Seat supports and seats

Abstract

The present application discloses a seat support, which includes a mounting plate, a rotating shaft and a fixed shaft; the mounting plate is arranged on the rotating shaft, and the mounting plate is used to mount the seat; a swing arm is arranged between the rotating shaft and the fixed shaft, and the two ends of the swing arm are rotatably connected to the rotating shaft and the fixed shaft respectively; a transmission mechanism is also arranged between the rotating shaft and the fixed shaft, and the transmission mechanism cooperates with the swing arm so that the rotating shaft can rotate circumferentially with the fixed shaft as the central axis. The present application also discloses a seat using the seat support, and the seat includes a seat and the above-mentioned seat support. The present invention provides a seat support and a seat, after the seat in the cab is installed on the seat support, the seat can adjust the position and angle by rotation, and the adjustable range is large, and the space utilization rate of the cab is improved, thereby increasing the activity space of the staff in the cab.

Description

Technical Field

[0001] The utility model belongs to the field of engineering vehicles, and in particular relates to a seat support and a seat. Background Art

[0002] At present, the cab of traditional engineering vehicles is usually set on the right side of the driving direction. When driving, the workers need to drive with their eyes on the road conditions in front of the driving direction. When working, the workers need to operate with their eyes on the actual working conditions of the construction target. Among them, the cab seat of large engineering vehicles is far away from the construction operation table, and usually two seats are installed. The two seats are used for driving and construction respectively, which affects the space utilization of the cab. In addition, when the workers need to stand for construction operations, they cannot move and remove the seats.

[0003] In actual situations, when the driving direction is opposite to the direction of the construction target, the cab seats of some engineering vehicles have rotation and sliding adjustment functions to meet the driving and construction needs of the staff. On the one hand, by providing a rotating axis, the seat can be rotated in the cab, and the seat can be adjusted 360 degrees around the rotating axis. On the other hand, by providing a slide rail, the seat can be adjusted back and forth with the slide rail as the sliding path.

[0004] In the prior art, there is a cab seat with a rotation adjustment function, such as CN215669820U, a rotation device for a bulldozer cab seat, comprising a bulldozer cab, a seat being arranged in the bulldozer cab, a seat rotation device being arranged under the seat, the seat rotation device comprising a slide rail, a slide plate matching the slide rail being arranged above the slide rail, a lifting rod being arranged above the slide plate, a lifting plate being connected above the lifting rod, a support frame being connected above the lifting plate, a rotating support plate being connected above the support frame, a rotating shaft being arranged inside the rotating support plate, a rotating motor being connected outside the rotating shaft, a seat being connected above the rotating shaft to realize the rotation of the seat, a seat back and a seat armrest box being arranged on the seat, a dust detection sensor being arranged outside the seat armrest box, a dust suction device being arranged inside the seat armrest box, and a dust suction port being arranged outside the seat armrest box.

[0005] In the above scheme, a seat rotation device is provided, which can rotate and adjust the seat and move it forward and backward, but it still has certain defects. This scheme cannot meet the actual use needs of large engineering vehicles. In the cab of traditional large engineering vehicles, on the one hand, the distance between the seat and the construction operating table is relatively far. Due to the limitation of the slide rail space, the distance that the seat can be adjusted forward and backward is limited, usually not exceeding two-thirds of the length of the seat itself, which cannot meet the use needs; on the other hand, the overall structure of the seat rotation device is relatively complex, and the required installation space is large, which leads to low space utilization in the cab and squeezes the activity space of the staff. Utility Model Content

[0006] The purpose of the utility model is to provide a seat support and a seat. After the seat in the cab is installed on the seat support, the seat can be adjusted in position and angle by rotation, and the adjustable range is large, and the space utilization rate of the cab is improved, thereby increasing the activity space of the staff in the cab.

[0007] According to one aspect of the present disclosure, a seat support is provided, which includes a mounting plate, a rotating shaft and a fixed shaft; the mounting plate is arranged on the rotating shaft, and the mounting plate is used to mount the seat; a swing arm is provided between the rotating shaft and the fixed shaft, and the two ends of the swing arm are respectively rotatably connected to the rotating shaft and the fixed shaft; a transmission mechanism is also provided between the rotating shaft and the fixed shaft, and the transmission mechanism cooperates with the swing arm so that the rotating shaft can rotate circumferentially with the fixed shaft as the center axis.

[0008] In some embodiments, the transmission mechanism is a synchronous belt mechanism; a small synchronous pulley is provided on the rotating shaft; a large synchronous pulley is provided on the fixed shaft; a synchronous toothed belt is provided between the rotating shaft and the fixed shaft; the small synchronous pulley is connected to the large synchronous pulley for transmission via the synchronous toothed belt.

[0009] In some embodiments, a first connecting tube and a second connecting tube are respectively provided at both ends of the swing arm; the first connecting tube is sleeved and rotatably connected to a rotating shaft; the second connecting tube is sleeved and rotatably connected to a fixed shaft.

[0010] In some embodiments, a positioning locking mechanism is provided on the mounting plate; the positioning locking mechanism includes a toggle rod, an adjuster and a brake ring; the toggle rod is connected to the brake ring through the adjuster; the brake ring is sleeved on the rotating shaft; the toggle rod locks or unlocks the rotating shaft through the adjuster to cause the brake ring to lock or unlock the rotating shaft.

[0011] In some embodiments, the mounting plate is further provided with two support tubes symmetrically arranged at intervals; after the seat is installed on the mounting plate, the two support tubes are located between the seat and the mounting plate, and the two support tubes are used to bear and support the seat.

[0012] In some embodiments, the rotating shaft is connected to the small synchronous pulley by a pin and rotates synchronously; the fixed shaft is connected to the large synchronous pulley by a pin.

[0013] In some embodiments, a tensioner is provided between the small synchronous belt pulley and the large synchronous belt pulley; the tensioner is used to adjust the tightness of the synchronous toothed belt.

[0014] In some embodiments, two bearings are disposed between the rotating shaft and the first connecting cylinder and are spaced apart in parallel; and two bearings are disposed between the fixed shaft and the second connecting cylinder and are spaced apart in parallel.

[0015] In some embodiments, a first accommodating cavity is provided between the rotating shaft and the first connecting cylinder; two first annular grooves are provided on the inner wall side of the first connecting cylinder, and the two first annular grooves are respectively located at the two ends of the first connecting cylinder; the two bearings are installed in the first accommodating cavity, the inner rings of the two bearings are fitted with the rotating shaft, and the outer rings of the two bearings are fitted with the first annular grooves.

[0016] In some embodiments, a shoulder is provided on the rotating shaft; the shoulder is located between the mounting plate and the first connecting cylinder; support washers are provided at both ends of the first accommodating cavity; wherein one support washer is located between the shoulder and the inner ring of the bearing close to the mounting plate end; and the other support washer is located between the inner ring of the bearing close to the small synchronous pulley end and the small synchronous pulley.

[0017] In some embodiments, a second accommodating cavity is provided between the fixed shaft and the second connecting cylinder; two second annular grooves are provided on the inner side wall of the second connecting cylinder, and the two second annular grooves are respectively located at the two ends of the second connecting cylinder; the two bearings are installed in the second accommodating cavity, the inner rings of the two bearings are fitted with the fixed shaft, and the outer rings of the two bearings are fitted with the second annular grooves.

[0018] In some embodiments, an end cover is provided on the fixed shaft; the end cover is located at one end of the fixed shaft close to the mounting plate; a support washer is provided between the second accommodating cavity and the large synchronous pulley; wherein the end cover is fitted with the inner ring of the bearing close to the end of the mounting plate, and the end cover is used to limit the bearing in the second accommodating cavity; the support washer is located between the inner ring of the bearing close to the end of the large synchronous pulley and the large synchronous pulley.

[0019] According to another aspect of the present disclosure, a seat is further provided, comprising the above-mentioned seat support.

[0020] According to the technical solution of the present invention, the seat support structure is a folding swing arm type. When the seat rotates, the mounting plate drives the rotating shaft to rotate, and the rotation of the rotating shaft drives the small synchronous pulley to rotate. The small synchronous pulley rotates and drives the rotating shaft to rotate circumferentially around the fixed axis through the synchronous toothed belt, thereby driving the seat to move along the circumferential rotation path of the rotating shaft. The rotation adjustment radius of the seat is relatively long and the front and rear adjustment range is relatively large. On the one hand, the swing arm of the seat support can be unfolded or folded according to actual needs. When the seat support is in a folded state, it occupies less space in the cab. On the other hand, compared with the slide rail solution, the seat support scheme occupies a smaller floor area of ​​the cab, and when the seat support is in an unfolded state, it can also achieve a larger front and rear adjustment distance range. Furthermore, when the driving position of the engineering vehicle is far away from the construction platform, the seat rotation adjustment of the seat support is used to adapt to driving or construction activities. There is no need to install two seats in the cab, which increases the movable space for staff in the cab and reduces the procurement cost of cab equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present disclosure. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 A first perspective perspective view of the seat support and the seat of the present application;

[0023] Figure 2 This is a schematic diagram of the structure of the seat support of this application;

[0024] Figure 3 It is an enlarged view of point A of the structural schematic diagram of the seat support of the present application;

[0025] Figure 4 It is an enlarged view of point B of the structural schematic diagram of the seat support of the present application;

[0026] Figure 5 It is a cross-sectional view of the structural schematic diagram of the seat support of the present application along the CC direction;

[0027] Figure 6 A second perspective view of the seat support and the seat of the present application;

[0028] In the figure: 1. seat; 2. mounting plate; 21. support plate; 22. support tube; 3. rotating shaft; 30. first locking pin; 31. small synchronous pulley; 32. shaft shoulder; 4. fixed shaft; 40. second locking pin; 41. large synchronous pulley; 42. fixed seat; 5. synchronous toothed belt; 51. tensioner; 52. tensioner shaft; 53. tensioner rod; 6. swing arm; 61. first connecting tube; 611. first annular groove; 62. second connecting tube; 621. second annular groove; 7. positioning locking mechanism; 71. toggle rod; 72. adjuster; 73. brake ring; 8. bearing; 81. first accommodating chamber; 82. second accommodating chamber; 9. support washer; 10. end cover; 11. first bolt; 12. second bolt; 13. third bolt. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, but are not exhaustive or limit the present invention to the disclosed form. Many modifications and changes are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

[0030] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] See also Figure 1 , shown is a first-perspective stereoscopic image of a seat support and a seat of the present application. The present application provides a seat support, which includes a mounting plate 2, a rotating shaft 3 and a fixed shaft 4.

[0032] Regarding the mounting plate 2, the mounting plate 2 is arranged on the rotating shaft 3, and the mounting plate 2 is located above the rotating shaft 3; the mounting plate 2 is used to mount the seat 1; when the mounting plate 2 rotates, the mounting plate 2 can drive the rotating shaft 3 to rotate synchronously; a threaded hole is provided on the seat 1, and a bolt through hole is provided on the mounting plate 2, and a first bolt 11 is marked in the figure. The first bolt 11 passes through the bolt through hole of the mounting plate 2 and is connected with the threaded hole on the seat 1. The first bolt 11 is used to bolt the seat 1 to the mounting plate 2.

[0033] Preferably, in this embodiment, the mounting plate 2 is fixedly connected to the rotating shaft 3. Furthermore, the mounting plate 2 is welded to the rotating shaft 3, so that the mounting plate 2 and the rotating shaft 3 have better connection stability.

[0034] Preferably, in this embodiment, a support plate 21 is further provided on the mounting plate 2, and the support plate 21 is located between the mounting plate 2 and the first connecting tube 61, and the two ends of the support plate 21 are respectively connected to the mounting plate 2 and the rotating shaft 3; the side view structure of the support plate 21 is L-shaped, and the two ends of the support plate 21 are respectively a main body and a tilted part, and a through hole for passing the rotating shaft 3 is opened on the main body, and the rotating shaft 3 is fixedly connected to the mounting plate 2 through the through hole of the main body of the support plate 21, and the tilted part is fixedly connected to the mounting plate 2, thereby increasing the connection stability between the mounting plate 2 and the rotating shaft 3.

[0035] In some embodiments, the support plate 21 is connected to the mounting plate 2 by welding.

[0036] Preferably, in this embodiment, the mounting plate 2 is further provided with two support tubes 22 which are symmetrically arranged at intervals. The support tubes 22 are hollow square tubes. Bolt through holes are provided on the support tubes 22. After the first bolt 11 passes through the bolt through hole of the mounting plate 2, it is connected to the threaded hole on the seat 1 through the bolt through hole on the support tube 22. After the seat 1 is installed on the mounting plate 2, the two support tubes 22 are located between the seat 1 and the mounting plate 2. The two support tubes 22 are used to bear and support the seat 1. The advantage of this solution is that the two support tubes 22 can prevent the relative surfaces of the seat 1 and the mounting plate 2 from contacting and wearing each other.

[0037] Regarding the rotating shaft 3, a small synchronous pulley 31 and a first connecting cylinder 61 are provided on the rotating shaft 3. The first connecting cylinder 61 is rotatably connected to the rotating shaft 3. The small synchronous pulley 31 is located below the first connecting cylinder 61. The first connecting cylinder 61 is located between the mounting plate 2 and the small synchronous pulley 31. When the rotating shaft 3 rotates, the rotating shaft 3 can drive the small synchronous pulley 31 to rotate. When the rotating shaft 3 rotates, the first connecting cylinder 61 can rotate relatively with the rotating shaft 3 as the center. The rotation axis of the small synchronous pulley 31 is the same as the rotation axis of the rotating shaft 3, and the rotation axis of the first connecting cylinder 61 is the same as the rotation axis of the rotating shaft 3.

[0038] Regarding the fixed shaft 4, a large synchronous pulley 41 and a second connecting tube 62 are provided on the fixed shaft 4. The second connecting tube 62 is rotatably connected to the rotating shaft 3. The large synchronous pulley 41 is located below the second connecting tube 62. The second connecting tube 62 is located between the mounting plate 2 and the large synchronous pulley 41.

[0039] Regarding the first connecting tube 61 and the second connecting tube 62, the first connecting tube 61 is a cylindrical structure that penetrates from top to bottom. Specifically, its top and bottom are open, and the rotating shaft 3 can penetrate up and down through the space therein; the second connecting tube 62 has the same structure as the first connecting tube 61, and the fixed shaft 4 can penetrate up and down through the space therein.

[0040] Regarding the synchronous toothed belt 5 , a synchronous toothed belt 5 is provided between the rotating shaft 3 and the fixed shaft 4 , the size of the large synchronous pulley 41 is larger than the size of the small synchronous pulley 31 , the small synchronous pulley 31 meshes with the synchronous toothed belt 5 , and the large synchronous pulley 41 meshes with the synchronous toothed belt 5 .

[0041] Regarding the swing arm 6 , the swing arm 6 is provided between the rotating shaft 3 and the fixed shaft 4 , and two ends of the swing arm 6 are respectively connected to the first connecting tube 61 and the second connecting tube 62 , and the first connecting tube 61 is fixedly connected to the second connecting tube 62 through the swing arm 6 .

[0042] In some embodiments, the swing arm 6 is connected to the connecting tube by welding.

[0043] The movement process of the rotating shaft 3 and the fixed shaft 4: the rotating shaft 3 rotates axially about its own axis and drives the small synchronous pulley 31 to rotate axially. By driving the rotating shaft 3 to rotate, the small synchronous pulley 31 can rotate circumferentially around the large synchronous pulley 41, and the first connecting cylinder 61 can rotate circumferentially around the second connecting cylinder 62, thereby enabling the rotating shaft 3 to rotate circumferentially around the fixed shaft 4.

[0044] Regarding the tensioner 51 , a tensioner 51 is provided between the small synchronous pulley 31 and the large synchronous pulley 41 . The tensioner 51 is connected to the swing arm 6 . The tensioner 51 is used to adjust the tightness of the synchronous toothed belt 5 to prevent the synchronous toothed belt 5 from loosening or falling off.

[0045] A positioning and locking mechanism 7 is provided on the mounting plate 2, and the positioning and locking mechanism 7 includes a toggle rod 71, an adjuster 72 and a brake ring 73, wherein the adjuster 72 is located between the toggle rod 71 and the brake ring 73; the toggle rod 71 is connected to the brake ring 73 through the adjuster 72, and the brake ring 73 is sleeved on the rotating shaft 3, and the toggle rod 71 locks or unlocks the brake ring 73 through the adjuster 72. Specifically, the user controls the adjuster 72 by adjusting the toggle rod 71, and further, the adjuster 72 can adjust the tightness of the brake ring 73 clamping the first connecting tube 61 to lock or unlock the rotating shaft 3.

[0046] Regarding the working method of the positioning locking mechanism: when the brake ring 73 locks the first connecting cylinder 61, the rotating shaft 3 and the first connecting cylinder 61 are relatively fixed, and the seat cannot be rotated and adjusted forward and backward; when the brake ring 73 unlocks the first connecting cylinder 61, the rotating shaft 3 and the first connecting cylinder 61 can rotate relative to each other, so that the seat can be rotated and adjusted forward and backward.

[0047] Preferably, in this embodiment, the positioning and locking mechanism 7 is disposed on the support plate 21 .

[0048] In some embodiments, the positioning locking mechanism is connected to the support plate 21 by welding.

[0049] Working state of the seat support: when the engineering vehicle is in the driving state, the seat 1 is adjusted to the driving platform, and the seat 1 and the swing arm 6 are in a folded state relative to each other; when the engineering vehicle is in the construction state, the seat 1 is adjusted to the operating platform, and the seat 1 and the swing arm 6 are in an unfolded state relative to each other; when it is necessary to switch the seat position to adapt to the working state, the rotating shaft 3 is unlocked by the positioning locking mechanism, and after the seat 1 is rotated and moved to the predetermined position, the rotating shaft 3 is locked by the positioning locking mechanism, the seat cannot be rotated and adjusted forward and backward, and the seat has better supporting rigidity.

[0050] According to the above scheme, the advantage of the seat support of the present application is that there is no need to install two seats in the cab to meet the needs of driving or construction operations. On the one hand, when the seats are in a folded state, the movable space for the staff in the cab can be increased. On the other hand, the number of seats in the cab is reduced, which can reduce the procurement cost of the cab equipment.

[0051] See also Figures 2 to 4 , shown are respectively a structural schematic diagram of the seat support of the present application, an enlarged diagram of point A of the structural schematic diagram of the seat support, and an enlarged diagram of point B of the structural schematic diagram of the seat support. A fixed seat 42 is provided on the fixed shaft 4, and the fixed seat 42 is a metal sheet. The cross-section of the fixed seat 42 is circular. The fixed seat 42 is located at the end of the fixed shaft 4 away from the mounting plate 2, and the fixed shaft 4 is installed in the cab through the fixed seat 42; a bolt through hole is provided on the fixed seat 42, and a threaded hole is provided on the floor of the cab. A second bolt 12 is marked in the figure, and the second bolt 12 passes through the bolt through hole of the fixed seat 42 and is connected with the threaded hole on the floor of the cab. The second bolt 12 is used to connect the fixed seat 42 to the floor of the cab.

[0052] Two bearings 8 are arranged in parallel and spaced apart between the rotating shaft 3 and the first connecting cylinder 61, a first accommodating cavity 81 is provided between the rotating shaft 3 and the first connecting cylinder 61, two first annular grooves 611 are provided on the inner wall side of the first connecting cylinder 61, the two first annular grooves 611 are respectively located at the two ends of the first connecting cylinder 61, the two bearings 8 are both installed in the first accommodating cavity 81, the inner rings of the two bearings 8 are both in contact with the rotating shaft 3, and the outer rings of the two bearings 8 are both in contact with the first annular grooves 611.

[0053] The two bearings 8 between the above-mentioned rotating shaft 3 and the first connecting cylinder 61 are respectively arranged at the two ends of the first connecting cylinder 61, and the two bearings 8 can be divided into a high-position bearing 8 and a low-position bearing 8 according to their positions. The two first annular grooves 611 on the inner wall side of the above-mentioned first connecting cylinder 61 can be divided into a high-position first annular groove 611 and a low-position first annular groove 611 according to their positions; the upper end surface of the high-position bearing 8 is not higher than or flush with the upper end surface of the first accommodating cavity 81, and the lower end surface of the high-position bearing 8 is in contact with the lower end surface of the high-position first annular groove 611; the lower end surface of the low-position bearing 8 is not lower than or flush with the lower end surface of the first accommodating cavity 81, and the upper end surface of the low-position bearing 8 is in contact with the upper end surface of the low-position first annular groove 611.

[0054] A shoulder 32 is provided on the rotating shaft 3. The shoulder 32 is arranged on the rotating shaft 3 in a circular ring shape. The shoulder 32 is located between the mounting plate 2 and the first connecting tube 61. Support washers 9 are provided at both ends of the first accommodating cavity 81. A support washer 9 is located between the shoulder 32 and the inner ring of the bearing 8 near the end of the mounting plate 2. The inner side wall of the support washer 9 fits the rotating shaft 3, and the diameter of the contour line of the outer side wall of the support washer 9 is smaller than the diameter of the inner contour line of the outer ring of the high-position bearing 8 on the rotating shaft 3. The support washer 9 can disperse the pressure between the shoulder 32 and the inner ring of the bearing 8 near the end of the mounting plate 2, and absorb the pressure from the shoulder 32 and the inner ring of the bearing 8 near the mounting plate 2. The vibration and impact of the inner ring of the bearing 8 at the end of the plate 2 is used to reduce noise and vibration. Another supporting washer 9 is located between the inner ring of the bearing 8 near the end of the small synchronous pulley 31 and the small synchronous pulley 31. The inner wall of the supporting washer 9 is in contact with the rotating shaft 3, and the diameter of the contour line of the outer wall of the supporting washer 9 is smaller than the diameter of the inner contour line of the outer ring of the low-position bearing 8 on the rotating shaft 3. The supporting washer 9 can disperse the pressure between the inner ring of the bearing 8 near the end of the small synchronous pulley 31 and the small synchronous pulley 31, and absorb the vibration and impact from the inner ring of the bearing 8 near the end of the small synchronous pulley 31 and the small synchronous pulley 31 to reduce noise and vibration.

[0055] Two bearings 8 are arranged in parallel and spaced apart between the fixed shaft 4 and the second connecting cylinder 62. A second accommodating cavity 82 is also provided between the fixed shaft 4 and the second connecting cylinder 62. Two second annular grooves 621 are provided on the inner side wall of the second connecting cylinder 62. The two second annular grooves 621 are respectively located at the two ends of the second connecting cylinder 62; the two bearings 8 are both installed in the second accommodating cavity 82, the inner rings of the two bearings 8 are both in contact with the fixed shaft 4, and the outer rings of the two bearings 8 are both in contact with the second annular grooves 621.

[0056] The two bearings 8 between the above-mentioned fixed shaft 4 and the second connecting cylinder 62 are respectively arranged at the two ends of the second connecting cylinder 62, and the two bearings 8 can be divided into a high-position bearing 8 and a low-position bearing 8 according to their positions. The two second annular grooves 621 on the inner wall side of the above-mentioned second connecting cylinder 62 can be divided into a high-position second annular groove 621 and a low-position second annular groove 621 according to their positions; the upper end surface of the high-position bearing 8 is not higher than or flush with the upper end surface of the second accommodating cavity 82, and the lower end surface of the high-position bearing 8 is in contact with the lower end surface of the high-position second annular groove 621; the lower end surface of the low-position bearing 8 is not lower than or flush with the lower end surface of the second accommodating cavity 82, and the upper end surface of the low-position bearing 8 is in contact with the upper end surface of the low-position second annular groove 621.

[0057] An end cover 10 is provided on the fixed shaft 4. The end cover 10 is located at one end of the fixed shaft 4 close to the mounting plate 2. The outer contour of the end cover 10 is circular. A bolt through hole is provided in the middle of the end cover 10. The diameter of the outer contour of the end cover 10 is smaller than the contour line of the inner side wall of the outer ring of the bearing 8 close to the mounting plate 2 on the fixed shaft 4. The end cover 10 fits with the inner ring of the bearing 8 close to the mounting plate 2. The end cover 10 is used to limit the bearing 8 in the second accommodating cavity 82. A support washer 9 is provided between the second accommodating cavity 82 and the large synchronous pulley 41. The support washer 9 is located Between the inner ring of the bearing 8 near the end of the large synchronous pulley 41 and the large synchronous pulley 41, the inner wall of the support washer 9 is fitted with the fixed shaft 4, and the diameter of the contour line of the outer wall of the support washer 9 is smaller than the diameter of the inner contour line of the outer ring of the low-position bearing 8 on the fixed shaft 4. The support washer 9 can disperse the pressure between the inner ring of the bearing 8 near the end of the large synchronous pulley 41 and the large synchronous pulley 41, and absorb the vibration and impact from the inner ring of the bearing 8 near the end of the large synchronous pulley 41 and the large synchronous pulley 41 to reduce noise and vibration.

[0058] Preferably, in this embodiment, a bolt through hole is provided in the middle of the end cover 10, and a threaded hole is provided at the upper end of the fixed shaft 4. A third bolt 13 is marked in the figure. The third bolt 13 passes through the bolt through hole of the end cover 10 and is connected to the threaded hole on the fixed shaft 4. The third bolt 13 is used to connect the end cover 10 to the fixed shaft 4.

[0059] See also Figure 5, which is a cross-sectional view of the structure schematic diagram of the seat support of the present application along the CC direction, the rotating shaft 3 and the small synchronous pulley 31 are connected by pins and rotate synchronously. Specifically, the rotating shaft 3 is provided with a pin hole arranged along the diameter of the cross section of the rotating shaft 3, and the small synchronous pulley 31 is provided with a pin hole arranged along the diameter of the small synchronous pulley 31. The pin hole on the rotating shaft 3 matches the pin hole on the small synchronous pulley 31. The first locking pin 30 is marked in the figure. The two pin holes and the first locking pin 30 cooperate to make the rotating shaft 3 and the small synchronous pulley 31 pin connection; the fixed shaft 4 and the large synchronous pulley 41 are pin-connected and rotate synchronously. Specifically, the fixed shaft 4 is provided with a pin hole arranged along the diameter of the cross section of the fixed shaft 4, and the large synchronous pulley 41 is provided with a pin hole arranged along the diameter of the large synchronous pulley 41. The pin hole on the fixed shaft 4 matches the pin hole on the large synchronous pulley 41. A second locking pin 40 is marked in the figure. The two pin holes and the second locking pin 40 are used to cooperate with the fixed shaft 4 and the second locking pin 40 to pin-connect the fixed shaft 4 with the large synchronous pulley 41.

[0060] Regarding the tensioning wheel 51 , further, a tensioning shaft 52 is provided between the small synchronous pulley 31 and the large synchronous pulley 41 . The tensioning wheel 51 is provided on the tensioning shaft 52 , and the tensioning wheel 51 can rotate around the tensioning shaft 52 .

[0061] See also Figure 6 , shown is a second perspective stereoscopic image of the seat support and the seat of the present application. The present application also provides a seat, which includes a seat 1 and the above-mentioned seat support. The seat 1 is installed on the mounting plate 2 by bolt connection, thereby completing the installation of the seat 1 and the seat support.

[0062] Regarding the tensioning wheel 51, further, a tensioning rod 53 is provided between the small synchronous pulley 31 and the large synchronous pulley 41, one end of the tensioning rod 53 is connected to the swing arm 6, the tensioning rod 53 is connected to the tensioning shaft 52, and the tensioning shaft 52 is rotationally connected to the tensioning wheel 51.

[0063] Preferably, in this embodiment, the tension rod 53 and the tension shaft 52 are connected by bolts, the tension rod 53 is provided with a bolt through hole, the tension shaft 52 is provided with a threaded hole, and the bolt through hole on the tension rod 53 matches the threaded hole on the tension shaft 52.

[0064] Method of using the seat support: After the user sits on the seat 1, the seat 1 is rotated to drive the mounting plate 2 to rotate, and the rotation of the mounting plate 2 drives the rotating shaft 3 to rotate, and the rotation of the rotating shaft 3 drives the small synchronous pulley 31 to rotate, and the small synchronous pulley 31 rotates and drives the rotating shaft 3 to rotate circumferentially around the fixed axis 4 through the synchronous toothed belt 5, thereby driving the seat 1 to move along the circumferential rotation path of the rotating shaft 3, thereby achieving the technical effect of the seat and the user rotating and moving to the preset driving position or operating position.

[0065] Working principle of the seat support: when the user rotates the seat 1 counterclockwise, the seat 1 drives the rotating shaft 3 and the small synchronous pulley 31 to rotate counterclockwise through the mounting plate 2, and the synchronous toothed belt 5 is driven by the small synchronous pulley 31 to transmit counterclockwise. Since the large synchronous pulley 41 is fixed on the fixed shaft 4, the counterclockwise transmission of the synchronous toothed belt 5 causes the swing arm bracket to make a relative movement clockwise around the fixed shaft 4, so as to achieve the effect of increasing the rotation range of the seat by rotating the seat 1 and opening the swing arm to the same side of the rotation direction of the seat 1.

[0066] Adjustment scheme of the seat support and its beneficial effects: When in the driving state, the seat 1 and the swing arm 6 are in a folded state, which does not affect the use space of the driving position. When it needs to be adjusted to the operating state, the user adjusts the toggle rod 71 to put the positioning locking mechanism 7 in an unlocked state. While rotating the seat, the swing arm in the folded state opens, which can increase the rotation range of the seat. When it is rotated to the required preset position, the toggle rod 71 is adjusted to put the positioning locking mechanism 7 in a locked state, the seat 1 is in a locked state, and the seat has sufficient supporting rigidity. The above-mentioned seat support adjustment scheme can meet the use needs of sharing one seat for driving and construction operations in most cases, saves the use space in the cab, and reduces the work intensity of the operator.

Claims

1. A seat support, characterized in that: The seat support comprises a mounting plate (2), a rotating shaft (3) and a fixed shaft (4); The mounting plate (2) is arranged on the rotating shaft (3), and the mounting plate (2) is used to mount the seat (1); a swing arm (6) is arranged between the rotating shaft (3) and the fixed shaft (4), and the two ends of the swing arm (6) are respectively rotatably connected to the rotating shaft (3) and the fixed shaft (4); A transmission mechanism is also provided between the rotating shaft (3) and the fixed shaft (4), and the transmission mechanism cooperates with the swing arm (6) to enable the rotating shaft (3) to rotate in a circumferential direction with the fixed shaft (4) as the central axis.

2. The seat support according to claim 1, characterized in that The transmission mechanism is a synchronous belt mechanism; A small synchronous pulley (31) is provided on the rotating shaft (3); The fixed shaft (4) is provided with a large synchronous pulley (41); A synchronous toothed belt (5) is provided between the rotating shaft (3) and the fixed shaft (4); The small synchronous pulley (31) is connected to the large synchronous pulley (41) for transmission via a synchronous toothed belt (5).

3. The seat support according to claim 1, characterized in that The two ends of the swing arm (6) are respectively provided with a first connecting tube (61) and a second connecting tube (62); The first connecting tube (61) is sleeved and rotatably connected to the rotating shaft (3); The second connecting tube (62) is sleeved and rotatably connected to the fixed shaft (4).

4. The seat support according to claim 1, characterized in that The mounting plate (2) is provided with a positioning locking mechanism (7); The positioning locking mechanism (7) comprises a toggle rod (71), an adjuster (72) and a brake ring (73); The toggle rod (71) is connected to the brake ring (73) via a regulator (72); The brake ring (73) is sleeved on the rotating shaft (3); The toggle rod (71) causes the brake ring (73) to lock or unlock the rotating shaft (3) through the adjuster (72).

5. The seat support according to claim 1, characterized in that The mounting plate (2) is also provided with two support tubes (22) which are symmetrically arranged at intervals; After the seat (1) is installed on the mounting plate (2), the two support tubes (22) are located between the seat (1) and the mounting plate (2), and the two support tubes (22) are used to bear and support the seat (1).

6. The seat support according to claim 1, characterized in that The rotating shaft (3) and the small synchronous pulley (31) are connected by pins and rotate synchronously; The fixed shaft (4) and the large synchronous pulley (41) are connected by a pin.

7. The seat support according to claim 2, characterized in that A tensioning pulley (51) is provided between the small synchronous pulley (31) and the large synchronous pulley (41); The tension wheel (51) is used to adjust the tightness of the synchronous toothed belt (5).

8. The seat support according to claim 1, characterized in that Two bearings (8) are arranged in parallel and at intervals between the rotating shaft (3) and the first connecting tube (61); and two bearings (8) are arranged in parallel and at intervals between the fixed shaft (4) and the second connecting tube (62).

9. The seat support according to claim 8, characterized in that A first accommodating chamber (81) is provided between the rotating shaft (3) and the first connecting cylinder (61); Two first annular grooves (611) are provided on the inner wall side of the first connecting tube (61), and the two first annular grooves (611) are respectively located at two ends of the first connecting tube (61); The two bearings (8) are both installed in the first accommodating cavity (81), the inner rings of the two bearings (8) are both in contact with the rotating shaft (3), and the outer rings of the two bearings (8) are both in contact with the first annular groove (611).

10. The seat support according to claim 9, characterized in that The rotating shaft (3) is provided with a shaft shoulder (32); The shaft shoulder (32) is located between the mounting plate (2) and the first connecting tube (61); Support washers (9) are provided at both ends of the first accommodating cavity (81); One of the support washers (9) is located between the shaft shoulder (32) and the inner ring of the bearing (8) near the end of the mounting plate (2); the other support washers (9) is located between the inner ring of the bearing (8) near the end of the small synchronous pulley (31) and the small synchronous pulley (31).

11. The seat support according to claim 8, characterized in that A second accommodating chamber (82) is provided between the fixed shaft (4) and the second connecting cylinder (62); The inner side wall of the second connecting tube (62) is provided with two second annular grooves (621), and the two second annular grooves (621) are respectively located at two ends of the second connecting tube (62); The two bearings (8) are both installed in the second accommodating cavity (82), the inner rings of the two bearings (8) are both in contact with the fixed shaft (4), and the outer rings of the two bearings (8) are both in contact with the second annular groove (621).

12. The seat support according to claim 11, characterized in that The fixed shaft (4) is provided with an end cover (10); The end cover (10) is located at one end of the fixed shaft (4) close to the mounting plate (2); A supporting washer (9) is provided between the second accommodating cavity (82) and the large synchronous pulley (41); The end cover (10) is fitted with the inner ring of the bearing (8) near the end of the mounting plate (2), and the end cover (10) is used to limit the bearing (8) in the second accommodating cavity (82); the supporting washer (9) is located between the inner ring of the bearing (8) near the end of the large synchronous pulley (41) and the large synchronous pulley (41).

13. A seat, characterized in that: The seat comprises a seat support according to any one of claims 1 to 12.

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