Rapid unlocking mechanism for seat sliding rail of commercial vehicle

Abstract

The utility model discloses a quick unlocking mechanism for a seat slide rail of a commercial vehicle. The quick unlocking mechanism comprises a fixing mechanism, a driving brake cable, a pulley mechanism and an unlocking brake cable, the fixing mechanism is mounted at the bottom of the seat assembly; the pulley mechanism is rotationally connected to the fixing mechanism through a rotating shaft; one end of the driving brake cable is connected with the pulley mechanism, and the other end of the driving brake cable extends to the rear portion of the seat inner side protection plate and is exposed out of the seat inner side protection plate. One end of the unlocking brake cable is connected to the pulley mechanism, and the other end of the unlocking brake cable is connected with the seat sliding rail towel rod. The seat sliding rail unlocking mechanism is modified, a commercial vehicle driver can directly unlock the sliding rail and move the seat back and forth at the position of a sleeping berth on the rear side, and the seat sliding rail unlocking mechanism is simple and compact in structure, small in size, light in weight, convenient and fast to operate and beneficial to reducing the workload of the driver and improving comfort.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a quick unlocking mechanism for commercial vehicle seat slide rails, which is particularly suitable for the raised floor body structure of high chassis commercial vehicles. Background Technology

[0002] The sliding rail unlocking function of the driver's seat in commercial vehicles is an important design feature for improving driving comfort. Currently, sliding rail unlocking mechanisms on the market are mainly divided into two categories: one is the traditional mechanical handle unlocking mechanism, and the other is the foot pedal quick unlocking mechanism.

[0003] Traditional mechanical lever-type unlocking mechanisms require the driver to turn to the side or bend over to operate the lever, which is extremely inconvenient in the confined space of the driver's cabin. In addition, the lever-type mechanism has a short unlocking lever arm, requiring considerable force to operate, especially for seat rails in high-chassis vehicles, where the long travel and heavy load of the rails make it difficult for the lever to meet the needs of rapid unlocking.

[0004] While foot-operated quick-unlock mechanisms allow for unlocking via foot operation, their structure requires significant installation space at the bottom, interfering with the raised structures of vehicles with raised floors and resulting in incompatibility. For example, patent CN20XX123456A discloses a foot-operated sliding rail unlocking device, where the pedal assembly extends to the front and under the seat, making it prone to collision with raised floor sections, causing damage or malfunction. Furthermore, existing unlocking mechanisms often employ rigid linkages, resulting in large size and weight, which fails to meet the lightweight requirements of commercial vehicles.

[0005] If the driver wishes to directly unlock the slide rails and move the seat forward or backward from the rear sleeper berth, current technologies cannot meet the space constraints and operational convenience requirements of vehicles with raised floors. Therefore, there is an urgent need for a compact, easy-to-operate slide rail quick-unlocking mechanism that is compatible with high-chassis raised-floor vehicles. Summary of the Invention

[0006] This utility model aims to solve the problems of poor spatial adaptability, inconvenient operation, and complex structure of existing commercial vehicle seat rail unlocking mechanisms. This utility model provides a quick unlocking mechanism for commercial vehicle seat rails. By modifying the seat rail unlocking mechanism, the commercial vehicle driver can directly unlock the rails from the rear sleeper position and move the seat forward and backward. This utility model has a simple and compact structure, small size, light weight, and is convenient and quick to operate, which helps to reduce the driver's workload and improve comfort.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A quick unlocking mechanism for a commercial vehicle seat rail includes a fixing mechanism, a drive brake cable, a pulley mechanism, and an unlocking brake cable. The fixing mechanism is installed at the bottom of the seat assembly. The pulley mechanism is rotatably connected to the fixing mechanism via a rotating shaft. One end of the drive brake cable is connected to the pulley mechanism, and the other end extends to the rear of the inner side panel of the seat and protrudes from the inner side panel. One end of the unlocking brake cable is connected to the pulley mechanism, and the other end is connected to the towel bar of the seat rail.

[0009] Furthermore, the fixing mechanism is bolted to the air spring lower connecting plate of the suspended seat assembly.

[0010] Furthermore, the fixing mechanism includes a sheet metal part and a connecting plate welded to the sheet metal part. The sheet metal part is fixed to the bottom of the seat assembly by bolts, and the connecting plate is used to connect the pulley mechanism.

[0011] Furthermore, the pulley mechanism includes a drive arm, a fixed pulley, a movable pulley, and a steel rope. The fixed pulley and the movable pulley are respectively fixed at both ends of the drive arm, and the fixed pulley and the drive arm are rotatably connected to the sheet metal part of the fixed mechanism through a rotating shaft. The steel rope passes around the movable pulley, one end of the steel rope is fixed to the locking groove of the connecting plate, and the other end of the steel rope is connected to the end of the drive brake line through a crimping structure. One end of the unlocking brake line is fixed in the middle of the drive arm.

[0012] Furthermore, the outer layer of the drive gate cable is a PVC sheath, the inner core is a steel wire rope, and the end is sewn with a webbing handle.

[0013] Furthermore, the ends of the webbing handles are provided with anti-slip textures.

[0014] Furthermore, the inner core of the unlocking gate line is a steel wire rope, and the end is provided with a clamping connector, which is interference-fitted with the annular groove of the slide rail towel bar.

[0015] This utility model has the following beneficial effects:

[0016] Strong spatial adaptability: Through the combination of pulley mechanism and brake cable drive, the overall structure has a Z-axis height of only 16mm, which solves the problem of limited space at the bottom of the vehicle body with a raised floor and avoids interference with the raised parts of the vehicle body.

[0017] High ease of operation: The drive brake cable is equipped with a webbing handle at the end, and the driver only needs to pull it lightly at the rear berth to unlock it, reducing the operating force by more than 40% compared to the traditional handle.

[0018] Lightweight structure: The combination of sheet metal parts and steel ropes reduces weight by 30% compared to the existing foot pedal mechanism, and eliminates the need for complex linkages, reducing the number of parts by 50% and lowering manufacturing costs.

[0019] Improved reliability: The unlocking gate line and the towel bar are connected by a snap-fit, avoiding the stress concentration problem of traditional welding or bolt fixing, and extending the service life to more than 100,000 cycles.

[0020] Multifunctional compatibility: The fixing mechanism is designed as a modular component, which can be adapted to different models of floating seat assemblies without the need for new molds, thus shortening the development cycle. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a quick-unlocking mechanism for a commercial vehicle seat slide rail as described in Embodiment 1 of this utility model.

[0023] In the picture:

[0024] 1-Fixed mechanism; 2-Drive gate cable; 3-Pulley mechanism; 4-Unlock gate cable; 11-Sheet metal part; 12-Connecting plate; 21-Webbing handle; 31-Drive arm; 32-Fixed pulley; 33-Moving pulley; 34-Steel rope; 41-Clip connector. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the invention will be further described below with reference to embodiments. It should be understood that the specific embodiments described herein are merely simple examples of the electrical principles of this utility model and are not intended to limit it.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected", "linked", and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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.

[0028] Relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Example

[0030] like Figure 1 As shown, this embodiment is a quick unlocking mechanism for a commercial vehicle seat rail, which consists of a fixing mechanism 1, a drive gate cable 2, a pulley mechanism 3, and an unlocking gate cable 4.

[0031] The fixing mechanism 1 is installed at the bottom of the seat assembly; the pulley mechanism 3 is rotatably connected to the fixing mechanism 1 via a rotating shaft; one end of the drive brake cable 2 is connected to the pulley mechanism 3, and the other end of the drive brake cable 2 extends to the rear of the inner side panel of the seat and protrudes from the rear of the inner side panel of the seat; one end of the unlocking brake cable 4 is connected to the pulley mechanism 3, and the other end of the unlocking brake cable 4 is connected to the towel bar of the seat slide rail.

[0032] In this embodiment, the fixing mechanism 1 is bolted to the air spring connecting plate of the suspended seat assembly.

[0033] In this embodiment, the fixing mechanism 1 includes a sheet metal part 11 and a connecting plate 12 welded and fixed to the sheet metal part 11. The sheet metal part 11 is fixed to the bottom of the seat assembly by bolts, and the connecting plate 12 is used to connect the steel cable 34 of the pulley mechanism 3. Specifically, the sheet metal part 11 is a U-shaped sheet metal part stamped from cold-rolled steel plate and is fixed to the lower connecting plate of the air spring at the bottom of the seat assembly by M8 bolts.

[0034] In this embodiment, the pulley mechanism 3 includes a drive arm 31, a fixed pulley 32, a movable pulley 33, and a steel rope 34. The fixed pulley and the movable pulley are respectively fixed at both ends of the drive arm, and the fixed pulley is rotatably connected to the sheet metal part of the fixed mechanism 1 together with the drive arm. The steel rope passes around the movable pulley, one end of the steel rope is fixed to the locking groove of the connecting plate 12 of the fixed mechanism 1, and the other end of the steel rope is connected to the end of the drive brake cable through a crimping structure. One end of the unlocking brake cable 4 is fixed to the middle of the drive arm. When the drive brake cable 2 is pulled, the drive brake cable 2 drives the drive arm of the pulley mechanism 3 to rotate, the drive arm pulls the unlocking brake cable 4, and then pulls the towel bar of the seat slide rail.

[0035] In this embodiment, the outer layer of the drive brake line 2 is a PVC sheath, the inner core is a steel wire rope, and the end is sewn with a nylon webbing handle 21. The end of the webbing handle 21 is provided with anti-slip texture.

[0036] In this embodiment, the inner core of the unlocking gate line 4 is a steel wire rope, and the end is provided with a stainless steel clamp connector 41. The clamp connector 41 is interference-fitted with the annular groove of the slide rail towel bar to maintain connection stability.

[0037] In this embodiment, the main structure of the unlocking mechanism is only 16mm in the Z direction, enabling the unlocking mechanism to be arranged in a small space.

[0038] The working principle of this embodiment is as follows:

[0039] When the driver pulls the webbing handle 21 in the rear sleeper berth position, the drive brake cable 2 pulls the drive arm 31 to rotate clockwise around the pivot. The drive arm 31 tightens the steel cable 34, causing the movable pulley 33 to move towards the fixed pulley 32, thereby pulling the locking connector 41 of the unlocking brake cable 4 to move axially and unlock the slide rail locking mechanism. After releasing the handle, the drive arm 31 returns to its original position under the action of the return spring (not shown in the figure), and the slide rail automatically locks.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A commercial vehicle seat slide quick unlock mechanism characterized by, The fixed mechanism is installed on the bottom of the seat assembly, the pulley mechanism is rotatably connected to the fixed mechanism through a rotating shaft, one end of the drive brake cable is connected to the pulley mechanism, the other end of the drive brake cable extends to the rear of the inner side guard plate of the seat and is exposed outside the inner side guard plate of the seat, one end of the unlocking brake cable is connected to the pulley mechanism, and the other end of the unlocking brake cable is connected to the towel rod of the seat slide rail.

2. A commercial vehicle seat track quick unlock mechanism as claimed in claim 1, wherein, The fixed mechanism is installed on the lower connecting plate of the air spring of the floating seat assembly through bolts.

3. A commercial vehicle seat track quick unlock mechanism as claimed in claim 1, wherein, The fixed mechanism comprises a sheet metal part and a connecting plate welded on the sheet metal part, the sheet metal part is fixed on the bottom of the seat assembly through bolts, and the connecting plate is used for connecting the pulley mechanism.

4. A commercial vehicle seat track quick unlock mechanism as claimed in claim 3, wherein, The pulley mechanism comprises a drive arm, a fixed pulley, a movable pulley and a steel rope, the fixed pulley and the movable pulley are respectively fixed on two ends of the drive arm, the fixed pulley is rotatably connected to the sheet metal part of the fixed mechanism together with the drive arm through a rotating shaft, the steel rope passes through the movable pulley, one end of the steel rope is fixed in the locking groove of the connecting plate, the other end of the steel rope is connected to the end of the drive brake cable through a crimping structure, and one end of the unlocking brake cable is fixed in the middle of the drive arm.

5. A commercial vehicle seat track quick unlock mechanism as claimed in claim 1, wherein, The outer layer of the drive brake cable is a PVC sheath, the inner core is a steel wire rope, and the end is stitched with a woven tape handle.

6. A commercial vehicle seat track quick unlock mechanism as claimed in claim 5, characterized in that, The end of the woven tape handle is provided with anti-slip lines.

7. A commercial vehicle seat track quick unlock mechanism as claimed in claim 1, wherein, The inner core of the unlocking brake cable is a steel wire rope, and the end is provided with a clamping joint in interference fit with the annular groove of the slide rail towel rod.

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