Rotary friction damper for seat backrest

Abstract

The utility model discloses a seat backrest rotary friction damper, which effectively increases the anti-collision safety performance of a seat, and comprises an upper side rotating body and a lower side rotating body, the lower side surface of the upper side rotating body is provided with a first annular groove, and the interior of the first annular groove is fixedly connected with a plurality of limiting columns; the upper side of the lower side rotating body is fixedly connected with a damping frame, multiple sets of limiting assemblies corresponding to the limiting columns are evenly distributed on the periphery of the damping frame, and a damping block corresponding to the first annular groove is arranged between every two adjacent sets of limiting assemblies. According to the automobile whiplash testing device, the better damping effect is effectively achieved, impact on passengers can be reduced, the device can be conveniently installed and fixed, and the testing performance of automobile whiplash testing is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seat accessories and relates to a seat back rotation friction damper. Background Art

[0002] With the development of the automobile industry, the passive safety performance of automobiles has been continuously improved, from initially protecting the lives of passengers in the car to gradually reducing injuries. In safety testing, there are different forms of frontal collisions and side collisions to simulate various traffic accidents in the real world, but one form of accident has been overlooked, namely low-speed rear collisions. This type of accident has a high incidence rate, but has not received much attention due to the small number of casualties. Accident statistics in recent years show that the incidence rate of whiplash injuries in low-speed rear collisions is extremely high, and this injury has brought an increasingly serious burden to the injured individuals and society.

[0003] Whiplash injury refers to the whip-like movement of the neck of the driver and passengers of the collided vehicle under the combined effect of the collision acceleration and the head inertia force in a rear-end collision accident. In order to reduce whiplash injuries, in addition to optimizing the seat shape and headrest, it is also possible to provide damping for the rotation of the seat back relative to the seat cushion, so that when the car is rear-ended and excessive force is transmitted to the passenger's back through the backrest, the backrest can be rotated relative to the cushion, thereby reducing the force transmitted to the passenger's back by the backrest during rear-end collision and reducing whiplash injuries. Therefore, a seat back rotation friction damper is needed to reduce whiplash injuries to passengers. Utility Model Content

[0004] In view of the above problems, the utility model proposes a seat back rotation friction damper, which well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A seat back rotation friction damper comprises an upper rotating body and a lower rotating body, wherein a first annular groove is provided on the lower side of the upper rotating body, and a plurality of limit posts are fixedly connected inside the first annular groove;

[0007] A damping frame is fixedly connected to the upper side of the lower rotating body, and a plurality of groups of limiting components corresponding to the limiting columns are evenly distributed on the outer circumference of the damping frame. A damping block corresponding to the first annular groove is provided between every two adjacent groups of limiting components, and the damping frame, the damping block and the side wall of the first annular groove are interference fit to form a rotation damping structure.

[0008] Preferably, each group of the limiting components includes a first limiting block and a second limiting block, and a travel area is formed between the first limiting block, the second limiting block and the washing annular groove of each group of limiting components, and each limiting column is placed inside the travel area.

[0009] Preferably, a reinforcement ring is fixedly connected to the upper side of the upper rotating body, and a plurality of first fixing grooves are provided on the upper side of the reinforcement ring.

[0010] Preferably, a second fixing block is fixedly connected to the lower side of the damping frame, a fixing through hole is opened in the middle of the second fixing block, a plurality of second fixing holes are evenly distributed on the circumference of the second fixing block, and a positioning protrusion is fixedly connected to the inner side wall of one of the second fixing holes.

[0011] Preferably, an arc-shaped surface is provided in the middle of the lower rotating body.

[0012] Preferably, there are four of each of the limiting assembly, the damping block and the limiting column.

[0013] Preferably, the horizontal cross-section of the travel area is fan-shaped, and the central angle of the fan-shaped ring is 15°.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The utility model has a damping frame, a damping block and a first annular groove. After assembly, the damping frame, the damping block and the first annular groove are interference fit, and rotation damping can be provided through friction between the damping block and the side wall of the first annular groove, thereby achieving a good damping effect.

[0016] 2. The utility model has a first limit block and a second limit block, which can not only fix the damping block relative to the damping frame, but also limit the maximum rotation angle of the damping column. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0019] Figure 3 The figure is a schematic diagram of the explosion structure of the utility model from an upward viewing angle.

[0020] Figure 4 It is a schematic diagram of the shape of the middle stroke area of ​​the utility model.

[0021] In the figure: 1. upper rotating body; 2. lower rotating body; 3. first annular groove; 4. limiting column; 5. damping frame; 6. damping block; 7. first limiting block; 8. second limiting block; 9. travel area; 10. reinforcement ring; 11. first fixing groove; 12. second fixing block; 13. fixing through hole; 14. second fixing hole; 15. positioning protrusion; 16. arc surface. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The following is combined with Figure 1-Figure 4 The specific implementation modes of the present utility model are further described in detail.

[0024] Depend on Figure 1-Figure 4 The utility model comprises an upper rotating body 1 and a lower rotating body 2. In order to achieve a better damping effect, a first annular groove 3 is provided on the lower side of the upper rotating body 1. A plurality of limiting columns 4 are fixedly connected inside the first annular groove 3.

[0025] A damping frame 5 is fixedly connected to the upper side of the lower rotating body 2, and multiple groups of limit components corresponding to the limit columns 4 are evenly distributed on the outer periphery of the damping frame 5. A damping block 6 corresponding to the first annular groove 3 is provided between each two adjacent groups of the limit components. The damping frame 5, the damping block 6 and the side wall of the first annular groove 3 are interference-fitted to form a rotation damping structure;

[0026] It should be noted that: after the upper rotating body 1 and the lower rotating body 2 are assembled, the damping frame 5 and the damping block 6 are both located inside the first annular groove 3, and the damping frame 5 and the damping block 6 cooperate with each other and have an interference fit with the first annular groove 3. At this time, when the upper rotating body 1 and the lower rotating body 2 rotate, the friction between the damping block 6 and the side wall of the first annular groove 3 provides rotation damping;

[0027] Further, by Figure 1-Figure 4 It is given that, in order to reduce the impact on passengers, each group of the limiting components includes a first limiting block 7 and a second limiting block 8, and a travel area 9 is formed between the first limiting block 7 and the second limiting block 8 of each group of limiting components and the washing annular groove, and each of the limiting columns 4 is placed inside the travel area 9;

[0028] When in use, the lower rotating body 2 can be fixedly connected to the rotating shaft of the seat back, and the upper rotating body 1 can be fixedly connected to the seat back. When the seat back is adjusted normally through the backrest angle adjustment device, the seat back is adjusted in angle through the friction between the damping block 6 and the first annular groove 3. When the vehicle collides (such as rear-end collision) and the passenger tends to impact the seat backward, since the rotating shaft of the seat back is in a locked state, the seat back will drive the upper rotating body 1 to drive the limit column 4 to rotate. At this time, the damping block 6 rotates relative to the first annular groove 3 and provides rotation damping of the seat back through friction, providing a buffer for the passenger's backward movement. While the upper rotating body 1 drives the limit column 4 to rotate, the limit column 4 will also move in the travel area 9 to limit the maximum angle of relative rotation between the upper rotating body 1 and the lower rotating body 2.

[0029] Further, by Figure 1-Figure 4 It is given that, in order to facilitate the installation and fixation of the device, a reinforcing ring 10 is fixedly connected to the upper side of the upper rotating body 1, and the reinforcing ring 10 can increase the strength of the upper rotating body 1. A plurality of first fixing grooves 11 are opened on the upper side of the reinforcing ring 10;

[0030] When in use, the upper rotating body 1 can be fixed through the first fixing groove 11 .

[0031] Further, by Figure 1-Figure 4 It is given that, in order to achieve the purpose of positioning the device during installation, a second fixing block 12 is fixedly connected to the lower side of the damping frame 5, a fixing through hole 13 is opened in the middle of the second fixing block 12, and a plurality of second fixing holes 14 are evenly distributed on the circumference of the second fixing block 12, and a positioning protrusion 15 is fixedly connected to the inner side wall of one of the second fixing holes 14;

[0032] When in use, the second fixing block 12 can pass through the rotating shaft of the seat back through the fixing through hole 13, and the second fixing block 12 and the rotating shaft of the seat back can be fixed through the second fixing hole 14. The positioning protrusion 15 can facilitate the installation of the device.

[0033] Further, by Figure 1-Figure 4 It is shown that, in order to facilitate the workers to assemble the device, an arc surface 16 is provided in the middle of the lower rotating body 2;

[0034] During use, when assembling the upper rotating body 1 and the lower rotating body 2 , the damping block 6 can be placed at a corresponding position on the arc surface 16 , and the arc surface 16 can more conveniently squeeze the damping frame 5 and the damping block 6 into the first annular groove 3 .

[0035] Further, by Figure 1-Figure 4It is given that, in order to achieve a better damping effect, the number of the limit assembly, the damping block 6 and the limit column 4 are all 4;

[0036] The horizontal cross-section of the travel area 9 is fan-shaped, and the central angle of the fan-shaped ring is 15°, that is, the maximum relative rotation angle between the upper rotating body 1 and the lower rotating body 2 is 15°, which can achieve better protection effect for passengers.

[0037] When the utility model is used, firstly, the lower rotating body 2 can be fixedly connected to the rotating shaft of the seat back, and the upper rotating body 1 can be fixedly connected to the seat back. When the seat back is adjusted normally through the backrest angle adjustment device, the seat back is adjusted in angle through the friction between the damping block 6 and the first annular groove 3. When the vehicle collides (such as rear-end collision) and causes the passenger to have a tendency to impact the seat backward, since the rotating shaft of the seat back is in a locked state, the seat back will drive the upper rotating body 1 to drive the limit column 4 to rotate. At this time, the damping block 6 rotates relative to the first annular groove 3 and provides rotation damping of the seat back through friction, providing a buffer for the passenger's backward movement. While the upper rotating body 1 drives the limit column 4 to rotate, the limit column 4 will also move in the travel area 9 to limit the maximum angle of relative rotation between the upper rotating body 1 and the lower rotating body 2.

[0038] The utility model has a novel structure, ingenious conception, and simple and convenient operation. Through the design, a better damping effect is effectively achieved, the impact on passengers can be reduced, the installation and fixation of the device is convenient, the anti-collision safety performance of the seat is increased, and the test results of the automobile whiplash test are improved.

[0039] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat back rotation friction damper, comprising an upper rotating body and a lower rotating body, characterized in that: A first annular groove is formed on the lower side of the upper rotating body, and a plurality of limiting columns are fixedly connected inside the first annular groove; A damping frame is fixedly connected to the upper side of the lower rotating body, and a plurality of groups of limiting components corresponding to the limiting columns are evenly distributed on the outer circumference of the damping frame. A damping block corresponding to the first annular groove is provided between every two adjacent groups of limiting components, and the damping frame, the damping block and the side wall of the first annular groove are interference fit to form a rotation damping structure.

2. A seat back rotation friction damper according to claim 1, characterized in that: Each group of the limiting components includes a first limiting block and a second limiting block. A travel area is formed between the first limiting block, the second limiting block and the washing annular groove of each group of limiting components. Each limiting column is placed inside the travel area.

3. The seat back rotation friction damper according to claim 1, characterized in that: A reinforcing ring is fixedly connected to the upper side of the upper rotating body, and a plurality of first fixing grooves are provided on the upper side of the reinforcing ring.

4. A seat back rotation friction damper according to claim 1, characterized in that: A second fixing block is fixedly connected to the lower side of the damping frame, a fixing through hole is opened in the middle of the second fixing block, and a plurality of second fixing holes are evenly distributed on the circumference of the second fixing block, wherein a positioning protrusion is fixedly connected to the inner side wall of one of the second fixing holes.

5. The seat back rotation friction damper according to claim 1, characterized in that: An arc-shaped surface is formed in the middle of the lower rotating body.

6. The seat back rotation friction damper according to claim 1, characterized in that: There are four limit assemblies, four damping blocks and four limit columns.

7. The seat back rotation friction damper according to claim 2, characterized in that: The horizontal cross-section of the travel area is in the shape of a sector ring, and the central angle of the sector ring is 15°.

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