CN111536123A

CN111536123A - Telescopic rod

Info

Publication number: CN111536123A
Application number: CN202010348827.7A
Authority: CN
Inventors: 韦坚; 徐建华
Original assignee: Xi'an Alite Aviation Technology Co ltd
Current assignee: Xi'an Alite Aviation Technology Co ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-08-14

Abstract

The invention discloses a telescopic rod which comprises an outer sleeve and an inner tube which are coaxially arranged, wherein the rear end of the inner tube is connected with the front end of the outer sleeve in a sliding manner through a connecting piece, and the inner tube is fixedly connected with the connecting piece; the rear part of the connecting piece is positioned in the inner cavity of the outer sleeve, the front part of the connecting piece is positioned in the inner cavity of the inner tube, the rear part of the connecting piece is provided with a second accommodating part, the outer sleeve is provided with a through hole at the position corresponding to the second accommodating part, and the accommodating part and the through hole are internally provided with a positioning ball; the front end of the outer sleeve is sleeved with a locking mechanism, and a first accommodating part is arranged on the contact surface of the locking mechanism and the outer sleeve; realize the position switching of location ball through first portion, the second portion of holding and through-hole, and then realize the inner tube and stretch out and draw back and lock in the outer sleeve pipe, still increased the firm degree of telescopic link through connecting piece and locking mechanism.

Description

Telescopic rod

Technical Field

The invention belongs to the technical field of telescopic devices, and particularly relates to a telescopic rod.

Background

In daily life and industrial production, often can use the telescopic link, the telescopic link generally links together for one or several shaft-like spare, and other parts are connected respectively at both ends, through flexible locking structure, can carry out length and stretch out and draw back, and automatic locking after reaching design length prevents to shrink in the use. The locking function and the telescopic function of the telescopic rod are realized by one or more locking structures.

However, the common telescopic rod is limited by cost, has a simple locking structure, is not firm enough and is difficult to apply to application scenes with high requirements on firmness.

Disclosure of Invention

The invention aims to provide a telescopic rod, which can improve the firmness of the telescopic rod through a simple locking structure.

The invention adopts the following technical scheme: a telescopic rod comprises an outer sleeve and an inner tube which are coaxially arranged, wherein the rear end of the inner tube is connected with the front end of the outer sleeve in a sliding manner through a connecting piece, and the inner tube is fixedly connected with the connecting piece;

the rear part of the connecting piece is positioned in the inner cavity of the outer sleeve, the front part of the connecting piece is positioned in the inner cavity of the inner tube, the rear part of the connecting piece is provided with a second accommodating part, the position of the outer sleeve corresponding to the second accommodating part is provided with a through hole, and the accommodating part and the through hole are internally provided with a positioning ball;

the front end of the outer sleeve is sleeved with a locking mechanism, and a first accommodating part is arranged on the contact surface of the locking mechanism and the outer sleeve;

the locking mechanism is used for moving along the axial direction of the outer sleeve, when the first accommodating part is overlapped with the positioning ball in position and external force acts on the outer sleeve or the inner pipe, the positioning ball is separated from the second accommodating part and enters the first accommodating part and the through hole, and then the inner pipe moves relative to the outer sleeve.

Furthermore, the locking mechanism comprises a tubular locking sleeve sleeved on the outer sleeve, a cavity is formed between the inner wall of the locking sleeve and the outer wall of the outer sleeve, an elastic part parallel to the axial direction of the outer sleeve is arranged at the rear end of the cavity, and the front end of the elastic part is connected with a locking ring;

the locking ring is sleeved outside the outer sleeve and is fixedly connected with the locking sleeve, the rear end of the locking ring is attached to the outer wall of the outer sleeve, and the first accommodating part is arranged on the inner wall of the front end of the locking ring.

Furthermore, the rear end of the locking sleeve radially extends inwards to form a boss, a clamping ring is arranged on the boss, a clamping groove matched with the clamping ring in the direction is formed in the outer wall of the outer sleeve, and the clamping ring is connected with the rear end of the elastic piece.

Furthermore, the outer wall surrounding the locking ring is provided with a stripe part, the stripe part comprises a plurality of stripes arranged along the length direction of the locking ring, and the position of the locking sleeve corresponding to the stripe part is provided with a strip-shaped groove matched with the stripes.

Further, a gasket is arranged on the clamping ring and connected with the elastic piece.

Further, the locking ring is connected with the locking sleeve through a pin.

Furthermore, a first bulge is arranged at the front end of the outer sleeve in a radially inward extending mode, a second bulge is arranged at the rear end of the connecting piece in a radially outward extending mode, and the second bulge is used for being clamped on the first bulge to prevent the connecting piece from being separated from the outer sleeve.

Further, the front part of the connecting piece is provided with external threads, and the rear part of the inner pipe is provided with internal threads.

Furthermore, the outer portion of the outer sleeve is provided with an identification groove close to the rear end of the locking sleeve, and the length between the identification groove and the rear end of the locking sleeve is equal to the length between the rear end of the locking ring and the first accommodating portion.

The invention has the beneficial effects that: the position switching of the positioning ball is realized through the first accommodating part, the second accommodating part and the through hole, when the positioning ball is positioned in the first accommodating part and the through hole, the inner pipe moves in the outer sleeve to realize the stretching, and along with the movement of the inner pipe, when the positioning ball is positioned in the second accommodating part and the through hole, the locking of the inner pipe and the outer sleeve is realized; the firmness degree of the telescopic rod is increased through the connecting piece and the locking mechanism.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a schematic cross-sectional view of a connector according to an embodiment of the present invention;

figure 5 is a schematic cross-sectional view of a locking ring in an embodiment of the invention;

figure 6 is a schematic view of the surface of a locking ring in an embodiment of the present invention.

Wherein: 1. a connector; 2. an outer sleeve; 3. a locking sleeve; 4. a gasket; 5. a collar; 6. an elastic member; 7. a positioning ball; 8. a pin; 9. locking a ring; 10. a notice board; 11. a connecting member; 12. an inner tube; 13. a first sleeve; 14. a second sleeve; 15. marking a slot;

91. a stripe portion; 92. a first annular groove;

111. an annular projection; 112. a second annular groove; 113. and (4) external threads.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The invention discloses a telescopic rod, which comprises an outer sleeve 2 and an inner tube 12 which are coaxially arranged, wherein the rear end of the inner tube 12 is connected with the front end of the outer sleeve 2 in a sliding way through a connecting piece 11; the rear part of the connecting piece 11 is positioned in the inner cavity of the outer sleeve 2, the front part of the connecting piece is positioned in the inner cavity of the inner tube 12, the rear part of the connecting piece 11 is provided with a second accommodating part, the outer sleeve 2 and the second accommodating part are provided with through holes at corresponding positions, and the accommodating parts and the through holes are internally provided with positioning balls 7.

The front end of the outer sleeve 2 is sleeved with a locking mechanism, and as shown in fig. 3, a first accommodating part is arranged on the contact surface of the locking mechanism and the outer sleeve 2; the locking mechanism is used for moving along the outer sleeve 2, when the first accommodating part is superposed with the positioning ball 7 and external force acts on the outer sleeve 2 or the inner tube 11, the positioning ball 7 is separated from the second accommodating part and enters the first accommodating part and the through hole, and then the inner tube 12 moves relative to the outer sleeve 2.

The locking mechanism moves along the outer sleeve 2 and can be divided into two conditions, one is axial movement along the outer sleeve 2 and can unlock or lock the inner pipe 12, and the other one is rotation around the outer sleeve 2 and can realize direction adjustment of connecting pieces at two ends of the telescopic rod.

In this embodiment, the setting of through-hole can provide accommodation space for location ball 7, can also realize the location of location ball 7, and in the operation of whole device, the majority of location ball 7 can be restricted in the through-hole, and then guarantees that location ball 7 can not deviate from. Moreover, the number of the positioning balls 7 can be selected according to the practical application, for example, when the clothes hanger is applied to a clothes hanger, only one or two positioning balls 7 can be used and correspond to one or two through holes because the requirement on the firmness degree is not high. When used in high-end mechanical devices, four or eight positioning balls 7 may be used, and the number of corresponding through holes is four or eight, because of the high requirement for firmness.

The position switching of the positioning ball 7 is realized through the first accommodating part, the second accommodating part and the through hole, when the positioning ball 7 is positioned in the first accommodating part and the through hole, the inner pipe 12 moves in the outer sleeve 2 to realize the expansion and contraction, and when the inner pipe 12 moves in place, the positioning ball 7 is forced to enter the second accommodating part and the through hole under the action of the elastic piece 6 to realize the locking of the inner pipe and the outer sleeve. Moreover, the connecting piece 11 and the locking mechanism can increase the firmness degree of the telescopic rod in the embodiment.

In this embodiment, as shown in fig. 5, the first receiving portion is specifically configured as a first annular groove 92, and as shown in fig. 4, the second receiving portion is specifically configured as a second annular groove 112 disposed along the outer circumference of the connecting member 111, so that when the connecting member 11 and the inner tube 12 are simultaneously rotated relative to the outer sleeve 2, since the second annular groove 112 is disposed along the outer circumference of the connecting member 11, the positioning ball 7 is still located in the groove and is not released. In order to achieve the stable connection between the connecting member 11 and the inner tube 12, a screw-locking glue or a pin needs to be screwed simultaneously when the two are screwed. Furthermore, when the outer sleeve 2 and the inner tube 12 are connected to the connector 1, it is also necessary to screw the locking glue or pin the same time.

The length and diameter of the outer sleeve 2 and the inner tube 12 can be determined according to actual needs, and specifically, because the inner tube 12 is telescopically moved in the outer sleeve 2, the outer diameter of the inner tube 12 needs to be smaller than the inner diameter of the outer sleeve 2. The connecting piece 11 is arranged inside the outer sleeve 2 and the inner tube 12, on one hand, the appearance is attractive, and on the other hand, the inner space of the outer sleeve 2 and the inner tube 12 can be fully utilized.

As a specific practical implementation manner, the locking mechanism in this embodiment includes a tubular locking sleeve 3 sleeved on the outer sleeve 2, and the locking sleeve 3 is disposed outside the outer sleeve 2 and the inner tube 12. The inner diameter of the locking sleeve 3 is slightly larger than the outer diameter of the outer sleeve 2, a cavity is formed between the inner wall of the locking sleeve 3 and the outer wall of the outer sleeve 2, an elastic part 6 parallel to the axial direction of the outer sleeve 2 is arranged at the rear end of the cavity, and a locking ring 9 is connected to the front end of the elastic part 6. The elastic member 6 may be selected as needed, and may be a rubber elastic member or a spring.

The locking ring 9 is sleeved outside the outer sleeve 2 and is fixedly connected with the locking sleeve 3, the inner wall surface of the rear end of the locking ring 9 is attached to the outer wall of the outer sleeve 2, and the front end is provided with a first annular groove 92, namely, the first annular groove is used as a representation form of a first accommodating part. Thus, when the telescopic rod is in a locking state, the edge of the positioning ball 7 is pressed against the inner wall of the rear end of the locking ring 9, and the positioning ball 7 is fixed on the second accommodating part on the connecting piece 11, so that the connecting piece 11 and the inner pipe 12 are difficult to move relatively and are locked. When the locking sleeve 3 is pressed in the indicated direction to drive the locking ring 9 to move towards the rear end, the first annular groove 92 and the positioning ball 7 are positioned on the same plane, when an external force pushes or pulls the inner sleeve 12 or the outer sleeve 2, the connecting piece 11 can extrude the positioning ball 7 out of the second accommodating part, the positioning ball 7 is extruded into the through hole on the outer sleeve 2 and the first annular groove 92 on the locking ring 9, and at the moment, the connecting piece 11 and the inner pipe 12 can freely move in a telescopic manner. In order to increase the firmness of the telescopic rod, the positioning ball 7 can be made of metal materials, such as iron balls, steel balls or alloy balls, and can also be made of glass balls, and the positioning ball can be specifically selected according to the actual use environment.

The rear end of the locking sleeve 3 radially extends inwards to form a boss, a clamping ring 5 is arranged on the boss, an annular clamping groove matched with the clamping ring 5 is formed in the outer wall of the outer sleeve 2, and the clamping ring 5 is connected with the rear end of the elastic piece 6. The rear end of the elastic element 6 is fixed by the clamping ring 5, so that the end part of the elastic element 6 is fixed relative to the outer sleeve 2, and meanwhile, the boss of the locking sleeve 3 is used for ensuring that the locking sleeve 3 cannot slip off from the outer sleeve 2. The boss can be annular, and can also be other arbitrary shapes that can satisfy and block lock sleeve 3.

As shown in fig. 6, a stripe portion 91 is provided on the outer wall surrounding the locking ring 9, the stripe portion 91 includes a plurality of stripes arranged along the length direction of the locking ring 9, and a strip-shaped groove matched with the stripes is provided at the position of the locking sleeve 3 corresponding to the stripe portion 91. Through setting up fringe portion 91 and a plurality of bar groove, can prevent that locking ring 9 from rotating at will in lock sleeve 3, guarantee the stability of locking ring 9.

Specifically, in order to prevent the wearing and tearing of long-time back elastic component 6 to rand 5, still be provided with packing ring 4 on rand 5, packing ring 4 is connected with elastic component 6, and like this long-time back of using, elastic component 6 only can cause wearing and tearing to packing ring 4, only need to be changed packing ring 4 can, compare in rand 5, the cost of manufacture of packing ring 4 is low, and the preparation degree of difficulty is low.

In order to ensure the stable connection between the locking sleeve 3 and the locking ring 9, the locking ring 9 is connected with the locking sleeve 3 through the pin 8, the connection mode has the main advantages of easy disassembly, and the locking ring 9 can be conveniently replaced after being worn and deformed by the positioning ball 7.

In order to prevent the inner tube 12 and the connecting member 11 from being removed from the outer sleeve 2 during the extension and retraction process, a first protruding portion is radially and inwardly extended at the front end of the outer sleeve 2, a second protruding portion 111 is radially and outwardly extended at the rear end of the connecting member 11, and the second protruding portion 111 is used for being clamped on the first protruding portion to prevent the connecting member 11 from being removed from the outer sleeve 12.

The front part of the connecting piece 11 is provided with an external thread 113, and the outer wall surface of the rear part of the inner pipe 12 is provided with an internal thread corresponding to the external thread 113. Therefore, the two can be connected by screw thread, and fixed by screwing locking glue or pins.

The outer sleeve 2 is provided with an identification groove 15 at the outer portion thereof near the right portion of the locking sleeve 3, and the length between the identification groove 15 and the left side end of the locking sleeve 3 is equal to the length between the left side end of the locking ring 9 and the first annular groove 92. Through this sign groove 15, can warn the user, the telescopic link is currently in the locking state, when lock sleeve 3 was by the pulling, can cover sign groove 15, and then operating personnel can realize that the telescopic link is in scalable state this moment. In addition, a warning label or a warning color may be applied to the marking groove 15.

In addition, in order to realize the matching use of the telescopic rod and other devices, the rear end of the outer sleeve 2 and the front end of the inner tube 12 are both provided with connectors 1 with joint bearings, and the angle of the connecting piece can be adjusted through the joint bearings. Since the front part of the inner tube 12 of the telescopic rod is retracted into the outer tube 2, the front part of the inner tube 12 is sleeved with the first and

second tubes

13 and 14, and the first and

second tubes

13 and 14 can be made of any suitable material. Moreover, after the whole telescopic rod is installed, since the locking ring 9 in the locking sleeve 3 only has one first annular groove 92, the locking sleeve 3 can only slide towards the first annular groove 92 to unlock the locking state of the telescopic rod, therefore, a notice board 10 can be arranged on the locking sleeve 3 to instruct the operator to prompt the sliding of the locking sleeve according to the direction on the notice board 10.

As a conventional choice for those skilled in the art, a first annular groove 92 may be provided on each of two sides of the locking ring 9, so that the telescopic rod can be extended and retracted by sliding the locking sleeve 3 in both directions, but the position of the collar 5 needs to be reset to ensure that the locking sleeve 3 can slide in both directions.

The using process of the invention is as follows:

when the telescopic rod is in a locking state, the locking sleeve 3 is pressed to drive the locking ring 9 to move, so that the first annular groove 92 and the positioning ball 7 are positioned on the same plane, the inner sleeve 12 is pushed or pulled by external force, the positioning ball 7 can be extruded out of the second accommodating part by the connecting piece 11, the positioning ball 7 is extruded into the through hole on the outer sleeve 2 and the first annular groove 92 on the locking ring 9, and at the moment, the connecting piece 11 and the inner tube 12 can freely move in a telescopic mode.

The locking sleeve 3 is loosened, the elastic piece 6 drives the locking ring 9 and the locking sleeve 3 to move in opposite directions, the first annular groove 92 and the positioning ball 7 are positioned on different planes, the positioning ball 7 is clamped in the through hole of the outer sleeve 2, when the inner tube 12 moves in place, the second accommodating part on the connecting piece 11 and the positioning ball 7 are positioned on the same plane, due to the extrusion force of the inner surface of the locking ring 9, the positioning ball 7 is extruded into the second accommodating part and the through hole, and at the moment, the telescopic rod is locked.

Claims

1. A telescopic rod is characterized by comprising an outer sleeve (2) and an inner tube (12) which are coaxially arranged, wherein the rear end of the inner tube (12) is connected with the front end of the outer sleeve (2) in a sliding manner through a connecting piece (11), and the inner tube (12) is fixedly connected with the connecting piece (111);

the rear part of the connecting piece (11) is positioned in the inner cavity of the outer sleeve (2), the front part of the connecting piece is positioned in the inner cavity of the inner tube (12), the rear part of the connecting piece (11) is provided with a second accommodating part, the outer sleeve (2) and the second accommodating part are provided with through holes at corresponding positions, and the accommodating part and the through holes are internally provided with positioning balls (7);

the front end of the outer sleeve (2) is sleeved with a locking mechanism, and a first accommodating part is arranged on the contact surface of the locking mechanism and the outer sleeve (2);

the locking mechanism is used for moving along the axial direction of the outer sleeve (2), when the first accommodating part is overlapped with the positioning ball (7) in position and external force acts on the outer sleeve (2) or the inner pipe (11), the positioning ball (7) is separated from the second accommodating part and enters the first accommodating part and the through hole, and then the inner pipe (12) moves relative to the outer sleeve (2).

2. A telescopic rod according to claim 1, wherein the locking mechanism comprises a tubular locking sleeve (3) sleeved on the outer sleeve (2), a cavity is formed between the inner wall of the locking sleeve (3) and the outer wall of the outer sleeve (2), an elastic member (6) parallel to the axial direction of the outer sleeve (2) is arranged at the rear end of the cavity, and a locking ring (9) is connected to the front end of the elastic member (6);

the locking ring (9) is sleeved outside the outer sleeve (2) and fixedly connected with the locking sleeve (3), the rear end of the locking ring (9) is attached to the outer wall of the outer sleeve (2), and the first accommodating part is arranged on the inner wall of the front end of the locking ring (9).

3. A telescopic rod according to claim 2, characterized in that the rear end of the locking sleeve (3) extends radially inwards to form a boss, a clamping ring (5) is arranged on the boss, a clamping groove matched with the clamping ring (5) is arranged on the outer wall of the outer sleeve (2), and the clamping ring (5) is connected with the rear end of the elastic part (6).

4. A telescopic rod according to claim 3, wherein a stripe portion (91) is provided around the outer wall of the locking ring (9), the stripe portion (91) comprises a plurality of stripes provided along the length direction of the locking ring (9), and a strip groove matched with the stripes is provided at a position of the locking sleeve (3) corresponding to the stripe portion (91).

5. A telescopic rod according to claim 3 or 4, characterized in that a washer (4) is arranged on the collar (5), said washer (4) being connected to the elastic member (6).

6. A telescopic rod according to claim 5, characterized in that the locking ring (9) is connected to the locking sleeve (3) by means of a pin (8).

7. A telescopic rod according to claim 6, characterized in that the front end of the outer sleeve (2) has a first protrusion extending radially inwards, and the rear end of the connecting member (11) has a second protrusion (111) extending radially outwards, the second protrusion (111) being adapted to catch on the first protrusion to prevent the connecting member (11) from being removed from the outer sleeve (12).

8. A telescopic rod according to claim 7, characterized in that the front part of the connecting piece (11) is provided with an external thread (113) and the rear part of the inner tube (12) is provided with an internal thread matching the external thread (113).

9. A telescopic rod according to claim 8, characterized in that the outer casing (2) is provided with an identification groove (15) on its outside near the rear end of the locking sleeve (3), the length between the identification groove (15) and the rear end of the locking sleeve (3) being equal to the length between the rear end of the locking ring (9) and the first receiving portion.