Tension adjusting structure for flexible rope of sunshade curtain

Abstract

The utility model discloses a sunshade curtain flexible cable tension adjusting structure which comprises a flexible cable (1), a fixed pulley (3) and a retracting and releasing operation mechanism (9), the fixed end of the flexible cable is connected with a winding drum of sunshade curtain cloth (8), the free end of the flexible cable bypasses the fixed pulley (3) and then is connected with the retracting and releasing operation mechanism, the retracting and releasing operation mechanism is provided with a telescopic device, and the telescopic device is connected with the fixed pulley (3). The free end of the flexible cable is connected with the retracting and releasing operation mechanism through the telescopic device. The telescopic device comprises a compression spring (5), a limiting piece (6), an adjusting rod (7) and a support (10), the compression spring and the limiting piece are placed in a containing groove in the support, the free end of the flexible cable stretches into the containing groove and penetrates through the compression spring to be connected with the limiting piece, the adjusting rod is installed on the support in a telescopic mode, the adjusting rod and the compression spring are coaxially installed, and the limiting piece is connected with the adjusting rod. The side, away from the flexible cable, of the limiting piece is connected with the end of the adjusting rod. According to the utility model, the lifting motion of the sunshade curtain can be operated comfortably and smoothly.

Description

Technical Field

[0001] The utility model relates to a sunshade curtain for a rail vehicle, in particular to a sunshade curtain flexible cable tensioning force regulating structure. Background Art

[0002] Vehicle sunshades refer to devices used to effectively block sunlight from the front and side windshields of vehicles. At present, most rail vehicle sunshades use flexible cables to achieve the lifting and lowering of the sunshades and the ability to stop as soon as they are pulled. The working principle of the sunshade to stop as soon as it is pulled is to rely on the friction between the flexible cable and the fixed pulley to overcome the gravity of the sunshade, that is, when the friction between the flexible cable and the fixed pulley is greater than the gravity of the sunshade, the sunshade can stop as soon as it is pulled. Obviously, the magnitude of the friction is closely related to the tension of the flexible cable itself, that is, the greater the tension, the greater the friction, and the smaller the tension, the smaller the friction.

[0003] Traditional sunshades do not have a flexible cable tension adjustment structure. In actual use, the sunshade may get stuck or slip when raised or lowered due to excessive or insufficient tension, making it impossible for the sunshade to work properly. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sunshade cable tensioning force adjustment structure which can adjust the cable tensioning force on the outside of the sunshade after the sunshade is installed, in view of the shortcomings of the existing sunshade that the cable tensioning force cannot be adjusted and is prone to jamming or slipping during lifting and lowering.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A sunshade curtain cable tensioning force adjustment structure comprises a cable, a fixed pulley and a retractable operating mechanism, wherein the fixed end of the cable is connected to a reel of a sunshade curtain fabric, and the free end is connected to the retractable operating mechanism after passing around the fixed pulley. A telescopic device is arranged on the retractable operating mechanism, and the free end of the cable is connected to the retractable operating mechanism via the telescopic device.

[0007] The utility model provides a telescopic device on the retractable operating mechanism, and the free end of the flexible rope is connected to the retractable operating mechanism via the telescopic device. In this way, the tension of the flexible rope can be adjusted by the telescopic device, thereby avoiding the jamming or slipping phenomenon when the sunshade is raised or lowered due to excessive or insufficient tension of the flexible rope, so that the raising and lowering of the sunshade remains smooth and maintains a normal working state.

[0008] In a specific embodiment, the telescopic device includes a compression spring, a limiter, an adjustment rod and a bracket, a receiving groove is provided in the bracket, the compression spring and the limiter are placed in the receiving groove, the free end of the flexible cable is inserted into the receiving groove with clearance fit, and is connected to the limiter after passing through the compression spring, the compression spring is limited between the limiter and the end of the receiving groove near the fixed pulley, the adjustment rod is telescopically mounted on the bracket, and the adjustment rod and the compression spring are coaxially mounted, and the side of the limiter away from the flexible cable is connected to the end of the adjustment rod. In this way, the effective action length of the flexible cable can be shortened by extending the adjustment rod, the flexible cable is in a relaxed state, and the tension of the flexible cable is reduced accordingly, and conversely, the effective action length of the flexible cable can be increased by shortening the adjustment rod, the flexible cable is in a tightened state, and the tension of the flexible cable is increased accordingly.

[0009] Preferably, the adjusting rod is a screw rod, and the adjusting rod is threadedly connected to the bracket. Thus, the adjusting rod can be extended or shortened by rotating the adjusting rod relative to the bracket.

[0010] Preferably, the limiting member is a spherical body, and the diameter of the spherical body is larger than the inner diameter of the compression spring.

[0011] Preferably, the width of the accommodating groove is slightly larger than the outer diameters of the compression spring and the limiting member, so as to efficiently adjust the tensioning force.

[0012] Similarly, the adjusting rod is rigidly connected to the limiting block via a hook.

[0013] In order to synchronously retract and extend the two sides of the sunshade curtain, the flexible rope, fixed pulley and telescopic device are respectively arranged on both sides of the sunshade curtain, and flexible rope grooves are respectively arranged on the inner sides of the fixed pulleys. After the flexible rope on one side of the sunshade curtain passes around the fixed pulley adjacent to it, it passes through the flexible rope groove and is connected with the limiting piece in the telescopic device on the other side of the sunshade curtain.

[0014] Preferably, the free end of the sunshade curtain fabric is connected to the retractable operating mechanism, which is a pull rod, and the flexible cable, fixed pulley, flexible cable slot and telescopic device are respectively installed at both ends of the pull rod. The flexible cable on one side of the pull rod passes through the pull rod and is connected to the telescopic device on the other side of the pull rod.

[0015] In order to ensure that the sunshade curtain cloth can be stably retracted and extended, guide rods are respectively installed on both sides of the sunshade curtain cloth, and the two ends of the pull rod are slidably installed on the guide rods.

[0016] Preferably, the flexible cable is a steel wire rope.

[0017] Compared with the prior art, the advantages of the utility model are:

[0018] The utility model sunshade curtain flexible rope tensioning force adjustment structure can adjust the flexible rope tensioning force through a telescopic device (adjusting rod) outside the sunshade curtain after the sunshade curtain is installed, so as to comfortably operate the lifting and lowering movement of the sunshade curtain.

[0019] The utility model is simple, practical, low in cost and has remarkable effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an appearance structural diagram of the utility model sunshade curtain flexible cable tensioning force adjustment structure.

[0021] Figure 2 yes Figure 1 Enlarged view of point I.

[0022] Figure 3 yes Figure 2 Enlarged view of II.

[0023] Figure 4 yes Figure 2 Enlarged view of point III.

[0024] Figure 5 yes Figure 1 Enlarged view of IV.

[0025] Figure 6 yes Figure 1 Enlarged view of V.

[0026] In the figure:

[0027] 1. Soft rope; 2. Guide rod; 3. Fixed pulley; 4. Soft rope slideway; 5. Compression spring; 6. Limiting member; 7. Adjusting rod; 8. Sunshade curtain fabric; 9. Retracting and extending operating mechanism; 10. Bracket; 11. Reel. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0029] For the convenience of description, the description of the relative position relationship of each component (such as: up, down, left, right, etc.) only indicates that it is consistent with the up, down, left and right directions of the drawing itself, and is described according to the layout direction of the drawings in the specification, and does not limit the structure of this patent.

[0030] Embodiment 1:

[0031] See also Figure 1-Figure 6 The utility model sunshade curtain cable tensioning force adjustment structure of an embodiment mainly includes: a cable 1; a guide rod 2; a fixed pulley 3; a cable slide 4; a compression spring 5; a limiter 6; an adjustment rod 7; a sunshade curtain cloth 8 and a retracting and releasing operating mechanism 9.

[0032] The fixed end of the flexible cable 1 is connected to the reel 11 of the sunshade curtain 8, and the free end is connected to the retracting and extending operating mechanism after passing through the fixed pulley 3. The retracting and extending operating mechanism can realize the retraction and extension of the sunshade curtain 8. At the same time, the friction force between the flexible cable 1 and the fixed pulley 3 can realize the pulling and stopping of the sunshade curtain 8 (realizing pulling and stopping by friction is an existing technology).

[0033] A telescopic device is arranged on the retractable operating mechanism, and the free end of the flexible cable is connected to the retractable operating mechanism via the telescopic device.

[0034] The telescopic device includes the compression spring 5, the limiter 6, the adjustment rod 7 and the bracket 10. A receiving groove is provided in the bracket 10, and the compression spring 5 and the limiter 6 are placed in the receiving groove. The free end of the flexible cable 1 extends into the receiving groove with clearance fit, and is welded to the limiter 6 after passing through the compression spring 5. The width of the receiving groove is slightly larger than the outer diameter of the compression spring 5 and the limiter 6, and the length is slightly equal to the sum of the lengths of the compression spring 5 and the limiter 6, and the diameter of the limiter 6 is larger than the inner diameter of the compression spring 5, so that the compression spring 5 is limited between the limiter 6 and the end of the receiving groove near the fixed pulley. The adjusting rod 7 is telescopically mounted on the bracket 10, and the adjusting rod 7 and the compression spring 5 are coaxially mounted. The side of the limiting member 6 that is away from the flexible cable is rigidly connected to the end of the adjusting rod 7 via a hook. The effective action length of the flexible cable 1 can be shortened by extending the adjusting rod 7, so that the flexible cable 1 is in a relaxed state, and the tension of the flexible cable 1 is reduced accordingly. Conversely, the effective action length of the flexible cable 1 can be increased by shortening the adjusting rod 7, so that the flexible cable 1 is in a tightened state, and the tension of the flexible cable 1 is increased accordingly.

[0035] In this embodiment, the flexible rope 1 is a steel wire rope. Obviously, the flexible rope of the utility model is not limited to a steel wire rope.

[0036] In this embodiment, the compression spring 5 is a damping metal spring, one end of the compression spring 5 is in point contact with the limiting member 6 , and the other end is in surface contact with the top surface of the receiving groove of the bracket 10 .

[0037] In this embodiment, the stopper 6 is a sphere, and the diameter of the sphere is larger than the inner diameter of the compression spring 5. Obviously, the stopper 6 can also be other geometric shapes, as long as its outer dimensions can interfere with the outer diameter of the compression spring 5.

[0038] In this embodiment, the adjusting rod 7 is a screw with external threads, and the adjusting rod 7 is threadedly connected to the bracket 10, and the adjusting rod 7 can be extended or shortened by rotating the adjusting rod 7 relative to the bracket 10. Obviously, the present invention can also adopt other telescopic forms that can be thought of by those skilled in the art.

[0039] In order to make the two sides of the sunshade curtain 8 be retracted and extended synchronously, the flexible cable 1, fixed pulley 3 and telescopic device are respectively arranged on the two sides of the sunshade curtain 8, and the flexible cable slide groove 4 is respectively arranged on the inner side of the fixed pulley 3. After the flexible cable 1 on one side of the sunshade curtain 8 passes around the adjacent fixed pulley 3, it passes through the flexible cable slide groove 4 and is connected with the limiter 6 in the telescopic device on the other side of the sunshade curtain 8. During the process of retracting and extending the sunshade curtain 8, the friction between the flexible cable 1 and the fixed pulley 3 and the flexible cable slide groove 4 is relied on to prevent the entire sunshade curtain 8 from falling.

[0040] To facilitate the retraction and extension of the sunshade curtain 8, the retraction and extension operating mechanism 9 is a pull rod, the free end of the sunshade curtain 8 is connected to the pull rod, and the two ends of the pull rod are respectively installed with the flexible cable 1, fixed pulley 3, flexible cable slide groove 4 and telescopic device, the flexible cable 1 on one side of the sunshade curtain 8 passes through the pull rod 9 and is connected with the limit piece 6 in the telescopic device on the other side of the sunshade curtain 8.

[0041] In order to achieve smooth retraction and extension of the sunshade curtain 8, guide rods 2 are respectively installed on both sides of the sunshade curtain 8, and both ends of the pull rod 9 are slidably installed on the guide rods 2.

[0042] The principle of adjusting the tension of the flexible cable 1 by the adjusting rod 7 of the present invention is as follows:

[0043] like Figure 4 As shown, if the adjusting rod 7 moves upward, the stopper 6 in contact therewith also moves upward. Since the other end of the flexible cable 1 is fixed on the roller 11 of the sunshade, the effective action length of the entire flexible cable 1 is shortened, the flexible cable 1 is in a relaxed state, and the tension of the flexible cable 1 itself is reduced. On the contrary, if the adjusting rod 7 moves downward, the effective action length of the flexible cable 1 increases, the flexible cable 1 is in a tightened state, and the tension of the entire flexible cable 1 itself is increased.

[0044] Since the flexible cable 1 and the fixed pulley 3 are tightly wound, the friction force between the two is proportional to the tension of the flexible cable 1 itself.

[0045] In addition, since the sunshade relies on the friction between the flexible cable 1 and the fixed pulley 3 to overcome the weight of the sunshade curtain 8 to achieve the function of the sunshade curtain 8 to stop when pulled (this is the prior art), when the sunshade curtain 8 feels difficult to pull (that is, the sunshade curtain 8 is in a stuck state), it means that the friction between the flexible cable 1 and the fixed pulley 3 is too large. At this time, the adjusting rod 7 can be moved upward to reduce the tension of the flexible cable 1, that is, reduce the friction between the flexible cable 1 and the fixed pulley 3, so that the sunshade curtain 8 can be pulled smoothly.

[0046] On the contrary, when the sunshade curtain 8 feels very loose when pulled, it means that the friction between the flexible cable 1 and the fixed pulley 3 is too small. At this time, the adjusting rod 7 can be moved downward to increase the tension of the flexible cable 1 and the friction between the flexible cable 1 and the fixed pulley 3, so that the sunshade curtain 8 can be pulled and stopped at will.

[0047] It should be noted that the present invention only adds a tension adjustment mechanism for the flexible cable 1, and does not change the lifting operation and principle of the sunshade itself.

[0048] The working process of the entire sunshade curtain of the utility model is as follows:

[0049] The left and right ends of the roller 11 of the entire sunshade curtain 8 each have a set of roller structures that match the retractable operating mechanism 9. The sunshade curtain 8 can be raised and lowered by pulling or lifting the retractable operating mechanism (pull rod) 9 upward (this part is not the content of the modification of the utility model, so it will not be described in detail). The left and right flexible cables 1 cross through the fixed pulley 3, that is, the flexible cable 1 at the left end passes through the fixed pulley 3 at the left end from the bottom of the fixed pulley 3 at the left end, and then passes through the upper part of the fixed pulley 3 at the right end (see Figure 3 ), and then fixed in the closed accommodating groove cavity of the bracket 10 through the compression spring 5, the limiter 6 and the adjustment rod 7, see Figure 4 The working principle of the flexible cable 1 at the right end is the same.

[0050] In this way, the weight of the entire sunshade curtain 8 is pulled by the left and right soft cables 1. At the same time, if the adjusting rod 7 is a screw rod, the friction between the soft cable 1 and the fixed pulley 3 is adjusted by tightening or loosening the adjusting rod 7. When the magnitude of the friction is equal to the weight of the sunshade curtain 8, the sunshade curtain 8 can be stopped at a certain position. When an external force is applied (i.e., pulling the pull rod 9 downward or lifting it upward), the balance between the weight and friction of the sunshade curtain 8 is broken, so the sunshade curtain 8 can be freely raised and lowered.

[0051] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application is disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession, without departing from the scope of the technical solution of the present application, using the technical content disclosed above to make slight changes or modifications are equivalent to equivalent implementation cases and fall within the scope of the technical solution.

Claims

1. A sunshade curtain cable tensioning force adjustment structure, comprising a cable (1), a fixed pulley (3) and a retractable operating mechanism (9), wherein the fixed end of the cable is connected to a reel of a sunshade curtain fabric (8), and the free end is connected to the retractable operating mechanism after passing around the fixed pulley (3), characterized in that: A telescopic device is provided on the retractable operating mechanism, and the free end of the flexible cable is connected to the retractable operating mechanism via the telescopic device; the telescopic device comprises a compression spring (5), a limiting member (6), an adjusting rod (7) and a bracket (10); a receiving groove is provided in the bracket, and the compression spring and the limiting member are placed in the receiving groove; the free end of the flexible cable extends into the receiving groove with clearance fit, and is connected to the limiting member after passing through the compression spring; the compression spring is limited between the limiting member and the end of the receiving groove near the fixed pulley; the adjusting rod is telescopically mounted on the bracket, and the adjusting rod and the compression spring are coaxially mounted; the side of the limiting member facing away from the flexible cable is connected to the end of the adjusting rod.

2. The sunshade curtain cable tensioning force adjustment structure according to claim 1, characterized in that: The adjusting rod is a screw rod, and the adjusting rod is threadedly connected to the bracket.

3. The sunshade curtain cable tensioning force adjustment structure according to claim 1, characterized in that: The limiting member is a spherical body, and the diameter of the spherical body is larger than the inner diameter of the compression spring.

4. The sunshade curtain cable tensioning force adjustment structure according to claim 1, characterized in that: The width of the accommodating groove is slightly larger than the outer diameters of the compression spring and the limiting member.

5. The sunshade curtain cable tensioning force adjustment structure according to claim 1, characterized in that: The adjusting rod is rigidly connected to the limiting member via a hook.

6. The sunshade curtain cable tensioning force adjustment structure according to claim 1, characterized in that: The flexible rope, fixed pulley and telescopic device are respectively arranged on both sides of the sunshade curtain (8), and flexible rope sliding grooves (4) are respectively arranged on the inner sides of the fixed pulleys. After the flexible rope on one side of the sunshade curtain passes around the adjacent fixed pulley, it passes through the flexible rope sliding groove and is connected with the limiting piece in the telescopic device on the other side of the sunshade curtain.

7. The sunshade curtain cable tensioning force adjustment structure according to claim 6, characterized in that: The free end of the sunshade curtain (8) is connected to the retractable operating mechanism, which is a pull rod, and the two ends of the pull rod are respectively installed with the flexible rope, fixed pulley, flexible rope slide groove and telescopic device, and the flexible rope on one side of the pull rod passes through the pull rod and is connected to the telescopic device on the other side of the pull rod.

8. The sunshade curtain cable tensioning force adjustment structure according to claim 7, characterized in that: Guide rods (2) are respectively installed on both sides of the sunshade curtain fabric, and both ends of the pull rod are slidably installed on the guide rods.

9. The sunshade curtain cable tensioning force adjustment structure according to any one of claims 1 to 8, characterized in that: The flexible rope is a steel wire rope.

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