Limiting device for engine compartment door of engineering machinery and engineering machinery

Abstract

The utility model provides a limiting device for an engine compartment door of an engineering machine and the engineering machine, and the limiting device comprises a connecting plate which can rotate between a first rotating position and a second rotating position, and a through positioning hole is formed in the vertical side wall of an arc-shaped plate; one end of the connecting plate is fixedly connected to a cabin door, and the other end is rotatably connected to a frame of an engine cabin; the limiting mechanism is arranged on the frame of the engine compartment and comprises a telescopic rod which can move in a reciprocating mode between a first translation position and a second translation position in the horizontal extending direction relative to the engine compartment under the actuation of the connecting plate in the rotating state; when the connecting plate is located at the first rotating position, the cabin door is in a closed state; and the telescopic rod at the first translation position is ejected into the positioning hole of the connecting plate at the second rotation position, so that the cabin door is kept in an open state. According to the limiting device provided by the utility model, the horizontal positioning problem of the cabin door of the engine cabin can be solved.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery, and in particular to a limiting device for the engine compartment door of engineering machinery and the engineering machinery itself. Background Technology

[0002] Construction machinery is an important component of the equipment manufacturing industry. In general terms, construction machinery refers to the mechanical equipment necessary for comprehensive mechanized construction projects, including earthmoving, road construction and maintenance, mobile lifting and loading operations, and various building projects. It is mainly used in national defense construction, transportation infrastructure, energy industry construction and production, mining and other raw material industry construction and production, agriculture, forestry and water conservancy construction, industrial and civil construction, urban construction, and environmental protection.

[0003] This includes some common machines found in real life, such as excavators, scrapers, loaders, and bulldozers. Taking excavators as an example, excavators are divided into wheeled excavators, tracked excavators, and wheel-tracked excavators.

[0004] In the process of realizing this utility model, the inventors discovered that the prior art has at least the following problems:

[0005] For ease of explanation, let's take an excavator as an example. The engine compartment doors of most excavators are of the vertical flip-open type, which is inconvenient to operate and there is also a risk that the door may fall and injure the personnel who are inspecting the engine compartment; even if some doors use a horizontal opening and closing method, the way to keep the door in a certain position is still not convenient enough.

[0006] Therefore, there is a need for a limiting device for the engine compartment door of engineering machinery and engineering machinery in order to at least partially solve the above-mentioned technical problems. Summary of the Invention

[0007] This utility model provides a limiting device for the engine compartment door of engineering machinery and the engineering machinery itself, which can solve the problem of horizontal positioning of the engine compartment door.

[0008] In a first aspect, this utility model provides a limiting device for an engine compartment door of engineering machinery, the limiting device comprising:

[0009] A bent connecting plate, rotatable horizontally between a first rotational position and a second rotational position relative to the engine compartment, includes an arc-shaped plate at a middle position. The arc-shaped plate has a through-hole in its vertical sidewall. One end of the connecting plate is fixedly connected to the hatch, and the other end is rotatably connected to the frame of the engine compartment.

[0010] A limiting mechanism is provided to the frame of the engine compartment, the limiting mechanism including a telescopic rod, the telescopic rod being configured to reciprocate along a horizontally extending direction relative to the engine compartment between a first translational position and a second translational position under the actuation of a rotating connecting plate;

[0011] When the connecting plate is in the first rotational position, the hatch is in the closed position; when the telescopic rod is in the first translational position, it is inserted into the positioning hole of the connecting plate when it is in the second rotational position, so that the hatch is kept in the open position.

[0012] According to the limiting device of this utility model, when the connecting plate rotates horizontally between the first rotation position and the second rotation position, it drives the arc-shaped plate in the middle position of the connecting plate to move in conjunction with it, thereby changing the contact position between the telescopic rod and the vertical side wall of the arc-shaped plate. Under the actuation (or thrust) of the arc-shaped plate (connecting plate), the telescopic rod moves back and forth in the horizontal extension direction relative to the engine compartment between the first translation position and the second translation position, so that when the connecting plate is in the first rotation position, the hatch is closed, and when the connecting plate is in the second rotation position, the telescopic rod is pushed into the positioning hole, so that the hatch is kept open in the horizontal direction.

[0013] Secondly, this utility model also provides an engineering machinery, including the limiting device of the above-mentioned technical solution.

[0014] The engineering machinery according to this utility model, due to the adoption of the limiting device of this utility model, allows the hatch to rotate in the horizontal direction and remain in an open state under the limiting mechanism in the limiting device, making the hatch opening method more reasonable and safer.

[0015] The beneficial effects that can be obtained by utilizing the technical solution according to the embodiments of this utility model are at least as follows:

[0016] 1. The limiting device of this utility model, by setting a horizontally rotatable connecting plate including an arc-shaped plate located in the middle position and a limiting mechanism, realizes the closing and keeping the hatch open in the horizontal direction. It has a simple structure and is easy to operate.

[0017] 2. The limiting device of this utility model provides a through operating hole on the vertical side wall of the arc plate. When the connecting plate rotates to the second rotation position, the operating hole aligns with the fastener, so as to facilitate the assembly and disassembly of the fastener.

[0018] 3. The telescopic rod of this utility model is also provided with a push-pull handle at the position between the spring connection and the second protrusion. On the one hand, it is convenient to pull the telescopic rod that has been pushed into the positioning hole out of the positioning hole. On the other hand, when the telescopic rod is pushed into the positioning hole, the push-pull handle abuts against the second protrusion, and at this time the push-pull handle can also play a limiting role.

[0019] Additional advantages, objects, and features of this invention will be set forth in part in the description which follows, and will in part become apparent to those skilled in the art upon review of the description, or may be learned by practice of the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures specifically pointed out in the description and drawings.

[0020] Those skilled in the art will understand that the objectives and advantages achievable with this invention are not limited to those specifically described above, and that the above and other objectives achievable with this invention will become clearer from the following detailed description. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, do not constitute a limitation thereof. The components in the drawings are not drawn to scale but are merely for illustrating the principles of the present invention. For ease of illustration and description of certain parts of the present invention, corresponding portions in the drawings may be enlarged, i.e., may appear larger relative to other components in an exemplary device actually manufactured according to the present invention. In the drawings:

[0022] Figure 1 This is a schematic diagram of a limiting device (partial) according to an embodiment of the present utility model. In the schematic diagram, the connecting plate is rotated to the second rotation position, and the hatch connected to the connecting plate is in the open state. The limiting mechanism is also hidden in the figure.

[0023] Figure 2 This is another schematic diagram of a limiting device according to an embodiment of the present invention, in which the connecting plate is in a horizontally rotating state;

[0024] Figure 3 This is another schematic diagram of a limiting device according to an embodiment of the present utility model. In this schematic diagram, the connecting plate is rotated to the second rotation position, at which time the telescopic rod moves to the second translation position but has not yet entered the positioning hole.

[0025] Figure 4 This is another schematic diagram of a limiting device according to an embodiment of the present utility model. In this schematic diagram, the telescopic rod moves to the first translational position and is in the state of being inserted into the positioning hole.

[0026] Figure 5 for Figure 4 Another angle view of the structure shown also shows the mounting bracket and conceals the bolts;

[0027] Figure 6 This is a partial structural schematic diagram of a limiting device according to an embodiment of the present utility model, where the wrench is operating on the bolt.

[0028] Figure 7 This is a schematic diagram of the limiting mechanism in a limiting device according to an embodiment of the present invention;

[0029] Figure 8 This is an exploded view of the limiting mechanism in a limiting device according to an embodiment of the present invention;

[0030] Figure 9 This is a schematic diagram showing the relative positional distribution between the limiting device, the hatch, and the cover according to an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram illustrating the installation of a limiting device according to an embodiment of the present invention on a piece of engineering machinery (partially), with the hatch in a closed state; and

[0032] Figure 11 This is a schematic diagram of the installation of a limiting device according to an embodiment of the present invention on a piece of engineering machinery (partially), with the hatch in the open state at this time.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Limiting device;

[0035] 110. Connecting plate; 111. Arc-shaped plate; 112. Positioning hole; 113. Operating hole;

[0036] 120. Limiting mechanism; 121. Telescopic rod; 122. Spring; 123. Push-pull handle; 124. Pin hole; 125. Fixing pin;

[0037] 130. Mounting bracket; 131. Fixing part; 132. Adapter part; 133. Bolt hole; 134. Bolt;

[0038] 210. Cabin door;

[0039] 220. Frame; 221. First protrusion; 222. Second protrusion; 223. Third protrusion; 224. Bushing;

[0040] 230. Covering components;

[0041] 240. Wrench;

[0042] R2, second rotational position;

[0043] W1, first translation position;

[0044] W2, the second translation position. Detailed Implementation

[0045] The objectives and functions of this invention, as well as the methods for achieving these objectives and functions, will be clarified by referring to exemplary embodiments. However, this invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The purpose of this specification is merely to help those skilled in the art to comprehensively understand the specific details of this invention.

[0046] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof.

[0047] The ordinal numbers such as "first" and "second" used in this invention are merely identifiers and have no other meaning, such as a specific order. Furthermore, for example, the term "first component" does not imply the existence of "second component," and the term "second component" does not imply the existence of "first component."

[0048] It should be noted that the terms “up,” “down,” “front,” “back,” “left,” “right,” “inner,” “outer,” and similar expressions used in this article are for illustrative purposes only and are not intended to be limiting.

[0049] This utility model provides a limiting device 100 for the engine compartment door of construction machinery. The limiting device 100 can be applied to construction machinery, such as excavators, and can solve the problems of unreasonable opening and closing methods of existing engine compartment doors and the possibility of personnel collisions.

[0050] For ease of explanation, this embodiment uses an excavator as an example of construction machinery, but this is not a limitation; it can also be a scraper, loader, or bulldozer, etc.

[0051] A typical excavator generally consists of three main parts: the working device, the upper body, and the lower body. (See also...) Figure 10 and Figure 11 In this embodiment, the limiting device is located in the engine compartment at the bottom of the upper vehicle body, generally below and behind the driver's cab.

[0052] In a preferred embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, where Figure 1This is a schematic diagram of a limiting device (partial) according to an embodiment of the present utility model. In this schematic diagram, the connecting plate is rotated to the second rotation position, and the hatch connected to the connecting plate is in the open state. Figure 2 This is another schematic diagram of a limiting device according to an embodiment of the present invention, in which the connecting plate is in a horizontally rotating state; Figure 3 This is another schematic diagram of a limiting device according to an embodiment of the present invention. In this diagram, the connecting plate is rotated to a second rotational position, at which point the telescopic rod moves to a second translational position but has not yet entered the positioning hole. The limiting device 100 includes a connecting plate 110 and a limiting mechanism 120.

[0053] The connecting plate 110 is used to rotate the engine compartment door 210 and to arrange the positioning hole 112 of the limiting mechanism 120. The limiting mechanism 120 is used to cooperate with the positioning hole 112 to keep the door 210 in the open state.

[0054] Specifically, the connecting plate 110, which is generally bent in shape, includes an arc-shaped plate 111 at the middle position. The arc-shaped plate 111 has vertical sidewalls. (See reference) Figure 3 The curved plate 111 bends away from the limiting mechanism 120 (telescopic rod 121). It can be understood that, in order to connect with the hatch 210 and the engine compartment frame 220 (described below), corresponding connecting parts may also be provided at both ends of the connecting plate 110. The type of each connecting part is not limited and will not be described in detail here.

[0055] The connecting plate 110 is horizontally rotatable relative to the engine compartment between a first rotational position (not shown) and a second rotational position R2. The connecting plate 110 is rotatable at least 90° in the horizontal plane (i.e., between the first and second rotational positions R2), for example, 90°, 120°, or 150°. The arc-shaped plate 111 has a through-hole locating hole 112 on its vertical sidewall. One end of the connecting plate 110 is fixedly connected to the hatch 210. The other end of the connecting plate 110 is rotatably connected to the engine compartment frame 220 to allow horizontal rotation between the first and second rotational positions R2.

[0056] A limiting mechanism 120 is provided in the frame 220 of the engine compartment. The limiting mechanism 120 includes a telescopic rod 121. When the connecting plate 110 rotates horizontally relative to the engine compartment between a first rotational position and a second rotational position R2, the arcuate plate 111 also rotates accordingly. The end of the telescopic rod 121 near the arcuate plate 111 abuts against its vertical sidewall during at least part of the rotation of the arcuate plate 111. Due to the curved shape of the arcuate plate 111, the telescopic rod 121 reciprocates in the horizontally extending direction relative to the engine compartment between a first translational position W1 and a second translational position W2 under the actuation of the rotating connecting plate 110, or in other words, under the thrust of the arcuate plate 111.

[0057] In order to enable the telescopic rod 121 to reciprocate along the horizontal extension direction between the first translation position W1 and the second translation position W2, a spring 122 can also be fitted on the telescopic rod 121.

[0058] The working process of the limiting device 100 in this embodiment is as follows:

[0059] refer to Figure 10 With the hatch 210 in the closed position, the corresponding connecting plate 110 is in the first rotational position, and the telescopic rod 121 is in the first translational position W1. (Reference) Figure 2 Then, the hatch 210 is opened horizontally, and the entire connecting plate 110, including the curved plate 111, rotates horizontally outward. During the rotation of the curved plate 111, the end of the telescopic rod 121 closest to the curved plate 111 begins to abut against the vertical sidewall of the curved plate 111 at least at some point (or possibly throughout the entire rotation). Due to the curved shape of the curved plate 111, the telescopic rod 121, under the thrust of the curved plate 111, moves relative to the engine compartment to the second translational position W2 along the horizontal extension direction. (Reference) Figure 3 When the connecting plate 110 rotates to the second rotation position R2, the telescopic rod 121 also moves to the second translation position W2, at which point the telescopic rod 121 aligns with the positioning hole 112 on the arc-shaped plate 111. (Reference) Figure 4 Under the elastic force of the spring 122, the telescopic rod 121 quickly rebounds to the first translational position W1. At this time, the telescopic rod 121 is inserted into the positioning hole 112 of the connecting plate 110 when it is in the second rotational position R2, and the connecting plate 110 can no longer rotate, so that the hatch 210 is kept in the open state.

[0060] Based on the above-described scheme, according to the limiting device 100 of this utility model, through the horizontally rotatable connecting plate 110 and the limiting mechanism 120, the hatch 210 is closed when the connecting plate 110 is in the first rotation position, and the telescopic rod 121 is inserted into the positioning hole 112 when the connecting plate 110 is in the second rotation position R2, so that the hatch 210 is kept open.

[0061] refer to Figure 5 and Figure 9 On the right side of the engine compartment frame 220, a cover 230 is also provided, connected to the engine compartment frame 220 via a mounting bracket 130. The mounting bracket 130 may be an L-shaped bracket, including a fixing part 131 fixed to the cover 230 by fasteners and an adapter part 132 fixedly connected to the engine compartment frame 220. The fixing part 131 and the adapter part 132 may each be a vertical plate, connected together to form an L-shaped plate. The fixing part 131 may be fixed to the cover 230, for example, by bolts 134, and has corresponding bolt holes 133.

[0062] Continue to refer to Figure 5 and Figure 6 To facilitate the installation and removal of bolts 134 (e.g., tightening or loosening), the arc-shaped plate 111 may also have a through-hole 113 on its vertical sidewall, allowing relevant tools (e.g., wrench 240) to be operated through the through-hole 113. The through-hole 113 is closer to the hatch 210 than the positioning hole 112, providing ample working space. When the connecting plate 110 is rotated to the second rotation position R2, the through-hole 113 can be aligned with bolts 134.

[0063] refer to Figure 4 and Figure 7 To enable the telescopic rod 121 to reciprocate along the horizontal extension direction between the first translational position W1 and the second translational position W2, specifically, the telescopic rod 121 is movably mounted on the first protrusion 221 and the second protrusion 222 of the frame 220 of the engine compartment. The first protrusion 221 and the second protrusion 222 have through holes for matching the telescopic rod 121. A spring 122 is sleeved on the portion of the telescopic rod 121 between the first protrusion 221 and the second protrusion 222. One end of the spring 122 near the positioning hole 112 is connected to the telescopic rod 121. The other end of the spring 122 away from the positioning hole 112 movably abuts against the first protrusion 221. The connection between the end of the spring 122 near the positioning hole 112 and the telescopic rod 121 can be a fixed connection or a movable connection.

[0064] In a preferred embodiment, after the telescopic rod 121 is inserted into the positioning hole 112 of the arc-shaped plate 111 under the elastic force of the spring 122, for example, after relevant personnel have inspected or repaired the engine compartment, in order to facilitate the removal of the telescopic rod 121 from the positioning hole 112, a radially outward protruding gripping part can also be provided on the telescopic rod 121. The specific form of the gripping part is not limited; for example, it can be a rod body, a protrusion, or a plate body surrounding the telescopic rod 121.

[0065] Furthermore, the gripping part can be a push-pull handle 123 perpendicular to the telescopic rod 121. The push-pull handle 123 is positioned between the spring connection point and the second protrusion 222 of the telescopic rod 121. The spring connection point is the position where the end of the spring 122 near the positioning hole 112 is fixedly connected to the telescopic rod 121.

[0066] Furthermore, when the telescopic rod 121 is inserted into the positioning hole 112, the push-pull handle 123 can abut against the second protrusion 222.

[0067] refer to Figure 8To facilitate the assembly and disassembly of the limiting mechanism 120, the push-pull handle 123 can be a non-uniform diameter pin structure that is movably inserted into the telescopic rod 121. Correspondingly, the telescopic rod 121 is provided with a pin hole 124 for the pin to pass through. The other end of the pin passing through the telescopic rod 121 can be fixed by a fixing pin 125. The end of the spring near the positioning hole abuts against the push-pull handle 123 (pin).

[0068] refer to Figure 9 To achieve a rotatable connection between the connecting plate 110 and the engine compartment frame 220, the connecting plate 110 can be rotatably connected to the engine compartment frame 220 via a bushing 224. Correspondingly, the engine compartment frame 220 is provided with an outwardly protruding third protrusion 223 to facilitate connection with the connecting plate 110. It is understood that the rotatable connection between the connecting plate 110 and the third protrusion 223 can be, in addition to the bushing 224 type, a hinge, etc., which will not be listed here.

[0069] In summary, the limiting device 100 of this utility model, through a horizontally rotatable connecting plate 110 with a central arc-shaped plate 111 and a telescopic rod 121, enables the hatch 210 to be closed and kept open in the horizontal direction. The structure is simple and easy to operate. Simultaneously, a through-hole 113 is provided on the vertical sidewall of the arc-shaped plate 111, facilitating the assembly and disassembly of fasteners. Furthermore, a push-pull handle 123 is provided on the telescopic rod 121 between the spring connection and the second protrusion 222. This handle facilitates both retraction of the telescopic rod 121 from the positioning hole 112 and, when inserted into the positioning hole 112, also serves as a limiting mechanism, achieving multiple functions.

[0070] Secondly, this utility model also provides an excavator (not shown) including the limiting device 100 of the above embodiment.

[0071] Since the excavator according to the present utility model embodiment includes the limiting device 100 of the above embodiment, all the features and effects of the limiting device 100 are included here and will not be repeated.

[0072] Other embodiments of the present invention will be readily conceived and understood by those skilled in the art in conjunction with the description and practice disclosed herein. The description and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are defined by the claims.

Claims

1. A limiting device for an engine compartment door of engineering machinery, characterized in that, The limiting device includes: A bent connecting plate, rotatable horizontally between a first rotational position and a second rotational position relative to the engine compartment, includes an arc-shaped plate at a middle position. The arc-shaped plate has a through-hole in its vertical sidewall. One end of the connecting plate is fixedly connected to the hatch, and the other end is rotatably connected to the frame of the engine compartment. A limiting mechanism is provided to the frame of the engine compartment, the limiting mechanism including a telescopic rod, the telescopic rod being configured to reciprocate along a horizontally extending direction relative to the engine compartment between a first translational position and a second translational position under the actuation of a rotating connecting plate; When the connecting plate is in the first rotational position, the hatch is in the closed position; when the telescopic rod is in the first translational position, it is inserted into the positioning hole of the connecting plate when it is in the second rotational position, so that the hatch is kept in the open position.

2. The limiting device according to claim 1, characterized in that, The right side of the engine compartment frame is also provided with a cover that is connected to the engine compartment frame via a mounting bracket; the mounting bracket includes: Secured to the fixing part of the cover by fasteners; and A connecting part that is fixedly connected to the frame of the engine compartment; The arc-shaped plate is also provided with a through operating hole on its vertical sidewall; wherein, when the connecting plate is rotated to the second rotation position, the operating hole is aligned with the fastener to facilitate the assembly and disassembly of the fastener.

3. The limiting device according to claim 1, characterized in that, The connecting plate shown is rotatably connected to the frame of the engine compartment via a bushing or hinge.

4. The limiting device according to claim 1, characterized in that, The telescopic rod is movably mounted to a first protrusion and a second protrusion on the frame of the engine compartment. A spring is sleeved on the portion of the telescopic rod between the first protrusion and the second protrusion. One end of the spring near the positioning hole is connected to the telescopic rod, and the other end of the spring away from the positioning hole moves to abut against the first protrusion.

5. The limiting device according to claim 4, characterized in that, The telescopic rod is also provided with a gripping part that protrudes outward in a radial direction to facilitate the removal of the telescopic rod that has been inserted into the positioning hole.

6. The limiting device according to claim 5, characterized in that, The gripping part is constructed as a push-pull handle perpendicular to the telescopic rod, and the push-pull handle is positioned between the spring connection of the telescopic rod and the second protrusion; Furthermore, when the telescopic rod is inserted into the positioning hole, the push-pull handle abuts against the second protrusion.

7. The limiting device according to claim 6, characterized in that, The push-pull handle is constructed as a pin that can be movably inserted into the telescopic rod, and the end of the spring near the positioning hole abuts against the push-pull handle.

8. The limiting device according to claim 1, characterized in that, The connecting plate can rotate at least 90° in the horizontal plane.

9. The limiting device according to claim 1, characterized in that, The construction machinery mentioned refers to excavators, scrapers, loaders, or bulldozers.

10. An engineering machinery, characterized in that, Includes the limiting device as described in any one of claims 1 to 9.

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