Braking anti-springback device

Abstract

The utility model provides a braking anti-rebound device, which belongs to the field of braking devices, and comprises a front fixing block, a compression spring, a guide post, a hook, a sliding block, a rear fixing block, a steel wire pull rope, an extension spring, a limiting block and a bolt, the guide post is connected with the sliding block, the compression spring is sleeved on the guide post and is connected with the front fixing block and the sliding block, the hook is connected with the sliding block, and the bolt is connected with the rear fixing block. The limiting block is fixedly connected with the lower portion of the hook, one ends of the two extension springs are hooked to the left side and the right side of the limiting block respectively, the other ends of the two extension springs are hooked to the bottom of the sliding block, and the pull rope is connected to the hook. The probability of impact fatigue fracture of the hook is reduced; the flexible buffering mode has a certain protection effect on the load and the anti-rebound device body, and adverse effects caused by hard limiting impact and collision are reduced.

Description

Technical Field

[0001] The utility model belongs to the field of braking devices, and in particular relates to a braking anti-rebound device. Background Art

[0002] Wuhan Wuchuan Heavy Equipment Engineering Co., Ltd.'s patent, CN209278299U, is titled "Anti-Rebound Device," and relates to the field of equipment self-locking. The device includes a first rotating body, a second rotating body, a collar, and an elastic member. One end of the first rotating body is provided with a slot, which is connected to the second rotating body, and the other end is connected to a stationary object, while the second rotating body is connected to a moving object. The collar encloses the first and second rotating bodies, and cooperates with the pin to achieve self-locking. Then, through the expansion and contraction characteristics of the elastic member, anti-rebound is achieved. However, this method has the following main problems:

[0003] (1) The energy generated by the actuator during the test is large, the moving load mass is large, and the speed is fast. This method is a hard limit mechanism. The first rotating body, the second rotating body, the collar, and the pin are in rigid contact, and no flexible buffering method is adopted. There is a risk of fatigue fracture of the collar and the pin.

[0004] (2) When unlocking is required, this method uses manual force to push the collar, thereby compressing the elastic member until the collar exits the second rotating body. At this time, the elastic member is in a compressed state, and the self-locked object can freely rotate around the pin axis, thereby achieving unlocking. However, the load mass of the fire-operated actuator separation test is large. If this method is used, the stiffness coefficient k of the elastic member is very large, and manual force cannot push the collar to unlock. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a flexible, simple-structured, and highly reliable braking anti-rebound device.

[0006] The above-mentioned purpose of the present invention is mainly achieved through the following technical solutions:

[0007] A braking anti-rebound device includes a front fixed block, a compression spring, a guide column, a hook, a slider, a rear fixed block, a pull rope, a tension spring, a limit block and a pin. One end of the guide column is connected to the front fixed block, and the other end is connected to the rear fixed block. The guide column passes through a through hole on the slider and is connected to the slider. The compression spring is sleeved on the guide column. One end of the compression spring is connected to the front fixed block, and the other end is connected to the slider. The hook is connected to the slider through the pin. The limit block is fixedly connected to the lower part of the hook. One end of the two tension springs is hooked on the left and right sides of the limit block respectively, and the other end is hooked on the bottom of the slider. The pull rope is connected to the hook.

[0008] It also includes an elastic circlip for the shaft, the pin is a step pin, the small end of the pin enters from one side of the slider, passes through the hook and then exits from the other side of the slider, and the elastic circlip for the shaft limits the small end of the pin.

[0009] It also includes a second screw, and the guide column is connected to the front fixing block and the rear fixing block through the screw.

[0010] It also includes a first screw and a nut, which are fixed on the front fixing block and are used to limit the extreme position of the slider during the braking process.

[0011] The front fixing block and the rear fixing block include at least one through hole, which serves as a mounting connection hole for fixing to the use area.

[0012] The guide column comprises two parallel columns, which are respectively connected to the front fixing block, the sliding block and the rear fixing block. The two compression springs are respectively sleeved on the two guide columns.

[0013] The hook is a columnar structure, the side is a triangular ring structure, the top of the front side includes a platform, and the pull rope is connected to the front side of the hook.

[0014] The slider is a square structure, with a boss provided in the middle. The boss includes a square groove, and the hook is arranged in the square groove.

[0015] The boss in the middle of the slider protrudes from the front wall surface of the slider, and through holes are provided on both sides of the protruding part. The latch passes through the through holes and is connected with the hook.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) The present invention adopts a compression spring, a guide column and a slider to replace the hard limit mechanism in the prior art, thereby avoiding rigid contact and reducing the probability of the hook being broken by impact fatigue; the flexible buffering method has a certain protective effect on the load and the anti-rebound device body, reducing the adverse effects of the hard limit impact collision;

[0018] (2) The compression spring of the brake anti-rebound device of the utility model can be replaced according to the size of the buffering energy to achieve a flexible anti-rebound function under different forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of a brake anti-rebound device in a free state according to the utility model;

[0020] Figure 2 This is a half-section view of a brake anti-rebound device in a free state according to the utility model;

[0021] Figure 3 This is a schematic diagram of the working state of a brake anti-rebound device of the utility model in a compressed state;

[0022] Figure 4 This is a schematic diagram of a load unlocking state of a braking anti-rebound device according to the present invention;

[0023] Figure 5 This is a schematic diagram of a slider of a brake anti-rebound device of the utility model;

[0024] Figure 6 This is a schematic diagram of a latch for a brake anti-rebound device according to the present invention. DETAILED DESCRIPTION

[0025] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 1 、 2 As shown in Figure 3, the utility model brake anti-rebound device includes a front fixed block 1, a compression spring 2, a guide column 3, a hook 4, a slider 5, a rear fixed block 6, a wire rope 7, a tension spring 8, a limit block 9, a latch 10, an elastic retaining ring 11 for the shaft, a first screw 12, a nut 13 and a second screw 14; the hook 4 is connected to the slider 5 through the latch 10, the small end of the latch 10 is clamped by the elastic retaining ring 11 for the shaft, the limit block 9 is connected to the lower part of the hook 4 by screws, one end of the two tension springs 8 is respectively hooked on the left and right sides of the limit block 9, and the other end is hooked on the bottom of the slider 5, the guide column 3 is inserted into the front fixed block 1 and fixed by the second screw 14, the compression spring 2 is sleeved on the guide column 3, the slider 5 penetrates the guide column 3, the guide column 3 is connected to the rear fixed block 6 by the second screw 14, and the wire rope 7 is connected On the hook 4, a first screw 12 and a nut 13 are installed on the front fixing block 1 as a hard limit. A total of 12 holes above the front fixing block 1 and the rear fixing block 6 are all mounting connection holes for fixing the anti-rebound device to the use area; when the object load 15 of the anti-rebound device moves backward and is buffered and rebounded by the buffer device 17, the limit hook 16 at its tail contacts the hook 4 of the anti-rebound device, and the hook 4 is tightened by the tension spring 8 connected to the limit block 9 to maintain an upright state, so that the hook 4 drives the slider 5 to move axially along the guide column 3, and the compression spring 2 is compressed. After the object load 15 has completed unloading, the compression spring 2 resets, pushing the slider 5 back, and the hook 4 follows back, and the limit hook 16 of the object load 15 that is in contact with the hook 4 also follows back, and the rebound process ends.

[0027] After stopping, the target load 15 is still restricted to the rear of the anti-rebound device. To reset the target load 15, pull the wire rope 7 backwards, and the hook 4 rotates around the latch 10, with its top end dropping downwards. The tension spring 8 is in a stretched state. When the lowest point of the limit hook 16 at the tail of the target load 15 is higher than the top of the hook 4, push the target load 15 forward away from the anti-rebound device. At this time, release the wire rope 7, and the hook 4 rotates back under the tension of the tension spring 8. The limit block 9 connected to it stops rotating after contacting the bottom of the slider 5, and the entire anti-rebound device is reset. The schematic diagram of the unlocked state of the target load 15 of the anti-rebound device is shown in FIG. Figure 4 shown.

[0028] The key components of the entire anti-rebound device are the compression spring 2, guide post 3, hook 4, and slider 5. The compression spring 2 is made of high-strength die steel and can be replaced according to the load to ensure buffering within the effective stroke. To ensure that the buffering direction is in a straight line, the guide posts 3 are installed in parallel on the left and right sides. The diameter of the guide posts 3 is determined according to the specifications of the inserted compression spring 2, and the length of the guide posts 3 is determined according to the size of the slider 5 and the buffering stroke. The parallelism of the two guide posts is required to be high, and the diameter and surface roughness are also required to be high. The hook 4 is a cylindrical structure with a triangular ring structure on the side and a platform on the top. The height of the hook 4 is determined by the distance between the installation position and the limit hook 16. It can automatically hook the limit hook 16 and unhook the limit hook 16 through the wire rope 7. To improve durability, the hook 4 is tempered as a whole, and the contact point of the limit hook 16 is high-frequency quenched.

[0029] Figure 5 The diagram shows the structure of the slider 5. The slider 5 is square in shape, with a central boss containing a square recess within which a hook 4 is positioned. The central boss protrudes from the front wall of the slider 5, and through-holes are provided on either side of the protrusion. A latch 10 passes through these holes and connects to the hook 4. The circular holes on the left and right sides serve as mounting points for the guide posts 3. The two holes in the upper portion (in actual use, the lower portion) are attachment holes for the tension spring 8.

[0030] Figure 6 The figure shows a schematic diagram of the latch 10. The latch 10 is a stepped pin as a whole. The small end is inserted from one side of the slider 5, passes through the hook 4 installed in the slider 5, and then passes out from the other side of the slider 5. The small end is clamped by an elastic circlip 11 on the shaft so that the latch 10 can only rotate axially. The material is mold steel and surface hardened to improve wear resistance and impact resistance.

[0031] The contents not described in detail in the specification of this utility model belong to the common knowledge of professionals in this field.

Claims

1. A brake anti-rebound device, characterized in that: The invention comprises a front fixing block (1), a compression spring (2), a guide column (3), a hook (4), a slider (5), a rear fixing block (6), a drawstring (7), a tension spring (8), a limit block (9) and a latch (10). One end of the guide column (3) is connected to the front fixing block (1), and the other end is connected to the rear fixing block (6). The guide column (3) passes through a through hole on the slider (5) and is connected to the slider (5). The compression spring (2) is sleeved on the guide column (3). One end of the compression spring (2) is connected to the front fixing block (1), and the other end is connected to the slider (5). The hook (4) is connected to the slider (5) through the latch (10). The limit block (9) is fixedly connected to the lower part of the hook (4). One end of two tension springs (8) are respectively hooked on the left and right sides of the limit block (9), and the other end is hooked on the bottom of the slider (5). The drawstring (7) is connected to the hook (4).

2. The anti-rebound braking device according to claim 1, characterized in that: The utility model also includes a shaft elastic circlip (11), wherein the latch pin (10) is a stepped pin, and the small end of the latch pin (10) is inserted from one side of the slider (5), passes through the hook (4) and then passes out from the other side of the slider (5), and the shaft elastic circlip (11) limits the small end of the latch pin (10).

3. The anti-rebound braking device according to claim 1, characterized in that: It also includes a second screw (14), and the guide column (3) is connected to the front fixing block (1) and the rear fixing block (6) through the second screw (14).

4. The anti-rebound braking device according to claim 1, characterized in that: It also includes a first screw (12) and a nut (13), which are fixed on the front fixing block (1) and are used to limit the extreme position of the slider (5) during the braking process.

5. The anti-rebound braking device according to claim 1, characterized in that: The front fixing block (1) and the rear fixing block (6) include at least one through hole, which serves as a mounting connection hole for fixing to a use area.

6. The anti-rebound braking device according to claim 1, characterized in that: The guide column (3) comprises two parallel columns, which are respectively connected to the front fixing block (1), the sliding block (5) and the rear fixing block (6); and two compression springs (2) are respectively sleeved on the two guide columns (3).

7. The anti-rebound braking device according to claim 1, characterized in that: The hook (4) is a columnar structure, the side surface is a triangular ring structure, the top of the front side surface includes a platform, and the pull rope (7) is connected to the front side surface of the hook (4).

8. The anti-rebound braking device according to claim 1, characterized in that: The slider (5) is a square structure, with a boss provided in the middle, the boss including a square groove, and the hook (4) is arranged in the square groove.

9. The anti-rebound braking device according to claim 8, characterized in that: The middle boss of the slider (5) protrudes from the front wall of the slider (5), and through holes are provided on both sides of the protruding part. The latch (10) passes through the through holes and is connected to the hook (4).

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