An angle measuring instrument for a reach truck

Abstract

The utility model relates to a forklift instrument technical field discloses a kind of angle measuring instruments for telescopic arm forklift, including fixed installation in the scale dial of telescopic arm body, scale dial outer surface has angle scale mark;Scale dial is equipped with the anti-drop groove extending along the arc direction of scale dial;Pointer component, including the counterweight seat rotationally connected in arm body, counterweight seat is fixedly connected with pendulum needle one end, pendulum needle other end is swing end, swing end extends towards scale dial and swings in anti-drop groove;The swing end of pendulum needle is fixedly connected with pointer, the length direction of pointer is perpendicular to the swing plane of pendulum needle, pointer is located scale dial outer surface and points to the angle scale mark of scale dial, scale dial moves synchronously with arm body, pointer keeps directional under the action of gravity and swing relative to scale dial surface, to indicate arm body real-time inclination. The utility model can satisfy ground personnel and driver simultaneously observe telescopic arm body inclination, can prevent pointer from turning out simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of forklift instrument technology, specifically an angle measuring instrument for telescopic boom forklifts. Background Technology

[0002] A telescopic boom forklift is an engineering vehicle that uses a telescopic boom with a large amplitude to lift and move materials. The boom's tilt angle varies greatly (typically from -3° to +70°). To ensure operational safety and accuracy, the operator needs to obtain the boom tilt angle in real time and accurately.

[0003] Currently, most telescopic forklifts rely on a combination of instrument observation and visual confirmation to determine the boom's tilt angle. However, these instruments are typically located in the cab, making them inconvenient for ground personnel to observe. While some forklifts use angle indicators mounted on the mast for observation, these usually involve a pointer directly exposed on one side of the mast's uprights via a hinge point. This is particularly problematic for telescopic forklifts with narrow overall width and small booms, where the boom is close to the cab. The external pointer is easily obstructed by the cab's frame, hindering the driver's view. Furthermore, the external pointer is prone to tipping over when the vehicle travels on bumpy roads or swings excessively, resulting in low reliability.

[0004] Therefore, there is an urgent need for an angle measuring instrument for telescopic boom forklifts that allows both the driver in the cab and personnel on the ground to observe simultaneously, prevents the pointer from flipping out, and is highly reliable and compact in structure. Utility Model Content

[0005] The purpose of this utility model is to provide an angle measuring instrument for telescopic boom forklifts to solve the problems mentioned in the background art, so as to facilitate the driver in the cab and the ground personnel to observe the boom tilt angle at the same time, and to prevent the pointer from flipping out.

[0006] To achieve the above objectives, this utility model provides the following technical solution: An angle measuring instrument for telescopic boom forklifts, comprising: The dial, which has an arc-shaped structure, is fixedly installed on the telescopic arm body, and the outer surface of the dial has angle scale markings. An anti-detachment groove is formed on the dial, and the anti-detachment groove extends along the arc direction of the dial; Pointer components, including: The counterweight is rotatably connected to the arm body and maintains the pointing direction of the pointer assembly under the action of gravity. The pendulum needle has one end fixedly connected to the counterweight seat and the other end is a swing end, which extends toward the scale and swings within the anti-disengagement groove. A pointer is fixedly connected to the swing end of the pendulum, and its length direction is perpendicular to the swing plane of the pendulum. The pointer is located on the outer surface of the dial and points to the angle scale markings on the dial. The dial moves synchronously with the arm, and the pointer remains oriented under the action of gravity and swings relative to the dial to indicate the real-time tilt angle of the arm.

[0007] As a further embodiment of this utility model: in order to reduce the frictional resistance and viscous effect when the counterweight rotates, and to ensure that the pointer assembly can rotate flexibly and smoothly under the action of gravity to maintain the pointing direction, it also includes a stud fixed on the telescopic arm body and a smooth inner hole provided on the counterweight. The stud passes through the smooth inner hole, so that the counterweight is rotatably connected to the arm body around the stud.

[0008] As a further embodiment of this utility model: in order to facilitate the positioning, adjustment and replacement of the dial, and to avoid directly machining the mounting structure on the dial, the dial is fixed to the arm body by a mounting plate. The mounting plate is provided with mounting holes, and the mounting plate is fixed to the arm body by fasteners passing through the mounting holes.

[0009] As a further embodiment of this utility model: to allow the dial to be finely adjusted during installation, the mounting hole is an arc-shaped waist hole, the center of which coincides with the rotation center of the counterweight.

[0010] As a further embodiment of this utility model: to ensure that the distance between the pointer and the dial remains constant within the measuring range and to avoid reading errors caused by non-concentricity, the center of the arc of the dial coincides with the rotation center of the counterweight.

[0011] As a further aspect of this utility model: to ensure that the angle scale markings on the dial are not obscured by the cab frame from both inside and outside the cab, the width of the dial is greater than the gap width between the cab frame and the surface of the boom at the installation position.

[0012] As a further embodiment of this utility model: to facilitate the quick replacement of different specifications of labels according to different vehicle models and different range requirements to enhance versatility, a label is also included that is attached to the outer surface of the dial, and the label is printed with angle scale markings.

[0013] As a further aspect of this utility model: to facilitate intuitive reading and easy identification, the angle scale markings on the label are evenly distributed.

[0014] As a further aspect of this utility model: to ensure the accuracy of the angle measurement reference and facilitate zero-position calibration, when the arm is placed horizontally, the pointer points to the zero-position scale.

[0015] Compared with the prior art, the beneficial effects of this utility model are: This utility model features a novel structure. By embedding the pendulum needle connected to the pointer within the anti-dislodgement groove of the dial, the pointer swings on the dial surface, preventing external pointers from being easily damaged or flipping off the dial on bumpy roads. This improves the product's service life and reliability under harsh working conditions. The pointer assembly always points in a fixed direction based on gravity, and the moving dial provides a clear and real-time display of the boom tilt angle. The mechanical structure offers delay-free and interference-resistant display, unaffected by the vehicle's electrical system. The overall device has a compact structure, suitable for telescopic boom forklifts where the distance between the cab and the boom is close and installation space is limited, avoiding the problem of small-sized boom angle gauges being easily obscured by the cab frame. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a side view of the present invention; Figure 3 This is a rear view of the present invention; Figure 4 This is a top view of the present invention; Figure 5 This is a schematic diagram of the label of this utility model; Figure 6 This is a front view of the present invention installed on the telescopic boom body; Figure 7 This is a side view of the present invention installed on the telescopic boom body; Figure 8 This is a perspective view of the present invention installed on the telescopic boom body; In the diagram: 1-Dial, 11-Anti-detachment groove, 12-Mounting plate, 121-Mounting hole, 13-Label, 2-Pointer assembly, 21-Counterweight seat, 211-Smooth inner hole, 22-Swivel pin, 23-Pointer, 3-Stud. Detailed Implementation

[0017] 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.

[0018] In the description of this application, 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 this application. For ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations.

[0019] It should be noted that in the description of this application, the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" 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 application and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] Please see Figure 1-8 In this embodiment of the present invention, an angle measuring instrument for a telescopic forklift includes a dial 1 and a pointer assembly 2. The pointer assembly 2 includes a counterweight 21, a pendulum 22, and a pointer 23. Figure 1 and Figure 2 As shown, the counterweight 21 is rotatably connected to the surface of the telescopic arm. A threaded hole is formed on the surface of the telescopic arm, and a stud 3 is threaded into this hole. A smooth inner hole 211 is formed on the counterweight 21, and the stud 3 passes through this hole. A nut is threaded to the end of the stud 3 furthest from the arm, allowing the counterweight 21 to rotate around the stud 3. This ensures smooth rotation of the pointer assembly 2, guaranteeing that the pointer assembly 2 maintains its pointing direction under gravity during the telescopic arm's lifting and lowering process. The weight of the counterweight 21 needs to be continuously adjusted through simulation to ensure overall balance of the pointer assembly 2, thus ensuring that the pointer assembly 2 always points in a fixed direction under gravity. One end of the pendulum needle 22 is welded to the counterweight 21, and the other end is a swinging end that swings around the stud 3. A pointer 23 is welded to the swinging end of the pendulum needle 22, and the length of the pointer 23 is perpendicular to the swing plane of the pendulum needle 22.

[0021] like Figure 1 and Figure 7As shown, the dial 1 is mounted on the surface of the telescopic arm body, perpendicular to the surface of the telescopic arm body. The dial 1 is vertically welded to the mounting plate 12, which has mounting holes 121. Fasteners pass through the mounting holes 121 and are threaded onto the arm body, thus securing the mounting plate 12 to the telescopic arm. The dial 1 has an overall arc-shaped structure, with the center of the arc coinciding with the rotation center of the counterweight 21. This avoids interference between the dial 1 and the pointer assembly 2 when they swing relative to each other, and ensures a constant distance between the pointer 23 and the dial 1, preventing reading errors due to non-concentricity. In this embodiment, the fastener is specifically a bolt, and the mounting hole 121 is specifically an arc-shaped waist hole, with the center of its arc coinciding with the rotation center of the counterweight 21. Two mounting holes 121 are specifically provided to facilitate fine-tuning during the installation of the dial 1. Figure 8 As shown, the width of the dial 1 is greater than the gap between the cab frame and the surface of the boom at the installation position, to prevent the angle markings on the dial 1 from being obscured by the cab frame. The specific width of the dial 1 and the slot position of the anti-detachment groove 11 are designed based on the actual distance between the boom and the cab frame.

[0022] like Figure 1 and Figure 4 As shown, an anti-detachment groove 11 is provided in the middle of the dial 1. An angle scale mark is provided on the side surface of the dial 1 away from the telescopic arm body. The anti-detachment groove 11 extends along the arc direction of the dial 1, that is, the extension direction of the anti-detachment groove 11 is consistent with the swing trajectory of the pendulum needle 22. At the same time, the length of the pendulum needle 22 of the pointer assembly 2 is greater than the distance from the rotation center of the counterweight 21 to the surface of the dial 1, so that the pendulum needle 22 extends toward the dial 1 and can swing in the anti-detachment groove 11, thereby placing the pointer 23 at the swing end of the pendulum needle 22 on the outer surface of the dial 1 and pointing to the angle scale mark on the dial 1 to display the tilt angle of the telescopic arm body. The anti-detachment groove 11 is larger than the pointer 23 in both width and length, so that the pointer 23 will not come into contact with the anti-detachment groove 11 when it swings within the normal angle range, thus avoiding friction and wear. At the same time, the size of the anti-detachment groove 11 matches the range of the angle scale markings in the length direction, limiting the extreme stroke of the pointer 23. When the pointer 23 swings to the maximum angle, the end of the anti-detachment groove 11 will block the pointer 23 from continuing to move, thereby playing an anti-detachment role.

[0023] like Figure 4 and Figure 5As shown, a label 13 is affixed to the outer surface of the dial 1. The label 13 also has evenly distributed angle scale markings printed on it, used to cover the angle scale markings on the dial 1. This protects the surface of the dial 1 from corrosion and scratches, reducing maintenance costs and difficulty. Furthermore, since the installation positions of the pointer assembly 2 and the dial 1 may differ between different vehicle models, the angle scale markings on the label 13 are divided into different ranges based on the relative positional relationship between the dial 1 and the pointer assembly 2, allowing for quick replacement of different specifications and enhancing versatility. In this embodiment, the label 13 is specifically made of PVC, and the scale range of the angle markings is specifically set from 70° at the top of the label 13 to -10° at the bottom. The scale on the label 13 is marked in 5° units to cover the required working range of the telescopic forklift. When the telescopic arm is placed horizontally, pointer 23 points to the zero mark, and the dial 1 moves synchronously with the arm. When the telescopic arm is raised or lowered, the dial 1 rotates with it, while pointer 23 remains oriented under gravity and swings relative to the dial 1 to indicate the real-time tilt angle of the arm. In this embodiment, the length of pointer 23 is also configured to indicate the number on label 13, avoiding unclear tilt angle indication due to insufficient pointer length.

[0024] This utility model has a novel structure and stable operation. In use, the telescopic boom is first placed horizontally on the bracket. After the boom is installed, the stud 3 is threaded onto the boom. Then, the counterweight 21 of the pointer assembly 2 is inserted into the stud 3, so that the stud 3 passes through the smooth inner hole 211 of the counterweight 21. This ensures that the pointer assembly 2 can rotate smoothly around the stud 3 and that the pointer 23 maintains its pointing direction under gravity. Then, the mounting plate 12 and the dial 1 are securely connected to the telescopic boom by bolts through the mounting holes 121 on the mounting plate 12. This ensures that the driver in the cab and personnel on the ground can clearly see the label 13 on the dial 1 and observe whether the pointer 23 points to the zero mark on the label 13 on the dial 1. If not, the bolts on the mounting holes 121 are loosened and the position of the mounting plate 12 is adjusted to ensure that the pointer 23 points to the zero mark on the dial 1 when the boom is horizontal. Finally, the bolts on the mounting holes 121 are tightened to complete the installation. After installation, the driver operates the boom to raise and lower it. The dial 1 moves synchronously with the boom, and the pointer 23 always points in one direction under the action of gravity. Thus, it swings relative to the anti-disengagement groove 11 of the dial 1 and points to different scales of the label 13, thereby indicating the real-time tilt angle of the boom.

[0025] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0026] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. An angle measuring instrument for a telescopic boom forklift, characterized in that, include: The dial (1) has an arc-shaped structure and is fixedly installed on the telescopic arm body. The outer surface of the dial (1) has angle scale markings. An anti-detachment groove (11) is formed on the dial (1), and the anti-detachment groove (11) extends along the arc direction of the dial (1); Pointer component (2), including: The counterweight (21) is rotatably connected to the arm body and maintains the pointing direction of the pointer assembly (2) under the action of gravity. The pendulum needle (22) has one end fixedly connected to the counterweight (21) and the other end is a swing end. The swing end extends toward the dial (1) and swings in the anti-detachment groove (11). A pointer (23) is fixedly connected to the swing end of the pendulum (22), and its length direction is perpendicular to the swing plane of the pendulum (22). The pointer (23) is located on the outer surface of the dial (1) and points to the angle scale markings on the dial (1). The dial (1) moves synchronously with the arm body, and the pointer (23) remains oriented under the action of gravity and swings relative to the dial (1) to indicate the real-time tilt angle of the arm body.

2. The angle measuring instrument according to claim 1, characterized in that: It also includes a stud (3) fixed on the telescopic arm body and a smooth inner hole (211) provided on the counterweight seat (21). The stud (3) passes through the smooth inner hole (211) so that the counterweight seat (21) is rotatably connected to the arm body around the stud (3).

3. The angle measuring instrument according to claim 1, characterized in that: The dial (1) is fixed to the arm body by a mounting plate (12). The mounting plate (12) is provided with mounting holes (121). The mounting plate (12) is fixed to the arm body by fasteners passing through the mounting holes (121).

4. The angle measuring instrument according to claim 3, characterized in that: The mounting hole (121) is an arc-shaped waist hole, and the center of its arc coincides with the rotation center of the counterweight (21).

5. The angle measuring instrument according to claim 1, characterized in that: The center of the arc of the dial (1) coincides with the rotation center of the counterweight (21).

6. The angle measuring instrument according to claim 1, characterized in that: The width of the dial (1) is greater than the gap width between the cab frame and the boom surface at the installation position.

7. The angle measuring instrument according to claim 1, characterized in that: It also includes a label (13) attached to the outer surface of the dial (1), the label (13) having an angle scale marking printed on it.

8. The angle measuring instrument according to claim 7, characterized in that: The angle scale markings on the label (13) are evenly distributed.

9. The angle measuring instrument according to claim 1, characterized in that: When the arm is placed horizontally, the pointer (23) points to the zero mark.

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