Over-torque protection device, cantilever rotation driving device of bucket wheel machine and bucket wheel machine

Abstract

The utility model relates to an over-torque protection device, a cantilever rotation driving device of a bucket wheel machine and the bucket wheel machine. The over-torque protection device comprises a first rotating body, a second rotating body, a transmission ball, an elastic pressing piece, a fan-shaped induction disc and a position sensor, and the first rotating body is in transmission connection with the second rotating body through the transmission ball; the elastic pressing piece is pressed on the transmission ball; the fan-shaped induction disc is connected to the elastic pressing piece in a sleeving mode and has a natural state and a pressed state, in the natural state, the position of the fan-shaped induction disc is kept fixed relative to the second rotating body, and in the pressed state, the transmission balls extrude the elastic pressing piece, so that the elastic pressing piece extrudes the fan-shaped induction disc to move relative to the second rotating body; the position sensor is used for detecting the position of the fan-shaped induction disc relative to the second rotating body. By means of the technical scheme, the over-torque protection device can reduce the possibility that the cantilever rotates under the working condition of large torque, and the safety of equipment operation is improved.

Description

Technical Field

[0001] This disclosure relates to the field of overload protection device technology, specifically to an over-torque protection device, a cantilever slewing drive device for a bucket wheel excavator, and the bucket wheel excavator itself. Background Technology

[0002] In related technologies, during the operation of bucket wheel excavators, due to the long cantilever, operators cannot directly and accurately observe the distance between the bucket wheel and the coal pile from the control room. This can easily lead to the bucket wheel plunging into the coal pile, causing the cantilever to rotate under high torque conditions, which poses certain safety hazards. Utility Model Content

[0003] The purpose of this disclosure is to provide an over-torque protection device, a cantilever slewing drive device for a bucket wheel excavator, and a bucket wheel excavator, so as to reduce the possibility of the cantilever slewing under conditions of large torque and improve the safety of equipment operation.

[0004] To achieve the above objectives, a first aspect of this disclosure provides an over-torque protection device for a cantilever slewing drive of a bucket wheel excavator, comprising: a first rotating body for connection to the output shaft of a motor of the cantilever slewing drive of the bucket wheel excavator; a second rotating body for connection to the input shaft of a slewing reducer of the cantilever slewing drive of the bucket wheel excavator; a transmission ball, wherein the first rotating body is connected to the second rotating body via the transmission ball; an elastic clamping member, which passes through the second rotating body along a first direction parallel to the rotation axis of the second rotating body and presses against the transmission ball; a fan-shaped sensing disk, which is sleeved on the end of the elastic clamping member away from the transmission ball and has a natural state and a compressed state, wherein in the natural state, the position of the fan-shaped sensing disk is fixed relative to the second rotating body, and in the compressed state, the transmission ball disengages from the first rotating body and presses against the elastic clamping member, such that the elastic clamping member presses the fan-shaped sensing disk to move relative to the second rotating body; and a position sensor for detecting the position of the fan-shaped sensing disk relative to the second rotating body.

[0005] Optionally, the elastic clamping member and the fan-shaped induction disk are arranged in multiple groups at equal intervals along the circumference of the second rotating body.

[0006] Optionally, the elastic clamping member and the fan-shaped induction disk are arranged in five groups at equal intervals along the circumference of the second rotating body.

[0007] Optionally, the thickness of the sector-shaped induction disk along the first direction is 1mm-2mm.

[0008] Optionally, the sector-shaped induction disk is an iron disk.

[0009] Optionally, the elastic clamping component includes a connecting screw, a helical spring, a washer, and a fastening nut. The second rotating body has a mounting hole that passes through the second rotating body along the first direction. The connecting screw passes through the fan-shaped induction disk and the washer in sequence along the first direction and is threaded to the mounting hole. The first end of the connecting screw located in the mounting hole is provided with the helical spring pressing against the transmission ball. The second end of the connecting screw, opposite to the first end, passes through the fan-shaped induction disk and is threaded to the fastening nut.

[0010] Optionally, a groove is provided on the outer wall surface of the first rotating body facing the second rotating body. In the natural state, the transmission ball is partially placed in the groove. In the compressed state, the transmission ball disengages from the groove and is pressed against the elastic clamping member.

[0011] Optionally, the grooves and the transmission balls are arranged at equal intervals along the circumference of the first rotating body.

[0012] The second aspect of this disclosure provides a cantilever slewing drive device for a bucket wheel excavator, including a motor, a slewing reducer, and the over-torque protection device provided in the first aspect above.

[0013] A third aspect of this disclosure provides a bucket wheel excavator, including the cantilever slewing drive device of the bucket wheel excavator provided in the second aspect above.

[0014] Through the above-described technical solution, namely the over-torque protection device provided in this disclosure, by inserting an elastic clamping member through the second rotating body in a first direction parallel to the rotation axis of the second rotating body and pressing it against the transmission balls, a stable transmission connection between the first and second rotating bodies can be ensured through the transmission balls. This enables the rotation of, for example, the cantilever slewing drive device of a bucket wheel excavator, thereby driving the cantilever movement. Furthermore, a fan-shaped induction disk is provided on the elastic clamping member. Thus, during the normal operation of, for example, the cantilever slewing drive device of a bucket wheel excavator, the fan-shaped induction disk can be kept in a natural state, that is, its position relative to the second rotating body can remain fixed. When the cantilever slewing drive of a bucket wheel excavator rotates under high torque conditions, the sector-shaped induction disk can be switched to a compressed state. That is, under high torque conditions, the over-torque of the cantilever slewing drive can be transmitted to the over-torque protection device, causing the transmission balls to disengage from the first rotating body and press against the elastic clamping member. This causes the elastic clamping member to compress and deform the sector-shaped induction disk relative to the second rotating body. When the position sensor detects the change in position of the sector-shaped induction disk relative to the second rotating body, it can output a signal feedback to realize safe operations such as shutdown and tripping of the equipment. This reduces the possibility of the cantilever rotating under high torque conditions and improves the safety of equipment operation.

[0015] In addition, since the induction disk has a fan-shaped structure, the overall structure is relatively simple and easy to install and manufacture. The fan-shaped induction disk structure also makes it easier to realize the movement and deformation of the cantilever rotary drive device relative to the second rotating body under the condition of large torque. The sensitivity of position change is high, which helps to improve the safety of equipment operation.

[0016] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the cantilever rotary drive device provided in an exemplary embodiment of this disclosure;

[0019] Figure 2 This is a schematic diagram of an over-torque protection device provided in an exemplary embodiment of this disclosure.

[0020] Description of Reference Numerals

[0021] 1-First rotating body; 110-Groove; 2-Motor; 210-Output shaft; 3-Second rotating body; 310-Mounting hole; 4-Rotary reducer; 410-Input shaft; 5-Transmission ball; 6-Elastic clamping element; 610-Connecting screw; 620-Helical spring; 630-Washer; 640-Fasting nut; 7-Fan-shaped sensing disk; 8-Position sensor. Detailed Implementation

[0022] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0023] In this disclosure, unless otherwise stated, "inner" and "outer" refer to the inner and outer contours relative to the outline of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0024] According to a first aspect of this disclosure, an over-torque protection device is provided, with reference to... Figure 1 and Figure 2As shown, the over-torque protection device includes a first rotating body 1, a second rotating body 3, transmission balls 5, an elastic clamping member 6, a sector-shaped induction disk 7, and a position sensor 8. The first rotating body 1 is connected to the output shaft 210 of the motor 2 of the cantilever slewing drive device of the bucket wheel excavator; the second rotating body 3 is connected to the input shaft 410 of the slewing reducer 4 of the cantilever slewing drive device of the bucket wheel excavator; the first rotating body 1 is connected to the second rotating body 3 via the transmission balls 5; the elastic clamping member 6 is positioned along a rotation axis parallel to the second rotating body 3. A second rotating body 3 is inserted through one direction and pressed against the transmission ball 5; a fan-shaped sensing disk 7 is sleeved on the end of the elastic clamping member 6 away from the transmission ball 5 and has a natural state and a pressed state. In the natural state, the position of the fan-shaped sensing disk 7 is fixed relative to the second rotating body 3. In the pressed state, the transmission ball 5 is disengaged from the first rotating body 1 and pressed against the elastic clamping member 6, so that the elastic clamping member 6 presses the fan-shaped sensing disk 7 to move relative to the second rotating body 3; a position sensor 8 is used to detect the position of the fan-shaped sensing disk 7 relative to the second rotating body 3.

[0025] Through the above technical solution, namely the over-torque protection device provided in this disclosure, by inserting the elastic clamping member 6 through the second rotating body 3 in a first direction parallel to the rotation axis of the second rotating body 3 and pressing it against the transmission ball 5, it is possible to ensure a stable transmission connection between the first rotating body 1 and the second rotating body 3 through the transmission ball 5, so as to realize the rotation of the cantilever slewing drive device of, for example, a bucket wheel machine, and thus drive the cantilever movement.

[0026] In addition, a fan-shaped induction disk 7 is provided on the elastic clamping member 6. During normal operation of the cantilever slewing drive device of a bucket wheel excavator, for example, the fan-shaped induction disk 7 can remain in its natural state, meaning its position relative to the second rotating body 3 remains fixed. However, when the cantilever slewing drive device of a bucket wheel excavator rotates under high torque conditions, the fan-shaped induction disk 7 can switch to a compressed state. That is, under high torque conditions, the excessive torque can be transmitted to the over-torque protection device, causing the transmission ball 5 to disengage from the first rotating body 1 and press against the elastic clamping member 6. This causes the elastic clamping member 6 to compress the fan-shaped induction disk 7, causing it to move and deform relative to the second rotating body 3. When the position sensor 8 detects the change in position of the fan-shaped induction disk 7 relative to the second rotating body 3, it can output a feedback signal to enable safe operations such as shutdown and tripping of the equipment. This reduces the possibility of the cantilever rotating under high torque conditions and improves the safety of equipment operation.

[0027] In addition, since the induction disk has a fan-shaped structure, the overall structure is relatively simple and easy to install and manufacture. The fan-shaped induction disk structure also makes it easier to realize the movement and deformation of the cantilever rotary drive device relative to the second rotating body 3 under the condition of large torque. The sensitivity of position change is high, which helps to improve the safety of equipment operation.

[0028] In this disclosure, the specific external shape and structure of the first rotating body 1 and the second rotating body 3 are not specifically limited. Those skilled in the art can design them adaptively according to actual application needs. The purpose is to ensure that the first rotating body 1 of the over-torque protection device is stably connected to the output shaft 210 of the motor 2 of the cantilever slewing drive device of the bucket wheel machine, and that the second rotating body 3 of the over-torque protection device is stably connected to the input shaft 410 of the slewing reducer 4 of the cantilever slewing drive device of the bucket wheel machine, so as to realize the slewing of the cantilever slewing drive device of the bucket wheel machine.

[0029] It should be noted that during the normal rotation of the cantilever slewing drive device of the bucket wheel excavator, the output shaft 210 of the motor 2 can drive the first rotating body 1, the second rotating body 3, and the input shaft 410 of the slewing reducer 4 to rotate synchronously. However, when, for example, the bucket wheel is embedded in the coal pile, causing the cantilever to rotate under a large torque condition, the over-torque of the cantilever slewing drive device under the large torque condition can be transmitted to the over-torque protection device through the input shaft 410 of the slewing reducer 4. This causes the transmission ball 5 to disengage from the first rotating body 1 and be pressed against the elastic clamping member 6, so that the elastic clamping member 6 presses the fan-shaped induction disk 7 to move and deform relative to the second rotating body 3. Thus, when the position sensor 8 detects the change in position of the fan-shaped induction disk 7 relative to the second rotating body 3, it can output a signal feedback to realize safe operations such as shutdown and tripping of the equipment, thereby improving the safety of equipment operation.

[0030] In addition, it should be noted that the movement and deformation of the aforementioned sector-shaped sensing disk 7 relative to the second rotating body 3 can be, for example, linear movement of the sector-shaped sensing disk 7 relative to the second rotating body 3 along the first direction, or, for example, twisting and deformation of the sector-shaped sensing disk 7 relative to the second rotating body 3 due to rotational inertia. Both of these movement and deformation of the sector-shaped sensing disk 7 relative to the second rotating body 3 can be detected by the position sensor 8 and output a signal feedback to realize safe operations of the equipment, such as shutdown and tripping, thereby improving the safety of equipment operation.

[0031] In some implementations, reference Figure 1 and Figure 2As shown, the elastic clamping element 6 and the fan-shaped induction disk 7 can be arranged in multiple groups at equal intervals along the circumference of the second rotating body 3. In this way, during the synchronous rotation of the first rotating body 1 and the second rotating body 3 driven by the output shaft 210 of the motor 2, the movement and deformation of any one of the fan-shaped induction disks 7 on the second rotating body 3 relative to the second rotating body 3 can be detected by the position sensor 8, which further improves the detection sensitivity of the over-torque protection device and helps to improve the safety of equipment operation.

[0032] Since the second rotating body 3 is usually provided with five elastic clamping parts 6, in order to facilitate the optimization and modification of the on-site equipment, for example, in some embodiments, the elastic clamping parts 6 and the fan-shaped induction disk 7 can be arranged in five groups at equal intervals along the circumference of the second rotating body 3, so that the on-site installers can directly install the fan-shaped induction disk 7 on the existing five elastic clamping parts 6, which facilitates on-site optimization and improvement and reduces costs.

[0033] Additionally, in some implementations, references Figure 2 As shown, along the first direction, the thickness of the sector-shaped induction disk 7 can be 1mm-2mm. Its structure is relatively simple, easy to install and manufacture, and its overall weight is light, without affecting the transmission efficiency between the motor 2 and the rotary reducer 4. Of course, the specific embodiment of the thickness of the sector-shaped induction disk 7 described above is exemplary, and this disclosure is not limited thereto. Those skilled in the art can adaptively design the thickness of the sector-shaped induction disk 7 according to actual application requirements.

[0034] Furthermore, in some embodiments, the sector-shaped induction disk 7 can be, for example, an iron disk, which has high structural strength and helps ensure a long service life. Of course, in some alternative embodiments, the above-mentioned sector-shaped induction disk 7 can also be, for example, a stainless steel disk. This disclosure is not limited thereto, and those skilled in the art can design it adaptively according to actual application requirements.

[0035] In some implementations, reference Figure 1 and Figure 2As shown, the elastic clamping component 6 may include a connecting screw 610, a helical spring 620, a washer 630, and a fastening nut 640. The second rotating body 3 has a mounting hole 310 that passes through the second rotating body 3 in a first direction. The connecting screw 610 passes through the sector-shaped induction disk 7 and the washer 630 in sequence along the first direction and is then threaded into the mounting hole 310. The first end of the connecting screw 610 located in the mounting hole 310 is provided with a helical spring 620 pressing against the transmission ball 5. The second end of the connecting screw 610, opposite to the first end, passes through the sector-shaped induction disk 7 and is then threaded into the fastening nut 640. In this way, the above arrangement can stably connect the sector-shaped induction disk 7 to the second rotating body 3 with high reliability, so as to facilitate... Driven by the output shaft 210 of motor 2, the first rotating body 1, the second rotating body 3, the sector-shaped induction disk 7, and the input shaft 410 of rotary reducer 4 rotate synchronously. When the cantilever rotary drive device is under a large torque condition, and the excessive torque is transmitted to the over-torque protection device, the transmission ball 5 can be disengaged from the first rotating body 1 and pressed against the helical spring 620. At the same time, the helical spring 620 is pressed against the connecting screw 610, which can cause the connecting screw 610 to press against the sector-shaped induction disk 7 and cause the sector-shaped induction disk 7 to move relative to the second rotating body 3. When the sector-shaped induction disk 7 moves and deforms relative to the second rotating body 3, it can be detected by the position sensor 8 to perform safety operations such as shutdown and tripping of the equipment.

[0036] Additionally, in some implementations, references Figure 1 and Figure 2 As shown, a groove 110 can be provided on the outer wall surface of the first rotating body 1 facing the second rotating body 3. Thus, when the sector-shaped sensing disk 7 is in its natural state, the transmission ball 5 is partially placed within the groove 110, ensuring high reliability. Furthermore, the static friction between the transmission ball 5 and the groove 110 on the first rotating body 1 improves the transmission reliability between the first rotating body 1 and the second rotating body 3. When the sector-shaped sensing disk 7 is under pressure, the transmission ball 5 can disengage from the groove 110 and be pressed against the elastic clamping member 6. This elastic clamping member 6 then compresses and deforms the sector-shaped sensing disk 7 relative to the second rotating body 3, facilitating detection by the position sensor 8.

[0037] Optionally, in some embodiments, the grooves 110 and the transmission balls 5 can be arranged in multiple equal intervals along the circumference of the first rotating body 1 in order to improve the transmission reliability between the first rotating body 1 and the second rotating body 3.

[0038] For example, the position sensor 8 can be any known position sensor in the art, such as a proximity switch or a laser rangefinder, capable of detecting the movement and deformation of the sector-shaped induction disk 7 relative to the second rotating body 3. The position sensor can also provide output signal feedback to enable safe operations such as shutdown and tripping of the equipment. This disclosure does not specifically limit its application. Furthermore, the position sensor 8 can be installed on the ground or on the housing of the rotary reducer 4, its purpose being simply to detect the movement and deformation of the sector-shaped induction disk 7 relative to the second rotating body 3.

[0039] According to a second aspect of this disclosure, a cantilever slewing drive device for a bucket wheel excavator is provided. This device includes a motor 2, a slewing reducer 4, and the over-torque protection device provided in the first aspect, thereby reducing the likelihood of the cantilever slewing under high torque conditions and improving equipment operational safety. Furthermore, this cantilever slewing drive device also possesses all the beneficial effects of the over-torque protection device provided in the first aspect, which will not be elaborated upon here.

[0040] According to a third aspect of this disclosure, a bucket wheel excavator is provided, which includes the cantilever slewing drive device of the bucket wheel excavator provided in the second aspect above. Furthermore, this bucket wheel excavator also possesses all the beneficial effects of the cantilever slewing drive device of the bucket wheel excavator provided in the second aspect above, which will not be elaborated further herein.

[0041] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0042] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0043] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. An over-torque protection device for the cantilever slewing drive device of a bucket wheel excavator, characterized in that, include: The first rotating body is used to connect to the output shaft of the motor of the cantilever slewing drive device of the bucket wheel excavator; The second rotating body is used to connect to the input shaft of the slewing reducer of the cantilever slewing drive device of the bucket wheel excavator; The first rotating body is connected to the second rotating body via the transmission ball bearing; An elastic clamping member passes through the second rotating body along a first direction parallel to the rotation axis of the second rotating body and presses against the transmission balls; A fan-shaped sensing disk is sleeved on the end of the elastic clamping member away from the transmission ball and has a natural state and a compressed state. In the natural state, the position of the fan-shaped sensing disk is fixed relative to the second rotating body. In the compressed state, the transmission ball is disengaged from the first rotating body and pressed against the elastic clamping member, so that the elastic clamping member presses the fan-shaped sensing disk to move relative to the second rotating body. as well as A position sensor is used to detect the position of the sector-shaped induction disk relative to the second rotating body.

2. The over-torque protection device according to claim 1, characterized in that, The elastic clamping element and the fan-shaped induction disk are arranged in multiple groups at equal intervals along the circumference of the second rotating body.

3. The over-torque protection device according to claim 2, characterized in that, The elastic clamping element and the fan-shaped induction disk are arranged in five groups at equal intervals along the circumference of the second rotating body.

4. The over-torque protection device according to claim 1, characterized in that, Along the first direction, the thickness of the fan-shaped induction disk is 1mm-2mm.

5. The over-torque protection device according to claim 1, characterized in that, The sector-shaped induction disk is an iron disk.

6. The over-torque protection device according to any one of claims 1-5, characterized in that, The elastic clamping component includes a connecting screw, a helical spring, a washer, and a fastening nut. The second rotating body has a mounting hole that passes through the second rotating body along the first direction. The connecting screw passes through the fan-shaped induction disk and the washer in sequence along the first direction and is threaded to the mounting hole. The first end of the connecting screw located in the mounting hole is provided with the helical spring pressing against the transmission ball. The second end of the connecting screw, opposite to the first end, passes through the fan-shaped induction disk and is threaded to the fastening nut.

7. The over-torque protection device according to claim 6, characterized in that, The first rotating body has a groove on its outer wall facing the second rotating body. In its natural state, the transmission ball is placed in the groove. In the compressed state, the transmission ball disengages from the groove and is pressed against the elastic clamping member.

8. The over-torque protection device according to claim 7, characterized in that, The grooves and the transmission balls are arranged at equal intervals along the circumference of the first rotating body.

9. A cantilever slewing drive device for a bucket wheel excavator, characterized in that, It includes a motor, a rotary reducer, and the over-torque protection device as described in any one of claims 1-8.

10. A bucket wheel excavator, characterized in that, Includes the cantilever slewing drive device of the bucket wheel excavator as described in claim 9.

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