CN204127051U - Tripod telescopic pipe interlock assembly - Google Patents
Tripod telescopic pipe interlock assembly Download PDFInfo
- Publication number
- CN204127051U CN204127051U CN201420553339.XU CN201420553339U CN204127051U CN 204127051 U CN204127051 U CN 204127051U CN 201420553339 U CN201420553339 U CN 201420553339U CN 204127051 U CN204127051 U CN 204127051U
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- CN
- China
- Prior art keywords
- pedestal
- screw rod
- telescopic pipe
- expansion sleeve
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
A kind of tripod telescopic pipe interlock assembly, it comprises pedestal and expansion sleeve, pedestal one end is provided with joint, the pedestal the other end is provided with the screw rod of taper, and screw rod is provided with away from one end of pedestal the spacing preiection that close end position is provided with annular, expansion sleeve is socketed on screw rod, and the limited protruding axial limiting of expansion sleeve is between spacing preiection and pedestal, expansion sleeve is divided at least two circumferentially uniform expanding petals, connecting tendon is provided with between two adjacent expanding petals, and pedestal, joint, screw rod and spacing preiection are integral type structure, the axial width of connecting tendon is less than 1/4 value of expansion sleeve axial length, and be wherein provided with breach between adjacent two expanding petals in a place, the outer side surface of expanding petal is provided with some convex tendons, the length direction of convex tendon and the parallel to an axis of screw rod, compared with prior art, it is better that the utility model has stability in use, assembles easier and that cost of production is lower feature.
Description
Technical field
The utility model relates to a kind of lockable mechanism, particularly relates to a kind of tripod telescopic pipe interlock assembly.
Background technique
At present, existing tripod telescopic pipe interlock assembly, if publication number is CN 201014158 Y, name is called structure disclosed in a kind of telescopic leg tripod, comprise screw rod, opening expanding sheath and and frustoconic shape expansion block, principle controls frustoconic shape expansion block by screw rod to slidably reciprocate, thus make opening expanding sheath spreading to reach the object of locking; But this structure needs to arrange the mechanism spacing to frustoconic shape expansion block circumference in opening expanding sheath or telescopic pipe, otherwise frustoconic shape expansion block will rotate together along with screw rod and cannot slidably reciprocate, the object making opening expanding sheath spreading is not just had yet, this adds increased preparation cost, be stuck in owing to needing to locate snap ring axial position screw rod being used for limiting opening expanding sheath simultaneously, but in use location snap ring easily destroys the screw thread on screw rod, and location snap ring also exists the situation loosening or throw off with screw rod when locking, stability in use is poor; And component are more, assembling also comparatively bothers, and packaging efficiency is lower, and then causes cost of production higher.
At present, also have some telescopic pipe interlock assemblies on alpin-stock, if publication number is CN 203272368 U, name is called that the Chinese patent of internal lock of alpenstock and publication number are CN 203404191 U, name is called that alpin-stock expands the Chinese patent of anti-dieback device, but these two interlock assemblies are equipped with spring, and the use of tripod is different with the usage mode of alpin-stock, the time that tripod needs maintenance position longer in use usually, the time used especially for the tripod arranging lighting burner is also just longer, this just makes spring easily lose efficacy under long effect of stress and cause the problem that interlock assembly cannot use, therefore be all not suitable for using on tripod, and component are also more, structure is more complicated, and cost of production is higher.
Model utility content
The utility model provides a kind of stability in use better for above problem, assembles easier and that cost of production is lower tripod telescopic pipe interlock assembly.
The utility model overcomes the above problems technological scheme used: provide a kind of tripod telescopic pipe interlock assembly with following structure, it comprises pedestal and expansion sleeve, described pedestal one end is provided with joint, the pedestal the other end is provided with the screw rod of taper, and screw rod is provided with away from one end of pedestal the spacing preiection that close end position is provided with annular, described expansion sleeve is socketed on screw rod, and the limited protruding axial limiting of expansion sleeve is between spacing preiection and pedestal, described expansion sleeve is divided at least two circumferentially uniform expanding petals, connecting tendon is provided with between two adjacent expanding petals, and pedestal, joint, screw rod and spacing preiection are integral type structure, the axial width of described connecting tendon is less than 1/4 value of expansion sleeve axial length, and be wherein provided with breach between adjacent two expanding petals in a place, the outer side surface of described expanding petal is provided with some convex tendons, the length direction of described convex tendon and the parallel to an axis of screw rod.
After adopting above structure, compared with prior art, the utility model due to pedestal, joint, screw rod and spacing preiection be integral type structure, the limited protruding axial limiting of expansion sleeve is between spacing preiection and pedestal, and the outer side surface of expanding petal is provided with some convex tendons, then in use, spacing preiection can not destroy the screw thread on screw rod, spacing preiection also can not be thrown off with screw rod, and stability in use is better; Do not need other circumferential position-limit mechanism, under the effect of convex tendon, expansion sleeve can strut and realize the effect spacing to flexible rod by screw rod simultaneously, and entirety only has two component separated, therefore component are less, assemble easier, efficiency is higher, and then reduces cost of production; Moreover pedestal, joint, screw rod and spacing preiection are produced by molding and forming, expansion sleeve is also produced by molding and forming, therefore manufacturing efficiency is higher, and then significantly can reduce cost of production.Therefore the utility model has stability in use better, assembles easier and that cost of production is lower feature.
As improvement, described screw rod is provided with changeover portion away from one end of pedestal, the external diameter of described changeover portion equals the external diameter of screw rod away from pedestal one end, and the axial length of changeover portion is less than 1/2 value of screw axial length, and described spacing preiection is positioned at one end end of changeover portion away from screw rod; Then the changeover portion space that after arranging, expansion sleeve slided up and down is larger, under the cooperation of screw thread thread height, make expansion sleeve can adapt to the relatively large telescopic pipe of tolerance, due to the use of tripod telescopic pipe are all welded pipes, therefore the tolerance of telescopic pipe is larger, then make the utility model be more suitable for use in tripod telescopic pipe, use flexibility better.
As further improvement, described pedestal is provided with counterbore, the axis of counterbore and the dead in line of pedestal, and the opening of counterbore is positioned at joint; Then owing to being by molding and forming, after counterbore is arranged, do not increase processing cost and do not affect bulk strength prerequisite under, save raw-material use, significantly can reduce the cost of production of pedestal, and then reduce cost of production of the present utility model.
As improving further, described pedestal and the transition position of screw rod are provided with radial protrusion again, and the external diameter of described joint is less than the external diameter of pedestal; After then arranging like this; pedestal can the connecting in telescopic pipe of two sizes, uses flexibility better, and after radial protrusion arranges; make workman when assembling; not easily pedestal is inserted in telescopic pipe completely under radial convex role, and then the hand of protection workman, prevent workman's hand when pedestal is inserted telescopic pipe; cut by the end of telescopic pipe because inserting dark; make Security when assembling better, and be also convenient to the force of workman, thus improve the efficiency that pedestal inserts telescopic pipe.
As improving further, the pedestal outer circumferential face between described radial protrusion and joint is round table surface again, and the transition position rounding of pedestal and joint; Then after rounding, be easier to the demoulding when molding and forming, make the demoulding efficiency of product higher, and be also easier to fill type, effectively can reduce the appearance of injection defect, improve yield rate further, thus reduce cost of production further.
As improving further, described joint is round table surface away from the outer circumferential face of pedestal one end again; After then round table surface is arranged, round table surface plays the effect of guiding, makes joint be easier to be inserted into telescopic pipe, can further improve the efficiency of worker assembles's tripod, and then reduces the cost of production of tripod.
As improving further, described spacing preiection is away from the edge chamfering of screw rod again; After then chamfering is arranged, make expansion sleeve be easier to be nested on screw rod, the demoulding simultaneously also when molding and forming, make the demoulding efficiency of product and have higher success rate.
As improving further, the screw thread on described screw rod is square threaded form again; After then square threaded form is arranged, the strength of screw thread is larger, makes telescopic pipe can bear larger pressure, and the degree of depth of screw thread also can be darker, thus makes the yardstick of expansion sleeve spreading and contraction larger, is applicable to the larger telescopic pipe of tolerance range.
As further improving, the width of the end of the nearly spacing preiection of the screw thread on described screw rod is less than the width of the screw thread in the middle part of screw rod; After then arranging like this, make the screw thread on screw rod be easier to engage with the internal thread on expansion sleeve, and then improve user's locking efficiency in use, be convenient to the use of user.
Accompanying drawing explanation
Fig. 1 is the detonation configuration schematic diagram of the utility model tripod telescopic pipe interlock assembly.
Fig. 2 is the sectional view of the utility model tripod telescopic pipe interlock assembly.
Fig. 3 is the partial sectional view of the utility model tripod telescopic pipe interlock assembly.
Fig. 4 is the structural representation of the utility model tripod telescopic pipe interlock assembly expansion sleeve.
As shown in the figure: 1, pedestal, 2, expansion sleeve, 2.1, expanding petal, 2.2, connecting tendon, 2.3, breach, 2.4, convex tendon, 3, joint, 4, screw rod, 5, spacing preiection, 6, changeover portion, 7, counterbore, 8, radial protrusion.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
As Fig. 1, Fig. 2, a kind of tripod telescopic pipe interlock assembly shown in Fig. 3 and Fig. 4, it comprises pedestal 1 and expansion sleeve 2, pedestal 1 one end described in it is provided with joint 3, pedestal 1 the other end is provided with the screw rod 4 of taper, and screw rod 4 is provided with away from one end of pedestal 1 spacing preiection 5 that close end position is provided with annular, described expansion sleeve 2 is socketed on screw rod 4, and limited protruding 5 axial limitings of expansion sleeve 2 are between spacing preiection 5 and pedestal 1, described expansion sleeve 2 is divided at least two circumferentially uniform expanding petals 2.1, and (this example is three, also can be two, four, five or six etc.), connecting tendon 2.2 is provided with between two adjacent expanding petals 2.1, and pedestal 1, joint 3, screw rod 4 and spacing preiection 5 are integral type structure, the axial width of described connecting tendon 2.2 is less than 1/4 value of expansion sleeve 2 axial length, the size of general connecting tendon 2.2 is identical with the size of runner during injection moulding, so just without the need to arranging runner in addition, it is exactly connecting tendon 2.2 after runner is shaping, and be wherein provided with breach 2.3 between adjacent two expanding petals 2.1 in a place, namely there is a place that connecting tendon 2.2 is not set between two adjacent expanding petals 2.1, connecting tendon 2.2 is provided with between remaining two adjacent expanding petal 2.1, the outer side surface of described expanding petal 2.1 is provided with some convex tendons 2.4, the length direction of described convex tendon 2.4 and the parallel to an axis of screw rod 4, one end end face of the nearly spacing preiection 5 of general convex tendon 2.4 is inclined-plane, is convenient to molding and forming and the demoulding like this, and after convex tendon 2.4 arranges, do not affect telescopic pipe to stretch normally, and when telescopic pipe rotates, at convex tendon 2.4 under the effect of tube wall frictional force, screw rod 4 and expansion sleeve 2 move toward one another, thus realize expansion sleeve 2 spreading, and the effect spacing to telescopic pipe.Usual tripod telescopic pipe interlock assembly of the present utility model and outer lock mechanism with the use of, because use tripod of the present utility model to be usually all used to priming illumination equipment, this just needs tripod to remain on a position for a long time, therefore the stability of lockable mechanism is extremely important, otherwise easily there is the problem that cannot lock for a long time.
Described screw rod 4 is provided with changeover portion 6 away from one end of pedestal 1, the external diameter of described changeover portion 6 equals the external diameter of screw rod 4 away from pedestal 1 one end, and the axial length of changeover portion 6 is less than 1/2 value of screw rod 4 axial length, screw rod 4 axial length that the axial length of general changeover portion 6 equals 1/3, can certainly arrange other length according to actual needs, described spacing preiection 5 is positioned at one end end of changeover portion 6 away from screw rod 4.
Described pedestal 1 is provided with counterbore 7, the axis of counterbore 7 and the dead in line of pedestal 1, and the opening of counterbore 7 is positioned at joint 3, and the shape of general counterbore 7 and pedestal 1, joint 3, screw rod 4 are identical with the shape of changeover portion 6.
Described pedestal 1 is provided with radial protrusion 8 with the transition position of screw rod 4, and the external diameter of described joint 3 is less than the external diameter of pedestal 1.
Pedestal 1 outer circumferential face between described radial protrusion 8 and joint 3 is round table surface, and the transition position rounding of pedestal 1 and joint 3.
Described joint 3 is round table surface away from the outer circumferential face of pedestal 1 one end.
Described spacing preiection 5 is away from the edge chamfering of screw rod 4.
Screw thread on described screw rod 4 is square threaded form, certainly also can be trapezoidal thread or V thread screw.
The width of the end of the nearly spacing preiection 5 of the screw thread on described screw rod 4 is less than the width of the screw thread in the middle part of screw rod 4, the end of the nearly spacing preiection 5 of the screw thread namely on screw rod 4 is provided with the thread section of one end for guiding, the width of this section of screw thread is less than the width of other position screw thread of screw rod 4, and certain screw thread all seamlessly transits.
Above embodiment is only preferred embodiment of the present utility model, and the utility model is not limited only to above embodiment and has also allowed other structural change, allly to change in the utility model rights to independence claimed range, all belongs to the utility model protection domain.
Claims (9)
1. a tripod telescopic pipe interlock assembly, it comprises pedestal (1) and expansion sleeve (2), it is characterized in that: described pedestal (1) one end is provided with joint (3), pedestal (1) the other end is provided with the screw rod (4) of taper, and screw rod (4) is provided with away from one end of pedestal (1) spacing preiection (5) that close end position is provided with annular, described expansion sleeve (2) is socketed on screw rod (4), and expansion sleeve (2) limited projection (5) axial limiting is between spacing preiection (5) and pedestal (1), described expansion sleeve (2) is divided at least two circumferentially uniform expanding petals (2.1), connecting tendon (2.2) is provided with between two adjacent expanding petals (2.1), and pedestal (1), joint (3), screw rod (4) and spacing preiection (5) are integral type structure, the axial width of described connecting tendon (2.2) is less than 1/4 value of expansion sleeve (2) axial length, and be wherein provided with breach (2.3) between adjacent two expanding petals (2.1) in a place, the outer side surface of described expanding petal (2.1) is provided with some convex tendons (2.4), the length direction of described convex tendon (2.4) and the parallel to an axis of screw rod (4).
2. tripod telescopic pipe interlock assembly according to claim 1, it is characterized in that: described screw rod (4) is provided with changeover portion (6) away from one end of pedestal (1), the external diameter of described changeover portion (6) equals the external diameter of screw rod (4) away from pedestal (1) one end, and the axial length of changeover portion (6) is less than 1/2 value of screw rod (4) axial length, described spacing preiection (5) is positioned at one end end of changeover portion (6) away from screw rod (4).
3. tripod telescopic pipe interlock assembly according to claim 1, it is characterized in that: described pedestal (1) is provided with counterbore (7), the axis of counterbore (7) and the dead in line of pedestal (1), and the opening of counterbore (7) is positioned at joint (3).
4. tripod telescopic pipe interlock assembly according to claim 1, it is characterized in that: described pedestal (1) is provided with radial protrusion (8) with the transition position of screw rod (4), and the external diameter of described joint (3) is less than the external diameter of pedestal (1).
5. tripod telescopic pipe interlock assembly according to claim 4, it is characterized in that: pedestal (1) outer circumferential face between described radial protrusion (8) and joint (3) is round table surface, and the transition position rounding of pedestal (1) and joint (3).
6. tripod telescopic pipe interlock assembly according to claim 1, is characterized in that: described joint (3) is round table surface away from the outer circumferential face of pedestal (1) one end.
7. tripod telescopic pipe interlock assembly according to claim 1, is characterized in that: described spacing preiection (5) is away from the edge chamfering of screw rod (4).
8. tripod telescopic pipe interlock assembly according to claim 1, is characterized in that: the screw thread on described screw rod (4) is square threaded form.
9. tripod telescopic pipe interlock assembly according to claim 8, is characterized in that: the width of the end of the nearly spacing preiection of screw thread (5) on described screw rod (4) is less than the width of the screw thread at screw rod (4) middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553339.XU CN204127051U (en) | 2014-09-24 | 2014-09-24 | Tripod telescopic pipe interlock assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553339.XU CN204127051U (en) | 2014-09-24 | 2014-09-24 | Tripod telescopic pipe interlock assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204127051U true CN204127051U (en) | 2015-01-28 |
Family
ID=52383410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420553339.XU Expired - Fee Related CN204127051U (en) | 2014-09-24 | 2014-09-24 | Tripod telescopic pipe interlock assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204127051U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109171188A (en) * | 2018-11-13 | 2019-01-11 | 衡阳师范学院 | A kind of portable music stand |
| CN112943776A (en) * | 2021-03-10 | 2021-06-11 | 扬州工业职业技术学院 | High-strength special nut with constant friction coefficient |
-
2014
- 2014-09-24 CN CN201420553339.XU patent/CN204127051U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109171188A (en) * | 2018-11-13 | 2019-01-11 | 衡阳师范学院 | A kind of portable music stand |
| CN109171188B (en) * | 2018-11-13 | 2023-08-15 | 衡阳师范学院 | Portable music stand |
| CN112943776A (en) * | 2021-03-10 | 2021-06-11 | 扬州工业职业技术学院 | High-strength special nut with constant friction coefficient |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20180924 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |