Bucket tooth falling monitoring device and excavator

Abstract

The invention discloses a bucket tooth falling-off monitoring device and an excavator, and belongs to the technical field of mining machinery, the bucket tooth falling-off monitoring device comprises a monitoring mechanism, the monitoring mechanism comprises a monitoring assembly and a magnet assembly, a first connecting position is arranged in a containing groove, and a second connecting position is arranged at the position, right opposite to the first connecting position, of the head of a tooth holder; one of the first connecting position and the second connecting position is provided with a monitoring assembly, the other connecting position is provided with a magnet assembly, the distance between the monitoring assembly and the magnet assembly is a first distance value, and the monitoring assembly judges the first distance value by judging the change of the oscillation amplitude of an LRC circuit of the monitoring assembly caused by the change of the distance between the magnet assembly and the monitoring assembly; and when the oscillation amplitude is higher than a threshold value, the monitoring assembly generates prompt information. The excavator is provided with the bucket tooth falling monitoring device. Through cooperation of the detection assembly and the magnet assembly, the monitoring effect is optimized, and the monitoring distance of the monitoring assembly is increased.

Description

Technical Field

[0001] The invention relates to the technical field of mining machinery, and in particular to a bucket tooth falling monitoring device and an excavator. Background Art

[0002] During mining and excavation, the excavation components on the excavator bucket are usually subjected to high-intensity use and frequent impacts, especially when mining hard rocks or strata containing large rocks. The high-intensity working condition can easily cause the bucket teeth, lip guards, wing guards and other components on the bucket to be damaged or worn, or even fall off, thus posing a safety hazard. Therefore, it is necessary to install a monitoring device on the bucket to monitor whether the bucket teeth and other components fall off, and to provide feedback to the operator to ensure that the mining operation is carried out smoothly and safely.

[0003] The prior art (CN202310174968.5) discloses a bucket tooth fall-off detection and retrieval device, which detects the distance information between the tooth holder and the bucket tooth through a metal detection unit and sends the distance information to a control unit. The wireless terminal device can determine whether the bucket tooth has fallen off based on the output information of the control unit, and after the bucket tooth falls off, the fallen bucket tooth is retrieved based on the communication signal between the wireless terminal device and the control unit.

[0004] The above-mentioned metal detection unit mainly detects the change in the inductance of the induction coil inside the sensor by detecting the distance between the metal close to the sensor and the sensor, thereby determining whether the bucket tooth is installed or detached. However, on the one hand, since the bucket tooth is made of iron material, it will be magnetized by the magnetic field generated by the coil inside the sensor. After the iron is magnetized, the arrangement of the magnetic domains inside it is not completely orderly, which leads to an increase in magnetic resistance, which reduces the propagation efficiency of the magnetic field generated by the electromagnetic coil of the sensor in the bucket tooth, resulting in a decrease in the inductance of the coil, thereby affecting the monitoring effect and causing false alarms. On the other hand, in the actual mining process, as the bucket is used for a longer time, the end face of the tooth seat of the bucket is constantly worn, causing the gap between the tooth seat and the bucket tooth to gradually increase, thereby exceeding the detection range of the sensor, causing the bucket tooth detachment monitoring system to fail. Summary of the invention

[0005] The object of the present invention is to provide a bucket tooth fall-off monitoring device and an excavator, so as to solve the technical problems of low monitoring accuracy and short monitoring distance of the bucket tooth fall-off monitoring device in the prior art.

[0006] As conceived above, the technical solution adopted by the present invention is:

[0007] In one aspect, the present invention provides a bucket tooth falling-off monitoring device, comprising:

[0008] The monitoring mechanism includes a monitoring component and a magnet component. A first connecting position is arranged in the accommodating groove, and a second connecting position is arranged on the head of the tooth seat opposite to the first connecting position. The monitoring component is arranged on one of the first connecting position and the second connecting position, and the magnet component is arranged on the other. The distance between the monitoring component and the magnet component is a first distance value. The monitoring component judges the first distance value by judging whether the change in the distance between the magnet component and the monitoring component causes the change in the oscillation amplitude of the LRC circuit of the monitoring component, thereby judging whether the bucket tooth has fallen off the tooth seat. When the oscillation amplitude is higher than a threshold value, the monitoring component generates a prompt message.

[0009] Preferably, the magnet assembly is arranged at the second connection position, a positioning groove is provided on the second connection position, and the magnet assembly is snap-connected to the positioning groove.

[0010] Preferably, the magnet assembly comprises a magnet unit, a shell and a shell cover, the shell is engaged with the positioning groove, the shell cover is used to open or close the shell, and the magnet unit is arranged in the shell.

[0011] Preferably, the magnet assembly further comprises a buffer sleeve, and the buffer sleeve is coated on the outer circumference of the magnet unit.

[0012] Preferably, the magnet unit is configured as a permanent magnet.

[0013] Preferably, the inner wall of the shell is provided with a magnetic conductive layer.

[0014] Preferably, a card slot is provided on the first connection position, the monitoring component comprises a sensor and a protective shell, the protective shell is snapped into the card slot, and the sensor is arranged in the protective shell.

[0015] Preferably, the protective shell protrudes from the tail of the bucket tooth in a direction close to the second connecting position.

[0016] Preferably, the protective shell is made of super wear-resistant material.

[0017] On the other hand, the present invention also provides an excavator equipped with the above-mentioned bucket tooth falling monitoring device.

[0018] Beneficial effects of the present invention:

[0019] The bucket tooth falling-off monitoring device proposed in the present invention determines the first distance value by using the monitoring component to determine the change in the distance between the magnet component and the monitoring component, thereby causing the change in the oscillation amplitude of the LRC circuit of the monitoring component. Whether the bucket tooth has fallen off from the tooth seat can be determined based on the size of the first distance value. The oscillation amplitude is proportional to the inductance, that is, the smaller the inductance, the smaller the oscillation amplitude. When there is no magnet component approaching, the inductance is maximum and the oscillation amplitude is maximum; when the magnet component approaches, the inductance decreases and the oscillation amplitude decreases. A threshold is set on the monitoring component. When the oscillation amplitude is less than the threshold, it indicates that the first distance value between the monitoring component and the magnet component is less than the set value, and the bucket tooth and the tooth seat are in an installed state; when the oscillation amplitude is greater than the threshold, it indicates that the first distance value between the monitoring component and the magnet component is greater than the set value, that is, the bucket tooth is in a state of falling off from the tooth seat, thereby generating a prompt message for the operator to handle. Moreover, the magnet assembly can generate a magnetic field, which will magnetize the shielding sticker (flexible magnetic material) of the coil inside the monitoring assembly, causing the magnetic permeability of the shielding sticker itself to decrease, resulting in a further decrease in the inductance of the monitoring assembly. When the magnet assembly is close to the monitoring assembly, the decrease in inductance is greater than when conventional metal is close, making the change in oscillation amplitude more obvious, thereby improving the detection accuracy of the monitoring assembly, preventing false alarms, and optimizing the monitoring effect. In addition, the magnet assembly makes the inductance inside the monitoring assembly decrease more and the oscillation amplitude change more at the same detection distance, that is, when the oscillation amplitude of the LRC circuit inside the monitoring assembly is the same, the magnet assembly can obtain a farther detection distance than iron and other metals. Even if the spacing between the bucket teeth and the tooth seat gradually increases with the wear of the bucket, that is, when the first distance value between the monitoring assembly and the magnet assembly increases, the monitoring assembly and the magnet assembly can still achieve an effective monitoring effect, thereby improving the monitoring distance of the monitoring assembly, avoiding the problem of failure of the bucket tooth shedding detection device, and reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a first structural schematic diagram of a bucket tooth falling-off monitoring device provided in Embodiment 1 of the present invention;

[0021] Figure 2 is a second structural schematic diagram of the bucket tooth falling monitoring device provided in the first embodiment of the present invention;

[0022] Figure 3 is a cross-sectional view of a bucket tooth falling monitoring device provided in Embodiment 1 of the present invention;

[0023] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0024] In the figure:

[0025] 100, bucket tooth; 101, receiving groove; 102, first connecting position; 103, clamping groove; 200, tooth seat; 201, second connecting position; 202, positioning groove;

[0026] 10. Monitoring mechanism; 11. Monitoring assembly; 111. Sensor; 112. Protective shell; 12. Magnet assembly; 121. Magnet unit; 122. Shell; 123. Shell cover; 124. Buffer sleeve. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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 the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0031] Embodiment 1

[0032] An embodiment of the present invention provides a bucket tooth falling-off monitoring device, which is used to determine whether a bucket tooth has fallen off from a tooth seat.

[0033] See also Figures 1 to 4The bucket tooth falling-off monitoring device provided by the embodiment of the present invention includes a monitoring mechanism 10. The monitoring mechanism 10 includes a monitoring component 11 and a magnet component 12. A first connection position 102 is provided in the accommodating groove 101. A second connection position 201 is provided at the head of the tooth seat 200 opposite to the first connection position 102. One of the first connection position 102 and the second connection position 201 is provided with a monitoring component 11, and the other is provided with a magnet component 12. The distance between the monitoring component 11 and the magnet component 12 is a first distance value. The monitoring component 11 determines the first distance value by determining whether the change in the distance between the magnet component 12 and the monitoring component 11 causes a change in the oscillation amplitude of the LRC circuit of the monitoring component 11, thereby determining whether the bucket tooth 100 falls off from the tooth seat 200. When the oscillation amplitude is higher than the threshold value, the monitoring component 11 generates a prompt message.

[0034] The settings of the first distance value and the threshold value need to be adaptively adjusted according to actual working conditions and are not limited here.

[0035] The bucket tooth falling-off monitoring device proposed in the present invention determines the first distance value by judging the change of the distance between the magnet component 12 and the monitoring component 11 through the monitoring component 11, which causes the change of the oscillation amplitude of the LRC circuit of the monitoring component 11. According to the first distance value, it can be judged whether the bucket tooth 100 falls off from the tooth seat 200. Among them, the oscillation amplitude is proportional to the inductance, that is, the smaller the inductance, the smaller the oscillation amplitude. When there is no magnet component 12 approaching, the inductance is the largest and the oscillation amplitude is the largest; when the magnet component 12 approaches, the inductance will decrease and the oscillation amplitude will decrease. A threshold is set on the monitoring component 11. When the oscillation amplitude is less than the threshold, it indicates that the first distance value between the monitoring component 11 and the magnet component 12 is less than the set value, and the bucket tooth 100 and the tooth seat 200 are in the installed state; when the oscillation amplitude is greater than the threshold, it indicates that the first distance value between the monitoring component 11 and the magnet component 12 is greater than the set value, that is, the bucket tooth 100 is in the state of falling off from the tooth seat 200, thereby generating a prompt message for the operator to handle. Furthermore, the magnetic component 12 can generate a magnetic field, which can magnetize the shielding sticker (flexible magnetic material) of the coil inside the monitoring component 11, causing the magnetic permeability of the shielding sticker itself to decrease, resulting in a further decrease in the inductance of the monitoring component 11. As a result, when the magnetic component 12 is close to the monitoring component 11, the decrease in inductance is greater than when conventional metal is close, making the change in oscillation amplitude more obvious, thereby improving the detection accuracy of the monitoring component 11, preventing false alarms, and optimizing the monitoring effect. In addition, the magnetic component 12 causes the inductance inside the monitoring component 11 to decrease more and the oscillation amplitude to change more at the same detection distance, that is, when the oscillation amplitude of the LRC circuit inside the monitoring component 11 is the same, the magnetic component 12 can achieve a farther detection distance than iron and other metals. Even if the distance between the bucket tooth 100 and the tooth seat 200 gradually increases with the wear of the bucket, that is, the first distance value between the monitoring component 11 and the magnet component 12 increases, an effective monitoring effect can still be achieved between the monitoring component 11 and the magnet component 12, thereby increasing the monitoring distance of the monitoring component 11, avoiding the problem of failure of the bucket tooth 100 falling off detection device, and reducing the cost of use.

[0036] The specific structure of the above-mentioned bucket tooth falling monitoring device is described in detail below.

[0037] In order to ensure the best monitoring effect, the first connection position 102 is set at the bottom point of the accommodating groove 101, and the second connection position 201 is set at the end of the head of the tooth seat 200. For the convenience of description in conjunction with the drawings, the directions below are described in the directions shown in the drawings, but are not limited thereto.

[0038] Regarding the setting positions of the monitoring component 11 and the magnet component 12, the monitoring component 11 can be set at the first connection position 102, and the magnet component 12 can be set at the second connection position 201; or the monitoring component 11 can be set at the second connection position 201, and the magnet component 12 can be set at the first connection position 102. No limitation is made here, and it is only necessary to ensure that the two are respectively set at the first connection position 102 and the second connection position 201.

[0039] In this embodiment, the magnet assembly 12 is arranged at the second connection position 201, and the tooth seat 200 is relatively stable. The magnet assembly 12 is arranged at the second connection position 201 of the tooth seat 200, which can reduce the impact and vibration thereof and reduce the possibility of damage. A positioning groove 202 is provided on the second connection position 201, and the magnet assembly 12 is snapped into the positioning groove 202. The positioning groove 202 provides a clear installation position for the magnet assembly 12, ensuring that it is in an accurate position each time it is installed, thereby ensuring the stability of the relative position between the magnet assembly 12 and the monitoring assembly 11, and improving the accuracy and reliability of monitoring. The snap connection enables the magnet assembly 12 to be firmly fixed in the positioning groove 202, reducing the possibility of displacement of the magnet assembly 12 due to vibration or impact during the operation of the bucket tooth 100, and ensuring the continuity and stability of monitoring.

[0040] Specifically, the magnet assembly 12 includes a magnet unit 121, a shell 122 and a shell cover 123, the shell 122 is snap-fitted with the positioning groove 202, the shell cover 123 is used to open or close the shell 122, and the magnet unit 121 is arranged in the shell 122. The shell 122 and the shell cover 123 can provide good physical protection for the magnet unit 121, prevent the magnet unit 121 from being extruded, worn, rusted in water, oxidized, etc., thereby extending the service life of the magnet unit 121. In addition, by encapsulating the magnet unit 121 in the shell 122, the influence of the external environment on the magnet performance can be reduced, the stability and consistency of its magnetic field can be ensured, and the accuracy of monitoring can be improved. The setting of the shell cover 123 improves the flexibility of the magnet assembly 12, so that the magnet unit 121 can be replaced and repaired by opening the shell cover 123, ensuring the long-term and stable effective use of the magnet assembly 12.

[0041] Furthermore, the magnet assembly 12 also includes a buffer sleeve 124, which is coated on the outer periphery of the magnet unit 121. The buffer sleeve 124 can absorb and buffer the impact and vibration from the outside during the operation of the bucket tooth 100, reduce the direct impact on the magnet unit 121, protect the magnet unit 121 from physical damage, and extend its service life. Specifically, the buffer sleeve 124 can be a rubber sleeve, a silicone sleeve, or a sponge sleeve, etc., which will not be described in detail here.

[0042] Furthermore, the inner wall of the shell 122 is provided with a magnetic conductive layer. The magnetic conductive layer can guide and concentrate the magnetic field generated by the magnet unit 121, enhance the strength and directionality of the magnetic field, and improve the sensitivity of the monitoring component 11 to changes in the magnetic field, thereby improving the accuracy of monitoring. In addition, the magnetic conductive layer helps to reduce the leakage of the magnetic field to the outside of the shell 122, so that more magnetic lines of force are concentrated within the sensing range of the monitoring component 11, ensuring the effectiveness and stability of monitoring. The magnetic conductive layer can be made of existing magnetic conductive materials such as silicon steel sheets and Permalloy, which will not be elaborated here.

[0043] About the magnet unit 121. In the present embodiment, the magnet unit 121 is configured as a permanent magnet. The permanent magnet itself can generate a magnetic field, does not require an external power supply or continuous energy input, reduces dependence on external energy, and makes the operation of the monitoring device more independent and stable. In addition, the magnetic field of the permanent magnet is relatively stable, not easily affected by external environmental factors such as temperature, humidity and power supply fluctuations, and can maintain stable magnetic field characteristics for a long time, ensuring the accuracy and reliability of monitoring. In addition, the permanent magnet structure is relatively simple, without complex electromagnetic coils or power supply systems, reduces failure points, and improves the durability and service life of the entire magnet unit 121. In other embodiments, the magnet unit 121 can also use components such as electromagnets and superconducting magnets, which are not limited here, and it is only necessary to ensure that the magnet unit 121 can generate a magnetic field.

[0044] Regarding the monitoring component 11, a card slot 103 is provided on the first connection position 102. The monitoring component 11 includes a sensor 111 and a protective shell 112. The protective shell 112 is snapped into the card slot 103, and the sensor 111 is arranged in the protective shell 112. The protective shell 112 is snapped into the card slot 103, which can ensure that the monitoring component 11 is firmly installed in the first connection position 102, reduce the risk of displacement or falling off of the monitoring component 11 due to vibration, impact, etc. during operation, and ensure the continuity and stability of monitoring. In addition, the protective shell 112 provides effective physical protection for the sensor 111, protects it from external collisions, dust, moisture and other contaminants, prolongs the service life of the sensor 111, and ensures its stable performance.

[0045] It is understandable that the sensor 111 uses an existing device, and its working principle and specific structure are not limited here.

[0046] When the excavation assembly is working, finer soil and sand powder will enter the accommodating cavity of the bucket tooth 100 through the gap, thereby filling the entire internal gap of the accommodating cavity. As the excavation assembly is working, the powder will be squeezed and compacted, thereby affecting the monitoring effect of the sensor 111. Therefore, the protective shell 112 protrudes from the tail of the bucket tooth 100 in the direction close to the second connection position 201, thereby preventing sand and stone powder from entering the protective shell 112 through the gap, causing the sensor 111 to be damaged and ineffective.

[0047] Specifically, the protective shell 112 is made of super wear-resistant material. Super wear-resistant material can improve the wear resistance of the protective shell 112 in harsh working environments, reduce the wear caused by friction and collision, and extend the service life of the protective shell 112. Long-term wear resistance can ensure that the protective shell 112 always provides effective protection for the internal sensor 111, prevents the sensor 111 from external physical damage, effectively prevents the formation of plate agglomerates, improves monitoring accuracy, and increases the service life of the sensor 111. Specifically, super wear-resistant materials can be selected from solid non-Newtonian fluid composite materials, etc. In addition to having high wear resistance, they can also play a buffering role, which is not limited here.

[0048] Embodiment 2

[0049] An embodiment of the present invention also provides an excavator, which is equipped with the above-mentioned bucket tooth falling-off monitoring device. By configuring the bucket tooth falling-off monitoring device, the excavator can monitor the status of the bucket teeth 100 in real time, promptly detect the risk of bucket teeth 100 falling off, reduce unexpected downtime and maintenance time, and improve the operating efficiency of the excavator. Avoid the safety hazards caused by the sudden falling of the bucket teeth 100 during operation, and protect the safety of operators and the surrounding environment. In addition, it helps to maintain the normal operating state of the excavator, enhance the reliability and stability of the equipment, and reduce operation interruptions caused by faults. Monitoring and timely maintenance of the status of the bucket teeth 100 can reduce the adverse effects of bucket tooth 100 problems on other parts of the excavator and extend the service life of the excavator.

[0050] The above embodiments are only to illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may be subject to various changes and modifications, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A bucket tooth falling-off monitoring device, wherein a accommodating groove (101) is provided at the tail of the bucket tooth (100), and a head of a tooth holder (200) is inserted into the accommodating groove (101) and connected to the bucket tooth (100), characterized in that: The bucket tooth falling monitoring device comprises: A monitoring mechanism (10) comprises a monitoring component (11) and a magnet component (12); a first connection position (102) is arranged in the receiving groove (101); a second connection position (201) is arranged at the head of the tooth seat (200) opposite to the first connection position (102); one of the first connection position (102) and the second connection position (201) is provided with the monitoring component (11), and the other is provided with the magnet component (12); a distance between the monitoring component (11) and the magnet component (12) is a first distance value; the monitoring component (11) determines the first distance value by determining whether the change in the distance between the magnet component (12) and the monitoring component (11) causes a change in the oscillation amplitude of the LRC circuit of the monitoring component (11), thereby determining whether the bucket tooth (100) and the tooth seat (200) are detached; when the oscillation amplitude is higher than a threshold value, the monitoring component (11) generates a prompt message.

2. The bucket tooth falling monitoring device according to claim 1, characterized in that: The magnet assembly (12) is arranged at the second connection position (201); a positioning groove (202) is provided on the second connection position (201); and the magnet assembly (12) is snap-connected to the positioning groove (202).

3. The bucket tooth falling monitoring device according to claim 2, characterized in that: The magnet assembly (12) comprises a magnet unit (121), a shell (122) and a shell cover (123); the shell (122) is snap-fitted with the positioning groove (202); the shell cover (123) is used to open or close the shell (122); and the magnet unit (121) is arranged in the shell (122).

4. The bucket tooth falling monitoring device according to claim 3 is characterized in that: The magnet assembly (12) further comprises a buffer sleeve (124), wherein the buffer sleeve (124) is coated on the outer circumference of the magnet unit (121).

5. The bucket tooth falling monitoring device according to claim 3, characterized in that: The magnet unit (121) is configured as a permanent magnet.

6. The bucket tooth falling monitoring device according to claim 3, characterized in that: The inner wall of the shell (122) is provided with a magnetic conductive layer.

7. The bucket tooth falling monitoring device according to claim 1, characterized in that: The first connection position (102) is provided with a card slot (103), the monitoring component (11) comprises a sensor (111) and a protective shell (112), the protective shell (112) is snap-connected in the card slot (103), and the sensor (111) is arranged in the protective shell (112).

8. The bucket tooth falling monitoring device according to claim 7, characterized in that: The protective shell (112) protrudes from the tail of the bucket tooth (100) in a direction close to the second connection position (201).

9. The bucket tooth falling monitoring device according to claim 7, characterized in that: The protective shell (112) is made of super wear-resistant material.

10. An excavator, characterized in that: The bucket tooth falling monitoring device is provided with the bucket tooth falling monitoring device as described in any one of claims 1 to 9.

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