Positioning clamping arm for rotary platform of excavator

Abstract

The utility model discloses an excavator revolving platform positioning clamping arm which comprises an assembling frame, a limiting piece and an ejecting piece, the limiting piece is assembled on the assembling frame in a sliding mode, the ejecting piece is assembled on the assembling frame and located below the limiting piece, an anti-retreating structure is arranged on the ejecting piece, and the limiting piece and the ejecting piece can be arranged in the same direction. The limiting piece and the jacking piece can move in the axial direction of the limiting piece and the axial direction of the jacking piece respectively, the anti-retreating structure is connected with the assembling frame in a clamped mode to limit retreating of the jacking piece, according to the structure, part of manual operation is replaced with the mechanical positioning clamping arm, the assembling time of the rotary platform can be greatly shortened, and the problems of uncertainty and low efficiency caused by human factors are solved; therefore, the speed of the whole production process is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator assembly, in particular to a positioning clamping arm of an excavator rotary platform. Background Art

[0002] As a crucial component of heavy-duty construction machinery, the design and manufacture of an excavator's slewing platform is crucial to its performance. Traditional slewing platforms typically consist of three main components: the main platform, left platform, and right platform, assembled through welding or bolting. This assembly method requires precise control of the height and flatness of the top rail mounting surface to ensure the stability and accuracy of the entire slewing platform after installation.

[0003] However, in existing manufacturing processes, the assembly of rotary platforms often relies on manual labor, requiring repeated measurements and manual adjustments at key locations to achieve precise alignment between components. While this method can achieve certain accuracy requirements, manual measurement and adjustment is time-consuming and tedious, especially for large rotary platforms. This not only prolongs production cycles but also increases labor costs. Furthermore, due to the lack of unified standards and automated tool support, it's difficult to guarantee ideal flatness every time the rotary platform is assembled. This can lead to performance issues in actual use. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art described above, the utility model provides a positioning clamp arm for an excavator rotary platform, which can solve the problems of low manual measurement efficiency and low flatness qualification rate.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A positioning clamping arm for an excavator slewing platform, comprising:

[0007] assembly rack;

[0008] a limiting member, the limiting member being slidably assembled on the assembly frame;

[0009] A top member, which is assembled on the assembly frame and located below the limiting member, and is provided with an anti-retraction structure;

[0010] The limiting member and the lifting member can be arranged in the same direction, and can move along their respective axial directions. The anti-retraction structure is engaged with the assembly frame to limit the retreat of the lifting member.

[0011] By adopting this solution, when multiple clamp arms form a fixture to secure the slewing platform, the limiter effectively limits the slewing platform's position in the vertical direction, while the lifter adjusts and limits it horizontally. The combination of the two ensures the precise spatial positioning of the slewing platform, thereby improving assembly accuracy and reducing errors caused by repeated manual measurement and adjustment. The anti-retraction structure on the lifter effectively prevents the lifter from retracting after it has been positioned against the slewing platform, thereby ensuring the stability of the slewing platform during assembly and avoiding positioning failures caused by lifter retraction.

[0012] This structure significantly reduces slewing platform assembly time by replacing some manual operations with a mechanized positioning clamp arm, reducing uncertainty and inefficiencies caused by human factors, thereby speeding up the overall production process. Precise positioning and anti-rollback features help ensure ideal flatness every time, thus guaranteeing the quality and service life of the excavator's slewing platform.

[0013] Furthermore, the outer surface of the top piece is provided with an external thread, the external thread constitutes the anti-backward structure, the assembly frame is provided with an assembly hole, the assembly hole is provided with an internal thread that cooperates with the external thread of the top piece, and the top piece is assembled in the assembly hole.

[0014] By adopting this solution and utilizing a simple threaded fit, not only can the design be simplified, but the production process can also be made more convenient. The threaded fit design reduces the need for complex machining, making parts easier to manufacture and assemble, thereby reducing production and maintenance costs. Furthermore, the threaded fit allows for stepless adjustment of the top piece. The operator can achieve precise positioning adjustments by rotating the top piece, greatly improving positioning flexibility and accuracy.

[0015] Furthermore, one end of the top piece is provided with a convenient structure for rotating the top piece.

[0016] By adopting the above solution, since the slewing platform is heavy, adjusting its position requires a greater force. The convenient structural design allows the operator to apply torque more easily, thereby conveniently rotating and adjusting the top piece.

[0017] Furthermore, the convenient structure includes a mounting seat and a pin, the mounting seat is fixedly connected to the top piece, two or more pins are provided, all of the pins are fixed on the side of the mounting seat away from the top piece, and there is a distance between adjacent pins.

[0018] By adopting the above solution, when there are two or more pins, a steel pipe or a crowbar or other tool can be inserted between the two pins to increase the length of the lever arm, thereby reducing the torque required to rotate the top piece and improving the efficiency of rotating the top piece.

[0019] Furthermore, one end of the pin away from the mounting seat is connected to a fixing seat, and all the ends of the pin away from the mounting seat are fixedly mounted on the fixing seat.

[0020] By adopting the above solution, one end of all the pins is fixed on the mounting seat, and the other end is fixed on the fixing seat to form a whole. This can enhance the stability of the pin group during operation and avoid the displacement or deformation of individual pins when subjected to force. The existence of the fixing seat can serve as a stable base point for torque transmission, and the force is evenly distributed to each pin through the fixing seat, making the torque transmission more uniform and efficient, thereby saving more effort when rotating the top piece.

[0021] Furthermore, a top head is provided at one end of the top member away from the convenient structure.

[0022] By adopting this solution, the insertion of the ram increases the contact area between the ram and the rotary platform, providing stable support during the ramming process and ensuring greater stability during adjustment and fixation of the rotary platform. Furthermore, as an independent component, if the ram becomes damaged during use, there is no need to replace the entire ram, reducing maintenance costs.

[0023] Furthermore, an arc-shaped protrusion is provided at one end of the top piece on which the top head is mounted, a cavity is provided on one side of the top head, the cavity is provided with an opening facing the side of the top piece, and a clamping edge is provided facing the inner side of the opening. The top piece is provided with a clamping groove on the side of the arc-shaped protrusion away from the top head, which is engaged with the clamping edge. The arc-shaped protrusion is located in the cavity, and there is a gap between the clamping edge and the side wall of the clamping groove.

[0024] By adopting the above solution, due to the presence of the arc-shaped convex portion and the gap between the clamping edge and the clamping groove, the plug can be adjusted to a certain angle according to the shape of the corresponding position on the rotary platform when in contact with the rotary platform, thereby enabling the plug to better fit the different curved surfaces of the rotary platform, thereby improving the flexibility and accuracy of positioning.

[0025] Furthermore, the assembly frame includes a base and a positioning block, the positioning block is assembled on the top of the base, the limiting member is slidably assembled on the positioning block, and the top member is assembled on the base.

[0026] The above solution, with its separate base and positioning block design, simplifies production and maintenance. The modular design also facilitates replacement or upgrades of individual components without compromising the integrity of the entire system. More importantly, by adjusting the height of the positioning block, the height of the stopper can be adjusted accordingly, allowing the clamp to accommodate rotary platforms of varying heights, enhancing its versatility and adaptability.

[0027] Furthermore, the base is provided with a flange on a side away from the positioning block, and the flange is provided with a screw hole.

[0028] By adopting the above solution, the flange design increases the contact area between the base and the work surface, thereby improving the stability of the assembly bracket when it is placed, and screw holes are provided on the flange, so that the assembly bracket can be directly fixed to the workbench using screws and other fixing parts, thereby avoiding movement due to vibration or external force during use, and improving the stability of the positioning clamp arm.

[0029] Furthermore, the base is provided with a shaft sleeve, the top piece is assembled in the shaft sleeve, the internal thread is provided on the inner wall of the shaft sleeve, and the shaft sleeve is threadedly matched with the top piece.

[0030] By adopting this solution and the modular design of the base and sleeve, the overall structure becomes more flexible. The base can be made of relatively common materials, while only the sleeve needs to be made of high-strength materials. This not only ensures the strength requirements for the contact between the top member and the rotary platform, but also simplifies the production complexity and cost of the base.

[0031] In summary, the positioning clamp arm for the excavator slewing platform provided by the present invention has the following technical effects:

[0032] 1. When multiple clamp arms form a fixture to secure a rotary platform, the limiter effectively limits the platform's position vertically, while the lifter adjusts and limits it horizontally. The combination of the two ensures precise spatial positioning of the rotary platform, thereby improving assembly accuracy and reducing errors caused by repeated manual measurement and adjustment. The anti-retraction structure on the lifter effectively prevents the lifter from retracting after it has been positioned against the rotary platform, ensuring the stability of the rotary platform during assembly and avoiding positioning failures caused by lifter retraction.

[0033] 2. By replacing some manual operations with a mechanized positioning clamp, the slewing platform assembly time can be significantly shortened, reducing the uncertainty and inefficiency caused by human factors, thereby speeding up the overall production process. Precise positioning and anti-rollback functions help ensure that ideal flatness is achieved every time, thus ensuring the quality and service life of the excavator's slewing platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0035] Figure 2 This is a schematic diagram of the explosion structure of the top piece of the utility model;

[0036] Figure 3 This is a schematic diagram of the structure of the ejector in the inclined state of the ejector head of the utility model;

[0037] Figure 4 This is a schematic diagram of the convenient structure usage of the utility model.

[0038] Among them, the meanings of the figure marks are as follows: 11, base; 111, flange; 112, screw hole; 113, sleeve; 12, positioning block; 2, limit member; 3, top member; 31, convenient structure; 311, mounting seat; 312, pin; 313, fixing seat; 32, top head; 321, cavity; 322, snap-fit ​​edge; 33, arc-shaped protrusion; 34, snap-fit ​​groove. DETAILED DESCRIPTION

[0039] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described and discussed below in conjunction with the drawings of the present invention. Obviously, what is described here is only a part of the examples of the present invention, not all the examples. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] In order to facilitate the understanding of the embodiments of the present invention, the following will be further explained with reference to specific embodiments as examples in conjunction with the drawings, and each embodiment does not constitute a limitation on the embodiments of the present invention.

[0041] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0043] See Figure 1-Figure 4 The utility model discloses a positioning clamp arm of an excavator rotary platform: it includes an assembly frame, a limiting member 2 and a top member 3, the limiting member 2 is slidably assembled on the assembly frame, the top member 3 is assembled on the assembly frame and is located below the limiting member 2, and an anti-retraction structure is provided on the top member 3, wherein the limiting member 2 and the top member 3 can be set in the same direction, and the limiting member 2 and the top member 3 can move along their respective axial directions, and the anti-retraction structure is clamped with the assembly frame to limit the retreat of the top member 3.

[0044] Specifically, the limiting member 2 and the top member 3 are both assembled on the assembly frame, and the limiting member 2 is slidably assembled on the assembly frame so that the limiting member 2 can move relative to the assembly frame toward the rotary platform and move to above the rotary platform, thereby realizing the limitation of the rotary platform in the vertical direction. The top member 3 can move relative to the assembly frame toward the rotary platform, and an anti-retraction structure is provided on the top member 3 to prevent the top member 3 from retreating after the rotary platform is abutted in place. Correspondingly, since the limiting member 2 is used to press the rotary platform and the top member 3 is used to abut the rotary platform, the limiting member 2 is provided above the top member 3, and the anti-retraction structure is engaged with the assembly frame to limit the retreat of the top member 3. Among them, the limiting member 2 and the top member 3 can both adopt automated components such as cylinders and oil cylinders, and can also adopt such as Figure 1 The limiting member 2 shown is columnar. By manually sliding the limiting member 2 above the rotary platform, the top member 3 cooperates with the thread of the assembly frame to realize the top member 3's own axial movement and prevent the top member 3 from retreating.

[0045] It should be noted that although the clamping arm requires certain manual operations, compared with the purely manual positioning and moving rotary platform in the prior art, it can significantly improve the work efficiency and the processing accuracy of the rotary platform.

[0046] To facilitate understanding of the working principle of the clamp arms in this application, the following briefly describes the working principle of the clamp formed by the clamp arms. To clamp and secure the rotating platform, at least four of the aforementioned clamp arms are used, positioned in the front, back, left, and right directions of the rotating platform. The four limiting members 2 are each moved above the rotating platform to limit the vertical position of the rotating platform. The rotating platform is then pushed to a preset position by adjusting the movement distance of the four lift members 3. The four lift members 3 are then in contact with the rotating platform to restrict its horizontal movement.

[0047] See Figure 1 As shown, in this embodiment, the outer surface of the top piece 3 is provided with an external thread, the external thread constitutes an anti-backward structure, the assembly frame is provided with an assembly hole, the assembly hole is provided with an internal thread that cooperates with the external thread of the top piece 3, and the top piece 3 is assembled in the assembly hole.

[0048] Specifically, the use of a simple threaded fitting structure not only simplifies the design but also makes the production process more convenient. The threaded fitting design reduces the need for complex machining, making parts easier to manufacture and assemble, thereby reducing production and maintenance costs. Furthermore, the threaded fitting allows the user to perform stepless adjustment of the top piece 3. The operator can achieve precise position adjustments by rotating the top piece 3, greatly improving positioning flexibility and accuracy.

[0049] See Figure 1-Figure 4 As shown, in some embodiments, in order to facilitate the rotation of the top piece 3 , a convenient structure 31 is provided at one end of the top piece 3 for rotating the top piece 3 .

[0050] Specifically, due to the heavy weight of the slewing platform, adjusting its position requires considerable force. The design of the convenient structure 31 allows the operator to more easily apply torque, thereby conveniently adjusting the rotation of the top member 3. The convenient structure 31 can employ a clamping structure that facilitates the fixation of a stick-like object, thereby utilizing the principle of leverage to control the rotation of the top member 3. Alternatively, other structures that facilitate the use of a driver, such as a hexagon socket or other structure that facilitates the use of a motor, can be employed.

[0051] See Figure 1-Figure 4 As shown, in some embodiments, in order to simplify the structure of the convenience structure 31, the convenience structure 31 includes a mounting seat 311 and a pin 312, the mounting seat 311 is fixedly connected to the top piece 3, and two or more pins 312 are provided. All pins 312 are fixed to the side of the mounting seat 311 away from the top piece 3, and there is a distance between adjacent pins 312.

[0052] Specifically, when there are two or more pins 312, a steel pipe or a stick-like tool such as a crowbar can be inserted between the two pins 312. When the stick-like tool is pulled, the stick-like tool is respectively abutted against the opposite sides of the two pins 312 to increase the length of the lever arm, thereby reducing the torque required to rotate the top piece 3 and improving the efficiency of rotating the top piece 3.

[0053] See Figure 1-Figure 3 As shown, in some embodiments, one end of the pin 312 away from the mounting seat 311 is connected to the fixing seat 313 , and all the ends of the pins 312 away from the mounting seat 311 are fixedly mounted on the fixing seat 313 .

[0054] Specifically, one end of all the pins 312 is fixed to the mounting base 311, and the other end is fixed to the fixing base 313, forming a whole. This can enhance the stability of the pin group 312 during operation and avoid the displacement or deformation of a single pin 312 when subjected to force. The existence of the fixing base 313 can serve as a stable base point for torque transmission, and the force is evenly distributed to each pin 312 through the fixing base 313, making the torque transmission more uniform and efficient, thereby saving more effort when rotating the top piece 3.

[0055] See Figure 1-Figure 3 As shown, in some embodiments, a top head 32 is provided at one end of the top member 3 away from the convenient structure 31 .

[0056] Specifically, a plug 32 is provided at the end of the top member 3 away from the convenient structure 31. The shape of the plug 32 can be customized as needed. Generally, to reduce the pressure on the rotating platform, the contact area between the plug 32 and the rotating platform is increased, thereby providing stable support during the lifting process and ensuring greater stability during adjustment and fixing of the rotating platform. Furthermore, as an independent component, the plug 32 does not need to be replaced in its entirety if it becomes damaged during use, reducing maintenance costs.

[0057] See Figure 2-Figure 3 As shown, in some embodiments, in order to improve the adaptability of the top piece 3, an arc-shaped protrusion 33 is provided at one end of the top piece 3 on which the top head 32 is installed, and a cavity 321 is provided on one side of the top head 32. The cavity 321 is provided with an opening facing the side of the top piece 3, and a clamping edge 322 is provided facing the inner side of the opening. The top piece 3 is provided with a clamping groove 34 on the side of the arc-shaped protrusion 33 away from the top head 32, which is engaged with the clamping edge 322. The arc-shaped protrusion 33 is located in the cavity 321, and there is a gap between the clamping edge 322 and the side wall of the clamping groove 34.

[0058] Specifically, refer to Figure 2 and Figure 3 As shown, due to the presence of the arc-shaped protrusion 33 and the gap between the clamping edge 322 and the clamping groove 34, the head 32 can be adjusted to a certain angle according to the shape of the corresponding position on the rotary platform when in contact with the rotary platform, thereby enabling the head 32 to better fit the different curved surfaces of the rotary platform, thereby improving the flexibility and accuracy of positioning.

[0059] See Figure 1 As shown, in some embodiments, in order to further improve the applicability of the clamping arm, the assembly frame includes a base 11 and a positioning block 12, the positioning block 12 is assembled on the top of the base 11, the limit member 2 is slidably assembled on the positioning block 12, and the top member 3 is assembled on the base 11.

[0060] Specifically, the separate design of the base 11 and positioning block 12 simplifies production and maintenance processes. The modular design also facilitates replacement or upgrades of individual components without affecting the integrity of the entire system. More importantly, by adjusting the height of the positioning block 12, the height of the stopper 2 is correspondingly adjusted, allowing the clamp arm to accommodate slewing platforms of varying heights, enhancing its versatility and adaptability.

[0061] See Figure 1 As shown, in some embodiments, in order to facilitate the installation of the base 11 , a flange 111 is provided on a side of the base 11 away from the positioning block 12 , and a screw hole 112 is provided on the flange 111 .

[0062] Specifically, the design of the flange 111 increases the contact area between the base 11 and the work surface, thereby improving the stability of the assembly frame when it is placed, and screw holes 112 are provided on the flange 111, so that the assembly frame can be directly fixed to the workbench using screws and other fixing parts, thereby avoiding movement due to vibration or external force during use and improving the stability of the positioning clamp arm.

[0063] See Figure 1 As shown, in some embodiments, in order to save the production cost of the clamping arm, the base 11 is provided with a sleeve 113, the top piece 3 is assembled in the sleeve 113, the internal thread is provided on the inner wall of the sleeve 113, and the sleeve 113 is threadedly matched with the top piece 3.

[0064] Specifically, the modular design of the base 11 and the sleeve 113 makes the overall structure more flexible. The base 11 can be made of relatively common materials, while only the sleeve 113 needs to be made of high-strength materials. This ensures the strength requirements of the top member 3 when in contact with the rotary platform, while simplifying the production complexity and cost of the base 11.

[0065] The technical means disclosed in the present invention are not limited to those disclosed in the above-mentioned embodiments, but also include technical solutions composed of any combination of the above-mentioned technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A positioning clamp arm for an excavator slewing platform, characterized in that: include: assembly rack; A limiting member (2), wherein the limiting member (2) is slidably assembled on the assembly frame; A top member (3), the top member (3) is assembled on the assembly frame and is located below the limiting member (2), and an anti-retraction structure is provided on the top member (3); The position-limiting member (2) and the top member (3) can both be arranged in the same direction, and can both move along their respective axial directions. The anti-retraction structure is engaged with the assembly frame to limit the retraction of the top member (3).

2. The positioning clamp arm of the excavator rotary platform according to claim 1, characterized in that: The outer surface of the top piece (3) is provided with an external thread, the external thread constitutes the anti-backward structure, the assembly frame is provided with an assembly hole, the assembly hole is provided with an internal thread that matches the external thread of the top piece (3), and the top piece (3) is assembled in the assembly hole.

3. The positioning clamp arm of the excavator rotary platform according to claim 2, characterized in that: One end of the top piece (3) is provided with a convenient structure (31) for rotating the top piece (3).

4. The positioning clamp arm of the excavator rotary platform according to claim 3, characterized in that: The convenient structure (31) comprises a mounting seat (311) and a pin (312), wherein the mounting seat (311) is fixedly connected to the top member (3), and two or more pins (312) are provided. All the pins (312) are fixed to a side of the mounting seat (311) away from the top member (3), and adjacent pins (312) are spaced apart.

5. The positioning clamp arm of the excavator rotary platform according to claim 4, characterized in that: One end of the pin (312) away from the mounting seat (311) is connected to a fixing seat (313), and all ends of the pins (312) away from the mounting seat (311) are fixedly mounted on the fixing seat (313).

6. The positioning clamp arm of the excavator rotary platform according to claim 3, characterized in that: The top piece (3) is provided with a top head (32) at one end away from the convenient structure (31).

7. The positioning clamp arm of the excavator rotary platform according to claim 6, characterized in that: An arc-shaped convex portion (33) is provided at one end of the top member (3) for mounting the top head (32), a cavity (321) is provided on one side of the top member (3), an opening is provided on the side of the cavity (321) facing the top member (3), a clamping edge (322) is provided on the inner side of the opening, and a clamping groove (34) is provided on the side of the arc-shaped convex portion (33) away from the top head (32) to be clamped with the clamping edge (322), the arc-shaped convex portion (33) is located in the cavity (321), and a gap is provided between the clamping edge (322) and the side wall of the clamping groove (34).

8. The positioning clamp arm of the excavator rotary platform according to claim 2, characterized in that: The assembly frame comprises a base (11) and a positioning block (12), wherein the positioning block (12) is assembled on the top of the base (11), the limiting member (2) is slidably assembled on the positioning block (12), and the top member (3) is assembled on the base (11).

9. The positioning clamp arm of the excavator rotary platform according to claim 8, characterized in that: A flange (111) is provided on a side of the base (11) away from the positioning block (12), and a screw hole (112) is provided on the flange (111).

10. The positioning clamp arm of the excavator rotary platform according to claim 8, characterized in that: The base (11) is provided with a shaft sleeve (113), the top piece (3) is assembled in the shaft sleeve (113), the internal thread is provided on the inner wall of the shaft sleeve (113), and the shaft sleeve (113) and the top piece (3) are threadedly matched.

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