Steel wire rope automatic tensioning device and glass lifter

Abstract

The application relates to the technical field of glass lifters, and provides a steel wire rope automatic tensioning device which comprises a shell, an inner shaft and elastic members; the shell and the inner shaft are hollow structures which are axially penetrated; the shell comprises a shell body and a plurality of elastic parts; one end of each elastic part is connected to the shell body, and the other end is a free end; the elastic parts extend in the direction away from the shell body along the axial direction of the shell; the plurality of elastic parts are arranged at intervals around the axis of the shell; the free end of each elastic part is provided with a retreat-preventing tooth; the end of the shell body away from the elastic parts is provided with a stepped hole; the inner shaft comprises a guide part, a plurality of expansion parts and a plurality of retreat-preventing parts; the plurality of retreat-preventing parts are arranged at intervals along the axial direction of the inner shaft, and a retreat-preventing groove is formed between two adjacent retreat-preventing parts; the plurality of expansion parts are arranged at intervals around the axis of the inner shaft, and the expansion parts extend in the direction away from the guide part along the axial direction of the inner shaft. The steel wire rope automatic tensioning device has fewer components, low manufacturing cost and is convenient to assemble. The application further provides a glass lifter.

Description

Technical Field

[0001] This application relates to the field of automotive window regulator technology, and in particular to an automatic wire rope tensioning device and a window regulator. Background Technology

[0002] Automotive window regulators are door components used to raise and lower car windows. For rope-type window regulators, the steel cable is an indispensable and crucial component, serving as the carrier for transmitting the motor's output force and displacement. Within the window regulator mechanism, the steel cable needs to maintain a relatively small free length to ensure appropriate tension, achieve optimal efficiency, and guarantee the normal operation of the lifting mechanism.

[0003] Because the wire rope is under stress during operation, the relatively moving parts in the lifting mechanism will wear down under stress, causing the free length of the wire rope to gradually increase. Manufacturing errors in various parts of the lifting device can also lead to excessive free length of the wire rope. When the free length of the wire rope is too large, the motor-driven winding drum needs to tighten the free length portion first. This portion represents the idle stroke, which can lead to low wire rope transmission efficiency, slow lifting device response, incomplete glass lifting, poor glass sealing or misalignment, or even lifting device jamming.

[0004] To address the issue of excessive free length in steel wire ropes, existing technologies typically employ automatic steel wire rope tensioning devices in glass lift mechanisms. One end of this device is mounted on the motor bracket (for securing the wire winding mechanism) or another part of the lift, while the other end abuts against the steel wire rope sleeve (guide tube). When the free length of the steel wire rope increases to a certain extent, the effective length of the automatic tensioning device increases, effectively absorbing and eliminating the excess free length to ensure adequate tension. However, existing automatic steel wire rope tensioning devices either have numerous components, resulting in high manufacturing costs, or are inconvenient to assemble, requiring significant time and effort. Utility Model Content

[0005] To address the aforementioned problems, this application provides an automatic wire rope tensioning device and a window regulator. The automatic wire rope tensioning device is ingeniously designed and has a simple structure. It comprises fewer components, has low manufacturing costs, and is easy to assemble. The technical solution adopted in this application is as follows:

[0006] An automatic wire rope tensioning device includes: a housing, an inner shaft, and an elastic element;

[0007] Both the outer shell and the inner shaft are axially through hollow structures. The outer shell includes an outer shell body and several elastic parts. One end of each elastic part is connected to the outer shell body, and the other end is a free end. The elastic parts extend away from the outer shell body along the axial direction of the outer shell. Several elastic parts are spaced apart from each other around the axis of the outer shell. The free end of each elastic part is provided with a retaining tooth, which is oriented towards the axis of the outer shell. A stepped hole is provided at the end of the outer shell body away from the elastic parts. The stepped hole includes a large-diameter hole and a small-diameter hole.

[0008] The inner shaft includes a guide portion, several expansion portions, and several anti-retraction portions; the expansion portions and the anti-retraction portions are all located on the same side of the guide portion; the several anti-retraction portions are spaced apart along the axial direction of the inner shaft, and an anti-retraction groove is formed between two adjacent anti-retraction portions; the several expansion portions are spaced apart around the axis of the inner shaft, one end of the expansion portion is connected to the guide portion, and the other end extends away from the guide portion along the axial direction of the inner shaft.

[0009] When the outer shell and the inner shaft are assembled, as the guide portion gradually approaches the small-diameter hole, the guide portion first contacts the anti-reverse tooth, and the anti-reverse tooth gradually moves away from the axis of the outer shell under the pushing action of the guide portion; then the expansion portion abuts against the anti-reverse tooth along the radial direction of the inner shaft, and the inner shaft slides relative to the outer shell along the axial direction of the outer shell; after the inner shaft slides a preset distance, by rotating the inner shaft, the expansion portion and the anti-reverse tooth are misaligned, at which point the expansion portion is located between two adjacent elastic portions;

[0010] When the outer shell and the inner shaft are assembled, the inner shaft is located in the cavity of the outer shell, one end of the elastic element abuts against the shoulder of the stepped hole, and the other end abuts against the guide portion; the anti-reverse tooth is adapted to engage with a certain anti-reverse groove; the inner shaft can only move unidirectionally relative to the outer shell under the pushing action of the elastic element and the cooperation between the anti-reverse groove and the anti-reverse tooth.

[0011] This device requires only three components during operation: a housing, an inner shaft, and an elastic element. The reduced number of components significantly reduces manufacturing costs. A guide section and a support section are installed on the inner shaft. The guide section acts as a guide and also expands outwards to prevent the inner shaft from retracting. During the insertion of the inner shaft into the housing, the guide section contacts the anti-retracting teeth on the elastic element. As the inner shaft enters, the guide section gradually expands the anti-retracting teeth outwards (away from the housing axis or the inner shaft axis). The support section connects to the guide section. After the guide section passes the anti-retracting teeth, the anti-retracting teeth contact the support section. The support section keeps the anti-retracting teeth in an expanded state, preventing them from contacting the support section. This allows the inner shaft to smoothly enter the housing. It is important to note that after the inner shaft enters the housing through the expansion of the anti-reverse teeth by the guide and expansion parts, the device is not yet fully assembled. The inner shaft then needs to be rotated relative to the housing to remove the expansion parts from contact with the anti-reverse teeth. In other words, the expansion parts and anti-reverse teeth are circumferentially misaligned, aligning the anti-reverse teeth with the anti-reverse parts. This allows the anti-reverse teeth to engage in the anti-reverse groove as the inner shaft moves away from the housing along the axial direction of the device, restricting the inner shaft to move only away from the housing and preventing it from retracting. The guide and expansion parts facilitate the assembly of the inner shaft into the housing, reducing the difficulty of assembly and ensuring efficient assembly of the inner shaft and housing.

[0012] In some embodiments, the expansion portion is provided with a first protrusion, and the first protrusion is provided with a first guide surface; the outer shell also includes a plurality of sliding groove portions, and a sliding groove portion is provided between two adjacent elastic portions. One end of the sliding groove portion is connected to the outer shell body, and the sliding groove portion is provided with a groove and a clearance notch. The groove extends along the axial direction of the outer shell in a direction away from the outer shell body, and the clearance notch is provided on one side of the groove and communicates with the groove.

[0013] When the outer shell and the inner shaft are assembled, during the sliding of the inner shaft relative to the outer shell along the axial direction of the outer shell, under the action of the first guide surface of the first protrusion, the first protrusion moves from one side of the anti-reverse tooth to the other side of the anti-reverse tooth along the axial direction of the outer shell; after the inner shaft slides the preset distance, the first protrusion and the clearance notch are located at the same axial position of the outer shell, and by rotating the inner shaft, the first protrusion enters the groove through the clearance notch;

[0014] When the outer shell and the inner shaft are in the assembled state, and the inner shaft moves unidirectionally relative to the outer shell, the first protrusion slides within the groove along the extension direction of the groove.

[0015] By incorporating a chute, a clearance notch, and a first protrusion, the clearance notch provides an entry channel for the first protrusion to enter the chute when the inner shaft rotates. The first protrusion can slide within the chute, which restricts the movement of the inner shaft. Under the restriction of the chute, the inner shaft can only move axially during operation, preventing radial wobble and rotation around the shaft, thus avoiding jamming and ensuring the normal operation of the device.

[0016] In some embodiments, two adjacent groove portions along the circumferential direction of the housing are circumferentially connected by a connecting portion at their ends away from the housing body, so that one end of the housing forms a ring structure.

[0017] By setting a connecting part and forming a ring structure at one end of the housing, the overall strength of the housing is improved, the risk of deformation or even damage to the slide groove is reduced, and the slide groove can stably restrict the movement of the inner shaft.

[0018] In some embodiments, the inner shaft further includes an axially penetrating hollow guide shaft, which is connected to the side of the guide portion away from the anti-reverse portion; when the outer shell and the inner shaft are in an assembled state, the elastic element is sleeved on the outside of the guide shaft, and the guide shaft passes through the small-diameter hole.

[0019] By incorporating a hollow guide shaft, the smoothness of the inner shaft's sliding within the housing is improved, preventing radial wobble and reducing the risk of jamming. Furthermore, the elastic element fitted onto the guide shaft ensures that it can only deform axially along the device, guaranteeing a stable thrust that propels the inner shaft away from the housing.

[0020] In some embodiments, the end of the outer casing away from the elastic part is a stepped shaft, the stepped shaft including a major diameter shaft and a minor diameter shaft, the minor diameter shaft being away from the elastic part relative to the major diameter shaft.

[0021] By setting one end of the housing body as a stepped shaft, the small-diameter shaft is easy to insert into the mounting position of the device in the window regulator, while the shoulder of the stepped shaft abuts against the mounting position.

[0022] In some embodiments, the inner shaft is provided with a tapered guide hole and a mating hole, which are arranged along the axial direction of the inner shaft. One end of the small hole of the tapered guide hole communicates with the mating hole, and the end of the mating hole near the tapered guide hole has a shoulder. The mating hole is adapted to accommodate the end of the wire rope sleeve, and the shoulder in the mating hole is adapted to abut against the end of the wire rope sleeve. By providing a tapered guide hole, the wire rope can be guided smoothly into the inner shaft, facilitating the installation of the wire rope.

[0023] In some embodiments, reinforcing ribs are provided on the outer side of the elastic portion and / or the outer side of the groove portion, the reinforcing ribs extending axially along the outer shell and protruding radially along the outer shell.

[0024] By adding reinforcing ribs, the strength of the elastic part and / or the sliding part can be improved, reducing the risk of excessive plastic deformation or even damage to the elastic part and the sliding part.

[0025] In some embodiments, the wall of the mating hole is provided with second protrusions that are spaced apart circumferentially along the mating hole.

[0026] By setting a second protrusion inside the docking hole, the connection strength between the end of the wire rope sleeve in the glass lifter and the docking hole can be ensured. The second protrusion forms radial compression on the end of the wire rope sleeve.

[0027] In some embodiments, the guide portion is frustoconical.

[0028] On the other hand, this application provides a window lifter, including the aforementioned automatic wire rope tensioning device.

[0029] The automatic wire rope tensioning device and window regulator provided in this application have at least one of the following beneficial effects:

[0030] 1. This application provides an automatic wire rope tensioning device that requires only three components during operation: a housing, an inner shaft, and an elastic element. This reduced component count significantly lowers manufacturing costs. A guide section and a support section are provided on the inner shaft. The guide section acts as a guide and also expands outwards to prevent the inner shaft from retracting. During the insertion of the inner shaft into the housing, the guide section contacts the anti-retracting teeth on the elastic element. As the inner shaft enters, the guide section gradually expands the anti-retracting teeth outwards (away from the housing axis or the inner shaft axis). The support section connects to the guide section. After the guide section passes the anti-retracting teeth, the anti-retracting teeth contact the support section. The support section keeps the anti-retracting teeth in an expanded state, preventing them from contacting the support section. This allows the inner shaft to smoothly enter the housing. It is important to note that after the inner shaft enters the housing through the expansion of the anti-reverse teeth by the guide and expansion parts, the device is not yet fully assembled. The inner shaft then needs to be rotated relative to the housing to remove the expansion parts from contact with the anti-reverse teeth. In other words, the expansion parts and anti-reverse teeth are circumferentially misaligned, aligning the anti-reverse teeth with the anti-reverse parts. This allows the anti-reverse teeth to engage in the anti-reverse groove as the inner shaft moves away from the housing along the axial direction of the device, restricting the inner shaft to move only away from the housing and preventing it from retracting. The guide and expansion parts facilitate the assembly of the inner shaft into the housing, reducing the difficulty of assembly and ensuring efficient assembly of the inner shaft and housing.

[0031] 2. The automatic wire rope tensioning device provided in this application, by setting a slide groove, a clearance notch, and a first protrusion, provides an entry channel for the first protrusion to enter the slide groove when the inner shaft is rotated. The first protrusion can slide within the slide groove, which restricts the movement of the inner shaft. Under the restriction of the slide groove, the inner shaft can only move axially during operation, preventing radial swaying and rotation around the shaft, thus avoiding jamming of the inner shaft and ensuring the normal operation of the device.

[0032] 3. The automatic wire rope tensioning device provided in this application improves the overall strength of the outer shell by setting a connecting part and forming a ring structure at one end of the outer shell, reduces the risk of deformation or even damage to the slide groove, and ensures that the slide groove can stably restrict the movement of the inner shaft.

[0033] 4. The automatic wire rope tensioning device provided in this application improves the smoothness of the inner shaft sliding within the outer casing by setting a hollow guide shaft, avoiding radial wobbling of the inner shaft and reducing the risk of inner shaft jamming. Furthermore, the elastic element sleeved on the guide shaft ensures that the elastic element can only deform along the axial direction of the device, guaranteeing that the elastic element stably provides a thrust to the inner shaft away from the outer casing.

[0034] 5. The automatic wire rope tensioning device provided in this application sets one end of the outer shell body as a stepped shaft, and the small-diameter shaft is easy to insert into the installation position of the device in the glass lifter, while the shoulder of the stepped shaft abuts against the installation position.

[0035] 6. The automatic wire rope tensioning device provided in this application can guide the wire rope to smoothly pass through the inner shaft by setting a tapered guide hole, which facilitates the installation of the wire rope.

[0036] 7. The automatic wire rope tensioning device provided in this application can improve the strength of the elastic part and / or the sliding part by setting reinforcing ribs, and reduce the risk of excessive plastic deformation or even damage to the elastic part and the sliding part.

[0037] 8. The automatic tensioning device for steel wire rope provided in this application can ensure the connection strength between the end of the steel wire rope sleeve in the glass lifter and the docking hole by setting a second protrusion in the docking hole, and the second protrusion forms radial compression on the end of the steel wire rope sleeve. Attached Figure Description

[0038] The preferred embodiments will now be described in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of an automatic wire rope tensioning device and a window regulator:

[0039] Figure 1 This is a schematic diagram of the assembled state of an embodiment of the automatic wire rope tensioning device of this application;

[0040] Figure 2 yes Figure 1 Exploded view of the embodiment;

[0041] Figure 3 yes Figure 1 Cross-sectional view of the embodiment;

[0042] Figure 4 This is a schematic diagram of the overall structure of one embodiment of the outer casing;

[0043] Figure 5 yes Figure 4 Cross-sectional view of the embodiment;

[0044] Figure 6 This is a schematic diagram of the overall structure of one embodiment of the inner shaft;

[0045] Figure 7 yes Figure 6 Cross-sectional view of the embodiment.

[0046] Explanation of icon numbers:

[0047] Outer shell 1, outer shell body 11, large diameter shaft 111, small diameter shaft 112, elastic part 12, anti-reverse tooth 121, large diameter hole 13, small diameter hole 14, sliding groove part 15, sliding groove 151, clearance notch 152, connecting part 16, reinforcing rib 17, inner shaft 2, guide part 21, expansion part 22, first protrusion 221, first guide surface 2211, anti-reverse part 23, anti-reverse groove 231, guide shaft 24, tapered guide hole 25, mating hole 26, second protrusion 261, elastic element 3, V-shaped spring buckle 4. Detailed Implementation

[0048] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0049] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0050] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0051] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0052] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0053] refer to Figures 1-7 This application provides an automatic wire rope tensioning device, comprising: a housing 1, an inner shaft 2, and an elastic element 3; both the housing 1 and the inner shaft 2 are axially penetrating hollow structures; the housing 1 includes a housing body 11 and a plurality of elastic parts 12; one end of each elastic part 12 is connected to the housing body 11, and the other end is a free end, and the elastic parts 12 extend away from the housing body 11 along the axial direction of the housing 1, and the plurality of elastic parts 12 are arranged at intervals around the axis of the housing 1; the free end of the elastic part 12 is provided with a stop tooth 121, which is arranged towards the axis of the housing 1; a stepped hole is provided at one end of the housing body 11 away from the elastic part 12, the stepped hole including a large-diameter hole 13 and a small-diameter hole 14;

[0054] The inner shaft 2 includes a guide portion 21, a plurality of expansion portions 22 and a plurality of anti-retraction portions 23; the expansion portions 22 and the anti-retraction portions 23 are both located on the same side of the guide portion 21; the plurality of anti-retraction portions 23 are arranged at intervals along the axial direction of the inner shaft 2, and an anti-retraction groove 231 is formed between two adjacent anti-retraction portions 23; the plurality of expansion portions 22 are arranged at intervals around the axis of the inner shaft 2, one end of the expansion portion 22 is connected to the guide portion 21, and the other end extends away from the guide portion 21 along the axial direction of the inner shaft 2.

[0055] When the outer shell 1 and the inner shaft 2 are assembled, as the guide part 21 gradually approaches the small diameter hole 14, the guide part 21 first contacts the anti-reverse tooth 121. Under the pushing action of the guide part 21, the anti-reverse tooth 121 gradually moves away from the axis of the outer shell 1. Then, the expansion part 22 abuts against the anti-reverse tooth 121 in the radial direction of the inner shaft 2, and the inner shaft 2 slides relative to the outer shell 1 in the axial direction of the outer shell 1. After the inner shaft 2 slides a preset distance, by rotating the inner shaft 2, the expansion part 22 and the anti-reverse tooth 121 are misaligned. At this time, the expansion part 22 is located between two adjacent elastic parts 12.

[0056] When the outer shell 1 and the inner shaft 2 are assembled, the inner shaft 2 is located in the cavity of the outer shell 1. One end of the elastic element 3 abuts against the shoulder of the stepped hole, and the other end abuts against the guide part 21. The anti-reverse tooth 121 is adapted to be engaged with a certain anti-reverse groove 231. Under the pushing action of the elastic element 3 and the cooperation between the anti-reverse groove 231 and the anti-reverse tooth 121, the inner shaft 2 can only move in one direction relative to the outer shell 1.

[0057] It is worth noting that the side of the anti-retraction part 23 away from the small diameter hole 14 is a guide slope (not shown in the figure). The guide slope is used to drive the anti-retraction tooth 121 to expand circumferentially when the inner shaft 2 moves away from the outer shell 1. The side of the anti-retraction part 23 near the small diameter hole 14 is a retraction surface (not shown in the figure). By setting the guide slope, the anti-retraction part 23 of the inner shaft 2 can push the anti-retraction tooth 121, causing the anti-retraction tooth 121 to expand circumferentially, thereby making it easier for the inner shaft 2 to slide outward. By setting the retraction surface, the retraction surface prevents the inner shaft 2 from moving towards the elastic member 3, so that the inner shaft 2 can only slide outward, thereby increasing the effective length of the automatic tensioning device.

[0058] The device requires only three components during operation: the outer casing, the inner shaft 2, and the elastic element 3. This reduced number of components significantly lowers manufacturing costs. A guide section 21 and a support section 22 are provided on the inner shaft 2. The guide section 21 serves as a guide and also expands outwards to accommodate the anti-reverse teeth 121. During the insertion of the inner shaft 2 into the outer casing 1, the guide section 21 contacts the anti-reverse teeth 121 on the elastic element 12. As the inner shaft 2 enters, the guide section 21 gradually expands the anti-reverse teeth 121 outwards (away from the axis of the outer casing 1 or away from the axis of the inner shaft 2). The support section 22 connects to the guide section 21. After the guide section 21 passes the anti-reverse teeth 121, the anti-reverse teeth 121 contact the support section 22. The support section 22 keeps the anti-reverse teeth 121 in an expanded state. At this time, the anti-reverse teeth 121 do not contact the anti-reverse part 23, thus allowing the inner shaft 2 to smoothly enter the outer casing 1. It is important to note that after the inner shaft 2 enters the outer casing 1 through the expansion of the anti-reverse tooth 121 by the guide portion 21 and the expansion portion 22, the device is not yet fully assembled. The inner shaft 2 then needs to be rotated relative to the outer casing 1 so that the expansion portion 22 and the anti-reverse tooth 121 are no longer in contact. In other words, the expansion portion 22 and the anti-reverse tooth 121 are circumferentially misaligned (displaced), so that the anti-reverse tooth 121 aligns with the anti-reverse portion 23. In this way, under the outward pushing action of the elastic element 3, the anti-reverse tooth 121 can be engaged in the anti-reverse groove 231 when the inner shaft 2 moves away from the outer casing 1 along the axial direction of the device, restricting the inner shaft 2 to move only away from the outer casing 1 and preventing it from retracting. The guide portion 21 and the expansion portion 22 facilitate the assembly of the inner shaft 2 into the outer casing 1, reducing the difficulty of assembling the inner shaft 2 into the outer casing 1 and ensuring the assembly efficiency of the inner shaft 2 and the outer casing 1.

[0059] refer to Figures 1-7In one embodiment, the expansion portion 22 is provided with a first protrusion 221, and the first protrusion 221 is provided with a first guide surface 2211; the outer shell 1 also includes a plurality of sliding groove portions 15, a sliding groove portion 15 is provided between two adjacent elastic portions 12, one end of the sliding groove portion 15 is connected to the outer shell body 11, the sliding groove portion 15 is provided with a sliding groove 151 and a clearance notch 152, the sliding groove 151 extends away from the outer shell body 11 along the axial direction of the outer shell 1, and the clearance notch 152 is provided on one side of the sliding groove 151 and communicates with the sliding groove 151;

[0060] When the outer shell 1 and the inner shaft 2 are assembled, during the process of the inner shaft 2 sliding relative to the outer shell 1 along the axial direction of the outer shell 1, under the action of the first guide surface 2211 of the first protrusion 221, the first protrusion 221 enters from one side of the anti-retraction tooth 121 to the other side of the anti-retraction tooth 121 along the axial direction of the outer shell 1; after the inner shaft 2 slides a preset distance, the first protrusion 221 and the clearance notch 152 are located at the same axial position of the outer shell 1. By rotating the inner shaft 2, the first protrusion 221 enters the slide groove 151 through the clearance notch 152.

[0061] When the outer shell 1 and the inner shaft 2 are in the assembled state, when the inner shaft 2 moves unidirectionally relative to the outer shell 1, the first protrusion 221 slides in the groove 151 along the extension direction of the groove 151.

[0062] It is easy to understand that by setting the slide groove 151, the clearance notch 152, and the first protrusion 221, the clearance notch 152 provides an entry channel for the rotating inner shaft 2 to allow the first protrusion 221 to enter the slide groove 151, so that the first protrusion 221 can enter the slide groove 151 through the clearance notch 152 when the inner shaft 2 is rotated. The first protrusion 221 can slide in the slide groove 151, and the slide groove 151 restricts the movement of the inner shaft 2. Under the restriction of the slide groove 151, when the device is working, the inner shaft 2 can only move axially and will not experience radial wobble or rotation around the axis, thus avoiding jamming of the inner shaft 2 and ensuring the normal operation of the device.

[0063] refer to Figures 1-5 In one embodiment, a reinforcing rib 17 is provided on the outer side of the elastic portion 12 and / or the outer side of the groove portion 15. The reinforcing rib 17 extends along the axial direction of the outer shell 1 and protrudes along the radial direction of the outer shell 1. By providing the reinforcing rib 17, the strength of the elastic portion 12 and / or the groove portion 15 can be improved, reducing the risk of excessive plastic deformation or even damage to the elastic portion 12 and the groove portion 15.

[0064] refer to Figures 1-5In one embodiment, two adjacent circumferentially adjacent slide grooves 15 are circumferentially connected at their ends away from the outer casing body 11 by a connecting portion 16, so that one end of the outer casing 1 forms a ring structure. It is understood that by providing the connecting portion 16 and forming a ring structure at one end of the outer casing 1, the overall strength of the outer casing 1 is improved, the risk of deformation or even damage to the slide groove 15 is reduced, and the slide groove 151 can stably restrict the movement of the inner shaft 2.

[0065] refer to Figures 1-3 , Figure 6 , Figure 7 In one embodiment, the inner shaft 2 further includes an axially penetrating hollow guide shaft 24, which is connected to the guide portion 21 on the side away from the anti-reverse portion 23. When the outer shell 1 and the inner shaft 2 are in the assembled state, the elastic member 3 is sleeved on the guide shaft 24, and the guide shaft 24 passes through the small diameter hole 14.

[0066] It is worth noting that by setting a hollow guide shaft 24, the smoothness of the inner shaft 2 sliding in the outer casing 1 is improved, radial wobbling of the inner shaft 2 is avoided, and the risk of jamming of the inner shaft 2 is reduced. In addition, the elastic element 3 is sleeved on the guide shaft 24, so that the elastic element 3 can only deform along the axial direction of the device, ensuring that the elastic element 3 stably provides the inner shaft 2 with a thrust away from the outer casing 1.

[0067] refer to Figures 1-5 In one embodiment, the end of the housing body 11 away from the elastic part 12 is a stepped shaft, which includes a major diameter shaft 111 and a minor diameter shaft 112, with the minor diameter shaft 112 being away from the elastic part 12 relative to the major diameter shaft 111. By setting one end of the housing body 11 as a stepped shaft, the minor diameter shaft 112 is easily inserted into the mounting position of the device in the window regulator, while the shoulder of the stepped shaft abuts against the mounting position.

[0068] refer to Figures 1-3 , Figure 6 , Figure 7 In one embodiment, the inner shaft 2 is provided with a tapered guide hole 25 and a mating hole 26. The tapered guide hole 25 and the mating hole 26 are arranged along the axial direction of the inner shaft 2. One end of the small hole of the tapered guide hole 25 communicates with the mating hole 26. The end of the mating hole 26 near the tapered guide hole 25 is provided with a shoulder. The mating hole 26 is adapted to accommodate the end of the wire rope sleeve (not shown in the figure), and the shoulder in the mating hole 26 is adapted to abut against the end of the wire rope sleeve. By providing the tapered guide hole 25, the wire rope can be guided smoothly into the inner shaft 2, facilitating the installation of the wire rope.

[0069] refer to Figures 1-3 , Figure 6 , Figure 7In one embodiment, the wall of the docking hole 26 is provided with second protrusions 261 spaced circumferentially along the docking hole 26. By providing the second protrusions 261 in the docking hole 26, the connection strength between the end of the wire rope sleeve in the glass lifter and the docking hole 26 can be ensured, and the second protrusions 261 form radial compression on the end of the wire rope sleeve.

[0070] refer to Figure 2 , Figure 3 , Figure 7 In one embodiment, the guide portion 21 is frustum-shaped. Specifically, the frustum shape includes a frustum-shaped cone and a frustum-shaped pyramid. In other embodiments, the guide portion 21 can also be other shapes, as long as it can push the anti-reverse tooth 121 outward when the inner shaft 2 is installed, so that the expansion portion 22 can smoothly abut against the anti-reverse tooth 121.

[0071] refer to Figures 1-3 In one embodiment, after the inner shaft 2 and the outer casing 1 are assembled, a V-shaped spring clip 4 restricts the movement of the inner shaft 2 relative to the outer casing 1, keeping the device in its initial state. In the initial state, the V-shaped spring clip 4 is engaged at one end of the outer casing 1, and one end of the inner shaft 2 abuts against the V-shaped spring clip 4. After the automatic wire rope tensioning device is installed on the window regulator, the V-shaped spring clip 4 can be removed, and the automatic wire rope tensioning device is then in its working state. In other embodiments, a fixing pin can also be used to keep the device in its initial state. The outer casing 1 and the inner shaft 2 have corresponding holes, and the fixing pin is inserted into the holes of the inner shaft 2 and the outer casing.

[0072] On the other hand, this application also provides a glass lifter, including the aforementioned automatic wire rope tensioning device. The specific structure of the automatic wire rope tensioning device is as described in the foregoing embodiments. Since the glass lifter adopts the technical solution of the foregoing embodiments, it at least has the beneficial effects brought about by the technical solution of the foregoing embodiments, which will not be elaborated here.

[0073] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An automatic wire rope tensioning device, characterized in that, include: outer casing, inner shaft, and elastic components; Both the outer shell and the inner shaft are axially through hollow structures; the outer shell includes an outer shell body and several elastic parts; One end of the elastic part is connected to the outer shell body, and the other end is a free end. The elastic part extends away from the outer shell body along the axial direction of the outer shell. A plurality of elastic parts are arranged at intervals around the axis of the outer shell. The free end of the elastic part is provided with a backstop tooth, which is arranged towards the axis of the outer shell. A stepped hole is provided in the outer shell body at the end away from the elastic part. The stepped hole includes a large-diameter hole and a small-diameter hole. The inner shaft includes a guide portion, several expansion portions, and several anti-retraction portions; the expansion portions and the anti-retraction portions are all located on the same side of the guide portion; the several anti-retraction portions are spaced apart along the axial direction of the inner shaft, and an anti-retraction groove is formed between two adjacent anti-retraction portions; the several expansion portions are spaced apart around the axis of the inner shaft, one end of the expansion portion is connected to the guide portion, and the other end extends away from the guide portion along the axial direction of the inner shaft. When the outer shell and the inner shaft are assembled, as the guide portion gradually approaches the small-diameter hole, the guide portion first contacts the anti-reverse tooth, and the anti-reverse tooth gradually moves away from the axis of the outer shell under the pushing action of the guide portion; then the expansion portion abuts against the anti-reverse tooth along the radial direction of the inner shaft, and the inner shaft slides relative to the outer shell along the axial direction of the outer shell; after the inner shaft slides a preset distance, by rotating the inner shaft, the expansion portion and the anti-reverse tooth are misaligned, at which point the expansion portion is located between two adjacent elastic portions; When the outer shell and the inner shaft are assembled, the inner shaft is located in the cavity of the outer shell, one end of the elastic element abuts against the shoulder of the stepped hole, and the other end abuts against the guide portion; the anti-reverse tooth is adapted to engage with a certain anti-reverse groove; the inner shaft can only move unidirectionally relative to the outer shell under the pushing action of the elastic element and the cooperation between the anti-reverse groove and the anti-reverse tooth.

2. The automatic wire rope tensioning device according to claim 1, characterized in that, The expansion portion is provided with a first protrusion, and the first protrusion is provided with a first guide surface; the outer shell also includes a plurality of sliding groove portions, and a sliding groove portion is provided between two adjacent elastic portions. One end of the sliding groove portion is connected to the outer shell body. The sliding groove portion is provided with a sliding groove and a clearance notch. The sliding groove extends away from the outer shell body along the axial direction of the outer shell. The clearance notch is provided on one side of the sliding groove and communicates with the sliding groove. When the outer shell and the inner shaft are assembled, during the sliding of the inner shaft relative to the outer shell along the axial direction of the outer shell, under the action of the first guide surface of the first protrusion, the first protrusion moves from one side of the anti-reverse tooth to the other side of the anti-reverse tooth along the axial direction of the outer shell; after the inner shaft slides the preset distance, the first protrusion and the clearance notch are located at the same axial position of the outer shell, and by rotating the inner shaft, the first protrusion enters the groove through the clearance notch; When the outer shell and the inner shaft are in the assembled state, and the inner shaft moves unidirectionally relative to the outer shell, the first protrusion slides within the groove along the extension direction of the groove.

3. The automatic wire rope tensioning device according to claim 2, characterized in that, Two adjacent sliding groove portions along the circumference of the outer shell are circumferentially connected by a connecting portion at their ends away from the outer shell body, so that one end of the outer shell forms a ring structure.

4. The automatic wire rope tensioning device according to claim 1, characterized in that, The inner shaft also includes an axially penetrating hollow guide shaft, which is connected to the guide portion on the side away from the anti-reverse portion. When the outer shell and the inner shaft are in the assembled state, the elastic element is sleeved on the guide shaft, and the guide shaft passes through the small diameter hole.

5. The automatic wire rope tensioning device according to claim 1, characterized in that, The end of the outer shell body away from the elastic part is a stepped shaft, which includes a major diameter shaft and a minor diameter shaft, and the minor diameter shaft is away from the elastic part relative to the major diameter shaft.

6. The automatic wire rope tensioning device according to claim 1, characterized in that, The inner shaft is provided with a tapered guide hole and a docking hole. The tapered guide hole and the docking hole are arranged along the axial direction of the inner shaft. One end of the small hole of the tapered guide hole is connected to the docking hole. The docking hole is provided with a shoulder at one end near the tapered guide hole. The docking hole is adapted to accommodate the end of the wire rope sleeve. The shoulder in the docking hole is adapted to abut against the end of the wire rope sleeve.

7. The automatic wire rope tensioning device according to claim 2, characterized in that, The outer side of the elastic part and / or the outer side of the sliding groove part are provided with reinforcing ribs, the reinforcing ribs extend along the axial direction of the outer shell, and the reinforcing ribs protrude along the radial direction of the outer shell.

8. The automatic wire rope tensioning device according to claim 6, characterized in that, The wall of the docking hole is provided with second protrusions that are spaced apart circumferentially along the docking hole.

9. An automatic wire rope tensioning device according to any one of claims 1-8, characterized in that, The guide section is frustoconical in shape.

10. A window regulator, characterized in that, Includes the automatic wire rope tensioning device as described in any one of claims 1-9.

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