Flexible steering device and snow sweeper

Abstract

The invention discloses a flexible steering device, belongs to the field of snowsweepers, solves the problems of complex structure, inflexible steering and loud steering sound in the prior art, and adopts the technical scheme that the flexible steering device comprises a driver, a first transmission part, a second transmission part, a first output shaft, a second output shaft and a rolling body, the first output shaft and the second output shaft are rotationally connected, the first output shaft and the second output shaft are fixedly connected with second transmission parts respectively, the first transmission part is provided with a containing groove, the rolling body is rotationally arranged in the containing groove, and the rotating first transmission part drives the rolling body and the containing groove to move in the circumferential direction. And the rolling body is in contact with the second transmission piece to drive the second transmission piece to rotate, so that the first output shaft and the second output shaft are driven to rotate. According to the snow sweeper, the structure is simpler, steering is more flexible, and steering sound is smaller.

Description

Technical Field

[0001] The invention relates to the field of snow sweepers, in particular to a flexible steering device and a snow sweeper. Background Art

[0002] A snowplow is a tool used to clear snow. A snowplow can greatly save the time and manpower spent on clearing snow manually. In actual use, it will have relatively more turning requirements. If the machine is not flexible in turning or has a large turning radius, it will be difficult for the machine to turn. Inflexible steering will greatly increase the time required to clear a piece of snow, and will also bring an uncomfortable experience to the operator. To this end, the prior art, such as the invention patent CN113322879A, discloses a snowplow that uses a hub motor. When the snowplow is pushed in a straight line, the snowplow will be skewed and the pushing trajectory will have a slight "S" shape. Since the hub motor is integrated in the wheel hub, its mechanical structure is more complex, including a reduction mechanism (such as planetary gears, etc.) to match the speed and torque requirements of the wheel. During operation, these gears will generate mechanical vibration and noise due to the meshing between the teeth. The bearing system of the hub motor must withstand various complex working conditions during the driving of the snowplow, such as bumpy roads, frequent acceleration and deceleration, etc. This harsh working environment makes the bearings more prone to wear and vibration, thereby generating greater steering noise. Since the hub motor is directly installed near the wheel, its electromagnetic shielding is relatively weak. When the hub motor is running, the electromagnetic noise generated by the change in the internal electromagnetic force is more likely to propagate outward. The heat dissipation system of the hub motor may generate greater noise because it has to adapt to the space and working conditions of the snowplow. Summary of the invention

[0003] The purpose to be achieved by the present invention is to provide a flexible steering device, which solves the problems of complex structure, inflexible steering and loud steering noise in the existing device, making the structure simpler, the steering more flexible and the steering noise smaller.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a flexible steering device, including a driver, a first transmission member, a second transmission member, a first output shaft, a second output shaft and a rolling body, the driver is used to drive the first transmission member to rotate, the first output shaft and the second output shaft are rotationally connected, the first output shaft and the second output shaft are respectively fixedly connected with the second transmission member, the first transmission member is provided with a receiving groove, the rolling body is rotatably arranged in the receiving groove, the rotating first transmission member drives the rolling body and the receiving groove to move circumferentially so that the rolling body contacts or separates from the second transmission member, the rolling body contacts the second transmission member to drive the second transmission member to rotate, and then drives the first output shaft and the second output shaft to rotate.

[0005] After adopting the above technical scheme, the present invention has the following advantages: the rolling body and the accommodating groove are driven to move circumferentially by the rotating first transmission member, so that the rolling body contacts or separates from the second transmission member to realize the rotation of the first output shaft and the second output shaft. In this way, the rotation of the first output shaft and the second output shaft can be controlled more accurately, thereby realizing flexible steering operation, overcoming the problem of inflexible turning or large turning radius of snowplows in the prior art, and simplifying the mechanical structure. Fewer parts means fewer potential noise sources, especially in the case of frequent turning, acceleration, deceleration and bumpy road conditions, the overall noise level can be significantly improved. When turning, the rolling body and the second transmission member are separated, which greatly reduces the noise between the two. The friction is reduced and the steering noise is smaller. When steering is not required (i.e. the first output shaft and the second output shaft need to rotate synchronously), the rolling element contacts the second transmission member to ensure consistent transmission on both sides, ensuring that the snowplow moves forward smoothly in a straight line as much as possible, thereby minimizing the occurrence of problems such as an "S"-shaped trajectory. It can effectively improve the steering flexibility and operational accuracy in actual use scenarios such as clearing snow. This smooth motion path also avoids possible impact and vibration between the transmission structures, reduces unnecessary vibration and shaking, thereby reducing noise. The drive is not integrated in the wheel, and its electromagnetic force changes will not directly affect the area near the wheel, reducing the spread of electromagnetic noise, creating a relatively quiet and comfortable working environment for the operator and improving the operating experience.

[0006] Furthermore, the accommodating groove extends along the circumferential direction of the first transmission member, and the heights of the two end areas of the bottom wall of the accommodating groove are higher than the height of the middle area of ​​the bottom wall of the accommodating groove. When the rolling body is located in the two end areas of the accommodating groove, it contacts the second transmission member, and when the rolling body is located in the middle area of ​​the accommodating groove, it disengages from the second transmission member.

[0007] With the above-mentioned technical solution, when the rolling body is located at the two end areas at the bottom of the receiving groove, due to the high height here, the rolling body will contact with the second transmission member, which will cause the first output shaft and the second output shaft to rotate synchronously, making straight-line driving smoother. On the contrary, when the rolling body is located in the middle area of ​​the bottom wall of the receiving groove, it will be out of contact with the second transmission member, greatly reducing the friction between the two and reducing mechanical noise. The speed of the output shaft on one side slows down or stops, while the other side continues to rotate, thereby achieving steering. The need for reliance on electronic control systems can also be reduced. This means that even in cold conditions (such as the low temperature environment common in snow clearing operations), stable performance can be maintained without being affected by possible electronic components.

[0008] Furthermore, the bottom wall of the accommodating groove is an arc-shaped wall, a V-shaped wall, or a U-shaped wall.

[0009] By adopting the above-mentioned technical solution, the bottom wall of the accommodating groove can have a height difference, thereby achieving the contact between the rolling body and the second transmission member or the separation from the second transmission member.

[0010] Furthermore, the first transmission member and the second transmission member are coaxially arranged, and the first transmission member is provided with a plurality of accommodating grooves along a circumferential direction, and the rolling body is arranged in each of the accommodating grooves.

[0011] With the above technical solution, multiple receiving grooves and corresponding rolling elements mean that torque control of the output shafts on both sides can be achieved simultaneously or separately at different positions, which not only enhances the flexibility of steering, but also can more accurately adjust the speed difference of the wheels on both sides according to actual needs, providing a smoother and more controllable steering experience. Multiple rolling elements jointly bear the task of transmitting power from the driver, so that each rolling element is subjected to less pressure, reduces the wear rate, and ensures the service life of the components.

[0012] Furthermore, the first transmission member includes a transmission gear and a transmission ring fixed on both sides of the transmission gear, the second transmission member includes an inner ring and an outer ring, the outer side of the transmission ring is provided with the accommodating groove, the two inner rings of the second transmission members are respectively fixedly connected to the first output shaft and the second output shaft, and the two outer rings of the second transmission members are respectively sleeved on the outer sides of the transmission rings on both sides of the transmission gear.

[0013] The above-mentioned technical solution and the layered and nested modular design make it relatively easy to install and disassemble each component. During installation, the inner ring of the second transmission member can be fixedly connected to the output shaft first, and then the outer ring is sleeved on the outside of the transmission ring, and finally the transmission gear is installed. When maintenance or replacement of components is required, the operation can also be carried out in the reverse order.

[0014] Furthermore, the first transmission member contacts the side wall of the second transmission member, the first transmission member and the second transmission member are wrapped outside with a wrapping member, and the first transmission member and the second transmission member are positioned inside the wrapping member.

[0015] Through the above technical solution, the first transmission member is in direct contact with the side wall of the second transmission member. The close side wall contact provides better support effect and reduces the noise caused by vibration. The wrapping member wraps the first transmission member and the second transmission member, providing additional fixation and support, which helps to keep each component in the correct position and avoid displacement caused by vibration or impact. The existence of the wrapping member can effectively isolate and absorb vibrations from the first transmission member and the second transmission member. The wrapping member can be made of materials with shock-absorbing and noise-reducing properties (such as rubber, foam, etc.) to further reduce noise transmission.

[0016] Furthermore, the driver is disposed close to an area where the first output shaft and the second output shaft are rotationally connected.

[0017] With the above technical solution, the wheel hub is usually set at one end away from the first output shaft and the second output shaft, so that the driver is away from the wheel hub, which can be kept away from the sensitive area near the wheel, reducing the impact of electromagnetic force changes on the outside world, especially reducing the propagation path of electromagnetic noise. All key components are concentrated in the same area, which is convenient for implementing centralized shock-absorbing measures. High-efficiency shock-absorbing pads or shock-absorbing springs can be installed between the driver, the first output shaft and the second output shaft to effectively absorb and isolate vibrations and reduce noise. The main location layout of heat generation is also changed, so that heat is no longer concentrated in the wheel hub, reducing the negative impact of local overheating on the performance and service life of the wheel hub and the entire device, which helps the device to operate more stably and reliably for a long time. It does not involve the relevant coordination of the wheel hub, so the maintenance of the wheel hub is relatively simple. Correspondingly, it does not involve the tire installed on the wheel hub, so the maintenance of the tire is simpler.

[0018] Furthermore, the flexible steering device also includes a housing, the housing is rotatably connected to the second transmission member via a bearing, and the driver is mounted on the housing.

[0019] Through the above technical solution, the driver is installed on the shell, and the modular design facilitates disassembly and installation. Compared with the decentralized installation method of the driver, the structure of the device is more compact and the integration is higher. Noise reduction materials, such as shock absorbers made of rubber or plastic, can be used inside the shell to further reduce noise propagation.

[0020] Furthermore, the first output shaft and the second output shaft are connected via a connecting pin.

[0021] Through the above technical solution, the connecting pin is a simple and effective connection method, which can provide a relatively stable connection, ensuring that the first output shaft and the second output shaft will not easily loosen or separate during the power transmission and collaborative work process, and ensuring that the connection between the first output shaft and the second output shaft is still reliable even in the face of complex working conditions (such as driving on uneven roads, large forces generated when turning, etc.) during the operation of equipment such as snowplows. The installation process of the connecting pin is also relatively simple. It only needs to insert the connecting pin into the pre-designed connecting hole of the first output shaft and the second output shaft to complete the connection, without the need for complex assembly tools.

[0022] Another object of the present invention is to provide a snowplow, comprising a body, a snow scraper mounted on the body, and tires, and also comprising a flexible steering device as described in any of the above technical solutions, wherein the tires are fixed on a first output shaft and a second output shaft.

[0023] Through the above technical solution, the steering flexibility and operating stability of the snowplow are improved, and it can turn more accurately and quickly, avoiding instability in straight-line driving as much as possible. It can also make the structure simpler and the steering noise smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a structural schematic diagram of the flexible steering device in the present invention;

[0026] Figure 2 A cross-sectional view of the flexible steering device of the present invention;

[0027] Figure 3 It is a partial structural schematic diagram of the flexible steering device in the present invention;

[0028] Figure 4 is a schematic structural diagram of the first transmission member in the present invention;

[0029] In the figure, 10, driver; 11, output gear; 20, first transmission member; 21, accommodating groove; 22, transmission gear; 23, transmission ring; 24, mounting arm; 25, mounting groove; 30, second transmission member; 31, inner ring; 32, outer ring; 40, first output shaft; 50, second output shaft; 60, rolling body; 70, housing; 80, connecting pin; 90, connecting hole; 100, wrapping member. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein.

[0032] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0033] It should be understood that in the present invention, "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0034] It should be understood that in the present invention, "plurality" refers to two or more than two. "And / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0035] The technical solution of the present invention is described in detail with specific embodiments below. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0036] Embodiment 1:

[0037] like Figures 1 to 4 As shown, the present invention provides a flexible steering device, including a driver 10, a first transmission member 20, a second transmission member 30, a first output shaft 40, a second output shaft 50 and a rolling body 60. The driver 10 is used to drive the first transmission member 20 to rotate. The first output shaft 40 and the second output shaft 50 are rotatably connected. The first output shaft 40 and the second output shaft 50 are respectively fixedly connected with the second transmission member 30. The first transmission member 20 is provided with a receiving groove 21. The rolling body 60 is rotatably arranged in the receiving groove 21. The rotating first transmission member 20 drives the rolling body 60 and the receiving groove 21 to move circumferentially, so that the rolling body 60 contacts with the second transmission member 30 or separates from the second transmission member 30. The rolling body 60 contacts with the second transmission member 30 to drive the second transmission member 30 to rotate, thereby driving the first output shaft 40 and the second output shaft 50 to rotate.

[0038] The first transmission member 20 is driven by the rotating first transmission member 20 to drive the rolling body 60 and the receiving groove 21 to move circumferentially, so that the rolling body 60 contacts the second transmission member 30 or separates from the second transmission member 30 to realize the rotation of the first output shaft 40 and the second output shaft 50. In this way, the rotation of the first output shaft 40 and the second output shaft 50 can be controlled more accurately, thereby realizing flexible steering operation, overcoming the problem of inflexible turning or large turning radius of the snowplow in the prior art, and simplifying the mechanical structure. Fewer parts means fewer potential noise sources, especially in the case of frequent turning, acceleration, deceleration and bumpy road conditions, the overall noise level can be significantly improved. When turning, since the rolling body 60 and the second transmission member 30 are separated, this greatly reduces the friction between the two. Friction is reduced and the steering sound is smaller. When steering is not required (i.e., the first output shaft 40 and the second output shaft 50 need to rotate synchronously), the rolling body 60 contacts the second transmission member 30 to ensure consistent transmission on both sides, ensuring that the snowplow moves forward smoothly in a straight line, minimizing the occurrence of "S"-shaped tracks and other problems, and can effectively improve the steering flexibility and operating accuracy in actual use scenarios such as clearing snow. This smooth motion path also avoids possible impact and vibration between transmission structures, reduces unnecessary vibration and shaking, and thus reduces noise. The driver 10 is not integrated in the wheel, and its electromagnetic force changes will not directly affect the area near the wheel, reducing the propagation of electromagnetic noise, creating a relatively quiet and comfortable working environment for the operator, and improving the operating experience.

[0039] Specifically, the receiving groove 21 extends along the circumferential direction of the first transmission member 20, and the height of the two end areas of the bottom wall of the receiving groove 21 is higher than the height of the middle area of ​​the bottom wall of the receiving groove 21. When the rolling body 60 is located in the two end areas of the receiving groove 21, it contacts and squeezes the second transmission member 30, so that the first output shaft 40 and the second output shaft 50 can rotate synchronously, making the straight-line driving more stable. When the rolling body 60 is located in the middle area of ​​the receiving groove 21, it is disengaged from the second transmission member 30, which greatly reduces the friction between the two, reduces the mechanical noise, and reduces the need to rely on the electronic control system. In cold conditions (such as the low temperature environment commonly seen in snow removal operations), it can also maintain a relatively stable performance without being affected by the electronic components.

[0040] In order to improve the stability of steering, the first transmission member 20 and the second transmission member 30 are coaxially arranged. The first transmission member 20 is provided with a plurality of accommodating grooves 21 along the circumferential direction. A rolling body 60 is provided in each accommodating groove 21. The plurality of rolling bodies 60 jointly undertake the task of transmitting force from the driver 10, so that the pressure borne by each rolling body 60 is smaller, the wear rate is reduced, and the service life of the components is guaranteed. Not only the steering flexibility is enhanced, but also the speed difference of the wheels on both sides can be more accurately adjusted according to actual needs, providing a smoother and more controllable steering experience.

[0041] For easy installation, the first transmission member 20 includes a transmission gear 22 and a transmission ring 23 fixedly arranged on both sides of the transmission gear 22, the second transmission member 30 includes an inner ring 31 and an outer ring 32, the outer side of the transmission ring 23 is provided with a receiving groove 21, the inner rings 31 of the two second transmission members 30 are respectively fixedly connected to the first output shaft 40 and the second output shaft 50, and the outer rings 32 of the two second transmission members 30 are respectively sleeved on the outer sides of the transmission ring 23 on both sides of the transmission gear 22. The layered and nested modular design makes the installation and disassembly of each component relatively easy. During the installation process, the inner ring 31 of the second transmission member 30 can be first fixedly connected to the output shaft, and then the outer ring 32 can be sleeved on the outer side of the transmission ring 23, and finally the transmission gear 22 can be installed. When maintenance or replacement of components is required, the operation can also be performed in the reverse order.

[0042] Specifically, the two transmission rings 23 are provided with mounting arms 24 extending in the radial direction, and the inner side of the transmission gear 22 is provided with a mounting groove 25. The mounting arms 24 of the two transmission rings 23 are attached to each other and inserted into the mounting groove 25 of the transmission gear 22 to achieve fixed connection.

[0043] The transmission gear 22 is rotatably connected to the outer side of the inner ring 31 via a bearing. The bearing provides a more precise and stable rotation interface, which is conducive to the smooth and accurate rotation of the transmission gear 22 and can also avoid the problem of difficulty in turning caused by the transmission gear 22 driving the second transmission member 30.

[0044] In addition, the first transmission member 20 contacts the side wall of the second transmission member 30, and the contact provides a better support effect and reduces the noise caused by vibration. In order to achieve the positioning of the first transmission member 20 and the second transmission member 30, the outside of the first transmission member 20 and the second transmission member 30 is wrapped with a wrapping member 100, and the first transmission member 20 and the second transmission member 30 are positioned in the wrapping member 100. The wrapping member 100 provides additional fixation and support, which helps to keep the various components in the correct position and avoid displacement caused by vibration or impact. The presence of the wrapping member 100 can also effectively isolate and absorb vibrations from the first transmission member 20 and the second transmission member 30. The wrapping member 100 can be made of a material with shock-absorbing and noise-reducing properties (such as rubber, foam, etc.) to further reduce noise transmission.

[0045] In order to enhance the power performance of the device, the output shaft of the driver 10 is provided with an output gear 11, the output gear 11 and the transmission gear 22, the number of teeth of the output gear 11 is less than the number of teeth of the transmission gear 22, according to the torque amplification principle of gear transmission, when the output shaft of the driver 10 rotates, through the meshing of the output gear 11 and the transmission gear 22, the torque output by the driver 10 can be amplified and transmitted to the transmission gear 22, when clearing thick snow or working on a road with a certain slope, the amplified torque can make the device easier to overcome resistance, ensure the stable operation of the device, and enhance the power performance of the device. The difference in the number of teeth of the output gear 11 and the transmission gear 22 can also be used for speed regulation. The driver 10 outputs power at a certain speed. Through this gear transmission method, the transmission gear 22 can be rotated at a lower speed, which further facilitates the steering of the device.

[0046] In order to reduce the impact on the wheel hub, the driver 10 is arranged near the area where the first output shaft 40 and the second output shaft 50 are rotatably connected, and the wheel hub is usually arranged at one end away from the first output shaft 40 and the second output shaft 50, so that the driver 10 is far away from the wheel hub, and can be far away from the sensitive area near the wheel, reducing the impact of electromagnetic force changes on the outside world, especially reducing the propagation path of electromagnetic noise. All key components are concentrated in the same area, which is convenient for implementing centralized shock-absorbing measures. High-efficiency shock-absorbing pads or shock-absorbing springs can be installed between the driver 10, the first output shaft 40 and the second output shaft 50 to effectively absorb and isolate vibrations and reduce noise. It also changes the main location layout of heat generation, so that heat is no longer concentrated in the wheel hub, reducing the negative impact of local overheating on the wheel hub and the performance and service life of the entire device, which helps the device to operate more stably and reliably for a long time. It does not involve the relevant coordination of the wheel hub, and the maintenance of the wheel hub is relatively simple. Correspondingly, it does not involve the tire installed on the wheel hub, and the maintenance of the tire is simpler.

[0047] Furthermore, the transmission gear 22 may also be hollowed out to facilitate air circulation in the transmission gear 22 and reduce the temperature rise rate of the transmission gear 22 .

[0048] In order to further facilitate installation, the flexible steering device also includes a housing 70, which is rotatably connected to the second transmission member 30 through a bearing, and the driver 10 is mounted on the housing 70. The existence of the housing 70 provides physical protection for the various components inside the device, and noise reduction materials, such as shock absorbers made of rubber or plastic, can be used inside the housing 70 to further reduce noise propagation. In the actual use scenarios of equipment such as snowplows, various complex working conditions may be faced, such as collisions with external objects, impacts of ice and snow, etc. By wrapping the key components such as the internal driver 10 in the housing 70, these components can be effectively prevented from being directly physically damaged, and the reliability and durability of the device can be improved. In addition, the modular design is easy to disassemble and install, and compared with the scattered installation of the driver 10, the structure of the device is more compact and more integrated. The technician can first pre-install and debug the driver 10 on the housing 70, and then connect the housing 70 with the driver 10 to the second transmission member 30 through the bearing. This installation method is more convenient and efficient.

[0049] Furthermore, the first output shaft 40 and the second output shaft 50 are connected by a connecting pin 80, and the first output shaft 40 and the second output shaft 50 are provided with a connecting hole 90, one end of the connecting pin 80 is inserted into the connecting hole 90 of the first output shaft 40 to be rotatably connected to the first output shaft 40, and the other end of the connecting pin 80 is inserted into the connecting hole 90 of the second output shaft 50 to be rotatably connected to the second output shaft 50. The connecting pin 80 is a simple and effective connection method, which can provide a relatively stable connection, ensuring that the first output shaft 40 and the second output shaft 50 will not be easily loosened or separated during the power transmission and cooperative work process, and ensuring that the connection between the first output shaft 40 and the second output shaft 50 is still reliable even in the face of complex working conditions (such as driving on uneven roads, turning, etc.) during the operation of equipment such as snowplows. The installation process of the connecting pin 80 is also relatively simple, and the connection can be completed by simply inserting the connecting pin 80 into the pre-designed connecting hole 90 of the first output shaft 40 and the second output shaft 50, without the need for complex assembly tools.

[0050] In this embodiment, the bottom wall of the mounting groove 21 is an arc-shaped wall, so that the rolling body 60 moves more smoothly in the mounting groove 21, thereby achieving a more stable differential speed of the tires on both sides.

[0051] During use, when steering is required, when one of the tires on the first output shaft 40 and the second output shaft 50 is subjected to external force, the rotation speed of the output shaft on the side subjected to external force is lower than that of the output shaft on the side not subjected to external force, thereby reducing the rotation speed of the second transmission member 30. At this time, the second transmission member 30 subjected to external force applies a force to the rolling element 60 in the opposite direction of the rotation speed of the transmission gear 22, and the rolling element 60 moves in the receiving groove 21 and stays at a new equilibrium point, so that the rolling element 60 is disengaged from the second transmission member 30. Therefore, the unforced end is not affected by the external force and maintains the original rotation speed during steering. The rotation speed of the force-bearing end is lower than that of the unforced end to form a speed difference, thereby realizing flexible steering of the snowplow. In this embodiment, the first output shaft 40 is located on the left side and the second output shaft 50 is located on the right side. Specifically, when the device applies external force on the left side, the rotation speed of the first output shaft 40 decreases, and the device rotates to the left. When the device applies external force on the right side, the rotation speed of the second output shaft 50 decreases, and the device rotates to the right.

[0052] It should be noted that the rolling body 60 may be a ball or a roller. The driver 10 may be a driving motor.

[0053] It should be noted that the flexible steering device is not only suitable for snowplows, but can also be used for lawn mowers, cotton pickers, etc.

[0054] It is understandable that in other embodiments, the bottom wall of the mounting groove may also be a V-shaped wall or a U-shaped wall, which can provide better lateral support for the rolling body installed in the groove and reduce the problem of unstable operation of the device caused by shaking, deviation, etc.

[0055] Embodiment 2:

[0056] This embodiment discloses a snowplow, including a body, a snow scraper mounted on the body, and a tire, and also includes a flexible steering device of any one of the above embodiments, wherein the tire is fixed on a first output shaft and a second output shaft, thereby improving the steering flexibility and operating stability of the snowplow, enabling more precise and rapid steering, avoiding instability in straight-line driving as much as possible, making the structure simpler and reducing steering noise.

[0057] In addition to the above-mentioned preferred embodiments, the present invention also has other implementation modes. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A flexible steering device, characterized in that: The invention comprises a driver (10), a first transmission member (20), a second transmission member (30), a first output shaft (40), a second output shaft (50) and a rolling body (60), wherein the driver (10) is used to drive the first transmission member (20) to rotate, the first output shaft (40) and the second output shaft (50) are rotationally connected, the first output shaft (40) and the second output shaft (50) are respectively fixedly connected with the second transmission member (30), the first transmission member (20) is provided with a receiving groove (21), the rolling body (60) is rotatably arranged in the receiving groove (21), the rotating first transmission member (20) drives the rolling body (60) and the receiving groove (21) to move relative to each other in the circumferential direction, so that the rolling body (60) contacts with the second transmission member (30) or separates from the second transmission member (30), the rolling body (60) contacts with the second transmission member (30) to drive the second transmission member (30) to rotate, and further drives the first output shaft (40) and the second output shaft (50) to rotate.

2. The flexible steering device according to claim 1, characterized in that: The receiving groove (21) extends along the circumferential direction of the first transmission member (20); the heights of the two end regions of the bottom wall of the receiving groove (21) are higher than the height of the middle region of the bottom wall of the receiving groove (21); the rolling body (60) contacts the second transmission member (30) when it is located at the two end regions of the receiving groove (21); and the rolling body (60) is disengaged from the second transmission member (30) when it is located in the middle region of the receiving groove (21).

3. The flexible steering device according to claim 2, characterized in that: The bottom wall of the containing groove (21) is an arc-shaped wall, a V-shaped wall or a U-shaped wall.

4. The flexible steering device according to claim 1, characterized in that: The first transmission member (20) and the second transmission member (30) are coaxially arranged, the first transmission member (20) is provided with a plurality of accommodating grooves (21) along the circumferential direction, and the rolling body (60) is arranged in each of the accommodating grooves (21).

5. The flexible steering device according to claim 1, characterized in that: The first transmission member (20) comprises a transmission gear (22) and a transmission ring (23) fixedly arranged on both sides of the transmission gear (22); the second transmission member (30) comprises an inner ring (31) and an outer ring (32); the outer side of the transmission ring (23) is provided with the accommodating groove (21); the inner rings (31) of the two second transmission members (30) are respectively fixedly connected to the first output shaft (40) and the second output shaft (50); the outer rings (32) of the two second transmission members (30) are respectively sleeved on the outer sides of the transmission rings (23) on both sides of the transmission gear (22).

6. The flexible steering device according to claim 1, characterized in that: The first transmission member (20) contacts the side wall of the second transmission member (30); the first transmission member (20) and the second transmission member (30) are wrapped with a wrapping member (100) on the outside; the first transmission member (20) and the second transmission member (30) are positioned inside the wrapping member (100).

7. The flexible steering device according to claim 1, characterized in that: The driver (10) is arranged near an area where the first output shaft (40) and the second output shaft (50) are rotationally connected.

8. The flexible steering device according to claim 1, characterized in that: The flexible steering device further comprises a housing (70), wherein the housing (70) is rotatably connected to the second transmission member (30) via a bearing, and the driver (10) is mounted on the housing (70).

9. The flexible steering device according to claim 1, characterized in that: The first output shaft (40) and the second output shaft (50) are connected via a connecting pin (80).

10. A snow sweeper, comprising a body, a snow scraper mounted on the body and a tire, characterized in that: It also comprises the flexible steering device as claimed in any one of claims 1 to 9, wherein the tires are fixed on the first output shaft (40) and the second output shaft (50).

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