Spring box assembled by constant-force springs

Abstract

The utility model relates to the technical field of spring boxes, in particular to a spring box assembled by constant-force springs, and aims to solve the technical problems that the width of a box body of the conventional spring box is limited and only one spring can be placed under the condition that the operation of other components is not hindered, so that the stretching distance is shorter. According to the technical scheme, the spring box assembled by the constant-force springs comprises a first constant-force spring, a second constant-force spring, a box body, a rotating assembly, a limiting assembly and a stretching assembly; the two constant-force springs which are arranged in parallel and connected are arranged in the spring box, on the premise that only the length of the spring box is changed, the width of the spring box is prevented from being increased, the telescopic pulling-back distance of the spring box can be prolonged on the premise that operation of other devices is not hindered, and the service life of the spring box is prolonged. The problems that under the condition that operation of other assemblies is not hindered, the width of a box body of an existing spring box is limited, only one spring can be placed, and the stretching distance is short are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spring boxes, and in particular relates to a spring box assembled from constant force springs. Background Art

[0002] During the use of the aerial ladder, a spring box is often needed as an auxiliary tightening device to help the aerial ladder to retract and pull back.

[0003] At present, only one caliper spring is often placed in the existing spring box, and the stretching distance is limited. If the stretching length of the caliper spring is to be extended, more turns of the caliper spring need to be placed. Such a design will cause the width of the spring box to be too wide, which will hinder the operation of other components.

[0004] Therefore, in order to address the problem that when the width is limited, only one caliper spring can be placed in the existing spring box, resulting in limited stretching length, a spring box assembled with constant force springs is designed. Without changing the width of the spring box, two connected constant force springs are arranged in the box to extend the stretching distance. Utility Model Content

[0005] In order to overcome the problem that the existing spring box has a limited width and can only accommodate one spring without hindering the operation of other components, resulting in a short stretching distance.

[0006] The technical solution of the utility model is: a spring box assembled from constant force springs, comprising a No. 1 constant force spring, a No. 2 constant force spring, a box body, a rotating assembly, a limiting assembly and a stretching assembly; a No. 2 constant force spring connected to the No. 1 constant force spring is arranged at the rear side of the No. 1 constant force spring, a box body is arranged outside the No. 1 constant force spring and the No. 2 constant force spring, a rotating assembly for adjusting the positions of the No. 1 constant force spring and the No. 2 constant force spring is arranged inside the box body, a limiting assembly is installed in the box body, and a stretching assembly connected to the No. 1 constant force spring is arranged on the box body.

[0007] Preferably, by arranging two constant force springs arranged in parallel and connected in the spring box, the distance that the spring box can be retracted and pulled back can be extended without hindering the operation of other devices. The rotating component can realize the winding and even constant force spring, and achieve the effect of stretching and contraction. The limiting component can prevent the rotating component from being offset, and the stretching component is used to apply force to the constant force spring.

[0008] Preferably, a box cover is provided at the bottom end of the box body, and anchor holes are provided on both the box body and the box cover, and anchor screws are inserted into the anchor holes. A limit ring is fixedly connected to the box body, and the box cover is tightly attached to the limit ring. Screws are used as anchor columns to pass through the anchor holes provided on the box body and the box cover to fix the box body and the box cover together. The box body and the box cover can provide protection for the internal constant force spring.

[0009] Preferably, the rotating assembly includes a rotating shaft and a limit plate; two rotating shafts facing each other front and back are arranged in the box body, and three limit plates arranged from top to bottom are fixedly connected to the rotating shafts, and the No. 1 constant force spring and the No. 2 constant force spring are respectively sleeved on the two rotating shafts, and the No. 1 constant force spring is located between the middle and lower limit plates. When the No. 1 constant force spring is pulled, the No. 1 constant force spring will pull the No. 2 constant force spring, so that the two rotating shafts rotate in opposite directions, straightening the No. 1 constant force spring and the No. 2 constant force spring to extend the length.

[0010] Preferably, the limit assembly includes a No. 1 limit sleeve and a limit column; a No. 1 limit sleeve located outside the two rotating shafts is fixedly connected to the box body, and two limit columns are fixedly connected to the box body. The rotating shaft is sleeved above the limit column, and the No. 1 limit sleeve limits the rotating shaft from the outside, and the limit column limits the rotating shaft from the inside. Under such a limit, the position of the rotating shaft will not shift when the constant force spring is stretched and retracted.

[0011] Preferably, the limit assembly also includes a No. 2 limit sleeve; the top of the box cover is fixedly connected to the No. 2 limit sleeve, and the limit column is inserted into the No. 2 limit sleeve. Through the No. 2 limit sleeve and the limit column, the box cover and the box body can be accurately positioned for docking, which can prevent the rotating shaft from sliding up and down.

[0012] Preferably, the No. 1 limit sleeve is tightly attached to the outside of the two rotating shafts, and the bottom end of the limit plate located in the middle of the rotating shaft is in the same horizontal plane as the bottom end of the No. 1 limit sleeve. This design allows the No. 1 constant force spring and the No. 2 constant force spring to be located below the No. 1 limit sleeve, and the No. 1 limit sleeve will not hinder the constant force spring during extension and pulling.

[0013] Preferably, the stretching assembly includes a stretching slot and a stretching column; a stretching slot is opened on the box body, and a stretching column connected to the No. 1 constant force spring is arranged at the front end of the stretching slot. By pulling the stretching column, the No. 1 constant force spring and the No. 2 constant force spring can be straightened and extended from the stretching slot. The stretching slot can play a certain limiting role.

[0014] Beneficial effects of the utility model:

[0015] 1. By arranging two parallel and connected constant force springs in the spring box, the width of the spring box can be avoided from being increased while only the length of the spring box is changed. The distance that the spring box can be extended and retracted can be extended without hindering the operation of other devices. The ordinary caliper spring is replaced with a constant force spring, which can provide a lasting and stable operating force through elastic deformation;

[0016] 2. The limit sleeve and the limit column can limit the movement range of the rotating shaft, so that the rotating shaft can only rotate in a fixed area, thereby increasing the stability of the spring box;

[0017] 3. The use of ladders often needs to be carried out in the wild, which is prone to rust and dust. The box body can provide protection for the internal constant force spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic diagram of a first three-dimensional structure of a spring box assembled from a constant force spring of the utility model;

[0019] Figure 2 Shown is a schematic diagram of the internal three-dimensional structure of a spring box assembled from the constant force spring of the utility model;

[0020] Figure 3 Shown is a three-dimensional structural schematic diagram of a spring box rotating assembly assembled from a constant force spring of the utility model;

[0021] Figure 4 Shown is a three-dimensional structural schematic diagram of a spring box rotating assembly and a limit assembly assembled from a constant force spring of the utility model;

[0022] Figure 5 Shown is a three-dimensional structural schematic diagram of a spring box limit assembly assembled from a constant force spring of the utility model;

[0023] Figure 6 Shown is a three-dimensional structural schematic diagram of a spring box cover assembled with constant force springs of the utility model.

[0024] Explanation of the reference numerals in the accompanying drawings: 1. Constant force spring No. 1; 2. Constant force spring No. 2; 3. Box body; 4. Box cover; 5. Limiting ring; 601. Rotating shaft; 602. Limiting plate; 701. Limiting sleeve No. 1; 702. Limiting column; 703. Limiting sleeve No. 2; 801. Stretching groove; 802. Stretching column. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1-2The utility model provides an embodiment: a spring box assembled from a constant force spring includes a No. 1 constant force spring 1, a No. 2 constant force spring 2, a box body 3, a rotating component, a limiting component and a stretching component; a No. 2 constant force spring 2 connected to the No. 1 constant force spring 1 is arranged on the rear side of the No. 1 constant force spring 1, a box body 3 is arranged on the outer sides of the No. 1 constant force spring 1 and the No. 2 constant force spring 2, a rotating component for adjusting the positions of the No. 1 constant force spring 1 and the No. 2 constant force spring 2 is arranged in the box body 3, and a stretching component connected to the No. 1 constant force spring 1 is arranged on the box body 3. By arranging two parallel and connected constant force springs in the spring box, the distance that the spring box can be retracted and pulled back can be extended without hindering the operation of other devices. The rotating component realizes winding and even constant force springs, which has the effect of stretching and contracting. The limiting component can avoid deviation of the rotating component, and the stretching component is used to apply force to the constant force spring.

[0027] See also Figure 1-4 In this embodiment, a box cover 4 is provided at the bottom of the box body 3, and anchor holes are provided on the box body 3 and the box cover 4, and anchor screws are inserted into the anchor holes. A limit ring 5 is fixedly connected to the box body 3, and the box cover 4 is close to the limit ring 5. The rotating assembly includes a rotating shaft 601 and a limit plate 602; two rotating shafts 601 facing each other are provided in the box body 3, and three limit plates 602 arranged from top to bottom are fixedly connected to the rotating shaft 601, and the constant force spring 1 and the constant force spring 2 are respectively sleeved on the two On the rotating shaft 601, the constant force spring 1 No. 1 is located between the middle and lower limit plates 602. The box body 3 and the box cover 4 are fixed together by screws as anchoring columns passing through the anchoring holes opened on the box body 3 and the box cover 4. The box body 3 and the box cover 4 will provide protection for the internal constant force spring. When the constant force spring No. 1 is pulled, the constant force spring No. 1 will pull the constant force spring No. 2, so that the two rotating shafts 601 rotate in opposite directions, straightening the constant force spring No. 1 and the constant force spring No. 2 to extend the length.

[0028] See also Figure 1 , 56. In the present embodiment, the limiting assembly includes a No. 1 limiting sleeve 701 and a limiting column 702; a No. 1 limiting sleeve 701 located outside the two rotating shafts 601 is fixedly connected in the box body 3, two limiting columns 702 are fixedly connected in the box body 3, the rotating shaft 601 is sleeved on the limiting columns 702, and the limiting assembly also includes a No. 2 limiting sleeve 703; the top of the box cover 4 is fixedly connected to the No. 2 limiting sleeve 703, the limiting column 702 is inserted into the No. 2 limiting sleeve 703, the No. 1 limiting sleeve 701 is tightly attached to the outside of the two rotating shafts 601, and the bottom end of the limiting plate 602 located in the middle of the rotating shaft 601 is in the same horizontal plane as the bottom end of the No. 1 limiting sleeve 701, and the stretching assembly includes a stretching groove 801 and a stretching column 802; a stretching groove 801 is provided on the box body 3, and a No. 1 constant force spring 1 is provided at the front end of the stretching groove 801. The connected stretching column 802, the No. 1 limiting sleeve 701 limits the rotating shaft 601 from the outside, and the limiting column 702 limits the rotating shaft 601 from the inside. Under such limiting conditions, the position of the rotating shaft 601 will not shift when the constant force spring is stretched and retracted. The No. 2 limiting sleeve 703 and the limiting column 702 can achieve accurate positioning of the box cover 4 and the box body 3, and can prevent the rotating shaft 601 from sliding up and down. This design allows the No. 1 constant force spring 1 and the No. 2 constant force spring 2 to be located below the No. 1 limiting sleeve 701. During extension and pulling, the No. 1 limiting sleeve 701 will not hinder the constant force spring. By pulling the stretching column 802, the No. 1 constant force spring 1 and the No. 2 constant force spring 2 can be driven to straighten and extend from the stretching slot 801. The stretching slot 801 can play a certain limiting role.

[0029] When working, the staff first installs the No. 1 constant force spring 1 on the rotating shaft 601, and then installs the No. 2 constant force spring 2 on another rotating shaft 601, connects the No. 1 constant force spring 1 with the No. 2 constant force spring 2, plugs the rotating shaft 601 into the limiting column 702, and then connects one end of the No. 1 constant force spring 1 to the stretching column 802, flips the box cover 4 so that the No. 2 limiting sleeve 703 is aligned with the limiting column 702, and the box cover 4 is close to the bottom of the box body 3, and then the whole spring box is turned over. Under the action of the limiting assembly, the spring will not deviate, and the anchor is passed through the anchor hole to fix the box body 3 and the box cover 4 together;

[0030] Install the spring box on the device to be used, connect the parts to be telescopic to the connecting column, pull the connecting column, the telescopic spring is pulled and the rotating shaft 601 rotates within the range defined by the limit column 702 and the No. 1 limit sleeve 701, straightens the rolled constant force spring and extends it from the stretching groove 801 to achieve the stretching effect. When the connecting column loses the external force stretching, under the elastic action of the constant force spring, the rotating shaft 601 will be retracted, and the constant force spring and the parts connected to the connecting column will be returned to their original positions.

[0031] Through the above steps, two constant force springs arranged in parallel and connected are set in the spring box. Under the premise of only changing the length of the spring box, the width of the spring box is avoided to be increased. Under the premise of not hindering the operation of other devices, the distance that the spring box can be extended and retracted can be extended. The ordinary caliper spring is replaced with a constant force spring, which can provide a long-lasting and stable operating force through elastic deformation, so as to solve the problem of the existing spring box that the width of the box body 3 is limited and only one spring can be placed without hindering the operation of other components, resulting in a short stretching distance.

[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A spring box assembled from constant force springs, comprising a first constant force spring (1), a second constant force spring (2) and a box body (3); characterized in that: The invention also comprises a rotating assembly, a limiting assembly and a stretching assembly; a No. 2 constant force spring (2) connected to the No. 1 constant force spring (1) is arranged at the rear side of the No. 1 constant force spring (1); a box body (3) is arranged outside the No. 1 constant force spring (1) and the No. 2 constant force spring (2); a rotating assembly for adjusting the positions of the No. 1 constant force spring (1) and the No. 2 constant force spring (2) is arranged inside the box body (3); a limiting assembly is installed inside the box body (3); and a stretching assembly connected to the No. 1 constant force spring (1) is arranged on the box body (3).

2. The spring box assembled from the constant force spring according to claim 1, characterized in that: A box cover (4) is arranged at the bottom end of the box body (3), and anchor holes are provided on the box body (3) and the box cover (4), and anchor screws are inserted into the anchor holes. A limit ring (5) is fixedly connected to the box body (3), and the box cover (4) is tightly attached to the limit ring (5).

3. The spring box assembled from the constant force spring according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (601) and a limiting plate (602); two rotating shafts (601) facing each other are arranged in the front and rear directions in the box body (3); three limiting plates (602) arranged from top to bottom are fixedly connected to the rotating shaft (601); a No. 1 constant force spring (1) and a No. 2 constant force spring (2) are respectively sleeved on the two rotating shafts (601); and the No. 1 constant force spring (1) is located between the middle and lower limiting plates (602).

4. The spring box assembled from the constant force spring according to claim 3, characterized in that: The limiting assembly comprises a limiting sleeve (701) and a limiting column (702); the limiting sleeve (701) located outside the two rotating shafts (601) is fixedly connected inside the box body (3); the two limiting columns (702) are fixedly connected inside the box body (3); and the rotating shaft (601) is sleeved above the limiting column (702).

5. The spring box assembled from the constant force spring according to claim 4, characterized in that: The limiting assembly also includes a second limiting sleeve (703); the top of the box cover (4) is fixedly connected to the second limiting sleeve (703), and the limiting column (702) is inserted into the inside of the second limiting sleeve (703).

6. The spring box assembled from the constant force spring according to claim 4, characterized in that: The first limiting sleeve (701) is closely attached to the outer sides of the two rotating shafts (601), and the bottom end of the limiting plate (602) located in the middle of the rotating shaft (601) is in the same horizontal plane as the bottom end of the first limiting sleeve (701).

7. The spring box assembled from the constant force spring according to claim 4, characterized in that: The stretching assembly comprises a stretching slot (801) and a stretching column (802); the box body (3) is provided with a stretching slot (801), and a stretching column (802) connected to a No. 1 constant force spring (1) is arranged at the front end of the stretching slot (801).

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