An adjustable fall arrest arm

Abstract

The application discloses an adjustable anti-falling brake arm, which comprises a brake lever, a friction head and a connecting hole; the brake lever is provided with a first hinge hole in the middle, a second hinge hole at one end and the connecting hole at the other end; the friction head is provided with a friction surface at one end and an open slot at the other end, and the two opposite side walls of the open slot are provided with a strip-shaped hole; wherein the end of the brake lever away from the second hinge hole is embedded into the open slot, and the connecting hole is aligned with the strip-shaped hole and is provided with a fastener; the alignment of the connecting hole with the strip-shaped hole at different positions can adjust the relative position of the friction head and the brake lever. The brake arm is designed as two independent components, the overall length of the brake arm is adjusted and fixed by aligning the connecting hole with the strip-shaped hole at different positions and installing the fastener, which is simple and fast, reduces the time and labor intensity of installation and adjustment, and has the adjusting function, so that the adjustment can be realized without replacing the whole component, thereby reducing the maintenance cost and replacement frequency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of converter oxygen supply, in particular, to an adjustable anti-falling brake arm. BACKGROUND

[0002] Oxygen lance anti-falling is a reliable anti-falling device of the oxygen lance lifting trolley in the converter oxygen supply system, and the brake arm in the anti-falling device is a key spare part for anti-falling. The early designed brake arm is a whole type without any telescopic adjustment function, and is designed after the oxygen lance lifting trolley and the oxygen lance fixed track are installed and positioned well after the converter is put into production. Through a period of use, the fixed track and the oxygen lance trolley will be deformed, which will change the gap value between the brake arm and the fixed track. The gap value is particularly important for the realization of the oxygen lance anti-falling function. If the gap value is too small, the brake arm cannot be turned up, and the brake arm cannot contact the fixed guide rail. If the gap value is too large, the brake arm is turned over, and the brake arm cannot contact the fixed guide rail. Due to the change of the gap value, the early brake arm cannot meet the requirements, that is, the normal function of the anti-falling device cannot be guaranteed, and there is a great safety risk, so a telescopic adjustable brake arm is needed to adjust the length to meet the assembly requirements and finally ensure the oxygen lance anti-falling function. SUMMARY

[0003] The present application aims at solving at least one of the technical problems existing in the prior art. To this end, the present application provides an adjustable anti-falling brake arm.

[0004] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0005] An adjustable anti-falling brake arm comprises a brake lever, a first hinge hole is arranged in the middle of the brake lever, a second hinge hole is arranged at one end of the brake lever, and a connecting hole is arranged at the other end of the brake lever; a friction head comprises a friction surface arranged at one end of the friction head and an open slot arranged at the other end of the friction head, and two opposite side walls of the open slot are provided with a strip-shaped hole; wherein the end of the brake lever away from the second hinge hole is embedded in the open slot, and the connecting hole is aligned with the strip-shaped hole and is provided with a fastener; the alignment of different positions of the connecting hole and the strip-shaped hole can adjust the relative position of the friction head and the brake lever, that is, the length of the whole brake arm.

[0006] Further, the fastener is a bolt and a nut matched with the bolt, and the bolt passes through the strip-shaped hole and the connecting hole and is connected with the nut at one end.

[0007] Further, the connecting hole is provided with at least two groups, the number of the strip-shaped holes corresponds to the number of the groups of the connecting holes, and the connecting holes in the same group are arranged along the length direction of the brake lever.

[0008] Further, the brake lever has an abutting end face at the end away from the second hinge hole, the open slot has an abutting side wall opposite to the abutting end face, the abutting end face and the abutting side wall are at an angle and the distance between them narrows downward; an adjusting block is arranged between the abutting end face and the abutting side wall, the adjusting block has a first abutting face abutting the abutting end face and a second abutting face abutting the abutting side wall, a connecting plate is arranged at the top of the open slot, the connecting plate is provided with a threaded hole, an adjusting screw is connected to the threaded hole, and the adjusting screw abuts the upper end of the adjusting block.

[0009] Further, the side wall of the brake lever at the top abuts the bottom face of the connecting plate, and the length direction of the strip-shaped hole is parallel to the bottom face of the connecting plate.

[0010] Further, the side wall of the brake lever at the top is provided with a clamping groove arranged along the length direction of the strip-shaped hole, and a movable rod is elastically movably arranged on the connecting plate, the movable rod has a clamping block capable of being embedded in the clamping groove.

[0011] Further, the movable rod is hinged to the connecting plate through a hinge shaft, a torsion spring is sleeved on the hinge shaft, the torsion spring is used to apply an elastic force to the movable rod, and the elastic force is used to push the clamping block on the movable rod to be embedded in the clamping groove.

[0012] Further, the upper end of the connecting plate is provided with a mounting groove for embedding part of the movable rod, and the bottom wall of the mounting groove is provided with a through hole for the clamping block to pass through.

[0013] Further, the end of the movable rod away from the clamping block is provided with an upwardly curved pressing portion.

[0014] Further, the friction surface is arc-shaped, and the friction surface is provided with an anti-skid structure.

[0015] The present application has the following advantages:

[0016] The brake arm is designed as two independent parts, the brake lever and the friction head are aligned with different positions of the connecting hole and the strip-shaped hole and the overall length of the brake arm is adjusted and fixed by installing fasteners, which is simple and fast, and reduces the installation and adjustment time and labor intensity. The brake arm can be adjusted in length according to the gap value between the brake arm and the fixed track, so as to adapt to different installation requirements and improve the adaptability and flexibility of the brake arm. Since the length of the brake arm can be adjusted, it can be ensured that after the fixed track and the oxygen lance cart are deformed, the brake arm can be adjusted in length according to the actual situation to adapt to the deformation, thereby avoiding the problem that the brake arm cannot work normally due to too small or too large gap value, thereby significantly improving the safety of the oxygen lance falling prevention device, and without having to replace the entire brake arm of different length as in the prior art once the fixed track and the oxygen lance cart are deformed, thereby reducing the maintenance cost, replacement frequency and maintenance time. The brake arm in the application has the adjusting function and can be adjusted without replacing the entire part, thereby reducing the maintenance cost and replacement frequency and maintenance time.

[0017] In addition to the objects, features, and advantages described above, the present application has other objects, features, and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application, illustrate the preferred embodiments of the application, and assist in the explanation of the application. In the drawings:

[0019] Figure 1 is a schematic view of the overall structure of the first embodiment of the present application;

[0020] Figure 2 is an exploded state structure schematic view of Figure 1

[0021] Figure 3 is a structure schematic view of the friction head;

[0022] Figure 4 is a sectional view of the second embodiment of the present application;

[0023] Figure 5 is an enlarged view of A of Figure 4

[0024] Figure 6 is an enlarged view of B of Figure 4

[0025] Figure 7 is a schematic view of the overall structure of the second embodiment of the present application;

[0026] Figure 8 is a structure schematic view of Figure 7 ​​​Decomposition state structural schematic diagram of the device.

[0027] Legend:

[0028] Brake lever 100, first hinged hole 110, second hinged hole 120, connecting hole 130, abutting end face 140, clamping groove 150;

[0029] Friction head 200, friction surface 210, open slot 220, abutting side wall 221, strip-shaped hole 230, connecting plate 240, threaded hole 241, mounting groove 242, through hole 243, adjusting screw 250, movable rod 260, clamping block 261, hinged shaft 262, torsional spring 263, pressing part 264;

[0030] Bolt 300, nut 310;

[0031] Adjusting block 400, first abutting surface 410, second abutting surface 420. DETAILED DESCRIPTION

[0032] It should be understood that the specific embodiments described herein are merely exemplary and do not limit the present application.

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0035] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the scope of protection claimed by the present application.

[0036] Please refer to Figure 1 and Figure 2In one preferred embodiment of the present application, the adjustable anti-falling brake arm comprises a brake rod 100 and a friction head 200.

[0037] The brake rod 100 is provided with a first hinge hole 110 in the middle, which is hinged to the rack, and a second hinge hole 120 at one end, which is used to connect a driving mechanism to drive it around the first hinge hole 110 to realize automatic control. The other end of the brake rod 100 is provided with a connecting hole 130, which penetrates along the thickness direction of the brake rod 100. The friction head 200 is provided with a friction surface 210 at one end and an open slot 220 at the other end, and the two opposite side walls of the open slot 220 are provided with a strip-shaped hole 230.

[0038] The end of the brake rod 100 away from the second hinge hole 120 is embedded in the open slot 220, and the connecting hole 130 is aligned with the strip-shaped hole 230 and installed with a fastener. Aligning the connecting hole 130 with the strip-shaped hole 230 at different positions can adjust the relative position of the friction head 200 and the brake rod 100, thereby adjusting the distance between the friction surface 210 and the first hinge hole 110 and the second hinge hole 120, i.e. adjusting the effective length of the anti-falling brake arm.

[0039] In one preferred embodiment of the present application, the adjustable anti-falling brake arm is designed as two independent components, the brake rod 100 and the friction head 200, and the overall length of the brake arm is adjusted and fixed by aligning the connecting hole 130 with the strip-shaped hole 230 at different positions and installing a fastener, which is simple and fast to operate, reducing the time and labor intensity of installation and adjustment. The brake arm can be adjusted in length according to the gap value between the brake arm and the fixed track, thereby adapting to different installation requirements and improving the adaptability and flexibility of the brake arm. Since the brake arm can adjust the length, it can ensure that after the fixed track and the oxygen lance trolley are deformed, the brake arm can adjust the length according to the actual situation to adapt to the deformation, avoiding the problem that the brake arm cannot work normally due to too small or too large gap value, thereby significantly improving the safety of the oxygen lance anti-falling device, without the need to replace the entire brake arm as in the prior art after the fixed track and the oxygen lance trolley are deformed, thereby reducing the maintenance cost and replacement frequency.

[0040] Referring to Figure 1 and Figure 2 In some embodiments of the present application, the fastener is a bolt 300 and a nut 310 matched with the bolt, one end of the bolt 300 penetrates through the strip-shaped hole 230 and the connecting hole 130 and is connected with the nut 310, thereby connecting and fixing the brake rod 100 and the friction head 200.

[0041] Referring to Figure 2and Figure 3 In some embodiments of the present application, the connecting holes 130 are provided in at least two groups, the number of the strip-shaped holes 230 corresponds to the number of the groups of the connecting holes 130, and the connecting holes 130 in the same group are arranged along the length direction of the brake lever 100, so that the fasteners on the connecting holes 130 can move along the length direction of the strip-shaped holes 230 (the length direction of the brake lever 100) to adjust the mounting position, thereby realizing the length adjustment of the anti-falling brake arm. The multiple groups of the connecting holes 130 are provided to realize multi-position connection, thereby improving the stability and reliability of the connection and fixation.

[0042] Referring to Figure 4 In some embodiments of the present application, the end of the brake lever 100 away from the second hinge hole 120 is provided with an abutting end face 140, the open slot 220 is provided with an abutting side wall 221 opposite to the abutting end face 140, the abutting end face 140 and the abutting side wall 221 are at a certain angle and the distance between them narrows downward, an adjusting block 400 is arranged between the abutting end face 140 and the abutting side wall 221, the adjusting block 400 is provided with a first abutting face 410 abutting the abutting end face 140 and a second abutting face 420 abutting the abutting side wall 221, the top of the open slot 220 is provided with a connecting plate 240, the connecting plate 240 is provided with a threaded hole 241, and an adjusting screw 250 is connected to the threaded hole 241 and abuts the upper end of the adjusting block 400. Since the friction face 210 will be in contact with the external structure to realize friction braking, the maximum force received by the friction head 200 during operation is generated at the friction face 210, and the force has a tendency to push the friction head 200 to move closer to the brake lever 100. Under the long-term action, the distance between the friction head 200 and the brake lever 100 (i.e. the distance between the abutting end face 140 and the abutting side wall 221) may become smaller, so the adjusting block 400 is arranged to fix the distance between the friction head 200 and the brake lever 100, so that the distance between the friction head 200 and the brake lever 100 cannot at least become smaller. By the abutting end face 140 and the abutting side wall 221 being at a certain angle and the distance between them narrowing downward, and the first abutting face 410 and the second abutting face 420 abutting the abutting end face 140 and the abutting side wall 221 respectively, the adjusting block 400 is stably clamped by the friction head 200 and the brake lever 100, and the up-down movement of the adjusting block 400 can also adapt to the distance between the abutting end face 140 and the abutting side wall 221, i.e. adapt to the length adjustment of the brake arm. Of course, if the distance changes greatly, different width specifications of the adjusting block 400 can also be used. The adjusting screw 250 abutting the upper end of the adjusting block 400 is used to fix the adjusting block 400, so as to avoid the upward movement of the adjusting block 400 and the distance between the friction head 200 and the brake lever 100 cannot be fixed, which may cause relative displacement during use.

[0043] Referring to Figure 4In some embodiments of the present application, the side wall of the top of the brake lever 100 is attached to the bottom surface of the connecting plate 240, and the length direction of the strip-shaped hole 230 is parallel to the bottom surface of the connecting plate 240, thereby avoiding the interference of the connecting plate 240 to the brake lever 100, and the bottom surface of the connecting plate 240 can also be used as a structure for attaching and positioning the top of the brake lever 100, so that the strip-shaped hole 230 and the connecting hole 130 are more easily aligned during installation, thereby facilitating the installation.

[0044] Referring to Figure 5 In some embodiments of the present application, the side wall of the top of the brake lever 100 is provided with a clamping groove 150 arranged along the length direction of the strip-shaped hole 230, and the movable lever 260 is elastically movably installed on the connecting plate 240, and the movable lever 260 has a clamping block 261 capable of being embedded in the clamping groove 150. During installation, if the position is adjusted to the appropriate position, the position may float during the installation of the fastener, resulting in installation deviation after installation, which may need to be adjusted repeatedly, and the operation is more troublesome. However, by embedding the clamping block 261 in the clamping groove 150, the temporary fixation of the brake lever 100 and the friction head 200 after being adjusted to the appropriate position can be realized, so that the brake lever 100 and the friction head 200 will not be relatively displaced during the subsequent installation of the fastener, thereby ensuring the position stability and improving the adjustment accuracy and efficiency.

[0045] Referring to Figure 6 In some embodiments of the present application, the movable lever 260 is hinged to the connecting plate 240 through a hinge shaft 262, and a torsional spring 263 is sleeved on the hinge shaft 262, and the torsional spring 263 is used to apply an elastic force to the movable lever 260, and the elastic force is used to push the clamping block 261 on the movable lever 260 to be embedded in the clamping groove 150. The torsional spring 263 has two extended action arms, one of which is in contact with the movable lever 260, and the other of which is in contact with the connecting plate 240, thereby applying an elastic force to the movable lever 260. The elastic force makes the clamping block 261 stably embedded in the clamping groove 150 and can maintain the embedded state, so that the strip-shaped hole 230 and the connecting hole 130 are aligned and the position is stable when the fastener is installed. When adjustment is needed, the clamping block 261 can be lifted and separated from the clamping groove 150 by operating the movable lever 260, which is simple and convenient.

[0046] Referring to Figure 7 and Figure 8 In some embodiments of the present application, the upper end of the connecting plate 240 is provided with a mounting groove 242 for embedding part of the movable lever 260, and the bottom wall of the mounting groove 242 is provided with a through hole 243 for the clamping block 261 to pass through, and the side wall of the mounting groove 242 is provided with corresponding hole positions for the movable lever 260 to realize hinging through the hinge shaft. The through hole 243 can be used for the clamping block 261 to pass through and be embedded in the clamping groove 150, thereby avoiding structural interference.

[0047] Referring to Figure 7and Figure 8 In some embodiments of the present application, the active lever 260 is provided with an upturned pressing portion 264 at one end away from the clamping block 261, so that when it is needed to operate the active lever 260 to make the clamping block 261 disengage from the clamping groove 150, the pressing portion 264 can be pressed downward, which is simple and convenient to operate.

[0048] In some embodiments of the present application, the friction surface 210 is profiled as an arc surface, and the friction surface 210 is provided with an anti-skid structure, which can be anti-skid lines, anti-skid grooves or other structures with the ability to increase friction.

[0049] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An adjustable fall arrest arm characterized by, The utility model relates to a brake lever and friction head assembly, comprising: a brake lever (100) having a first hinge hole (110) in the middle, a second hinge hole (120) at one end, and a connecting hole (130) at the other end; a friction head (200) having a friction surface (210) at one end and an open slot (220) at the other end, the two opposite side walls of the open slot (220) being provided with a strip-shaped hole (230); wherein the end of the brake lever (100) away from the second hinge hole (120) is embedded in the open slot (220), and the connecting hole (130) is aligned with the strip-shaped hole (230) and is provided with a fastener; the relative position of the friction head (200) and the brake lever (100) can be adjusted by aligning the connecting hole (130) with different positions of the strip-shaped hole (230); the end of the brake lever (100) away from the second hinge hole (120) has an abutting end face (140), the open slot (220) has an abutting side wall (221) opposite the abutting end face (140), the abutting end face (140) and the abutting side wall (221) form a certain angle and the distance between them narrows downward; an adjusting block (400) is arranged between the abutting end face (140) and the abutting side wall (221), the adjusting block (400) has a first abutting surface (410) abutting the abutting end face (140) and a second abutting surface (420) abutting the abutting side wall (221), the top of the open slot (220) is provided with a connecting plate (240), the connecting plate (240) is provided with a threaded hole (241), the threaded hole (241) is connected with an adjusting screw (250), and the adjusting screw (250) abuts the upper end of the adjusting block (400).

2. An adjustable fall arrest arm according to claim 1, wherein, The fastener is a bolt (300) and a nut (310) matched with the bolt, one end of the bolt (300) passes through the strip-shaped hole (230) and the connecting hole (130) and is connected with the nut (310).

3. An adjustable fall arrest arm according to claim 1, wherein, The connecting hole (130) is provided with at least two groups, the number of strip-shaped holes (230) corresponds to the number of groups of connecting holes (130), and the connecting holes (130) in the same group are arranged along the length direction of the brake lever (100).

4. An adjustable fall arrest arm according to claim 1, wherein, The side wall of the top of the brake lever (100) abuts the bottom surface of the connecting plate (240), and the length direction of the strip-shaped hole (230) is parallel to the bottom surface of the connecting plate (240).

5. An adjustable fall arrest arm according to claim 4, wherein, The side wall of the top of the brake lever (100) is provided with a clamping groove (150) arranged along the length direction of the strip-shaped hole (230), the connecting plate (240) is elastically movably mounted with a movable rod (260), and the movable rod (260) has a clamping block (261) capable of being embedded in the clamping groove (150).

6. An adjustable fall arrest arm according to claim 5, wherein, The movable rod (260) is hinged to the connecting plate (240) through a hinge shaft (262), a torsional spring (263) is sleeved on the hinge shaft (262), the torsional spring (263) is used for exerting an elastic force on the movable rod (260), and the elastic force is used for pushing the clamping block (261) on the movable rod (260) to be embedded in the clamping groove (150).

7. An adjustable fall arrest arm according to claim 6, wherein, The connecting plate (240) is provided with an installation groove (242) at the upper end for partially embedding the movable rod (260), and the bottom wall of the installation groove (242) is provided with a through hole (243) for the clamping block (261) to pass through.

8. An adjustable fall arrest arm according to claim 6, wherein, The movable rod (260) is provided with an upwardly curved pressing portion (264) at the end away from the clamping block (261).

9. An adjustable fall arrest arm as claimed in claim 1, wherein, The friction surface (210) is arc-shaped, and the friction surface (210) is provided with an anti-skid structure.

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