Open type clamp capable of adjusting and limiting brake clearance

Abstract

The utility model relates to the field of mechanical engineering, in particular to an open-type clamp capable of adjusting and limiting a brake clearance. The pair of open-type pliers capable of adjusting and limiting the brake clearance comprises two lever arms, two brake block assemblies, a telescopic device, a supporting assembly and a clearance adjuster, the two lever arms are oppositely distributed in a spaced mode, the supporting assembly is arranged between the two lever arms and hinged to the middles of the two lever arms respectively, and the clearance adjuster is arranged between the two brake block assemblies. The telescopic device is connected between one ends of the two lever arms, the two brake block assemblies are installed at the other ends of the two lever arms respectively and are close to each other oppositely, and the gap adjuster is installed between one ends of the two lever arms. The brake clearance adjusting device has the advantages that the structure design is reasonable, the clearance adjuster is an independent individual, the functions of the oil cylinder are not affected when the clearance adjuster is damaged and broken down, replacement is convenient, the brake clearance adjusting device is matched with brake calipers of various models, rapid replacement can be achieved on site, positioning precision is high, brake clearance can be accurately controlled, and manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of mechanical engineering, and in particular to an open caliper with adjustable and limited brake gap. Background Technology

[0002] The hydraulic disc brake devices currently used in oil drilling rigs employ hydraulic, tension spring adjustment, and limit mechanisms connected to some cylinders to adjust the brake clearance of the open-type tongs.

[0003] Among them, the hydraulically adjustable limit mechanism has a relatively complex structural design, the adjusting cylinder often leaks oil, the on-site operation is complicated, and the maintenance cost is high. Failure of the limit mechanism itself can easily lead to the scrapping of the entire cylinder. The tension spring adjustable limit mechanism is difficult to control the adjustment gap precisely, has poor adjustment accuracy, and cannot effectively control the brake gap. The limit mechanism connected to the cylinder needs to be connected and interlocked with the cylinder pin. Disassembly and assembly require the removal of the cylinder pin and other parts, making installation and maintenance inconvenient.

[0004] Therefore, it is necessary to develop an open caliper with adjustable and limited brake clearance to overcome the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an open caliper with adjustable and limited brake gap, which effectively overcomes the defects of the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] An adjustable open caliper with a defined brake clearance includes two lever arms, two sets of brake block assemblies, a telescopic device, a support assembly, and a clearance adjuster. The two lever arms are distributed relatively at intervals. The support assembly is disposed between the two lever arms and is hinged to the middle portion of each of the two lever arms. The telescopic device is connected between one end of each of the two lever arms. The two sets of brake block assemblies are respectively mounted on the other end of each of the two lever arms and are relatively close to each other. The clearance adjuster is mounted between one end of each of the two lever arms.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the aforementioned brake block assembly includes a brake backplate and a brake block. One side of the brake backplate is provided with an ear seat, and the other end of the lever arm extends into the corresponding ear seat of the brake backplate and is pinned to the ear seat by a backplate pin that passes through both. The brake block is mounted on the other side of the brake backplate, and the brake blocks of the two aforementioned brake block assemblies are relatively close to each other.

[0010] Furthermore, the telescopic device includes a telescopic cylinder, and the cylinder end and telescopic end of the telescopic cylinder are respectively provided with connecting parts. The middle part of one end of the two lever arms is respectively provided with a fitting notch. The two connecting parts extend into the fitting notches of the two lever arms respectively. The connecting parts are provided with a cylinder pin that penetrates vertically through them and one end of the lever arm.

[0011] Furthermore, it also includes a spring-loaded component, which is connected between one end of the two lever arms.

[0012] Furthermore, the aforementioned rebound component includes two sets of tension springs, and locking pins are respectively provided through both ends of the aforementioned cylinder pins. A set of the aforementioned tension springs is connected between the locking pins of the two aforementioned cylinder pins located at the same end.

[0013] Furthermore, the aforementioned support assembly includes two support rods, which are distributed in parallel at intervals. The middle portion of each of the two lever arms is provided with an assembly hole corresponding to one of the two support rods. The two ends of each of the two support rods are respectively embedded in the corresponding assembly holes. The two ends of each of the two support rods are respectively provided with lever pins that penetrate vertically through both of them and pass through the lever arms.

[0014] Furthermore, the aforementioned gap adjuster includes an outer cylinder, an adjusting screw, a telescopic rod, and an elastic element. One end of the outer cylinder has an internal thread on its inner wall. One end of the adjusting screw extends into one end of the outer cylinder and is screwed into it. The other end of the adjusting screw is detachably connected to one end of one of the lever arms. One end of the telescopic rod extends into the other end of the outer cylinder and is relatively slidably engaged. The other end of the telescopic rod is detachably connected to one end of the other lever arm. The elastic element is installed between the other end of the telescopic rod and the other end of the outer cylinder. A locking nut for abutting or separating from one end of the outer cylinder is screwed onto one end of the adjusting screw.

[0015] Furthermore, one side of each of the two lever arms that are relatively close to each other is provided with a blind hole that corresponds to the adjusting screw and the telescopic rod. The other end of the adjusting screw is provided with a first plug portion, and the other end of the telescopic rod is provided with a second plug portion. The first plug portion and the second plug portion are respectively inserted into the corresponding blind holes.

[0016] Furthermore, the other end of the telescopic top rod is provided with a first limiting part with a cross-sectional area larger than that of the outer cylinder, and the outer surface of the other end of the outer cylinder is provided with an annular second limiting part, and the elastic element is connected between the first limiting part and the second limiting part.

[0017] Furthermore, the aforementioned gap adjuster is provided in two sets, and is distributed between the two sides of one end of the two aforementioned lever arms.

[0018] The advantages of this utility model are: reasonable structural design, the gap adjuster is an independent unit, its damage and failure will not affect the function of the hydraulic cylinder, it is easy to replace, it is compatible with various models of brake calipers, it can be quickly replaced on site, it has high positioning accuracy, it can accurately control the brake gap, and it has low manufacturing cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the adjustable limiting brake gap open caliper of this utility model;

[0020] Figure 2 This is a schematic diagram of the adjustable brake gap adjuster for the open caliper of the present invention.

[0021] Figure 3 This is a cross-sectional view of the adjustable brake gap adjuster in the open caliper according to the present invention.

[0022] The attached diagram lists the components represented by each number as follows:

[0023] 1. Lever arm; 2. Brake block assembly; 3. Telescopic device; 4. Support assembly; 5. Clearance adjuster; 21. Brake backplate; 22. Brake block; 23. Backplate pin; 31. Telescopic cylinder; 32. Connecting part; 33. Cylinder pin; 34. Rebound component; 41. Support rod; 42. Lever pin; 51. Outer cylinder; 52. Adjusting screw; 53. Telescopic top rod; 54. Elastic element; 55. Locking nut; 211. Ear seat; 331. Locking pin; 511. Second limiting part; 531. First limiting part. Detailed Implementation

[0024] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0025] Example

[0026] like Figure 1 As shown, the adjustable brake gap open caliper of this embodiment includes two lever arms 1, two sets of brake block assemblies 2, a telescopic device 3, a support assembly 4, and a gap adjuster 5. The two lever arms 1 are distributed relatively at intervals. The support assembly 4 is disposed between the two lever arms 1 and is hinged to the middle part of the two lever arms 1 respectively. The telescopic device 3 is connected between one end of the two lever arms 1. The two sets of brake block assemblies 2 are respectively installed at the other end of the two lever arms 1 and are relatively close to each other. The gap adjuster 5 is installed between one end of the two lever arms 1.

[0027] The adjustable open caliper with adjustable brake clearance in this embodiment has two operating modes: braking mode and brake release mode, as detailed below:

[0028] When braking, the telescopic device 3 extends. Since the two lever arms 1 are connected in the middle by the support component 4, the distance between one end of the two lever arms 1 increases and the distance between the other end (that is, the end with the brake block assembly 2) narrows. The two sets of brake block assemblies 2 move closer to each other until they clamp the brake disc (rotating component) to perform braking operation.

[0029] When the brake is released, the telescopic device 3 retracts and resets, the distance between one end of the two lever arms 1 narrows, and the distance between the other ends increases. The two sets of brake block assemblies 2 move away from each other, the gap widens, they disengage from the brake disc, and the brake is released.

[0030] The purpose of the gap adjuster 5 is to lock the telescopic device 3 in place when it retracts to the appropriate position, preventing it from fully returning to its initial state. In the appropriate position, the gap adjuster 5 connects between the two lever arms 1, ensuring that the two sets of brake block assemblies 2 at the other end are only a predetermined distance away from the brake disc (rotating component), such as 1mm or another predetermined distance. During the next braking operation, the telescopic device 3 only needs to extend slightly to complete the braking action, reducing the distance and time of the extension action and achieving immediate braking response. Furthermore, when wear occurs in the brake block assembly 2 or the brake disc, causing an increase in brake clearance, the length of the gap adjuster 5 can be adjusted and locked appropriately.

[0031] Overall, this device, employing a separately assembled gap adjuster, is a standalone unit, not directly connected to the telescopic mechanism, and does not alter the original structure of the telescopic mechanism or brake caliper, thus ensuring brake performance. Installation and removal of this device do not require alteration of any screws, nuts, or other structural components on the telescopic mechanism or brake system, guaranteeing their performance, sealing, and reliable installation. The device is convenient, simple, time-saving, and labor-saving to install and adjust; it is also portable and allows for quick maintenance. Furthermore, the gap adjustment effect and status can be visually observed, allowing for immediate adjustment and testing, and precise control of the brake gap.

[0032] In this embodiment, the brake block assembly 2 includes a brake backplate 21 and a brake block 22. One side of the brake backplate 21 is provided with an ear seat 211. The other end of the lever arm 1 extends into the corresponding ear seat 211 of the brake backplate 21 and is pinned to the ear seat 211 by a backplate pin 23 passing through both. The brake block 22 is mounted on the other side of the brake backplate 21, and the brake blocks 22 of the two brake block assemblies 2 are relatively close to each other. The design of the ear seat 211 facilitates good assembly between the other end of the lever arm 1 and the brake backplate 21. The assembly and disassembly process is also relatively convenient and quick.

[0033] In this embodiment, the brake block 22 can be securely assembled with the brake backplate 21 by bolts that pass through it.

[0034] In a preferred embodiment, the telescopic device 3 includes a telescopic cylinder 31. The cylinder end and the telescopic end of the telescopic cylinder 31 are respectively provided with connecting parts 32. The middle part of one end of the two lever arms 1 is respectively provided with a fitting notch. The two connecting parts 32 extend into the fitting notches of the two lever arms 1 respectively. The connecting part 32 is provided with a cylinder pin 33 that passes vertically through it and one end of the lever arm 1.

[0035] In the above implementation scheme, the telescopic device 3 adopts a conventional telescopic cylinder 31. The cylinder body of the telescopic cylinder 31 is provided with an oil inlet and an oil return port. When it is extended, oil enters through the oil inlet, the piston rod extends, and braking is achieved. When the brake is released, oil returns through the oil return port, the piston rod retracts, and the other end of the lever arm 1 is opened.

[0036] As a preferred embodiment, it also includes a spring-loaded component 34, which is connected between one end of the two lever arms 1.

[0037] In the above implementation scheme, when braking, the telescopic cylinder 31 is filled with oil, the piston rod extends, and the spring-loaded component 34 deforms. When the brake is released, the oil filling stops, and the spring-loaded component 34 returns to its original shape, causing one end of the lever arm 1 to close. The oil in the telescopic cylinder 31 is discharged through the oil return port, ensuring that one end of the lever arm 1 can quickly approach and close during the brake release process, with a rapid response.

[0038] In this embodiment, the rebound component 34 includes two sets of tension springs. Locking pins 331 are respectively provided at both ends of the hydraulic cylinder pins 33, and a set of tension springs is connected between the locking pins 331 of the two hydraulic cylinder pins 33 located at the same end. During braking, the two sets of tension springs are stretched. When the brake is released, the two sets of tension springs pull one end of the lever arm 1 to swing relative to each other around the central support component 4. The distribution of the two sets of tension springs makes the rebound force relatively balanced.

[0039] In this embodiment, the support assembly 4 includes two support rods 41, which are distributed in parallel at intervals. The middle portions of the two lever arms 1 are respectively provided with mounting holes corresponding to the two support rods 41. The two ends of the two support rods 41 are respectively inserted into the corresponding mounting holes. The two ends of the two support rods 41 are respectively provided with lever pins 42 that perpendicularly penetrate both of them and pass through the lever arms 1. The cross-sectional dimension of the mounting hole is larger than the cross-sectional area of ​​the insertion portion of the support rod 41, so that the end of the support rod 41 has a certain amount of movement when the lever arm 1 swings around it.

[0040] As a preferred implementation method, such as Figure 2 and3 As shown, the gap adjuster 5 includes an outer cylinder 51, an adjusting screw 52, ​​a telescopic rod 53, and an elastic element 54. One end of the outer cylinder 51 has an internal thread on its inner wall. One end of the adjusting screw 52 extends into one end of the outer cylinder 51 and is screwed into it. The other end of the adjusting screw 52 is detachably connected to one end of one of the lever arms 1. One end of the telescopic rod 53 extends into the other end of the outer cylinder 51 and is slidably engaged with it. The other end of the telescopic rod 53 is detachably connected to one end of the other lever arm 1. The elastic element 54 is installed between the other end of the telescopic rod 53 and the other end of the outer cylinder 51. A locking nut 55 is screwed onto one end of the adjusting screw 52 for abutting or separating from one end of the outer cylinder 51.

[0041] In the above implementation scheme, during braking, the distance between one end of the two lever arms 1 increases, and the telescopic push rod 53 is pushed out by the elastic element 54 to adapt to the widened distance and prevent the gap adjuster 5 from dislodging or falling off; after braking ends, the distance between one end of the two lever arms 1 decreases, and the telescopic push rod 53 compresses the elastic element 54 until the telescopic push rod 53 is in its maximum extended position and the retraction action ends; the elastic element 54 stores energy in preparation for the next braking action. During maintenance, when the brake block assembly 2 or brake disc wears and causes the brake clearance to increase, the depth of the adjusting screw 52 screwed into one end of the outer cylinder 51 can be appropriately adjusted and locked by the locking nut 55 (specifically, after adjusting the depth of the adjusting screw 52, ​​tighten the locking nut 55 so that it abuts against one end of the outer cylinder 51 to achieve locking), the operation is relatively simple and quick.

[0042] In a preferred embodiment, one end of each of the two lever arms 1 is provided with a blind hole corresponding to the adjusting screw 52 and the telescopic rod 53 respectively. The other end of the adjusting screw 52 is provided with a first plug (b in the figure) and the other end of the telescopic rod 53 is provided with a second plug (c in the figure). The first plug and the second plug are respectively inserted into the corresponding blind holes.

[0043] In the above implementation scheme, during installation, the adjusting screw 52 is fully screwed into the outer cylinder 51, and the telescopic device 3 extends to brake. The gap adjuster 5 is then installed by first inserting the first plug end of the other end of the adjusting screw 52 into the blind hole of the corresponding lever arm 1. The telescopic top rod 53 is then compressed and pressed by hand or tool until the overall length of the gap adjuster 5 is less than the distance between the two lever arms 1. The second plug end is then inserted into the blind hole corresponding to the other lever arm 1 to complete the installation. Removal is straightforward; the process is reversed.

[0044] Both the first plug portion and the second plug portion have ball-shaped ends.

[0045] In a preferred embodiment, the other end of the telescopic top rod 53 is provided with a first limiting part 531 with a cross-sectional area larger than that of the outer cylinder 51, and the outer surface of the other end of the outer cylinder 51 is provided with an annular second limiting part 511. The elastic member 54 is connected between the first limiting part 531 and the second limiting part 511.

[0046] In the above implementation scheme, the design of the first limiting part 531 and the second limiting part 511 facilitates the assembly and connection of the elastic member 54. At the same time, the first limiting part 531 can limit the maximum depth of the telescopic push rod 53 into the outer cylinder 51 (that is, the telescopic push rod 53 can extend into the outer cylinder 51 until the first limiting part 531 abuts against the other end of the outer cylinder 51, which is also the ultimate compression state of the elastic member 54).

[0047] In this embodiment, the elastic element 54 can be a spring, which is sleeved on the other end of the outer cylinder 51.

[0048] In this embodiment, two sets of the gap adjusters 5 are provided and distributed between the two lever arms 1 on both sides of one end. This ensures that the gap can be effectively adjusted on both sides, resulting in a more balanced force and preventing unilateral tilting.

[0049] In this embodiment, an external hexagonal horn for rotating the outer cylinder 51 is integrally provided on the outer surface of one end (a in the figure refers to this).

[0050] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An open caliper with adjustable and limited brake clearance, characterized in that: It includes two lever arms (1), two sets of brake block assemblies (2), a telescopic device (3), a support assembly (4), and a gap adjuster (5). The two lever arms (1) are distributed relatively at intervals. The support assembly (4) is disposed between the two lever arms (1) and is hinged to the middle part of the two lever arms (1) respectively. The telescopic device (3) is connected between one end of the two lever arms (1). The two sets of brake block assemblies (2) are respectively installed at the other end of the two lever arms (1) and are relatively close to each other. The gap adjuster (5) is installed between one end of the two lever arms (1).

2. The adjustable limiting brake gap open caliper according to claim 1, characterized in that: The brake block assembly (2) includes a brake backplate (21) and a brake block (22). One side of the brake backplate (21) is provided with an ear seat (211). The other end of the lever arm (1) extends into the ear seat (211) of the corresponding brake backplate (21) and is pinned to the ear seat (211) by a backplate pin (23) that passes through both. The brake block (22) is mounted on the other side of the brake backplate (21), and the brake blocks (22) of the two brake block assemblies (2) are relatively close to each other.

3. The adjustable limiting brake gap open caliper according to claim 1, characterized in that: The telescopic device (3) includes a telescopic cylinder (31). The cylinder end and telescopic end of the telescopic cylinder (31) are respectively provided with connecting parts (32). The middle part of one end of the two lever arms (1) is respectively provided with a fitting notch. The two connecting parts (32) extend into the fitting notches of the two lever arms (1). The connecting part (32) is provided with a cylinder pin (33) that passes vertically through it and one end of the lever arm (1).

4. The adjustable limiting brake gap open caliper according to claim 3, characterized in that: It also includes a spring-loaded component (34) connected between one end of the two lever arms (1).

5. An adjustable, limiting brake gap open caliper according to claim 4, characterized in that: The rebound component (34) includes two sets of tension springs. Locking pins (331) are respectively provided at both ends of the cylinder pin (33). A set of tension springs is connected between the locking pins (331) of the two cylinder pins (33) located at the same end.

6. An adjustable, limiting brake gap open caliper according to claim 1, characterized in that: The support assembly (4) includes two support rods (41) that are parallel and spaced apart. The middle part of the two lever arms (1) is provided with mounting holes that correspond one-to-one with the two support rods (41). The two ends of the two support rods (41) are respectively embedded in the corresponding mounting holes. The two ends of the two support rods (41) are respectively provided with lever pins (42) that penetrate vertically through the two and pass through the lever arms (1).

7. An adjustable, limiting brake clearance open caliper according to any one of claims 1 to 6, characterized in that: The gap adjuster (5) includes an outer cylinder (51), an adjusting screw (52), a telescopic rod (53), and an elastic element (54). One end of the outer cylinder (51) has an internal thread on its inner wall. One end of the adjusting screw (52) extends into one end of the outer cylinder (51) and is screwed into it. The other end of the adjusting screw (52) is detachably connected to one end of one of the lever arms (1). One end of the telescopic rod (53) extends into the other end of the outer cylinder (51) and is slidably engaged with it. The other end of the telescopic rod (53) is detachably connected to one end of the other lever arm (1). The elastic element (54) is installed between the other end of the telescopic rod (53) and the other end of the outer cylinder (51). One end of the adjusting screw (52) is screwed with a locking nut (55) for abutting or separating from one end of the outer cylinder (51).

8. An adjustable, limiting brake clearance open caliper according to claim 7, characterized in that: One end of each of the two lever arms (1) is provided with a blind hole corresponding to the adjusting screw (52) and the telescopic rod (53) respectively. The other end of the adjusting screw (52) is provided with a first plug portion, and the other end of the telescopic rod (53) is provided with a second plug portion. The first plug portion and the second plug portion are respectively inserted into the corresponding blind holes.

9. An adjustable, limiting brake gap open caliper according to claim 7, characterized in that: The telescopic top rod (53) has a first limiting part (531) with a cross-sectional area larger than that of the outer cylinder (51) at the other end, and the outer surface of the outer cylinder (51) has an annular second limiting part (511) on the other end. The elastic member (54) is connected between the first limiting part (531) and the second limiting part (511).

10. An adjustable, limiting brake gap open caliper according to claim 7, characterized in that: The gap adjuster (5) is provided in two sets and is distributed between the two sides of one end of the two lever arms (1).

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