CN204714405U - Jib for tower crane lower edge connection structure - Google Patents
Jib for tower crane lower edge connection structure Download PDFInfo
- Publication number
- CN204714405U CN204714405U CN201520235405.3U CN201520235405U CN204714405U CN 204714405 U CN204714405 U CN 204714405U CN 201520235405 U CN201520235405 U CN 201520235405U CN 204714405 U CN204714405 U CN 204714405U
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- China
- Prior art keywords
- lower edge
- bearing pin
- engaging lug
- tower crane
- jib
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Abstract
The utility model relates to a kind of jib for tower crane lower edge connection structure, especially a kind ofly meets the tendency for the jib for tower crane lower edge connection structure in tower crane field.The utility model provides one can adapt to the outer engaging lug of lower edge forked standard and outer engaging lug different pore size, the jib for tower crane lower edge connection structure making the connection of crane arm lower edge more reliable and more stable.Jib for tower crane lower edge connection structure, comprise lower edge forked standard, lower edge jaw, spring cotter and connection bearing pin, described outer engaging lug is provided with exit orifice, described lower edge jaw is provided with engaging lug, described engaging lug is provided with connecting bore, and described connection bearing pin is made up of external ear shaft part, inner ear shaft part and bearing pin section successively, and described pin-and-hole is arranged in bearing pin section, described external ear section coordinates with exit orifice, described inner ear section and inner hole.Inner ear shaft part and endoporus precise match; External ear section and exit orifice precise match, make the forked standard of lower edge can accurately be connected with jaw.
Description
Technical field
The utility model relates to a kind of jib for tower crane lower edge connection structure, especially a kind ofly meets the tendency for the jib for tower crane lower edge connection structure in tower crane field.
Background technology
Jib for tower crane is the critical component of tower crane, state of kinematic motion at crane arm in lifting process, the load more complicated that it bears, therefore require that its connection structure is reliable and stable, and the lower edge of crane arm is connection structure important on crane arm, comprise lower edge forked standard, lower edge jaw, spring cotter be connected bearing pin, lower edge forked standard is provided with interior engaging lug and outer engaging lug, interior engaging lug is provided with endoporus, outer engaging lug is provided with exit orifice, lower edge jaw is provided with engaging lug, institute's engaging lug is provided with connecting bore, connect bearing pin successively through exit orifice, connecting bore and endoporus, described connection bearing pin is provided with pin-and-hole, described spring cotter inserts in the pin-and-hole connecting bearing pin.But because engaging lug in lower edge forked standard is not identical with the opening diameter of outer engaging lug, only adopt the connection bearing pin of prior art that aforementioned lower edge forked standard cannot be made reliably to be connected with lower edge jaw.Therefore also do not have one to open in prior art and can adapt to the outer engaging lug of lower edge forked standard and outer engaging lug different pore size, the jib for tower crane lower edge connection structure making the connection of crane arm lower edge more reliable and more stable.
Utility model content
Technical problem to be solved in the utility model is to provide one can adapt to the outer engaging lug of lower edge forked standard and outer engaging lug different pore size, the jib for tower crane lower edge connection structure making the connection of crane arm lower edge more reliable and more stable.
For solving the problems of the technologies described above, the jib for tower crane lower edge connection structure that the utility model adopts, comprise lower edge forked standard, lower edge jaw, spring cotter be connected bearing pin, described lower edge forked standard is provided with interior engaging lug and outer engaging lug, described interior engaging lug is provided with endoporus, described outer engaging lug is provided with exit orifice, described lower edge jaw is provided with engaging lug, described engaging lug is provided with connecting bore, described connection bearing pin is successively through exit orifice, connecting bore and endoporus, described connection bearing pin is provided with pin-and-hole, described spring cotter inserts in the pin-and-hole connecting bearing pin, described connection bearing pin is successively by external ear shaft part, inner ear shaft part and bearing pin section composition, described bearing pin section is truncated cone-shaped, described pin-and-hole is arranged in bearing pin section, described external ear section coordinates with exit orifice, described inner ear section and inner hole.
Further, also comprise pin shaft baffle, described pin shaft baffle is arranged on interior engaging lug, and described pin shaft baffle is provided with stop surface, and described bearing pin section is provided with fitting surface, and described fitting surface and stop surface are fitted.
Further, the junction of described external ear shaft part and inner ear shaft part is provided with transition arc.
The beneficial effects of the utility model: because the diameter of bore on engaging lug in lower edge forked standard is less than the diameter of the exit orifice on outer engaging lug, therefore connection bearing pin is designed to the form of the Step Shaft be made up of the shaft part of different-diameter by the utility model.The diameter of its Middle inner ear shaft part is consistent with endoporus, so as with endoporus precise match; The diameter of external ear section is consistent with exit orifice, so as with exit orifice precise match.The precise match while that such employing one connecting the endoporus and exit orifice that bearing pin just can be different from diameter, makes the forked standard of lower edge can accurately be connected with jaw, and can ensure that lower edge jaw can lower edge forked standard stable rotation relatively.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Parts, position and numbering in figure: lower edge forked standard 1, lower edge jaw 2, connection bearing pin 3, endoporus 4, exit orifice 5, connecting bore 6, external ear shaft part 7, inner ear shaft part 8, bearing pin section 9, pin shaft baffle 10, fitting surface 11, stop surface 12.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, jib for tower crane lower edge connection structure of the present utility model, comprise lower edge forked standard 1, lower edge jaw 2, spring cotter be connected bearing pin 3, described lower edge forked standard 1 is provided with interior engaging lug and outer engaging lug, described interior engaging lug is provided with endoporus 4, described outer engaging lug is provided with exit orifice 5, described lower edge jaw 2 is provided with engaging lug, described engaging lug is provided with connecting bore 6, described connection bearing pin 3 is successively through exit orifice 5, connecting bore 6 and endoporus 4, described connection bearing pin 3 is provided with pin-and-hole, described spring cotter inserts in the pin-and-hole connecting bearing pin 3, described connection bearing pin 3 is successively by external ear shaft part 7, inner ear shaft part 8 and bearing pin section 9 form, described bearing pin section 9 is truncated cone-shaped, described pin-and-hole is arranged in bearing pin section 9, described external ear section coordinates with exit orifice 5, described inner ear section coordinates with endoporus 4.Because endoporus 4 diameter on engaging lug in lower edge forked standard 1 is less than the diameter of the exit orifice 5 on outer engaging lug, therefore connection bearing pin 3 is designed to the form of the Step Shaft be made up of the shaft part of different-diameter by the utility model.The diameter of its Middle inner ear shaft part 8 is consistent with endoporus 4, so as with endoporus 4 precise match; The diameter of external ear section is consistent with exit orifice 5, so as with exit orifice 5 precise match.Such employing one connects the endoporus 4 and precise match while of exit orifice 5 that bearing pin 3 just can be different from diameter, and the forked standard of lower edge can be accurately connected with jaw, and can ensure that lower edge jaw 2 can lower edge forked standard 1 stable rotation relatively.
Also comprise pin shaft baffle 10, described pin shaft baffle 10 is arranged on interior engaging lug, and described pin shaft baffle 10 is provided with stop surface 12, and described bearing pin section 9 is provided with fitting surface 11, and described fitting surface 11 is fitted with stop surface 12.After connection bearing pin 3 assembles, its fitting surface 11 is just in time fitted with stop surface 12, when connection bearing pin 3 is by the stop of the stop surface 12 that can be subject to when the trend of rotating along its axis on pin shaft baffle 10, can not rotates under external force, add the stability of connection structure.
Described external ear shaft part 7 is provided with transition arc with the junction of inner ear shaft part 8.The transition arc arranged in junction can be different shaft part smooth transitions, can effectively prevent stress from concentrating.
Claims (3)
1. jib for tower crane lower edge connection structure, comprise lower edge forked standard (1), lower edge jaw (2), spring cotter be connected bearing pin (3), described lower edge forked standard (1) is provided with interior engaging lug and outer engaging lug, described interior engaging lug is provided with endoporus (4), described outer engaging lug is provided with exit orifice (5), described lower edge jaw (2) is provided with engaging lug, described engaging lug is provided with connecting bore (6), described connection bearing pin (3) is successively through exit orifice (5), connecting bore (6) and endoporus (4), described connection bearing pin (3) is provided with pin-and-hole, described spring cotter inserts in the pin-and-hole connecting bearing pin (3), it is characterized in that: described connection bearing pin (3) is successively by external ear shaft part (7), inner ear shaft part (8) and bearing pin section (9) composition, described bearing pin section (9) is truncated cone-shaped, described pin-and-hole is arranged in bearing pin section (9), described external ear section coordinates with exit orifice (5), described inner ear section coordinates with endoporus (4).
2. jib for tower crane lower edge connection structure as claimed in claim 1, it is characterized in that: also comprise pin shaft baffle (10), described pin shaft baffle (10) is arranged on interior engaging lug, described pin shaft baffle (10) is provided with stop surface (12), described bearing pin section (9) is provided with fitting surface (11), and described fitting surface (11) and stop surface (12) are fitted.
3. jib for tower crane lower edge connection structure as claimed in claim 1, is characterized in that: described external ear shaft part (7) is provided with transition arc with the junction of inner ear shaft part (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235405.3U CN204714405U (en) | 2015-04-17 | 2015-04-17 | Jib for tower crane lower edge connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520235405.3U CN204714405U (en) | 2015-04-17 | 2015-04-17 | Jib for tower crane lower edge connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204714405U true CN204714405U (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520235405.3U Active CN204714405U (en) | 2015-04-17 | 2015-04-17 | Jib for tower crane lower edge connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204714405U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834607A (en) * | 2016-05-16 | 2016-08-10 | 天津市奥联特钢结构安装工程有限公司 | Heavy type tower crane section assembling table and assembling method |
-
2015
- 2015-04-17 CN CN201520235405.3U patent/CN204714405U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834607A (en) * | 2016-05-16 | 2016-08-10 | 天津市奥联特钢结构安装工程有限公司 | Heavy type tower crane section assembling table and assembling method |
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Legal Events
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |