Detachable body of internal combustion engine

Abstract

To enable attachment, storage and transportation of a detachable body of an internal combustion engine such as a cylinder liner while the detachable body is stably held. [Solution] This detachable body 1 is detachable from the base body 2 of the internal combustion engine, and has an attachment surface 3 provided on the outer peripheral surface 5 that can be attached to the base body 2 of the internal combustion engine, and a recess 4 provided on the outer peripheral surface 5 at a different axial position from the attachment surface 3.

Description

[Technical Field]

[0001] The present invention relates to a detachable body for an internal combustion engine. [Background technology]

[0002] For example, in an internal combustion engine such as a diesel engine, when a cylinder liner formed separately from the engine frame is attached to an engine frame such as a cylinder block, a large diameter portion and a small diameter portion are provided on the outer peripheral surface of the cylinder liner, and a step surface (shoulder surface) between the large diameter portion and the small diameter portion is provided, and this step surface is abutted against the axial end surface of the engine frame (see, for example, Patent Document 1 and Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-260959 [Patent Document 2] Japanese Patent Application Laid-Open No. 2006-312905 Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the inner circumferential surface of this type of cylinder liner is the sliding surface for the cylinder piston, it is necessary to hold the cylinder liner by its outer circumferential surface not only when attaching it to the base of the internal combustion engine, such as the engine frame, but also when storing or transporting it. In such cases, for example, the outer circumferential surface of a cylindrical cylinder liner with a fixed outer diameter is clamped, and the cylinder liner is held and attached to the engine frame using the frictional force generated by the clamp. However, it is difficult to stably hold the cylinder liner using the frictional force of the clamp alone.

[0005] As mentioned above, when the outer circumferential surface of a cylinder liner has a large diameter portion and a small diameter portion, it is possible to hold and transport the cylinder liner by suspending it using the step between the large diameter portion and the small diameter portion. However, since the mounting surface of the engine frame and the step described above naturally have a shape similar to that of the engine frame, they are not necessarily shaped to be suitable for suspended support, resulting in a problem of unstable posture when suspended.

[0006] The above-mentioned problem is not limited to cylinder liners, but can occur in any detachable body that requires handling similar to that of a cylinder liner and is detachable from the base of an internal combustion engine.

[0007] In view of the above circumstances, the technical problem to be solved in this specification is to enable the installation, storage, and transportation of a detachable body of an internal combustion engine, such as a cylinder liner, while the detachable body is stably held. [Means for solving the problem]

[0008] The above-mentioned problems are solved by a detachable body for an internal combustion engine according to the present invention. That is, this detachable body is detachable from a base body of an internal combustion engine, and is characterized in that it has a mounting surface provided on an outer circumferential surface for mounting to the base body of the internal combustion engine, and a recess provided on the outer circumferential surface at a position different in the axial direction from the mounting surface.

[0009] In this way, in the detachable body for an internal combustion engine according to the present invention, by providing a recess at a position axially different from the mounting surface to the base body of the internal combustion engine, the tip of a holding mechanism, such as a claw, can be inserted and hooked into the recess when it is in contact with the inner surface of the recess. This makes it easy to hold the detachable body. Furthermore, if the detachable body is held in the recess, it can be held in a more stable state than when it is held by friction with the cylindrical outer surface or by hooking onto a stepped surface, as in the conventional case. Therefore, according to the present invention, the detachable body can be attached, stored, and transported in a more stable state than in the conventional case.

[0010] In the detachable body according to the present invention, one of the bottom surface and both side surfaces constituting the recess, which is positioned on the upper side when attached to the base body, may have a flat shape.

[0011] By making the upper side of the pair of sides that make up the recess flat in this way, the contact area with the recess, i.e., the support area, can be increased by inserting a claw with a flat upper surface, and therefore this configuration makes it possible to hold the detachable body in a more stable state.

[0012] In the detachable body according to the present invention, the recessed portion may be one or more groove portions extending in the circumferential direction.

[0013] By forming the recess into one or more grooves extending in the circumferential direction, it is possible to facilitate the access direction of the support part such as the claw to the detachable body. In other words, it becomes possible to easily introduce the support part such as the claw into the recess without strictly controlling the orientation (phase) of the detachable body relative to the support part such as the claw.

[0014] In the detachable body according to the present invention, the recessed portion may be a plurality of holes arranged at predetermined intervals in the circumferential direction.

[0015] If the recesses are formed as a plurality of holes arranged at predetermined intervals in the circumferential direction, the support parts such as the claws can be inserted and supported more precisely into the recesses, thereby more firmly supporting (holding) the detachable body. Also, once held, there is no need to worry about the support parts such as the claws moving within the recesses, which also improves stability during holding.

[0016] In addition, in the detachable body according to the present invention, the outer peripheral surface may have a small diameter surface having a relatively small outer diameter dimension and a large diameter surface having a relatively large outer diameter dimension, and the mounting surface may be provided on the small diameter surface and the recess may be provided on the large diameter surface.

[0017] In this way, by providing a large diameter surface and a small diameter surface on the outer peripheral surface of the detachable body and providing a recess in the large diameter surface, for example, if the detachable body is a cylindrical body with a fixed inner diameter, the portion where the large diameter surface is provided can be made thicker than the portion where the small diameter surface is provided. Therefore, by providing a recess in the outer peripheral surface (large diameter surface) of the relatively thick portion, it is possible to ensure the necessary strength while allowing flexibility in the depth (radial dimension) of the recess. Of course, when an attachment surface is provided on the small diameter surface, the large diameter surface is often exposed from the base body, so this prevents a situation in which a support part such as a claw part interferes with the base body when attaching the detachable body to the base body, and makes it possible to introduce the detachable body into a predetermined position on the base body with the recess supported without any problems.

[0018] Furthermore, the detachable body described above may be suitably provided as a hanging structure for a detachable body, for example, having a recess in the detachable body, a plurality of claw portions that can be inserted into the recess, and a clamp arm that has the claw portions at the tip end and can clamp the detachable body with the claw portions as the claw portions are inserted.

[0019] By using the above-described hanging structure, the clamping action of the clamp arm allows each claw to be inserted into the corresponding recess, and each claw to be hooked and clamped into the recess. Therefore, the hanging structure of the present invention can hold the detachable body firmly in a stable position, and the holding action can be easily performed. [Effects of the Invention]

[0020] As described above, the detachable body of an internal combustion engine and the hanging structure for the detachable body according to the present invention make it possible to attach, store, and transport the detachable body of an internal combustion engine, such as a cylinder liner, while stably holding the detachable body. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a cross-sectional view of a detachable body of an internal combustion engine according to an embodiment of the present invention. [Figure 2] FIG. 2 is an external view of the detachable body shown in FIG. [Figure 3] 2 is a front view of the hanging structure of the detachable body shown in FIG. 1. [Figure 4] FIG. 4 is an enlarged view of the claw portion shown in FIG. 3. [Figure 5] 5 is a view of the claw portion shown in FIG. 4 as viewed from the direction of arrow A. FIG. [Figure 6] FIG. 10 is an external view of a detachable body according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] The following describes a detachable body and a suspension structure for the detachable body according to one embodiment of the present invention with reference to the drawings. In this embodiment, the detachable body is a cylinder liner of a diesel engine as an internal combustion engine, and the cylinder block is the base of the internal combustion engine.

[0023] Fig. 1 shows a cross-sectional view of a detachable body 1 according to one embodiment of the present invention. As shown in Fig. 1, the detachable body 1 is detachably attached to a base body 2 of an internal combustion engine (the object indicated by the two-dot chain line in Fig. 1), and in this embodiment, the outer periphery of the detachable body 1 (an attachment surface 3, which will be described later) is detachably attached to the inner periphery of a hole 2a provided in the base body 2.

[0024] The detachable body 1 has an attachment surface 3 that can be attached to the base body 2, and a recessed portion 4 that is provided at a different position in the axial direction from the attachment surface 3. In this embodiment, the detachable body 1 is cylindrical, and the outer peripheral surface 5 of the detachable body 1 has a small diameter surface 5a with a relatively small outer diameter dimension and a large diameter surface 5b with a relatively large outer diameter dimension. In this case, the attachment surface 3 is provided on the small diameter surface 5a, and the recessed portion 4 is provided on the large diameter surface 5b.

[0025] 1, when the outer peripheral surface 5 of the detachable body 1 has a step surface 5c between the small diameter surface 5a and the large diameter surface 5b, the mounting surface 3 is attached to the inner periphery of the hole 2a with this step surface 5c abutting in the axial direction against the axial end surface 2b that is connected to the open end of the hole 2a. In addition, in this embodiment, one or more flow paths 6 through which a coolant can flow are formed so as to penetrate the detachable body 1 in the axial direction and open to the step surface 5c and one axial end surface 7 of the detachable body 1.

[0026] In this embodiment, the recess 4 has a bottom surface 4a and a pair of side surfaces 4b, 4c extending radially from both axial sides of the bottom surface 4a. Of the pair of side surfaces 4b, 4c, at least the side surface 4b, which is located on the upper side when the detachable body 1 is attached to the base body 2, has a flat shape. Of course, as shown in FIG. 1, the other (lower) side surface 4c may also have a flat shape. Also, the bottom surface 4a may have a flat shape. In this embodiment, the flat bottom surface 4a extends along the axial direction of the detachable body 1. Furthermore, each of the side surfaces 4b, 4c extends along the radial direction of the detachable body 1.

[0027] 2 shows a side view (external view) of the detachable body 1. As shown in FIG. 2, in this embodiment, the recess 4 is a single groove 8 extending in the circumferential direction of the large diameter surface 5b. In this case, the axial cross section of the groove 8 always has the shape shown in FIG. 1. In other words, the depth of the groove 8 is constant in the circumferential direction.

[0028] Figure 3 shows a front view of a hanging structure 10 for suspending and supporting the detachable body 1 according to this embodiment. As shown in Figure 3, this hanging structure 10 includes a recess 4 provided in the detachable body 1 as one of its components, and is equipped with a plurality of claws 11 that can be inserted into the recess 4, and two or more (plural) clamp arms 12 each having a claw 11 at its tip end. In this embodiment, the hanging structure 10 is equipped with a pair of clamp arms 12, and each clamp arm 12 is provided with one claw 11 at its tip end.

[0029] 4 shows an enlarged view of the claw portion 11. In this embodiment, the upper end surface 11a of the claw portion 11 is flat, and when the claw portion 11 is inserted into the recess 4, the upper end surface 11a and one of the side surfaces 4b located on the upper side of the recess 4 are in surface contact. Furthermore, the tip surface 11b of the claw portion 11 is flat, and when the claw portion 11 is inserted into the recess 4, the bottom surface 4a of the recess 4 and the tip surface 11b of the claw portion 11 are in surface contact. In other words, the claw portion 11 and the recess 4 are in contact with each other on two surfaces (both states indicated by the two-dot chain line in FIG. 4).

[0030] In this embodiment, the claw portion 11 is arc-shaped (see Figure 5) and can be inserted into the recess 4 (groove portion 8) over a predetermined circumferential area and come into contact with the upper end surface 4b of the recess 4 (groove portion 8).

[0031] From the viewpoint of ease of insertion, it is desirable that the lower end surface 11c of the claw portion 11 and the other side surface 4c located below the recessed portion 4 are in a non-contact state when the claw portion 11 is inserted into the recessed portion 4, as shown in the figure. However, if the gap between the lower end surface 11c and the other side surface 4c is too large, it may cause the claw portion 11 to rattle, so it is advisable to set the thickness dimension of the claw portion 11 and the width dimension of the recessed portion 4 taking into consideration the above points.

[0032] As described above, in the detachable body 1 according to this embodiment, by providing the recess 4 at a position different from the mounting surface 3 on the base body 2 of the internal combustion engine, the claws 11 constituting the hanging structure 10 can be inserted and hooked onto the recess 4 when they are in contact with the inner surface (bottom surface 4a, upper end surface 4b) of the recess 4. This makes it easy to hold the detachable body 1. Furthermore, if the detachable body 1 is held in the recess 4, the detachable body 1 can be held in a more stable state than when the detachable body 1 is held by friction with the cylindrical outer peripheral surface or when it is held by hooking onto the stepped surface 5c, as in the conventional case. Therefore, the detachable body 1 according to this embodiment can be attached, stored, and transported in a more stable state than in the conventional case.

[0033] Furthermore, in this embodiment, the recess 4 is formed as a single groove 8 extending in the circumferential direction, so that the detachable body 1 can be easily held by inserting the claw 11 radially toward the recess 4 (groove 8) from any direction without strictly controlling the orientation (phase) of the detachable body 1. In addition, by forming the claw 11 in an arc-like shape (see FIG. 5), the contact area between the claw 11 and the recess 4 (more precisely, the support area of ​​one side surface 4b by the upper end surface 11a) can be increased, so that the detachable body 1 can be held in a more stable state.

[0034] Furthermore, in this embodiment, the hanging structure 10 for the detachable body 1 is configured with the recess 4 of the detachable body 1 described above, two claws 11 that can be inserted into the recess 4, and a pair of clamp arms 12 that each have one claw 11 on their tip side and can clamp the detachable body 1 with the claws 11 as the claws 11 are inserted, so that the clamping action of the pair of clamp arms 12 can insert each claw 11 into the recess 4 and hook and clamp each claw 11 into the recess 4. Therefore, the hanging structure 10 according to this embodiment can hold the detachable body 1 firmly in a stable position, and the holding action can be easily performed.

[0035] Although one embodiment of the present invention has been described above, the detachable body and its hanging structure according to the present invention can also have configurations other than those described above within the scope of the spirit thereof.

[0036] For example, in the above embodiment, the recess 4 is formed as a groove 8 extending over the entire circumference of the outer peripheral surface 5 of the detachable body 1 (see FIG. 3), but the shape of the groove 8 is not limited to this. For example, although not shown, the groove 8 may be divided into multiple regions along the circumferential direction of the outer peripheral surface 5. Alternatively, one groove 8 may be formed in a partial region in the circumferential direction of the outer peripheral surface 5.

[0037] Alternatively, the recessed portion 4 may have a shape other than the groove portion 8. Fig. 6 shows an external view of a detachable body 21 according to one example (another embodiment). As shown in this figure, the detachable body 21 according to this embodiment has a plurality of holes 22 arranged at predetermined intervals in the circumferential direction of the outer surface 5 as the recessed portions 4. In this case, although not shown in the figure, the detachable body 21 can be held by inserting claws having a cross-sectional shape corresponding to the hole portions 22 (here, a perfect circle shape) into the hole portions 22.

[0038] In this way, by forming the recess 4 as a plurality of holes 22 arranged at predetermined intervals in the circumferential direction, the claws can be inserted more precisely into the recess 4 (holes 22) to be supported, thereby more firmly holding the detachable body 1. Also, once held, there is no need to worry about the claws moving within the recess 4, which also improves stability during holding.

[0039] The shape of the hole 22 is arbitrary, and the shape of the claws in this case can also be any shape corresponding to the hole 22 as long as they can be inserted into the hole 22.

[0040] Of course, the shape of the recess 4 is not limited to a groove shape or a hole shape. Any opening shape of the recess 4 can be used. The same goes for the shape of the claw portion 11; the claw portion 11 can have any shape as long as it can be inserted into the recess 4 and hold the inner surface of the recess 4.

[0041] In the above explanation, the detachable body 1 according to the present invention is a cylinder liner that is attached to and detached from the cylinder block of a diesel engine, but the application of the present invention is not limited to this. The present invention can be applied to any type of detachable body as long as it can be attached to and detached from the base of an internal combustion engine. [Explanation of symbols]

[0042] 1 Detachable body 2 Base 2a Hole 2b Axial end face 3 Mounting surface 4 recess 4a Bottom 4b,4c side 5 Outer surface 5a Small diameter surface 5b Large diameter surface 5c Step surface 6 Flow path 7 One end surface in the axial direction 8 Groove 10. Structure 11 Claw 11a Upper end surface 11b Tip surface 11c Lower end surface 12 Clamp arm 13 Link mechanism 14 Connecting member 15 First Link 16 Second Link 21 Detachable body 22 Hole P1 First connection point P2 Second connection point P3 Third connection point X1 vertical axis

Claims

1. A detachable body that is detachable from a base body of an internal combustion engine, a mounting surface provided on an outer peripheral surface thereof and capable of being mounted to a base body of the internal combustion engine; a recess provided on the outer peripheral surface at a position different from the mounting surface in the axial direction; A detachable body of an internal combustion engine.

2. 2. The detachable body according to claim 1, wherein one of the bottom surface and both side surfaces constituting the recess, which is positioned on the upper side when attached to the attachment surface, has a flat shape.

3. The detachable body according to claim 1 , wherein the recessed portion is one or more grooves extending in a circumferential direction.

4. The detachable body according to claim 1 , wherein the recessed portions are a plurality of holes arranged at predetermined intervals in the circumferential direction.

5. the outer circumferential surface has a small diameter surface having a relatively small outer diameter dimension and a large diameter surface having a relatively large outer diameter dimension, the mounting surface is provided on the small diameter surface, The detachable body according to claim 1, wherein the recess is provided on the large diameter surface.

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