CN210509853U

CN210509853U - Double-head telescopic device

Info

Publication number: CN210509853U
Application number: CN201921272040.6U
Authority: CN
Inventors: 庄锦程; 王颖龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-12
Anticipated expiration: 2029-08-07

Abstract

The utility model discloses a double-head telescopic expansion device, which comprises an inner rod, a middle rod and an outer rod, wherein the middle rod is of a cavity structure with an opening, the inner wall of the middle rod is provided with a forward thread part, and the outer wall of the inner rod is provided with a forward thread matched with the forward thread part; the outer wall of well pole is equipped with reverse screw thread portion and first fixed part along the opening direction in proper order, and the one end of outer pole is equipped with opening and inner wall and is equipped with the reverse screw thread with reverse screw thread portion adaptation, just passes or the reversal through first fixed part drive well pole to the pole is carried on the back mutually or is moved in opposite directions in order to make interior pole or outer pole, in order to adjust flexible length. The utility model discloses can realize that outer pole and interior pole carry out in the both ends of king-rod in opposite directions or back of the body motion mutually, in limited space for flexible length extends widely, guarantees the stability of integrated device simultaneously.

Description

Double-head telescopic device

Technical Field

The utility model relates to a telescoping device's technical field especially relates to a telescopic rod structure that realizes that double-end is flexible in limited space.

Background

The telescopic device is widely applied to mechanical equipment in various fields, provides power for the equipment to reciprocate linearly, and has common application scenes such as various massage appliances, cleaning appliances, lifting equipment, transmission equipment and the like. The telescopic link that uses at present passes through the buckle, locking inner tube and outer tube such as bolt, the inner tube and the outer tube of buckle locking can only be fixed flexible certain length usually, and the device is when using, generally can only fix on limited ground space when the shrink state, and current telescopic link structure if will increase flexible length, must increase the length of outer tube, both need great accommodation space, and when extending, the inner tube is keeping away from the outer tube motion, when extending certain length, the outer tube is limited to the holding power of inner tube, lead to the equipment stability of inner tube connection poor easily, can't use in heavier equipment aspect.

SUMMERY OF THE UTILITY MODEL

To the weak point that exists in the above-mentioned technique, the utility model provides a flexible telescoping device of double-end can realize that outer pole and interior pole carry out in the both ends of king-rod in opposite directions or back-to-back motion, in limited space for flexible length is extended widely, guarantees the stability of integrated device simultaneously.

In order to achieve the purpose, the utility model provides a double-head telescopic device, which comprises an inner rod, a middle rod and an outer rod, wherein the middle rod is of a cavity structure with an opening, the inner wall of the middle rod is provided with a forward thread part, and the outer wall of the inner rod is provided with a forward thread matched with the forward thread part; the outer wall of king-rod is equipped with reverse screw portion and first fixed part along the opening direction in proper order, the one end of outer pole be equipped with the opening and the inner wall be equipped with the reverse screw thread of reverse screw portion adaptation, through first fixed part drive the king-rod is just passed or is reversed, so that the order the interior pole carries out back of the body or moves in opposite directions at the both ends of king-rod with outer pole to adjust flexible length.

Wherein the thread pitch of the positive thread part and the thread pitch of the external thread are equal.

Wherein, the one end that the opening was kept away from to outer pole is equipped with the second fixed part, just outer pole is established completely when the king-rod is last, the second is fixed to be extended to outside the side that the opening one end was kept away from to the king-rod.

The end, far away from the middle rod, of the inner rod is provided with a third fixing portion, and when the inner rod is completely accommodated in the middle rod, the third fixing portion extends out of an opening of the middle rod.

Wherein, still include the outer pole cover, first fixed part is kept away from open-ended part is the fourth fixed part, just be provided with on the fourth fixed part and be used for fixing the bearing of outer pole cover, the outer pole cover is provided with the bar groove along length direction, the outer pole is close to and is equipped with the stopper on the open-ended outer wall, just the stopper can the bar inslot slides, in order to inject the outer pole is relative the length of well pole motion.

The middle rod is driven by the stepping motor to rotate, a driving gear is fixed on a rotating shaft of the stepping motor, a fifth fixing part close to an opening is further arranged on the first fixing part, a driven gear meshed with the driving gear is sleeved on the fifth fixing part, and the middle rod is driven by the stepping motor to rotate.

The fixed part is provided with a first fixed groove, the inner wall of the driven wheel is provided with a second fixed groove, and the driven wheel is clamped between the first fixed groove and the second fixed groove through the fixed block, so that the driven gear is fixed on the middle rod.

The stepping motor is characterized by further comprising a motor sleeve, wherein the motor sleeve comprises a first sleeve and a second sleeve which are fixed with each other, the first sleeve is fixed on the outer wall of the stepping motor, and the second sleeve is sleeved on the outer rod.

The utility model has the advantages that: compared with the prior art, the utility model provides a double-head telescopic expansion device, a middle rod is a cavity structure with an opening, the inner wall of the middle rod is provided with a positive thread part, and the outer wall of the inner rod is provided with a positive thread matched with the positive thread part; the outer wall of king-rod is equipped with reverse screw portion and first fixed part along the opening direction in proper order, the one end of outer pole is equipped with opening and inner wall and is equipped with the reverse screw thread with reverse screw portion adaptation, just passes or the reversal through first fixed part drive king-rod to the messenger is interior pole and outer pole back of the body or move in opposite directions in order to adjust flexible length at the both ends of king-rod mutually, realizes under the space condition that only needs the holding king-rod, can make the length of extension increase widely, and guarantees the stability of whole device simultaneously.

Drawings

Fig. 1 is an overall schematic view of the present invention;

FIG. 2 is a schematic view of the extended state of the present invention;

fig. 3 is a second overall schematic view of the present invention;

fig. 4 is an exploded view of the present invention;

FIG. 5 is a schematic view of the present invention;

fig. 6 is a schematic view of the middle rod of the present invention.

The main element symbols are as follows:

1. inner rod 2, middle rod

3. Outer rod 4, outer rod sleeve

5. Bearing 6, step motor

7. Driving gear 8 and driven gear

9. Fixed block 10 and motor sleeve

11. Positive direction thread 12, third fixing part

21. Normal thread part 22 and reverse thread part

23. First fixing part 231 and fourth fixing part

232. Fifth fixing part 233 and first fixing groove

31. Reverse thread 32, second fixing part

41. Strip-shaped groove 81 and second fixing groove

101. A first sleeve 102, a second sleeve.

Detailed Description

In order to make the present invention clearer, the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1-4, the double-headed telescopic device of the present invention comprises an inner rod 1, a middle rod 2 and an outer rod 3, wherein the middle rod 2 is a cavity structure with an opening, the inner wall of the middle rod 2 is provided with a forward thread portion 21, the outer wall of the inner rod 1 is provided with a forward thread 11 adapted to the forward thread portion 21, the inner rod 1 is inserted into the middle rod 2 from the open end of the middle rod 2 through the forward thread 11 and is accommodated in the middle rod 2 in a spirally movable manner, the outer wall of the middle rod 2 is sequentially provided with a reverse thread portion 22 and a first fixing portion 23 along the opening direction, one end of the outer rod 3 is provided with an opening, the inner wall is provided with a reverse thread 31 adapted to the reverse thread portion 22, the outer rod 3 is inserted into the open end of the middle rod 2 from the middle rod 2 and is sleeved outside the middle rod 2 in a spirally movable manner, so that the middle rod is driven to rotate forward or reverse by the first fixing portion 23, so that the inner rod 1 and the outer rod 3, the telescopic length of the whole device is adjusted, so that the telescopic function is realized, the extended length can be greatly increased under the condition that only the space for accommodating the middle rod 2 is needed, and the stability of the whole device is ensured; the overall stability of the telescopic device can be adaptively changed according to the overall stability, for example, when the stability requirement is low, a positive thread part is arranged on the inner wall of the middle rod 2 close to the opening, the inner wall of the part far away from the opening is of a smooth structure, a negative thread part is arranged on the inner wall of the outer rod close to the opening, and the inner wall of the part far away from the opening is of a smooth structure, so that the inner rod 1 and the outer rod 3 can move towards or away from each other relative to the two ends of the middle rod 2; also can all be equipped with the thread portion on the whole of the inner wall at king-rod 2 and outer pole, guarantee like this that outer pole 3 and interior pole 1 all are threaded connection with the part of king-rod 2 contact, increase the axial force that the integrated device can bear the external world for stability strengthens greatly, specifically can set up as required, does not prescribe a limit to here.

In the present embodiment, referring to fig. 2 to 5, the thread pitches of the regular thread part 21 and the external thread 22 of the middle rod 2 are equal, so that the distances of the inner rod 1 and the outer rod 3 which can move spirally are equal, and the telescopic lengths are the same, which is twice the telescopic length of the prior art which can only perform single-head movement of the middle rod 2, and the space is fully utilized, so that the telescopic length is maximized; in general, the first fixing part 23 of the middle rod 2 is fixed with the driving device, then the inner rod 1 and the outer rod 3 are fixed with a device needing to be extended and contracted, the driving device drives the middle rod 2 to rotate forwards and reversely through the fixed part, so that the inner rod 1 and the outer rod 3 relatively move towards or away from the middle rod to change the equipment fixed on the inner rod 1 and the outer rod 3 to stretch and contract, therefore, a second fixing part 32 is arranged at one end of the outer rod 3 far away from the opening, and when the outer rod 3 is completely sleeved on the middle rod 2, the second fixing part 32 extends out of the middle rod 2, the outer rod 3 is fixed on the equipment by the second fixing part 32, the inner rod 1 and the equipment to be extended and contracted are fixed, the equipment fixed by the second fixing part 32 is used as a fixed point, the middle rod 2 is driven to move by the driving device, so that the middle rod 2 and the inner rod 1 move along the linear direction far away from the outer rod 3; for convenient interior pole 1 with treat that flexible equipment is fixed, the one end that well pole 2 was kept away from to interior pole 1 is equipped with third fixed part 12, and when interior pole 1 can hold the deepest length in well pole 2, third fixed part 12 extends to outside the opening of well pole 2, this third fixed part 12 is fixed with the equipment of treating flexible, drives through interior pole 1 and treats that flexible equipment carries out concertina movement to adjust flexible length, concrete fixed mode can select according to actual need.

In this embodiment, referring to fig. 3-6, further comprising an outer rod sleeve 4, a portion of the first fixing portion 23 away from the opening is a fourth fixing portion 231, and the fourth fixing portion 231 is provided with a bearing 5 for fixing the outer rod sleeve 4, the outer rod sleeve 4 is provided with a strip-shaped groove 41 along the length direction, the outer wall of the outer rod 3 close to the opening is provided with a limit block 33, and the limit block 33 can slide in the strip-shaped groove 41, so as to limit the moving length of the outer rod 3 relative to the middle rod 2, prevent the outer rod 3 from directly falling off from the middle rod 2 when the middle rod 2 rotates forwards or reversely excessively, play a role in positioning, meanwhile, the outer rod 3 is limited to rotate by taking the central shaft of the outer rod as a rotating shaft, so that the outer rod 3 moves along the linear direction far away from or close to the middle rod 2, the limiting block 32 can be replaced by a screw to play a role, and the outer rod 3 can be fixed through the outer rod sleeve 4; the first fixing portion 23 may be driven by a manual drive or a drive device, taking the drive device as a step motor 6 as an example, a driving gear 7 is fixed on a rotating shaft of the step motor 6, the first fixing portion 23 is further provided with a fifth fixing portion 232 close to the opening, and the fifth fixing portion 232 is sleeved with a driven gear 8 meshed with the driving gear 7, so that the step motor 6 drives the middle rod 2 to rotate, for example, the step motor 6 drives the driving gear 7 to rotate in a forward direction, so as to drive the middle rod 2 to rotate in a forward direction along with the driven gear 8, and further the outer rod 3 and the inner rod 1 move back to the two ends of the middle rod 2, so that the length of the whole device is increased; the stepping motor 6 rotates forwards to drive the driving gear 7 to rotate backwards so as to drive the middle rod 2 to rotate backwards along with the driven gear 8, and then the outer rod 3 and the inner rod 1 move towards two ends of the middle rod 2 in opposite directions, so that the whole device is shortened, wherein the driving gear 7 and the driven gear 8 can be replaced by a driving belt or a chain, and the effect of driving the middle rod 2 to rotate can be achieved; the structure that the driven gear 8 is fixed on the middle rod 2 is as follows: a first fixing groove 233 is formed in the fifth fixing portion 232, a second fixing groove 81 is formed in the inner wall of the driven gear 8, and the fixing block 9 is clamped between the first fixing groove 233 and the second fixing groove 81, so that the driven gear 8 is fixed to the middle rod 2 without affecting the forward rotation and/or the reverse rotation of the middle rod 2; in order to fix the integral device and the applied equipment conveniently, the device further comprises a motor sleeve 10, the motor sleeve 10 is provided with a first sleeve 101 and a second sleeve 102 which are fixed with each other, the first sleeve 101 is fixed on the outer wall of the stepping motor 6, the second sleeve 102 is sleeved on the outer rod 3, the second sleeve 102 can be directly sleeved on the outer wall of the outer rod 3 or sleeved on the outer wall of the outer rod sleeve 4, and only the fixing function is achieved.

The utility model has the advantages that:

(1) the inner rod and the outer rod are arranged and are respectively in rotary connection with the middle rod through a positive thread structure or a negative thread structure, the first fixing part is arranged on the middle rod, the middle rod is driven to rotate forwards or reversely through the first fixing part, the outer rod and the inner rod can move in the opposite direction or in the opposite direction at two ends of the middle rod, the telescopic length is greatly lengthened in a limited space, and meanwhile, the stability of the whole device is guaranteed;

(2) set up the outer pole cover, and the outer pole cover is equipped with the bar groove along length direction to fix the fixed part at the king-rod through the bearing, and be equipped with the stopper on the outer pole is close to its open-ended one side outer wall, in order to restrict the length of outer pole back of the body motion of carrying on the back, prevent that the outer pole from droing from the king-rod, play good positioning action.

The above disclosure is only one or several specific embodiments of the present invention, but the present invention is not limited thereto, and any changes that can be made by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A double-head telescopic device is characterized by comprising an inner rod, a middle rod and an outer rod, wherein the middle rod is of a cavity structure with an opening, a forward threaded part is arranged on the inner wall of the middle rod, and a forward thread matched with the forward threaded part is arranged on the outer wall of the inner rod; the outer wall of king-rod is equipped with reverse screw portion and first fixed part along the opening direction in proper order, the one end of outer pole be equipped with the opening and the inner wall be equipped with the reverse screw thread of reverse screw portion adaptation, through first fixed part drive the king-rod is just passed or is reversed, so that the order the interior pole carries out back of the body or moves in opposite directions at the both ends of king-rod with outer pole to adjust flexible length.

2. The double-ended telescopic device according to claim 1, wherein the pitch of said normal thread portion and said external thread is equal.

3. The telescopic device of claim 2, wherein a second fixing portion is provided at an end of the outer rod away from the opening, and when the outer rod is completely sleeved on the middle rod, the second fixing portion extends to a side of the middle rod away from the end of the opening.

4. The telescopic device of claim 1 or 3, wherein a third fixing portion is provided at an end of the inner rod away from the middle rod, and when the inner rod is completely received in the middle rod, the third fixing portion extends out of the opening of the middle rod.

5. The telescopic device with the double telescopic ends as claimed in claim 1, further comprising an outer rod sleeve, wherein the part, away from the opening, of the first fixing part is a fourth fixing part, the fourth fixing part is provided with a bearing for fixing the outer rod sleeve, the outer rod sleeve is provided with a strip-shaped groove along the length direction, the outer rod is provided with a limiting block on the outer wall close to the opening, and the limiting block can slide in the strip-shaped groove to limit the length of the outer rod relative to the movement of the middle rod.

6. The telescopic device of claim 1 or 5, further comprising a step motor, wherein a driving gear is fixed on a rotation shaft of the step motor, the first fixing portion is further provided with a fifth fixing portion close to the opening, and the fifth fixing portion is provided with a driven gear engaged with the driving gear, so that the step motor drives the middle rod to rotate.

7. The telescopic device of claim 6, wherein a first fixing groove is formed on the fixing portion, a second fixing groove is formed on an inner wall of the driven wheel, and the driven wheel is engaged between the first fixing groove and the second fixing groove by a fixing block, so that the driven gear is fixed to the middle rod.

8. The telescopic device of claim 6, further comprising a motor housing, wherein the motor housing comprises a first sleeve and a second sleeve fixed to each other, the first sleeve is fixed to an outer wall of the stepping motor, and the second sleeve is sleeved on the outer rod.