Damping device for central armrest of rear seat of automobile

Abstract

A damping device for a central armrest of an automobile rear-row seat comprises a shell, a damping shaft containing cavity is formed in the shell, and a first damping wing barrier strip and a second damping wing barrier strip are formed on the cavity wall of the damping shaft containing cavity; the hollow damping shaft is arranged in the damping shaft accommodating cavity, a first damping device and a second damping device are formed on the outer wall of the damping shaft, the first damping device, the second damping device and the cavity wall of the damping shaft accommodating cavity form a friction damping pair, and the first damping device and the second damping device are alternately matched with the first damping block barrier strip and the second damping block barrier strip in a use state; the shell cover is matched with the left end of the shell, a shell cover center hole is formed in the center of the shell cover, the left end of the damping shaft stretches into the shell cover center hole, the right end of the damping shaft stretches into a damping shaft matching hole formed in the center of the right cavity wall of the damping shaft containing cavity of the shell, and the right end of the damping shaft stretches into the damping shaft matching hole. The invention has the advantages that: a good friction damping effect is embodied; the torque attenuation risk is avoided; good modularization is embodied; the structure is simple, and economical efficiency is good.

Description

Technical Field

[0001] This invention belongs to the technical field of automotive seat components, specifically relating to a damping device for the center armrest of a rear seat in a car. Background Technology

[0002] The damping devices in the aforementioned application scenarios play a crucial role in enhancing the driving experience. Their core function is to control the movement speed of the rear center armrest (also known as the "large armrest") and absorb vibrations by generating resistance. Specifically, their positive effects are: when the armrest is lowered, the damper generates resistance, preventing a sudden drop due to gravity and avoiding a clanging sound, thus enhancing the feel; when raised and flipped upwards, located in the armrest storage cavity between the two adjacent seat backs in the rear of the car, i.e., when the armrest is closed, the slight resistance provided by the damper prevents swaying and noise during vehicle bumps; ensuring safety by preventing fingers from being pinched or violently impacting the seats due to a rapid drop.

[0003] An example of using an angle adjuster and coil spring structure to dampen the rear center armrest of a car is patent CN223396082U. Although the specific structure of the damping cylinder is not disclosed, a full reading of the specification reveals that it focuses on adjusting the armrest's position via a coil spring angle adjuster. This results in a highly complex structure, involving multiple components such as a load-bearing bracket, connecting end tube, rotating spindle, and coil spring. The damping cylinder may be an auxiliary friction plate or a single rotary damper.

[0004] Using assisted damping hinges is a viable option, a typical example being patent CN217994233U. This patent's working principle relies on the elastic deformation of metal; that is, a torsion spring generates a restoring force through twisting, and a coil spring generates friction or tension through coiling. However, this structure is susceptible to torque attenuation due to metal fatigue after prolonged and repeated use. Summary of the Invention

[0005] The objective of this invention is to provide a damping device for the center armrest of a rear seat in a car that helps to achieve good built-in friction damping, avoids metal fatigue and torque attenuation risks caused by long-term repeated use, and is conducive to good modularity and facilitates significant simplification of structure.

[0006] The present invention achieves its objective by providing a damping device for the center armrest of a rear seat in an automobile, comprising a housing that forms a damping shaft receiving cavity. On the cavity wall of the damping shaft receiving cavity, and parallel to the length direction of the cavity, a first damping wing and a second damping wing are formed, protruding from the cavity wall and spaced 180° apart from each other around the circumference of the damping shaft receiving cavity; a hollow damping shaft rotatably disposed within the damping shaft receiving cavity; and on the outer wall of the damping shaft, and parallel to the length direction of the damping shaft, a first damping device and a second damping wing are formed. Two damping devices, the first and second damping devices forming a friction damping pair with the cavity wall of the damping shaft receiving cavity and spaced 180° apart from each other around the circumference of the damping shaft; in use, the first and second damping devices alternately cooperate with the first and second damping block stops; a housing cover, which cooperates with the left end of the housing, and a central hole is formed in the center of the housing cover. The left end of the damping shaft is inserted into the central hole of the housing cover, while the right end of the damping shaft is inserted into a damping shaft mating hole formed in the center of the right cavity wall of the damping shaft receiving cavity of the housing.

[0007] In a specific embodiment of the present invention, a pair of housing fixing wing plates are provided on the outer wall of the rear side of the housing and extending along the length of the housing for fixing the housing to the handrail in the use state. The cross-sectional shapes of the pair of housing fixing wing plates are in an inverted V-shape relationship with each other, and the space between the pair of fixing wing plates is configured as a handrail fixing member insertion cavity.

[0008] In another specific embodiment of the present invention, when the first damping device contacts the upper surface of the first damping bar along its length, the second damping device contacts the lower surface of the second damping bar along its length; and when the first damping device contacts the upper surface of the second damping bar, the second damping device contacts the lower surface of the first damping bar.

[0009] In another specific embodiment of the present invention, the structure of the second damping device is the same as that of the first damping device. The first damping device includes a damping strip support wing and a damping strip. The damping strip support wing is formed on the outer wall of the damping shaft along the length direction of the damping shaft. A damping strip support cavity is formed on the side of the damping strip facing the length direction of the damping strip support wing. The damping strip support cavity is supported on the damping strip support wing. The surface of the damping strip facing the damping shaft receiving cavity forms a friction damping pair with the cavity wall of the damping shaft receiving cavity.

[0010] In another specific embodiment of the present invention, a left journal with a diameter smaller than that of the damping shaft extends to the left from the center of the left end face of the damping shaft, and a right journal of the same type extends to the center of the right end face. The left journal is inserted into the central hole of the housing cover, and the right journal is inserted into the damping shaft mating hole at the center of the right cavity wall of the damping shaft receiving cavity. The left journal through hole of the left journal is connected to the right journal through hole of the right journal.

[0011] In another specific embodiment of the present invention, a journal support sleeve and a left sealing ring with the same outer diameter are sequentially fitted on the left journal from right to left, and a right sealing ring is fitted on the right journal. A left sealing ring cavity with an inner diameter adapted to the outer diameter of the journal support sleeve is formed on the housing cover and at a position to the right of the central hole of the housing cover. The journal support sleeve and the left sealing ring are located in the left sealing ring cavity, and the left sealing ring is sealed to the cavity wall of the left sealing ring cavity. A right sealing ring cavity is formed on the right cavity wall of the damping shaft receiving cavity and at a position to the left of the damping shaft mating hole. The right sealing ring is located in the right sealing ring cavity and is sealed to the cavity wall of the right sealing ring cavity.

[0012] In a further specific embodiment of the present invention, a pair of damping limiting grooves are formed on the right cavity wall of the damping shaft receiving cavity and on the left side of the right cavity wall of the damping shaft receiving cavity, the pair of damping limiting grooves being 180° apart from each other in the circumferential direction around the right cavity wall of the damping shaft receiving cavity.

[0013] In a further specific embodiment of the present invention, the damping strip is a non-metallic damping strip, which is made of polyurethane, polyvinyl chloride, epoxy resin, butyl rubber, nitrile rubber, silicone rubber or polysulfide rubber.

[0014] In yet another specific embodiment of the present invention, an internal thread is formed on the inner wall of the left cavity of the damping shaft receiving cavity of the housing, and an external thread is formed on the outer wall of the housing cover and around the circumference of the housing cover. The external thread of the housing cover is threadedly engaged with the internal thread of the housing. A housing cover sealing ring is fitted on the housing cover and located to the right of the area of ​​the internal thread of the housing. The housing cover sealing ring is in sealing engagement with the cavity wall of the damping shaft receiving cavity.

[0015] In yet another specific embodiment of the present invention, a set of recessed housing cover rotation operation cavities are formed on the left side of the housing cover.

[0016] The technical advantages of the solution provided by this invention are as follows: Since the housing can be rotated by the armrest shaft in use, the cavity wall of the damping shaft receiving cavity of the housing and the first and second damping devices of the damping shaft can exhibit good frictional damping effect; Since the first and second damping devices located on the damping shaft can avoid the problem of metal fatigue caused by long-term repeated use, there is no risk of torque attenuation; The fit between the housing, the damping shaft and the housing cover reflects good modularity; Since the overall structure is very simple, it is not only convenient and quick to manufacture and assemble, but also has good economic efficiency. Attached Figure Description

[0017] Figure 1 This is an assembly structure diagram of the present invention; Figure 2 for Figure 1 A schematic diagram showing the left side after the housing cover has been removed and the assembly is complete; Figure 3 for Figure 1 A schematic diagram of the overall coordination from an external perspective.

[0018] In the diagram: 1. Housing; 11. Damping shaft receiving cavity; 111. First damping wing retainer; 112. Second damping wing retainer; 113. Housing internal thread; 12. Right cavity wall of damping shaft receiving cavity; 121. Damping shaft mating hole; 122. Right sealing ring cavity; 123. Damping limiting groove; 13. Housing fixing wing plate; 131. Handrail fixing component insertion cavity; 2. Damping shaft; 21. First damping device; 211. Damping strip support wing; 212. Damping strip; 2121. Damping strip support cavity; 22. Second damping device; 221. Damping strip support wing plate; 222. Damping strip support wing plate sleeve; 2221. Damping strip support wing plate sleeve cavity; 23. Left journal; 231. Journal support sleeve; 232. Left sealing ring; 233. 24. Right journal, 241. Right sealing ring, 242. Right journal through hole; 3. Housing cover, 31. Central hole of housing cover, 32. Left sealing ring cavity, 33. External thread of housing cover, 34. Sealing ring of housing cover, 35. Rotation operation cavity of housing cover. Detailed Implementation

[0019] In order to better understand the technical essence and beneficial effects of the present invention, the applicant provides a detailed description below by way of embodiments. However, the description of the embodiments is not intended to limit the present invention. Any formal but not substantive equivalent transformations made based on the concept of the present invention should be considered within the scope of the present invention.

[0020] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on the current position. Figure 1 The location and state of the object are examples, and therefore should not be construed as a special limitation on the technical solution provided by the present invention.

[0021] Please see Figure 1 The diagram shows a housing 1, which forms a damping shaft receiving cavity 11. On the cavity wall of the damping shaft receiving cavity 11, parallel to its length, are a first damping wing 111 (also referred to as "first damping wing") and a second damping wing 112 (also referred to as "second damping wing") protruding from the cavity wall. The first and second damping wing 111 and 112 are spaced 180° apart from each other around the circumference of the damping shaft receiving cavity 11. A hollow damping shaft 2 is shown, rotatably disposed within the damping shaft receiving cavity 11. On the outer wall of the damping shaft 2, parallel to its length, are a first damping device 21 and a second damping device 22. The first and second damping devices 21... 22 forms a friction damping pair with the cavity wall of the damping shaft receiving cavity 11 and is 180° apart from each other in the circumferential direction around the damping shaft 2. In the use state, the first and second damping devices 21 and 22 alternately cooperate with the aforementioned first and second damping block stops 111 and 112. The alternation mentioned here depends on the state of the car center armrest being flipped up or down in the use state. A housing cover 3 is shown, which cooperates with the left end of the aforementioned housing 1. A housing cover central hole 31 is formed in the center of the housing cover 3. The left end of the aforementioned damping shaft 2 is inserted into the housing cover central hole 31, while the right end of the damping shaft 2 is inserted into the damping shaft mating hole 121 formed in the center of the right cavity wall 12 of the damping shaft receiving cavity 11 of the housing 1.

[0022] Please see Figure 1 and Figure 2 as well as Figure 3 On the rear side of the aforementioned housing 1 ( Figure 2 On the outer wall of the housing 1 (in its left position), extending along the length of the housing 1, there is a pair of housing fixing wing plates 13 for fixing the housing 1 to the armrest in the use state. The cross-sectional shapes of the pair of housing fixing wing plates 13 form an inverted V-shape relationship with each other, and the space between the pair of fixing wing plates 13 constitutes the armrest fixing member insertion cavity 131. Thus, in the use state, the housing 1 is fixed to the rear center armrest (large armrest) of the car by the pair of housing fixing wing plates 13.

[0023] When the first damping device 21 contacts the upper surface of the first damping bar 111 along its length, the second damping device 22 contacts the lower surface of the second damping bar 112 along its length. When the first damping device 21 contacts the upper surface of the second damping bar 112, the second damping device 22 contacts the lower surface of the first damping bar 111. Figure 2 The illustration shows the rear center armrest of a car flipped up and embedded in a cavity or storage compartment located between two adjacent seat backs in the rear of the car.

[0024] The structure of the aforementioned second damping device 22 is the same as that of the aforementioned first damping device 21. The first damping device 21 includes a damping strip support wing 211 and a damping strip 212. The damping strip support wing 211 is directly formed on the outer wall of the damping shaft 2 along the length direction of the aforementioned damping shaft 2. A damping strip support cavity 2121 is formed on the side of the damping strip support wing 211 facing the length direction of the damping strip support wing 211. The damping strip support cavity 2121 supports or is sleeved on the damping strip support wing 211. The surface of the damping strip 212 facing the aforementioned damping shaft receiving cavity 11 forms a friction damping pair with the cavity wall of the damping shaft receiving cavity 11.

[0025] Similarly, the aforementioned second damping device 22 includes a damping strip support wing plate 221 and a damping strip support wing plate sleeve 222. The damping strip support wing plate 221 is directly formed on the outer wall of the damping shaft 2 along the length direction of the aforementioned damping shaft 2 and is 180° away from the aforementioned damping strip support wing 211 in the circumferential direction of the damping shaft 2. The damping strip support wing plate sleeve 222 has a damping strip support wing plate sleeve cavity 2221 on the side facing the length direction of the damping strip support wing plate 221. The damping strip support wing plate sleeve cavity 2221 supports or is sleeved on the damping strip support wing plate 221, and the surface of the damping strip support wing plate sleeve 222 facing the damping shaft receiving cavity 11 forms a friction damping pair with the cavity wall of the damping shaft receiving cavity 11. The applicant needs to clarify that although the damping strip support wing 211 and the damping strip support wing plate 221 have different names, they are essentially the same. Similarly, the damping strip 212 and the damping strip support wing plate sleeve strip 222 have different names, but are completely identical in substance.

[0026] A left journal 23 with a diameter smaller than that of the damping shaft 2 extends to the left from the center of the left end face of the aforementioned damping shaft 2, while a right journal 24 with the same diameter as the left journal 23 extends to the center of the right end face. The left journal 23 is inserted into the central hole 31 of the housing cover 3, while the right journal 24 is inserted into the damping shaft mating hole 121 at the center of the right cavity wall 12 of the damping shaft receiving cavity 11. The left journal through hole 233 of the left journal 23 is connected to the right journal through hole 242 of the right journal 24.

[0027] A journal support sleeve 231 and a left sealing ring 232 with the same outer diameter are sequentially fitted on the left journal 23 from right to left. A right sealing ring 241 is fitted on the right journal 24. The left and right sealing rings 232 and 241 are preferably rubber rings. A left sealing ring cavity 32 with an inner diameter that matches the outer diameter of the journal support sleeve 231 is formed on the housing cover 3 and at the right side of the central hole 31 of the housing cover. The journal support sleeve 231 and the left sealing ring 232 are located in the left sealing ring cavity 32 and the left sealing ring 232 is sealed to the cavity wall of the left sealing ring cavity. A right sealing ring cavity 122 is formed on the right cavity wall 12 of the damping shaft receiving cavity and at the left side corresponding to the damping shaft mating hole 121. The right sealing ring 241 is located in the right sealing ring cavity 122 and is sealed to the cavity wall of the right sealing ring cavity.

[0028] A pair of damping limiting grooves 123 are formed on the right cavity wall 12 of the aforementioned damping shaft receiving cavity and on the left side of the right cavity wall 12 of the damping shaft receiving cavity. The pair of damping limiting grooves 123 are spaced 180° apart from each other in the circumferential direction around the right cavity wall 12 of the damping shaft receiving cavity.

[0029] In this embodiment, the aforementioned damping strip 212 is a non-metallic damping strip, preferably a rubber damping strip, such as butyl rubber damping strip, nitrile rubber damping strip, silicone rubber damping strip or polysulfide rubber damping strip, but it can also be a damping strip made of polyurethane, polyvinyl chloride or epoxy resin.

[0030] Depend on Figure 1 As shown, an internal thread 113 is formed on the inner wall of the left cavity of the damping shaft receiving cavity 11 of the aforementioned housing 1, and an external thread 33 is formed on the outer wall of the aforementioned housing cover 3 and around the circumference of the housing cover 3. The housing cover 3 and the housing internal thread 113 are threadedly engaged to fix the housing cover 3 and the damping shaft 2 is rotatably confined within the damping shaft receiving cavity 11. A housing cover sealing ring 34 is fitted on the housing cover 3 and located to the right of the area of ​​the housing internal thread 113. The housing cover sealing ring 34 is in a sealing engagement with the cavity wall of the aforementioned damping shaft receiving cavity 11.

[0031] Preferably, a set of recessed housing cover rotation operation cavities 35 are formed on the left side of the aforementioned housing cover 3. The function of these cavities is to rotate the housing cover 3 by means of a tool inserted into the housing cover rotation operation cavities 35, for example, to tighten it to the housing 1, or to remove it from the housing 1 during maintenance.

[0032] During assembly, the preferred damping materials are high-viscosity damping grease, high-viscosity silicone oil (such as polydimethylsiloxane), inorganic thickeners (such as fumed silica, organobentonite), polybutene, fine calcium carbonate or talc, etc. In this embodiment, a silicone damping grease (paste) thickened with fumed silica is used.

[0033] In use, the aforementioned pair of housing fixing wing plates 13 are used to fix the center armrest of the rear seat of the car (also known as the "central armrest"). The armrest shaft of the aforementioned armrest structure passes through the damping shaft 2, that is, it passes through the left journal through hole 233 and exits through the right journal through hole 242. Both ends of the armrest shaft are fixed to the seat back. The left and right journal through holes 233 and 242 are internal hexagonal holes so that the aforementioned armrest shaft, that is, the armrest shaft with a hexagonal cross-section, can reliably cooperate with the left and right journal through holes 233 and 242 to prevent the damping shaft 2 from rotating.

[0034] Figure 2 The state shown is essentially the state in which the center armrest of the rear seat of the car is flipped upward into the armrest storage (accommodation) cavity formed between the backrests of the two adjacent rear seats. In this state, one side of the damping strip 212 and the damping strip support wing sleeve strip 222 respectively contacts the first and second damping wing baffles 111 and 112, and the surface of the armrest (the surface facing downward when flipped downward) is basically on the same plane as the seat back.

[0035] To fold the handrail downwards, if it is manual, the handrail can be folded downwards by hand. The handrail then drives the aforementioned housing fixing wing plate 13. As the handrail folds downwards, the housing fixing wing plate 13 provides damping, causing the handrail to descend at a constant speed. When the damping strip 212 and the damping strip support wing plate sleeve 222 pass the aforementioned damping limiting groove 123, the damping force increases, and the descent speed of the handrail slows down until the handrail is fully folded down. At this point, the other side of the damping strip 212 and the damping strip support wing plate sleeve 222 respectively contacts the first and second damping wing baffles 111 and 112, that is, with… Figure 2 The contact states shown are reversed. For example, with Figure 2 Taking the positional state as an example, the damping strip 212 becomes contact with the other side of the second damping wing baffle 112, while the damping strip support wing plate sleeve 222 becomes contact with the right side of the first damping wing baffle 111 (with... Figure 2 (Taking the position shown as an example) Contact. Since the process of flipping the armrest upwards is the reverse of the above, it will not be described again. Of course, if it is a high-end vehicle, the armrest can be flipped automatically. In that case, since the damping mechanism of this invention is the same, it will not be described again.

[0036] In summary, the technical solution provided by this invention makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effects column.

Claims

1. A damping device for the center armrest of a rear seat in a car, characterized in that: The system includes a housing (1) that forms a damping shaft receiving cavity (11). A first damping wing (111) and a second damping wing (112) are formed on the cavity wall of the damping shaft receiving cavity (11) in a position parallel to the length direction of the cavity. The first and second damping wing (111, 112) are spaced 180° apart from each other around the circumference of the damping shaft receiving cavity (11). A hollow damping shaft (2) is rotatably disposed within the damping shaft receiving cavity (11). A first damping device (21) and a second damping device (22) are formed on the outer wall of the damping shaft (2) in a position parallel to the length direction of the damping shaft. The first and second damping devices (21, 22) are connected to the damping shaft receiving cavity (11). The walls of the damping shaft receiving cavity (11) form a friction damping pair and are spaced 180° apart from each other around the circumference of the damping shaft (2). In use, the first and second damping devices (21, 22) alternately cooperate with the first and second damping block stops (111, 112). A housing cover (3) cooperates with the left end of the housing (1). A housing cover central hole (31) is formed in the center of the housing cover (3). The left end of the damping shaft (2) is inserted into the housing cover central hole (31), while the right end of the damping shaft (2) is inserted into the damping shaft mating hole (121) in the center of the right cavity wall (12) of the damping shaft receiving cavity (11) of the housing (1).

2. The damping device for the center armrest of the rear seat of an automobile according to claim 1, characterized in that: On the outer wall of the rear side of the housing (1) and extending along the length of the housing (1), there is a pair of housing fixing wing plates (13) for fixing the housing (1) to the handrail in the use state. The cross-sectional shapes of the pair of housing fixing wing plates (13) form an inverted V-shape relationship with each other, and the space between the pair of fixing wing plates (13) constitutes the handrail fixing member insertion cavity (131).

3. The damping device for the center armrest of the rear seat of an automobile according to claim 1, characterized in that: When the first damping device (21) contacts the upper surface of the first damping bar (111) along its length, the second damping device (22) contacts the lower surface of the second damping bar (112) along its length. When the first damping device (21) contacts the upper surface of the second damping bar (112), the second damping device (22) contacts the lower surface of the first damping bar (111).

4. The damping device for the center armrest of the rear seat of an automobile according to claim 1 or 3, characterized in that: The structure of the second damping device (22) is the same as that of the first damping device (21). The first damping device (21) includes a damping strip support wing (211) and a damping strip (212). The damping strip support wing (211) is formed on the outer wall of the damping shaft (2) along the length direction of the damping shaft (2). The damping strip (212) has a damping strip support cavity (2121) on one side facing the length direction of the damping strip support wing (211). The damping strip support cavity (2121) is supported on the damping strip support wing (211). The surface of the damping strip (212) facing the damping shaft receiving cavity (11) forms a friction damping pair with the cavity wall of the damping shaft receiving cavity (11).

5. The damping device for the center armrest of the rear seat of an automobile according to claim 1, characterized in that: A left journal (23) with a diameter smaller than that of the damping shaft (2) extends to the left from the center of the left end face of the damping shaft (2), while a right journal (24) with the same diameter as the left journal (23) extends to the center of the right end face. The left journal (23) is inserted into the central hole (31) of the housing cover (3), while the right journal (24) is inserted into the damping shaft mating hole (121) at the center of the right cavity wall (12) of the damping shaft receiving cavity (11). The left journal through hole (233) of the left journal (23) is connected to the right journal through hole (242) of the right journal (24).

6. The damping device for the center armrest of the rear seat of an automobile according to claim 5, characterized in that: A journal support sleeve (231) and a left sealing ring (232) with the same outer diameter are sequentially fitted on the left journal (23) from right to left. A right sealing ring (241) is fitted on the right journal (24). A left sealing ring cavity (32) with an inner diameter that matches the outer diameter of the journal support sleeve (231) is formed on the housing cover (3) and located to the right of the central hole (31) of the housing cover. The journal support sleeve (231) and the left sealing ring (232) are located in the left sealing ring cavity (32) and the left sealing ring (232) is sealed to the cavity wall of the left sealing ring cavity. A right sealing ring cavity (122) is formed on the right cavity wall (12) of the damping shaft receiving cavity and located to the left of the damping shaft mating hole (121). The right sealing ring (241) is located in the right sealing ring cavity (122) and is sealed to the cavity wall of the right sealing ring cavity.

7. The damping device for the center armrest of a rear seat in an automobile according to claim 1, 2, 3, 5, or 6, characterized in that: A pair of damping limiting grooves (123) are formed on the right cavity wall (12) of the damping shaft receiving cavity and on the left side of the right cavity wall (12) of the damping shaft receiving cavity. The pair of damping limiting grooves (123) are spaced 180° apart from each other in the circumferential direction around the right cavity wall (12) of the damping shaft receiving cavity.

8. The damping device for the center armrest of the rear seat of an automobile according to claim 4, characterized in that: The damping strip (212) is a non-metallic damping strip, which is made of polyurethane, polyvinyl chloride, epoxy resin, butyl rubber, nitrile rubber, silicone rubber or polysulfide rubber.

9. The damping device for the center armrest of the rear seat of an automobile according to claim 1, characterized in that: An internal thread (113) is formed on the inner wall of the left cavity of the damping shaft receiving cavity (11) of the housing (1), and an external thread (33) is formed on the outer wall of the housing cover (3) and around the circumference of the housing cover (3). The external thread (33) is threadedly engaged with the internal thread (113). A housing cover sealing ring (34) is fitted on the housing cover (3) and located on the right side of the area of ​​the internal thread (113). The housing cover sealing ring (34) is sealed with the cavity wall of the damping shaft receiving cavity (11).

10. The damping device for the center armrest of the rear seat of an automobile according to claim 1 or 9, characterized in that: A set of recessed housing cover rotation operation cavities (35) are formed on the left side of the housing cover (3).

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