A telescopic rail

Abstract

A telescopic guide rail relates to the crane guide rail technical field, including the fixed arm and movable arm of hollow structure, both plug-in cooperation and realize axial telescopic through telescopic drive arrangement, fixed track is established in fixed arm top, and turnover track is installed in movable arm through turnover device, can be from side overturn to top, with fixed track coaxial, form continuous smooth operation path. Turnover device adopts four connecting rod mechanism, compact structure, butt joint precision is provided two telescopic rod installation mode to adapt to different working conditions. The movable arm top is equipped with support block and prevents the track to sag, and the mounting seat realizes vertical floating compensation assembly error through the guide device. Multiple turnover devices are arranged along the movable arm, and the overall stiffness and load uniformity are improved. The utility model gives consideration to light weight, high strength and operation stability, effectively solves the problem that the traditional lateral guide rail cannot bear the trolley.

Description

Technical Field

[0001] This utility model relates to the field of crane guide rail technology, and in particular to a telescopic guide rail. Background Technology

[0002] In current industrial applications, especially involving mobile cranes or similar equipment, guide rail systems are a key component, crucial for ensuring the stability and efficiency of equipment operation. However, traditional lateral extension guide rail designs have several limitations. First, these designs typically cannot directly support the movement of the crane trolley, necessitating additional measures to ensure the trolley's safe passage during lateral operation extensions, increasing system complexity and cost. Second, traditional guide rails often exhibit steps or misalignment during connection, affecting not only the continuity of the track profile but also posing a challenge to the smoothness of trolley operation, potentially leading to vibration and noise issues during operation, and even safety accidents.

[0003] Furthermore, given the coexistence of lightweight and high-strength requirements, designing a guide rail system that can reduce overall weight while providing sufficient structural strength has become a pressing issue. Most existing guide rail solutions fail to effectively balance these two aspects, either prioritizing strength at the expense of weight control or sacrificing necessary structural strength in pursuit of lightweight design, making them unsuitable for the growing demands of modern vehicle-mounted equipment. Simultaneously, with changing operating environments, the requirement for adjustable guide rail length is increasing. Traditional fixed-length guide rails struggle to adapt to diverse working scenarios, limiting the flexibility and applicability of the equipment.

[0004] Furthermore, existing designs for tilting devices also have shortcomings. Some tilting devices are complex in structure and bulky, and their movement trajectory is difficult to control, making them prone to inaccurate positioning. This not only affects the precise docking between the tilting track and the fixed track but may also lead to equipment failure due to structural interference. In addition, the lack of effective support and guidance mechanisms makes the tilted track prone to deformation or displacement under load, further affecting the stability and reliability of the entire system.

[0005] In summary, given the shortcomings of existing technologies, such as functional limitations, structural discontinuities, difficulty in balancing lightweight and high strength, and insufficient precision and stability of the flipping mechanism, the development of a novel telescopic guide rail system is particularly necessary. This system, through innovative design, aims to overcome the various drawbacks of traditional guide rail systems, providing users with a more efficient, safe, and flexible solution. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses a telescopic guide rail.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] A telescopic guide rail includes:

[0009] The fixed arm has a hollow structure.

[0010] Fixed rail, installed on top of fixed arm;

[0011] The movable arm, which is also a hollow structure, is movably connected to the fixed arm.

[0012] A flipping device is installed inside the movable arm, and the flipping part of the flipping device extends out of the movable arm. Both the movable arm and the fixed arm are provided with clearance slots at the positions corresponding to the flipping part.

[0013] A flip track is installed on the flipping part of the flipping device; the flipping device drives the flip track to flip from one side of the movable arm to the top of the movable arm, so that the flip track is coaxial with the fixed track and the track surfaces are at the same height.

[0014] The telescopic drive device is installed between the fixed arm and the movable arm; it is used to drive the telescopic movement of the movable arm.

[0015] Preferably, the flipping device includes:

[0016] Mounting base, installed inside the movable arm;

[0017] The tilting frame has a C-shaped structure, and the bottom corners of the tilting frame are hinged to the mounting base;

[0018] The telescopic rod is installed between the tilting frame and the mounting base; it is used to drive the tilting frame to tilt.

[0019] The connecting rod is fastened at one end to the tilting frame and at the other end to the fixed track, serving as the tilting part of the tilting device.

[0020] Preferably, one end of the telescopic rod is hinged to the top corner of the tilting frame, and the other end is hinged to the mounting base; or the telescopic rod is fixedly connected to the mounting base, and a connecting rod is provided between the telescopic end of the telescopic rod and the tilting frame, with one end of the connecting rod hinged to the tilting frame and the other end correspondingly hinged to the telescopic end of the telescopic rod.

[0021] Preferably, a support block for supporting the flipping track is installed at the top of the movable arm.

[0022] Preferably, the mounting base is vertically and floatingly connected to the movable arm via a guide device.

[0023] Preferably, the flipping device comprises multiple units spaced apart along the length of the movable arm.

[0024] Preferably, a limit baffle is installed at the extended end of the movable arm.

[0025] Preferably, a slider is installed between the fixed arm and the movable arm, and the movable arm is slidably extended and retracted to the fixed arm via the slider.

[0026] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0027] (1) This utility model designs both the fixed arm and the movable arm as hollow structures, which effectively reduces the weight of the system while ensuring the overall structural strength, thus meeting the dual requirements of vehicle-mounted equipment for lightweighting and load-bearing capacity. The fixed rail and the tilting rail set on the movable arm have the same cross-sectional shape, ensuring that the rail profile is continuous and stepless after the two are connected, which significantly improves the stability of the crane trolley operation. The movable arm and the fixed arm are connected by a plug-in joint and axial sliding is achieved through a telescopic drive device, which can flexibly adjust the guide rail length according to the working space, enhancing the adaptability of the equipment.

[0028] (2) The flipping device of this utility model is integrated inside the movable arm. By making room for slots, it provides sufficient space for telescopic and flipping movements, avoiding structural interference. Driven by the flipping device, the flipping track can be flipped from the side position to the top and is coaxial and at the same height as the fixed track, forming a complete and continuous running path. This solves the problem that traditional side-extending guide rails cannot directly support the trolley's operation, taking into account both lateral operation expansion and running stability. The flipping device adopts a four-bar linkage mechanism, which is compact in structure and has a clear movement trajectory. It works with the connecting rod to transmit motion and maintain the track posture, ensuring stable flipping process and high docking accuracy. The two telescopic rod installation methods are suitable for different working conditions: the direct hinge structure has a fast response and precise control; the indirect drive structure with connecting rods optimizes the force distribution and improves durability and running stability.

[0029] (3) After the flipping track is in place, the support block provides rigid support to it, effectively preventing the track from deflecting due to its own weight or dynamic load, and ensuring that the top surface of the track is strictly level with the fixed track. The mounting seat achieves slight vertical floating through the guide device composed of guide posts and guide sleeves, which can automatically compensate for the docking gap caused by manufacturing errors, assembly deviations or thermal deformation, ensuring that the flipping track is accurately positioned and in close contact, thereby improving docking quality and service life.

[0030] (4) In this utility model, multiple flipping devices are arranged at intervals along the length of the movable arm to achieve multi-point synchronous flipping, which significantly improves the overall rigidity and load distribution uniformity of the flipping track and avoids twisting or misalignment caused by single-point drive. The limiting baffle is set at the end of the movable arm, and its structure matches the track profile. It can provide reliable blocking when the trolley runs to the end to prevent derailment accidents. The slider is embedded in the guide groove to guide the movable arm to extend and retract smoothly, while bearing lateral force and reducing frictional resistance. This not only improves the smoothness of the extension and retraction action and the repeatability of the positioning, but also extends the service life of the entire guide rail system. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a schematic diagram of the structure of this utility model;

[0033] Figure 3 This is a schematic diagram of the first installation structure for a telescopic pole.

[0034] Figure 4 This is a schematic diagram of the second installation structure for the telescopic pole.

[0035] In the diagram: 1. Fixed arm; 2. Fixed track; 3. Movable arm; 4. Tilting track; 5. Telescopic drive device; 6. Support block; 7. Tilting device; 7-1. Mounting base; 7-2. Tilting frame; 7-3. Telescopic rod; 7-4. Connecting rod; 7-5. Guide device; 7. Clamping block; 8. Connecting rod; 9. Limiting baffle; 10. Slider. Detailed Implementation

[0036] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify 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.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] Example 1:

[0040] Combined with appendix Figures 1-4 A telescopic guide rail includes a fixed arm 1, a fixed rail 2, a movable arm 3, and a tilting device 7. The fixed arm 1 is a hollow structure installed inside the vehicle compartment, reducing overall weight while providing sufficient structural strength to meet the dual requirements of lightweight design and load-bearing capacity for onboard equipment. The fixed rail 2 is installed at the top of the fixed arm 1, serving as the basic guide rail for the crane trolley's movement within the vehicle compartment. Its cross-sectional shape matches the rail on the movable arm 3, ensuring a continuous, stepless rail profile during docking, thus guaranteeing smooth trolley operation. The movable arm 3 also adopts a hollow structure, with its internal cavity dimensions matching the outer contour of the fixed arm 1. The two are connected via a movable plug-in connection, allowing axial sliding under telescopic drive to extend or retract the guide rail length, adapting to spatial requirements under different operating conditions.

[0041] The tilting device 7 is installed inside the movable arm 3, and the tilting part of the tilting device 7 extends outside the movable arm 3. To avoid structural interference, clearance slots are provided at the corresponding tilting parts of both the movable arm 3 and the fixed arm 1. These slots not only provide a channel for the extension and retraction of the movable arm 3 but also provide the necessary movement space for the tilting device 7 to perform its tilting action. A tilting rail 4 is installed on the tilting part of the tilting device 7. The tilting device 7 drives the tilting rail 4 to tilt from one side of the movable arm 3 to the top of the movable arm 3, so that the tilting rail 4 and the fixed rail 2 are on the same straight line and the top surfaces of the rails are at the same height, thus forming a continuous and smooth complete rail for the crane trolley to pass smoothly. This design effectively solves the functional limitation problem caused by the inability of traditional lateral extension guide rails to directly support the operation of the crane trolley, enabling the equipment to achieve lateral operation expansion while ensuring the stability and safety of the trolley during operation.

[0042] A telescopic drive device 5 is installed between the fixed arm 1 and the movable arm 3. The telescopic drive device 5 is used to drive the movable arm 3 to complete the telescopic action. It usually uses a hydraulic cylinder or electric push rod as a power source. It has the characteristics of large thrust, high control precision and fast response speed. It can ensure that the movable arm 3 runs smoothly and is accurately positioned during the extension or retraction process. At the same time, it has good impact resistance and environmental adaptability.

[0043] Specifically, the flipping device 7 includes a mounting base 7-1, a flipping frame 7-2, and a telescopic rod 7-3. The mounting base 7-1 is fixedly installed inside the movable arm 3, serving as the support base and rotation fulcrum for the entire flipping mechanism. The flipping frame 7-2 has a C-shaped structure, with its bottom corners hinged to the mounting base 7-1 via pins, forming the rotation center for the flipping motion. The telescopic rod 7-3 is installed between the flipping frame 7-2 and the mounting base 7-1, together forming a four-bar linkage flipping mechanism to drive the flipping frame 7-2 to complete the flipping action. Through the telescopic movement of the telescopic rod 7-3, the flipping frame 7-2 can be rotated around the hinge point, thereby realizing the flipping of the track 4 from a side-mounted state to a top-mounted state. This structure has a compact layout, a clear movement trajectory, and can reliably complete the precise docking of the track. The flipping frame 7-2 is connected to the connecting rod 7-4 by fasteners. The other end of the connecting rod 7-4 is fastened to the flipping track 4. The connecting rod 7-4 is the flipping part of the flipping device 7. During the flipping process, it plays the role of transmitting motion and maintaining the track posture, ensuring that the flipping track 4 remains stable throughout the entire flipping stroke and improving docking accuracy.

[0044] There are two installation methods for the telescopic rod 7-3: First, one end of the telescopic rod 7-3 is hinged to the top corner of the tilting frame 7-2, and the other end is hinged to the mounting base 7-1. This arrangement allows the telescopic rod 7-3 to directly participate in the driving process of the tilting frame 7-2, resulting in a simple structure, short transmission path, improved response speed and control accuracy of the tilting action, and reduced number of intermediate connecting parts, thus lowering the failure rate. Second, the telescopic rod 7-3 is fixedly connected to the mounting base 7-1, and a connecting rod 8 is provided between the telescopic end of the telescopic rod 7-3 and the tilting frame 7-2. One end of the connecting rod 8 is hinged to the tilting frame 7-2, and the other end is correspondingly hinged to the telescopic end of the telescopic rod 7-3. This structure, by introducing the connecting rod 8 to form an indirect driving mechanism, optimizes the force transmission direction during the tilting process, reduces local stress concentration at the hinge point, and improves the overall durability and operational stability of the mechanism, making it particularly suitable for working conditions requiring a large tilting angle or heavy load.

[0045] Example 2:

[0046] Combined with appendix Figures 1-4A telescopic guide rail, based on Embodiment 1, has a support block 6 installed on the top of the movable arm 3 to support the tilting track 4. When the tilting track 4 completes its tilt and reaches the top position, the support block 6 provides rigid support to its bottom, preventing the track's center from deflecting due to its own weight or dynamic loads generated during crane trolley operation. This ensures that the top surface of the tilting track 4 is strictly level with the fixed track 2, maintaining the overall smoothness of the track and ensuring the crane trolley runs smoothly and without impact when passing through the docking area. The mounting base 7-1 is vertically and floatingly connected to the movable arm 3 via a guide device 7-5. The guide device 7-5 typically consists of a guide post and a guide sleeve, allowing the mounting base 7-1 to float slightly in the vertical direction. This floating connection structure effectively compensates for any gaps that may occur between the tilting track 4 and the top of the movable arm 3 after tilting, caused by manufacturing tolerances, assembly deviations, or thermal deformation due to temperature changes during use. This ensures accurate positioning and tight contact of the tilting track 4, avoiding localized suspension or uneven stress that could affect the track docking quality and service life.

[0047] Example 3:

[0048] Combined with appendix Figures 1-4 A telescopic guide rail, based on any of the embodiments in Examples 1 and 2, wherein the flipping device 7 is a plurality of devices spaced apart along the length of the movable arm 3, typically two or more sets, located at the front end, rear end, and middle region of the movable arm 3 respectively. By synchronously driving the flipping rail 4 through multiple sets of flipping devices 7, the overall rigidity and load distribution uniformity of the flipping rail 4 can be significantly improved, avoiding rail twisting, misalignment, or local deformation caused by single-point driving, further improving the accuracy and reliability of rail docking, and enhancing the operational safety of the system under heavy load conditions. A limit baffle 9 is installed at the extended end of the movable arm 3, fixed to the outer side of the end of the movable arm 3. Its height and structural form match the rail profile, providing physical obstruction when the crane trolley reaches the end of the guide rail, effectively preventing the trolley from accidentally derailing due to operational errors or control system malfunctions, thus improving the safety of equipment use. Furthermore, a slider 10 is installed between the fixed arm 1 and the movable arm 3, enabling the movable arm 3 to achieve a sliding telescopic connection with the fixed arm 1 via the slider 10. The slider 10 is usually made of wear-resistant material and is embedded in the guide groove of the inner wall of the fixed arm 1 or the outer wall of the movable arm 3. Its function is to guide the movable arm 3 to slide smoothly along the axial direction of the fixed arm 1, while bearing lateral loads, reducing frictional resistance, improving the smoothness of telescopic movement and repeatability of positioning accuracy, and extending the service life of the guide rail system.

[0049] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. A telescopic guide rail, characterized in that, include: Fixed arm (1), which is a hollow structure; Fixed track (2) is installed on top of fixed arm (1); The movable arm (3) is also a hollow structure and is movably connected to the fixed arm (1); The flipping device (7) is installed inside the movable arm (3), and the flipping part of the flipping device (7) extends out of the movable arm (3). The movable arm (3) and the fixed arm (1) are provided with clearance slots at the positions corresponding to the flipping part. The flipping track (4) is installed on the flipping part of the flipping device (7); the flipping track (4) is driven by the flipping device (7) to flip from one side of the movable arm (3) to the top of the movable arm (3) so that the flipping track (4) is coaxial with the fixed track (2) and the track surfaces are at the same height; The telescopic drive device (5) is installed between the fixed arm (1) and the movable arm (3); it is used to drive the movable arm (3) to telescopic.

2. The telescopic guide rail as described in claim 1, characterized in that, The flipping device (7) includes: Mounting base (7-1) is installed inside the movable arm (3); The tilting frame (7-2) has a C-shaped structure, and the bottom corner of the tilting frame (7-2) is hinged to the mounting base (7-1); The telescopic rod (7-3) is installed between the tilting frame (7-2) and the mounting base (7-1); it is used to drive the tilting frame (7-2) to tilt. The connecting rod (7-4) is fastened at one end to the flipping frame (7-2) and at the other end to the fixed track (2), serving as the flipping part of the flipping device (7).

3. The telescopic guide rail as described in claim 2, characterized in that: One end of the telescopic rod (7-3) is hinged to the top corner of the flipping frame (7-2), and the other end is hinged to the mounting base (7-1); or the telescopic rod (7-3) is fixedly connected to the mounting base (7-1), and a connecting rod (8) is provided between the telescopic end of the telescopic rod (7-3) and the flipping frame (7-2), one end of the connecting rod (8) is hinged to the flipping frame (7-2), and the other end is correspondingly hinged to the telescopic end of the telescopic rod (7-3).

4. The telescopic guide rail as described in claim 1, characterized in that: The top of the movable arm (3) is equipped with a support block (6) for supporting the flipping track (4).

5. The telescopic guide rail as described in claim 2, characterized in that: The mounting base (7-1) is vertically and floatingly connected to the movable arm (3) via a guide device (7-5).

6. The telescopic guide rail as described in any one of claims 1 to 4, characterized in that: The flipping device (7) consists of multiple units spaced apart along the length of the movable arm (3).

7. The telescopic guide rail as described in claim 1, characterized in that: Limiting baffles (9) are installed at the extended end of the movable arm (3).

8. The telescopic guide rail as described in claim 1, characterized in that: A slider (10) is installed between the fixed arm (1) and the movable arm (3), and the movable arm (3) is slidably extended and retracted to the fixed arm (1) through the slider (10).

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