A commercial vehicle seat rotation mechanism

Abstract

The invention discloses a commercial vehicle seat rotation mechanism, including an upper turntable, a ratchet, an intermediate turntable, a cross roller, a fixed seat, and a lower turntable; the upper turntable is connected to the lower turntable to form an inner ring of the rotation mechanism; the bottom of the intermediate turntable is connected to the fixed seat to form an outer ring of the rotation mechanism; the outer ring of the rotation mechanism is rotationally connected to the inner ring of the rotation mechanism through a cross roller; the upper turntable is provided with a middle hole, the wall of the middle hole is integrally extended downward with a turntable neck, and the middle turntable is sleeved on the turntable neck; the fixed seat is provided with a middle hole, and the middle hole is sleeved on the lower turntable; the ratchet is rotationally connected to the upper turntable, and a rotation reset mechanism is provided between the ratchet and the upper turntable; a plurality of groups of ratchets are distributed on the outer periphery of the intermediate turntable for locking with the ratchet. The invention can meet the installation space requirements of all commercial vehicle seats, and has a simple structure, small size, light weight, low cost, small rotation gap, small rotation torque, low noise, and meets the strength requirements of commercial vehicle seats.

Description

Technical Field

[0001] The invention belongs to the technical field of commercial vehicle seats and relates to a commercial vehicle seat rotation mechanism, which solves the problem that the commercial vehicle (heavy truck) seat installation space is small and conventional rotation mechanisms do not meet installation and use requirements. Background Art

[0002] With the rapid development of the automobile industry, car seats are one of the main components of automobile parts. For car seats, they must not only meet the needs of driving, but the safety, comfort and appearance of the seats have also become important factors in winning market competition.

[0003] When designing car seats, in order to accommodate different occupants and meet the comfort requirements of passengers of different body shapes and sizes, the angle of the seat back is generally adjustable. In order to further improve the adaptability of the seat, some seats have also added a rotation adjustment function. However, the current car seat rotation devices are all manual rotation adjustment, and the minimum adjustable angle is large, which is inconvenient to operate and has low adjustable accuracy, which is not conducive to occupant use.

[0004] In addition, commercial vehicles, such as heavy trucks, are different from passenger cars in that the installation space of commercial vehicles is small. The air suspension seats used in commercial vehicles have a small Z-direction space, which causes the H point of the seat to not meet the human-machine requirements, and the X-direction space is small, which does not meet the installation requirements; therefore, the conventional rotating mechanism does not meet the requirements of installation and use. Summary of the invention

[0005] In order to solve the problem in the prior art that the conventional rotating mechanism does not meet the installation requirements due to the small installation space of commercial vehicle seats, the present invention provides a commercial vehicle seat rotating mechanism, which can meet the installation space requirements of all commercial vehicle seats, and has a simple structure, small size, light weight, low cost, small rotation gap, small rotation torque, low noise, and can meet the strength requirements of commercial vehicle seats.

[0006] The purpose of the present invention is achieved through the following technical solutions, in conjunction with the accompanying drawings:

[0007] A commercial vehicle seat rotation mechanism comprises an upper turntable 1, a ratchet 2, an intermediate turntable 3, a cross roller 4, a fixed seat 5, and a lower turntable 6; the bottom surface of the upper turntable 1 is connected to the top surface of the lower turntable 6 by bolts to form an inner ring of the rotation mechanism; the bottom of the intermediate turntable 3 is connected to the fixed seat 5 by bolts to form an outer ring of the rotation mechanism; the outer ring of the rotation mechanism is rotationally connected to the inner ring of the rotation mechanism by the cross roller 4; the upper turntable 1 is provided with a middle hole, and the wall of the middle hole is integrally extended downward with a turntable neck, and the intermediate turntable 3 is hollowly sleeved on the turntable neck of the upper turntable 1; the fixed seat 5 is provided with a middle hole, and the middle hole is hollowly sleeved on the lower turntable 6; the ratchet 2 is rotationally connected to the upper turntable 1, and a rotation reset mechanism is provided between the ratchet 2 and the upper turntable 1; a plurality of groups of ratchet teeth 32 are distributed on the outer periphery of the intermediate turntable 3 for locking with the ratchet 2.

[0008] Furthermore, the upper turntable 1 includes an upper turntable body 11 and a pawl mounting plate 13, and the pawl mounting plate 13 is fixed to the upper turntable body 11 by bolts; the pawl mounting plate 13 includes a pawl mounting plate body 131, and the pawl mounting plate body 131 is provided with an accommodating hole for accommodating the pawl 2; the pawl mounting plate body 131 extends downward integrally with a pair of connecting ears 132, and the pawl 2 is rotatably connected to the connecting ears 132 through a rotating shaft 21; the rotation reset mechanism is installed between the pawl mounting plate body 131 and the pawl 2.

[0009] Furthermore, the rotation reset mechanism is an elastic piece 133 , the top of the elastic piece 133 is clamped on the pawl mounting plate body 131 , and the bottom is clamped on the back of the pawl 2 .

[0010] Furthermore, the rotation reset mechanism is a return spring, which is sleeved on the rotating shaft 21 of the pawl 2, and two ends of the return spring are respectively fixed on the pawl mounting plate body 131 and the rotating shaft 21.

[0011] Furthermore, the upper turntable body 11 is provided with a middle hole, the hole wall of the middle hole extends downwardly as a turntable neck, the end of the turntable neck is provided with a lower turntable connecting inner edge 12, and the upper turntable 1 is bolted to the top surface of the lower turntable 6 through the lower turntable connecting inner edge 12.

[0012] Furthermore, the outer wall of the transition section between the inner edge 12 of the lower turntable and the turntable neck is an inclined surface for matching the cross roller 4 .

[0013] Furthermore, the intermediate turntable 3 is an integrated structure, which includes a sleeve 33, a middle locking disk 31, and a fixed seat connecting outer edge 34; the sleeve 33 is hollowly sleeved on the outer periphery of the turntable neck of the upper turntable 1; the middle locking disk 31 is located on the outer periphery of the sleeve 33, and multiple groups of ratchet teeth 32 are evenly distributed on the outer periphery of the middle locking disk 31, and the intermediate turntable 3 is locked with the pawl 2 through the ratchet teeth 32; the fixed seat connecting outer edge 34 is located at the bottom of the sleeve 3, and the fixed seat connecting outer edge 34 is connected to the fixed seat 5 by bolts.

[0014] Furthermore, the inner wall of the transition section between the sleeve 33 and the outer edge 34 of the fixing seat is an inclined surface for matching the cross roller 4 .

[0015] Furthermore, the wall of the middle hole of the fixing seat 5 is provided with an inclined surface for matching the cross roller 4 ; the top end of the outer periphery of the lower turntable 6 is an inclined surface for matching the cross roller 4 .

[0016] Furthermore, the cross roller 4 is made of PA66 material, and the cross roller 4 includes a plurality of rollers, and the arrangement directions of the rollers are staggered.

[0017] The present invention has the following beneficial effects:

[0018] The present invention provides a commercial vehicle seat rotation mechanism, wherein the upper turntable and the fixed seat are connected as a whole to form the inner ring of the rotation mechanism; the lower turntable and the middle turntable are fixed to form the outer ring of the rotation mechanism; the outer ring and the inner ring are rotationally connected through cross rollers, and can withstand large loads in the axial and radial directions; the design is simple, the mechanism is small in size, and the weight is light; the ball retainer is made of PA material, which has high mechanical strength, good lubricity, and small rotation operation force. The ratchet is made of PA material, rotationally connected to the upper turntable, and cooperates with the teeth of the middle turntable to achieve relative rotation, locking and self-lubrication between the outer ring and the inner ring.

[0019] The present invention can meet the installation space requirements of all commercial vehicle seats, and has a simple structure, small size, light weight, low cost, small rotational clearance, small rotational torque, low noise, and can meet the strength requirements of commercial vehicle seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structural decomposition of a commercial vehicle seat rotation mechanism according to Embodiment 1 of the present invention;

[0021] Figure 2 This is a schematic diagram of a front cross-sectional structure of a commercial vehicle seat rotation mechanism according to Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the front view of a commercial vehicle seat rotation mechanism according to Embodiment 1 of the present invention;

[0023] Figure 4This is a schematic diagram of a top view of a commercial vehicle seat rotation mechanism according to Embodiment 1 of the present invention;

[0024] Figure 5 This is an axonometric diagram of a commercial vehicle seat rotation mechanism according to Embodiment 1 of the present invention;

[0025] Figure 6 This is a schematic diagram of the structure of the upper turntable in Example 1 of the present invention;

[0026] Figure 7 This is a schematic diagram of the assembly of the pawl mounting plate and the pawl in Example 1 of the present invention;

[0027] Figure 8 It is a schematic diagram of the assembly of the pawl, the middle rotating disk, the cross roller and the lower rotating disk described in Example 1 of the present invention;

[0028] Fig. 9 This is a schematic diagram of the connection between the intermediate rotating disk and the cross rollers described in Example 1 of the present invention;

[0029] Fig.10 This is a schematic diagram of the main structure of the intermediate turntable according to Embodiment 1 of the present invention;

[0030] Fig.11 This is a front view schematic diagram of the connection between the intermediate rotating disk and the cross rollers described in Example 1 of the present invention;

[0031] In the figure:

[0032] 1-upper turntable; 2-pawl; 3-middle turntable; 4-cross roller; 5-fixed seat; 6-lower turntable;

[0033] 11-upper turntable body; 12-lower turntable connecting inner edge; 13-pawl mounting plate; 131-pawl mounting plate body; 132-connecting ear; 133-elastic sheet;

[0034] 21- rotating shaft;

[0035] 31-middle locking plate; 32-ratchet; 33-sleeve; 34-fixed seat connected to the outer edge. DETAILED DESCRIPTION

[0036] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments:

[0037] Example 1

[0038] like Figures 1 to 5As shown, a commercial vehicle seat rotation mechanism comprises an upper turntable 1, a ratchet 2, an intermediate turntable 3, a cross roller 4, a fixed seat 5, and a lower turntable 6; the bottom surface of the upper turntable 1 and the top surface of the lower turntable 6 are connected by a plurality of bolts to form an inner ring of the rotation mechanism; the upper turntable 1 is provided with a middle hole, and the wall of the middle hole extends downward as a whole to form a turntable neck; the intermediate turntable 3 is hollowly sleeved on the outer periphery of the turntable neck of the upper turntable 1; the fixed seat 5 is provided with a middle hole, and the middle hole is hollowly sleeved on the outer periphery of the lower turntable 6; the bottom of the intermediate turntable 3 is connected to the fixed seat 5 by a plurality of bolts to form an outer ring of the rotation mechanism; the outer ring of the rotation mechanism is rotationally connected to the inner ring of the rotation mechanism by the cross roller 4; the ratchet 2 is rotationally connected to the upper turntable 1, and a rotation reset mechanism is provided between the ratchet 2 and the upper turntable 1; a plurality of groups of ratchets 32 are distributed on the outer periphery of the intermediate turntable 3 for locking with the ratchet 2.

[0039] like Figures 5 to 7 As shown, the upper turntable 1 includes an upper turntable body 11 and a pawl mounting plate 13, and the pawl mounting plate 13 is fixed to the upper turntable body 11 by bolts; the pawl mounting plate 13 includes a pawl mounting plate body 131, and the pawl mounting plate body 131 is provided with an accommodating hole for accommodating the pawl 2; the pawl mounting plate body 131 extends downwardly as a whole with a pair of connecting ears 132, and the pawl 2 is rotatably connected to the connecting ears 132 through a rotating shaft 21; the rotation reset mechanism is installed between the pawl mounting plate body 131 and the pawl 2.

[0040] like Figure 7 As shown, in this embodiment, the rotation reset mechanism is an elastic piece 132 , the top of the elastic piece 132 is clamped on the pawl mounting plate body 131 , and the bottom is clamped on the back of the pawl 2 .

[0041] The upper turntable body 11 is provided with a middle hole, the hole wall of the middle hole extends downward as a turntable neck, and the end of the turntable neck is provided with a lower turntable connecting inner edge 12. The upper turntable 1 is bolted to the top surface of the lower turntable 6 through the lower turntable connecting inner edge 12.

[0042] The outer wall of the transition section between the inner edge 12 of the lower turntable and the neck of the turntable is an inclined surface for matching the cross roller 4 .

[0043] like Figures 8 to 11 As shown, the intermediate turntable 3 is an integrated structure, which includes a sleeve 33, a middle locking disk 31, and a fixed seat connecting outer edge 34; the sleeve 33 is hollowly sleeved on the outer periphery of the turntable neck of the upper turntable 1; the middle locking disk 31 is located on the outer periphery of the sleeve 33, and multiple groups of ratchet teeth 32 are evenly distributed on the outer periphery of the middle locking disk 31, and the intermediate turntable 3 is locked with the pawl 2 through the ratchet teeth 32; the fixed seat connecting outer edge 34 is located at the bottom of the sleeve 3, and the fixed seat connecting outer edge 34 is connected to the fixed seat 5 by bolts.

[0044] The inner wall of the transition section between the sleeve 33 and the outer edge 34 of the fixing seat is an inclined surface for matching the cross roller 4 .

[0045] The wall of the middle hole of the fixing seat 5 is provided with an inclined surface for matching the cross roller 4 .

[0046] The top end of the outer periphery of the lower turntable 6 is an inclined surface for matching the cross roller 4 .

[0047] The cross roller 4 includes a plurality of rollers, and the arrangement directions of the rollers are staggered.

[0048] The cross roller 4 is made of PA66 material to increase lubricity and reduce operating force and noise.

[0049] The working principle of this embodiment is:

[0050] In the initial state, the pawl 2 is locked with the ratchet teeth 32 of the middle rotating disk, locking the relative position of the inner ring of the rotating mechanism and the outer ring of the rotating mechanism;

[0051] When the seat needs to be rotated, the pawl 2 is operated by a cable or a cylinder to rotate the pawl 2 downward and disengage the ratchet 32 ​​of the middle turntable, thereby unlocking the inner ring of the rotating mechanism and the outer ring of the rotating mechanism;

[0052] Then the upper turntable 1 is rotated, and under the action of the cross roller 4, the inner ring of the rotating mechanism (consisting of the upper turntable 1 and the lower turntable 6 fixedly) rotates relative to the outer ring of the rotating mechanism (consisting of the middle turntable 3 and the fixed seat 5 fixedly); during the rotation process, the pawl 2 moves with the upper turntable, and the middle locking plate 31 presses the pawl 2;

[0053] Until the pawl 2 rotates to the position corresponding to the next set of ratchet teeth 32 of the middle locking plate 31, at this time, under the action of the elastic sheet 133, the pawl 2 rotates upward and locks with the ratchet teeth 32, locking the relative position of the inner ring of the rotating mechanism and the outer ring of the rotating mechanism again.

[0054] Example 2

[0055] The difference between this embodiment and embodiment 1 is that in this embodiment, the rotation reset mechanism is a return spring, the return spring is sleeved on the rotating shaft 21 of the pawl 2, and the two ends of the return spring are respectively fixed on the pawl mounting plate body 131 and the rotating shaft 21.

[0056] The working principle of this embodiment is:

[0057] In the initial state, the pawl 2 is locked with the ratchet teeth 32 of the middle rotating disk, locking the relative position of the inner ring of the rotating mechanism and the outer ring of the rotating mechanism;

[0058] When the seat needs to be rotated, the pawl 2 is operated by a cable or a cylinder to rotate the pawl 2 downward and disengage the ratchet 32 ​​of the middle turntable, thereby unlocking the inner ring of the rotating mechanism and the outer ring of the rotating mechanism;

[0059] Then the upper rotating disk 1 is rotated, during which the pawl 2 moves with the upper rotating disk, and the middle locking disk 31 presses the pawl 2;

[0060] Until the pawl 2 rotates to the position corresponding to the next set of ratchet teeth 32 of the middle locking plate 31, the pawl 2 rotates upward and locks with the ratchet teeth 32 under the action of the return spring, locking the relative position of the inner ring of the rotating mechanism and the outer ring of the rotating mechanism again.

Claims

1. A commercial vehicle seat rotation mechanism, characterized in that: The invention comprises an upper rotating disk (1), a ratchet (2), an intermediate rotating disk (3), a cross roller (4), a fixed seat (5), and a lower rotating disk (6); the bottom surface of the upper rotating disk (1) and the top surface of the lower rotating disk (6) are connected by bolts to form an inner ring of the rotating mechanism; the bottom of the intermediate rotating disk (3) and the fixed seat (5) are connected by bolts to form an outer ring of the rotating mechanism; the outer ring of the rotating mechanism and the inner ring of the rotating mechanism are rotatably connected by cross rollers (4); the upper rotating disk (1) is provided with a middle hole, the wall of the middle hole is integrally extended downward with a rotating disk neck, and the intermediate rotating disk (3) is hollowly sleeved on the rotating disk neck of the upper rotating disk (1); the fixed seat (5) is provided with a middle hole, and the middle hole is hollowly sleeved on the lower rotating disk (6); the ratchet (2) is rotatably connected to the upper rotating disk (1), and a rotating reset mechanism is provided between the ratchet (2) and the upper rotating disk (1); a plurality of groups of ratchet teeth (32) are distributed on the outer periphery of the intermediate rotating disk (3) for locking with the ratchet (2); The upper turntable (1) comprises an upper turntable body (11) and a pawl mounting plate (13), wherein the pawl mounting plate (13) is fixed to the upper turntable body (11) by means of bolts; the pawl mounting plate (13) comprises a pawl mounting plate body (131), wherein the pawl mounting plate body (131) is provided with a receiving hole for receiving the pawl (2); the pawl mounting plate body (131) is integrally provided with a pair of connecting ears (132) extending downwardly, wherein the pawl (2) is rotatably connected to the connecting ears (132) via a rotating shaft (21); and the rotation reset mechanism is installed between the pawl mounting plate body (131) and the pawl (2); The intermediate rotating disk (3) is an integrated structure, comprising a sleeve (33), a middle locking disk (32), and a fixed seat connecting outer edge (34); the sleeve (33) is hollowly sleeved on the outer periphery of the rotating disk neck of the upper rotating disk (1); the middle locking disk (32) is located on the outer periphery of the sleeve (33), and a plurality of groups of ratchet teeth (32) are evenly distributed on the outer periphery of the middle locking disk (32), and the intermediate rotating disk (3) is locked by the ratchet teeth (32) and the pawl (2); the fixed seat connecting outer edge (34) is located at the bottom of the sleeve (33), and the fixed seat connecting outer edge (34) is connected to the fixed seat (5) by bolts.

2. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The rotational reset mechanism is an elastic sheet (133), the top of the elastic sheet (133) is clamped on the pawl mounting plate body (131), and the bottom is clamped on the back of the pawl (2).

3. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The rotation reset mechanism is a return spring, which is sleeved on the rotating shaft (21) of the pawl (2), and the two ends of the return spring are respectively fixed on the pawl mounting plate body (131) and the rotating shaft (21).

4. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The upper turntable body (11) is provided with a middle hole, the hole wall of the middle hole integrally extends downward to form a turntable neck, the end of the turntable neck is provided with a lower turntable connecting inner edge (12), and the upper turntable (1) is bolted to the top surface of the lower turntable (6) via the lower turntable connecting inner edge (12).

5. A commercial vehicle seat rotation mechanism as claimed in claim 4, characterized in that: The outer wall of the transition section between the inner edge (12) of the lower turntable and the turntable neck is an inclined surface for matching the cross roller (4).

6. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The inner wall of the transition section between the sleeve (33) and the outer edge (34) of the fixed seat is an inclined surface, which is used to match the cross roller (4).

7. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The wall of the middle hole of the fixing seat (5) is provided with an inclined surface for matching the cross roller (4); the top end of the outer periphery of the lower rotating disk (6) is an inclined surface for matching the cross roller (4).

8. A commercial vehicle seat rotation mechanism as claimed in claim 1, characterized in that: The cross roller (4) is made of PA66 material, and comprises a plurality of rollers, each roller being arranged in a staggered manner.

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