阅读说明：本技术 一种大载荷分级缓冲减载装置 (Large-load grading buffering load-reducing device ) 是由 张鹏 叶安东 谷庆风 周昊 文吉标 冯志杰 黄艳平 胥国成 方媛 穆洲 于 2019-11-18 设计创作，主要内容包括：本发明提供了一种大载荷分级缓冲减载装置,包括挂耳外壳(1)、减载壳体(2)、拉杆(3)、活塞(4),挂耳外壳(1)包括外侧挂耳部(11)和腔体部(12),外侧挂耳部(11)与上段承载连接带(6)连接；减载壳体(2)与挂耳外壳(1)内侧螺纹连接,内侧为滑动通道(21)上设有减载台阶一(8)和减载台阶二(9)；拉杆(3)包括与下段承载连接带(7)穿接的端头挂耳部(31)和主杆部(32),主杆部(32)与活塞(4)连接,拉杆(3)穿入减载壳体(2)使活塞螺母(4)卡在减载台阶一(8)上限制拉杆(3)的位置,减载台阶一在外力作用下瞬间被拉断实现减载。(The invention provides a large-load grading buffering and load-reducing device which comprises a suspension loop shell (1), a load-reducing shell (2), a pull rod (3) and a piston (4), wherein the suspension loop shell (1) comprises an outer suspension loop part (11) and a cavity part (12), and the outer suspension loop part (11) is connected with an upper-section bearing connecting belt (6); the load reduction shell (2) is in threaded connection with the inner side of the hanger shell (1), and a first load reduction step (8) and a second load reduction step (9) are arranged on a sliding channel (21) on the inner side; the pull rod (3) comprises an end lug part (31) and a main rod part (32) which are connected with the lower section bearing connecting belt (7) in a penetrating mode, the main rod part (32) is connected with the piston (4), the pull rod (3) penetrates into the load reduction shell (2) to enable the piston nut (4) to be clamped at the position of the limiting pull rod (3) on the load reduction step I (8), and the load reduction step I is pulled off instantly under the action of external force to achieve load reduction.)

1. A large-load grading buffering load-shedding device is characterized by comprising a hanger shell (1), a load-shedding shell (2), a pull rod (3) and a piston (4),

the hanger shell (1) comprises an outer side hanger part (11) and a cavity part (12), the outer side hanger part (11) is connected with the upper section bearing connecting belt (6), and the inner side of the cavity part (12) is provided with an internal thread;

the outer side of the load reduction shell (2) is of a threaded structure and is in threaded connection with the inner side of the hanger shell (1), the inner side of the load reduction shell is provided with a sliding channel (21), and a first load reduction step (8) and a second load reduction step (9) are arranged on the sliding channel (21);

pull rod (3), including end hangers portion (31) and main rod portion (32), end hangers portion (31) bear connecting band (7) cross-under with the hypomere, main rod portion (32) end is the external screw thread, is connected with piston (4), and all the other positions are the polished rod structure, pull rod (3) penetrate to subtract and carry casing (2) to make piston nut (4) card is on subtracting and carries step (8), the position of restriction pull rod (3), it is broken in the twinkling of an eye under the exogenic action to carry step (8) to carry to realize carrying.

2. A large-load graded buffering and load-reducing device according to claim 1, characterized in that the sliding channel (21) is provided with a plurality of steps for reducing load, and the pull rod (3) moves axially along the sliding channel (21) after being loaded, so that the steps for reducing load are broken sequentially.

3. A high load stepped cushioning load shedding device according to claim 2, wherein the load shedding step is two steps, the first step being a first load shedding step (8) and the second step being a second load shedding step (9).

4. A high load stepped cushioning and load shedding device according to claim 1, wherein said sliding channel (21) is cylindrical.

5. A high load stepped cushioning and load shedding device according to claim 1, characterized in that the piston (4) has a profile adapted to the profile of the sliding channel (21).

6. A high load grading cushioning relief device according to claim 1, characterized in that the bottom end of the relief housing (2) is provided with a cushion pad (5).

7. A high load grading cushioning relief device according to claim 1, characterized in that said cushioning pad (5) is a circular washer made of rubber material.

8. A high load stepped cushioning load relief device according to claim 1, characterized in that said piston (4) is initially restrained in a top position of the relief housing (2) by a relief step (8).

Technical Field

The invention relates to a load shedding device, in particular to a large-load grading buffering load shedding device.

Background

The load-bearing connecting belt is used for connecting two or more devices with an action relationship, and carrying and transmitting load between the devices. The bearing connecting belt is generally made of high-strength fabric or fabric and metal mixed weaving and the like, and has been widely applied to various bearing environments due to the characteristics of high strength, light weight, good bending performance and the like of the bearing connecting belt.

If the bearing connecting belt is used in a static pulling environment, the strength of the body is required, but if the bearing connecting belt is used in a dynamic impact environment, the instantaneous load is far higher than the strength of the body of the connecting belt, especially under the environment of loading over hundred tons of force, the bearing connecting belt is required to have high design strength, and the problem of other aspects can be caused by the overhigh design strength, such as the increase of the thickness and the width of the connecting belt, and the folding or the placement in a limited space is not facilitated. In order to reduce the design strength of the load-bearing connecting belt and eliminate the risk of breakage as much as possible, so that the load-bearing connecting belt can meet the environmental requirement of dynamic impact, a load balancing structure needs to be added on the load-bearing connecting belt for reducing the instantaneous load of the load-bearing connecting belt.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a grading buffering load-reducing device of a large-load bearing connecting belt, which solves the problem that the bearing connecting belt is broken due to overlarge load by reducing the instantaneous impact load of the bearing connecting belt, so that the grading buffering load-reducing device can adapt to a complex impact use environment and ensure that the bearing connecting belt is complete in structure and normal in function.

The technical scheme of the invention is as follows:

a large-load grading buffering and load-reducing device comprises a suspension loop shell, a load-reducing shell, a pull rod and a piston, wherein the suspension loop shell comprises an outer suspension loop part and a cavity part, the outer suspension loop part is connected with an upper section bearing connecting belt, and the inner side of the cavity part is provided with an internal thread; the outer side of the load reduction shell is of a threaded structure and is in threaded connection with the inner side of the hanger shell, the inner side of the load reduction shell is a sliding channel, and a first load reduction step and a second load reduction step are arranged on the sliding channel; the pull rod comprises an end lug part and a main rod part, the end lug part and the lower segment bear a connecting band in a penetrating mode, the tail end of the main rod part is provided with an external thread and is connected with a piston, the rest parts are of polished rod structures, the pull rod penetrates into a load reduction shell to enable a piston nut to be clamped on a load reduction step I to limit the position of the pull rod, and the load reduction step I is pulled off instantly under the action of external force to achieve load reduction.

In the scheme, the sliding channel is provided with a plurality of stages of load reduction steps, and the pull rod moves axially along the sliding channel after being loaded, so that the load reduction steps are broken sequentially.

In the scheme, the load shedding steps are two stages, the first stage is a first load shedding step, and the second stage is a second load shedding step.

In the above scheme, the sliding channel is cylindrical.

In the above scheme, the outer shape of the piston is matched with the outer shape of the sliding channel.

In the scheme, the bottom end of the load reduction shell is provided with the cushion pad.

In the above scheme, the buffer pad, the circular washer made of rubber material, is used as the buffer protection when the piston nut slides to the bottom end of the relief shell.

In the scheme, the piston is limited at the top end of the load relief shell by the load relief step in the initial state.

The invention has the beneficial effects that:

the grading buffering load-reducing device solves the problem that a large-load bearing connecting belt bears overlarge load in a complex impact environment, is used for reducing the instantaneous load of the bearing connecting belt and ensures that the bearing connecting belt is complete in structure and normal in function.

The flexible fabric is different from a common spring type or hydraulic type structure, is suitable for a large-load bearing environment, has a simpler structure, is more easily matched with a flexible fabric type of a bearing connecting belt, and does not occupy more assembly space; the multi-level buffering load reduction can be designed according to the load requirements under different environments, so that different load reduction effects are achieved, and the bearing connecting belt can meet the use requirements under different environments; and can improve hierarchical buffering load reduction device's reuse rate through changing the load reduction casing, the installation with dismantle convenient and fast, this structure can be widely used in more bearing operational environment, application prospect is extensive.

The invention provides novel and reliable reference experience for the design of bearing the large load of the connecting belt in the complex impact resistant environment.

Drawings

Fig. 1 is a schematic structural diagram of a large-load grading buffering and load-reducing device of the invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1 in accordance with the present invention.

Fig. 3 is a schematic view of the structure of the hanger case of the present invention.

Fig. 4 is a sectional view taken along line a-a of fig. 3 in accordance with the present invention.

Fig. 5 is a schematic view of the structure of the load relief housing of the present invention.

Fig. 6 is a sectional view taken along line a-a of fig. 5 in accordance with the present invention.

Fig. 7 is a schematic view of the structure of the pull rod of the present invention.

Fig. 8 is a sectional view taken along line a-a of fig. 7 in accordance with the present invention.

Fig. 9 is a schematic view of the piston structure of the present invention.

FIG. 10 is a schematic view of the cushion structure of the present invention.

FIG. 11 is a schematic view of the connection of the load-bearing connection belt of the present invention with a staged cushioning and load-shedding device.

Wherein, 1-the hangers shell; 11-outer ears; 12-a cavity portion; 2-a relief housing; 21-a sliding channel; 3-a pull rod; 31-end ear hanging; 32-a main stem portion; 4-a piston; 5-a buffer pad; 6-the upper section bears the connecting belt; 7-a lower section bears a connecting belt and 8-a first load-reducing step; 9-relief step two.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

the grading buffering load-reducing device for the large-load bearing connecting belt is used for solving the problem that the large-load bearing connecting belt bears overlarge load in a complex impact environment, reducing the instantaneous load of the bearing connecting belt and ensuring that the bearing connecting belt is complete in structure and normal in function.

A large-load grading buffering and load-reducing device divides a bearing connecting belt into two sections, wherein one section is an upper connecting belt, and the other section is a lower connecting belt. The load reduction device comprises a suspension loop shell 1, a load reduction shell 2, a pull rod 3 and a piston nut 4, wherein the suspension loop shell 1 comprises an outer suspension loop part 11 and a cavity part 12, the outer suspension loop part 11 is connected with an upper section bearing connecting belt 6, and the inner side of the cavity part 12 is provided with an internal thread; the outer side of the load reduction shell 2 is of a threaded structure and is in threaded connection with the inner side of the hanger shell 1, the inner side of the load reduction shell is provided with a sliding channel 21, and load reduction steps 8 and 9 are arranged on the sliding channel 21; pull rod 3, including end hangers portion 31 and mobile jib portion 32, end hangers portion 31 bears connecting band 7 cross-under with the hypomere, the end of mobile jib portion 32 is the external screw thread, is connected with piston nut 4, and all the other positions are the polished rod structure, pull rod 3 penetrates and subtracts the casing 2 messenger piston nut 4 card is on subtracting a year step 8, restriction pull rod 3's position, subtract year step 8 and can break in the twinkling of an eye under the exogenic action.

The sliding channel 21 is cylindrical and is provided with a load reduction step, and the pull rod can axially move along the sliding channel 21 after being loaded, so that the load reduction step is broken. The load shedding step is two stages, the first stage is a first load shedding step 8, and the second stage is a second load shedding step 9.

The piston 4 is limited at the top end of the load relief shell 2 by a load relief step I8, and the shape of the piston is matched with that of the sliding channel 21.

The bottom end of the load relief shell 2 is provided with a cushion pad 5, and the cushion pad 5 is a circular washer made of rubber materials.

The working principle of the invention is as follows: the outer side ear hangers at the two ends of the grading buffering load reduction device and the end ear hangers at the two ends of the grading buffering load reduction device are respectively connected with the bearing connecting belt in a penetrating manner, so that the effect of reducing load on the bearing connecting belt can be achieved. The end and the upper segment of hangers shell 1 bear connecting band 6 and are connected, and deloading casing 2 passes through the screw thread and is connected with the hangers shell, and pull rod 3 penetrates the deloading casing, and the end is injectd the pull rod with 4 spiro unions of piston and is moved in the inboard passageway of deloading casing.

In an initial state, the piston is limited at the top end of the load relief shell by the first-stage load relief step 8; when the external work is carried, the connecting belt is loaded, the grading buffering and load reducing device is positioned between the upper and lower sections of the bearing connecting belt, so that the acting force of the two sections of the bearing connecting belt is opposite, the load is mainly concentrated on the grading buffering and load reducing device, the load on the lower section of the bearing connecting belt 7 is transmitted to the piston through the pull rod, the load on the piston is far greater than the yield strength of the first load reducing step, the step is broken instantly, the piston can continue to move along the stress direction, the load is still large at the moment, the second load reducing step second 9 can be broken, the piston nut moves to the bottom end of the load reducing shell, and the cushion pad 5 is extruded until the. In the process that two-stage load reduction steps of the load reduction shell are continuously broken by the piston nut, the acting force time is prolonged, the instantaneous acting force is greatly reduced, namely, the acting load on the bearing connecting belt is reduced, so that the upper and lower segments of the bearing connecting belt are protected to be complete in structure and normal in connecting function, and the connecting reliability of the bearing connecting belt in a complex impact environment is improved.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.