Protection device for motor dragging system

Abstract

The utility model relates to the technical field of wind turbine generator transmission chain testing, and discloses a protection device used for a motor dragging system, comprising a first connecting piece, one end of which is connected with a hydraulic device and a bearing cross beam, so that the hydraulic device can push the first connecting piece and the bearing cross beam to move synchronously; the first connecting piece penetrates through the base and is connected with the limiting piece, the limiting piece and the first connecting piece synchronously move, and the limiting piece is far away from or close to the base in the moving process; the first triggering piece is installed on the base, the second triggering piece is installed on the limiting piece, the first triggering piece and the second triggering piece are in communication connection with the hydraulic device, and when the limiting piece and the base get close to each other, the first triggering piece makes contact with the second triggering piece, and the hydraulic device stops. Through the design of the first triggering piece and the second triggering piece, more serious equipment damage or safety accidents are avoided, and the safety of personnel is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine transmission chain testing technology, and in particular to a protection device for motor drive systems. Background Technology

[0002] In the wind turbine drivetrain testing system, since the wind turbine test needs to simulate the angle requirements of the wind turbine in the actual environment, the drive motor of the wind turbine drivetrain needs to meet different wind turbine elevation angle conditions of (6-10)°. The motor drive system, which adjusts the angle of the drive motor, also needs to change with the angle of the drive motor. The motor drive system consists of four hydraulic cylinders, all mounted on the same supporting crossbeam. The piston rods of the four hydraulic cylinders are connected to the supporting crossbeam, and the angle adjustment of the drive motor is achieved through the extension, retraction, and rotation of the four hydraulic cylinders.

[0003] However, if the hydraulic cylinder suddenly loses pressure, the drive motor, the load-bearing beam connected to the drive motor, and the hydraulic system may fall, and because the drive motor, load-bearing beam, and hydraulic system are quite heavy, the impact force when they fall would be significant, easily damaging the testing equipment and causing cost waste; moreover, it would increase the safety risks for maintenance personnel during repairs. Utility Model Content

[0004] The purpose of this invention is to provide a protective device for motor drive systems to solve the problem of increased safety risks caused by the collapse of hydraulic cylinders due to pressure loss.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A protective device for a motor drive system, the motor drive system including a support beam, a hydraulic device and a drive motor, the hydraulic device passing through the support beam and connected to the drive motor, the drive motor being mounted on the support beam;

[0007] The protective device is characterized by comprising: a first connecting member, one end of which is connected to the hydraulic device and the load-bearing beam, so that the hydraulic device can drive the first connecting member and the load-bearing beam to move synchronously; a limiting member and a base, the other end of which passes through the base and is connected to the limiting member, the limiting member and the first connecting member moving synchronously, the limiting member moving away from or towards the base during the movement; a first trigger and a second trigger, the first trigger mounted on the base, the second trigger mounted on the limiting member, and the first trigger and the second trigger respectively communicating with the hydraulic device, wherein when the limiting member and the base approach each other, the first trigger and the second trigger contact each other, and the hydraulic device stops.

[0008] Based on the aforementioned technical features, the first trigger is mounted on the base, and the second trigger is mounted on the limiting member, both of which are communicatively connected to the hydraulic device. When the hydraulic device loses pressure, causing the drive motor to fall, it will drive the first connecting member downwards. The limiting member, driven by the first connecting member, will move downwards and approach the base, causing the first and second triggers to come into contact. This stops the hydraulic device from operating, effectively preventing serious equipment damage due to abnormal operation, eliminating safety accidents, and ensuring personnel safety. Simultaneously, if the hydraulic device falls due to pressure loss, the limiting member can act as a buffer, greatly reducing the impact force and preventing excessive damage to the hydraulic device, significantly reducing potential maintenance and replacement costs, and effectively avoiding resource waste. When the two components move away from each other, the hydraulic device operates normally, ensuring the normal working state of the system and achieving effective control and protection of the hydraulic device's operating status.

[0009] Furthermore, it also includes a drive assembly; a gap is formed between the limiting member and the base to buffer the impact force when the drive motor falls; the drive assembly is connected to the limiting member, and the drive assembly can drive the limiting member away from or towards the base to maintain the gap.

[0010] Based on the above technical features, by driving the limiting component to move, the gap can be flexibly adjusted according to the actual situation to ensure that the buffering effect reaches the best state, thereby improving the adaptability and flexibility of the protection device.

[0011] Meanwhile, the limiting component is installed on the first connecting component and forms a gap with the base. When the drive motor falls, this gap can act as a buffer to reduce the impact force generated when the drive motor falls. This helps to protect the drive motor itself and other components connected to it, reduce the risk of damage caused by excessive impact force, extend the service life of the equipment, and further improve the effective control and protection of the hydraulic device's operating status.

[0012] Furthermore, it also includes a detection component, which is mounted on the base and is used to detect the size of the gap between the limiting member and the base.

[0013] Based on the above technical features, by detecting and automatically adjusting the gap in real time, it can be ensured that the drive motor receives appropriate buffer protection under any working condition, thereby effectively absorbing and buffering the impact force when the drive motor falls, further improving the stability and reliability of the motor drive system, and minimizing the safety risks that the drive motor may cause when it falls.

[0014] Furthermore, the limiting member includes a protective nut, which is connected to the driving assembly; the first connecting member is a lead screw, and the protective nut is threadedly connected to the lead screw. The driving device can drive the protective nut to rotate on the lead screw, so that the protective nut moves away from or closer to the base, thereby maintaining the gap.

[0015] Based on the above technical features, the threaded structure of the lead screw, in conjunction with the protective nut, can achieve precise linear displacement control during rotation, thereby accurately adjusting the gap between the limiting component and the base, and ensuring that the gap is within a certain range, thus ensuring the normal operation and stable performance of the equipment.

[0016] Furthermore, the limiting component also includes a guide seat, which is sleeved on the outer periphery of the protective nut and the outer periphery of the driven gear, and the guide seat rotates synchronously with the protective nut and the driven gear.

[0017] Based on the above technical features, the guide seat is sleeved on the protective nut, providing guidance and support for the rotation and movement of the protective nut. This helps to ensure the stability of the protective nut during movement, prevents it from shaking or deviating, and thus ensures the working reliability of the entire limiting component.

[0018] Furthermore, the limiting component also includes a driven gear, the driving assembly includes a driving gear, the driven gear is fixed to and coaxially connected to the protective nut, and the driven gear and the driving gear mesh with each other.

[0019] Based on the above technical features, the transmission method in which the driving gear and the driven gear mesh can efficiently transmit the power of the drive component to the limiting component, which can ensure that the drive component drives the protective nut accurately and stably, thereby making the movement of the limiting component more precise and controllable, and ensuring the accuracy and reliability of the buffer protection for the drive motor.

[0020] Furthermore, the drive assembly also includes a motor, which is mounted on the guide seat and connected to the drive gear to drive the drive gear to rotate, thereby driving the driven gear to rotate.

[0021] Based on the above technical features, the motor is directly connected to the driving gear, which can efficiently and accurately transmit the motor's power to the driving gear, thereby driving the driven gear to rotate. This reduces intermediate links in the power transmission process, reduces energy loss and transmission errors, improves transmission efficiency and accuracy, and ensures that the limit component can move accurately as expected, thus achieving precise protection and control of the driven motor.

[0022] Furthermore, the base includes a rotating assembly and a base, the rotating assembly being rotatably connected to the base, the first connecting member passing through the base, and the rotating assembly being connected to the limiting member to cooperate with the angle adjustment of the hydraulic device.

[0023] Based on the above technical features, the structure can maintain stability during angle adjustment through the coordinated operation of the base, rotating component, first connecting component and limiting component, ensuring that the equipment can work reliably at different angles and reducing the shaking or instability that may be caused by angle changes.

[0024] Furthermore, the rotating assembly includes a body and two bearings. The two bearings are respectively connected to opposite sides of the body and are rotatably connected to the base. The first connecting member passes through the base and the body and is connected to the limiting member to cooperate with the angle adjustment of the hydraulic device.

[0025] Based on the aforementioned technical features, the rotating assembly is rotatably connected to the base via two bearings, which greatly enhances the mobility of the equipment. The main body can rotate smoothly with the help of the bearings, allowing the connected drive motor and other related components to easily switch between different angles, saving operating time and labor costs, and improving work efficiency.

[0026] Furthermore, it also includes a pad, which is mounted on the body, and the first connector passes through the pad and connects to the limiting member to protect the rotating assembly.

[0027] Based on the above technical features, the pad can act as a buffer between the first connector and the rotating component, reducing the direct impact of the first connector on the rotating component, preventing the rotating component from being worn, deformed, or even damaged due to excessive impact force, thereby extending the service life of the rotating component.

[0028] The beneficial effects achieved by this utility model are:

[0029] This invention features a first trigger mounted on a base and a second trigger mounted on a limiting member, both of which are communicatively connected to the hydraulic system. When the hydraulic system loses pressure, causing the drive motor to fall, it pulls the first connecting member downwards. The limiting member, driven by the first connecting member, moves downwards and approaches the base, causing the first and second triggers to contact each other. This stops the hydraulic system, effectively preventing serious equipment damage due to abnormal operation, eliminating safety accidents, and ensuring personnel safety. Simultaneously, if the hydraulic system falls due to pressure loss, the limiting member acts as a buffer, greatly reducing the impact force and preventing excessive damage to the hydraulic system, significantly reducing potential maintenance and replacement costs, and effectively avoiding resource waste. When the two components move away from each other, the hydraulic system operates normally, ensuring the system's normal operating status and achieving effective control and protection of the hydraulic system's operating status. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the rotating assembly and the limiting component of this utility model;

[0032] Figure 3 This is a cross-sectional view of the limiting component of this utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the pad block of this utility model;

[0034] Wherein, 1-first connecting member;

[0035] 2-Limiting component; 21-Protective nut; 22-Driven gear; 23-Guide seat;

[0036] 3-Base; 31-Rotating assembly; 311-Body; 312-Bearing; 32-Staple;

[0037] 4-First trigger;

[0038] 5-Second trigger;

[0039] 6-Drive assembly; 61-Drive gear; 62-Motor;

[0040] 7-Detection components;

[0041] 8-Place block.

[0042] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The same or similar reference numerals correspond to the same or similar components. The terms describing positional relationships in the drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and technical features in the embodiments of this application can be combined with each other, and the detailed descriptions in the specific embodiments should be understood as explanations of the purpose of this application and should not be regarded as undue limitations on this application.

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the specific technical solutions of this application will be further described in detail below with reference to the accompanying drawings of the embodiments of this application. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application.

[0045] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more.

[0046] In the embodiments of this application, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium.

[0047] In embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0048] The technical solution of this embodiment will be described in detail below with reference to the accompanying drawings.

[0049] like Figure 1As shown, this embodiment proposes a protection device for a motor drive system. The motor drive system includes a load-bearing crossbeam, a hydraulic device, and a drive motor. The hydraulic device passes through the load-bearing crossbeam and is connected to the drive motor. The drive motor is mounted on the load-bearing crossbeam.

[0050] The protective device includes: a first connector 1, one end of which is connected to a hydraulic device and a load-bearing beam, so that the hydraulic device can drive the first connector 1 and the load-bearing beam to move synchronously; a limiting member 2 and a base 3, the other end of which passes through the base 3 and is connected to the limiting member 2, the limiting member 2 and the first connector 1 move synchronously, and the limiting member 2 moves away from or closer to the base 3 during the movement; a first trigger 4 and a second trigger 5, the first trigger 4 is mounted on the base 3, the second trigger 5 is mounted on the limiting member 2, and the first trigger 4 and the second trigger 5 are respectively connected to the hydraulic device in communication. When the limiting member 2 and the base 3 approach each other, the first trigger 4 and the second trigger 5 come into contact, and the hydraulic device stops.

[0051] The specific steps for using the protection device designed above are as follows:

[0052] 1. Initial state: Before system startup, the limiting component 2 is installed on the first connecting component 1. The first connecting component 1 passes through the base 3 and is connected to the piston rod of the hydraulic device, and the load-bearing crossbeam is also installed on the piston rod. The first trigger component 4 is installed on the base 3, and the second trigger component 5 is installed on the limiting component 2. The two are far apart from each other, and the hydraulic device is in standby state.

[0053] 2. Normal Operation: When the motor drive system is started, the hydraulic device begins to work. The piston rod of the hydraulic device pushes the load-bearing crossbeam to move, which in turn moves the drive motor on the load-bearing crossbeam. At this time, the drive motor moves along a predetermined trajectory and speed. The limiting member 2 moves with the first connecting member 1, maintaining a preset gap with the base 3. The first trigger member 4 and the second trigger member 5 move away from each other, and the hydraulic device continues to operate normally.

[0054] 3. Abnormal situation: If the drive motor falls due to malfunction or other reasons, the drive motor will drive the first connecting piece 1 to move quickly, and the limiting piece 2 will also move closer to the base 3. When the limiting piece 2 moves closer to the base 3 to a certain extent, the second trigger piece 5 installed on the limiting piece 2 and the first trigger piece 4 installed on the base 3 will move closer to each other and make contact.

[0055] 4. Protection action: After the first trigger 4 and the second trigger 5 come into contact, a signal is immediately sent to the hydraulic device. Upon receiving the signal, the hydraulic device stops operating, thereby preventing the driven motor from continuing to fall and causing more serious damage, thus playing a role in protecting the system.

[0056] 5. Resumption of Operation: After troubleshooting, move the limiter 2 away from the base 3, and separate the first trigger 4 and the second trigger 5 from each other. The hydraulic device will resume normal operation, and the drive motor can continue to carry out testing.

[0057] The first trigger 4 is mounted on the base 3, and the second trigger 5 is mounted on the limiting member 2, both of which are communicatively connected to the hydraulic device. When the hydraulic device loses pressure, causing the drive motor to fall, it will drive the first connecting member 1 to move downwards. The limiting member 2, driven by the first connecting member 1, moves downwards and approaches the base 3. When the first trigger 4 and the second trigger 5 approach and contact each other, the hydraulic device stops operating, effectively preventing serious equipment damage caused by abnormal operation, eliminating safety accidents, and ensuring personnel safety. At the same time, if the hydraulic device falls due to pressure loss, the limiting member can play a buffering role, greatly reducing the impact force of the fall, preventing excessive damage to the hydraulic device, significantly reducing potential maintenance and replacement costs, and effectively avoiding resource waste. When the two are far apart, the hydraulic device operates normally, ensuring the normal working state of the system, and achieving effective control and protection of the hydraulic device's operating status.

[0058] like Figure 1 and Figure 2 As shown, in this embodiment, a drive assembly 6 is also included; a gap is formed between the limiting member 2 and the base 3 to buffer the impact force when the drag motor falls; the drive assembly 6 is connected to the limiting member 2 to drive the limiting member 2 to move away from or closer to the base 3 in order to maintain the gap.

[0059] Preferably, the gap between the limiting member 2 and the base 3 is 3mm.

[0060] The movement of the limiting member 2 is driven by the drive component 6, allowing for flexible adjustment of the gap according to actual conditions to ensure optimal buffering effect and improve the adaptability and flexibility of the protection device. Simultaneously, the limiting member 2, installed on the first connecting member 1 and forming a gap with the base 3, acts as a buffer when the drive motor falls, reducing the impact force generated during the fall. This helps protect the drive motor itself and other connected components, reducing the risk of damage due to excessive impact, extending the equipment's service life, and further improving the effective control and protection of the hydraulic device's operating status.

[0061] like Figure 1 and Figure 2 As shown, in this embodiment, a detection component 7 is also included. The detection component 7 is installed on the base 3 and is used to detect the size of the gap between the limiting member 2 and the base 3.

[0062] Preferably, the detection component 6 described above uses a displacement sensor for detection.

[0063] To achieve an automatic effect, this embodiment also includes a control component, which can receive the gap size signal detected by the displacement sensor and transmit the signal to the drive component 6, so that the drive component 6 drives the limiting member 2 to move away from or closer to the base 3 to maintain the gap.

[0064] By detecting and automatically adjusting the clearance in real time, the drive motor can be properly buffered and protected under any working condition, thereby effectively absorbing and buffering the impact force when the drive motor falls, further improving the stability and reliability of the motor drive system, and minimizing the safety risks that the drive motor may cause when it falls.

[0065] like Figure 3 As shown, in this embodiment, the limiting member 2 includes a protective nut 21, which is connected to the driving component 6; the first connecting member 1 is a lead screw, and the protective nut 21 is threadedly connected to the lead screw. The driving device 5 can drive the protective nut 21 to rotate on the lead screw so that the protective nut 21 moves away from or closer to the base 3, thereby maintaining the gap.

[0066] The threaded structure of the lead screw, in conjunction with the protective nut 21, enables precise linear displacement control during rotation, thereby accurately adjusting the gap between the limiting component 2 and the base 3 and ensuring that the gap is within a certain range, thus ensuring the normal operation and stable performance of the equipment.

[0067] like Figure 3 As shown, in this embodiment, the limiting member 2 also includes a driven gear 22, and the driving component 6 includes a driving gear 61. The driven gear 22 is fixed to the protective nut 21 and coaxially connected. The driven gear 22 and the driving gear 61 mesh with each other.

[0068] The transmission method in which the driving gear 61 meshes with the driven gear 22 can efficiently transmit the power of the driving component 6 to the limiting component 2, ensuring that the driving component 6 drives the protective nut 21 accurately and stably, thereby making the movement of the limiting component 2 more precise and controllable, and ensuring the accuracy and reliability of the buffer protection for the drive motor.

[0069] like Figure 3 As shown, in this embodiment, the limiting member 2 further includes a guide seat 23, which is sleeved on the outer periphery of the protective nut 21 and the outer periphery of the driven gear 22. The guide seat 23 rotates synchronously with the protective nut 21 and the driven gear 22. The guide seat 23, sleeved on the protective nut 21, provides guidance and support for the rotation and movement of the protective nut 21, helping to ensure the stability of the protective nut 21 during movement, preventing it from shaking or shifting, and thus ensuring the working reliability of the entire limiting member 2.

[0070] Preferably, the limiting member 2 also includes a bearing, and the guide seat 23 is connected to the protective nut 21 through the bearing, so that the movement between the guide seat and the protective nut becomes more stable and smooth.

[0071] like Figure 3 As shown, in this embodiment, the drive assembly 6 also includes a motor 62, which is mounted on the guide seat 23. The motor 62 is connected to the drive gear 61 to drive the drive gear 61 to rotate, thereby driving the driven gear 22 to rotate.

[0072] The motor 62 is directly connected to the drive gear 61, which can efficiently and accurately transmit the power of the motor 62 to the drive gear 61, thereby driving the driven gear 22 to rotate. This reduces intermediate links in the power transmission process, reduces energy loss and transmission error, improves transmission efficiency and accuracy, and ensures that the limit member 2 can move accurately as expected, thereby achieving precise protection and control of the drive motor.

[0073] like Figure 1 As shown, in this embodiment, the base 3 includes a rotating assembly 31 and a base 32. The rotating assembly 31 is rotatably connected to the base 32. The first connecting member 1 passes through the base 32 and the rotating assembly 31 and is connected to the limiting member 2 to cooperate with the angle adjustment of the hydraulic device.

[0074] Through the coordinated operation of the base 32, rotating component 31, first connecting member 1 and limiting member 2, the stability of the structure can be maintained during the angle adjustment process, ensuring that the equipment can work reliably at different angles and reducing the shaking or instability that may be caused by angle changes.

[0075] like Figure 3 As shown, in this embodiment, the rotating assembly 31 includes a body 311 and two bearings 312. The two bearings 312 are respectively connected to opposite sides of the body 311. The two bearings 312 are rotatably connected to the base 32. The first connecting member 1 passes through the base 32 and the body 311 and is connected to the limiting member 2 to cooperate with the angle adjustment of the hydraulic device.

[0076] The rotating assembly is rotatably connected to the base 3 via two bearings, which greatly improves the mobility of the equipment. The main body can rotate smoothly with the help of the bearings, allowing the connected drive motor and other related components to easily switch between different angles, saving operation time and labor costs, and improving work efficiency.

[0077] like Figure 4As shown, this embodiment also includes a pad 8, which is mounted on the body 311. The first connector 1 passes through the pad 8 and connects to the limiting member 2 to protect the rotating assembly 31. The pad 8 can act as a buffer between the first connector 1 and the rotating assembly 31, reducing the direct impact of the first connector 1 on the rotating assembly 31, and preventing the rotating assembly 31 from being worn, deformed, or even damaged due to excessive impact force, thereby extending the service life of the rotating assembly 31.

[0078] In summary, as Figures 1-4 As shown, the working principle of this utility model is as follows: the rotating component 31 is connected to the base 3 via the base, thus providing support; the piston rod of the hydraulic device of the motor-driven system is connected to one end of the first connecting member 1 of the protection device. The first connecting member 1 of the protection device moves together with the extension and retraction of the hydraulic cylinder piston rod. At the same time, since the first connecting member 1 is a lead screw, and the protection nut 21 is installed on the lead screw, the lead screw also drives the protection nut 21 to move up and down. To provide protection, a gap is formed between the protection nut 21 and the rotating component 3, which provides support. The displacement sensor monitors the size of the gap between the protection nut 21 and the rotating component 31 in real time. When the motor-driven system adjusts the angle, the relative position of the protection nut 4 with respect to the rotating component 3 changes. The displacement sensor detects the displacement signal and transmits the signal to the motor 62 in the drive component 6, causing it to drive the protection nut 21 to rotate around the first connecting member 1 and adjust its position, so that the distance between the protection nut 21 and the rotating component 3 is always kept within the gap size, thus providing a fall-prevention buffer.

[0079] When the distance between the protective nut 21 and the rotating assembly 31 exceeds the clearance size, the displacement sensor will detect an over-limit signal and transmit the signal to the four hydraulic devices and the motor 62. The four hydraulic devices will stop operating simultaneously, and the motor 62 will drive the lead screw to rotate, thereby adjusting the distance between the protective nut 21 and the rotating assembly 31. Only when the distance between the protective nut 21 and the rotating assembly 31 is adjusted to the appropriate clearance size can the four hydraulic devices resume operation.

[0080] When the hydraulic device loses pressure, causing the motor-driven system to fall, the first connecting member 1 moves rapidly, and the limiting member 2 also moves closer to the base 3. At this time, the first trigger member 4 will contact the second trigger member 5, outputting a fault signal. The hydraulic device in the motor-driven system will immediately stop running. It can be manually restored after the fault is cleared. When the motor 62 in the drive assembly 6 stops due to a fault, the limiting member 2 will not rotate around the first connecting member 1. Therefore, when the hydraulic device drives the first connecting member 1 to move up and down, the limiting member 2 will move closer to or away from the base 3. The second trigger member 5 installed on the limiting member 2 and the first trigger member 4 installed on the base 3 will also move closer to each other and contact each other, causing the hydraulic device to stop. It can be manually restored after the fault is cleared.

[0081] The protective nut 21 is fixedly connected to the driven gear 22, which meshes with the driving gear 61. The driving gear 61 is connected to the motor 62, so that the motor 62 drives the driving gear 61 to rotate, thereby driving the driven gear 22 to rotate. The motor 62 is mounted on the guide seat 23. When the motor 62 rotates, the protective nut 21 will rotate, thereby driving the limiting member 2 to move up and down. Since the drive assembly 6 is mounted on the guide seat 23, the drive assembly 6 will also move up and down with the limiting member 2, thereby ensuring that the driven gear 22 and the driving gear 61 are always in a meshed state, so as to maintain the gap between the limiting member 2 and the base 3.

[0082] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made based on the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A protection device for a motor driving system, the motor driving system comprising a load-bearing beam, a hydraulic device and a driving motor, the hydraulic device being connected with the driving motor through the load-bearing beam, and the driving motor being installed on the load-bearing beam; the protection device comprising: a first connecting member (1) having one end connected with the hydraulic device and the load-bearing beam so that the hydraulic device can push the first connecting member (1) and the load-bearing beam to move synchronously; a limiting member (2) and a base (3), the other end of the first connecting member (1) being connected with the limiting member (2) through the base (3), the limiting member (2) and the first connecting member (1) moving synchronously, the limiting member (2) moving away from or approaching the base (3) during the movement; a first trigger member (4) and a second trigger member (5), the first trigger member (4) being installed on the base (3), the second trigger member (5) being installed on the limiting member (2), and the first trigger member (4) and the second trigger member (5) being respectively connected in communication with the hydraulic device, when the limiting member (2) and the base (3) approach each other, the first trigger member (4) and the second trigger member (5) are in contact, and the hydraulic device stops. Further comprising a driving assembly (6), a gap being formed between the limiting member (2) and the base (3) to buffer the impact force when the driving motor falls; the driving assembly (6) being connected with the limiting member (2), the driving assembly (6) being capable of driving the limiting member (2) to move away from or approach the base (3) to maintain the gap. Further comprising a detection assembly (7) installed on the base (3), the detection assembly (7) being used for detecting the size of the gap between the limiting member (2) and the base (3). The limiting member (2) comprises a protection nut (21), the protection nut (21) being connected with the driving assembly (6); The first connecting member (1) is a lead screw, the protection nut (21) being threadedly connected with the lead screw, the driving assembly (6) being capable of driving the protection nut (21) to rotate on the lead screw so that the protection nut (21) moves away from or approaches the base (3) to maintain the gap. The limiting member (2) further comprises a driven gear (22), the driving assembly (6) comprising a driving gear (61), the driven gear (22) being fixedly connected coaxially with the protection nut (21), the driven gear (22) and the driving gear (61) being engaged.

2. A protection device for an electric motor drive system according to claim 1, characterized in that The limiting member (2) further comprises a guide seat (23), the guide seat (23) being sleeved on the outer periphery of the protection nut (21) and the outer periphery of the driven gear (22), the guide seat (23) rotating synchronously with the protection nut (21) and the driven gear (22).

3. A protection device for an electric motor drive system according to claim 2, characterized in that ​ 4. A protection device for an electric motor drive system according to claim 2, characterized in that ​ ​ 5. A protection device for an electric motor drive system according to claim 4, characterized in that ​ 6. A protection device for an electric motor drive system according to claim 5, characterized in that ​ 7. A protection device for an electric motor drive system according to claim 6, characterized in that The driving assembly (6) further comprises a motor (62) mounted on the guide seat (23), the motor (62) being connected with the driving gear (61) to drive the driving gear (61) to rotate, thereby driving the driven gear (22) to rotate.

8. A protection device for an electric motor drive system according to claim 1, characterized in that, The base (3) comprises a rotating assembly (31) and a base (32), the rotating assembly (31) being rotatably connected with the base (32), the first connecting piece (1) penetrating through the base (32) and being connected with the limiting piece (2) through the rotating assembly (31) to cooperate with the angle adjustment of the hydraulic device.

9. A protection device for an electric motor drive system according to claim 8, characterized in that The rotating assembly (31) comprises a body (311) and two bearings (312), the two bearings (312) being respectively connected with the opposite sides of the body (311), the two bearings (312) being rotatably connected with the base (32), the first connecting piece (1) penetrating through the base (32) and the body (311) and being connected with the limiting piece (2) to cooperate with the angle adjustment of the hydraulic device.

10. A protection device for an electric motor drive system according to claim 9, characterized in that Further comprising a cushion block (8) mounted on the body (311), the first connecting piece (1) penetrating through the cushion block (8) and being connected with the limiting piece (2) to protect the rotating assembly (31).

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