Tensioning device and vehicle with same

Abstract

The utility model discloses a tensioning device and a vehicle with the tensioning device. The tensioning device comprises a tensioning arm assembly, a first sealing piece, a wheel assembly and a second sealing piece. The tensioning arm assembly comprises a first shell and a second shell which are connected with each other, and the first shell and the second shell are coaxially arranged. The first seal abuts between the first housing and the second housing. The assembly comprises a third shell and a tensioning wheel, the third shell is connected with the first shell, the tensioning wheel is arranged at one axial end of the third shell, and the central axis of the third shell is parallel to the central axis of the first shell. The second sealing piece abuts against the position between the third shell and the tensioning wheel. According to the tensioning device, the first sealing piece is arranged between the first shell and the second shell, and the second sealing piece is arranged between the third shell and the tensioning wheel, so that dynamic sealing of the tensioning device is achieved, the failure rate of the tensioning device is reduced, and the service life of the tensioning device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning devices, in particular to a tensioning device and a vehicle thereof. Background Art

[0002] The tensioner is the core component of the front-end gear train of the engine. Failure of the tensioner can cause problems such as high engine water temperature, no engine power, no generator power generation, and no air conditioning operation, thus affecting the operation of the vehicle. Among them, dust from the outside world entering the interior of the tensioner can easily cause wear of the tensioner, causing the tensioner to tilt. The tilt of the tensioner will cause the engine belt to have an angle with the groove wheel when it enters the groove wheel. When the angle between the engine belt and the groove wheel exceeds 0.7°, the front-end gear train of the engine will make abnormal noises or malfunction.

[0003] In the related art, dust-proof blocks are often used to prevent external dust and the like from entering the interior of the tensioner. However, the engine belt is in a continuous rotational motion, making it difficult for the tensioner to achieve dynamic sealing, resulting in a high failure rate of the tensioner. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a tensioning device, which realizes dynamic sealing of the tensioning device, reduces the failure rate of the tensioning device, and increases the service life of the tensioning device.

[0005] Another object of the present invention is to provide a vehicle using the tensioning device.

[0006] The tensioning device according to the first aspect of the utility model includes: a tensioning arm assembly, the tensioning arm assembly includes a first shell and a second shell connected to each other, the first shell and the second shell are coaxially arranged; a first seal, the first seal is stopped between the first shell and the second shell; a wheel assembly, the wheel assembly includes a third shell and a tensioning wheel, the third shell is connected to the first shell, the tensioning wheel is arranged at one axial end of the third shell, and the central axis of the third shell is parallel to the central axis of the first shell; a second seal, the second seal is stopped between the third shell and the tensioning wheel.

[0007] According to the tensioning device of the embodiment of the utility model, a first seal is provided between the first shell and the second shell to prevent dust and water mist from entering between the first shell and the second shell, and a second seal is provided between the third shell and the tensioning wheel to prevent dust and water mist from entering the tensioning wheel and causing wear to the tensioning wheel. In this way, dynamic sealing of the tensioning device is achieved, the failure rate of the tensioning device is reduced, and the service life of the tensioning device is increased.

[0008] According to some embodiments of the present utility model, the first shell includes a first shell segment and a second shell segment connected to each other, the cross-sectional area of ​​the first shell segment is smaller than the cross-sectional area of ​​the second shell segment; the second shell is formed with a mating groove, the first shell segment is located in the mating groove, and the first seal stops between the side wall of the mating groove and the first shell segment.

[0009] According to some embodiments of the present utility model, the first sealing member includes a first sealing segment, a second sealing segment and a third sealing segment connected in sequence, the second sealing segment extends radially along the first shell, the first sealing segment and the third sealing segment both extend in a direction toward the first shell, the end of the first sealing segment away from the second sealing segment stops at the bottom wall of the mating groove, and the third sealing segment stops at the side wall of the first shell segment.

[0010] According to some embodiments of the present utility model, the first sealing member also includes a fourth sealing segment, one end of the fourth sealing segment is connected to an end of the third sealing segment away from the second sealing segment, the other end of the fourth sealing segment extends along the radial direction of the first shell, and the side of the fourth sealing segment away from the second shell stops at the end face of the first shell segment.

[0011] According to some embodiments of the present invention, the thickness of the first sealing section is d, and d satisfies: 0.5mm≤d≤0.8mm.

[0012] According to some embodiments of the present invention, the length of the second sealing segment along the radial direction of the first shell is L, wherein L satisfies: 2.0 mm≤L≤2.6 mm.

[0013] According to some embodiments of the present invention, a side surface of the second seal adjacent to the tensioning wheel is recessed in a direction away from the tensioning wheel to form a groove, and a cross-sectional area of ​​the groove gradually decreases in a direction away from the tensioning wheel.

[0014] According to some embodiments of the present invention, the second sealing member includes a first connecting segment and a second connecting segment connected to each other, the first connecting segment and the second connecting segment jointly define the groove, and the angle between the first connecting segment and the second connecting segment is α, wherein α satisfies: 43°≤α≤45°.

[0015] According to some embodiments of the utility model, the wheel assembly also includes a rotating shaft and a bearing, the bearing is arranged between the rotating shaft and the tensioning wheel, one end of the rotating shaft is located in the third shell, a mounting groove is formed on the third shell, part of the tensioning wheel is located in the mounting groove, the second seal is arranged in the mounting groove, and the two ends of the second seal are respectively stopped against the tensioning wheel and the bottom wall of the mounting groove.

[0016] A vehicle according to an embodiment of the second aspect of the utility model comprises a tensioning device according to an embodiment of the first aspect of the utility model.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a cross-sectional view of a tensioning device according to an embodiment of the utility model;

[0020] Figure 2 is a partial schematic diagram of a first sealing member of a tensioning device according to an embodiment of the utility model;

[0021] Figure 3 It is a partial schematic diagram of the second sealing member of the tensioning device according to an embodiment of the utility model.

[0022] Reference numerals:

[0023] 100: tensioning device;

[0024] 1: tensioning arm assembly; 11: first housing; 111: first housing section; 112: second housing section; 12: second housing; 121: matching groove; 2: first seal; 21: first sealing section; 22: second sealing section; 23: third sealing section; 24: fourth sealing section; 3: wheel assembly; 31: third housing; 311: mounting groove; 32: tensioning wheel; 33: rotating shaft; 34: bearing; 4: second seal; 41: first connecting section; 42: second connecting section; 43: groove; 5: dust cover; 6: damping assembly. DETAILED DESCRIPTION

[0025] Reference below Figure 1-Figure 3 A tensioning device 100 according to an embodiment of the first aspect of the present invention is described.

[0026] like Figure 1-Figure 3As shown, the tensioning device 100 according to the first embodiment of the utility model comprises a tensioning arm assembly 1, a first seal 2, a wheel assembly 3 and a second seal 4. It should be noted that the application is described by taking the application of the tensioning device 100 to an engine gear train as an example, but it is not limited thereto.

[0027] Specifically, the tension arm assembly 1 includes a first housing 11 and a second housing 12 connected to each other, and the first housing 11 and the second housing 12 are coaxially arranged. The first seal 2 is stopped between the first housing 11 and the second housing 12. The wheel assembly 3 includes a third housing 31 and a tensioning wheel 32, the third housing 31 is connected to the first housing 11, and the tensioning wheel 32 is arranged at one axial end of the third housing 31, and the central axis of the third housing 31 is parallel to the central axis of the first housing 11. The second seal 4 is stopped between the third housing 31 and the tensioning wheel 32.

[0028] For example, in Figure 1 In the example, the first housing 11 and the third housing 31 are connected along the radial direction of the first housing 11 to increase the integrity of the tensioning device 100. The first housing 11 and the second housing 12 are suitable for being installed and positioned by fixing members to fix the entire tensioning device 100. The tensioning device 100 can be arranged according to different requirements in the engine gear train to achieve the best engine belt transmission arrangement and achieve the most optimized design.

[0029] The tensioning wheel 32 is suitable for fitting with the engine belt, and the tensioning wheel 32 will rotate with the transmission of the engine belt to provide tensioning force for the engine belt through the tensioning device 100, increase the running stability of the engine belt, make the engine belt transmission safer and smoother, and ensure that the engine gear train runs more efficiently and reliably.

[0030] The damping assembly 6 is suitable for being installed between the first shell 11 and the second shell 12. The damping assembly 6 slides relative to the inner walls of the first shell 11 and the second shell 12 to generate friction damping, and the friction damping is used to absorb the vibration of the belt from the engine. The first seal 2 is arranged between the first shell 11 and the second shell 12 to fill the gap between the first shell 11 and the second shell 12, to prevent dust and water mist from entering between the first shell 11 and the second shell 12, and to prevent the operation of the components between the first shell 11 and the second shell 12, such as the damping assembly 6, so as to improve the sealing between the first shell 11 and the second shell 12, reduce the failure rate of the tensioning device 100, improve the stability of the tensioning device 100, and extend the service life of the tensioning device 100.

[0031] Since the tensioning wheel 32 rotates relative to the third shell 31, there is a gap between the tensioning wheel 32 and the third shell 31. By providing a second seal 4 between the third shell 31 and the tensioning wheel 32, it is helpful to prevent dust, water mist, etc. from entering the interior of the tensioning wheel 32 and causing wear on the interior of the tensioning wheel 32, thereby achieving dynamic sealing of the tensioning wheel 32, further reducing the failure rate of the tensioning wheel 32, improving the operating stability of the tensioning device 100, and extending the service life of the tensioning device 100.

[0032] According to the tensioning device 100 of the embodiment of the utility model, a first seal 2 is provided between the first housing 11 and the second housing 12 to prevent dust and water mist from entering between the first housing 11 and the second housing 12, and a second seal 4 is provided between the third housing 31 and the tensioning wheel 32 to prevent dust and water mist from entering the tensioning wheel 32 and causing wear to the tensioning wheel 32. Thus, dynamic sealing of the tensioning device 100 is achieved, the failure rate of the tensioning device 100 is reduced, and the service life of the tensioning device 100 is increased.

[0033] According to some embodiments of the present invention, referring to Figure 1 The first housing 11 includes a first housing segment 111 and a second housing segment 112 connected to each other, and the cross-sectional area of ​​the first housing segment 111 is smaller than the cross-sectional area of ​​the second housing segment 112. The second housing 12 is formed with a matching groove 121, and the first housing segment 111 is located in the matching groove 121. The first seal 2 is stopped between the side wall of the matching groove 121 and the first housing segment 111. In other words, the outer wall of the first housing segment 111 and the side wall of the matching groove 121 are opposite to each other, so as to facilitate the alignment accuracy of the first housing 11 and the second housing 12, thereby improving the assembly efficiency of the tensioning device 100. Along the axial direction of the first housing 11, one side of the first seal 2 is stopped against the first housing segment 111, and the other side of the first seal 2 is stopped against the side wall of the matching groove 121, thereby ensuring that the first seal 2 can be fully sealed between the first housing 11 and the second housing 12, thereby improving the sealing performance of the tensioning device 100.

[0034] Further, refer to Figure 1 and Figure 2The first seal 2 includes a first seal section 21, a second seal section 22 and a third seal section 23 which are connected in sequence. The second seal section 22 extends in the radial direction of the first housing 11. Both the first seal section 21 and the third seal section 23 extend in the direction toward the first housing 11. The end of the first seal section 21 away from the second seal section 22 abuts against the bottom wall of the matching groove 121, and the third seal section 23 abuts against the side wall of the first housing section 111. Thus, the first seal section 21 increases the matching stability between the first seal 2 and the bottom of the matching groove 121, and the second seal section 22 increases the matching stability between the first seal 2 and the side wall of the first housing section 111, so that the second seal section 22 can stably seal the gap between the first housing 11 and the second housing 12 in the radial direction, and effectively prevent dust and water mist from entering between the first housing 11 and the second housing 12.

[0035] Furthermore, refer to Figure 1 and Figure 2 The first seal 2 further includes a fourth seal segment 24, one end of which is connected to an end of the third seal segment 23 away from the second seal segment 22, the other end of which extends along the radial direction of the first housing 11, and a side of the fourth seal segment 24 away from the second housing 12 abuts against an end surface of the first housing segment 111. Thus, the fourth seal segment 24 further increases the abutment area between the first seal 2 and the first housing 11, thereby further increasing the installation stability of the first seal 2 between the first housing 11 and the second housing 12, and further improving the sealing performance of the first seal 2.

[0036] According to some embodiments of the present invention, referring to Figure 2 , the thickness of the first sealing section 21 is d, and d satisfies: 0.5mm≤d≤0.8mm. When d<0.5mm, the thickness of the first sealing section 21 is small, and the structural strength of the first sealing section 21 is low, so that the effect of the first sealing section 21 and the bottom wall of the matching groove 121 stopping is poor, which will reduce the sealing performance of the first sealing member 2; when d>0.8mm, the thickness of the first sealing section 21 is large, and the length of the second sealing section 22 and the thickness of the third sealing section 23 will be reduced in the limited space between the first shell 11 and the second shell 12, thereby reducing the structural strength of the second sealing section 22 and the third sealing section 23, and further reducing the sealing stability of the first sealing member 2. Therefore, by setting the thickness of the first sealing section 21 to 0.5mm≤d≤0.8mm, the thickness design of the first sealing section 21 is more reasonable, and even in the limited space between the first shell 11 and the second shell 12, the length of the second sealing section 22 and the thickness of the third sealing section 23 are more reasonable, thereby effectively improving the structural strength of the first sealing member 2 and improving the sealing performance of the first sealing member 2.

[0037] Among them, refer to Figure 2, the length of the second sealing section 22 along the radial direction of the first shell 11 is L, where L satisfies: 2.0mm≤L≤2.6mm. When L<2.0mm, the length of the second sealing section 22 along the radial direction of the first shell 11 is small, and the length of the second sealing section 22 along the radial direction of the first shell 11 is much smaller than the length of the gap between the first shell 11 and the second shell 12, thereby reducing the sealing performance of the first seal 2; when L>2.6mm, the length of the second sealing section 22 along the radial direction of the first shell 11 is large, and the length of the second sealing section 22 along the radial direction of the first shell 11 is much larger than the distance between the first shell 11 and the second shell 12, which easily leads to excessive deformation of the second sealing section 22, thereby reducing the service life of the first seal 2. Therefore, by setting the length of the second sealing section 22 along the radial direction of the first shell 11 to 2.0mm≤L≤2.6mm, the size design of the second sealing section 22 is more reasonable, so that the first seal 2 can fully exert its sealing performance while avoiding excessive deformation of the second sealing section 22, thereby effectively extending the service life of the first seal 2.

[0038] According to some embodiments of the present invention, referring to Figure 1 and Figure 3 , the surface of one side of the second seal 4 adjacent to the tension wheel 32 is recessed in the direction away from the tension wheel 32 to form a groove 43, and the cross-sectional area of ​​the groove 43 gradually decreases in the direction away from the tension wheel 32. When dust and water mist pass through the groove 43, friction effect and fluid convergence effect are generated to achieve the sealing effect. At the same time, the structural strength of the side of the second seal 4 away from the tension wheel 32 is relatively large, which is conducive to increasing the installation stability of the second seal 4 between the third shell 31 and the tension wheel 32. The structural strength of the side of the second seal 4 adjacent to the tension wheel 32 is relatively small, so as to prevent the second seal 4 from affecting the rotation of the tension wheel 32. Therefore, while ensuring the sealing performance of the second seal 4, the influence of the second seal 4 on the tension wheel 32 is reduced.

[0039] Furthermore, if Figure 1 and Figure 3As shown, the second sealing member 4 includes a first connecting segment 41 and a second connecting segment 42 connected to each other, the first connecting segment 41 and the second connecting segment 42 jointly define a groove 43, and the angle between the first connecting segment 41 and the second connecting segment 42 is α, wherein α satisfies: 43°≤α≤45°. When α<43°, the angle between the first connecting segment 41 and the second connecting segment 42 is small, that is, the groove 43 formed is small, and thus the friction effect and fluid convergence effect of dust and water mist in the groove 43 are poor, and it is difficult to achieve the sealing effect; when α>45°, the angle between the first connecting segment 41 and the second connecting segment 42 is large, that is, the groove 43 formed is large, thereby causing a small pressure difference loss of dust and water mist, and thus increasing the risk of dust and water mist entering the tensioning wheel 32. Therefore, by setting the angle between the first connecting section 41 and the second connecting section 42 to 43°≤α≤45°, the design of the groove 43 is made more reasonable, and the friction effect and fluid convergence effect generated by the groove 43 are suitable for blocking dust and water mist, thereby improving the sealing performance of the second seal 4.

[0040] According to some embodiments of the present invention, referring to Figure 1 The wheel assembly 3 further includes a rotating shaft 33 and a bearing 34. The bearing 34 is disposed between the rotating shaft 33 and the tension wheel 32. One end of the rotating shaft 33 is located in the third housing 31. A mounting groove 311 is formed on the third housing 31. Part of the tension wheel 32 is located in the mounting groove 311. The second seal 4 is disposed in the mounting groove 311, and the two ends of the second seal 4 are respectively abutted against the bottom wall of the tension wheel 32 and the mounting groove 311. The rotating shaft 33 and the tension wheel 32 are coaxially disposed in the third housing 31. The rotating shaft 33 is supported by the bearing 34 to reduce the mechanical load friction coefficient when the power is transmitted between the rotating shaft and the tension wheel 32. At the same time, the bearing 34 transmits the power on the rotating shaft 33 to the tension wheel 32 to rotate the tension wheel 32.

[0041] The mounting groove 311 corresponds to the tension wheel 32, so as to prevent the third housing 31 from interfering with the rotation of the tension wheel 32. The second seal 4 abuts against the tension wheel 32 and the bottom wall of the mounting groove 311 to prevent dust and water mist from entering the tension wheel 32 from the gap between the tension wheel 32 and the third housing 31, thereby preventing the tension wheel 32 from being worn, reducing the failure rate of the tensioning device 100, and further improving the operating stability of the tensioning device 100 and extending the service life of the tensioning device 100.

[0042] Optionally, a dust cover 5 is provided at the end of the rotating drawer and the bearing 34 away from the third shell 31 to prevent dust, water mist, etc. from entering the bearing 34 and the rotating shaft 33, thereby improving the sealing of the end of the bearing 34 and the rotating shaft 33 away from the third shell 31 and further reducing the failure rate of the tensioning device 100.

[0043] The vehicle according to the embodiment of the second aspect of the utility model comprises the tensioning device 100 according to the embodiment of the first aspect of the utility model.

[0044] According to the vehicle of the embodiment of the utility model, by adopting the above-mentioned tensioning device 100, it is beneficial to accurately control the tensioning of the engine belt, make the engine belt transmission safer, smoother and more effective, and ensure that the engine gear train runs more effectively and reliably.

[0045] The tensioning device 100 and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail herein.

[0046] In the description of the present invention, it should be understood that the terms "center", "length", "thickness", "up", "down", "front", "back", "left", "right", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0049] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A tensioning device, characterized in that: include: A tension arm assembly, the tension arm assembly comprising a first shell and a second shell connected to each other, the first shell and the second shell being coaxially arranged; a first sealing member, the first sealing member being abutted between the first shell and the second shell; A wheel assembly, the wheel assembly comprising a third housing and a tensioning wheel, the third housing is connected to the first housing, the tensioning wheel is arranged at one axial end of the third housing, and the central axis of the third housing is parallel to the central axis of the first housing; A second sealing member is disposed between the third housing and the tensioning wheel.

2. The tensioning device according to claim 1, characterized in that: The first shell includes a first shell segment and a second shell segment connected to each other, and the cross-sectional area of ​​the first shell segment is smaller than the cross-sectional area of ​​the second shell segment; The second shell is formed with a matching groove, the first shell segment is located in the matching groove, and the first sealing member is abutted between the side wall of the matching groove and the first shell segment.

3. The tensioning device according to claim 2, characterized in that: The first sealing member includes a first sealing segment, a second sealing segment and a third sealing segment connected in sequence, the second sealing segment extends in the radial direction of the first shell, the first sealing segment and the third sealing segment both extend in a direction toward the first shell, the end of the first sealing segment away from the second sealing segment abuts against the bottom wall of the mating groove, and the third sealing segment abuts against the side wall of the first shell segment.

4. The tensioning device according to claim 3, characterized in that: The first sealing member also includes a fourth sealing segment, one end of the fourth sealing segment is connected to an end of the third sealing segment away from the second sealing segment, the other end of the fourth sealing segment extends along the radial direction of the first shell, and the side of the fourth sealing segment away from the second shell stops at the end surface of the first shell segment.

5. The tensioning device according to claim 3, characterized in that: The thickness of the first sealing section is d, and d satisfies: 0.5 mm≤d≤0.8 mm.

6. The tensioning device according to claim 3, characterized in that: The length of the second sealing section along the radial direction of the first shell is L, wherein L satisfies: 2.0 mm≤L≤2.6 mm.

7. The tensioning device according to claim 1, characterized in that: A surface of one side of the second sealing member adjacent to the tensioning wheel is recessed in a direction away from the tensioning wheel to form a groove, and a cross-sectional area of ​​the groove gradually decreases in a direction away from the tensioning wheel.

8. The tensioning device according to claim 7, characterized in that: The second sealing member includes a first connecting segment and a second connecting segment connected to each other, the first connecting segment and the second connecting segment jointly define the groove, and the angle between the first connecting segment and the second connecting segment is α, wherein α satisfies: 43°≤α≤45°.

9. The tensioning device according to any one of claims 1 to 8, characterized in that: The wheel assembly also includes a rotating shaft and a bearing, the bearing is arranged between the rotating shaft and the tensioning wheel, one end of the rotating shaft is located in the third shell, a mounting groove is formed on the third shell, part of the tensioning wheel is located in the mounting groove, the second seal is arranged in the mounting groove, and the two ends of the second seal are respectively stopped against the tensioning wheel and the bottom wall of the mounting groove.

10. A vehicle, characterized in that: Comprising a tensioning device according to any one of claims 1-9.

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