JP2021099034A - Engine hook and engine including engine hook - Google Patents

Abstract

To provide an engine hook that can hook an engine in accordance with multiple types of hooking tool and suppress deterioration in heat radiation property of an engine, and to provide an engine including an engine hook.SOLUTION: Engine hooks 1, 1 fitted to an engine 100 and hooked by a hooking tool to hook the engine 100 with the hooking tool includes: a first hole part 20 hooked by a first hooking tool; and a second hole part 30 hooked by a second hooking tool that is different type from the first hooking tool.SELECTED DRAWING: Figure 1

Description

The present invention relates to an engine having an engine hook and an engine hook for hanging the engine on a hanger.

For example, in an engine production line or a line for mounting an engine on a vehicle, an engine hook is attached to the engine in order to hang the engine on a hanger arranged in a factory and lift the engine. Patent Document 1 discloses this type of engine hook. The engine hook disclosed in Patent Document 1 has one hook hole.

Japanese Unexamined Patent Publication No. 2013-60895

For example, a plurality of types (for example, two types) of hanging tools having different shapes and dimensions may exist in a production line or the like. If the engine hook has only one hook hole and the design of one of the components of the engine, for example, the shape and size of the head cover is changed, the above-mentioned plurality of types of hanger It may be difficult to start the engine correspondingly. Therefore, it is difficult to change the design of engine components such as a head cover while supporting a plurality of types of hanging tools. As a result, there is a problem that the degree of freedom in design is reduced.

In addition, a plurality of engine hooks are attached to the cylinder head of the engine so that the hanger can hang the engine stably. The engine hook is not only attached to the production line or the like, but remains attached to the cylinder head even after it is commercialized. Therefore, when the engine is mounted on a vehicle or the like and the cooling fan rotates, the cooling air generated by the cooling fan does not easily flow in the cylinder head region due to the presence of the engine hook. Therefore, the heat dissipation of the cylinder head of the engine may be deteriorated.

The present invention has been made to solve the above problems, and is an engine hook and an engine capable of starting an engine corresponding to a plurality of types of hanging tools and suppressing a decrease in heat dissipation of the engine. It is an object of the present invention to provide an engine having a hook.

The subject is an engine hook for hanging the engine on the hanging tool by being attached to the engine and hanging on the hanging tool, the first hole portion to be hung on the first hanging tool, and the first hanging tool. Is solved by an engine hook according to the present invention, characterized in that it has a second hole that is hung on a different type of second hanger.

According to the engine hook according to the present invention, since the engine hook has a first hole portion and a second hole portion, it can be used for a plurality of types (for example, two types) of hangers (first hanger and second hanger). The engine can be started correspondingly. Therefore, even if the shape and size of the engine head cover are changed in design, the engine can be hung on the hanger by hooking a plurality of types of hangers on the first hole and the second hole. .. As a result, it is possible to suppress a decrease in the degree of freedom in designing engine components. Moreover, the engine hook can pass the cooling air through the first hole portion and the second hole portion, and it is possible to suppress the presence of the engine hook from adversely affecting the passage of the cooling air. That is, it is possible to prevent the engine hook from obstructing the flow of the cooling air that tries to reach the head cover or the like. As a result, it is possible to suppress a decrease in heat dissipation of the engine and improve the durability of the engine. Moreover, the surface area of the engine hook can be increased, and the heat dissipation of the engine hook itself can be improved.

In the engine hook according to the present invention, preferably, the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, and the first hole portion has a circular hole. The second hole portion has an elongated hole.
According to the engine hook according to the present invention, the engine can be hung on the first hanger by using the first hole portion having the circular hole on the upper side of the engine hook, and the long hole on the lower side of the engine hook is provided. The engine can be hung on the second hanger using the two holes. Therefore, even if the design of the engine, for example, the head cover is changed, the engine can be suspended by a plurality of types of suspending tools.

In the engine hook according to the present invention, preferably, the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, and the first hole portion has an elongated hole. The second hole portion has a circular hole.
According to the engine hook according to the present invention, the engine can be hung on the first hanger by using the first hole portion having the elongated hole on the upper side of the engine hook, and the circular hole on the lower side of the engine hook is provided. The engine can be hung on the second hanger using the two holes. Therefore, even if the design of the engine, for example, the head cover is changed, the engine can be suspended by a plurality of types of suspending tools.

In the engine hook according to the present invention, preferably, the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, and each has a circular hole. To do.
According to the engine hook according to the present invention, the engine can be hung on the first hanger by using the first hole portion having the circular hole on the upper side of the engine hook, and the first hole having the circular hole on the lower side of the engine hook. The engine can be hung on the second hanger using the two holes. Therefore, even if the design of the engine, for example, the head cover is changed, the engine can be suspended by a plurality of types of suspending tools.

In the engine hook according to the present invention, preferably, the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, and each has an elongated hole. To do.
According to the engine hook according to the present invention, the engine can be hung on the first hanger by using the first hole portion having the long hole on the upper side of the engine hook, and the long hole on the lower side of the engine hook is provided. The engine can be hung on the second hanger using the two holes. Therefore, even if the design of the engine, for example, the head cover is changed, the engine can be suspended by a plurality of types of suspending tools.

The subject is an engine having an engine hook for hanging the engine on the hanging tool by being attached to the engine and hanging on the hanging tool, and the engine hook is a first hole portion to be hung on the first hanging tool. This is solved by an engine having an engine hook according to the present invention, which comprises a second hole portion for being hung on a second hanger of a type different from that of the first hanger.

According to an engine having an engine hook according to the present invention, since the engine hook has a first hole portion and a second hole portion, a plurality of types (for example, two types) of hangers (first hanger and second hanger) are used. The engine can be started according to the tool). Therefore, even if the shape and size of the engine head cover are changed in design, the engine can be hung on the hanger by hooking a plurality of types of hangers on the first hole and the second hole. .. Moreover, the engine hook can pass the cooling air through the first hole portion and the second hole portion, and it is possible to suppress the presence of the engine hook from adversely affecting the passage of the cooling air. As a result, it is possible to suppress a decrease in heat dissipation of the engine and improve the durability of the engine. Moreover, the surface area of the engine hook can be increased, and the heat dissipation of the engine hook itself can be improved.

According to the present invention, it is possible to provide an engine having an engine hook and an engine hook which can start an engine corresponding to a plurality of types of hanging tools and can suppress a decrease in heat dissipation of the engine.

It is a figure which shows the engine hook and the engine which has the engine hook which concerns on 1st Embodiment of this invention. It is a figure which illustrates two kinds of hanging tools for hanging the engine hook of FIG. It is a figure which shows the engine hook which concerns on other embodiment of this invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are added, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects. Further, in each drawing, the same components are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

(First Embodiment)
<Example of shape of engine hooks 1 and 1>
FIG. 1 is a diagram showing an engine hook and an engine having an engine hook according to the first embodiment of the present invention.
FIG. 2 is a diagram illustrating two types of hangers for hanging the engine hook of FIG. 1.

The engine 100 illustrated in FIG. 1 is, for example, a small industrial diesel engine. The engine 100 is, for example, a high-output 3-cylinder engine with a turbocharger, and is mounted on a construction machine, an agricultural machine, a lawnmower, or the like. The engine 100 includes a cylinder head 101, a cylinder block 102, a cooling fan 103, and a head cover 109. Further, the engine 100 further includes an engine hook 1. In the example shown in FIG. 1, the engine 100 includes two engine hooks 1, 1. The engine hooks 1 and 1 are attached to the cylinder head 101. The number of engine hooks 1 installed is not particularly limited, and may be one or three or more. Further, the mounting position of the engine hook 1 is not limited to the cylinder head 101, and may be, for example, the cylinder block 102.

The engine hooks 1 and 1 are used, for example, in a production line of the engine 100 or a line for mounting the engine 100 on a vehicle, when the engine 100 is hung on a hanging tool arranged in a factory and lifted. Examples of the hanger include two types of hangers, the first hanger 200 shown in FIG. 2 (A) and the second hanger 300 shown in FIG. 2 (B). The engine hooks 1 and 1 are members that can be hung on any of the two types of hangers 200 and 300 shown in FIG. Thereby, for example, a worker or the like in a factory can suspend and move the engine 100 by selecting one of the suspending tools 200 and 300 using the two engine hooks 1 and 1. The engine hooks 1 and 1 have the same shape and the same dimensions, and are formed of a flat metal plate. For example, the engine hooks 1 and 1 are made of a metal having high strength and heat dissipation, such as iron or a stainless alloy. Structural examples of the hanging tools 200 and 300 will be described later.

First, a preferred shape example of the engine hooks 1 and 1 will be described with reference to FIGS. 1 (A) and 1 (B).
As shown in FIG. 1A, the engine hooks 1 and 1 are plate-shaped members, and have an upper end portion 2, a lower end portion 3, and side end portions 4 and 5. The upper end 2 of the engine hooks 1 and 1 is preferably formed in a semicircular shape. As described above, one of the reasons why the upper end portion 2 is formed in a semicircular shape and is not rectangular is that when the first hanging tool 200 or the second hanging tool 300 approaches the upper end portion 2. This is to prevent a part of the first hanging tool 200 or the second hanging tool 300 from being caught in the upper end portion 2 as much as possible.

As shown in FIG. 1A, the lower end portion 3 of the engine hooks 1 and 1 is formed to be tapered, and has inclined portions 6 and 7 and an arc-shaped end portion 8. The left and right side ends 4 and 5 of the engine hooks 1 and 1 are parallel to each other along the Z direction. The "Z direction" is a vertical direction, that is, a vertical direction in a state where the engine hooks 1 and 1 are attached to the engine 100. One side end portion 4 is formed between the upper end portion 2 and the inclined portion 6 of the lower end portion 3. The other side end portion 5 is formed between the upper end portion 2 and the inclined portion 7 of the lower end portion 3.

As shown in FIGS. 1A and 1B, the engine hooks 1 and 1 have a first hole portion 20, a second hole portion 30, and a bolt hole 40. The first hole portion 20, the second hole portion 30, and the bolt hole 40 are through holes formed in series and at intervals along the Z direction, which is the longitudinal direction, in the engine hooks 1 and 1. Is. In other words, the first hole portion 20, the second hole portion 30, and the bolt hole 40 are arranged side by side in a state where the engine hooks 1 and 1 are attached to the engine 100.

As shown in FIG. 2A, the first hole portion 20 is hung on, for example, the first suspending tool 200, and is used when the engine 100 is suspended. As shown in FIG. 2B, the second hole portion 30 is hung on a second hanger 300 of a type different from that of the first hanger 200, and is used when the engine 100 is hung. As shown in FIG. 1A, the first hole portion 20 has a circular hole (circular hole).

In the example of FIG. 1A, the second hole portion 30 has an elongated hole instead of a circular hole. Specifically, the second hole portion 30 has an upper semicircular portion 31, a lower semicircular portion 32, and left and right parallel side surface portions 33 and 34. For example, the distance D1 between the side surface portions 33 and 34 in the second hole portion 30 is substantially the same as the diameter D of the first hole portion 20. The distance D2 between the upper semicircular portion 31 and the lower semicircular portion 32 is larger than the distance D1.

For example, the size of the diameter D of the first hole portion 20 is about 18 mm or more and 22 mm or less. For example, the dimension of the interval D1 of the second hole portion 30 is about 18 mm or more and 22 mm or less. For example, the dimension of the distance D2 in the Z direction in the second hole portion 30 is about 35 mm or more and 40 mm or less. The first hole portion 20 is formed at a position higher than the second hole portion 30 and the bolt hole 40 in the Z direction, that is, in the vertical direction. The second hole portion 30 is formed between the first hole portion 20 and the bolt hole 40. The bolt hole 40 is a circular hole for passing the fastening bolt 50 for mounting shown in FIG. 1 (B).

As shown in FIG. 1B, the female threaded portion 101R of the cylinder head 101 is formed on the front surface portion 101B of the cylinder head 101 and the back surface portion 101C on the opposite side of the front surface portion 101B, respectively. By fitting the fastening bolt 50 into each female screw portion 101R of the cylinder head 101 through the bolt hole 40, the engine hooks 1 and 1 are fixed to the front portion 101B and the back portion 101C on the opposite side, respectively.

As shown in FIG. 1, the engine hooks 1 and 1 are fixed to the cylinder head 101 in a state of extending in the Z direction. The front surface 1F and the back surface 1G of the engine hooks 1 and 1 are parallel to the ZZ plane. The "Y direction" is a direction perpendicular to the Z direction and parallel to the surfaces of the front surface portion 101B and the back surface portion 101C of the cylinder head 101. The fixed engine hooks 1 and 1 are arranged on the diagonal line W apart from each other in the cylinder head 101. As a result, the operator or the like can stably suspend the engine 100 by using the two engine hooks 1 and 1 without using the four engine hooks. Here, the "X direction" shown in FIG. 1 is a direction perpendicular to the Z direction and the Y direction.

<Structural example of hanging tools 200 and 300>
Next, with reference to FIG. 2, structural examples of two types of hanger 200, 300 used in, for example, an engine production line will be sequentially described.
First, the structure of the first hanger 200 will be described with reference to FIG. 2 (A). The hanger 200 is also called an A-shaped hanger, and has a main member 201, chains 202, 203, and a J-shaped hanging member 204, 205. The main member 201 is attached to the rail side for transport movement of, for example, a production line. Each end portion 202B, 203B of the two chains 202, 203 is connected to the main member 201. The other ends 202C and 203C of the two chains 202 and 203 are connected to the hanging members 204 and 205, respectively.

Next, with reference to FIG. 2B, the structure of the second hanger 300, which is different from the first hanger 200, will be described. The second hanger 300, also called a B-shaped hanger, has a main member 301, chains 302, 303, J-shaped hanging members 304, 305, a connecting chain 306, and a connecting plate 307. .. The main member 301 is attached to the rail side for transport movement of, for example, a production line. The connecting chain 306 connects the main member 301 and the central position of the connecting plate 307. The connecting plate 307 has a symmetrical shape, and has left and right inclined portions 307B and 307B and a straight portion 307C. Each end portion 302B, 303B of the two chains 302, 303 is connected to the position of the left and right end portions of the connecting plate 307. The other ends 302C and 303C of the two chains 302 and 303 are connected to the hanging members 304 and 305, respectively.

The first hanger 200 and the second hanger 300 are arbitrarily selected and used according to the size and weight of the engine or the shape and size of the head cover 109 shown in FIG. The distance S between the hanging members 204 and 205 of the first hanger 200 is not fixed, and can be freely changed according to the distance between the engine hooks 1 and 1 shown in FIG. Further, the distance T between the hanging members 304 and 305 of the second hanging tool 300 is defined by the connecting plate 307. Therefore, the second suspending tool 300 is used when suspending an engine having a size corresponding to the interval T of the hanging members 304 and 305.

<Example of using engine hooks 1 and 1>
Next, a usage example of the engine hooks 1 and 1 will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the engine hooks 1 and 1 move in the production line together with the engine 100 in a state of being attached to the cylinder head 101 of the engine 100. Then, the engine 100 having the engine hooks 1 and 1 is mounted on the vehicle as it is. The engine hooks 1 and 1 are not removed from the cylinder head 101 unless otherwise specified.

As shown in FIG. 2A, when the engine 100 is hung by using the first hanger 200, the hanging members 204 and 205 are hooked on the first holes 20 and 20 of the engine hooks 1 and 1, respectively. Be done. As a result, the engine 100 is stably suspended by using the two engine hooks 1, 1 and the first suspending tool 200. Further, as shown in FIG. 2B, when the engine 100 is hung by using the second hanger 300, the hanging members 304 and 305 are placed in the second holes 30 and 30 of the engine hooks 1 and 1. Each is hooked. As a result, the engine 100 is stably suspended by using the two engine hooks 1, 1 and the second suspending tool 300.

Here, if the engine hook has only one hook hole and the design of the shape and size of the head cover, which is one of the components of the engine, is changed, a plurality of types of suspension are performed. It may be difficult to start the engine according to the ingredients. Therefore, it is difficult to change the design of engine components such as a head cover while supporting a plurality of types of hanging tools. This may reduce the degree of freedom in design.

As described above, the engine hook is not removed from the cylinder head 101 unless otherwise specified. Therefore, when the engine is mounted on a vehicle or the like and the cooling fan rotates, the cooling air generated by the cooling fan does not easily flow in the cylinder head region due to the presence of the engine hook. Therefore, the heat dissipation of the cylinder head of the engine may be deteriorated.

On the other hand, since the engine hooks 1 and 1 according to the present embodiment have the first hole portion 20 and the second hole portion 30, there are a plurality of types of hangers (first hanger 200 and second hanger 300). ), The engine 100 can be started. For example, as described above, the engine 100 can be hung on the first hanger 200 by using the first hole portion 20 having a circular hole on the upper side of the engine hooks 1 and 1, and the lower side of the engine hooks 1 and 1. The engine 100 can be hung on the second hanger 300 by using the second hole portion 30 having the elongated hole of the above. Therefore, even if the shape and size of the head cover 109, which is one of the components of the engine 100, are changed in design, a plurality of types of hanger 200, 300 can be used in the first hole 20 and the second hole 30. The engine 100 can be hung on the hangers 200 and 300 by hooking the engine 100 on the hanger. For example, when the head cover 109 hits the chains 202 and 203 of the first hanger 200 shown in FIG. 2 (A) due to the shape and size of the head cover 109, the second hanger 300 shown in FIG. 2 (B) is used. Can be used. In this way, the engine 100 can be lifted by using the first hanger 200 or the second hanger 300 according to the shape and size of the head cover 109 and the like. As a result, it is possible to suppress a decrease in the degree of freedom in designing the components of the engine 100 (for example, the head cover 109).

Further, when the cooling fan 103 of the engine 100 rotates, the cooling air generated by the cooling fan 103 cools, for example, the cylinder head 101 and the head cover 109. At this time, the engine hooks 1 and 1 can pass the cooling air of the cooling fan 103 by using the first hole portion 20 and the second hole portion 30, and the presence of the engine hooks 1 and 1 is present in the cooling fan 103. It is possible to suppress adverse effects on the passage of cooling air. That is, it is possible to prevent the two engine hooks 1 and 1 from obstructing the flow of the cooling air that is about to reach the cylinder head 101 and the head cover 109. As a result, it is possible to suppress a decrease in heat dissipation of the engine 100 and improve the durability of the engine 100.

As described above, the engine hooks 1 and 1 have a first hole portion 20 and a second hole portion 30. The ratio of the total opening area of the first hole portion 20 and the second hole portion 30 to the total surface area of the engine hooks 1 and 1 is preferably, for example, about 15% or more and 35% or less. As a result, the engine hooks 1 and 1 can increase the amount of cooling air passing through the cooling air by utilizing the first hole 20 and the second hole 30. This increases the surface area of the engine hooks 1 and 1 that are exposed to the cooling air. Therefore, it is possible to suppress a decrease in heat dissipation of the cylinder head 101 and the head cover 109 of the engine 100, and it is also possible to improve the heat dissipation of the engine hooks 1 and 1 themselves.

Next, the engine hooks according to the second to fourth embodiments of the present invention will be described with reference to FIG. When the components of the engine hooks according to the second to fourth embodiments are substantially the same as the components of the engine hook 1 of the first embodiment shown in FIG. 1, the same reference numerals are given to duplicate the description. Will be omitted as appropriate, and the differences will be mainly described below.
FIG. 3 is a diagram showing an engine hook according to another embodiment of the present invention.

(Second Embodiment)
FIG. 3A shows an engine hook 1A according to a second embodiment of the present invention. In the engine hook 1A according to the second embodiment, the first hole portion 20R has an elongated hole instead of a circular hole, and the second hole portion 30R has a circular hole. The engine 100 is hung on the first hanger 200 shown in FIG. 2A by using the first hole portion 20R having a long hole on the upper side of the engine hook 1A. Further, the engine 100 is hung on the second hanger 300 shown in FIG. 2B by using the second hole portion 30R having a circular hole on the lower side of the engine hook 1A. Therefore, even if the design of the head cover 109 of the engine 100 is changed, the engine 100 can be hung by a plurality of types of hangers 200 and 300.

(Third Embodiment)
FIG. 3B shows an engine hook 1B according to a third embodiment of the present invention. In the engine hook 1B according to the third embodiment, both the first hole portion 20 and the second hole portion 30S have the same circular hole. As shown in FIG. 3B, the inner diameter of the circular hole of the second hole portion 30S is larger than the inner diameter of the circular hole of the first hole portion 20. As a result, the engine 100 is hung on the first hanger 200 shown in FIG. 2 (A) by using the first hole portion 20 having a circular hole on the upper side of the engine hook 1B, and the engine 100 is mounted on the engine hook. The second hanger 300 shown in FIG. 2B is hung by using the second hole portion 30S having a circular hole on the lower side of 1B. Therefore, even if the design of the head cover 109 of the engine 100 is changed, the engine 100 can be hung by a plurality of types of hangers 200 and 300.

(Fourth Embodiment)
FIG. 3C shows the engine hook 1C according to the fourth embodiment of the present invention. In the engine hook 1C according to the fourth embodiment, both the first hole portion 20R and the second hole portion 30 have elongated holes instead of circular holes. The engine 100 is hung on the first hanger 200 shown in FIG. 2A by using the first hole portion 20R having the elongated hole on the upper side of the engine hook 1C. Further, the engine 100 is hung on the second hanger 300 shown in FIG. 2B by using the second hole portion 30 having a long hole on the lower side of the engine hook 1C. Therefore, even if the design of the head cover 109 of the engine 100 is changed, the engine 100 can be hung by a plurality of types of hangers 200 and 300.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of claims. The configuration of the above embodiment may be partially omitted or may be arbitrarily combined so as to be different from the above.
For example, the outer shape of the engine hooks 1 and 1 in the illustrated example may have a shape different from the shape described in this embodiment, for example, an elliptical shape or the like. Further, each of the first hole portion and the second hole portion is not limited to having a circular hole or an elongated hole, and may have holes having other shapes.

1, 1A, 1B, 1C: Engine hook, 1F: Front surface, 1G: Back surface, 2: Upper end, 3: Lower end, 4, 5: Side end, 6, 7: Inclined part, 8: End, 20 , 20R: 1st hole, 30, 30R, 30S: 2nd hole, 31: Upper semi-circular part, 32: Lower semi-circular part, 33, 34: Side part, 40: Bolt hole, 50: Fastening bolt, 100: Engine, 101: Cylinder head, 101B: Front part, 101C: Back part, 101R: Female thread part, 102: Cylinder block, 103: Cooling fan, 109: Head cover, 200: First hanger, 201: Main member , 202: Chain, 202B: One end, 202C: The other end, 203: Chain, 203B: One end, 203C: The other end, 204, 205: Hanging member, 300: Second hanger, 301: Main member, 302: Chain, 302B: One end, 302C: The other end, 303: Chain, 303B: One end, 303C: The other end, 304, 305: Hanging member, 306: Connecting chain, 307: Connecting plate, 307B: Inclined Part, 307C: Straight part

Claims (6)

An engine hook for hanging the engine on the hanger by being attached to the engine and hung on the hanger.
The first hole that can be hung on the first hanger,
A second hole that can be hung on a second hanger that is different from the first hanger,
An engine hook characterized by having. The first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, the first hole portion has a circular hole, and the second hole portion is an elongated hole. The engine hook according to claim 1, wherein the engine hook has. The first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, the first hole portion has an elongated hole, and the second hole portion is a circular hole. The engine hook according to claim 1, wherein the engine hook has. The engine hook according to claim 1, wherein the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine, and each has a circular hole. The engine hook according to claim 1, wherein the first hole portion and the second hole portion are arranged side by side in a state of being attached to the engine and have elongated holes, respectively. An engine having an engine hook for suspending the engine on the suspension by being attached to the engine and hung on the suspension.
The engine hook
The first hole that can be hung on the first hanger,
A second hole that can be hung on a second hanger that is different from the first hanger,
An engine having an engine hook, characterized in that it has.

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