comes out.

Since the present invention pulls out the piston upward as described above, it does not get dirty with oil and does not require the unnatural work of punching the piston from the bottom to the top by hitting it with a hammer. It doesn't cause back pain, and you don't get bruises on your hands from missed shots.

Moreover, since the hammer is not applied to the rod, there will be no damage to the crankshaft, connecting rod, bearing, oil jet, piston skirt, connecting thread, crankcase, cylinder liner, etc. This allows the piston, which is the lifeblood of a car, to be safely removed.

Moreover, whereas the conventional punching operation from below required more than an hour, the present invention is an innovative tool that can be punched out in just 10 minutes.

As mentioned above, the present invention consists of a shoulder part and an arm part, and by expanding the arm part through the shoulder part and the arm part using a handle, a movable bolt, a movable screw, a lever principle, etc., the latching claw can be attached to a piston. By being crimped to the inner wall of the combustion chamber, the piston can be easily pulled upwards by pulling up on the handle.

In addition, by using replacement teeth, cap teeth, horse-shaped teeth, and hollow expansion parts according to the size of the piston, it is possible to pull out the piston of any car model, especially if a movable bolt or slide hammer is attached. This piston removal method is characterized in that it is formed so that a piston that has been seized can be easily pulled out or punched out.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the present invention. Figure 2 is a front view. FIG. 3 is a perspective view of the embodiment. Figure 4 is a front view with the bolt attached and the piston removed. FIG. 5 is a perspective view without the piston, which allows the arm to swing freely. FIG. 6 is a perspective view of the embodiment of FIG. 5. FIG. 7 is a perspective view of a piston with a spring attached to the arm. Figure 8 is a perspective view of Figure 7 with the bolt removed and the piston removed. 9th
The figure is a perspective view with the arms slidable and bolts attached to the arms. FIG. 10 is a perspective view of the embodiment of FIG. 9. FIG. 11 is a perspective view in which the arm portion is approximately X-shaped. FIG. 12 is a perspective view of the embodiment of FIG. 11. FIG. 13 is a perspective view in which the shoulder portion is cylindrical and the arm portion is umbrella-shaped. FIG. 14 is a cross-sectional view of FIG. 13. FIG. 15 is a plan view of FIG. 13. FIG. 16 is an embodiment diagram of FIG. 13. FIG. 17 is a perspective view of the fixing plate and the hook that can be attached and detached. FIG. 18 is a cross-sectional view of the embodiment of FIG. 17. FIG. 19 is a perspective view of a device to which a fixing plate and a latch claw can be attached. Figure 20 is the first
FIG. 9 is an assembled perspective view of FIG. FIG. 21 is a perspective view of the shoulder with a shoulder bolt. FIG. 22 is a rear perspective view of FIG. 21. FIG. 23 is a perspective view of the shoulder part that can be moved up and down. Second
Figure 4 is a partial vertical sectional view of Figure 23. FIG. 25 is a perspective view of the fixed plate and the latching claw, which are inclined. FIG. 26 is a perspective view with the shoulder section extended. FIG. 27 is a side structural view of FIG. 26. FIG. 28 is a perspective view of the hollow expanded portion. Figure 29 is an assembly diagram for use. FIG. 30 is a perspective view of a horse-shaped tooth. FIG. 31 is a perspective view of an embodiment of 4xl-shaped teeth. 32nd
The figure is a longitudinal sectional view of FIG. 33. FIG. 33 is a perspective view of an embodiment with a slide hammer attached. FIG. 34 is a longitudinal sectional view of FIG. 35. FIG. 35 is a perspective view of a piston with a movable screw attached. FIG. 36 is a perspective view of a piston with a movable screw attached. 37th
The figure is a perspective view with the movable bolt attached and the piston removed. Code: 1 is the shoulder. 2.2' is the arm. 3 and 3' are notches. 4 and 4' are elastic parts. 5 and 5' are stabilizing plates. 6 and 6' are latch claws. 7 and 7' are protrusions. 8 is a through hole. 9 is split groove. 10.1
0' is a guide groove. 11 and 11' are cut surfaces. 12 is a screw hole. 13 is the handle. 14 is a screw thread. 15 is the expansion part. 16 is the piston. 17 is the combustion chamber. 18 and 18' are the inner walls. 19 is a movable bolt. 20/201i hanging hole. 21・21'
is a bolt hole. 22 and 22' are swing bolts and nuts. 23 is a vortex projection. 24 and 24' are depressions. 25-25'+ stable part. 26
・26' is a spring retaining hole. 27 is a spring. 28
・28'I sliding hole. A-B-C-D are fixed parts. 29 is an umbrella-shaped arm part 1. 30 is a dish-shaped expansion part. 31・31'l Notch part. 32.3
2'? i screw screw hole. 33・33′ (replacement teeth. 34・
34' is a screw, 135/35'4 is a cap tooth. 5a・
5a' is a stabilizing plate for the cap teeth. 6a and 6a' are the hooks for the cap teeth. 36, 36' (stabilizer plate inset part. 37
・371 latching claw fitting part. E and E' are fixed parts, and 38 is a holding plate. 39 and 39' are shoulder fastening holes. 40/401 headed pin. 41 is the shoulder bolt through hole. 42 is the shoulder bolt. 43 is a bolt screw hole. 44.44
′ is the head of the arm. 45/45'I through hole. 46.46'
(Mafbelt part. 47 is the shaft through hole. 48・48'l! Handle stopper. 4
9.49' is sloping. 50, 50' (extending part. 51 is a hollow expanded part. 52, 521 is a band-like retaining claw. 53, 53' (fixed brim. 54 is a horse bowl-shaped tooth. 55 is a stopper. 56 is a slide Hammer. 57 is an inverted T-shaped arm. 58 is a slide groove. 5
9 is a set screw. 60 is the bottom. 61 is an insertion hole. 62 is a hanging rod. , 63 is the handle exchange screw part. 64 is a movable screw. 6
5 is the shaft of the movable screw. 66 is the fixing bolt. 67 is 4 points. Patent applicant Koko Furusawa Yamanikkodai Figure 3 Figure 4 Figure 6 Figure 7 Figure 10I! l Fig. 11 Fig. tali Fig. 13 Cylindrical 4 Fig. 15 Fig. 1G Fig. 17 Fig. 18 Fig. 19 Fig. 25 Fig. 26 Fig. 27 Fig. 29 Fig. 31 Fig. 32 Fig. 33 3710

Claims (16)

[Claims] (1) Consisting of a shoulder and an arm, by expanding the arm through the shoulder and arm using the principle of a handle, bolt, or screw, the latch claw of the arm can be moved into the combustion chamber of the piston. A piston puller characterized by being crimped onto the wall of the piston and formed so that the piston can be pulled out. (2) A thin elastic part is formed near the upper end of the arm parts 2, 2', and a stabilizing plate 5, 5' and a latching claw 6, 6' are formed near the lower end. Removing the piston as described in section. (3) The opening 15 is tapered, the movable bolt 19, the plate shape 3O, and the arm part 2 through the shoulder part 1 by a method such as
The piston extractor according to claim 1, characterized in that the piston is formed so as to expand. (4) The piston extractor according to claim 1 is formed so that the arm parts 2 and 2' can be expanded by the movable bolt 19 via the arm parts 2 and 2'. . (5) The piston extractor according to claim 1, wherein the arm portions 2 and 2' slide on both ends of the shoulder portions 1 and 1'. (6) The piston extractor according to claim 1, wherein the arm portions 2, 2 can be hung from the shoulder portions 1, 1' in a swingable manner and can be freely wide or narrow. (7) The piston extractor according to claim 1, characterized in that an elastic body such as a spring 27 is attached to the inside of the arm portions 2 and 2'. (8) The shoulders 1 and 1' and the arms 2 and 2' are pivoted to the handle 13 in a substantially X shape, or the arms 2 and 2' are pivoted to the holding plate 38, and Toshiko The piston removal according to claim 1, characterized in that the principle of the above is applied. ± (9) The shoulder portion 1 is integrally formed with a cylindrical shape and an umbrella-like arm 2″?, a screw hole 12 is bored in the shoulder portion 1, and a split groove 9 is provided in the arm portion 2 from the lower end to the vicinity of the upper end. A piston extractor according to claim 1, characterized in that: (10) The piston extractor according to claim 1, characterized in that the stabilizing plates 5, 5' and the locking claws 6, 6' are detachable. (11) Stabilizing plates 5 and 5' of arm parts 2 and 2' and latching claws 6 and 6
The piston extractor according to claim 1, wherein recessed portions 24, 24 or inclined shapes 49, 49' are formed between '. (12) The piston extractor according to claim 1, wherein the shoulder portion 1 extends in the direction of the arm portion. (13) The piston extractor according to claim 1, characterized in that a hollow expanded portion 51 is formed. (14) Replacement teeth 33, 33', cap teeth 35, 35'
The piston extractor according to claim 1, characterized in that the hollow expanded portion 51 and the horse trace-shaped teeth 52 and 52' are formed in a removable manner. (15) The piston extractor according to claim 1, wherein the slide hammer 56 is slidably disposed on the shaft 13a of the handle 13. (16) The piston extractor according to claim 1, characterized in that the arm portions 2 and 2' are formed so as to be expandable by the movable screw 64.