Speed reducer, turnover mechanism and ceiling-mounted television

Abstract

The utility model discloses a kind of reducer, turnover mechanism and ceiling TV, wherein reducer, comprising: reduction gear set, one end of reduction gear set is used to be connected with driving mechanism;Rotary shaft is connected with the other end of reduction gear set;Damping member, it is sleeved on the rotary shaft, and the damping member and the circumferential surface of the rotary shaft abut to generate friction force;Limiting component is connected with the damping member, to fix the damping member;When the driving mechanism is driven rotary shaft rotation by reduction gear set, the damping member can be relatively rotated with the rotary shaft. Through the friction force between damping member and rotary shaft, the static holding force of screen in open state can be effectively improved, and at the same time, the shaking problem caused by screen due to vehicle body bumping in the process of vehicle driving is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile parts, especially relates to a speed reducer, turnover mechanism and ceiling TV. BACKGROUND

[0002] Ceiling TV is easily affected by bumps during vehicle driving due to its special use environment, leading to screen shaking and seriously affecting user's viewing experience. In order to solve this problem, whether manual or electric turnover folding ceiling TV needs to design damping mechanism at the screen turnover folding shaft position to provide static holding force in the open state, thereby improving the use experience of the product. In the past design, the damping mechanism has a design scheme of adopting a plastic structure damping sleeve, which uses the way of the plastic material damping sleeve tightly holding the output shaft. In such design, the plastic material will appear fatigue permanent deformation with the increase of use time, resulting in damping performance attenuation and shorter service life. In addition, the thermal expansion coefficient of the plastic material is too large, which is greatly affected by temperature, thereby leading to low system stability of damping force change.

[0003] In some improved technical solutions, the designer introduces a worm and a bevel gear structure that cooperate with each other. This design can provide self-locking force to provide static holding force for the screen. However, this design still has some problems. First, the assembly gap between the gears will accumulate with the increase of the gear number, eventually leading to slight shaking of the screen and affecting the viewing experience. Second, the multi-stage reduction structure of the gear set increases the complexity of the entire mechanism, not only increasing the production cost, but also increasing the probability of failure. On the other hand, the existing damping assembly often has difficulty in achieving a good balance between providing sufficient static holding force and ensuring smooth rotation. Although excessive damping force can effectively prevent screen shaking, it will also increase the load of the motor and affect the smoothness of the turnover process; while insufficient damping force cannot effectively suppress the vibration during vehicle driving.

[0004] In view of the above problems, the prior art needs to be improved. UTILITY MODEL CONTENTS

[0005] In order to solve the problems of the prior art, the utility model discloses a speed reducer in the first aspect, which comprises:

[0006] A reduction gear set, one end of the reduction gear set is used for connecting with a driving mechanism;

[0007] A rotating shaft connected with the other end of the reduction gear set;

[0008] A damping member sleeved on the rotating shaft, and the damping member abuts against the circumferential surface of the rotating shaft to generate a friction force;

[0009] A limiting component connected with the damping member to fix the damping member;

[0010] When the driving mechanism drives the rotating shaft to rotate through the deceleration gear set, the damping member can rotate relative to the rotating shaft.

[0011] Further, the damping member can comprise:

[0012] a main body, which is sleeved on the rotating shaft and is in interference fit with the rotating shaft;

[0013] an opening, which is arranged on the main body;

[0014] a limiting portion, which is arranged on the outer circle of the main body and can be fixed to limit the rotation of the main body.

[0015] Further, the opening and the limiting portion can be arranged on opposite sides of the main body.

[0016] Further, the limiting portion can extend towards the radial direction of the main body and away from the opening.

[0017] Further, the damping member can comprise a plurality of damping members, which are arranged along the axial direction of the rotating shaft.

[0018] Further, the limiting member can be provided with a limiting groove, which is in fit with the outer contour of the damping member;

[0019] the damping member is located in the limiting groove and is fixed by the limiting groove, and the limiting groove is in interference fit with the damping member.

[0020] Further, the limiting member can comprise:

[0021] a housing;

[0022] a limiting member, which is detachably fixed in the housing and is provided with the limiting groove.

[0023] Further, the housing can be provided with a mounting groove, which is in fit with the outer contour of the limiting member;

[0024] the limiting member is detachably mounted in the mounting groove and is fixed by the mounting groove, and the limiting member is in interference fit with the mounting groove.

[0025] The second aspect of the utility model further discloses a turnover mechanism, which comprises:

[0026] a driving mechanism;

[0027] The speed reducer described above is connected with the driving mechanism;

[0028] The turnover support is connected with the rotating shaft of the speed reducer, and is used for being connected with the screen.

[0029] The utility model discloses a third aspect still discloses a ceiling TV, comprising:

[0030] The screen;

[0031] The turnover mechanism described above.

[0032] The speed reducer, the turnover mechanism and the ceiling TV, through the friction force between the damping member and the rotating shaft, can effectively improve the static holding force of the screen in the open state, and solve the shaking problem of the screen caused by the body bumping during the vehicle driving. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the embodiment of the utility model or the prior art, the following will be briefly introduced the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description only some embodiments are recorded in the utility model, for the ordinary skilled in the art, under the premise of not paying the creative labor, still can obtain other drawings according to these drawings.

[0034] Figure 1 It is the structure schematic view of the turnover mechanism in the embodiment of the utility model;

[0035] Figure 2 It is the local section schematic view of the turnover mechanism in the embodiment of the utility model;

[0036] Figure 3 It is the structure explosion schematic view of the speed reducer in the embodiment of the utility model;

[0037] Figure 4 It is the mechanism schematic view of the damping member in the embodiment of the utility model;

[0038] Figure 5 It is the section schematic view of the turnover mechanism in the embodiment of the utility model.

[0039] Explanation of reference signs:

[0040] 1, speed reducer;

[0041] 11, speed reduction gear set;

[0042] 12, rotating shaft;

[0043] 13, damping member; 131, main body; 132, opening; 133, limiting portion;

[0044] 14, limiting part; 141, limiting groove; 142, shell; 143, limiting piece; 144, mounting groove;

[0045] 2, drive mechanism;

[0046] 3, turnover support. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described clearly and completely below in combination with specific embodiments and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0048] The existing ceiling TV will cause the screen to shake during driving due to the vehicle bumping, which affects the user's use experience. In order to solve this problem, whether it is a manual or electrically folded ceiling TV, a damping mechanism needs to be designed at the screen folding shaft position to provide static holding force in the open state, thereby improving the use experience of the product. The existing electric folding damping mechanism design mainly includes a reduction box shell, a motor, a gear set, an output shaft and a damping mechanism and other components. However, these designs have some limitations in actual application, for example, the assembly gap between the gears accumulates and causes the screen to shake slightly, which cannot effectively solve the problem of screen shaking. Therefore, there is an urgent need for a new technical solution to solve this problem and improve the use experience of the ceiling TV.

[0049] Embodiment one

[0050] In order to solve the above problems, the first aspect of the embodiment discloses a speed reducer 1, as shown in Figure 2 Figure 3 And Figure 5 As shown, comprising:

[0051] A reduction gear set 11, one end of the reduction gear set 11 is used to be connected with a drive mechanism;

[0052] A rotating shaft 12 connected with the other end of the reduction gear set 11;

[0053] A damping piece 13 is sleeved on the rotating shaft 12, and the damping piece 13 is in abutment with the circumferential surface of the rotating shaft 12 to generate friction when moving relative to each other;

[0054] A limiting part 14 connected with the damping piece 13 to fix the damping piece 13;

[0055] When the driving mechanism drives the rotation shaft 12 to rotate through the reduction gear set 11, the damping member 13 can rotate relative to the rotation shaft 12.

[0056] Specifically, the reducer 1, through the design of the reduction gear set 11, converts the high-speed low-torque of the driving mechanism into low-speed high-torque by using the reduction gear set 11 connected with the driving mechanism, and this process is realized by changing the number of teeth between the gear sets, so as to change the transmission ratio to gradually decrease the speed and gradually increase the torque.

[0057] And the damping member 13, as the core component of the reducer 1, is sleeved on the rotation shaft 12. When the driving mechanism drives the reduction gear set 11 to work and drives the rotation shaft 12 to rotate, the rotation shaft 12 can rotate relative to the damping member 13; at this time, the damping force abutting against the circumferential surface of the rotation shaft 12 and the rotating rotation shaft 12 will generate a friction force, thereby providing the necessary damping. In addition, in this embodiment, the limiting component 14 is arranged so that it can fix the damping member 13 and limit the damping member 13 from rotating with the rotation shaft 12, thereby ensuring that the damping member 13 will not be displaced by the rotation of the rotation shaft 12 during the working process.

[0058] The second aspect of the embodiment also discloses a turnover mechanism, as shown in Figure 1 and Figure 2 comprises:

[0059] a driving mechanism 2;

[0060] the reducer 1 described above, connected with the driving mechanism 2;

[0061] a turnover bracket 3 connected with the rotation shaft 12 of the reducer 1, the turnover bracket 3 being used to connect with the screen.

[0062] The turnover mechanism realizes the stability of the screen during the turnover process through the combination of the driving mechanism 2, the reducer 1 and the turnover bracket 3. In the turnover mechanism, the driving mechanism 2 provides a power source; the reducer 1 reduces the rotating speed of the driving mechanism 2 and increases the torque output through the reduction gear set 11 inside it, and provides damping through the damping member 13 abutting on the rotation shaft 12; the turnover bracket 3 connects the rotation shaft 12 of the reducer 1 with the screen, so that the screen can remain stable during the turnover process. Through the above arrangement, the turnover mechanism can effectively reduce the shaking of the screen during the turnover process, and especially the shaking problem caused by the body bumping of the vehicle during driving is effectively solved.

[0063] The third aspect of the embodiment also discloses a ceiling TV, comprising a screen and the reducer 1 described above.

[0064] In the ceiling TV, the decelerator 1 is connected with the driving mechanism 2 through the deceleration gear set 11, the rotating shaft 12 is connected with the deceleration gear set 11, the damping member 13 is sleeved on the rotating shaft 12 and abuts against the circumferential surface of the rotating shaft 12 to generate a friction force, and the limiting component 14 fixes the damping member 13, so that the damping member 13 can rotate relative to the rotating shaft 12 when the driving mechanism 2 drives the rotating shaft 12 to rotate. Through the deceleration and amplification torque effect of the deceleration gear set 11, the friction force provided by the damping member 13 and the fixing effect of the limiting component 14, the problem of screen shaking caused by body bumping of the ceiling TV during vehicle driving is solved.

[0065] Embodiment two

[0066] The embodiment discloses a decelerator 1, a turnover mechanism and a ceiling TV. The embodiment is a further improvement based on the first embodiment, and the improvement is that the specific shape of the damping member 13 is further limited.

[0067] Specifically, as Figure 3 and Figure 4 The damping member 13 comprises:

[0068] a main body 131, which is sleeved on the rotating shaft 12 and is in interference fit with the rotating shaft 12;

[0069] an opening 132, which is arranged on the main body 131.

[0070] In the embodiment, the main body 131 is sleeved on the rotating shaft 12 through interference fit, so that the main body 131 can be closely connected with the rotating shaft 12 and provide sufficient friction force. The opening 132 arranged on the main body 131 can provide a deformation amount for the main body 131, so that the friction force is prevented from being too large, and the installation or adjustment of the main body 131 is facilitated.

[0071] In some embodiments without the opening 132, when the main body 131 is sleeved on the rotating shaft 12, the main body 131 is extruded and deformed by the rotating shaft 12 to adapt to the size of the rotating shaft 12 due to the interference fit. On the premise that the damping is appropriate (that is, the friction force between the damping member 13 and the rotating shaft 12 is appropriate) and the main body 131 is prevented from being damaged due to excessive deformation, the structure has a higher requirement for the design precision and machining precision of the main body 131 and the rotating shaft 12, which obviously increases the design cost and machining cost.

[0072] On the other hand, on the main body 131 without the opening 132, the deformation ability of the main body 131 is mainly determined by the material of the main body 131, and the deformation ability is relatively weak; therefore, when the main body 131 is sleeved on the rotating shaft 12, the deformation degree of the main body 131 caused by adapting to the size of the rotating shaft 12 is small. In the use process of the speed reducer 1, wear occurs between the main body 131 and the rotating shaft 12, so that the friction between the main body 131 and the rotating shaft 12 gradually decreases until the main body 131 and the rotating shaft 12 are no longer in interference fit; therefore, the length of time that the main body 131 and the rotating shaft 12 maintain interference fit depends on the deformation degree of the main body 131, the greater the deformation degree of the main body 131, the longer the time that the main body 131 and the rotating shaft 12 maintain interference fit, that is, the deformation degree of the main body 131 is related to the damping maintenance time of the speed reducer 1. In this way, due to the design that the main body 131 is not provided with the opening 132, the deformation ability of the main body 131 is relatively weak, so that the damping maintenance time of the speed reducer 1 is short, which affects the durability of the damper.

[0073] In the embodiment, the structure of the main body 131 is changed by the opening 132, so that the main body 131 can obtain greater deformation ability through optimized structural design, increase the damping maintenance time of the speed reducer 1, and improve the durability of the damper. In addition, the main body 131 with this structure can prevent excessive friction due to its greater deformation ability. Specifically, in some embodiments, the main body 131 can be made of metal or high-strength plastic material to provide sufficient strength and wear resistance. The opening 132 can be designed in the form of a longitudinal slit to adapt to the size change of the rotating shaft 12 during installation.

[0074] In other preferred embodiments, as shown in Figure 3 and Figure 4 The damping member 13 further comprises:

[0075] A limiting portion 133 is arranged on the outer circle of the main body 131, and the limiting portion 133 can be fixed to limit the rotation of the main body 131.

[0076] In this embodiment, the limiting portion 133 is arranged on the outer circle of the main body 131, which can provide an action site for fixing the main body 131 without affecting the connection between the inner circle of the main body 131 and the rotating shaft 12. On the other hand, the limiting portion 133 arranged on the outer circle of the main body 131 can strengthen the local structure of the main body 131, thereby controlling the deformation direction of the main body 131. That is, through the arrangement of the limiting portion 133, the deformation degree of the main body 131 at the position of the limiting portion 133 is smaller, and the deformation degree of the main body 131 at the position of the opening 132 is larger. In this way, the deformation of the main body 131 can be effectively controlled, the durability of the main body 131 can be improved, and the stability and functionality of the damping member 13 on the rotating shaft 12 can be ensured.

[0077] In some preferred embodiments, as shown in Figure 3 and Figure 4 , the opening 132 and the limiting portion 133 are arranged on opposite sides of the main body 131. Specifically, as shown in Figure 5 , the opening 132, the center of the main body 131, and the limiting portion 133 are located on the same straight line, and the opening 132 and the limiting portion 133 are located on opposite sides of the center of the main body 131.

[0078] By arranging the opening 132 and the limiting portion 133 on opposite sides of the main body 131, it is ensured that the damping member 13 is uniformly stressed when working, avoiding the problem of uneven stress caused by asymmetric arrangement. Through such arrangement, the damping member 13 can more stably cooperate with the rotating shaft 12, thereby improving the overall performance and service life of the speed reducer 1. Since the opening 132 and the limiting portion 133 are arranged on opposite sides of the main body 131, the main body 131 can symmetrically deform with the connecting line between the opening 132 and the limiting portion 133 as the axis when deforming, which can effectively improve the stability and stress uniformity of the damping member 13, thereby improving the overall performance and service life of the speed reducer 1. Specifically, the damping member 13 can more uniformly distribute stress when working, reducing wear and failure caused by uneven stress, and further improving the reliability and durability of the speed reducer 1.

[0079] In some embodiments, the limiting portion 133 extends radially towards the main body 131 and in the direction of the opening 132.

[0080] The function of the limiting part 133 is to limit the rotation of the damping part 13. By extending in the radial direction, the contact area and stability of the limiting part 133 can be increased, thereby more effectively fixing the damping part 13. In this way, the stability problem of the limiting part 133 extending in the radial direction is solved, thereby improving the overall performance of the speed reducer 1. Moreover, the limiting part 133 extending in the radial direction has a longer moment of force, so that the limiting of the damping part 13 can be achieved by a smaller force, thereby reducing the difficulty of structural design.

[0081] In some preferred embodiments, as shown in Figure 3 The damping part 13 includes a plurality of damping parts 13 arranged along the axial direction of the rotating shaft 12.

[0082] By designing a plurality of damping parts 13 and arranging these damping parts 13 along the axial direction of the rotating shaft 12, the damping effect can be effectively increased, thereby improving the performance of the speed reducer 1. The axial arrangement of the plurality of damping parts 13 can more evenly distribute the friction force, ensuring that the speed reducer 1 is more stable and reliable when working. Moreover, the number of damping parts 13 can be adjusted according to actual application needs, thereby controlling the rotation damping and making it compatible with the wall-mounted television.

[0083] The material and size of the damping part 13 can be adjusted as needed. Specifically, different materials and sizes of the damping part 13 correspond to different friction forces. By replacing different materials and sizes of the damping part 13 or different materials and sizes of the damping part 13 in combination, different damping requirements can be achieved to adapt to different screens. In addition, in some embodiments in which the rotating shaft 12 is relatively long, when the rotating shaft 12 is loaded and rotated, the rotating shaft 12 may

[0084] Embodiment Three

[0085] This embodiment is a further improvement based on the first or second embodiment, which improves in that: as shown in Figure 3 and Figure 5 The limiting part 14 is provided with a limiting groove 141, which cooperates with the outer contour of the damping part 13.

[0086] The damping part 13 is located in the limiting groove 141 and is fixed by the limiting groove 141, and the limiting groove 141 and the damping part 13 are in interference fit.

[0087] By setting the limiting groove 141, the damping member 13 can be stably fixed in the limiting component 14. The cooperation between the limiting groove 141 and the outer contour of the damping member 13 ensures the positioning accuracy of the damping member 13. The interference fit further enhances the fixing effect and prevents loosening, thereby effectively solving the problems of stable fixation and effective cooperation of the damping member 13 in the speed reducer 1.

[0088] The limiting groove 141 can be implemented in various ways. For example, a notch matching the outer contour of the damping member 13 can be machined on the inner surface of the limiting component 14, or the limiting groove 141 can be directly formed on the limiting component 14 through a mold forming process. The interference fit between the limiting groove 141 and the damping member 13 can be achieved by adjusting the size of the notch and the size of the outer contour of the damping member 13, ensuring that they produce an appropriate amount of interference when assembled, thereby achieving a firm fixing effect. In addition, the material selection of the limiting groove 141 can also affect the cooperation effect. For example, using a material with a certain elasticity can further enhance the stability of the interference fit.

[0089] In some embodiments, as shown in Figure 2 and Figure 5 the limiting component 14 comprises:

[0090] a housing 142;

[0091] a limiting member 143 detachably fixed in the housing 142, and the limiting groove 141 is arranged on the limiting member 143.

[0092] In this embodiment, the limiting component 14 is divided into two independent accessories, i.e., the housing 142 and the limiting member 143, and the limiting groove 141 for cooperating with the damping member 13 is arranged on the limiting member 143. The housing 142 can protect the rotating shaft 12 and provide a basis for installing the limiting member 143.

[0093] The shell 142 and the limiting member 143 of the limiting component 14 can effectively fix the damping member 13, ensuring that the damping member 13 will not be loose or displaced when the speed reducer 1 is working, thereby improving the stability and reliability of the speed reducer 1. Moreover, since the limiting member 143 is detachably connected with the shell 142, a plurality of different types of limiting members 143 can be prepared, which differ in that the sizes of the limiting grooves 141 are different, so that they can be adapted to damping members 13 of different sizes, and the damping members 13 of different sizes have different friction forces when in contact with the rotating shaft 12; therefore, in actual application, when the rotating damping needs to be changed, the rotating damping can be changed by increasing the number of damping members 13, and another type of limiting member 143 can also be replaced, so that the size of the limiting groove 141 is changed to adapt to a damping member 13 of another size, and the purpose of changing the rotating damping can also be achieved.

[0094] In some embodiments, as shown in Figure 5 The shell 142 is provided with a mounting groove 144, which cooperates with the outer contour of the limiting member 143.

[0095] The limiting member 143 is detachably mounted in the mounting groove 144 and is fixed by the mounting groove 144, and the limiting member 143 is in interference fit with the mounting groove 144.

[0096] By providing the mounting groove 144 on the shell 142, the limiting member 143 can be conveniently mounted and detached, and the interference fit ensures the stability and reliability of the mounting, thereby improving the overall performance and service life of the speed reducer 1.

[0097] The mounting groove 144 can be implemented in various ways, for example, the mounting groove 144 can be directly formed on the shell 142 by machining, or the mounting groove 144 can be formed by casting, stamping or other processes. The outer contour of the limiting member 143 can be designed to match the shape of the mounting groove 144, for example, in the shape of a rectangle, a circle or other shapes, to ensure the effect of interference fit. The limiting member 143 can be made of metal materials or high-strength plastics to ensure its strength and durability.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them. Although the embodiments of the present application have been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the present application can still be modified or replaced by equivalents, and these modifications or replacements cannot make the modified technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A speed reducer characterized by , comprising: a reduction gear set, one end of which is used to be connected with a driving mechanism; a rotating shaft, connected with the other end of the reduction gear set; a damping member, sleeved on the rotating shaft, and abutting against the circumferential surface of the rotating shaft to generate a friction force; a limiting component, connected with the damping member to fix the damping member; when the driving mechanism drives the rotating shaft to rotate through the reduction gear set, the damping member can rotate relative to the rotating shaft.

2. The speed reducer according to claim 1, characterized by The damping member comprises: a main body, sleeved on the rotating shaft and in interference fit with the rotating shaft; an opening, provided on the main body; a limiting portion, provided on the outer circle of the main body, which can be fixed to limit the rotation of the main body.

3. The speed reducer according to claim 2, characterized by The opening and the limiting portion are oppositely provided on both sides of the main body.

4. The speed reducer according to claim 2, characterized by The limiting portion extends towards the radial direction of the main body and away from the opening.

5. The speed reducer of claim 1, wherein The damping member comprises a plurality of damping members arranged along the axial direction of the rotating shaft.

6. The speed reducer of claim 1, wherein The limiting component is provided with a limiting groove, which is matched with the outer contour of the damping member; the damping member is located in the limiting groove and is fixed by the limiting groove, and the limiting groove is in interference fit with the damping member.

7. The speed reducer according to claim 6, characterized by The limiting component comprises: a housing; a limiting member, detachably fixed in the housing, and the limiting groove is provided on the limiting member.

8. The speed reducer of claim 7, wherein The housing is provided with a mounting groove, which is matched with the outer contour of the limiting member; the limiting member is detachably mounted in the mounting groove and is fixed by the mounting groove, and the limiting member is in interference fit with the mounting groove.

9. A turnover mechanism, characterised in that comprising: a driving mechanism; the reduction gear set according to any one of claims 1-8, connected with the driving mechanism; a turnover support, connected with the rotating shaft of the reduction gear set, used to be connected with a screen.

10. A ceiling TV, characterized by comprising: a screen; the reduction gear set according to any one of claims 1-8.

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