Heavy-duty spring damper

Abstract

The utility model provides a kind of heavy spring buffer, including movable plate, fixed plate, bolt, isolating sleeve and two first springs, the movable plate is located the top of fixed plate, movable plate and fixed plate are set through-hole, the bolt is set through the through-hole of movable plate and fixed plate, two first springs and isolating sleeve are all movably sleeved on the part between movable plate and fixed plate of bolt, and two first springs are arranged on the both sides of isolating sleeve.In the utility model, the spring of heavy buffer is split set: including two first springs, isolating sleeve is set between two first springs, through two first spring joint operation, ensure the buffering effect of buffer, and the distortion of respective middle position when two springs are compressed is smaller, ensure the service life of buffer.

Description

Technical Field

[0001] This utility model belongs to the field of spring buffers, and in particular relates to a heavy-duty spring buffer. Background Technology

[0002] In production and daily life, heavy-duty buffers are installed on heavy equipment such as tape roll carriers, excavator transport vehicles, and elevators to buffer the impact force when the heavy equipment is subjected to impacts, such as when placing tape rolls, excavators, or elevator cars suddenly and rapidly falling, thus protecting the equipment.

[0003] To improve the load-bearing capacity of heavy-duty spring buffers, i.e., to enhance their buffering capacity, current methods primarily rely on increasing the length of the spring. However, when a longer spring is subjected to a large load impact, the increased number of coils and the less accurate positioning of the coils during winding lead to uneven stress within the spring. This causes the spring to twist, typically occurring in the middle. Prolonged and frequent deformation at this point can lead to fatigue failure, making the buffer unusable. Utility Model Content

[0004] In view of this, the present invention aims to provide a heavy-duty spring buffer to ensure the service life of the spring in the heavy-duty buffer and to ensure the normal operation of the heavy-duty buffer.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A heavy-duty spring damper includes a movable plate, a fixed plate, a bolt, an isolation sleeve, and two first springs. The movable plate is located above the fixed plate, and the movable plate and the fixed plate are provided with through holes facing each other. The bolt is provided through the through holes of the movable plate and the fixed plate. The two first springs and the isolation sleeve are all movably fitted on the bolt located between the movable plate and the fixed plate, and the two first springs are arranged on both sides of the isolation sleeve.

[0007] Furthermore, the two first springs are springs of the same model.

[0008] Furthermore, the thread on the bolt is located at the tail end, passing through the through hole of the fixing plate, and a matching nut is installed thereafter. The remaining part of the bolt is a smooth rod structure.

[0009] Both first springs and isolation sleeves are fitted onto the smooth rod structure of the bolt.

[0010] Furthermore, the isolation sleeve includes a sleeve body and outer eaves respectively provided at its top and bottom, with two first springs each supporting the corresponding outer eaves.

[0011] Furthermore, a second spring is fitted onto the portion of the bolt that extends out of the fixing plate.

[0012] Furthermore, the bolt has a washer between the second spring and the bolt's nut.

[0013] Furthermore, spring seats are respectively provided on the bottom surface of the movable plate and the fixed plate, and positioning grooves are respectively opened for the first springs corresponding to the two spring seats, and the first springs are embedded in the corresponding positioning grooves.

[0014] Compared with the prior art, the heavy-duty spring buffer described in this utility model has the following advantages:

[0015] In this invention, the spring of the heavy-duty buffer is designed in a split configuration: it includes two first springs with an isolation sleeve between them. Compared with the integral spring, the semi-integral spring has a shorter length and more uniform force distribution between the spring coils. This solves the problem of severe torsion at the middle position of the spring when the buffer uses an integral spring and is prone to occur under heavy loads. This invention ensures the buffering effect of the buffer by having two first springs work together, and the torsional deformation at the middle position of each spring is small when compressed, thus ensuring the service life of the buffer. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 This is a front view of a heavy-duty spring buffer according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the internal structure of a heavy-duty spring buffer according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the isolation sleeve structure in this example.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1-Moving plate; 2-Fixed plate; 3-Bolt; 4-First spring; 5-Isolation sleeve; 51-Main body; 52-Outer eaves; 6-Spring seat; 7-Second spring; 8-Nut; 9-Washer plate. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 , Figure 2As shown, a heavy-duty spring damper includes a movable plate 1, a fixed plate 2, a bolt 3, an isolation sleeve 5, and two first springs 4. The movable plate 1 is located above the fixed plate 2. The movable plate 1 and the fixed plate 2 are provided with through holes facing each other. The bolt 3 passes through the through holes of the movable plate 1 and the fixed plate 2 in sequence and is then screwed with a matching nut 8. A spring washer is provided between the bolt 3 and the movable plate 1. The two first springs 4 are springs of the same model. The two first springs 4 and the isolation sleeve 5 are all movably fitted on the bolt 3 at the position between the movable plate 1 and the fixed plate 2, and the two first springs 4 are arranged on both sides of the isolation sleeve 5, which separates the two first springs 4.

[0024] In this invention, the movable plate 1 can move relative to the fixed plate 2. When the movable plate 1 is subjected to a large load impact, the two first springs 4 and the isolation sleeve 5 work together to give the buffer a greater buffering effect. Under the same buffering force, compared with the buffer with an integrated spring structure, this invention uses two spring structures, which is equivalent to using a split spring structure. Since the split spring, i.e., the first spring, has a smaller number of turns, the force is more uniform. Under a large impact load, its torsion is much smaller than that of the integrated spring, resulting in less damage. Therefore, it has a longer service life, ensuring the normal use of the buffer.

[0025] In this invention, the thread on the bolt 3 is located at the tail end, passing through the through hole of the fixing plate 2, and a matching nut 8 is installed thereafter. The remaining part of the bolt is a smooth rod structure. The two first springs 4 and the isolation sleeve 5 are all fitted onto the smooth rod structure of the bolt. This structure ensures that the first spring 4 can deform evenly when compressed, thus improving the service life of the first spring 4. Simultaneously, spring seats 10 are respectively provided on the bottom surface of the movable plate 1 and the fixing plate 2. Each of the two spring seats 10 has a positioning groove corresponding to its respective first spring 4, and the first spring 4 is embedded in the corresponding positioning groove. This structure prevents the first spring 4 from radially shifting, ensuring even force distribution under pressure and further improving its service life.

[0026] In this utility model, the structure of the isolation sleeve 5 is as follows: Figure 3 As shown, it includes a sleeve body 51 and outer eaves 52 respectively provided on its top and bottom. After assembly, the two first springs 4 are supported by their respective outer eaves 52.

[0027] In this invention, a second spring 7 is fitted onto the part of the bolt 3 that protrudes from the fixing plate 2. A plate 9 is placed between the bolt 3 and the second spring 7 and the nut 8 of the bolt 3. After the load on the buffer is unloaded, the second spring 7 acts to reset the movable plate 1 to buffer the load, protect the nut 8, and also reduce noise.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heavy-duty spring buffer, characterized in that: The device includes a movable plate (1), a fixed plate (2), a bolt (3), an isolation sleeve (5), and two first springs (4). The movable plate (1) is located above the fixed plate (2). The movable plate (1) and the fixed plate (2) have through holes facing each other. The bolt (3) passes through the through holes of the movable plate (1) and the fixed plate (2). The two first springs (4) and the isolation sleeve (5) are movably fitted on the bolt (3) located between the movable plate (1) and the fixed plate (2). The two first springs (4) are arranged on both sides of the isolation sleeve (5).

2. A heavy-duty spring buffer according to claim 1, characterized in that: The two first springs (4) are springs of the same model.

3. A heavy-duty spring buffer according to claim 1, characterized in that: The thread on the bolt (3) is set at the tail end, and after passing through the through hole of the fixing plate (2), a matching nut (8) is installed. The remaining part of the bolt is a smooth rod structure. Both first springs (4) and the isolation sleeve (5) are fitted onto the smooth rod structure of the bolt.

4. A heavy-duty spring buffer according to claim 3, characterized in that: The isolation sleeve (5) includes a sleeve body (51) and outer eaves (52) respectively provided on its top and bottom, and two first springs (4) are supported by the corresponding outer eaves (52).

5. A heavy-duty spring buffer according to claim 1, characterized in that: The second spring (7) is fitted onto the part of the bolt (3) that protrudes from the fixing plate (2).

6. A heavy-duty spring buffer according to claim 5, characterized in that: The bolt (3) is placed between the second spring (7) and the nut (8) of the bolt (3) and the washer (9).

7. A heavy-duty spring buffer according to claim 1, characterized in that: The bottom surface of the movable plate (1) and the fixed plate (2) are respectively provided with spring seats (10), and the two spring seats (10) respectively have positioning grooves for their corresponding first springs (4), and the first springs (4) are embedded in the corresponding positioning grooves.

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