Point mounting clamp for four-wheel equalizing beam of crane

Abstract

The utility model discloses a point mounting clamp for a four-wheel equalizing beam of a crane. The point mounting clamp comprises a clamp platform, the first positioning assembly is arranged on the clamp platform and is connected with the equalizing beam bottom plate; the first clamping assembly is arranged on the clamp platform and abuts against the bottom plate; the second positioning assembly is arranged on the clamp platform and abuts against the left end and the right end of the equalizing beam front web. The second clamping assembly is arranged between the second positioning assemblies and is connected with the front web plate; the third positioning assembly is arranged on the clamp platform and abuts against the left end and the right end of the balance beam rear web. The third clamping assembly is arranged between the third positioning assemblies and is connected with the rear web plate; and the fourth positioning assembly is arranged on the second positioning assembly and the third positioning assembly and abuts against a middle partition plate of the balance beam. Compared with the prior art, the technical scheme disclosed by the utility model has the advantages that the manual scribing time can be saved, the spot mounting efficiency and precision are improved, the spot mounting quality of the equalizing beam is improved, and the subsequent automatic welding of the equalizing beam is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of crane machinery manufacturing equipment, and more specifically, to a point-mounting fixture for a crane four-wheel balance beam. Background Technology

[0002] A crane four-wheel balance beam is a beam device that balances the wheel pressure of a crane's four wheels. The crane's four-wheel balance beam is generally connected to a balance trolley via pins, and its main function is to ensure that the load is evenly distributed on each wheel, preventing the crane from tipping over.

[0003] Currently, the four-wheel balance beams in the existing market are typically box-shaped structures with openings at both ends and overall symmetry from left to right and front to back. The box-shaped structure mainly consists of a base plate, front web plate, rear web plate, and a central partition plate. In existing technology, the manufacturing of these four-wheel balance beams usually employs a manual marking and spot-welding method. This involves manually marking and correcting lines on the base plate, front and rear web plates, and central partition plate, fixing the positions of each plate, and then spot-welding. The spot-welding sequence is: base plate – front and rear web plates – central partition plate. After spot-welding, a welding robot performs full welding. Therefore, the spot-welding accuracy requirements are high. However, due to the low accuracy and poor quality consistency of manual marking, it is not conducive to subsequent automated welding, directly leading to a reduction in the overall production efficiency of the four-wheel balance beams and failing to meet the production needs of existing four-wheel balance beams.

[0004] Therefore, how to provide a spot-installation fixture for a crane's four-wheel balance beam that can save manual marking time, improve spot-installation efficiency and accuracy, enhance the spot-installation quality of the balance beam, and facilitate subsequent automated welding of the balance beam has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a spot-installation fixture for a crane four-wheel balance beam, which can save manual marking time, improve the efficiency and accuracy of spot installation, enhance the spot installation quality of the balance beam, and facilitate the subsequent automated welding of the balance beam.

[0006] The technical solution provided by this utility model is as follows:

[0007] This utility model provides a point-mounting fixture for a four-wheel balance beam of a crane, comprising: a fixture platform; a first positioning assembly disposed on the fixture platform and connected to the bottom plate of the balance beam; a first clamping assembly disposed on the fixture platform and abutting against the bottom plate; a second positioning assembly disposed on the fixture platform and abutting against the left and right ends of the front web of the balance beam; a second clamping assembly disposed between the second positioning assemblies and connected to the front web; a third positioning assembly disposed on the fixture platform and abutting against the left and right ends of the rear web of the balance beam; a third clamping assembly disposed between the third positioning assemblies and connected to the rear web; and a fourth positioning assembly disposed on the second positioning assembly and the third positioning assembly and abutting against the middle partition of the balance beam.

[0008] Furthermore, in a preferred embodiment of this utility model, the first positioning assembly includes:

[0009] Positioning support set on the fixture platform;

[0010] Positioning pins are set on the clamping platform and connected to the base plate;

[0011] The first positioning block is disposed on the side wall of the second positioning assembly and the third positioning assembly and abuts against the base plate.

[0012] Furthermore, in a preferred embodiment of the present invention, the first clamping assembly includes:

[0013] Clamping support provided on the fixture platform;

[0014] The support groove is provided on the clamping support;

[0015] A top rod is disposed in the support groove and is movably connected to the clamping support;

[0016] A sliding top block is disposed at the end of the top rod;

[0017] A pin support is provided on the side wall of the sliding top block;

[0018] The rotating top block is movably connected to the pin support;

[0019] The rotating top block abuts against the bottom plate of the equalizing beam.

[0020] Furthermore, in a preferred embodiment of this utility model, the second positioning assembly or the third positioning assembly includes:

[0021] A support platform is mounted on the fixture platform;

[0022] The first support is set on the support platform;

[0023] A pin mechanism is provided on the side wall of the first support;

[0024] A positioning plate is installed on the first support;

[0025] The positioning shaft is set on the positioning plate;

[0026] One end of the positioning shaft passes through the positioning plate, and the other end passes through the positioning hole on the front web of the crane's four-wheel balance beam.

[0027] A limiting pin is provided at one end of the positioning shaft;

[0028] A first positioning block is disposed at the other end of the positioning shaft and abuts against the front web plate;

[0029] A second positioning block is disposed on the first support and abuts against the front web plate;

[0030] A first clamping mechanism is disposed on the first support and connected to the front web plate.

[0031] Furthermore, in a preferred embodiment of this utility model, the first clamping mechanism includes:

[0032] The positioning screw is installed on the first support;

[0033] One end of the positioning screw passes through the first support, and the other end passes through the second positioning block;

[0034] A locking nut is disposed at one end of the positioning screw and abuts against the first support;

[0035] A clamping block is located at the other end of the positioning screw and abuts against the front web plate.

[0036] Furthermore, in a preferred embodiment of this utility model, the second clamping assembly or the third clamping assembly includes:

[0037] The second support is provided on the fixture platform;

[0038] A second clamping mechanism is provided on the second support and connected to the front web plate;

[0039] The pressure roller clamping mechanism is installed on the second support and connected to the front web plate.

[0040] Furthermore, in a preferred embodiment of this utility model, the second support includes:

[0041] A mounting base plate is disposed on the fixture platform;

[0042] A first support plate is disposed on the mounting base plate;

[0043] A second support plate is arranged parallel to the first support plate;

[0044] Mounting through holes are provided on the side walls of the first support plate and the second support plate;

[0045] A reinforcing rib connecting the first support plate and the second support plate;

[0046] Mounting top plate disposed at the top of the first support plate and the second support plate;

[0047] The second positioning block is disposed on the side wall of the first support plate and the second support plate and abuts against the front web plate.

[0048] Furthermore, in a preferred embodiment of this utility model, the pressure roller clamping mechanism includes:

[0049] The pressure roller body is disposed on the first support plate and the second support plate;

[0050] One end of the pressure roller body is set in the mounting through hole, and the other end passes through the positioning hole on the front web of the crane's four-wheel balance beam.

[0051] A drive screw that vertically penetrates the mounting top plate and is movably connected to the mounting top plate;

[0052] A force-applying rod is provided at the top of the drive screw;

[0053] A pressure plate is disposed at the bottom end of the drive screw and abuts against the main body of the pressure roller.

[0054] Furthermore, in a preferred embodiment of this utility model, the pin mechanism includes:

[0055] A mounting bracket disposed on the side wall of the first support;

[0056] A rotating pin is provided on the mounting bracket.

[0057] Furthermore, in a preferred embodiment of this utility model, the fourth positioning assembly includes:

[0058] A rotating rod that is mounted on the mounting bracket and connected to the rotating pin;

[0059] A positioning bracket is mounted on the rotating rod and abuts against the intermediate partition.

[0060] This utility model provides a point-mounting fixture for a crane's four-wheel balance beam, comprising: a fixture platform; a first positioning assembly disposed on the fixture platform and connected to the balance beam's base plate; a first clamping assembly disposed on the fixture platform and abutting against the base plate; a second positioning assembly disposed on the fixture platform and abutting against the left and right ends of the balance beam's front web; a second clamping assembly disposed between the second positioning assemblies and connected to the front web; a third positioning assembly disposed on the fixture platform and abutting against the left and right ends of the balance beam's rear web; a third clamping assembly disposed between the third positioning assemblies and connected to the rear web; and a fourth positioning assembly disposed on the second and third positioning assemblies and abutting against the balance beam's central partition.In the spot-installation fixture for the crane four-wheel balance beam disclosed in this utility model, the crane four-wheel balance beam to be welded is placed on the spot-installation fixture. The balance beam is typically composed of a base plate, a front web plate, a rear web plate, and a middle partition plate. Each plate is sequentially fixed in position by the spot-installation fixture according to a certain installation sequence, followed by spot-installation operations, eliminating the need for manual marking. The main structure of the spot-installation fixture for the crane four-wheel balance beam consists of the fixture platform, a first positioning assembly, a first clamping assembly, a second positioning assembly, a second clamping assembly, a third positioning assembly, a third clamping assembly, and the fourth... The system comprises a positioning assembly; wherein the clamping platform is a welding platform, which is located below the base plate of the equalizing beam to support the entire four-wheel equalizing beam and to install and fix each positioning assembly and clamping assembly; the first positioning assembly is located below the base plate of the equalizing beam to restrict the vertical, horizontal, and lateral movement of the base plate; the first clamping assembly is installed on the clamping platform, located below the base plate of the equalizing beam, and fixes the point-mounted position of the base plate by abutting and clamping it; the second positioning assembly is located on the clamping platform, on the front side of the front web plate. The second positioning assembly is connected to the left and right ends of the front web plate to restrict the front web plate's forward and backward, and left and right movements. A second clamping assembly is provided between the second positioning assemblies, located on the front side of the front web plate, and abuts against positioning holes on the front web plate of the crane's four-wheel balance beam to restrict the front web plate's up and down movements. Secondly, the third positioning assembly is symmetrically arranged with the second positioning assembly, installed on the rear side of the balance beam's rear web plate, and connected to the left and right ends of the rear web plate to restrict... The rear web plate is controlled to move forward and backward, and left and right. A third clamping assembly is provided between the third positioning assembly and the second clamping assembly. The third clamping assembly is symmetrically arranged with the second clamping assembly and abuts against the positioning hole of the rear web plate, thereby restricting the up and down movement of the rear web plate. For the middle partition plate of the equalizing beam, a fourth positioning assembly is installed on the second and third positioning assemblies. The fourth positioning assembly abuts against the middle partition plate of the equalizing beam, thereby restricting the left and right movement of the middle partition plate. Under the clamping of the spot-fitting fixture, the plate is used to complete the spot-fitting welding of the four-wheel equalizing beam. In summary, the technical solution provided by this utility model, compared with the prior art, can save manual scribing time, improve the efficiency and accuracy of spot-fitting, improve the spot-fitting quality of the equalizing beam, and facilitate the subsequent automated welding of the equalizing beam. Attached Figure Description

[0061] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0062] Figure 1 A three-dimensional structural schematic diagram of the point-mounting fixture for the four-wheel balance beam of the crane provided in this embodiment of the utility model;

[0063] Figure 2 Structural schematic diagrams of the first, second, and third equalizing beams provided in this embodiment of the utility model;

[0064] Figure 3 This is a schematic diagram of the structure of the crane four-wheel balance beam installation fixture for the first balance beam provided in this embodiment of the utility model;

[0065] Figure 4 This is a schematic diagram of the structure of the crane four-wheel balance beam installation fixture for mounting the second balance beam according to an embodiment of the present utility model;

[0066] Figure 5 A schematic diagram of the structure of the point-mounting fixture for installing the third equalizing beam of the crane's four-wheel equalizing beam provided in this embodiment of the utility model;

[0067] Figure 6 This is a front view of the point-mounting fixture for the four-wheel balance beam of the crane provided in an embodiment of the present utility model;

[0068] Figure 7 A top view of the point-mounting fixture for the four-wheel balance beam of the crane provided in this embodiment of the utility model;

[0069] Figure 8 A cross-sectional view of the point-mounting fixture for the four-wheel balance beam of the crane provided in an embodiment of this utility model;

[0070] Figure 9 A three-dimensional structural schematic diagram of the first clamping assembly provided in an embodiment of the present utility model;

[0071] Figure 10 A cross-sectional view of the first clamping assembly provided in an embodiment of the present utility model;

[0072] Figure 11 A three-dimensional structural schematic diagram of the second or third positioning assembly provided in an embodiment of the present utility model;

[0073] Figure 12A front view of the second or third positioning assembly provided in an embodiment of the present utility model;

[0074] Figure 13 A top view of the second or third positioning assembly provided in an embodiment of the present utility model;

[0075] Figure 14 A three-dimensional structural diagram of the second or third clamping assembly provided in the embodiments of this utility model;

[0076] Figure 15 A front view of the second or third clamping assembly provided in an embodiment of the present utility model;

[0077] Figure 16 A top view of the second or third clamping assembly provided in an embodiment of the present utility model;

[0078] Figure 17 A three-dimensional structural diagram of the fourth positioning assembly provided in an embodiment of this utility model. Detailed Implementation

[0079] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0080] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0081] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "first", "second", "vertical", "horizontal", "top", "bottom", "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.

[0082] 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 one or more of that feature. In the description of this utility model, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0083] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0084] like Figures 1 to 17 As shown, the point-mounting fixture for the four-wheel balance beam of the crane provided in this embodiment of the utility model includes: a fixture platform 1, a first positioning assembly 2, a first clamping assembly 3, a second positioning assembly 4, a second clamping assembly 5, a third positioning assembly 6, a third clamping assembly 7, and the fourth positioning assembly 8.

[0085] This utility model provides a spot-installation fixture for a four-wheel balance beam of a crane, specifically comprising: a fixture platform 1; a first positioning assembly 2 disposed on the fixture platform 1 and connected to the bottom plate of the balance beam; a first clamping assembly 3 disposed on the fixture platform 1 and abutting against the bottom plate; a second positioning assembly 4 disposed on the fixture platform 1 and abutting against the left and right ends of the front web of the balance beam; a second clamping assembly 5 disposed between the second positioning assemblies 4 and connected to the front web; a third positioning assembly 6 disposed on the fixture platform 1 and abutting against the left and right ends of the rear web of the balance beam; a third clamping assembly 7 disposed between the third positioning assemblies 6 and connected to the rear web; and a fourth positioning assembly 8 disposed on the second positioning assembly 4 and the third positioning assembly 6 and abutting against the middle partition of the balance beam. Compared with the prior art, the technical solution provided by this utility model can save manual marking time, improve the efficiency and accuracy of spot installation, enhance the spot installation quality of the balance beam, and facilitate subsequent automated welding of the balance beam.

[0086] In existing technologies, such as Figure 2 As shown, the types of four-wheel balance beams of the crane include a first balance beam 9, a second balance beam 10, and a third balance beam 11, and the structural components of the balance beams include: a base plate 12, a front web plate 13, a rear web plate 14, and a middle partition plate 15. Figure 3 , 4As shown in Figure 5, the point-installation fixture for the crane's four-wheel equalizing beam disclosed in this utility model can be applied to the first equalizing beam 9, the second equalizing beam 10, and the third equalizing beam 11, enabling point-installation operations for three different equalizing beams. The technical solution of this utility model will be specifically described below with reference to embodiments:

[0087] Specifically, in an embodiment of this utility model, the first positioning assembly 2 includes: a positioning support 201 disposed on the clamping platform 1; a positioning pin 202 disposed on the clamping platform 1 and connected to the base plate; and a first positioning block 203 disposed on the side wall of the second positioning assembly 4 and the third positioning assembly 6 and abutting against the base plate.

[0088] like Figure 8 As shown, the first positioning assembly 2 is used to restrict the vertical, horizontal, and forward / backward movement of the equalization beam base plate 12. In this embodiment of the invention, the first positioning assembly 2 is installed on the clamping platform 1, located below the equalization beam base plate 12. The main structure of the first positioning assembly 2 consists of the positioning support 201, the positioning pin 202, and the first positioning block 203. The positioning support 201 is disposed on the clamping platform 1, and its upper surface abuts against the base plate 12 to support the entire equalization beam and restrict the vertical movement of the base plate 12. The first positioning block 203 is bolted to the side walls of the second positioning assembly 4 and the third positioning assembly 6, specifically installed on the side wall of the support platform 16. The positioning surface of the first positioning block 203 is close to the base plate 12, which can restrict the rotation of the base plate 12 and prevent the base plate 12 from moving forward / backward. The positioning pin 202 is installed on the clamping platform 1 and passes through the positioning hole of the clamping platform 1 and the positioning hole of the base plate 12 to restrict the forward / backward and horizontal movement of the base plate 12.

[0089] Specifically, in an embodiment of this utility model, the first clamping assembly 3 includes: a clamping support 301 disposed on the clamping platform 1; a support groove 302 disposed on the clamping support 301; a push rod 303 disposed in the support groove 302 and movably connected to the clamping support 301; a sliding top block 304 disposed at the end of the push rod 303; a pin support 305 disposed on the side wall of the sliding top block 304; and a rotating top block 306 movably connected to the pin support 305; the rotating top block 306 abutting against the bottom plate of the equalizing beam.

[0090] Specifically, in an embodiment of this utility model, four first clamping assemblies 3 are provided; the four first clamping assemblies 3 are located at the four corners of the bottom of the base plate.

[0091] like Figure 9 , 10As shown, the first clamping assembly 3 is used to clamp the base plate 12, thereby restricting the point mounting position of the base plate 12. In this embodiment of the present invention, the first clamping assembly 3 is configured as a wedge-shaped structure, the main structure of which consists of the clamping support 301, the support groove 302, the push rod 303, the sliding top block 304, the pin support 305, and the rotating top block 306. The clamping support 301 is fixed to the clamping platform 1 with bolts. The support groove 302 is provided at the top of the clamping support 301. The push rod 303 is horizontally installed in the support groove 302 and can move back and forth in the support groove 302. The sliding block 304 is installed at the end of the push rod 303, and the pin support 305 is connected to the sliding block 304. Under the drive of the push rod 303, the pin support 305 moves back and forth in the support groove 302, and the rotating block 306 is disposed on the pin support 305 and is movably connected to the pin support 305. By pushing the sliding block 304 back and forth in the support groove 302 through the push rod 303, the rotating block 306 can be pressed against the base plate 12, thereby clamping the base plate 12.

[0092] Specifically, in the embodiments of this utility model, the second positioning assembly 4 or the third positioning assembly 6 includes: a support platform 16 disposed on the clamping platform 1; a first support 17 disposed on the support platform 16; a pin mechanism 18 disposed on the side wall of the first support 17; a positioning plate 19 disposed on the first support 17; a positioning shaft 20 disposed on the positioning plate 19; one end of the positioning shaft 20 passes through the positioning plate 19, and the other end passes through a positioning hole on the front web of the crane's four-wheel balance beam; a limiting pin 21 disposed at one end of the positioning shaft 20; a first positioning block 22 disposed at the other end of the positioning shaft 20 and abutting against the front web; a second positioning block 23 disposed on the first support 17 and abutting against the front web; and a first clamping mechanism 24 disposed on the first support 17 and connected to the front web.

[0093] like Figure 12 , 13As shown, the second positioning assembly 4 is used to restrict the up-down, left-right, and forward-backward movement of the front web 13 of the equalizing beam, and the third positioning assembly 6 is used to restrict the up-down, left-right, and forward-backward movement of the rear web 14 of the equalizing beam. In this embodiment of the utility model, two of each of the second positioning assembly 4 and the third positioning assembly 6 are provided. Two of the second positioning assemblies 4 are installed at both ends of the front web 13, and two of the third positioning assemblies 6 are installed at both ends of the rear web 14. The second positioning assembly 4 and the third positioning assembly 6 have the same structure and are symmetrically arranged. The main structure of the second positioning assembly 4 or the third positioning assembly 6 consists of the support platform 16, the first support 17, the pin mechanism 18, the positioning plate 19, the positioning shaft 20, the limiting pin 21, the first positioning block 22, the second positioning block 23, and the first clamping mechanism 24. The support platform 16 is bolted to the clamping platform 1, the first support 17 is mounted on the support platform 16, and the positioning plate 19 and the positioning shaft 20 are bolted to the clamping platform 1. 0. A limiting pin 21 and the first positioning block 22 are combined to form an abutment positioning mechanism. The positioning plate 19 is bolted to the support platform 16. One end of the positioning shaft 20 passes through the positioning plate 19, and the other end passes through the positioning hole of the front web plate 13. The limiting pin 21 is installed at one end of the positioning shaft 20 to limit the position of the positioning shaft 20. The first positioning block 22 is provided at the other end of the positioning shaft 20. The first positioning block 22 abuts against the positioning hole of the front web plate 13 to limit the left and right movement of the front web plate 13. Secondly, a second positioning block 23 is provided on the other side of the support platform 16. The second positioning block 23 abuts against the front side of the front web plate 13. The first clamping mechanism 24 is also provided on the first support 17. The first clamping mechanism 24 abuts against the rear side of the front web plate 13. The first clamping mechanism 24 and the second positioning block 23 can clamp the front web plate 13 and limit the front web plate 13 from moving back and forth.

[0094] Specifically, in an embodiment of this utility model, the first clamping mechanism 24 includes: a positioning screw 25 disposed on the first support 17; one end of the positioning screw 25 passes through the first support 17 and the other end passes through the second positioning block 23; a locking nut 26 disposed at one end of the positioning screw 25 and abutting against the first support 17; and a clamping block 27 disposed at the other end of the positioning screw 25 and abutting against the front web plate.

[0095] like Figure 11As shown in the embodiment of this utility model, the main structure of the first clamping mechanism 24 consists of the positioning screw 25, the locking nut 26, and the clamping block 27. The positioning screw 25 is horizontally mounted on the first support 17. One end of the positioning screw 25 extends through the second positioning block 23 mounted on the first support 17 and then extends towards the front web plate 13. The clamping block 27 is provided at the extended end of the positioning screw 25 and abuts against the rear side of the front web plate 13. The locking nut 26 is installed at the end of the positioning screw 25 near the first support 17. The positioning screw 25 is locked by the locking nut 26. By combining the clamping block 27 and the second positioning block 23, the front web plate 13 can be clamped.

[0096] Specifically, in the embodiments of this utility model, the second clamping assembly 5 or the third clamping assembly 7 includes: a second support 30 disposed on the clamping platform 1; a second clamping mechanism 31 disposed on the second support 30 and connected to the front web plate; and a pressure roller clamping mechanism 32 disposed on the second support 30 and connected to the front web plate.

[0097] like Figure 14 , 15 As shown in the embodiment of this utility model, the second clamping assembly 5 and the third clamping assembly 7 have the same structure and are symmetrically arranged. The main structure of the second clamping assembly 5 or the third clamping assembly 7 consists of the second support 30, the second clamping mechanism 31 and the pressure roller clamping mechanism 32. The second clamping mechanism 31 has the same structure as the first clamping mechanism 24 and can restrict the front web plate 13 from moving back and forth. The pressure roller clamping mechanism 32 is installed on the second support 30 and can restrict the front web plate 13 from moving up and down.

[0098] Specifically, in an embodiment of this utility model, the second support 30 includes: a mounting base plate 33 disposed on the clamping platform 1; a first support plate 34 disposed on the mounting base plate 33; a second support plate 35 disposed parallel to the first support plate 34; mounting through holes 36 disposed on the side walls of the first support plate 34 and the second support plate 35; a reinforcing rib plate connecting the first support plate 34 and the second support plate 35; a mounting top plate 37 disposed at the top of the first support plate 34 and the second support plate 35; and a second positioning block 38 disposed on the side walls of the first support plate 34 and the second support plate 35 and abutting against the front web plate.

[0099] like Figure 14As shown in this embodiment of the present invention, the second support 30 is used to install the second clamping mechanism 31 and the pressure roller clamping mechanism 32, and abuts against the front web plate 13; the structure of the second support 30 consists of the mounting base plate 33, the first support plate 34, the second support plate 35, the mounting through hole 36, the reinforcing rib plate, the mounting top plate 37, and the second positioning block 38. The mounting base plate 33 is bolted to the clamping platform 1, and the first support plate 34 and the second support plate 35 are both vertically arranged. On the mounting base plate 33, mounting through holes 36 are provided on the side walls of the first support plate 34 and the second support plate 35. The mounting through holes 36 are used to install the pressure roller clamping mechanism 32, so that the pressure roller clamping mechanism 32 can move up and down in the mounting through holes 36. Secondly, a second positioning block 38 is also provided on the side walls of the first support plate 34 and the second support plate 35. The second positioning block 38 abuts against the front web plate 13, and the front web plate 13 can be restricted to move back and forth by the second positioning block 38.

[0100] Specifically, in an embodiment of this utility model, the pressure roller clamping mechanism 32 includes: a pressure roller body 39 disposed on the first support plate 34 and the second support plate 35; one end of the pressure roller body 39 is disposed in the mounting through hole 36, and the other end passes through the positioning hole on the front web of the crane's four-wheel balance beam; a drive screw 40 vertically penetrating the mounting top plate 37 and movably connected to the mounting top plate 37; a force-adding rod 41 disposed at the top end of the drive screw 40; and a pressure plate 42 disposed at the bottom end of the drive screw 40 and abutting against the pressure roller body 39.

[0101] like Figure 14 , 15As shown in Figure 16, in this embodiment of the present invention, the pressure roller clamping mechanism 32 is used to restrict the vertical movement of the front web plate 13. In this embodiment, the pressure roller clamping mechanism 32 is composed of the pressure roller body 39, the drive screw 40, the force-applying rod 41, and the pressure plate 42; wherein, the pressure roller body 39 is horizontally arranged on the first support plate 34 and the second support plate 35, one end of the pressure roller body 39 passes through the mounting through hole 36 and can move vertically within the mounting through hole 36, while the other end of the pressure roller body 39 passes through the positioning hole of the front web plate 13 and abuts against the front web plate 13; secondly, the force-applying rod 41, the drive screw 40, and the pressure plate 42 form a clamping mechanism, which is used to clamp the pressure roller body 39. In the clamping mechanism, the... A drive screw 40 is vertically mounted on the mounting top plate 37. The pressure plate 42 is mounted on the lower end of the drive screw 40. The pressure plate 42 abuts against the pressure roller body 39. Under the action of the drive, the pressure plate 42 can press the pressure roller body 39 tightly. Furthermore, a joint is provided at the upper end of the drive screw 40. Through the joint, the force-applying rod 41 is connected to the drive screw 40. Under the action of external force, the force-applying rod can rotate in the horizontal plane, thereby driving the drive screw 40 to rotate on a fixed axis, driving the pressure plate 42 to move up and down, so that the pressure plate 42 can abut against and press against the pressure roller body 39, and one end of the pressure roller body 39 can clamp the front web plate 13.

[0102] Specifically, in an embodiment of this utility model, the pin mechanism 18 includes: a mounting bracket 28 disposed on the side wall of the first support 17; and a rotating pin 29 disposed on the mounting bracket 28.

[0103] like Figure 6 , 12 As shown in this embodiment of the present invention, the pin mechanism 18 is used to install the fourth positioning assembly 8; the pin mechanism 18 consists of the mounting bracket 28 and the rotating pin 29, wherein the mounting bracket 28 is disposed on the side wall of the first support 17 and the second support 30; on the first support 17 or the second support 30, the mounting brackets 28 are arranged opposite to each other, and the four positioning assembly 8 is disposed at both ends on the mounting bracket 28; next, the rotating pin 29 is installed on the mounting bracket 28, and the fourth positioning assembly 8 is movably connected to the rotating pin 29, so that the fourth positioning assembly 8 can rotate around the rotating pin 29 as a fulcrum.

[0104] Specifically, in an embodiment of this utility model, the fourth positioning assembly 8 includes: a rotating rod 43 disposed on the mounting bracket 28 and connected to the rotating pin 29; and a positioning bracket 44 disposed on the rotating rod 43 and abutting against the intermediate partition.

[0105] Specifically, in an embodiment of this utility model, the positioning bracket 44 includes: an L-shaped support rod symmetrically arranged on the rotating rod 43 and abutting against the side wall of the intermediate partition plate; and a connecting crossbar arranged between the L-shaped brackets.

[0106] like Figure 1 , 17 As shown in this embodiment of the utility model, the fourth positioning assembly 8 is used to abut against the middle partition plate 15 of the equalizing beam, restricting the left and right movement of the middle partition plate 15; two fourth positioning assemblies 8 are provided, one set on the first support 17 and the other set on the second support 30, the two fourth positioning assemblies 8 are symmetrically arranged; the main structure of the fourth positioning assembly 8 consists of the rotating rod 43 and the positioning bracket 44, wherein the rotating rod 43 is a U-shaped rod, the two ends of the U-shaped rod are set on the mounting bracket 28 and are movably connected to the rotating pin 29; pins are provided at both ends of the U-shaped rod. The rotating pin 29 passes through the pin hole, movably connecting the U-shaped rod to the rotating pin 29, so that both ends of the U-shaped rod are set on the mounting bracket 28; secondly, the positioning bracket 44 includes two symmetrically arranged L-shaped support rods and a connecting crossbar connecting the L-shaped brackets. The L-shaped support rods abut against the middle partition 15. When the middle partition 15 needs to be fixed in position, the rotating rod 43 is rotated, causing the positioning bracket 44 to rotate. After flipping into position, the positioning bracket 44 can abut against the middle partition 15, thereby restricting the left and right movement of the middle partition 15.

[0107] Specifically, in an embodiment of this utility model, the method of using the spot-installation fixture for the crane's four-wheel balance beam is as follows: First, place the balance beam base plate 12 on the positioning support 201, pass the positioning pin 202 through the positioning hole of the base plate 12, and press the positioning block against the front and rear sides of the base plate 12; then, spot-install the front and rear web plates 14, press the pressure roller body 39 by rotating the drive screw 40, so that the bottom surfaces of the front web plate 13 and rear web plate 14 of the balance beam are pressed against the base plate 12; then, pass the positioning shaft 20 through the positioning hole of the front and rear web plates 14 and insert the limiting pin 21. Fix the positioning shaft 20, then tighten the positioning screw 25 and positioning nut to make the front web plate 13 and rear web plate 14 fit against the first positioning block 22 and the second positioning block 23. Then tighten the top rod 303 in the first clamping assembly 3 to make the left and right inclined surfaces of the bottom plate 12 fit against the front and rear web plates 14. Then spot weld the middle weld between the bottom plate 12 and the front and rear web plates 14. Finally, spot weld the middle partition plate 15, rotate the fourth positioning assembly 8 inward, and then fit the front and rear web plates 14 against the positioning surfaces of the fourth positioning assembly 8 and clamp them for spot welding. After spot welding is completed, disassemble the spot welding fixture. First, rotate the fourth positioning assembly 8 outward, then loosen the pressure plate 42, take out the pressure roller body 39, then loosen the positioning nut and top rod 303, and remove the positioning screw 25 and the sliding top block 304. The four-wheel balance beam that has been spot welded can then be taken out.

[0108] As described above, this utility model addresses the problem of manual marking and welding of existing driven trolley frames by proposing a spot-installation fixture that eliminates the need for manual marking and correction during the spot-installation of the crane's four-wheel balance beam. In the spot-installation fixture for the crane's four-wheel balance beam disclosed in this utility model, the crane's four-wheel balance beam to be welded is placed on the spot-installation fixture. The balance beam typically consists of a base plate 12, a front web plate 13, a rear web plate 14, and a middle partition plate 15. Each plate is sequentially fixed in position by the spot-installation fixture according to a certain installation sequence, followed by spot-installation, eliminating the need for manual marking. The main structure of the spot-installation fixture for the crane's four-wheel balance beam consists of a fixture platform 1, a first positioning assembly 2, a first clamping assembly 3, a second positioning assembly 4, a second clamping assembly 5, a third positioning assembly 6, a third clamping assembly 7, and a fourth positioning assembly... The system consists of eight components; wherein the clamping platform 1 is a welding platform, which is located below the equalizing beam base plate 12 and is used to support the entire four-wheel equalizing beam and to install and fix each positioning assembly and clamping assembly; the first positioning assembly 2 is located below the equalizing beam base plate 12 and is used to restrict the vertical, horizontal, and lateral movement of the base plate 12; the first clamping assembly 3 is installed on the clamping platform 1, located below the equalizing beam base plate 12, and fixes the point mounting position of the base plate 12 by abutting and clamping the base plate 12; the second positioning assembly 4 is located on the clamping platform 1, located on the front side of the front web plate 13. The second positioning assembly 4 is connected to the left and right ends of the front web plate 13 to restrict the front web plate 13 from moving forward and backward, and left and right. A second clamping assembly 5 is provided between the second positioning assemblies 4, located on the front side of the front web plate 13, and abuts against the positioning holes of the front web plate 13 to restrict the front web plate 13 from moving up and down. Secondly, the third positioning assembly 6 is symmetrically arranged with the second positioning assembly 4, and is installed on the rear side of the rear web plate 14 of the equalizing beam. The third positioning assembly 6 is connected to the left and right ends of the rear web plate 14 to restrict the front web plate 13 from moving forward and backward, and left and right. The rear web plate 14 moves forward and backward and left and right, and the third clamping assembly 7 is provided between the third positioning assembly 6. The third clamping assembly 7 and the second clamping assembly 5 are symmetrically arranged. The third clamping assembly 7 abuts against the positioning hole of the rear web plate 14, which can restrict the up and down movement of the rear web plate 14. For the middle partition plate 15 of the balance beam, the fourth positioning assembly 8 is installed on the second positioning assembly 4 and the third positioning assembly 6. The fourth positioning assembly 8 abuts against the middle partition plate 15 of the balance beam, thereby restricting the left and right movement of the middle partition plate 15, so that the plate can complete the spot welding of the four-wheel balance beam under the clamping of the spot fixture.In summary, the technical solution provided by this utility model, compared with the prior art, can save manual marking time, improve the efficiency and accuracy of spot assembly, enhance the spot assembly quality of the equalization beam, and facilitate the subsequent automated welding of the equalization beam.

[0109] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A point-mounting fixture for a four-wheel balance beam of a crane, characterized in that, include: Fixture platform; The first positioning assembly is mounted on the clamping platform and connected to the bottom plate of the equalization beam. A first clamping assembly is disposed on the clamping platform and abuts against the base plate; The second positioning assembly is mounted on the clamping platform and abuts against the left and right ends of the front web of the equalization beam. The second clamping assembly is disposed between the second positioning assemblies and connected to the front web plate; The third positioning assembly is mounted on the clamping platform and abuts against the left and right ends of the rear web of the equalization beam. A third clamping assembly is disposed between the third positioning assemblies and connected to the rear web plate; A fourth positioning assembly is disposed on the second positioning assembly and the third positioning assembly and abuts against the middle partition of the equalizing beam; the first clamping assembly includes: a clamping support disposed on the clamping platform; a support groove disposed on the clamping support; a push rod disposed in the support groove and movably connected to the clamping support; a sliding block disposed at the end of the push rod; a pin support disposed on the side wall of the sliding block; and a rotating block movably connected to the pin support.

2. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 1, characterized in that, The first positioning assembly includes: Positioning support set on the fixture platform; Positioning pins are set on the clamping platform and connected to the base plate; The first positioning block is disposed on the side wall of the second positioning assembly and the third positioning assembly and abuts against the base plate.

3. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 1, characterized in that, The rotating top block abuts against the bottom plate of the equalizing beam.

4. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 1, characterized in that, The second positioning assembly and the third positioning assembly include: A support platform is mounted on the fixture platform; The first support is set on the support platform; A pin mechanism is provided on the side wall of the first support; A positioning plate is installed on the first support; The positioning shaft is set on the positioning plate; One end of the positioning shaft passes through the positioning plate, and the other end passes through the positioning hole on the front web of the crane's four-wheel balance beam. A limiting pin is provided at one end of the positioning shaft; A first positioning block is disposed at the other end of the positioning shaft and abuts against the front web plate; A second positioning block is disposed on the first support and abuts against the front web plate; A first clamping mechanism is disposed on the first support and connected to the front web plate.

5. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 4, characterized in that, The first clamping mechanism includes: The positioning screw is installed on the first support; One end of the positioning screw passes through the first support, and the other end passes through the second positioning block; A locking nut is disposed at one end of the positioning screw and abuts against the first support; A clamping block is located at the other end of the positioning screw and abuts against the front web plate.

6. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 1, characterized in that, The second clamping assembly or the third clamping assembly includes: The second support is provided on the fixture platform; A second clamping mechanism is provided on the second support and connected to the front web plate; The pressure roller clamping mechanism is installed on the second support and connected to the front web plate.

7. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 6, characterized in that, The second support includes: A mounting base plate is disposed on the fixture platform; A first support plate is disposed on the mounting base plate; A second support plate is arranged parallel to the first support plate; Mounting through holes are provided on the side walls of the first support plate and the second support plate; A reinforcing rib connecting the first support plate and the second support plate; Mounting top plate disposed at the top of the first support plate and the second support plate; The second positioning block is disposed on the side wall of the first support plate and the second support plate and abuts against the front web plate.

8. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 7, characterized in that, The pressure roller clamping mechanism includes: The pressure roller body is disposed on the first support plate and the second support plate; One end of the pressure roller body is set in the mounting through hole, and the other end passes through the positioning hole on the front web of the crane's four-wheel balance beam. A drive screw that vertically penetrates the mounting top plate and is movably connected to the mounting top plate; A force-applying rod is provided at the top of the drive screw; A pressure plate is disposed at the bottom end of the drive screw and abuts against the main body of the pressure roller.

9. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 4, characterized in that, The pin mechanism includes: A mounting bracket disposed on the side wall of the first support; A rotating pin is provided on the mounting bracket.

10. The point-mounting fixture for the four-wheel balance beam of a crane according to claim 9, characterized in that, The fourth positioning assembly includes: A rotating rod that is mounted on the mounting bracket and connected to the rotating pin; A positioning bracket is mounted on the rotating rod and abuts against the intermediate partition.

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