A device for dismounting and mounting the intake and exhaust valves of a mining truck engine

Abstract

The utility model discloses a kind of for the dismounting device of mine truck engine intake and exhaust valve, it is related to engine maintenance tool technical field, the dismounting device includes: the bottom plate suitable for being placed in engine cylinder cover combustion chamber to resist valve;The cover plate suitable for being placed in cylinder cover outside to compress valve spring upper seat;Screw rod suitable for sequentially passing through the bottom plate, fuel injector mounting hole of engine cylinder cover and the cover plate;And the threaded end of screw rod is rotated and connected, and nut for applying pressure to the cover plate;Wherein, the tail end of screw rod is provided with anti-rotation cooperation structure between the bottom plate, this anti-rotation cooperation structure is used to prevent the screw rod relative to the bottom plate rotates when screwing the nut, the utility model is through the synergies of anti-rotation cooperation structure and friction-reducing component, single person can be safely, labor-saving, efficiently operated, and maintenance safety risk is significantly reduced.

Description

Technical Field

[0001] This utility model relates to the field of engine repair tools, and in particular to a device for disassembling and assembling intake and exhaust valves of mining truck engines. Background Technology

[0002] In the engine maintenance of open-pit mining trucks (such as the XDE240 truck's 16V4000C23R engine), the removal and installation of intake and exhaust valves is a common but high-risk operation. Each cylinder head typically contains multiple valves, valve springs, valve spring seats, and valve lock clips. During removal and installation, tools must be used to compress the valve springs in order to remove or install the valve lock clips.

[0003] Traditional disassembly and assembly methods typically rely on levers or simple tools, requiring operators to apply considerable force to compress the spring. This approach poses serious safety hazards: firstly, the strong spring force is difficult to control precisely, easily causing the spring or related parts (such as the spring seat or locking clip) to suddenly eject, resulting in damage to parts or serious personal injury; secondly, traditional tools are inefficient, often only allowing operation on a single valve, and the operation is laborious, requiring multiple people to cooperate, significantly extending engine maintenance time.

[0004] In view of the above problems, there is an urgent need for a new type of disassembly and assembly device for the intake and exhaust valves of mining truck engines to overcome the above technical defects. Utility Model Content

[0005] In view of this, this application provides a device for disassembling and assembling the intake and exhaust valves of a mining truck engine. The main objective is to solve the problems of existing tools being laborious to operate, inefficient, prone to screw rotation, and posing safety hazards, thereby achieving safe, labor-saving, and efficient single-person disassembly and assembly operations.

[0006] This utility model provides a device for disassembling and assembling intake and exhaust valves of a mining truck engine, comprising: a base plate adapted to be placed in the combustion chamber of the engine cylinder head to block the valves; a cover plate adapted to be placed outside the cylinder head to press the valve spring seat; a screw adapted to pass sequentially through the base plate, an injector mounting hole in the engine cylinder head, and the cover plate; and a nut screwed onto the threaded end of the screw and adapted to abut against the outside of the cover plate to apply pressure to the cover plate; wherein the core structure is that an anti-rotation engagement structure is provided between the tail end of the screw and the base plate, which is used to prevent the screw from rotating relative to the base plate when the nut is tightened.

[0007] Furthermore, the anti-rotation mating structure includes: a non-circular head disposed at the tail end of the screw, and a non-circular groove formed on the base plate that is adapted to the non-circular head.

[0008] Furthermore, the non-circular head is a square head, and the non-circular groove is a square groove. Through this structure, when the operator tightens the nut, the anti-rotation fit structure (such as the square head at the end of the screw engaging with the square groove on the base plate) ensures that the screw body is firmly locked and will not rotate freely with the nut. This allows the operator to tighten the nut in one direction using only one tool (such as a wrench), achieving safe single-person operation.

[0009] Furthermore, the friction reduction assembly includes a pressure bearing and a wear-resistant gasket; both the pressure bearing and the wear-resistant gasket are sleeved on the screw; the pressure bearing is disposed between the nut and the wear-resistant gasket, and the wear-resistant gasket is disposed between the pressure bearing and the cover plate. In this application, the pressure bearing is used to significantly reduce the rotational friction torque, and the wear-resistant gasket is used to protect the surface of the cover plate from wear by the pressure bearing, thereby extending the tool life.

[0010] Furthermore, the cover plate has at least one stepped hole, the larger end of which is used to press against the valve spring seat. In an embodiment for multi-valve (such as the four-valve XDE240 engine), preferably, the cover plate has four stepped holes symmetrically provided for simultaneously pressing against the four valve spring seats. This design is reasonable and can achieve simultaneous synchronous operation of the four valves.

[0011] Furthermore, the nut is a flange nut.

[0012] Furthermore, the thickness of the base plate matches the depth of the engine cylinder head combustion chamber.

[0013] Furthermore, the inner wall of the small end of the stepped hole of the cover plate is provided with an elastic buffer layer. The elastic buffer layer is made of rubber or silicone material and is used to provide buffer protection when the valve stem passes through, so as to prevent damage to the valve stem.

[0014] Furthermore, the screw is provided with scale markings to indicate the tightness of the nut, thereby precisely controlling the compression of the valve spring and improving the accuracy and safety of disassembly and assembly operations.

[0015] Beneficial effects This application, through the synergistic effect of the "anti-rotation fit structure" and the "friction reduction component", allows operators to tighten the nut smoothly and effortlessly, precisely control the compression and release of the spring, and completely solve the safety hazard of the spring suddenly popping out in the traditional method.

[0016] The anti-rotation structure in this application prevents the screw from spinning freely, allowing operators to perform efficient single-person operations using only one hand and a wrench. Simultaneously, the cover plate can be designed to compress multiple valve springs simultaneously, significantly improving maintenance efficiency compared to single-point operation. Furthermore, the pressure bearing in this application transforms high-friction sliding rotation into low-friction rolling rotation, greatly reducing the torque required to tighten the nut and making operation easy and convenient.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0019] In the attached diagram: Figure 1 A schematic diagram of the overall structure of the disassembly and assembly device for the intake and exhaust valves of a mining truck engine provided in an embodiment of the present invention is shown. Figure 2 A schematic diagram of the base plate of the disassembly and assembly device provided in an embodiment of this utility model is shown; Figure 3 A schematic diagram of the cover plate of the disassembly and assembly device provided in an embodiment of the present invention is shown; Figure 4 This diagram illustrates the structural state of the disassembly and assembly device provided in this embodiment of the present invention. Figure 5 An exploded structural diagram of the cylinder head valve mechanism of the XDE240 truck engine provided in an embodiment of the present invention is shown.

[0020] Icon labels: 1-Base plate; 2-Cover plate; 3-Screw; 4-Flange nut; 5-Pressure bearing; 6-Wear gasket; 11-Intake valve; 12-Exhaust valve; 13-Cylinder head; 15-Inner spring; 16-Outer spring; 17-Valve spring seat; 8-Valve lock clip.

[0021] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example like Figure 1-5 The preferred embodiments of the present invention will be described in detail below.

[0026] In one feasible implementation, such as Figure 1 As shown, this utility model provides a disassembly and assembly device for the intake and exhaust valves of an open-pit mining truck engine. The device mainly includes: a base plate 1, a cover plate 2, a screw 3, a flange nut 4, a pressure bearing 5, and a wear-resistant gasket 6.

[0027] In this embodiment, such as Figure 2 and Figure 3 as well as Figure 5As shown, the base plate 1 is adapted to be placed in the combustion chamber of the engine cylinder head to block the valves. There are four valves: two intake valves 11 and two exhaust valves 12. The base plate 1 is a circular iron plate with a thickness (e.g., 18 mm) matching the combustion chamber depth of the adapted engine (e.g., an XDE240 truck engine). An anti-rotation fitting structure is provided between the tail end of the screw 3 and the base plate 1. This anti-rotation fitting structure prevents the screw 3 from rotating relative to the base plate 1 when the nut 4 is tightened. The base plate 1 has a non-circular groove machined at its center. The anti-rotation fitting structure includes a non-circular head at the tail end of the screw 3 and a non-circular groove on the base plate 1 that matches the non-circular head. In this embodiment, the non-circular groove is preferably a square groove (e.g., 30 mm long, 20 mm wide, and 8 mm deep), with a through hole (e.g., 20 mm in diameter) machined at the center of the bottom of the square groove for the screw 3 to pass through.

[0028] In one feasible embodiment, the cover plate 2 is also a circular iron plate, adapted to be placed outside the cylinder head to press the valve spring upper seat 17. The cover plate 2 has a through hole (e.g., 20 mm in diameter) at its center for the threaded rod 3 to pass through. Four stepped holes are symmetrically machined on the cover plate 2 for simultaneously pressing four of the valve spring upper seats 17. The larger end of the stepped hole on the cover plate 2 (e.g., 50 mm in diameter, 10 mm deep) is used to accommodate and press the valve spring upper seat 17 during operation, while the smaller end of the stepped hole on the cover plate 2 (e.g., 32 mm in diameter) is a through hole to expose the valve stem tip for operating the valve lock clip 18.

[0029] In one feasible implementation, an elastic buffer layer is provided on the inner wall of the small end of the stepped hole of the cover plate 2. The elastic buffer layer is made of rubber or silicone material and is used to provide buffer protection when the valve stem passes through, so as to prevent damage to the valve stem.

[0030] In one feasible embodiment, the screw 3 is a long rod adapted to pass sequentially through the base plate 1, the injector mounting hole of the engine cylinder head 13, and the cover plate 2. One end of the screw 3 is a threaded end (e.g., 18mm in diameter), and the other end (tail end) is welded with a square head that matches the square groove on the base plate 1.

[0031] In one feasible embodiment, the flange nut 4 is a heavy-duty flange nut with an inner diameter matching the threaded end of the screw 3. It is screwed onto the threaded end of the screw 3 to apply pressure to the cover plate 2. A friction-reducing assembly is provided between the nut 4 and the cover plate 2. The friction-reducing assembly includes a pressure bearing 5 and a wear-resistant gasket 6. Specifically, the inner diameters of both the pressure bearing 5 and the wear-resistant gasket 6 are larger than the diameter of the screw 3, so that both the pressure bearing 5 and the wear-resistant gasket 6 can be fitted onto the screw 3. The wear-resistant gasket 6 is attached to the end of the cover plate 2 away from the base plate 1; the pressure bearing 5 is attached to the end of the wear-resistant gasket 6 away from the cover plate 2; and the flange end of the nut 4 abuts against the pressure bearing 5.

[0032] In one feasible implementation, the screw 3 is provided with scale markings to indicate the tightness of the nut 4, thereby precisely controlling the compression of the valve spring and improving the accuracy and safety of disassembly and assembly operations.

[0033] In one feasible implementation, such as Figure 4As shown, the disassembly and assembly method of this device is as follows: 1. Install base plate 1: Place cylinder head 13 on its side and place base plate 1 into the combustion chamber of cylinder head 13, ensuring that the square groove end of base plate 1 faces outward (reverse injector mounting hole), and adjust its position so that it can stably block the bottom of the four valves (i.e., the two intake valves 11 and the two exhaust valves 12). 2. Insert screw 3: Insert the threaded end of screw 3 through the through hole of base plate 1, and then pass it through the center through hole of the injector mounting hole of cylinder head 13. 3. Lock screw 3: Adjust the position of screw 3 and base plate 1 so that the square head of screw 3 is fully embedded in the square groove of base plate 1. At this time, screw 3 is locked by base plate 1 and cannot rotate, which is the realization of the anti-rotation fit structure. Place cylinder head 13 upright, and then place valve spring lower seat, valve spring, and valve spring upper seat in sequence. IV. Installing Cover Plate 2: Place the cover plate 2 on the other side (spring side) of the cylinder head 13, aligning the large ends of the four stepped holes with and pressing them onto the four valve spring seats 17. V. Installing and Compressing Components: Insert the wear-resistant washer 6 and pressure bearing 5 sequentially onto the threaded end of the screw 3 protruding from the cover plate 2, and finally screw on the flange nut 4. VI. Performing the Operation: The operator uses a wrench to tighten the flange nut 4. Since the screw 3 is locked by the square head and square groove and will not spin freely, and the pressure bearing 5 minimizes friction, the operator can tighten the nut 4 with one hand, smoothly, and effortlessly. The flange nut 4 presses down on the cover plate 2 through the pressure bearing 5 and the wear-resistant washer 6, while the cover plate 2 simultaneously and evenly compresses the four valve springs (i.e., the two inner springs 15 and the two outer springs 16) until the valve lock clip 18 is fully exposed. VII. Removing and Installing the Locking Clip: With the valve springs (i.e., the two inner springs 15 and the two outer springs 16) safely compressed, the operator can safely remove or install the valve locking clip 18. VIII. Release: Slowly rotate the flange nut 4 in the reverse direction to smoothly release the spring pressure, and finally remove all tools in sequence.

[0034] In summary, this utility model, by adding an "anti-rotation mating structure" (square head and square groove) and a "friction reduction component" (pressure bearing and gasket), perfectly solves the problems of easy screw rotation, laborious and dangerous operation in the prior art, and realizes safe, efficient and labor-saving single-person operation.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art may further combine or substitute the present utility model, as long as it does not depart from the content of the technical solution of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model. When some changes or alterations are made to the above-mentioned technical content to form equivalent embodiments, the implementation schemes in the above embodiments are also within the scope of the present utility model.

Claims

1. A device for disassembling and assembling intake and exhaust valves of a mining truck engine, characterized in that, include: A base plate (1), said base plate (1) is adapted to be placed in the combustion chamber of the engine cylinder head to block the valves; Cover plate (2), said cover plate (2) is adapted to be placed outside the cylinder head to press against the valve spring seat (17); The screw (3) is adapted to pass sequentially through the base plate (1), the injector mounting hole of the engine cylinder head, and the cover plate (2); Nut (4), which is screwed onto the threaded end of the screw (3) to apply pressure to the cover plate (2); The screw (3) is provided with an anti-rotation fit structure between its tail end and the base plate (1) to prevent the screw (3) from rotating relative to the base plate (1) when the nut (4) is tightened.

2. The apparatus according to claim 1, characterized in that, The anti-rotation mating structure includes: a non-circular head provided at the tail end of the screw (3), and a non-circular groove provided on the base plate (1) that is adapted to the non-circular head.

3. The apparatus according to claim 2, characterized in that, The friction reduction assembly includes a pressure bearing (5) and a wear-resistant pad (6); The pressure bearing (5) and the wear-resistant gasket (6) are both sleeved on the screw (3); The pressure bearing (5) is disposed between the nut (4) and the wear-resistant gasket (6), and the wear-resistant gasket (6) is disposed between the pressure bearing (5) and the cover plate (2).

4. The apparatus according to claim 3, characterized in that, At least one stepped hole is provided on the cover plate (2), and the larger end of the stepped hole is used to press on the valve spring seat (17).

5. The apparatus according to claim 4, characterized in that, The cover plate (2) has four stepped holes symmetrically arranged on it, which are used to simultaneously press the four valve spring seats (17).

6. The apparatus according to claim 3, characterized in that, The nut (4) is a flange nut.

7. The apparatus according to claim 2, characterized in that, The non-circular head is a square head, and the non-circular groove is a square groove.

8. The apparatus according to claim 1, characterized in that, The thickness of the base plate (1) is matched with the depth of the combustion chamber of the engine cylinder head.

9. The apparatus according to claim 4, characterized in that, The inner wall of the small end of the stepped hole of the cover plate (2) is provided with an elastic buffer layer, which is made of rubber or silicone material.

10. The apparatus according to claim 1, characterized in that, The screw (3) is provided with scale markings to indicate the tightness of the nut (4).

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