CN216336096U - Multi-rod telescopic sleeve - Google Patents

Abstract

The utility model discloses a multi-rod telescopic sleeve, which comprises a fixing ring and at least three telescopic section rods, wherein a plurality of mounting holes for the telescopic section rods to penetrate through are uniformly formed in the fixing ring; the telescopic joint rod comprises a fixed joint, a middle joint and a tail joint; one end of the fixed joint is fixedly connected with the frame, and the other end of the fixed joint passes through the mounting hole and is fixedly connected with the fixed ring; a first sliding improvement mechanism is arranged on the inner side of one end of the fixed joint close to the fixed ring, and one end of the middle joint is slidably inserted into the fixed joint through the first sliding improvement mechanism; and a second sliding improvement mechanism is arranged on the inner side of the other end of the middle section, and one end of the tail section is slidably inserted into the middle section through the second sliding improvement mechanism. According to the utility model, multi-section sliding connection is realized through the plurality of telescopic section rods, the fixing ring and the sliding improvement mechanism, the sliding among the multi-sections is flexible, the fit clearance is small, the coaxiality is high, the equipment volume and the material consumption for preparing materials are reduced, and the structural stability and the positioning accuracy are effectively improved.

Description

Multi-rod telescopic sleeve

Technical Field

The utility model relates to the technical field of crane lifting appliances, in particular to a multi-rod telescopic sleeve.

Background

In the field of crane slings, a telescopic lifting device is a transport device which extends and retracts to some extent in a limited space and accurately carries or conveys an operating machine installed at the end of the device from a certain position to a target position. In the existing hoisting and transporting equipment, the telescopic hoisting device mostly adopts a combined form of a flexible steel wire rope, a pulley block and a hook group to operate, but due to the flexible influence of the steel wire rope, a heavy object can shake or even twist due to the horizontal inertia effect in the transporting process, so that the safety production is not facilitated, and the accurate positioning can not be realized.

Therefore, the prior art proposes a telescopic mechanism consisting of a rigid barrel part consisting of a plurality of telescopic sleeves, wherein adjacent sleeves are sequentially sleeved, and then a movable pulley is arranged in the most central sleeve to drive the plurality of sleeves to stretch and retract to complete transportation. However, adjacent sleeves are not provided with special connecting measures and only slide in a mutual contact manner, so that gaps among the sleeves are too large, the coaxiality is poor, the sleeves are easy to shake, and the positioning accuracy and the service life are influenced; in addition, in order to meet the requirements of sufficient rigidity and horizontal shearing resistance, the volume and the weight of the cylinder are large, the manufacturing material consumption is high, the burden of the hoisting machinery is additionally increased, and the economical practicability is not high.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a multi-rod telescopic sleeve with simple and stable structure, convenient and flexible operation and convenient transportation.

The utility model is realized by the following technical scheme:

a multi-rod telescopic sleeve comprises a fixing ring and at least three telescopic section rods, wherein the middle part of the fixing ring is provided with a through hole for a hoisting mechanism to pass through, and a plurality of mounting holes for the telescopic section rods to penetrate through are uniformly formed along the periphery of the through hole; the telescopic joint rod comprises a hollow fixed joint, a hollow middle joint and a tail joint; one end of the fixed joint is fixedly connected with the frame, and the other end of the fixed joint passes through the mounting hole and is fixedly connected with the fixed ring; one end of the fixed joint close to the fixed ring is provided with a first sliding improvement mechanism, and one end of the middle joint is inserted into the fixed joint in a sliding manner through the first sliding improvement mechanism; the other end of the middle section is provided with a second sliding improvement mechanism, and one end of the tail section is inserted in the middle section in a sliding mode through the second sliding improvement mechanism.

In one embodiment, the lengths of the fixed link, the intermediate link, and the tail link are equal; or the length of the middle section is slightly longer than that of the fixed section, and the length of the tail section is equal to that of the middle section; or the middle section is slightly longer than the fixed section, and the tail section is slightly longer than the middle section.

In one embodiment, the first slip improvement mechanism has a length of one quarter to one third of the length of the middle link; the length of the second slide improvement mechanism is one fourth to one third of the length of the tail section.

In one embodiment, the first sliding improvement mechanism and the second sliding improvement mechanism have the same structure and respectively comprise a shaft sleeve, a hollow inner baffle ring, a hollow outer baffle ring and two linear bearings; the two linear bearings are coaxially arranged, the relative inner sides of the two linear bearings are separated through the shaft sleeve, and the relative outer sides of the two linear bearings are fixed through the inner retaining ring and the outer retaining ring.

In one embodiment, the end part of one end of the middle section, which is positioned in the fixed section, is provided with a first convex edge, the middle section can slide outwards until the first convex edge is abutted against the inner retaining ring of the first sliding improvement mechanism, and the middle section is limited from sliding out of the fixed section by matching the first convex edge with the inner retaining ring of the first sliding improvement mechanism.

In one embodiment, the end part of one end of the tail section, which is positioned in the middle section, is provided with a second convex edge, the tail section can slide outwards until the second convex edge is abutted against an inner retaining ring of the second sliding improvement mechanism, and the tail section is limited from sliding out of the middle section by matching the second convex edge with the inner retaining ring of the second sliding improvement mechanism.

In one embodiment, the shaft sleeve of the second sliding improvement mechanism is a long shaft sleeve, and the length of the long shaft sleeve is greater than or equal to the total length of the two linear bearings.

In one embodiment, one end of the fixed joint, which is far away from the frame, is taken as a free end of the fixed joint, the free end is provided with a limiting edge and a limiting piece which are distributed on the upper side and the lower side of the fixed ring, the limiting edge is annularly arranged on the peripheral surface of the free end, and the outer diameter of the limiting edge is larger than the aperture of the mounting hole; the locating part detachably fixes the downside at solid fixed ring, and the spacing fender of cooperation is followed the location and is fixed solid fixed ring.

In one embodiment, a connecting screw thread is arranged on the outer peripheral surface of the free end, and the limiting member is in threaded connection with the free end.

In one embodiment, a cushion layer is disposed between the position-limiting member and the fixing ring.

Compared with the prior art, the technical scheme of the utility model at least has the following advantages and beneficial effects:

the utility model carries out telescopic transportation by the uniformly dispersed telescopic section rods and fixes the telescopic section rods by the fixing rings with a plurality of mounting holes, thereby reducing the equipment volume and the material consumption for preparing the material while meeting the requirement of high stability; and improve the mechanism through sliding and carry out the multisection section sliding connection of flexible festival pole, slip flexibility, fit clearance are little between the multisection section, and the axiality is high, have effectively improved structural stability and location precision.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of a multi-rod telescopic sleeve according to an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is an enlarged schematic view at B of FIG. 1;

fig. 4 is a cross-sectional view at C-C in fig. 1.

Icon: 1-telescopic joint rod, 11-fixed joint, 12-middle joint, 121-first convex edge, 13-tail joint, 131-second convex edge, 2-fixed ring, 21-through hole, 22-mounting hole, 3-first sliding improvement mechanism, 31-shaft sleeve, 32-inner baffle ring, 33-outer baffle ring, 34-linear bearing, 4-second sliding improvement mechanism, 51-limit baffle edge, 52-limit piece, 53-cushion layer, 6-lifting mechanism and 7-frame.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, a multi-rod telescopic sleeve will be described more clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. The drawings show preferred embodiments of the multi-rod telescopic sleeve, however, the multi-rod telescopic sleeve may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, when used in reference to an orientation or positional relationship as indicated in the figures, or as would normally be placed in use of the utility model, are used solely to facilitate the description and simplicity of illustration, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered as limiting.

In the description of the present invention, it should be further noted that the terms "disposed," "mounted," "connected," and "connected" used herein should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 4, an embodiment of the present invention provides a multi-rod telescopic sleeve, which includes a fixed ring 2 and at least three telescopic rods 1, in this embodiment, four telescopic rods 1 are used for description; the middle part of the fixed ring 2 is provided with a through hole 21 for the hoisting mechanism 6 to pass through, a plurality of mounting holes 22 for the telescopic section rods 1 to penetrate through are uniformly arranged along the periphery of the through hole 21, and the telescopic section rods 1 penetrate through the mounting holes 22 and then are uniformly distributed around the through hole 21, so that the horizontal stress is balanced when the multi-rod hoisting is carried out; the telescopic rod 1 comprises a hollow fixed joint 11, a hollow middle joint 12 and a tail joint 13; one end of the fixed joint 11 is fixedly connected with the frame 7 or fixedly connected with the frame 7 through a mounting disc, the connection mode can adopt a bolt connection mode, and the other end of the fixed joint passes through the mounting hole 22 and is fixedly connected with the fixed ring 2; a first sliding improvement mechanism 3 is arranged at one end of the fixed joint 11 close to the fixed ring 2, and is specifically arranged at the inner side of the cylinder wall of the fixed joint 11, and one end of the intermediate joint 12 is slidably inserted into the fixed joint 11 through the first sliding improvement mechanism 3 and is coaxially and slidably connected with the fixed joint 11, and at the moment, the intermediate joint 12 can slide in the fixed joint 11 with high coaxiality and high flexibility; the other end of the middle section 12 is provided with a second sliding improvement mechanism 4 which is specifically arranged on the inner side of the cylinder wall of the middle section 12, and one end of the tail section 13 is slidably inserted into the middle section 12 through the second sliding improvement mechanism 4 and is coaxially and slidably connected with the middle section 12; at the moment, the tail section 13 can slide in the middle section 12 with high coaxiality and high flexibility, a lifting appliance is fixed at the other end of the tail section 13, the lifting mechanism 6 drives the tail section 13 to move up and down for lifting and transporting, and the transporting process is stable and flexible.

Furthermore, the relative lengths of the fixed joint 11, the middle joint 12 and the tail joint 13 can be designed to be equal, so that the three can be conveniently and uniformly stored, most of the middle joint 12 and the tail joint 13 can be stored in the fixed joint 11, and the space occupation is reduced; of course, the relative lengths of the fixed link 11, the intermediate link 12 and the tail link 13 may be designed such that the length of the intermediate link 12 is slightly longer than that of the fixed link 11, and the length of the tail link 13 is equal to that of the intermediate link 12, wherein the slightly longer length is quantified such that the length of the intermediate link 12 exceeds the length of the fixed link 11, but the excess portion does not exceed one fifth of that of the fixed link 11, which also meets the aforementioned purpose of reducing the space occupation and facilitates the removal of the intermediate link 12; alternatively, the relative lengths of the fixed link 11, the intermediate link 12 and the tail link 13 may be designed such that the intermediate link 12 is slightly longer than the fixed link 11 and the tail link 13 is slightly longer than the intermediate link 12. The aforementioned purpose of reducing the space occupation can be satisfied and the removal of the intermediate link 12 and the tail link 13 can be facilitated.

Furthermore, the length of the first sliding improvement mechanism 3 can be designed to be one fourth to one third of the length of the middle joint 12, so that a part of vertical section of the middle joint 12 is reserved in the fixed joint 11, and the transverse shear stress at the joint of the middle joint and the fixed joint is dispersed, thereby effectively reducing the horizontal inertia force and ensuring the coaxiality, the verticality and the stability of the middle joint 12 and the fixed joint 11; the length of the second sliding part improving mechanism is designed to be one fourth to one third of the length of the tail section 13, so that a part of vertical section of the tail section 13 is reserved in the middle section 12, and the transverse shear stress at the joint of the tail section and the middle section is dispersed, so that the horizontal inertia force is effectively reduced, and the coaxiality, the verticality and the stability of the tail section 13 and the middle section 12 are ensured.

Further, as shown in fig. 1 to 3, the first sliding improvement mechanism 3 and the second sliding improvement mechanism 4 have the same structure, and each of them includes a shaft sleeve 31, a hollow inner retainer 32, a hollow outer retainer 33 and two linear bearings 34; the two linear bearings 34 are coaxially arranged, the two linear bearings 34 are separated by the shaft sleeve 31 at the opposite inner sides, and the two linear bearings 34 are fixed at the opposite outer sides by the inner retaining ring 32 and the outer retaining ring 33, at this time, the outer ring of the linear bearing 34 of the first sliding improvement mechanism 3 is abutted against the inner wall of the fixed joint 11, and the inner ring is abutted against the outer wall of the intermediate joint 12; the outer ring of the linear bearing 34 of the second sliding motion improvement mechanism 4 abuts against the inner wall of the intermediate joint 12, and the inner ring abuts against the outer wall of the tail joint 13; the sliding flexibility can be obviously improved through the linear bearing 34, the gap between the cylinders can be reduced, the arrangement of the linear bearing 34 is separated through the shaft sleeve 31, the effective sliding contact length of the sliding improvement mechanism and the wall to be contacted can be prolonged, the use number of the linear bearing 34 is reduced, and the purpose of reducing the manufacturing cost is achieved.

Further, as shown in fig. 2, the end of the middle section 12 at the end inside the fixed section 11 is provided with a first protruding edge 121, the middle section 12 can slide outwards until the first protruding edge 121 abuts against the inner retaining ring 32 of the first sliding improvement mechanism 3, and the first protruding edge 121 is matched with the inner retaining ring 32 of the first sliding improvement mechanism 3, so that the middle section 12 is limited from sliding out of the fixed section 11. Similarly, as shown in fig. 3, the end of the tail section 13 at the end inside the middle section 12 is also provided with a second protruding edge 131, and the tail section 13 can slide outwards until the second protruding edge 131 abuts against the inner stop ring 32 of the second sliding improvement mechanism 4, and the second protruding edge 131 is matched with the inner stop ring 32 of the second sliding improvement mechanism 4, so that the tail section 13 is limited from sliding out of the middle section 12.

Further, as shown in fig. 3, in order to satisfy the requirement of multi-segment coaxial insertion, the outer diameter of the middle segment 12 is usually smaller than the inner diameter of the fixed segment 11, and the outer diameter of the tail segment 13 is also usually smaller than the inner diameter of the middle segment 12, so when the outer diameter of the tail segment 13 becomes smaller, in order to satisfy higher sliding flexibility and barrel clearance, the linear bearings 34 used are also correspondingly reduced in volume, so the shaft sleeve 31 of the second sliding improvement mechanism 4 is a long shaft sleeve 31, the length of which is greater than or equal to the total length of the two linear bearings 34, the effective sliding contact length of the second sliding improvement mechanism 4 and the wall to be contacted is extended, thereby reducing the number of the linear bearings 34 used, and achieving the purpose of reducing the manufacturing cost.

Further, as shown in fig. 1, one end of the fixed link 11, which is far away from the frame 7, is used as a free end of the fixed link 11, the free end is provided with a limiting edge 51 and a limiting piece 52 which are distributed on the upper side and the lower side of the fixed ring 2, the limiting edge 51 is annularly arranged on the outer peripheral surface of the free end, and the outer diameter of the limiting edge is larger than the aperture of the mounting hole 22; the limiting member 52 is detachably fixed on the lower side of the fixing ring 2, and is matched with the limiting stop edge 51 to fix the fixing ring 2. After the fixing ring 2 passes through the fixing section 11 from bottom to top, the upper side surface of the fixing ring is limited and positioned by the limiting blocking edge 51, then the limiting piece 52 is installed on the lower side surface of the fixing ring 2, the limiting piece 52 can be fixedly connected with the limiting blocking edge 51 or the fixing section 11, and at the moment, the fixing ring 2 is clamped and fixed between the limiting blocking edge 51 and the limiting piece 52, so that the fixing ring 2 and the fixing section 11 are fixed to each other.

Furthermore, the outer peripheral surface of the free end of the fixed joint 11 is provided with a connecting thread, and the limiting member 52 is in threaded connection with the free end, so that the operation is convenient and fast. The circumferential surface of the limiting member 52 can be uniformly provided with anti-slip grooves, so that an operator can conveniently and quickly fix the limiting member 52 on the free end of the fixed joint 11 by screwing.

Further, as shown in fig. 1 and 2, a cushion layer 53 is disposed between the limiting member 52 and the fixing ring 2, and the cushion layer 53 is preferably made of rubber, so as to play a role of anti-slip and shock absorption, and reduce rigid contact wear between the fixing ring 2 and the limiting member 52.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A multi-rod telescopic sleeve is characterized by comprising a fixing ring and at least three telescopic section rods, wherein the middle part of the fixing ring is provided with a through hole for a hoisting mechanism to pass through, and a plurality of mounting holes for the telescopic section rods to penetrate through are uniformly formed along the periphery of the through hole; the telescopic joint rod comprises a hollow fixed joint, a hollow middle joint and a tail joint; one end of the fixed joint is fixedly connected with the frame, and the other end of the fixed joint penetrates through the mounting hole and is fixedly connected with the fixed ring; one end of the fixed joint close to the fixed ring is provided with a first sliding improvement mechanism, and one end of the middle joint is inserted into the fixed joint in a sliding manner through the first sliding improvement mechanism; the other end of the middle section is provided with a second sliding improvement mechanism, and one end of the tail section is slidably inserted into the middle section through the second sliding improvement mechanism.

2. The multiple rod telescoping sleeve of claim 1, wherein said fixed, intermediate and tail sections are of equal length; or the length of the middle section is slightly longer than that of the fixed section, and the length of the tail section is equal to that of the middle section; or the length of the middle section is slightly longer than that of the fixed section, and the length of the tail section is slightly longer than that of the middle section.

3. The multiple rod telescoping sleeve of claim 2, wherein said first slip improvement mechanism is one quarter to one third the length of said intermediate link; the length of the second slip improvement mechanism is one quarter to one third of the length of the tail section.

4. The multi-rod telescopic sleeve as claimed in any one of claims 1 to 3, wherein the first and second sliding improvement mechanisms have the same structure and each include a shaft sleeve, a hollow inner retainer ring, a hollow outer retainer ring and two linear bearings; the two linear bearings are coaxially arranged, the relative inner sides of the two linear bearings are separated through the shaft sleeve, and the relative outer sides of the two linear bearings are fixed through the inner retaining ring and the outer retaining ring.

5. The multi-rod telescopic sleeve of claim 4, wherein a first protruding edge is arranged at an end of the middle section located at one end of the fixed section, the middle section can slide outwards until the first protruding edge abuts against an inner retaining ring of the first sliding improvement mechanism, and the middle section is limited from sliding out of the fixed section by matching the first protruding edge with the inner retaining ring of the first sliding improvement mechanism.

6. The multi-rod telescopic sleeve of claim 4, wherein a second protruding edge is arranged at an end of the tail section located at one end of the middle section, the tail section can slide outwards until the second protruding edge abuts against an inner retaining ring of the second sliding improvement mechanism, and the tail section is limited from sliding out of the middle section by matching the second protruding edge with the inner retaining ring of the second sliding improvement mechanism.

7. The multiple rod telescoping sleeve of claim 6, wherein said second slip improvement mechanism sleeve is a long shaft sleeve having a length greater than or equal to the total length of said two linear bearings.

8. The multi-rod telescopic sleeve of claim 1, wherein one end of the fixed link, which is far away from the frame, is a free end of the fixed link, the free end is provided with a limit stop edge and a limit piece which are distributed on the upper side and the lower side of the fixed ring, the limit stop edge is annularly arranged on the outer peripheral surface of the free end, and the outer diameter of the limit stop edge is larger than the aperture of the mounting hole; the locating part detachably fixes the downside of solid fixed ring, cooperates the spacing fender is followed the location and is fixed gu fixed ring.

9. The multiple-rod telescopic sleeve of claim 8, wherein a connecting screw thread is provided on an outer peripheral surface of the free end, and the stopper is screw-connected to the free end.

10. The multiple-rod telescopic socket according to claim 8, wherein a cushion layer is provided between the stopper and the fixing ring.

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