Low-noise linear sliding sheath with tail end mechanically limited and assembly
By designing the combination of outer sheath, inner sheath and fasteners, the circumferential limiting mechanism and glued inner parts are used to solve the problem that sliding sheath cannot take into account both mechanical limiting and noise reduction, achieving a simple and effective noise reduction effect.
Patent Information
- Application Number
- CN202422280992.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2025-08-05
- Estimated Expiration
- 2034-09-19
AI Technical Summary
The existing sliding sheath cannot take into account both mechanical limits and noise reduction functions, and is complex in structure.
A sliding sheath including an outer sheath, an inner sheath and a fastener is designed. Through the combination of a circumferential limiting mechanism and an adhesive inner member, mechanical limiting is achieved and noise is reduced. The circumferential limiting mechanism consists of a convex rib on the inner sheath and a limiting groove of the fastener. The adhesive inner member is used for soft and hard contact to reduce noise.
The sliding sheath is achieved to reduce the noise while mechanically limiting the use, and the structure is simple and effective.
Smart Images
Figure CN223190738U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical equipment, in particular to a low-noise linear sliding sheath with terminal mechanical limit and an assembly. Background Art
[0002] The actuator is a hydraulic component widely used in aerospace, machinery manufacturing, automobile manufacturing and other fields. Its core function is to convert hydraulic energy into mechanical energy to achieve linear reciprocating motion. On aircraft, the actuator is used to control various control surfaces of the aircraft, such as elevators, rudders, ailerons, etc. The transmission mechanism inside the actuator can amplify or reduce the force transmitted from the control device to adapt to different control requirements.
[0003] At present, the actuator needs to be equipped with a sliding sleeve on the outside. However, in the existing technology, the sliding sleeve cannot simultaneously take into account the functions of mechanical limiting and reducing operating noise, and most sliding sleeves have complex structures. To address such problems, the present invention provides a sliding sleeve. Utility Model Content
[0004] The utility model provides a low-noise linear sliding sheath with mechanical end limit, so as to alleviate the problem in the prior art that the sheath cannot achieve both mechanical limit and noise reduction.
[0005] In order to alleviate the above technical problems, the technical solution provided by the present invention is:
[0006] It includes an outer sleeve, an inner sleeve and a fastener, the actuator is inserted from one end of the outer sleeve, the fastener is plugged into the other end of the outer sleeve, the inner sleeve is movably connected to the fastener, a rubber-coated inner part is provided between the fastener and the inner sleeve, the fastener and the inner sleeve are connected by a circumferential limiting mechanism, the circumferential limiting mechanism includes a convex rib provided on the inner sleeve and a limiting groove provided on the fastener, and the circumferential limiting mechanism is locked after the outer sleeve is rotated circumferentially so that the convex rib enters the limiting groove.
[0007] Furthermore, the circumferential limiting mechanism also includes a locking strip and a locking tongue provided on the fastener, and the limiting groove is formed between the locking strip and the locking tongue.
[0008] Furthermore, the locking strip protrudes inward from the inner wall of the fastener, the locking tongue is arranged in the notch of the fastener and forms a cantilever structure, and the locking tongue can be tilted up and pressed down in the radial direction.
[0009] Furthermore, a step structure is provided in the outer sheath, and the step structure forms a locking end face. When the rib of the inner sheath abuts against the locking end face, the outer sheath and the outer sheath are against each other, and the circumferential limiting mechanism is locked to form a mechanical lock.
[0010] Furthermore, a plurality of fastening notches are provided at one end of the outer sheath close to the fastener, and the fastener is inserted into the fastening notches.
[0011] Furthermore, a locking groove is provided at one end of the outer sheath close to the fastener, and a snap ring is provided on the fastener, and the snap ring and the locking groove are engaged with each other.
[0012] Furthermore, the outer sheath is further provided with a plurality of guide grooves, and the ribs slide along the guide grooves.
[0013] Furthermore, the rubber-coated inner part is a thermoplastic elastic colloid, and the rubber-coated inner part is injection-molded on the inner wall of the fastener.
[0014] Furthermore, the inner sleeve is also provided with fine ribs, and a plurality of the fine ribs are evenly distributed circumferentially on the outer wall of the inner sleeve. The free end of the inner sleeve is provided with a buffer rubber ring, and the buffer rubber ring is arranged on the outside of the fine ribs. When the actuator cylinder is retracted to the shortest position, the fastener and the buffer rubber ring abut against each other.
[0015] Furthermore, it includes an actuator and a push-on sleeve, wherein the push-on sleeve is plugged into the end of the outer sleeve facing away from the fastener, and the actuator passes through the push-on sleeve and enters the inner cavity of the outer sleeve. The beneficial effects of the low-noise linear sliding sleeve with mechanical end limit in the present invention are analyzed as follows:
[0016] The utility model discloses a low-noise linear sliding sleeve with end mechanical limit, comprising an outer sleeve, an inner sleeve and a fastener, an actuator cylinder is inserted from one end of the outer sleeve, the fastener is plugged into the other end of the outer sleeve, the inner sleeve and the fastener are movably connected, a rubber-coated inner part is provided between the fastener and the inner sleeve, the fastener and the inner sleeve are connected by a circumferential limiting mechanism, the circumferential limiting mechanism comprises a convex rib arranged on the inner sleeve and a limiting groove arranged on the fastener, and the circumferential limiting mechanism is locked after the outer sleeve is rotated circumferentially so that the convex rib enters the limiting groove.
[0017] When the actuator is extended to its maximum length, the fastener is tightly connected to the outer sleeve, and there is a circumferential limit mechanism between the inner sleeve and the fastener. The outer sleeve rotates circumferentially, and the fastener rotates circumferentially with the outer sleeve. The rib enters the limit groove and locks the inner and outer sleeves circumferentially. The inner and outer sleeves are against each other, and the actuator no longer extends or retracts. During the extension and retraction process, the fastener and the outer sleeve are in contact only through the rubber-coated inner part and the inner sleeve.
[0018] The mechanical limitation of the sliding sleeve is achieved by a circumferential limiting mechanism between the fastener and the inner sleeve, and a rubber-coated inner part is provided to achieve soft and hard contact between the workpieces so that the sliding sleeve can be limited while reducing noise during use.
[0019] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in related technologies, the following briefly introduces the drawings required for use in the specific implementation methods or related technical descriptions. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 A schematic structural diagram of a low-noise linear sliding sheath with mechanical end limit provided by an embodiment of the utility model;
[0021] Figure 2 A cross-sectional view of a low-noise linear sliding sheath with mechanical end limit provided by an embodiment of the present utility model;
[0022] Figure 3 A schematic structural diagram of the inner sheath provided in an embodiment of the present utility model;
[0023] Figure 4 A schematic structural diagram of a fastener provided by an embodiment of the present utility model;
[0024] Figure 5 A cross-sectional view of an outer sheath provided in an embodiment of the present utility model;
[0025] Figure 6 Schematic diagram of the relationship between the outer sheath and the inner sheath in the locked state provided by an embodiment of the present utility model.
[0026] icon:
[0027] 100, actuator; 200, outer sheath; 300, inner sheath; 400, fastener; 500, circumferential limit mechanism; 600, rubber-coated inner part; 210, locking end face; 510, convex rib; 002, fastening notch; 003, locking groove; 410, snap ring; 004, guide groove; 520, locking strip; 530, locking tongue; 310, fine rib; 700, buffer rubber ring; 800, top kit; 001, limit groove.
[0028] Example 1 DETAILED DESCRIPTION
[0029] This embodiment provides a low-noise linear sliding sheath with mechanical end limit, please refer to Figures 1-6, including an outer sleeve 200, an inner sleeve 300 and a fastener 400, the actuator 100 is inserted from one end of the outer sleeve 200, the fastener 400 is plugged into the other end of the outer sleeve 200, the inner sleeve 300 is movably connected to the fastener 400, and a rubber-coated inner part 600 is provided between the fastener 400 and the inner sleeve 300. The fastener 400 and the inner sleeve 300 are connected by a circumferential limiting mechanism 500, and the circumferential limiting mechanism 500 includes a convex rib 510 provided on the inner sleeve 300 and a limiting groove 001 provided on the fastener 400. After the outer sleeve 200 is rotated circumferentially so that the convex rib 510 enters the limiting groove 001, the circumferential limiting mechanism 500 is locked.
[0030] When the actuator 100 is extended to the maximum length position, the fastener 400 is tightly connected to the outer sleeve 200, and there is a circumferential limiting mechanism 500 between the inner sleeve 300 and the fastener 400. The outer sleeve 200 rotates circumferentially. At this time, the fastener 400 rotates circumferentially with the outer sleeve 200, and the rib 510 enters the limiting groove 001 to circumferentially lock the inner sleeve 300 and the outer sleeve 200. The inner sleeve 300 and the outer sleeve 200 are against each other, and the actuator 100 no longer extends or retracts; during the extension and retraction process, the fastener 400 and the outer sleeve 200 are only in contact with the inner sleeve 300 through the rubber-coated inner part 600.
[0031] The mechanical limitation of the sliding sleeve is achieved by the circumferential limiting mechanism 500 between the fastener 400 and the inner sleeve 300, and the rubber-coated inner part 600 is provided to achieve soft and hard contact between the workpieces so that the sliding sleeve can be limited while reducing the noise generated during use.
[0032] In this embodiment, the circumferential limiting mechanism 500 further includes a locking strip 520 and a locking tongue 530 provided on the fastener 400 , and a limiting groove 001 is formed between the locking strip 520 and the locking tongue 530 .
[0033] In the optional scheme of this embodiment, it is more preferred that a single locking tongue 530 and the locking strips 520 on both sides form two limiting grooves 001, and the outer sleeve 200 is rotated to switch the clamping position of the rib 510 between the two limiting grooves 001. The circumferential limiting mechanism 500 opens and closes the circumferential locking of the inner sleeve 300 and the outer sleeve 200 as the position of the rib 510 switches.
[0034] In this embodiment, the locking strip 520 protrudes inward from the inner wall of the fastener 400, and the locking tongue 530 is disposed in the notch of the fastener 400 to form a cantilever structure. The locking tongue 530 can be tilted up and pressed down in the radial direction.
[0035] In the optional scheme of this embodiment, it is more preferred that 2-6 locking strips 520 are evenly distributed in the circumferential direction of the inner circle of the fastener 400, and 2-6 locking tongues 530 are set in the circumferential direction. When the actuator 100 is in the unlocked position, the outer sleeve 200 is rotated counterclockwise to the locked position when the actuator 100 is in the maximum extension position. The locking strips 520 and the locking tongues 530 are located on both sides of the rib 510 of the inner sleeve 300, limiting the circumferential position of the outer sleeve 200 and the inner sleeve 300 relative to each other. Correspondingly, at this time, the right end face of the circumferentially evenly distributed guide rib 510 of the inner sleeve 300 and the inward protruding step end face of the outer sleeve 200 are face to face, forming a top contact when pressed, thereby preventing the compression movement of the actuator 100.
[0036] In this embodiment, a step structure is provided inside the outer sheath 200, and the step structure forms a locking end face 210. When the rib 510 of the inner sheath 300 abuts against the locking end face 210, the outer sheath 200 and the outer sheath 200 are against each other, and the circumferential limiting mechanism 500 is locked to form a mechanical lock.
[0037] In the optional scheme of this embodiment, it is more preferred that one end of the outer sleeve 200 is a cover, a circular hole is set at the cover end to match the top sleeve 800, the cover is adjacent to the inner wall and axially evenly distributed with small drainage holes, and the inner wall of the cover is evenly distributed with multiple vertical ribs; the other end face of the outer sleeve 200 is provided with circumferentially evenly distributed notches, which is the notch end of the outer sleeve 200, and a step structure is set from the notch end of the outer sleeve 200 to the cover, and the middle step end face is the locking end face 210. After circumferential locking, the locking end face 210 and the contact end face of the convex rib 510 abut against each other.
[0038] In this embodiment, a plurality of fastening notches 002 are provided at one end of the outer sheath 200 close to the fastener 400 , and the fastener 400 is inserted into the fastening notches 002 .
[0039] In this embodiment, a locking groove 003 is further provided at one end of the outer sheath 200 close to the fastener 400 , and a snap ring 410 is provided on the fastener 400 . The snap ring 410 and the locking groove 003 are engaged with each other.
[0040] In the optional scheme of this embodiment, it is more preferred that there are multiple inward U-shaped notches on the notch end of the outer sheath 200, which cooperate with the multiple protrusions on the fastener 400 to circumferentially lock the fastener 400; a locking groove 003 is processed on the U-shaped notch and passes through the multiple notches, which cooperates with the retaining ring 410 on the fastener 400 to lock the axial position of the fastener 400.
[0041] In this embodiment, the outer sheath 200 is further provided with a plurality of guide grooves 004 , and the ribs 510 slide along the guide grooves 004 .
[0042] In the optional scheme of this embodiment, it is more preferred that the outer sheath 200 shell extends from one end of the cover to the step end face and has 4-6 concave-convex alternating entities evenly distributed circumferentially, and the groove facing the cavity is a guide groove 004; the step end face facing the notch end to the fastener 400 is a circular tube with an inner diameter greater than the outer diameter of the guide part of the inner sheath 300, so that the outer sheath 200 has rotational freedom when in the maximum extension position.
[0043] In this embodiment, the rubber-coated inner component 600 is a thermoplastic elastic colloid, and the rubber-coated inner component 600 is injection-molded on the inner wall of the fastener 400 .
[0044] In an alternative embodiment of this embodiment, the inner wall of the fastener 400 is preferably provided with an annular groove for a rubber-coated inner member 600, which is injection-molded with rubber. When the actuator 100 is used in a mobile vehicle, this effectively prevents abnormal driving noise. Furthermore, the left end of the inner sheath 300 has a square hole that fits over the rear end of the actuator 100 to limit rotation between the inner sheath 300 and the actuator 100.
[0045] In this embodiment, the inner sheath 300 is also provided with fine ribs 310, and a plurality of fine ribs 310 are evenly distributed circumferentially on the outer wall of the inner sheath 300. The free end of the inner sheath 300 is provided with a buffer rubber ring 700, and the buffer rubber ring 700 is arranged on the outside of the fine ribs 310. When the actuator 100 is contracted to the shortest position, the fastener 400 and the buffer rubber ring 700 are abutted.
[0046] In the optional scheme of this embodiment, it is more preferred that a plurality of arc-shaped fine ribs 310 are provided on the inner sheath 300, and the fine ribs 310 and the rubber-coated inner part 600 are in soft-hard contact during the sliding process, and a buffer rubber ring 700 is injection-molded at the end of the fine rib 310. When the actuator 100 is compressed to the end of the stroke, the inner hole of the fastener 400 and the buffer rubber ring 700 are in contact and form an interference fit, thereby achieving the effect of reducing noise during movement and alleviating movement impact.
[0047] In this embodiment, an actuator 100 and a push-up assembly 800 are included. The push-up assembly 800 is plugged into the end of the outer sheath 200 away from the fastener 400 . The actuator 100 passes through the push-up assembly 800 and enters the inner cavity of the outer sheath 200 .
[0048] Among the optional schemes of this embodiment, it is more preferred that the end face of one end of the top kit 800 is abutted against the end face of the ball socket, the inner hole step of the top kit 800 is provided to abut against the piston rod step of the actuator 100, and the other end of the top kit 800 is a sleeve with 2-4 notches evenly distributed around the circumference, and the sleeve is clamped in the circular hole at one end of the outer sleeve 200 with the bosses at the left and right ends, and the piston rod of the actuator 100 and the ball socket are fixed with threads and locking glue, and the threads and locking glue simultaneously constrain the top kit 800 on the piston rod.
[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A low-noise linear sliding sheath with mechanical end limit, characterized by: It includes an outer sheath (200), an inner sheath (300) and a fastener (400); The actuator (100) is inserted from one end of the outer sheath (200); the fastener (400) is plugged into the other end of the outer sheath (200); the inner sheath (300) is movably connected to the fastener (400); a rubber-coated inner part (600) is provided between the fastener (400) and the inner sheath (300); The fastener (400) and the inner sheath (300) are connected via a circumferential limiting mechanism (500), and the circumferential limiting mechanism (500) comprises a rib (510) provided on the inner sheath (300) and a limiting groove (001) provided on the fastener (400); The outer sheath (200) is rotated circumferentially so that the rib (510) enters the limiting groove (001), and the circumferential limiting mechanism (500) is locked.
2. The low-noise linear sliding sheath with mechanical end limit according to claim 1, characterized in that: The circumferential limiting mechanism (500) further comprises a locking strip (520) and a locking tongue (530) arranged on the fastener (400), wherein the limiting groove (001) is formed between the locking strip (520) and the locking tongue (530).
3. The low-noise linear sliding sheath with mechanical end limit according to claim 2, characterized in that: The locking strip (520) protrudes inward from the inner wall of the fastener (400); The locking tongue (530) is arranged in the notch of the fastener (400) and forms a cantilever structure, and the locking tongue (530) can be tilted up and pressed down in the radial direction.
4. The low-noise linear sliding sheath with mechanical end limit according to claim 3, characterized in that: A step structure is provided in the outer sheath (200), and the step structure forms a locking end surface (210); When the rib (510) of the inner sheath (300) abuts against the locking end surface (210), the outer sheath (200) and the outer sheath (200) are against each other, and the circumferential limiting mechanism (500) is locked, forming a mechanical lock.
5. The low-noise linear sliding sheath with mechanical end limit according to claim 4, characterized in that: A plurality of fastening notches (002) are provided at one end of the outer sheath (200) close to the fastener (400), and the fastener (400) is inserted into the fastening notches (002).
6. The low-noise linear sliding sheath with mechanical end limit according to claim 5, characterized in that: The outer sheath (200) is further provided with a locking groove (003) at one end close to the fastener (400); The fastener (400) is provided with a snap ring (410); The snap ring (410) and the locking groove (003) engage with each other.
7. The low-noise linear sliding sheath with mechanical end limit according to claim 6, characterized in that: The outer sheath (200) is further provided with a plurality of guide grooves (004); the ribs (510) slide along the guide grooves (004).
8. The low-noise linear sliding sheath with mechanical end limit according to claim 7, characterized in that: The rubber-coated inner part (600) is a thermoplastic elastic colloid; the rubber-coated inner part (600) is injection-molded on the inner wall of the fastener (400).
9. The low-noise linear sliding sheath with mechanical end limit according to claim 8, characterized in that: The inner sheath (300) is further provided with thin ribs (310), and a plurality of the thin ribs (310) are evenly distributed circumferentially on the outer wall of the inner sheath (300); A buffer rubber ring (700) is provided at the free end of the inner sheath (300), and the buffer rubber ring (700) is arranged outside the thin rib (310). When the actuator (100) is retracted to the shortest position, the fastener (400) and the buffer rubber ring (700) abut against each other.
10. A low-noise linear sliding sheath assembly comprising the end mechanical limiter according to any one of claims 1 to 9, characterized in that: The utility model comprises an actuator cylinder (100) and a top kit (800), wherein the top kit (800) is plugged into an end of the outer sleeve (200) away from the fastener (400), and the actuator cylinder (100) passes through the top kit (800) and enters the inner cavity of the outer sleeve (200).