Opening and closing device of cab door

Abstract

The utility model discloses a cab door opening and closing device which comprises a proximity switch detachably installed on a cab door frame stand column and a trigger assembly installed on a cab door, the induction face of the proximity switch is arranged in the vertical direction, and after the trigger assembly rotates along the rotating axis of the cab door, the proximity switch is driven by the trigger assembly to rotate. The trigger assembly is close to the induction face of the proximity switch to trigger the proximity switch, and the trigger area of the trigger assembly is larger than the area of an induction area on the induction face of the proximity switch. The trigger mode of the proximity switch and the trigger assembly is set to be the mode that the trigger assembly presses the induction face, and the trigger area of the trigger assembly is larger than the area of the induction area on the induction face of the proximity switch, so that the trigger reliability and sensitivity are improved, and the trigger plate and the installation plate are prevented from interfering with each other; the trigger plate has elasticity and is convenient to process, the overall process of the trigger assembly is simplified, and the service life of the part is prolonged by arranging the elastic block.

Description

Technical Field

[0001] This utility model relates to a driver's cab door opening and closing device, belonging to the technical field of engineering machinery. Background Technology

[0002] Construction machinery operates in harsh environments with complex conditions, making the safety and reliability of the cab paramount. The door's opening and closing mechanism directly impacts this reliability. Therefore, the cab door's opening and closing mechanism has become a crucial indicator of a high-end machine's performance. Consequently, construction machinery manufacturers are rapidly optimizing and upgrading the cab door's opening and closing mechanism to maximize cab safety and reliability. Thus, the door's opening and closing mechanism must operate reliably, providing effective electrical control and protecting the operator's safety.

[0003] The existing cab door opening and closing mechanism uses a proximity switch and a baffle sensor. The baffle moves parallel to the proximity switch's sensing surface to above it, thus opening and closing the cab door. However, this up-and-down sensing method can be problematic due to manufacturing errors. For example, if the baffle's trigger surface is too small when it contacts the proximity switch, the sensing sensitivity may be reduced. Alternatively, if the baffle is too close to the sensing surface, interference may occur, preventing the cab door from opening or closing and reducing the reliability of the trigger. Furthermore, the installation process for the proximity switch is complex, requiring the bracket to be installed first, followed by the proximity switch on the bracket, and then a sealing plate to be installed on the outside of the proximity switch. This process is complicated, with numerous components, and the installed proximity switch is too large, occupying a lot of space. During long-term operation, the fastening bolts of this proximity switch may loosen due to vibration, reducing the sensing sensitivity of the proximity switch and affecting the safety and reliability of the cab, thus compromising the personal safety of the operator. Summary of the Invention

[0004] Purpose of the invention: To solve the above-mentioned technical problems, this utility model provides a driver's cab door opening and closing device. This device improves reliability and sensitivity and avoids interference by changing the existing method of horizontally sliding the trigger component towards the sensing surface to the method of pressing the trigger component towards the sensing surface.

[0005] Technical solution: A switch for a cab door includes a proximity switch detachably mounted on the cab door frame pillar and a triggering component mounted on the cab door. The sensing surface of the proximity switch is arranged vertically. After the triggering component rotates along the rotation axis of the cab door, it approaches the sensing surface of the proximity switch to trigger the proximity switch. The triggering area of ​​the triggering component is larger than the sensing area on the sensing surface of the proximity switch.

[0006] This invention sets the triggering method of the proximity switch and the triggering component to be pressed into the sensing surface. Compared with the existing method of the triggering component sliding horizontally into the sensing surface, this solution can still trigger the opening and closing of the cab door even if the distance between the two is too close, and even if the distance between the two is too far, the opening and closing of the cab door can be triggered by the triggering component with a large triggering area. This improves sensitivity and reliability, and is simple to install.

[0007] In a preferred embodiment, for the purpose of installing the triggering component, the triggering component includes an interconnected mounting plate and a triggering plate, the mounting plate being connected to the cab door, and the triggering surface of the triggering plate being arranged in a vertical direction.

[0008] By setting the trigger surface vertically, even if the trigger surface comes into contact with the proximity switch sensing surface due to machining errors, the pressure concentration component will not be damaged due to non-face-to-face contact.

[0009] In a preferred embodiment, to make the trigger plate flexible and easy to process, the trigger plate has a bent structure, including a bent trigger part and a first connecting part, wherein the first connecting part is bent and connected to the mounting plate.

[0010] Setting the trigger plate as a bent structure not only facilitates processing, but also allows for elastic deformation when it comes into contact with the sensing surface due to processing errors, preventing component damage caused by rigid contact and improving reliability.

[0011] In a preferred embodiment, to facilitate the processing of the mounting plate, the mounting plate has a bent structure, including a bent mounting part and a second connecting part, wherein the first connecting part is connected to the second connecting part, and the mounting part is connected to the cab door.

[0012] By designing the mounting plate as a bent structure, it is easy to weld it to the cab door and to connect it to the trigger plate, thus simplifying the overall process of the trigger assembly.

[0013] In a preferred embodiment, to reduce component wear caused by rigid contact between the trigger component and the proximity switch due to processing errors, an elastic block is provided on the outer side of the sensing area on the sensing surface of the proximity switch, and the trigger component abuts against the elastic block after approaching the sensing surface of the proximity switch.

[0014] After the elastic block is installed, when the trigger component comes into contact with the proximity switch, the elastic block can buffer the pressure and extend the service life of the component.

[0015] Preferably, to simplify the installation of the proximity switch, the proximity switch is an integrated structure and is detachably connected to the cab door frame pillar via bolts and nuts.

[0016] The proximity switch is designed as an integrated structure, requiring no additional processing. It can be used directly after being installed on the cab door frame pillar with bolts and nuts. Compared to existing proximity switches that require further assembly, this solution offers a simpler installation process, smaller size, and higher reliability due to vehicle vibrations during operation.

[0017] Beneficial effects: This utility model improves the reliability and sensitivity of triggering by setting the triggering method of the proximity switch and the triggering component to press the triggering component into the sensing surface, and the triggering area of ​​the triggering component is larger than the sensing area on the sensing surface of the proximity switch, thus avoiding interference between the two. The triggering plate and the mounting plate are set as a bent structure, which makes the triggering plate elastic and easy to process, simplifying the overall process of the triggering component. The elastic block is set to extend the service life of the component. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the existing technology;

[0020] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the proximity switch of this utility model;

[0022] Figure 4 This is a schematic diagram of the triggering component of this utility model. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] like Figure 1 The diagram shows the existing technology of moving a baffle parallel to the proximity switch sensing surface to above the sensing surface to realize the opening and closing of the cab door.

[0027] like Figures 2-4 As shown, a switch device for a cab door includes a proximity switch 1 detachably mounted on the cab door frame pillar and a trigger component 2 mounted on the cab door. The sensing surface of the proximity switch 1 is arranged in a vertical direction. After the trigger component 2 rotates along the rotation axis of the cab door, it approaches the sensing surface of the proximity switch 1 to trigger the proximity switch 1. The triggering area of ​​the trigger component 2 is larger than the sensing area on the sensing surface of the proximity switch 1.

[0028] By setting the triggering method of proximity switch 1 and triggering component 2 to be pressed into the sensing surface, compared to the existing method of triggering component 2 sliding horizontally into the sensing surface, this solution can still trigger the opening and closing of the cab door even if the distance between them is too close, and even if the distance between them is too far, the opening and closing of the cab door can still be triggered by the triggering component 2 with its large triggering area. This improves sensitivity and reliability, and is simple to install with high reliability. In this embodiment, the triggering component 2 determines the opening and closing status of the cab door through electromagnetic induction after approaching proximity switch 1.

[0029] To enable the installation of the trigger assembly 2, the trigger assembly 2 includes an installation plate 21 and a trigger plate 22 that are connected to each other. The installation plate 21 is connected to the cab door, and the trigger surface of the trigger plate 22 is arranged in the vertical direction.

[0030] By setting the trigger surface vertically, even if the trigger surface comes into contact with the sensing surface of proximity switch 1 due to machining errors, the pressure concentration component will not be damaged due to non-face-to-face contact.

[0031] In order to make the trigger plate 22 flexible and easy to process, the trigger plate 22 has a bent structure, including a bent trigger part 221 and a first connecting part 222, and the first connecting part 222 is bent and connected to the mounting plate 21.

[0032] Setting the trigger plate 22 as a bent structure not only facilitates processing, but also produces elastic deformation when it comes into contact with the sensing surface due to processing errors, thus preventing component damage caused by rigid contact and improving reliability.

[0033] To facilitate the processing of the mounting plate 21, the mounting plate 21 has a bent structure, including a bent mounting part 211 and a second connecting part 212. The first connecting part 222 is connected to the second connecting part 212, and the mounting part 211 is connected to the cab door.

[0034] The mounting plate 21 is designed as a bent structure, which facilitates its welding to the cab door and its connection to the trigger plate 22, simplifying the overall manufacturing process of the trigger assembly 2. In this embodiment, the mounting plate 21 and the trigger plate 22 are an integral bent structure. Example 1

[0035] In order to reduce component wear caused by rigid contact between the trigger component 2 and the proximity switch 1 due to processing errors, an elastic block 3 is provided on the outer side of the sensing area on the sensing surface of the proximity switch 1, and the trigger component 2 abuts against the elastic block 3 after approaching the sensing surface of the proximity switch 1.

[0036] With the elastic block 3 installed, when the trigger component 2 comes into contact with the proximity switch 1, the elastic block 3 can buffer the pressure and extend the service life of the component. In this embodiment, the elastic block 3 is made of rubber. Example 2

[0037] To simplify the installation of proximity switch 1, proximity switch 1 is an integral structure that is detachably connected to the cab door frame column via bolts and nuts.

[0038] The proximity switch 1 is directly set as an integrated structure, without the need for additional processing. It can be used directly after being installed on the door frame pillar of the cab with bolts and nuts. Compared with the existing proximity switch 1, which requires further assembly, the installation process of the proximity switch 1 in this solution is simple, the size is small, and the integrated structure has higher reliability when the vehicle vibrates during operation.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A door opening and closing device for a cab, characterized by: The application relates to a proximity switch (1) detachably mounted on a door frame upright column of a cab, and a trigger assembly (2) mounted on a cab door, wherein the sensing surface of the proximity switch (1) is arranged in a vertical direction, the trigger assembly (2) rotates along the rotation axis of the cab door, and the trigger assembly (2) approaches the sensing surface of the proximity switch (1) to trigger the proximity switch (1), and the trigger area of the trigger assembly (2) is larger than the sensing area on the sensing surface of the proximity switch (1).

2. The door opening and closing device for a cab according to claim 1, characterized by: The trigger assembly (2) comprises a mounting plate (21) and a trigger plate (22) connected with each other, the mounting plate (21) is connected with the cab door, and the trigger surface of the trigger plate (22) is arranged in a vertical direction.

3. A cab door opening and closing device according to claim 2, characterized in that: The trigger plate (22) is a bending structure and comprises a trigger part (221) and a first connecting part (222) connected by bending, and the first connecting part (222) is connected with the mounting plate (21) by bending.

4. The cab door opening and closing apparatus according to claim 3, characterized by: The mounting plate (21) is a bending structure and comprises a mounting part (211) and a second connecting part (212) connected by bending, the first connecting part (222) is connected with the second connecting part (212), and the mounting part (211) is connected with the cab door.

5. The cab door opening and closing apparatus according to claim 1, characterized by: The outer side of the sensing area on the sensing surface of the proximity switch (1) is provided with an elastic block (3), and the trigger assembly (2) abuts against the elastic block (3) after approaching the sensing surface of the proximity switch (1).

6. The cab door opening and closing apparatus according to claim 1, characterized by: The proximity switch (1) is an integral structure and is detachably connected with the door frame upright column of the cab through a bolt and a nut.

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