Tensioning device, sunshade curtain assembly, glass assembly and vehicle

Abstract

The utility model relates to a tensioning device, a sunshade curtain assembly, a glass assembly and a vehicle. The tensioning device comprises a mounting seat, and the mounting seat is provided with a mounting part; the transmission wheel is rotatably arranged on the mounting seat, and the transmission wheel is used for being wound with a transmission part, so that the transmission wheel is in transmission fit with the transmission part; and the pressing mechanism is movably arranged on the mounting part, and the pressing mechanism is used for elastically pressing the transmission part. By means of the elastic acting force applied to the transmission part by the pressing mechanism, the pressing mechanism can press the transmission part all the time, and then it is guaranteed that the transmission part is kept in a tightened state all the time.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of synchronous belt tensioning, in particular to a tensioning device, a sunshade curtain assembly, a glass assembly and a vehicle. BACKGROUND

[0002] With the development of the automobile industry, new energy vehicles with large-size sunroofs are increasingly favored by consumers. However, while the large-size sunroof brings more sufficient light environment in the vehicle and better vision, it also causes the temperature in the vehicle to rise due to direct sunlight, affecting the comfort of the driver and passenger, and causing the accelerated aging of electrical components, fabrics and other objects in the vehicle. Therefore, installing an electric sunshade curtain for the sunroof is an effective solution.

[0003] An electric sunshade curtain is a sunshade system driven by a motor, mainly used for sunshade and light control of the sunroof. When the electric sunshade curtain is working, the motor drives the synchronous wheel to rotate, the synchronous wheel drives the synchronous belt to rotate, and the synchronous belt drives the sunshade cloth to expand or retract, realizing the sunshade or exposure of the sunroof glass. However, after long-term use, the synchronous belt not only tends to sag due to its own weight, but also the synchronous wheel, sunshade cloth and other components will exert force on the synchronous belt, causing the synchronous belt to stretch and deform, and then sag. The sagging synchronous belt is easy to jump off the synchronous wheel, affecting the transmission reliability, and also affecting the stability of the sunshade cloth expansion and retraction movement, easily producing noise, affecting the use performance and experience of the electric sunshade curtain. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a tensioning device, a sunshade curtain assembly, a glass assembly and a vehicle to solve the problems of poor transmission reliability, poor stability of sunshade cloth expansion and retraction movement, and poor use performance and experience.

[0005] In a first aspect, the present application provides a tensioning device, comprising:

[0006] a mounting seat provided with a mounting portion;

[0007] a transmission wheel rotatably mounted on the mounting seat, the transmission wheel being used to be wound with a transmission member to make the transmission wheel and the transmission member transmissionally cooperate; and

[0008] a pressing mechanism movably arranged on the mounting portion, the pressing mechanism being used to elastically press the transmission member.

[0009] The tensioning device in this solution is applied to the vehicle's glass assembly, working in conjunction with the power source, transmission components, and sunshade. It drives the sunshade to unfold and block the panoramic glass, fulfilling sun shading needs, or to retract and reveal the panoramic glass, providing better interior lighting and a wider field of vision, thus enhancing the passenger experience. During installation, the transmission components are assembled with the transmission wheels. The power source drives the transmission wheels to rotate, which in turn drives the transmission components to rotate, enabling the transmission components to unfold or retract the sunshade. Because a clamping mechanism is installed on the mounting base, it elastically clamps the transmission components, ensuring they remain taut at all times. Even if the transmission components deform and sag due to their own weight or external forces after prolonged use, the clamping mechanism always restores them to a taut state. This ensures reliable assembly of the transmission components and transmission wheels, guaranteeing reliable transmission between them. It also ensures the smoothness of the sunshade's unfolding or retracting movement when it moves synchronously with the transmission components, effectively preventing noise and improving the performance and user experience of the sunshade.

[0010] The technical solution of this application will be further described below:

[0011] In one embodiment, the clamping mechanism includes a clamping member, an elastic member, and a constraint assembly. The clamping member is movably mounted on the mounting portion. The elastic member is mounted on the mounting portion, with one end of the elastic member abutting against the mounting portion. The constraint assembly is connected to the clamping member, and the constraint assembly abuts against the other end of the elastic member, so that the elastic member is kept in a compressed state, allowing the clamping member to elastically clamp against the transmission member.

[0012] In one embodiment, the mounting portion includes a mounting through hole having opposing first and second ports. The clamping member includes a connected mounting post and a clamping block. The mounting post passes through the mounting through hole and is telescopically movable along the centerline of the mounting through hole. The clamping block extends from the first port to clamp the transmission member. One end of the mounting post away from the clamping block extends from the second port to connect with the constraint assembly. The elastic member is disposed within the mounting through hole.

[0013] In one embodiment, a support piece is provided on the sidewall of the first hole port facing the center of the mounting through hole, and the end of the elastic member away from the constraint component abuts against the support piece.

[0014] In one embodiment, the support piece defines the first hole as a limiting hole, which restricts the mounting post from rotating circumferentially within the mounting through hole. The shape and size of the cross-section of the mounting post are respectively adapted to the shape and size of the cross-section of the limiting hole.

[0015] In one of the embodiments, the constraint assembly includes a fixing ring, which is sleeved on the mounting column away from the pressing block, and which is in abutment with the other end of the elastic member.

[0016] In one of the embodiments, the constraint assembly further includes a stop ring, which is arranged on the mounting column and in abutment with the fixing ring, and which is arranged further away from the elastic member than the fixing ring.

[0017] In one of the embodiments, the outer peripheral wall of the mounting column away from the pressing block is provided with a clamping groove, and the stop ring is clamped in the clamping groove.

[0018] In one of the embodiments, the pressing block is provided with an arc-shaped protrusion, which is used for sliding abutment with the transmission member.

[0019] In one of the embodiments, the arc-shaped protrusion is in linear contact with the transmission member.

[0020] In one of the embodiments, the elastic member is a spring, which is sleeved on the outside of the mounting column, the inner peripheral wall of the spring is in clearance fit with the outer peripheral wall of the mounting column, and the outer peripheral wall of the spring is in clearance fit with the hole wall of the mounting through hole.

[0021] In one of the embodiments, the transmission wheel includes a synchronous pulley, and the transmission member includes a synchronous belt, and the wheel peripheral surface of the synchronous pulley is provided with a tooth groove, which is used for meshing with the teeth on the inner side surface of the synchronous belt.

[0022] In one of the embodiments, the mounting seat is provided with a shaft hole, the transmission wheel has a wheel shaft, and the wheel shaft is rotatably inserted into the shaft hole.

[0023] In one of the embodiments, the arc-shaped protrusion is recessed to form a limiting groove, which is used for pressing fit with the transmission member.

[0024] The second aspect of the present application further proposes a sunshade curtain assembly, which includes:

[0025] a sunshade curtain connected with a transmission member;

[0026] a power source; and

[0027] a tensioning device as described above, which is arranged in cooperation with the transmission member, the transmission member is sleeved on the transmission wheel, and the power source is in transmission connection with the transmission wheel.

[0028] The third aspect of the present application further proposes a glass assembly, which includes:

[0029] Glass; and

[0030] As described above, the sunshade assembly is located on the side of the glass facing the interior of the vehicle, and the sunshade can either cover or reveal the glass.

[0031] A fourth aspect of this application also provides a vehicle comprising:

[0032] Body; and

[0033] The glass assembly described above is mounted on the vehicle body. Attached Figure Description

[0034] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the assembly of the tensioning device and transmission component according to an embodiment of this application.

[0037] Figure 2 for Figure 1 A schematic diagram of the explosion structure.

[0038] Figure 3 for Figure 1 A top-view structural diagram.

[0039] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure at point AA.

[0040] Figure 5 This is a schematic diagram of the installation structure of the tensioning device in one embodiment.

[0041] Explanation of reference numerals in the attached figures:

[0042] 100, tensioning device; 10, mounting seat; 11, mounting through hole; 111, first hole port; 112, second hole port; 12, shaft hole; 20, transmission wheel; 21, wheel shaft; 30, pressing mechanism; 31, pressing piece; 311, mounting column; 311a, clamping groove; 312, pressing block; 312a, arc convex part; 312b, limiting groove; 32, elastic piece; 33, constraint assembly; 331, fixed ring; 332, stop ring; 34, support sheet; 200, transmission piece. DETAILED DESCRIPTION

[0043] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of ways other than those described herein, and the skilled person can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0046] In the present application, unless specifically defined otherwise and limited, if there are terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the present application, unless specifically defined otherwise and limited, if there are terms "mount", "connect", "connect", "fix", and the like, these terms should be interpreted in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] It should be noted that if an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are for illustrative purposes only and are not the only embodiment.

[0049] The present application provides a vehicle, which can be any type of mature vehicle in the prior art, such as a car, an off-road vehicle, an MPV, etc., which can be a gasoline car, a pure electric car, a gasoline-electric hybrid car, etc., which can be flexibly selected according to actual needs.

[0050] Among them, the vehicle at least includes a vehicle body and a glass assembly, and the glass assembly is installed on the vehicle body. The glass assembly can be any one of a skyroof glass assembly, a front windshield glass assembly, a rear windshield glass assembly, a side window glass assembly, etc.

[0051] For example, the glass assembly in the present application is specifically a skyroof glass assembly. The skyroof glass assembly refers to the complete assembly of the automobile skyroof, including glass, sunshade curtain assembly, controller assembly and motor assembly, etc. The main function of the skyroof glass assembly is to provide lighting and decoration effect in the vehicle, and to adjust light and temperature through the sunshade curtain and the controller.

[0052] Specific to one embodiment of the present application, when the glass assembly is a sunroof glass assembly, the glass refers to the sunroof glass. At this time, the sunroof glass assembly includes the sunroof glass and a sunshade curtain assembly, and the sunshade curtain assembly includes a sunshade curtain, a power source and the tensioning device 100.

[0053] The sunshade curtain is arranged on the side of the sunroof glass facing the vehicle interior, that is, the sunshade curtain is arranged in the vehicle interior, so that the sunshade curtain is protected by the outer side of the sunroof glass, and it is also more convenient to operate, clean, etc.

[0054] The sunshade curtain can shield or expose the sunroof glass, and the sunshade curtain is connected with a transmission member 200; the tensioning device 100 is arranged in cooperation with the transmission member 200, the transmission member 200 is wound around the transmission wheel 20, and the power source is in transmission connection with the transmission wheel 20.

[0055] For example, when the sunshade curtain is exposed, the power source drives the transmission wheel 20 to rotate clockwise, the transmission wheel 20 drives the transmission member 200 and the sunshade curtain to move in the direction of opening the sunroof glass, but at this time the part of the transmission member 200 above the transmission wheel 20 will be loose; on the contrary, when the sunshade curtain is closed, the power source drives the transmission wheel 20 to rotate counterclockwise, the transmission wheel 20 drives the transmission member 200 and the sunshade curtain to move in the direction of closing the sunroof glass, but at this time the part of the transmission member 200 below the transmission wheel 20 will be loose. The above phenomenon that the transmission member 200 is loose is commonly known as the loose edge phenomenon, and if it is not intervened, the transmission member 200 is prone to jump off the transmission wheel 20 and other problems. In view of this, the present application adopts the tensioning device 100 installed near the transmission member 200, which can intervene in the relaxation of the transmission member 200, thereby effectively preventing the jump-off and other problems from occurring.

[0056] Optionally, the power source can be, but is not limited to, a motor, a combination of a motor and a speed reducer, etc.

[0057] Referring to Figure 1 , Figure 2 and Figure 5 , a tensioning device 100 according to one embodiment of the present application includes a mounting seat 10, a transmission wheel 20 and a pressing mechanism 30.

[0058] The mounting seat 10 is a bearing body for mounting the integrated transmission wheel 20 and the pressing mechanism 30. In actual installation, the mounting seat 10 can be fixed to the vehicle body, the edge of the glass, etc.

[0059] The mounting method of the mounting seat 10 can be, but is not limited to, any one of screwing, clamping, bonding, welding, etc., and can be flexibly selected according to actual needs.

[0060] Please continue to refer to Figures 3 to 5The mounting base 10 is provided with a mounting portion; the transmission wheel 20 is rotatably mounted on the mounting base 10, and the transmission wheel 20 is used to be wound with the transmission member 200 to make the transmission wheel 20 transmissionally cooperate with the transmission member 200; and the pressing mechanism 30 is movably arranged on the mounting portion, and the pressing mechanism 30 is used to be elastically pressed with the transmission member 200.

[0061] Specifically, the pressing mechanism 30 comprises a pressing member 31, an elastic member 32 and a constraint assembly 33. The pressing member 31 is movably mounted on the mounting portion, the elastic member 32 is mounted on the mounting portion, and one end of the elastic member 32 abuts against the mounting portion. The constraint assembly 33 is connected with the pressing member 31, and the constraint assembly 33 abuts against the other end of the elastic member 32, so that the elastic member 32 is kept in a compressed state, and the pressing member 31 can be elastically pressed with the transmission member 200.

[0062] For example, the mounting base 10 is provided with an axle hole 12, and the transmission wheel 20 has an axle 21 which is rotatably inserted into the axle hole 12. Thus, the axle 21 is inserted into the axle hole 12 to realize the mounting of the transmission wheel 20 on the mounting base 10 and the free rotation of the transmission wheel 20, and the mounting mode of the transmission wheel 20 is simple, which is helpful to improve the mounting efficiency and reduce the difficulty of later maintenance.

[0063] In summary, the implementation of the technical scheme of the embodiment will obtain the following beneficial effects: the tensioning device 100 of the present scheme is applied to the sunshade curtain assembly of the glass assembly of the vehicle, is used to assemble and cooperate with the power source, the transmission member 200 and the sunshade curtain, realizes the driving of the sunshade curtain to be unfolded to form a shield for the sky dome glass, meets the sunshade need, or drives the sunshade curtain to be recycled to expose the sky dome glass, obtains a better light environment in the vehicle and a more open field of view, and improves the riding experience.

[0064] During the installation and use, the transmission member 200 is assembled with the transmission wheel 20, the power source drives the transmission wheel 20 to rotate, and then the transmission member 200 can be driven to rotate, the transmission member 200 drives the sunshade curtain to be unfolded or recycled, the movable pressing member 31 is mounted on the mounting portion of the mounting base 10, and the matched elastic member 32 and constraint assembly 33 are simultaneously mounted, so that the elastic member 32 is kept in a compressed state after being mounted, when the pressing member 31 is mounted with the transmission member 200, the elastic force of the elastic member 32 is applied to the pressing member 31, so that the pressing member 31 can always be pressed to the transmission member 200, and then the transmission member 200 is always kept in a tensioned state, even if the transmission member 200 is deformed and relaxed due to the self weight or external force after a long time of use, the pressing member 31 can always make the transmission member 200 return and keep in a tensioned state, that is, the reliable assembly of the transmission member 200 and the transmission wheel 20 is ensured, the reliability of the transmission of the two is ensured, and the stability of the unfolding or recycling movement of the sunshade curtain when the sunshade curtain moves synchronously with the transmission member 200 is ensured, the noise is effectively prevented, and the use performance and experience of the sunshade curtain are improved.

[0065] Please continue to refer to Figure 4 For example, in an optional embodiment, the mounting portion comprises a mounting through hole 11 having opposite first and second hole ports 111 and 112, the pressing member 31 comprises a mounting column 311 and a pressing block 312 connected with each other, the mounting column 311 is arranged to be telescopically movable in the hole center line direction of the mounting through hole 11, the pressing block 312 extends from the first hole port 111 to press against the transmission member 200, the end of the mounting column 311 away from the pressing block 312 extends from the second hole port 112 to be connected with the constraint assembly 33, and the elastic member 32 is arranged in the mounting through hole 11.

[0066] The pressing block 312 is specifically arranged at one end of the mounting column 311 in the length direction, and the pressing block 312 can be integrally formed with the mounting column 311 or can be detachably assembled. In this application, the pressing block 312 and the mounting column 311 are preferably integrally formed to obtain higher connection strength and structural performance.

[0067] During installation, the end of the mounting column 311 away from the pressing block 312 is inserted into the mounting through hole 11 from the first hole port 111, then the elastic member 32 is arranged in the mounting through hole 11 from the second hole port 112, and then the constraint assembly 33 is arranged on the end of the mounting column 311 extending into the second hole port 112 and abuts against the elastic member 32, so that the elastic member 32 is in a compressed state. At this time, the elastic member 32 has the stretching potential energy to restore the deformation, thereby generating an elastic downward pulling force on the pressing member 31, so that the pressing member 31 can be effectively and elastically pressed on the outside of the upper edge belt of the transmission member 200, thereby tensioning the transmission member 200 and keeping the transmission member 200 in a taut state.

[0068] Please continue to refer to Figure 2 and Figure 4 On the basis of the above embodiment, the side wall of the first hole port 111 is convexly provided with a support piece 34 toward the hole center direction of the mounting through hole 11, and the end of the elastic member 32 away from the constraint assembly 33 abuts against the support piece 34. Through the arrangement of the support piece 34, the support piece 34 can abut against and support the end of the elastic member 32 away from the constraint assembly 33, so that the support piece 34 and the constraint assembly 33 cooperate to abut against the elastic member 32, so that the elastic member 32 is in and remains in a compressed state. Since the constraint assembly 33 is fixed on the mounting column 311, the elastic member 32 can apply a downward elastic pulling force to the pressing block 312, so that the pressing member 31 can continuously and stably press the outside of the upper edge belt of the transmission member 200.

[0069] Further, the support sheet 34 defines the first hole port 111 as a limiting hole port for limiting the circumferential rotation of the mounting column 311 in the mounting through hole 11, the mounting column 311 and the limiting hole port are respectively matched in shape and size of cross section. The circumferential rotation of the mounting column 311 in the mounting through hole 11 is prevented, and the relative rotation friction between the pressing block 312 and the transmission member 200 is avoided, that is, the moving stability of the transmission member 200 is affected, and at the same time, the wear of the transmission member 200 is accelerated and increased.

[0070] For example, the cross sections of the limiting hole port and the mounting column 311 are both cross-shaped structures. In other embodiments, the cross sections of the two can also adopt the shape structures of any non-circular hole such as an ellipse, a rhombus, etc.

[0071] In work, the transmission member 200 rotates under the drive of the transmission wheel 20, the transmission member 200 contacts and slides relative to the pressing block 312, at this time, the pressing block 312 generates friction and wear to the transmission member 200. In order to reduce the degree of wear, the pressing block 312 is provided with an arc-shaped convex part 312a for sliding abutment with the transmission member 200.

[0072] Further, the arc-shaped convex part 312a and the transmission member 200 are in line contact. Compared with surface contact, the arc-shaped convex part 312a and the transmission member 200 adopt line contact, the contact area is smaller, the friction resistance is smaller, which helps to improve the moving stability of the transmission member 200, reduce the load of the motor, and significantly reduce the wear of the pressing block 312 to the synchronous transmission member 200.

[0073] Further, the part where the arc-shaped convex part 312a contacts the transmission member 200 can also be coated with lubricating oil or other wear-reducing medium.

[0074] Please continue to refer to Figure 2 and Figure 4 , in order to improve the moving stability of the transmission member 200 and avoid the risk of the transmission member 200 jumping off the transmission wheel 20 due to vibration, the arc-shaped convex part 312a is concave to form a limiting groove 312b for pressing fit with the transmission member 200. On the one hand, the groove bottom wall of the limiting groove 312b presses the transmission member 200, forming the effect of tensioning the transmission member 200; on the other hand, the transmission member 200 slides in the limiting groove 312b, the relative two side walls of the limiting groove 312b limit the side swing of the transmission member 200, realizing the limiting of the transmission member 200 along the Y-axis direction.

[0075] The Y-axis direction please refer to Figure 1 and Figure 4 .

[0076] Please continue to refer to Figure 2 , Figure 4 andFigure 5 In addition, based on any of the above embodiments, the constraint assembly 33 comprises a fixing ring 331 sleeved on the mounting column 311 away from the pressing block 312, and the fixing ring 331 abuts against the other end of the elastic member 32. It should be noted that the other end of the elastic member 32 is the end of the elastic member 32 away from the mounting portion.

[0077] By mounting and fixing the fixing ring 331 on the mounting column 311, the fixing ring 331 abuts against the end of the elastic member 32, so that the elastic member 32 can be in a mounted and compressed state.

[0078] Further, the constraint assembly 33 further comprises a stop ring 332, which is arranged on the mounting column 311 and abuts against the fixing ring 331, and the stop ring 332 is arranged farther away from the elastic member 32 than the fixing ring 331. The stop ring 332 abuts against the fixing ring 331, thereby forming support and reinforcement for the fixing ring 331, further improving the installation reliability of the fixing ring 331.

[0079] Still further, the outer peripheral wall of the end of the mounting column 311 away from the pressing block 312 is provided with a clamping groove 311a, and the stop ring 332 is clamped in the clamping groove 311a. Clamping the stop ring 332 in the clamping groove 311a can improve the installation firmness of the stop ring 332, prevent the fixing ring 331 from being displaced and loosened together with the stop ring 332 when subjected to the elastic pushing force of the elastic member 32, reduce the compression amount of the elastic member 32, and further affect the pressing effect of the pressing block 312 on the transmission member 200.

[0080] For example, in an alternative embodiment, the elastic member 32 is a spring, which is sleeved on the outside of the mounting column 311, the inner peripheral wall of the spring is in clearance fit with the outer peripheral wall of the mounting column 311, and the outer peripheral wall of the spring is in clearance fit with the hole wall of the mounting through hole 11. In this way, the outer peripheral wall of the mounting column 311 and the hole wall of the mounting through hole 11 limit and guide the shape and expansion deformation of the spring, so that the spring can only produce expansion deformation along its axial direction, thereby ensuring that the elastic pulling force of the pressing block 312 is large enough to prevent the spring from being twisted and affecting the tensioning effectiveness of the pressing block 312 on the transmission member 200.

[0081] In the present application, the transmission wheel 20 comprises a synchronous pulley, and the transmission member 200 comprises a synchronous belt. The peripheral surface of the synchronous pulley is provided with a tooth groove for engaging with the teeth on the inner side surface of the synchronous belt. It can be understood that the synchronous pulley and the synchronous belt are engaged and driven by the teeth and the tooth groove, which can effectively prevent slipping and ensure stable transmission.

[0082] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0083] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A tensioning device, characterized in that The application relates to a sunshade curtain transmission device. The device comprises a mounting base provided with a mounting portion; a transmission wheel rotatably mounted on the mounting base, the transmission wheel being used to be wound with a transmission member so as to be in transmission cooperation with the transmission member; and a pressing mechanism movably arranged on the mounting portion, the pressing mechanism being used to be elastically pressed with the transmission member. The pressing mechanism comprises a pressing member movably mounted on the mounting portion, an elastic member mounted on the mounting portion and abutting against one end of the mounting portion, and a constraint assembly connected with the pressing member and abutting against the other end of the elastic member, so that the elastic member is kept in a compressed state and the pressing member can be elastically pressed with the transmission member. The mounting portion comprises a mounting through hole having opposite first and second hole ports, the pressing member comprises a mounting column and a pressing block connected with each other, the mounting column is arranged in the mounting through hole and can be telescopically moved along the hole center line direction of the mounting through hole, the pressing block extends from the first hole port to be pressed with the transmission member, one end of the mounting column away from the pressing block extends from the second hole port to be connected with the constraint assembly, and the elastic member is arranged in the mounting through hole.

2. The tensioning device of claim 1, wherein, A supporting piece is protruded from the side wall of the first hole port towards the hole center direction of the mounting through hole, and one end of the elastic member away from the constraint assembly abuts against the supporting piece.

3. A tensioning device according to claim 2, characterized in that The supporting piece defines a limiting hole port for limiting the circumferential rotation of the mounting column in the mounting through hole, and the shape and size of the cross section of the mounting column are matched with the shape and size of the cross section of the limiting hole port.

4. A tensioning device according to claim 3, characterized in that The constraint assembly comprises a fixing ring sleeved on one end of the mounting column away from the pressing block and abutting against the other end of the elastic member.

5. A tensioning device according to claim 4, characterized in that The constraint assembly further comprises a stop ring mounted on the mounting column and abutting against the fixing ring, and the stop ring is arranged further away from the elastic member than the fixing ring.

6. The tensioning device of claim 4, wherein, A clamping groove is formed in the peripheral wall of one end of the mounting column away from the pressing block, and the stop ring is clamped in the clamping groove.

7. A tensioning device according to claim 6, characterized in that The pressing block is provided with an arc-shaped protruding part used to slide against the transmission member.

8. A tensioning device according to claim 7, characterized in that The arc-shaped protruding part is in linear contact cooperation with the transmission member.

9. The tensioning device of claim 3, wherein, The arc-shaped protruding part is concave to form a limiting groove used to be pressed with the transmission member.

10. A tensioning device according to claim 9, characterized in that The elastic member is a spring sleeved on the outside of the mounting column, the inner peripheral wall of the spring is gap-fitted with the outer peripheral wall of the mounting column, and the outer peripheral wall of the spring is gap-fitted with the hole wall of the mounting through hole.

11. The tensioning device of claim 9, wherein, The transmission wheel comprises a synchronous pulley, the transmission member comprises a synchronous belt, and the wheel peripheral surface of the synchronous pulley is provided with a tooth groove used to be engaged with the teeth on the inner side surface of the synchronous belt.

12. The tensioning device of claim 3, wherein, The mounting base is provided with a shaft hole, and the transmission wheel has a wheel shaft rotatably inserted into the shaft hole.

13. The tensioning device of claim 1, wherein, The application relates to a sunshade curtain transmission device.

14. The tensioning device of claim 1, wherein, The device comprises a mounting base provided with a mounting portion; a transmission wheel rotatably mounted on the mounting base, the transmission wheel being used to be wound with a transmission member so as to be in transmission cooperation with the transmission member; and a pressing mechanism movably arranged on the mounting portion, the pressing mechanism being used to be elastically pressed with the transmission member.

15. A shade assembly comprising: The pressing mechanism comprises a pressing member movably mounted on the mounting portion, an elastic member mounted on the mounting portion and abutting against one end of the mounting portion, and a constraint assembly connected with the pressing member and abutting against the other end of the elastic member, so that the elastic member is kept in a compressed state and the pressing member can be elastically pressed with the transmission member. The mounting portion comprises a mounting through hole having opposite first and second hole ports, the pressing member comprises a mounting column and a pressing block connected with each other, the mounting column is arranged in the mounting through hole and can be telescopically moved along the hole center line direction of the mounting through hole, the pressing block extends from the first hole port to be pressed with the transmission member, one end of the mounting column away from the pressing block extends from the second hole port to be connected with the constraint assembly, and the elastic member is arranged in the mounting through hole. A supporting piece is protruded from the side wall of the first hole port towards the hole center direction of the mounting through hole, and one end of the elastic member away from the constraint assembly abuts against the supporting piece. The supporting piece defines a limiting hole port for limiting the circumferential rotation of the mounting column in the mounting through hole, and the shape and size of the cross section of the mounting column are matched with the shape and size of the cross section of the limiting hole port. The constraint assembly comprises a fixing ring sleeved on one end of the mounting column away from the pressing block and abutting against the other end of the elastic member. The constraint assembly further comprises a stop ring mounted on the mounting column and abutting against the fixing ring, and the stop ring is arranged further away from the elastic member than the fixing ring. A clamping groove is formed in the peripheral wall of one end of the mounting column away from the pressing block, and the stop ring is clamped in the clamping groove. The pressing block is provided with an arc-shaped protruding part used to slide against the transmission member. The arc-shaped protruding part is in linear contact cooperation with the transmission member. The arc-shaped protruding part is concave to form a limiting groove used to be pressed with the transmission member. The elastic member is a spring sleeved on the outside of the mounting column, the inner peripheral wall of the spring is gap-fitted with the outer peripheral wall of the mounting column, and the outer peripheral wall of the spring is gap-fitted with the hole wall of the mounting through hole. The transmission wheel comprises a synchronous pulley, the transmission member comprises a synchronous belt, and the wheel peripheral surface of the synchronous pulley is provided with a tooth groove used to be engaged with the teeth on the inner side surface of the synchronous belt. The mounting base is provided with a shaft hole, and the transmission wheel has a wheel shaft rotatably inserted into the shaft hole. The tensioning device as claimed in any one of claims 1 to 14, wherein the tensioning device is arranged in cooperation with the transmission member, the transmission member being arranged around the transmission wheel, and the power source being in driving connection with the transmission wheel.

16. A glass assembly, characterized by, Comprising: a glass; and The sunshade assembly as claimed in claim 15, wherein the sunshade is arranged on a side of the glass facing into the vehicle interior, the sunshade being capable of obscuring or revealing the glass.

17. A vehicle characterized by comprising: Comprising: a vehicle body; and The glass assembly as claimed in claim 16, wherein the glass assembly is mounted to the vehicle body.

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