Pitch angle indicating device of tower crane
By designing the pitch angle indicator device of the tower crane, using the combination of a fan ruler and a pointer, the problem of inconvenience in measuring pitch angle of the tower crane in the prior art is solved, which improves safety and reduces costs.
Patent Information
- Application Number
- CN202422400478.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-30
AI Technical Summary
When measuring the pitch angle of the existing tower crane, it is difficult for mechanical level to be observed in the cab, and electronic level is costly and difficult to meet actual needs.
A pitch angle indicator device for tower cranes is designed, including a fan ruler, a pointer and a rotation connecting shaft. The fan ruler can be detached and installed on the chord of the tower crane. The pointer is rotatably connected to the fan ruler through the rotation connecting shaft, and the needle tip is freely sagging toward the ground.
Through the coordination of the fan ruler and the pointer, it is convenient to observe and judge the pitch angle of the chord in the cab, improve the safety of the tower crane during cargo lifting, and the installation position can be selected based on experience to adapt to the habits of different drivers.
Smart Images
Figure CN223032940U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of construction, and particularly relates to a pitching angle indicating device for a tower crane. Background Art
[0002] During the use of a tower crane, it is often necessary to observe and judge the pitching angle of the jib. In the prior art, a spirit level is often used for measurement. However, when a mechanical spirit level is installed on the boom, since the bubble for indication is small, it is very difficult to observe the horizontal position in the cab. Although an electronic spirit level can display numerical values through a display, its cost is relatively high.
[0003] Therefore, it is necessary to design a pitching angle indicating device suitable for a tower crane. Summary of the Utility Model
[0004] In order to solve the above problems existing in the prior art, this solution provides a pitching angle indicating device for a tower crane.
[0005] The technical solution adopted by the utility model is as follows:
[0006] A pitching angle indicating device for a tower crane includes a sector scale, a pointer, and a rotating connection shaft; the sector scale is detachably and vertically installed on the chord of the tower crane, and an arc-shaped scale area is arranged on the surface of the sector scale; the rotating connection shaft is arranged at the center of the arc of the scale area; the handle end of the pointer is rotatably connected to the sector scale through the rotating connection shaft, and the tip of the pointer hangs freely and points to the ground.
[0007] As an alternative or supplement to the above pitching angle indicating device: the tip of the pointer extends into the scale area.
[0008] As an alternative or supplement to the above pitching angle indicating device: a counterweight is arranged in the middle or lower part of the pointer.
[0009] As an alternative or supplement to the above pitching angle indicating device: the angular range of the scale area is 0° - 90°.
[0010] As an alternative or supplement to the above pitching angle indicating device: in the scale area, the identification colors in the ranges of 0° - 5° and 85° - 90° are different from those in the range of 5° - 85°.
[0011] As an alternative or supplement to the above pitching angle indicating device: an installation frame is fixed on the sector scale, and a hoop is arranged on the installation frame, and the hoop can be detachably connected to the chord.
[0012] As an alternative or supplement to the above pitching angle indicating device: the installation frame is parallel to the horizontal direction, and a plurality of hoops are arranged at different positions on the installation frame.
[0013] As an alternative or supplement to the above-mentioned pitch angle indicating device: a ball bearing is provided between the pointer and the rotating connection shaft or between the rotating connection shaft and the sector scale.
[0014] The beneficial effects of the present utility model are as follows:
[0015] 1. In this solution, through the cooperation of the sector scale and the pointer, it is possible to always keep the pointer facing down during the pitching movement of the sector scale along with the tower crane chord, thus facilitating the observation and judgment of the pitching angle of the chord from the cab and improving the safety of the tower crane during the cargo hoisting process;
[0016] 2. In this solution, the sector scale is detachably connected to the chord, and the driver can choose the installation position of the sector scale according to his own experience and habits, so that the driver can get started with the newly used tower crane faster. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present solution or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.
[0018] Figure 1 It is a schematic structural diagram of the pitch angle indicating device of the tower crane in this solution.
[0019] In the figure: 1 - sector scale; 11 - scale area; 2 - pointer; 21 - counterweight part; 3 - mounting bracket; 4 - hoop; 5 - rotating connection shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The following will clearly and completely describe the technical solutions in the embodiments in conjunction with the drawings. The described embodiments are only a part of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection scope of this solution.
[0021] Embodiment 1
[0022] As Figure 1 shown, this embodiment designs a pitch angle indicating device for a tower crane, including components such as a sector scale 1, a pointer 2, and a rotating connection shaft 5.
[0023] The sector scale 1 is in a plate shape, and an arc-shaped scale area 11 is provided on the surface of the sector scale 1; a sector-shaped hollow hole can be provided in the middle of the sector scale 1 to reduce the weight of the sector scale 1. The angular range of the scale area 11 is generally 0° - 90°; in the scale area 11, the identification colors in the intervals of 0° - 5° and 85° - 90° are different from those in the interval of 5° - 85°.
[0024] In use, the sector scale 1 is detachably and vertically installed on the chord of the tower crane.
[0025] The pointer 2 is in the shape of a long needle with one end large and one end small. The handle end of the pointer 2 is rotatably connected to the sector scale 1 through a rotating connection shaft 5. The tip of the pointer 2 freely hangs down under the action of gravity and points to the ground. The tip of the pointer 2 extends to the scale area 11. A counterweight part 21 is arranged in the middle or lower part of the pointer 2, so as to increase the weight of the pointer 2 and reduce the frictional resistance at the rotating connection shaft 5, and the influence on the relative rotation of the pointer 2 and the sector scale 1.
[0026] A ball bearing is arranged between the pointer 2 and the rotating connection shaft 5 or between the rotating connection shaft 5 and the sector scale 1, so as to further reduce the frictional resistance at the rotating connection shaft 5.
[0027] The rotating connection shaft 5 is arranged at the center of the arc of the scale area 11, so as to improve the accuracy of the indication position of the pointer 2.
[0028] An installation frame 3 is fixed on the sector scale 1. A hoop 4 is arranged on the installation frame 3, and the hoop 4 can be detachably connected to the chord. The installation frame 3 is parallel to the horizontal direction, and a plurality of hoops 4 are arranged at different positions on the installation frame 3.
[0029] The above embodiments are only examples for clear illustration and are not limitations on the implementation manners; it is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present technology.
Claims
1. A pitch angle indicating device for a tower crane, characterized in that: The invention comprises a sector ruler (1), a pointer (2) and a rotating connecting shaft (5); the sector ruler (1) is detachably mounted vertically on a chord of a tower crane, and an arc-shaped scale area (11) is arranged on the surface of the sector ruler (1); the rotating connecting shaft (5) is arranged at the arc center of the scale area (11); the handle end of the pointer (2) is rotatably connected to the sector ruler (1) via the rotating connecting shaft (5), and the needle tip of the pointer (2) hangs freely and points to the ground.
2. The pitch angle indicating device of a tower crane according to claim 1, characterized in that: The needle tip of the pointer (2) extends to the scale area (11).
3. The pitch angle indicating device of a tower crane according to claim 1, characterized in that: A counterweight portion (21) is provided in the middle or lower portion of the pointer (2).
4. The pitch angle indicating device of a tower crane according to claim 1, characterized in that: The angle range of the scale area (11) is 0°-90°.
5. The pitch angle indicating device of a tower crane according to claim 4, characterized in that: In the scale area (11), the marking colors of the 0°-5° and 85°-90° intervals are different from those of the 5°-85° intervals.
6. The pitch angle indicating device for a tower crane according to any one of claims 1 to 5, characterized in that: A mounting frame (3) is fixed on the sector ruler (1), and a clamp (4) is arranged on the mounting frame (3), and the clamp (4) can be detachably connected to the chord rod.
7. The pitch angle indicating device of a tower crane according to claim 6, characterized in that: The mounting frame (3) is parallel to the horizontal direction, and a plurality of clamps (4) are arranged at different positions of the mounting frame (3).
8. The pitch angle indicating device of a tower crane according to claim 6, characterized in that: A ball bearing is provided between the pointer (2) and the rotating connecting shaft (5) or between the rotating connecting shaft (5) and the sector ruler (1).