CN204655861U - Be convenient to the self-locking jumping stand heightened - Google Patents
Be convenient to the self-locking jumping stand heightened Download PDFInfo
- Publication number
- CN204655861U CN204655861U CN201520327258.2U CN201520327258U CN204655861U CN 204655861 U CN204655861 U CN 204655861U CN 201520327258 U CN201520327258 U CN 201520327258U CN 204655861 U CN204655861 U CN 204655861U
- Authority
- CN
- China
- Prior art keywords
- slide block
- fixed pulley
- cross bar
- chute
- side lever
- 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
Links
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- Press Drives And Press Lines (AREA)
Abstract
Be convenient to the self-locking jumping stand heightened.Traditional jumping stand is made up of base, side lever, cross bar, slide block, being difficult to ensure that cross bar is horizontal, needing the height of adjustment two slide blocks to ensure the level of cross bar when adjusting height.Composition of the present utility model comprises: base (1), side lever (2) and cross bar (3), it is characterized in that: described side lever is fixed on described base, chute (4) is provided with in described side lever, the upper and lower two ends of described chute are respectively equipped with fixed pulley (5), lower fixed pulley (6), described upper fixed pulley is connected with slide block (8) by steel wire (7) with described lower fixed pulley, described slide block to be arranged in described chute and to form sliding pair with described chute, described cross bar lies in a horizontal plane on described slide block, described lower fixed pulley is connected with power transmission shaft (9) by flat key, described power transmission shaft is provided with handwheel (10).The utility model is for being convenient to the self-locking jumping stand heightened.
Description
technical field:
the utility model relates to a kind of self-locking jumping stand being convenient to heighten.
background technology:
traditional jumping stand is made up of base, side lever, cross bar, slide block.Two side levers of jumping stand are fixed on base, each side lever respectively have a slide block, and cross bar lies in a horizontal plane on two slide blocks.Slide block vertically can slide along side lever, and in time sliding into the height of needs, slide block is fixed by the screw tightened respectively on two slide blocks.Jumping stand needs the height constantly adjusting cross bar according to the needs of user in use, all needs the screw unscrewed on slide block at every turn, not only loses time but also after long-time parbuckle screw repeatedly, the screw thread on screw easily damages, and causes screw thread pair unavailable.This jumping stand is difficult to ensure that cross bar is horizontal when adjusting height, needs the height of adjustment two slide blocks to ensure the level of cross bar.
utility model content:
the purpose of this utility model is to provide a kind of self-locking jumping stand being convenient to heighten.
above-mentioned object is realized by following technical scheme:
a kind of self-locking jumping stand being convenient to heighten, its composition comprises: base, side lever and cross bar, described side lever is fixed on described base, chute is provided with in described side lever, the upper and lower two ends of described chute are respectively equipped with fixed pulley, lower fixed pulley, described upper fixed pulley is connected with slide block by steel wire with described lower fixed pulley, described slide block to be arranged in described chute and to form sliding pair with described chute, described cross bar lies in a horizontal plane on described slide block, described lower fixed pulley is connected with power transmission shaft by flat key, described power transmission shaft is provided with handwheel.
the beneficial effects of the utility model:
1. the utility model only needs hand rotation handwheel when adjusting cross bar height, just can realize the lifting of cross bar level.
chute on slide block of the present utility model and two side levers can self-locking, stop operating handwheel time cross bar can rest on present position.
accompanying drawing illustrates:
accompanying drawing 1 is structural representation of the present utility model.
accompanying drawing 2 is lateral column structure charts of the present utility model.
accompanying drawing 3 is that this uses novel slide block structure figure.
accompanying drawing 4 is that this uses novel self-lock mechanism figure.
accompanying drawing 5 is the novel schematic diagrams that move upward of this use.
accompanying drawing 6 be this use novel move downward schematic diagram.
detailed description of the invention:
embodiment 1:
a kind of self-locking jumping stand being convenient to heighten, its composition comprises: base 1, side lever 2 and cross bar 3, it is characterized in that: described side lever is fixed on described base, chute 4 is provided with in described side lever, the upper and lower two ends of described chute are respectively equipped with fixed pulley 5, lower fixed pulley 6, described upper fixed pulley is connected with slide block 8 by steel wire 7 with described lower fixed pulley, described slide block to be arranged in described chute and to form sliding pair with described chute, described cross bar lies in a horizontal plane on described slide block, described lower fixed pulley is connected with power transmission shaft 9 by flat key, described power transmission shaft is provided with handwheel 10.
embodiment 2:
the self-locking jumping stand that being convenient to according to embodiment 1 is heightened, described slide block is do not have under steel wire pulling force effect can self-locking;
as shown in Figure 4, GL=F
n
l
1
, F
n
=GL/L
1
;
if think, slide block self-locking can only need 2 μ F
n
>G, i.e. 2 μ GL/L
1
>G, L/L
1
>2 μ;
from self-lock mechanism, only need L>L
1
/ μ, no matter cross bar, whether from landing slide block, can realize self-locking.
embodiment 3:
the self-locking jumping stand that being convenient to according to embodiment 1 or 2 is heightened, described slide block moves upward principle, as shown in Figure 5;
F
1
L
2
-GL= F
N
·L
1
；
F
1
- GL / L
2
＝F
N
L
1
／L
2
,F
1
- GL / L
2
－F
N
L
1
／L
2
=0;
realize slide block upward sliding if want and need meet F
1
-G-2 μ F
n
>0; Work as L>L
2
, L
1
/ L
2
during >2 μ, as long as give an enough large tensile force f
2
, slide block is bound to move upward along slideway.
embodiment 4:
the self-locking jumping stand that being convenient to according to embodiment 1 or 2 is heightened, described slide block moves downward former, as shown in Figure 6;
F
2
L
3
-GL= F
N
．L
1
F
2
-GL／L
3
＝F
N
L
1
／L
3
,Ｆ
2
- GL／L
3
- F
N
L
1
／L
3=0
realize slide block upward sliding if want and need meet F
2
+ G-2 μ F
n
>0; Work as L
1
/ L
3
during >2 μ, as long as give an enough large tensile force f
2
, slide block is bound to move downward along slideway.
Claims (1)
1. be convenient to the self-locking jumping stand heightened for one kind, its composition comprises: base, side lever and cross bar, it is characterized in that: described side lever is fixed on described base, chute is provided with in described side lever, the upper and lower two ends of described chute are respectively equipped with fixed pulley, lower fixed pulley, described upper fixed pulley is connected with slide block by steel wire with described lower fixed pulley, described slide block to be arranged in described chute and to form sliding pair with described chute, described cross bar lies in a horizontal plane on described slide block, described lower fixed pulley is connected with power transmission shaft by flat key, described power transmission shaft is provided with handwheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520327258.2U CN204655861U (en) | 2015-05-20 | 2015-05-20 | Be convenient to the self-locking jumping stand heightened |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520327258.2U CN204655861U (en) | 2015-05-20 | 2015-05-20 | Be convenient to the self-locking jumping stand heightened |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204655861U true CN204655861U (en) | 2015-09-23 |
Family
ID=54126303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520327258.2U Expired - Fee Related CN204655861U (en) | 2015-05-20 | 2015-05-20 | Be convenient to the self-locking jumping stand heightened |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204655861U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109011322A (en) * | 2018-08-13 | 2018-12-18 | 李娜 | A kind of adjustable device for high jump |
| AU2017219064B2 (en) * | 2016-09-19 | 2022-06-30 | William John Roberson | Improved adjustable high jump system |
-
2015
- 2015-05-20 CN CN201520327258.2U patent/CN204655861U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2017219064B2 (en) * | 2016-09-19 | 2022-06-30 | William John Roberson | Improved adjustable high jump system |
| CN109011322A (en) * | 2018-08-13 | 2018-12-18 | 李娜 | A kind of adjustable device for high jump |
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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: 20150923 Termination date: 20160520 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |