Positioning and clamping tool for riveting and welding of boom pulley support

Abstract

The utility model relates to the field of welding technology discloses a positioning clamping tool for boom pulley support riveting and welding, including welding platform, locate the component on welding platform, front locating plate, rear locating plate, clamping component and clamp component, wherein: locate the component by locating block and main locating pin, the width of locating block is equal to the interval between two riser plates of pulley support, the main locating pin is inserted into the middle hole of riser plate at both ends and penetrates locating block, the top of locating block is equipped with locating convex post for locating the sealing plate of pulley support, clamp component is used for clamping two riser plates on both sides of locating block, front locating plate and rear locating plate are sequentially arranged behind locate the component and are used for locating web plate and connecting plate, clamping component is arranged between front locating plate and rear locating plate and is used for pressing web plate and connecting plate on front locating plate and rear locating plate respectively. The utility model realizes the purpose of accurate positioning and fast riveting, guarantees the consistency of product, and reduces the dependence on worker's skill.

Description

Technical Field

[0001] This utility model relates to the field of welding technology, and in particular to a positioning and clamping fixture for riveting and welding a boom pulley bracket. Background Technology

[0002] Pulley supports serve as the mounting base for pulleys and are widely used in various equipment. (See attached image.) Figure 1 The pulley bracket shown is a component of the three-section boom in a 34m boom. The three-section boom is a key structural component, connecting externally to the two-section boom and internally to the four-section boom. The pulley bracket plays a crucial role in connecting these sections, requiring high assembly precision, and is difficult to manufacture with a long production cycle. This pulley bracket is an open box-type mechanism, welded together from two vertical plates (a), an upper sealing plate (b), a middle stiffening plate (c), and an end connecting plate (d). During welding, it is difficult to ensure accurate relative positioning of the steel plates in a free state. Furthermore, the presence of welding thermal stress leads to overall twisting or localized deformation, resulting in low positioning accuracy during riveting and welding, easy deformation during welding, and dimensional deviations after welding. It also fails to meet the coaxiality requirements of the three sets of holes at the ends of the two vertical plates and the coaxiality requirements of the middle hole.

[0003] Based on this, this application provides a simple, convenient and quick-to-use positioning and clamping fixture for riveting and welding that can achieve precise positioning and rapid riveting and welding to solve the above problems. Utility Model Content

[0004] The present invention aims to solve the technical problems existing in the prior art. To this end, the present invention provides a positioning and clamping fixture for riveting and welding a boom pulley bracket that is simple in structure, convenient and quick to use, and capable of precise positioning and rapid riveting and welding.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A positioning and clamping fixture for riveting and welding a boom pulley bracket is provided, comprising a welding platform, a positioning assembly, a front positioning plate, a rear positioning plate, a clamping assembly, and a clamping assembly, wherein: the positioning assembly consists of a positioning block and a main positioning pin; the width of the positioning block is equal to the distance between the two upright plates of the pulley bracket; the main positioning pin passes through the positioning block and its two ends are inserted into the middle holes of the upright plates; the top of the positioning block is provided with a positioning protrusion for positioning the sealing plate of the pulley bracket; the clamping assembly is used to clamp the two upright plates on both sides of the positioning block; the front positioning plate and the rear positioning plate are sequentially arranged behind the positioning assembly for positioning the stiffening plate and the connecting plate; the clamping assembly is arranged between the front positioning plate and the rear positioning plate for pressing the stiffening plate and the connecting plate onto the front positioning plate and the rear positioning plate respectively.

[0007] In some optional embodiments, both the front positioning plate and the rear positioning plate are provided with multiple reinforcing ribs on the side facing away from the clamping assembly; wherein, one side of the rear positioning plate is provided with an end limiting plate for limiting the end of the connecting plate.

[0008] In some alternative embodiments, the clamping assembly includes a wedge-shaped expansion clamping block and a thin hydraulic cylinder, the thin hydraulic cylinder being fixed to the welding platform, with its piston rod passing through the welding platform and connected to the wedge-shaped expansion clamping block.

[0009] In some optional embodiments, the clamp assembly includes a hydraulic cylinder, a hydraulic cylinder mounting base, a connecting block, a push rod, a clamping block, a fixing block, and a connecting rod, wherein: the hydraulic cylinder mounting base is mounted on the welding platform, the hydraulic cylinder is fixed on the hydraulic cylinder mounting base, and its piston rod passes through the hydraulic cylinder mounting base and is connected to the connecting block; two push rods are symmetrically arranged, one end of each push rod is fixedly connected to both ends of the connecting block, and the other end is hinged to the top of the clamping block; the fixing block is fixed on the welding platform in front of the clamping block, and at least one connecting rod is hinged to each end of the fixing block, and the other end of the connecting rod is hinged to the clamping block.

[0010] In some alternative implementations, the push rod is an arc-shaped or V-shaped push rod.

[0011] In some alternative implementations, one to three auxiliary positioning pins are also included for insertion into three sets of holes at the ends of the two uprights.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This utility model achieves rapid assembly of workpieces through modular positioning design, significantly improving riveting and welding efficiency. At the same time, it actively constrains deformation through mechanical limiting and clamping mechanisms, achieving precise positioning and rapid riveting and welding, fundamentally ensuring product consistency, improving product quality, and reducing reliance on worker skills. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1 This is a schematic diagram of the pulley bracket on the three sections of an existing crane boom;

[0016] Figure 2 This is a schematic diagram of the positioning and clamping fixture for riveting and welding the boom pulley bracket provided by this utility model;

[0017] Figure 3 yes Figure 2 Provided top view;

[0018] Figure 4 yes Figure 3 Provided AA section view;

[0019] Figure 5 This is a clamping state diagram of the positioning and clamping fixture for riveting and welding the boom pulley bracket provided by this utility model;

[0020] Figure 6 yes Figure 5 The provided top view.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1—Welding platform, 2—Positioning assembly, 2.1—Positioning block, 2.1.1—Positioning protrusion, 2.2—Main positioning pin, 3—Front positioning plate, 4—Rear positioning plate, 4.1—End limiting plate, 5—Clamping assembly, 5.1—Hydraulic cylinder, 5.2—Hydraulic cylinder fixing seat, 5.3—Connecting block, 5.4—Push rod, 5.5—Clamping block, 5.6—Fixing block, 5.7—Connecting rod, 6—Clamping assembly, 6.1—Wedge-type expansion clamping block, 6.2—Thin hydraulic cylinder, 7—Auxiliary positioning pin, a—Upright plate, b—Sealing plate, c—Firming plate, d—Connecting plate. Detailed Implementation

[0023] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "installation," "connection," and "linking" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Example 1

[0029] This embodiment provides a positioning and clamping fixture for riveting and welding a boom pulley bracket, including a welding platform 1, a positioning assembly 2 disposed on the welding platform, a front positioning plate 3, a rear positioning plate 4, a clamping assembly 5, and a clamping assembly 6, wherein:

[0030] As attached Figure 2 To be continued Figure 4 As shown, the positioning component 2 consists of a positioning block 2.1 and a main positioning pin 2.2. The width of the positioning block 2.1 is equal to the distance between the two upright plates a of the pulley bracket. The main positioning pin 2.2 passes through the positioning block 2.1 and is inserted into the middle hole of the upright plate a at both ends without protruding from the outer side of the upright plate. The top of the positioning block 2.1 is provided with a positioning protrusion 2.1.1 for positioning the sealing plate b of the pulley bracket.

[0031] The clamping assembly 5 is used to clamp the two upright plates a onto both sides of the positioning block 2.1. Preferably, as shown in the attached diagram... Figure 2 and attached Figure 3 As shown, the clamp assembly 5 of this embodiment includes a hydraulic cylinder 5.1, a hydraulic cylinder mounting base 5.2, a connecting block 5.3, a push rod 5.4, a clamping block 5.5, a fixing block 5.6, and a connecting rod 5.7. The hydraulic cylinder mounting base 5.2 is mounted on the welding platform 1. The hydraulic cylinder 5.1 is fixed to the hydraulic cylinder mounting base 5.2, and its piston rod passes through the hydraulic cylinder mounting base and connects to the connecting block 5.3. The push rods 5.4 are symmetrically arranged at both ends of the connecting block 5.3. In this embodiment, the push rods 5.4 can be arc-shaped or V-shaped. The other end of the push rod 5.4 is hinged to the top of the clamping block 5.5. The fixing block 5.6 is fixed on the welding platform 1 in front of the clamping block 5.5, and two connecting rods 5.7 are hinged to its two ends respectively. The other end of the connecting rod 5.7 is hinged to the clamping block 5.5. The clamp assembly designed in this embodiment can convert the linear motion of the hydraulic cylinder into the arc motion of the clamping block, thereby clamping the two upright plates on both sides of the fixed block.

[0032] As attached Figure 2 and attached Figure 3 As shown, the front positioning plate 3 and the rear positioning plate 4 are sequentially disposed behind the positioning assembly 2, and are used to position the rib plate c and the connecting plate d. Preferably, in this embodiment, the front positioning plate 3 and the rear positioning plate 4 are provided with multiple reinforcing ribs on their relatively outer sides to increase the connection strength between the front positioning plate and the rear positioning plate and the welding platform, while ensuring their perpendicularity. In order to limit the end of the connecting plate, this embodiment also provides an end limiting plate 4.1 on one side of the rear positioning plate 4.

[0033] As attached Figure 2 To be continued Figure 4 As shown, the clamping assembly 6 is located between the front positioning plate 3 and the rear positioning plate 4, and is used to press the stiffening plate c and the connecting plate d onto the front positioning plate 3 and the rear positioning plate 4 respectively.

[0034] Preferred options are listed below. Figure 4 As shown, the clamping assembly 6 includes a wedge-shaped expansion clamping block 6.1 and a thin hydraulic cylinder 6.2. The thin hydraulic cylinder 6.2 is fixed to the welding platform 1, and its piston rod passes through the welding platform and is connected to the wedge-shaped expansion clamping block 6.1. The wedge-shaped expansion clamping block is existing technology and will not be described in detail here.

[0035] In practice: Initially, the piston rod of the hydraulic cylinder is retracted, and the piston rod of the thin hydraulic cylinder is extended. Place the two upright plates on both sides of the positioning block, and ensure that the middle hole of each plate enters the main positioning pin. Then, place the reinforcing rib on the front positioning plate and place one end of the connecting plate close to the end limiting plate on the rear positioning plate. First, control the piston rod of the thin hydraulic cylinder to retract, and use the wedge-type expansion clamping block to press the reinforcing rib and the connecting plate onto the front and rear positioning plates respectively. Then, control the piston rod of the hydraulic cylinder to extend, and use the clamping block to press the two upright plates onto both sides of the positioning block, completing the riveting and welding connection of the reinforcing rib, the connecting plate, and the two upright plates. Finally, use the positioning protrusion at the top of the positioning hole to position the sealing plate on the two upright plates, completing the riveting and welding of the sealing plate and the upright plates. After the riveting and welding are completed, loosen the clamping block and the wedge-type expansion clamping block, and remove the workpiece.

[0036] Example 2

[0037] Based on Example 1, as shown in the appendix Figure 5 and attached Figure 6 As shown, this embodiment also includes 1 to 3 auxiliary positioning pins 7, which are used to insert into the 3 sets of holes at the ends of the two upright plates a. These pins not only provide over-positioning for the two upright plates, but also verify whether the 3 sets of holes at the ends of the two upright plates are coaxial, thereby verifying the machining accuracy of the holes at the ends of the two upright plates.

[0038] In practice, before the clamping block clamps the vertical plate, insert the two ends of the auxiliary positioning pin into the holes at the ends of the two vertical plates respectively. After the riveting and welding are completed and the workpiece is removed, take out the auxiliary positioning pin.

[0039] It is worth noting that the hydraulic cylinders and thin hydraulic cylinders in the above embodiments can be replaced by linear actuators such as pneumatic cylinders and electric push rods.

[0040] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning and clamping fixture for riveting and welding a boom pulley bracket, characterized in that: Includes a welding platform, a positioning assembly mounted on the welding platform, a front positioning plate, a rear positioning plate, a clamping assembly, and a clamping clamp assembly, wherein: The positioning component consists of a positioning block and a main positioning pin. The width of the positioning block is equal to the distance between the two upright plates of the pulley bracket. The main positioning pin passes through the positioning block and its two ends are inserted into the middle hole of the upright plate. The top of the positioning block is provided with a positioning protrusion for positioning the sealing plate of the pulley bracket. The clamping assembly is used to clamp the two upright plates on both sides of the positioning block; The front positioning plate and the rear positioning plate are sequentially located behind the positioning assembly and are used to position the rib plate and the connecting plate. The clamping assembly is located between the front positioning plate and the rear positioning plate, and is used to press the stiffening plate and the connecting plate onto the front positioning plate and the rear positioning plate respectively.

2. The positioning and clamping fixture for riveting and welding the boom pulley bracket according to claim 1, characterized in that: Both the front positioning plate and the rear positioning plate have multiple reinforcing ribs on the side facing away from the clamping assembly; wherein, the rear positioning plate has an end limiting plate on one side for limiting the end of the connecting plate.

3. The positioning and clamping fixture for riveting and welding the boom pulley bracket according to claim 1, characterized in that: The clamping assembly includes a wedge-shaped expansion clamping block and a thin hydraulic cylinder. The thin hydraulic cylinder is fixed to the welding platform, and its piston rod passes through the welding platform and is connected to the wedge-shaped expansion clamping block.

4. The positioning and clamping fixture for riveting and welding the boom pulley bracket according to claim 1, characterized in that: The clamp assembly includes a hydraulic cylinder, a hydraulic cylinder mounting base, a connecting block, a push rod, a clamping block, a fixing block, and a connecting rod, wherein: The cylinder mounting base is installed on the welding platform, the cylinder is fixed on the cylinder mounting base, and its piston rod passes through the cylinder mounting base and is connected to the connecting block; Two push rods are symmetrically arranged, with one end of each rod fixedly connected to both ends of the connecting block, and the other end hinged to the top of the clamping block. The fixing block is fixed on the welding platform in front of the clamping block, and at least one connecting rod is hinged to each of its two ends. The other end of the connecting rod is hinged to the clamping block.

5. The positioning and clamping fixture for riveting and welding the boom pulley bracket according to claim 4, characterized in that: The push rod is either arc-shaped or V-shaped.

6. The positioning and clamping fixture for riveting and welding the boom pulley bracket according to any one of claims 1 to 5, characterized in that: It also includes 1 to 3 auxiliary positioning pins, which are used to be inserted into 3 sets of holes at the ends of the two upright plates.

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