A collision protection structure for bucket wheel excavators

Abstract

This utility model discloses a collision prevention structure for a bucket wheel excavator, comprising a mounting base, a buffer assembly on the side wall of the mounting base, a push rod, a buffer fixedly connected to the side wall of the push rod, a driven roller rotatably connected to the other end of the push rod, a buffer spring sleeved on the outer side wall of the push rod, a trigger assembly on the outer circumference of the driven roller, a trigger assembly comprising a trigger rod, a rotating shaft inserted into the side wall of the trigger rod, a cam sleeved on the outer circumference of the rotating shaft, a universal roller fixedly connected to the side wall of the trigger rod, and a return torsion spring sleeved on the outer side wall of the trigger rod. This collision prevention structure for a bucket wheel excavator features universal rolling triggering for sensitive and non-jamming operation; cam-based motion conversion for efficient force transmission; automatic torsion spring reset for continuous early warning; ratchet and pawl mechanical self-locking to prevent rebound; and a two-stage energy absorption system with spring and buffer for flexible braking and ultimate equipment protection.

Description

Technical Field

[0001] This utility model relates to the field of bucket wheel excavator technology, specifically to a bucket wheel excavator anti-collision structure. Background Technology

[0002] Bucket wheel excavators are high-efficiency industrial equipment used for continuous loading and unloading of bulk materials. They are widely used in the stacking and handling of bulk materials such as ore and coal in ports, metallurgy, power plants and other scenarios. To avoid collisions between multiple pieces of equipment or obstacles, a collision protection structure for bucket wheel excavators is designed.

[0003] Although existing anti-collision structures for bucket wheel excavators offer many advantages, they still suffer from the following problems: Some existing mechanical anti-collision bars directly use heavy steel cantilever arms, which experience severe sliding friction with obstacles upon contact. This not only requires a large force to trigger but also easily scratches the equipment or the anti-collision bars themselves, and can even deform and be damaged due to jamming, resulting in low reliability. At the same time, traditional buffer structures lack a one-way locking mechanism. When absorbing huge amounts of energy, the buffer element itself may become a new source of risk, as its stored elastic potential energy may be suddenly released, causing the equipment to rebound and causing a secondary impact on the transmission system. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] 1. Technical problems to be solved:

[0006] To address the problems of bulky and easily damaged triggering mechanisms and uncontrollable buffering processes mentioned above, this utility model is proposed.

[0007] Therefore, the purpose of this utility model is to provide a collision prevention structure for bucket wheel excavators, featuring omnidirectional rolling triggering for sensitive and non-jamming operation; cam-based motion conversion for efficient force transmission; automatic torsion spring reset for continuous early warning; and ratchet and pawl mechanical self-locking to prevent rebound. The spring and buffer provide two-stage energy absorption for flexible braking and ultimate equipment protection.

[0008] 2. Technical Solution:

[0009] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0010] A collision avoidance structure for a bucket wheel excavator includes a frame, a mounting base, a buffer assembly on the side wall of the mounting base, a push rod, a buffer fixedly connected to the side wall of the push rod, a mounting groove at the other end of the push rod, a driven roller rotatably connected to the inner side wall of the mounting groove, a buffer spring sleeved on the outer side wall of the push rod, a trigger assembly on the outer circumference of the driven roller, the trigger assembly including a trigger rod, a rotating shaft inserted into the side wall of the trigger rod, a cam sleeved on the outer circumference of the rotating shaft, a universal roller fixedly connected to the side wall of the trigger rod, and a return torsion spring sleeved on the outer side wall of the trigger rod.

[0011] As a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the frame includes a mounting plate, a mounting base is fixedly connected to the side wall of the mounting plate, a slot is provided on the side wall of the mounting base, the buffer is fixedly connected to the inner side wall of the slot, a guide seat is closely attached to the outer side wall of the mounting base, the mounting plate is fixedly connected to the side wall of the guide seat, a plurality of hinge main seats are fixedly connected to the side wall of the mounting plate, and a plurality of hinge supports are fixedly connected to the side wall of the mounting plate.

[0012] As a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the buffer assembly includes a boss, the side wall of the boss is integrally formed and connected to the top rod, the side wall of the boss is fixedly connected to the buffer spring, and the other end of the buffer spring is fixedly connected to the mounting base.

[0013] In a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the side wall of the rotating shaft passes through multiple hinge main seats, one end of the reset torsion spring is fixedly connected to the trigger rod, and the other end of the reset torsion spring is fixedly connected to the hinge main seat.

[0014] As a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the side wall of the hinge main seat is provided with a connecting groove, the inner side wall of the connecting groove is slidably connected to the trigger rod, the side wall of the hinge main seat is fixedly connected with multiple limiting blocks, the side wall of the hinge support is inserted with a pin, and the outer circumferential wall of the pin is sleeved with a pawl.

[0015] As a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the top of the top rod is integrally formed with multiple ratchet teeth, and the top of the ratchet teeth engages with the pawl.

[0016] As a preferred embodiment of the anti-collision structure for a bucket wheel excavator according to this utility model, the guide seat has a guide groove on its side wall, and the top rod is slidably connected to the inner side wall of the guide groove.

[0017] 3. Beneficial effects:

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This type of anti-collision structure for bucket wheel excavators uses mechanical components such as universal wheels, trigger rods, and cams to complete the entire triggering and sensing process. It fundamentally eliminates the sensitivity to light, dust, rain, magnetic fields, and temperature, and can operate stably in harsh conditions such as dusty or rainy / snowy weather without any interference to its performance. It achieves true all-weather operation. The system does not require external power, and the anti-collision function remains effective even in the absence of power, providing passive safety redundancy for the bucket wheel excavator. At the same time, by using universal wheels as the collision contact point, sliding friction is transformed into rolling friction, which not only greatly reduces the triggering force and makes the system more sensitive to minor collisions, but also effectively avoids the wear or deformation caused by the hard scraping of traditional anti-collision bars against obstacles, significantly extending the service life of the device.

[0020] This type of bucket wheel excavator anti-collision structure achieves instantaneous one-way locking through a pawl-ratchet mechanism, ensuring that the push rod can only move backward after being subjected to force. This ensures that the impact kinetic energy can be effectively absorbed by the rear buffer components, completely eliminating reverse impact damage to the equipment's traveling mechanism caused by the energy rebound of the buffer elements, and protecting core critical components. At the same time, it adopts a two-stage buffer structure composed of a buffer spring and a buffer. The spring responds first, gently absorbing the low-speed, low-energy collision kinetic energy. If the impact force is too large, the push rod continues to move backward to trigger the hydraulic buffer. Through its hydraulic damping characteristics, the huge impact kinetic energy is efficiently dissipated in the form of heat energy, greatly smoothing the impact force curve, significantly reducing the instantaneous peak load on the equipment, and preventing structural components from undergoing plastic deformation or cracking due to instantaneous overload. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. 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. Among them:

[0022] Figure 1 This is a schematic diagram of the overall structure of the anti-collision structure for a bucket wheel excavator according to the present invention;

[0023] Figure 2 This is a top view of the overall structure of the anti-collision structure for a bucket wheel excavator according to this utility model;

[0024] Figure 3 This is a schematic diagram of the frame structure of a bucket wheel excavator anti-collision structure according to the present invention;

[0025] Figure 4 This is a schematic diagram of the buffer component structure of the anti-collision structure of a bucket wheel excavator according to the present invention;

[0026] Figure 5 This is a schematic diagram of the trigger component structure of the anti-collision structure of a bucket wheel excavator according to the present invention.

[0027] The following are the labeling instructions in the diagram: 100, frame; 110, mounting plate; 120, mounting base; 130, guide seat; 140, hinge main seat; 141, limit block; 150, hinge support; 151, pin; 200, buffer self-locking assembly; 210, buffer; 220, push rod; 221, boss; 230, buffer spring; 240, ratchet; 250, pawl; 260, driven roller; 300, trigger assembly; 310, trigger rod; 320, rotating shaft; 330, cam; 340, universal roller; 350, return torsion spring. Detailed Implementation

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] This utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this utility model. In actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0030] The orientation or positional relationship indicated in the terminology is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0031] The term "connection method" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0032] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0033] This utility model provides an overall structural schematic diagram of one embodiment of a bucket wheel excavator anti-collision structure, including:

[0034] Please see Figures 1-5This embodiment of a bucket wheel excavator anti-collision structure includes a frame 100. The frame 100 includes a mounting base 120 for easy installation of a buffer 210. A buffer assembly 200 is provided on the side wall of the mounting base 120, serving as a core mechanism for absorbing and dissipating collision kinetic energy. The buffer assembly 200 includes a push rod 220, serving as a central force transmission mechanism. The side wall of the push rod 220 is in close contact with the buffer 210 to absorb large-energy impacts and prevent the buffer spring 230 from being over-compressed and rebounding, causing secondary impacts. The other end of the push rod 220 has a mounting groove, and a driven roller 260 is rotatably connected to the inner side wall of the mounting groove for mounting the cam 33. The sliding friction of 0 is changed to rolling friction, which greatly reduces wear. A buffer spring 230 is sleeved on the outer wall of the push rod 220 to provide initial and smooth buffering force. A trigger assembly 300 is provided on the outer circumference of the driven roller 260. The trigger assembly includes a trigger rod 310. A rotating shaft 320 is inserted into the side wall of the trigger rod 310. A cam 330 is sleeved on the outer circumference of the rotating shaft 320 to convert the rotational motion of the rotating shaft 320 into the linear motion of the push rod 220. A universal roller 340 is fixedly connected to the side wall of the trigger rod 310 by bolts to make the contact smoother and avoid scratching obstacles. A return torsion spring 350 is sleeved on the outer wall of the trigger rod 310.

[0035] It is worth noting that, in order to provide an installation foundation and load-bearing frame, specifically, the frame 100 includes a mounting plate 110, which serves as the main base for easy overall machining and connection with the bucket wheel excavator. The side wall of the mounting plate 110 is fixedly connected to a mounting base 120 by bolts. The side wall of the mounting base 120 has a slot, and the inner side wall of the slot is fixedly connected to a buffer 210 by bolts. The outer side wall of the mounting base 120 is in close contact with a guide seat 130. The side wall of the guide seat 130 is fixedly connected to the mounting plate 110 by bolts. The side wall of the mounting plate 110 is fixedly connected to multiple hinge main seats 140 by bolts to provide a solid and precise support point for the rotating shaft 320, ensuring the reliability of the movement of each component. The side wall of the mounting plate 110 is fixedly connected to multiple hinge supports 150 by bolts to provide a solid and precise support point for the pin shaft 151.

[0036] Next, in order to effectively buffer the impact energy, the buffer assembly 200 includes a boss 221. In order to provide a clear compressive force surface for the buffer spring 230, the side wall of the boss 221 is integrally formed with a top rod 220. The side wall of the boss 221 is fixedly connected to the buffer spring 230 by bolts. The other end of the buffer spring 230 abuts against the mounting base 120 to ensure that the buffer spring 230 is stably connected.

[0037] Meanwhile, to facilitate the reset of the trigger rod 310, specifically, the side wall of the rotating shaft 320 passes through multiple hinge main seats 140, one end of the reset torsion spring 350 is fixedly connected to the trigger rod 310 by bolts, and the other end of the reset torsion spring 350 is fixedly connected to the hinge main seat 140 by bolts. The reset torsion spring 350 is used to ensure that once the collision is resolved, the trigger rod can automatically return to the warning position, and the outer circumferential wall of the cam 330 is rolledly connected to the driven roller 260.

[0038] Furthermore, to facilitate the connection between the trigger rod 310 and the pawl 250, specifically, the side wall of the hinge main seat 140 is provided with a connecting groove, the inner side wall of the connecting groove is slidably connected to the trigger rod 310, and the side wall of the hinge main seat 140 is fixedly connected with multiple limiting blocks 141 by bolts for limiting the rotation of the trigger rod 310. The side wall of the hinge support 150 is inserted with a pin 151, and the outer circumferential wall of the pin 151 is sleeved with a pawl 250.

[0039] It is worth noting that, in order to improve the buffering effect of the buffer assembly 200, the top of the push rod 220 is integrally connected with multiple ratchet teeth 240. The ratchet teeth 240 are asymmetrical, with one end having a 30-degree angled gentle slope structure, which greatly reduces the force required for the push rod 220 to reset. The buffer spring 230 only requires a small force to allow the push rod 220 to "climb" over the pawl 250, achieving smooth automatic reset. The other end has a 60-degree angled steep slope structure, which ensures that the push rod 220 cannot move backward or rebound on its own under huge impact force, ensuring that the impact energy is fully absorbed by the buffer and spring behind it. The gentle slope structure faces the mounting plate 110, and the steep slope structure faces the trigger rod 310. The top of the ratchet teeth 240 engages with the pawl 250. The pawl 250 and the ratchet teeth 240 work together to allow the push rod 220 to move backward upon impact, but prevent it from rebounding during the buffering process, ensuring that the impact energy must be completely absorbed by the buffer assembly 200.

[0040] Finally, in order to improve the moving stability of the push rod 220, the guide seat 130 has a guide groove on its side wall, and the inner side wall of the guide groove is slidably connected to the push rod 220 to ensure that the push rod 220 can only move horizontally and avoid jamming.

[0041] In addition, the circuits, electronic components and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the internal structure and method.

[0042] Combination Figures 1-5 The specific usage process of the anti-collision structure for a bucket wheel excavator according to this embodiment is as follows:

[0043] 1. When the bucket wheel excavator is running, the trigger rod 310 is kept in a horizontally extended state under the action of the torsion spring, and the universal roller 340 continuously scans the track area in front, and the entire system is in an early warning state.

[0044] 2: When the universal roller 340 contacts an obstacle, it drives the trigger rod 310 to rotate, and pushes the push rod 220 backward through the cam 330. The push rod 220 is immediately locked by the pawl 250 after it moves backward, and then compresses the buffer spring 230 and the buffer 210 in sequence, converting the collision kinetic energy into elastic potential energy and heat dissipation, until the equipment stops smoothly;

[0045] 3: After the operator controls the bucket wheel excavator to retreat and avoid collision, the trigger rod 310 automatically returns to the center under the action of the reset torsion spring 340, and the push rod 220 resets under the thrust of the buffer spring 230 and pushes open the pawl 250 in the process. The entire system silently and automatically returns to the initial warning position, waiting for the next detection.

[0046] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A boom bucket machine anti-collision structure, characterized by, The application relates to a rack (100) comprising a mounting base (120), the side wall of the mounting base (120) is provided with a buffer assembly (200), the buffer assembly (200) comprises a top rod (220), the side wall of the top rod (220) is fixedly connected with a buffer (210), the other end of the top rod (220) is provided with a mounting groove, the inner side wall of the mounting groove is rotatably connected with a driven roller (260), the outer side wall of the top rod (220) is sleeved with a buffer spring (230), the circumferential outer wall of the driven roller (260) is provided with a trigger assembly (300), the trigger assembly comprises a trigger rod (310), the side wall of the trigger rod (310) is inserted with a rotating shaft (320), the circumferential outer wall of the rotating shaft (320) is sleeved with a cam (330), the side wall of the trigger rod (310) is fixedly connected with a universal roller (340), and the outer side wall of the trigger rod (310) is sleeved with a reset torsional spring (350).

2. The boom defense structure of claim 1, wherein The rack (100) comprises a mounting plate (110), the side wall of the mounting plate (110) is fixedly connected with the mounting base (120), the side wall of the mounting base (120) is provided with a slot, the inner side wall of the slot is fixedly connected with the buffer (210), the outer side wall of the mounting base (120) is tightly attached with a guide seat (130), the side wall of the guide seat (130) is fixedly connected with the mounting plate (110), the side wall of the mounting plate (110) is fixedly connected with a plurality of hinge main seats (140), and the side wall of the mounting plate (110) is fixedly connected with a plurality of hinge support seats (150).

3. The boomer anti-collision structure according to claim 2, wherein The buffer assembly (200) comprises a boss (221), the side wall of the boss (221) is integrally connected with the top rod (220), the side wall of the boss (221) is fixedly connected with the buffer spring (230), and the other end of the buffer spring (230) is fixedly connected with the mounting base (120).

4. The boomer anti-collision structure according to claim 3, wherein The side wall of the rotating shaft (320) penetrates through the plurality of hinge main seats (140), one end of the reset torsional spring (350) is fixedly connected with the trigger rod (310), the other end of the reset torsional spring (350) is fixedly connected with the hinge main seat (140), and the circumferential outer wall of the cam (330) is rollingly connected with the driven roller (260).

5. The boom defense structure of claim 4, wherein The side wall of the hinge main seat (140) is provided with a connecting groove, the inner side wall of the connecting groove is slidably connected with the trigger rod (310), the side wall of the hinge main seat (140) is fixedly connected with a plurality of limiting blocks (141), the side wall of the hinge support seat (150) is inserted with a pin shaft (151), and the circumferential outer wall of the pin shaft (151) is sleeved with a ratchet pawl (250).

6. The boomer anti-collision structure according to claim 5, wherein The top of the top rod (220) is integrally connected with a plurality of ratchet teeth (240), and the ratchet teeth (240) are engaged with the ratchet pawl (250).

7. The boomer anti-collision structure according to claim 6, characterized in that, The side wall of the guide seat (130) is provided with a guide groove, and the inner side wall of the guide groove is slidably connected with the top rod (220).

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