Elastic compensation type expansion sleeve

Abstract

The utility model relates to the technical field of expansion sleeves, in particular to an elastic compensation type expansion sleeve which comprises an outer ring sleeve and inner ring sleeves, and a plurality of inner ring sleeves are arranged in the outer ring sleeve in a sleeved mode. The inner ring sleeve comprises a sub sleeve body and an expansion piece, the sub sleeve body is arranged in the inner ring sleeve in a sliding mode, the sliding direction of the sub sleeve body is consistent with the axial direction of the outer ring sleeve, the expansion piece is arranged at the end, close to the inner ring sleeve, of the sub sleeve body, and the expansion piece abuts against the expansion end of the inner ring sleeve. The plurality of sub-sleeve bodies are uniformly and circumferentially arranged in the outer ring sleeve, and an elastic assembly is connected between every two adjacent sub-sleeve bodies. A mounting disc is arranged at the end, close to the sub-sleeve body, of the outer ring sleeve, a limiting assembly is arranged on the mounting disc, and the limiting end of the limiting assembly abuts against the sliding end, away from the outer ring sleeve, of the sub-sleeve body. According to the utility model, the technical problems of carrying out elastic compensation to reduce abrasion and avoiding expansion failure during expansion of the expansion sleeve are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of expansion sleeve, specifically to an elastic compensation type expansion sleeve. BACKGROUND

[0002] The expansion sleeve is a keyless coupling device, and its principle is to generate a large gripping force between the inner ring and the shaft and between the outer ring and the hub through the action of a high-strength tension bolt, thereby realizing the keyless coupling of the machine part and the shaft. When bearing a load, the torque, axial force or combined load of the two is transmitted by the combined pressure of the expansion sleeve and the machine part and shaft and the friction force generated thereby.

[0003] When the existing expansion sleeve is expanded, the multiple bolt pieces on the expansion sleeve need to be manually tightened one by one. During the tightening process, due to the different stress points of the expansion sleeve, the expansion sleeve may be slightly skewed or even stuck during the expansion process, affecting the coaxiality between the shaft and the hub, causing greater wear and tear, shortening the service life of the expansion sleeve. Moreover, when expanding heavy equipment, the large vibration may cause the threaded connection to fail, leading to the failure of the expansion sleeve to detach and causing safety accidents.

[0004] The utility model discloses a kind of composite material's elastic expansion sleeve support locking mechanism, and the patent with the utility model name of "a composite material's elastic expansion sleeve support locking mechanism" and the announcement number of CN220769992U has been disclosed, and the utility model includes outer ring sleeve, outer ring sleeve interior is provided with inner ring sleeve, inner ring sleeve interior is provided with conical block, outer ring sleeve top is provided with through hole.The utility model avoids the problem that the head of the inner hexagonal bolt can be adhered by impurities or dirt during long-term use of the elastic expansion sleeve, thereby affecting subsequent use thereof, and also avoids the problem that the elastic expansion sleeve may fail under high-strength working conditions.

[0005] Although the utility model can avoid the problem of expansion sleeve failure, during expansion and locking, the inner and outer ring sleeves are still prone to relative displacement, increasing the degree of wear and tear. UTILITY MODEL CONTENTS

[0006] The purpose of the present application is to provide an elastic compensation type expansion sleeve that solves the technical problem of reducing wear and tear and avoiding expansion failure during expansion of the expansion sleeve.

[0007] To solve the above technical problems, the application adopts the following solutions:

[0008] An elastic compensation type expansion sleeve includes an outer ring sleeve and an inner ring sleeve.

[0009] Preferably, the outer ring sleeve is provided with a plurality of inner ring sleeves.

[0010] Preferably, the inner ring sleeve comprises a sleeve body and an expansion piece, the sleeve body is slidingly arranged in the inner ring sleeve, the sliding direction is consistent with the axial direction of the outer ring sleeve, the sleeve body is provided with the expansion piece at one end close to the inner ring sleeve, and the expansion piece abuts against the expansion end of the inner ring sleeve.

[0011] Preferably, the plurality of sleeve bodies are uniformly arranged in the circumferential direction in the outer ring sleeve, and the elastic assembly is connected between adjacent sleeve bodies.

[0012] Preferably, the outer ring sleeve is provided with a mounting disc at one end close to the sleeve body, the mounting disc is provided with a limiting assembly, and the limiting end of the limiting assembly abuts against the sliding end of the sleeve body away from the outer ring sleeve.

[0013] Preferably, the outer ring sleeve comprises a sleeve, the sleeve wall of the sleeve is fixedly provided with an inclined block, the inclined block slidingly abuts against the expansion piece, the inclined surface of the inclined block slidingly abuts against the surface of the expansion piece, and a plurality of slotting holes are formed in the sleeve wall along the length direction of the sleeve.

[0014] Preferably, the mounting disc comprises a flange disc, the flange disc is coaxially fixedly arranged at one end of the sleeve, a circular groove is formed in the inside of the flange disc, and the outermost edge of the sleeve body abuts against the inner wall of the circular groove.

[0015] Preferably, the sleeve body is slidingly provided with a bolt one along the length direction of the sleeve, the threaded end of the bolt one is matchedly connected with a threaded hole one, and the threaded hole one is arranged on the groove bottom surface of the circular groove.

[0016] Preferably, the elastic assembly comprises a spring and a diaphragm.

[0017] Preferably, the diaphragm is fixedly connected with the spring on both sides, and each spring is fixedly connected with the side wall of the sleeve body on the side of the diaphragm.

[0018] Preferably, the limiting assembly comprises an annular diaphragm, the annular diaphragm is slidingly provided with a bolt two along the length direction of the sleeve, the threaded end of the bolt two is matchedly connected with a threaded hole three, and the threaded hole three is arranged on the flange disc.

[0019] Preferably, the outer edge of the flange disc is provided with an annular groove, the annular diaphragm is slidingly arranged in the annular groove, the sliding direction is consistent with the length direction of the sleeve, and the inner annular surface of the annular diaphragm abuts against the sliding end surface of the sleeve body away from the sleeve.

[0020] Preferably, at least one layer of annular diaphragm is arranged in the annular groove.

[0021] The technical scheme has at least the following advantages and beneficial effects:

[0022] In the utility model, a plurality of independent inner ring sleeves are arranged in the outer ring sleeve, so that when the single inner ring sleeve is locked and expanded, the displacement of the inner ring sleeve does not affect other inner ring sleeves, the overall coaxiality of the strokes of the plurality of inner ring sleeves is ensured, and deviation is avoided.

[0023] In the utility model, the elastic assembly is arranged between the adjacent inner ring sleeves, the overall shape of the plurality of inner ring sleeves is ensured by the elastic assembly, and the single inner ring sleeve is prevented from being deflected along the wall surface in the whole sleeve inner wall, so that the phenomenon that the expansion piece deviates and cannot be attached to the inclined surface of the inclined block is avoided.

[0024] In the utility model, the limiting assembly is arranged outside the whole inner ring sleeve, the sliding end of all the inner ring sleeves is limited and fixed, the threaded locking end of the inner ring sleeve is prevented from being invalid, and the expansion piece is prevented from being separated from the sliding to cause the expansion invalidation. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure schematic view of the utility model.

[0026] Figure 2 It is the sectional structure schematic view in the utility model.

[0027] Figure 3 It is the sectional structure schematic view of the inner ring sleeve in the utility model.

[0028] Figure 4 It is the sectional structure schematic view of the outer ring sleeve in the utility model.

[0029] Figure 5 It is the front view structure schematic view of the utility model.

[0030] Figure 6 It is the sectional structure schematic view of the limiting assembly in the utility model.

[0031] In the drawing, 1 is an outer ring sleeve, 101 is a sleeve, 102 is a slotted, 103 is an inclined block, 2 is a mounting disc, 201 is a flange plate, 202 is a circular groove, 203 is a ring groove, 3 is an inner ring sleeve, 301 is a sub-sleeve body, 302 is an expansion piece, 303 is a bolt piece one, 304 is a threaded hole one, 305 is a threaded hole two, 4 is an elastic assembly, 401 is a spring, 402 is a diaphragm, 5 is a limiting assembly, 501 is a ring diaphragm, 502 is a bolt piece two, 503 is a threaded hole three. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] It should be noted that similar reference numerals and letters refer to like items in the accompanying drawings, and once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings. The terms "center", "upper", "lower", "inner", "outer", and the like, which indicate the orientation or position relationship based on the positions or orientation relationships shown in the drawings, or the orientation or position relationship when the product of the application is used, are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. It should also be noted that unless otherwise specified and limited, the terms "provided", "installed", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0034] Embodiment

[0035] Please refer to Figures 1-6 The utility model provides a kind of elastic compensation type expansion sleeve, including outer ring 1, mounting disc 2, inner ring 3, elastic component 4, limiting component 5.

[0036] Further, the outer ring 1 is provided with a plurality of inner rings 3, and the adjacent inner rings 3 are provided with elastic components 4.

[0037] Preferably, when the inner ring 3 is displaced relative to the outer ring 1, the expansion outer diameter of the outer ring 1 and the expansion inner diameter of the inner ring 3 are both reduced accordingly, thereby simultaneously expanding and fixing the shaft assembly and the outer ring assembly. By providing a plurality of separate inner ring assemblies and connecting them with elastic components 4, when locking the inner ring 3, the single inner ring 3 will be displaced when locked, and the displacement of the remaining inner rings 3 will be offset by the elastic displacement of the elastic components 4, thereby avoiding the phenomenon of locking one end and causing the shaft assembly to deviate in the prior art when the inner ring 3 is displaced as a whole.

[0038] Please refer to Figures 1-4 In this embodiment, the outer ring 1 includes a sleeve 101, a slot 102, and an inclined block 103.

[0039] The inner ring 3 includes a sub-sleeve body 301, an expansion piece 302, a bolt member 303, a threaded hole 304, and a threaded hole 305.

[0040] Specifically, the sleeve 101 is internally provided with a barrel mouth, and an inclined block 103 is fixedly arranged on the barrel wall of the barrel mouth of the sleeve 101, so that the inner wall of the sleeve 101 becomes an inclined surface, and an expansion piece 302 is slidingly arranged on the inclined surface of the inclined block 103. The expansion piece 302 slides along the length direction of the sleeve 101, and a plurality of slots 102 are arranged through the barrel wall of the sleeve 101 along the length direction of the sleeve 101.

[0041] When the expansion piece 302 slides towards the sleeve 101, the expansion piece 302 abuts against the inclined block 103 and exerts a force on the inclined surface of the inclined block 103, so that the expansion piece 302 shrinks towards the inside of the sleeve 101, the barrel wall of the sleeve 101 connected with the inclined block 103 is expanded towards the outside of the sleeve 101, the expansion piece 302 abuts against the shaft assembly, and the outer wall of the sleeve 101 abuts against the outer ring assembly, so that the shaft assembly and the outer ring assembly are expanded and fixed.

[0042] The end of the expansion piece 302 away from the sleeve 101 is fixedly connected with a sub-sleeve body 301, and the sub-sleeve body 301 is slidingly arranged in the mounting disc 2 and slides along the same length direction as the sleeve 101. A plurality of sub-sleeve bodies 301 are uniformly arranged in the circumference of the sleeve 101, and the adjacent sub-sleeve bodies 301 are connected with elastic assemblies 4.

[0043] Please refer to Figures 2-5 In the embodiment, the mounting disc 2 includes a flange plate 201, a circular groove 202, and an annular groove 203.

[0044] The elastic assembly 4 includes springs 401 and a diaphragm 402.

[0045] Specifically, the flange plate 201 is coaxially fixedly arranged at one end of the sleeve 101 close to the sub-sleeve body 301, the circular groove 202 is arranged in the inside of the flange plate 201, and the inner wall of the circular groove 202 abuts against the outermost edge of the sub-sleeve body 301, so that the sub-sleeve body 301 slides in the circular groove 202 along the length direction of the sleeve 101.

[0046] The sub-sleeve body 301 is provided with a bolt member 303 slidingly arranged along the length direction of the sleeve 101, the threaded end of the bolt member 303 is matched and connected with a threaded hole 304, and the threaded hole 304 is arranged on the groove bottom surface of the circular groove 202. When the bolt member 303 is tightened, the bolt member 303 drives the expansion piece 302 on the sub-sleeve body 301 to slide towards the sleeve 101, so as to realize the expansion function.

[0047] The diaphragm 402 of the elastic assembly 4 is fixedly connected with the springs 401 on both sides, and each spring 401 is fixedly connected with the side wall of the sub-sleeve body 301 on the side of the diaphragm 402.

[0048] Each side of the diaphragm 402 is provided with at least four springs 401, which are respectively arranged at the four ends of the diaphragm 402.

[0049] Preferably, the prior art whole inner ring sleeve 3 is separated and arranged, when the bolt member one 303 is manually twisted, the corresponding sleeve body 301 of the bolt member one 303 is slid, and after the sleeve body 301 slides, the elastic bending of the spring 401 can offset the displacement of the sleeve body 301, avoid affecting other sleeve bodies 301, causing corresponding displacement of other sleeve bodies 301, and affecting the coaxial positioning of the sleeve body 301 to the shaft assembly.

[0050] The diaphragm 402 arranged between the springs 401 can increase the elastic force of the spring 401, and can also utilize the force of the diaphragm 402 when it is bent, to avoid the sleeve body 301 from being easily inclined along the wall surface in the inner wall of the sleeve 101 when it is only acted on by the spring 401, causing the expansion piece 302 to deviate and unable to be attached to the inclined surface of the inclined block 103.

[0051] In addition, the sleeve body 301 also has a threaded hole two 305 penetrating along the length direction of the sleeve 101, since the expansion piece 302 on the sleeve body 301 is expanded and tightened with the inner wall of the sleeve 101 by the bolt member one 303, it is difficult to be separated due to the expansion force, so the bolt member one 303 is twisted out of the threaded hole one 304 and twisted into the threaded hole two 305, at this time, the threaded end is in abutment with the groove bottom surface of the circular groove 202 and applies a force, so that the expansion piece 302 on the sleeve body 301 is separated from the sleeve 101.

[0052] Further, the mounting disc 2 is provided with a limiting assembly 5, which limits the inner ring sleeve 3 after expansion, to avoid the bolt member one 303 from being separated from the threaded hole one 304 due to the large load and strong vibration of some heavy equipment, causing the expansion piece 302 to be loose and lose the expansion function under long-term work.

[0053] Please refer to Figure 5 and Figure 6 In the embodiment, the limiting assembly 5 includes an annular diaphragm 501, a bolt member two 502, and a threaded hole three 503.

[0054] Specifically, the annular diaphragm 501 is slidably provided with the bolt member two 502 along the length direction of the sleeve 101, the threaded end of the bolt member two 502 is matched and connected with the threaded hole three 503, the threaded hole three 503 is arranged on the flange disc 201, the outer edge of the flange disc 201 is provided with a ring groove 203, the annular diaphragm 501 is slidably arranged in the ring groove 203, the sliding direction is consistent with the length direction of the sleeve 101, and the inner annular surface of the annular diaphragm 501 is in abutment with the sliding end surface of the sleeve body 301 away from the sleeve 101.

[0055] When the sub sleeve body 301 is twisted by the bolt member one 303, the expansion sheet 302 on the sub sleeve body 301 is expanded, at this time, the annular diaphragm 501 is manually sleeved in the annular groove 203, the annular diaphragm 501 is abutted at the sliding end of the sub sleeve body 301 by using the threaded locking of the bolt member two 502, and the sub sleeve body 301 is limited.

[0056] Wherein, the bolt member two 502 is located outside the annular diaphragm 501, the inner ring of the annular diaphragm 501 is abutted with the sub sleeve body 301, the annular diaphragm 501 itself is thin and has bending performance, when the threaded locking of the bolt member one 303 is failed and the expansion sheet 302 is out, the sub sleeve body 301 exerts force on the annular diaphragm 501, and the elastic diaphragm 402 uses the interaction force when the elastic diaphragm 402 is bent by the force, so that the elastic diaphragm 402 is not easily broken, and the sub sleeve body 301 is difficult to continue to slide out, the expansion function is maintained, and the safety is ensured.

[0057] In addition, at least one layer of the annular diaphragm 501 is arranged in the annular groove 203, when the threaded locking of the bolt member one 303 is failed due to the expansion of heavy equipment, the expansion sheet 302 is subjected to large extrusion force when sliding out, and the single layer of the annular diaphragm 501 is difficult to maintain the limiting, therefore, the number of layers of the annular diaphragm 501 can be manually increased, the bearing capacity of the limiting assembly 5 is improved, and the annular diaphragm 501 is not easily broken.

[0058] So far, the embodiments of the utility model have been described in detail. In order to avoid shielding the concept of the utility model, some details known in the art are not described. According to the above description, those skilled in the art can fully understand how to implement the technical scheme of the utility model, and the scope of the utility model is limited by the appended claims.

Claims

1. An elastic compensating expansion sleeve comprising an outer ring (1) and an inner ring (3), characterized in that ； The outer ring sleeve (1) is sleeved with a plurality of inner ring sleeves (3); The inner ring sleeve (3) comprises a sleeve body (301) and an expansion sheet (302), the sleeve body (301) is slidingly arranged in the inner ring sleeve (3), the sliding direction is consistent with the axial direction of the outer ring sleeve (1), the sleeve body (301) is provided with the expansion sheet (302) at one end close to the inner ring sleeve (3), and the expansion sheet (302) abuts against the expansion end of the inner ring sleeve (3); The plurality of sleeve bodies (301) are uniformly circumferentially arranged in the outer ring sleeve (1), and the elastic assembly (4) is connected between adjacent sleeve bodies (301). The outer ring sleeve (1) is provided with a mounting disc (2) at one end close to the sleeve body (301), the mounting disc (2) is provided with a limiting assembly (5), and the limiting end of the limiting assembly (5) abuts against the sliding end of the sleeve body (301) away from the outer ring sleeve (1).

2. An elastic compensating expansion sleeve as claimed in claim 1, characterized in that The outer ring sleeve (1) comprises a sleeve (101), the sleeve wall of the sleeve (101) is fixedly provided with an inclined block (103), the inclined block (103) slidingly abuts against the expansion sheet (302), the inclined surface of the inclined block (103) slidingly abuts against the surface of the expansion sheet (302), and a plurality of slotting (102) are formed in the sleeve wall of the sleeve (101) along the length direction of the sleeve (101).

3. The elastic compensating expander sleeve as claimed in claim 1, wherein The mounting disc (2) comprises a flange disc (201), the flange disc (201) is coaxially and fixedly arranged at one end of the sleeve (101), a circular groove (202) is formed in the inside of the flange disc (201), and the inner wall of the circular groove (202) abuts against the outermost edge of the sleeve body (301). The sleeve body (301) is slidingly provided with a bolt member (303) along the length direction of the sleeve (101), the threaded end of the bolt member (303) is matched and connected with a threaded hole (304), and the threaded hole (304) is arranged on the groove bottom surface of the circular groove (202).

4. The elastic compensating expander sleeve as claimed in claim 1, wherein The elastic assembly (4) comprises a spring (401) and a diaphragm (402); The diaphragm (402) is fixedly connected with the spring (401) on both sides, and each spring (401) is fixedly connected with the side wall of the sleeve body (301) adjacent to the diaphragm (402).

5. The elastic compensating expander sleeve as claimed in claim 1, wherein, The limiting assembly (5) comprises an annular diaphragm (501), the annular diaphragm (501) is provided with a bolt member (502) along the length direction of the sleeve (101), the threaded end of the bolt member (502) is matched and connected with a threaded hole (503), and the threaded hole (503) is arranged on the flange disc (201); The outer edge of the flange disc (201) is provided with a ring groove (203), the annular diaphragm (501) is slidingly arranged in the ring groove (203), the sliding direction is consistent with the length direction of the sleeve (101), and the inner annular surface of the annular diaphragm (501) abuts against the sliding end surface of the sleeve body (301) away from the sleeve (101).

6. An elastic, compensating expansion sleeve as defined in claim 5, wherein At least one layer of annular diaphragm (501) is arranged in the ring groove (203).

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