Rapid unlocking mechanism for seat sliding rail of commercial vehicle

Abstract

The invention 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. By refitting the seat slide rail unlocking mechanism, a commercial vehicle driver can directly unlock the slide rail and move the seat back and forth at the position of a sleeping berth on the rear side, and the seat slide 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] The invention belongs to the technical field of automobile accessories, and in particular relates to a quick unlocking mechanism for a seat slide rail of a commercial vehicle, and is particularly suitable for a convex floor body structure of a high-chassis commercial vehicle. Background Art

[0002] The slide rail unlocking function of the commercial vehicle driver's seat is an important design to improve driving comfort. Currently, the slide 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-operated quick unlocking mechanism.

[0003] For the traditional mechanical handle unlocking mechanism, the unlocking operation requires the driver to turn sideways or bend over to operate the handle, which is extremely inconvenient in the narrow cockpit. In addition, the unlocking lever arm of the handle mechanism is short, and a large force is required when operating it. Especially for the seat slide rails of high-chassis vehicles, due to the long travel and heavy load of the slide rails, the handle cannot meet the needs of quick unlocking.

[0004] Although the foot-operated quick unlocking mechanism can be unlocked by foot operation, its structure requires a large bottom installation space, and there is interference with the raised structure of the convex floor vehicle body, resulting in incompatibility. For example, patent CN20XX123456A discloses a foot-operated slide rail unlocking device, whose pedal assembly needs to extend to the front and bottom of the seat, which is easy to collide with the raised part of the floor on the convex floor vehicle body, causing damage to the mechanism or functional failure. In addition, the unlocking mechanism in the prior art mostly adopts a rigid connecting rod transmission, which is large in size and heavy in weight, and it is difficult to meet the lightweight requirements of commercial vehicles.

[0005] If the driver wants to directly unlock the slide rail and move the seat forward and backward in the rear berth position, the existing technologies cannot meet the space limitations and operational convenience requirements of the raised floor vehicle body. Therefore, there is an urgent need for a slide rail quick unlocking mechanism that is compact in structure, easy to operate, and suitable for high-chassis raised floor vehicles. Summary of the invention

[0006] The present invention aims to solve the problems of poor spatial adaptability, inconvenient operation and complex structure in the prior art of the commercial vehicle seat slide rail unlocking mechanism. The present invention provides a commercial vehicle seat slide rail quick unlocking mechanism. By modifying the seat slide rail unlocking mechanism, the commercial vehicle driver can directly unlock the slide rail in the rear berth position and move the seat forward and backward. The present invention has a simple and compact structure, a small size, a light weight, and is easy and quick to operate, which is beneficial to reducing the driver's workload and improving comfort.

[0007] The objective of the present invention is achieved through the following technical solutions:

[0008] A quick unlocking mechanism for a commercial vehicle seat slide rail, comprising a fixing mechanism, a driving brake line, a pulley mechanism and an unlocking brake line; the fixing mechanism is mounted at the bottom of a seat assembly; the pulley mechanism is rotatably connected to the fixing mechanism via a rotating shaft; one end of the driving brake line is connected to the pulley mechanism, and the other end of the driving brake line extends to the rear of an inner guard plate of the seat and is exposed from the inner guard plate of the seat; one end of the unlocking brake line is connected to the pulley mechanism, and the other end of the unlocking brake line is connected to a towel rod of the seat slide rail.

[0009] Furthermore, the fixing mechanism is mounted on a lower connecting plate of an air spring of a suspension seat assembly by means of bolts.

[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 driving 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 driving arm, and the fixed pulley and the driving arm are rotatably connected to the sheet metal of the fixing 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 driving gate wire through a crimping structure; one end of the unlocking gate wire is fixed to the middle of the driving arm.

[0012] Furthermore, the outer layer of the driving brake wire is a PVC sheath, the inner core is a steel wire rope, and a webbing handle is sewn on the end.

[0013] Furthermore, anti-slip grooves are provided at the end of the ribbon handle.

[0014] Furthermore, the inner core of the unlocking wire is a steel wire rope, and a clamping joint is provided at the end thereof, and the clamping joint is interference-fitted with the annular groove of the towel rod of the slide rail.

[0015] The present invention has the following beneficial effects:

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

[0017] Highly convenient to operate: A webbing handle is set at the end of the driving brake line. The driver only needs to pull it lightly at the rear berth position to unlock it. The operating force is reduced by more than 40% compared with the traditional handle.

[0018] Lightweight structure: It uses a combination of sheet metal and steel ropes, which is 30% lighter than the existing foot-operated mechanism, does not require complex connecting rods, reduces the number of parts by 50%, and reduces manufacturing costs.

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

[0020] Versatile compatibility: The fixing mechanism is designed as a modular component that can be adapted to different types of suspended seat assemblies without the need for re-molding, thus shortening the development cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a quick unlocking mechanism for a commercial vehicle seat slide rail as described in Example 1 of the present invention.

[0023] In the figure:

[0024] 1-fixing mechanism; 2-driving brake wire; 3-pulley mechanism; 4-unlocking brake wire; 11-sheet metal; 12-connecting plate; 21-ribbon handle; 31-driving arm; 32-fixed pulley; 33-moving pulley; 34-steel rope; 41-card connector. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in conjunction with an embodiment below. It should be understood that the specific embodiment described here is only a simple example of the electrical principle of the present invention and is not intended to be limiting.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of this embodiment, terms such as "up", "down", "left", and "right" and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] Relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also other elements not explicitly listed, or also includes 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 slide rail, which is composed of a fixing mechanism 1, a driving brake wire 2, a pulley mechanism 3 and an unlocking brake wire 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 through a rotating shaft; one end of the driving brake line 2 is connected to the pulley mechanism 3, and the other end of the driving brake line 2 extends to the rear of the inner guard plate of the seat and is exposed from the rear of the inner guard plate of the seat; one end of the unlocking brake line 4 is connected to the pulley mechanism 3, and the other end of the unlocking brake line 4 is connected to the towel rod of the seat slide rail.

[0032] In this embodiment, the fixing mechanism 1 is mounted on the lower connecting plate of the air spring of the suspension seat assembly by means of bolts.

[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 rope 34 of the pulley mechanism 3. Specifically, the sheet metal part 11 is a U-shaped sheet metal part stamped from a 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 driving 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 driving arm, and the fixed pulley and the driving arm are connected to the sheet metal part of the fixing mechanism 1 by rotation; 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 fixing mechanism 1, and the other end of the steel rope is connected to the end of the driving gate line through a crimping structure; one end of the unlocking gate line 4 is fixed to the middle of the driving arm, and when the driving gate line 2 is pulled, the driving gate line 2 drives the driving arm of the pulley mechanism 3 to rotate, and the driving arm pulls the unlocking gate line 4, thereby pulling the towel rod of the seat slide rail.

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

[0036] In this embodiment, the inner core of the unlocking wire 4 is a steel wire rope, and a stainless steel clamping joint 41 is provided at the end. The clamping joint 41 is interference fit with the annular groove of the towel rod of the slide rail to maintain the connection stability.

[0037] The main structure of the unlocking mechanism of this embodiment is only 16 mm in the Z direction, so that the unlocking mechanism can be arranged in a small space.

[0038] The working principle of this embodiment is:

[0039] When the driver pulls the webbing handle 21 at the rear berth position, the driving brake wire 2 pulls the driving arm 31 to rotate clockwise around the rotating shaft, and the driving arm 31 drives the steel rope 34 to tighten, so that the movable pulley 33 moves toward the fixed pulley 32, thereby pulling the clamping joint 41 of the unlocking brake wire 4 to move axially, unlocking the slide rail locking mechanism. After releasing the handle, the driving arm 31 returns to its original position under the action of the return spring (not shown in the figure), and the slide rail is automatically locked.

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

Claims

1. A commercial vehicle seat rail quick unlocking mechanism, characterized in that: It includes a fixing mechanism, a driving brake line, a pulley mechanism and an unlocking brake line; the fixing mechanism is installed at the bottom of the seat assembly; the pulley mechanism is rotatably connected to the fixing mechanism through a rotating shaft; one end of the driving brake line is connected to the pulley mechanism, and the other end of the driving brake line extends to the rear of the inner guard plate of the seat and is exposed from the inner guard plate of the seat; one end of the unlocking brake line is connected to the pulley mechanism, and the other end of the unlocking brake line is connected to the towel rod of the seat slide rail.

2. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 1, characterized in that: The fixing mechanism is installed on the lower connecting plate of the air spring of the suspension seat assembly through bolts.

3. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 1, characterized in that: The fixing mechanism includes a sheet metal part and a connecting plate welded on 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.

4. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 3, characterized in that: The pulley mechanism includes a driving arm, a fixed pulley, a movable pulley and a steel rope. The fixed pulley and the movable pulley are respectively fixed at two ends of the driving arm, and the fixed pulley and the driving arm are rotatably connected to the sheet metal of the fixing 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 driving gate wire through a crimping structure; one end of the unlocking gate wire is fixed to the middle of the driving arm.

5. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 1, characterized in that: The outer layer of the driving brake wire is a PVC sheath, the inner core is a steel wire rope, and the end is sewn with a ribbon handle.

6. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 5, characterized in that: The end of the webbing handle is equipped with anti-slip grooves.

7. A commercial vehicle seat rail quick unlocking mechanism as claimed in claim 1, characterized in that: The inner core of the unlocking brake wire is a steel wire rope, and a clamping joint is provided at the end thereof, and the clamping joint is interference-fitted with the annular groove of the towel rod of the slide rail.

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