Driving structure for oil cylinder retaining device, oil cylinder retaining device and oil cylinder

Abstract

The utility model provides a driving structure for an oil cylinder retaining device, the oil cylinder retaining device and an oil cylinder. The rotating shaft penetrates through the base plate assembly and is used for driving the base plate assembly to turn over through rotation; and the reduction gear is arranged between the motor and the rotating shaft and is used for transmitting the power of the motor to the rotating shaft. The utility model provides a driving structure capable of driving the oil cylinder retaining device to operate stably, which can stably drive the backing plate component to topple over and realize safe and effective mechanical locking of the oil cylinder, so that the oil cylinder can be better protected, and potential safety hazards of the oil cylinder are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic systems, and particularly to a driving structure for an oil cylinder anti-retreat device, an oil cylinder anti-retreat device and an oil cylinder. Background Art

[0002] As an important component in a hydraulic system, an oil cylinder plays a crucial role in the operation and work of mechanical equipment. It is widely used in various equipment such as excavators, cranes, presses, machine tools, construction machinery, etc., and various industries such as electric power, construction, machinery manufacturing, mines, railway bridges, shipbuilding, etc. The oil cylinder can provide powerful force and precise control, enabling related equipment to efficiently complete various work tasks.

[0003] An oil cylinder mainly consists of a cylinder body (cylinder barrel and cylinder head), a piston, a piston rod, a sealing structure, and accessories such as oil ports, a base, fixing screws, and a shock absorption device. The piston rod is connected to the machine body through an end cover, and the piston is connected to the piston rod. The working mode of the oil cylinder is based on the principle of liquid pressure transmission. When liquid enters the oil cylinder, the piston will be pushed out; when the liquid is discharged, the piston will retract. This reciprocating movement of the piston can convert the pressure of the liquid into a linear motion force.

[0004] When the oil cylinder is working, due to reasons such as oil circuit blockage, insufficient hydraulic oil, aging of the oil cylinder seals, overload, oil leakage, etc., the oil cylinder may not be able to provide the necessary jacking force and may experience accidental retraction, thus affecting the normal and stable operation of the equipment. Therefore, it is very necessary to set an oil cylinder anti-retreat device for the oil cylinder to avoid accidental retraction of the oil cylinder.

[0005] The existing oil cylinder anti-retreat devices in the prior art usually utilize the self-weight of the anti-retreat gasket to make it naturally fall as the piston extends. For example, the Chinese utility model patent with the authorization announcement number CN212479757U discloses an oil cylinder anti-retreat device. A group of multiple anti-retreat pads are provided on each of the left and right sides of the device, and the anti-retreat pads are arranged between the oil cylinder body and the bearing plate. The motor is coaxially arranged with the rotating shaft and is directly connected to each other, so that the motor drives the rotating shaft to rotate, thereby driving the anti-retreat pads to flip. The problems existing in the above prior art are that it is difficult for the motor to achieve large torque output, and its power consumption is large and unstable.

[0006] The stability of the operation of the oil cylinder anti-retreat device depends to a large extent on the performance of its driving mechanism. Therefore, how to provide a driving mechanism that can operate smoothly to drive the stable operation of the oil cylinder anti-retreat device is a technical problem that those skilled in the art urgently need to solve. Summary of the Utility Model

[0007] What the utility model solves is how to provide a driving structure that can drive the oil cylinder anti-retreat device to operate stably.

[0008] To solve the above problems, the present utility model provides a drive structure for an oil cylinder anti-retreat device. The oil cylinder anti-retreat device includes a backing plate assembly, and the drive structure includes: a motor; a rotating shaft that penetrates the backing plate assembly and is used to drive the backing plate assembly to flip by rotation; a reduction gear that is arranged between the motor and the rotating shaft and is used to transmit the power of the motor to the rotating shaft.

[0009] In the above technical solution, the reduction gear includes: a first gear sleeved on the output shaft of the motor; a second gear sleeved on the rotating shaft; wherein, the output shaft of the motor is parallel to the rotating shaft, and the first gear and the second gear mesh with each other.

[0010] In the above technical solution, the first gear and at least part of the motor are arranged in the upper region of the second gear.

[0011] In the above technical solution, the axial width of the first gear is greater than the axial width of the second gear.

[0012] In the above technical solution, the tooth number ratio between the first gear and the second gear is 250 to 350.

[0013] In the above technical solution, the motor is a turbine motor.

[0014] The present utility model also provides an oil cylinder anti-retreat device, which includes: a backing plate assembly; the drive structure according to any of the above technical solutions; wherein, the drive structure is used to drive the backing plate assembly to flip so that the backing plate assembly restricts the retraction of the oil cylinder.

[0015] In the above technical solution, the oil cylinder anti-retreat device further includes: an elastic drive part. The backing plate assembly includes a plurality of anti-retreat backing plates, and the elastic drive part is arranged between any at least one anti-retreat backing plate and the rotating shaft; wherein, the elastic drive part is used to cooperate with the drive structure to drive any at least one anti-retreat backing plate to tilt under the action of elastic force.

[0016] The present utility model also provides an oil cylinder, which includes: an oil cylinder body; a piston rod that can expand and contract relative to the oil cylinder body; the oil cylinder anti-retreat device according to any of the above technical solutions; wherein, the oil cylinder anti-retreat device is used to restrict the piston rod from contracting relative to the oil cylinder body.

[0017] In the above technical solution, the oil cylinder further includes: a backing plate carrier for carrying the oil cylinder anti-retreat device; wherein, the backing plate assembly and the reduction gear are respectively arranged on the inner and outer sides of the backing plate carrier.

[0018] Beneficial effects

[0019] The present utility model provides a driving structure for an oil cylinder anti-retraction device, and the oil cylinder anti-retraction device includes a backing plate assembly. The driving structure of the present utility model includes: a motor and a rotating shaft. The rotating shaft penetrates through the backing plate assembly and is used to drive the backing plate assembly to flip by rotation. Thus, the backing plate assembly can fall under its own weight during the extension process of the oil cylinder piston rod to block the piston rod and limit its retraction, so as to achieve the purpose of anti-retraction and protecting the oil cylinder. The driving structure of the present utility model further includes a reduction gear, which is arranged between the motor and the rotating shaft and is used to transmit the power of the motor to the rotating shaft. As a transmission component between the motor and the rotating shaft, the reduction gear can reduce the motor speed and increase the torque of the motor while transmitting power. Thus, the motor can provide a greater torque for the oil cylinder anti-retraction device without changing the power and maintain a stable output of the torque, so as to drive the oil cylinder anti-retraction device to operate smoothly. Description of the Drawings

[0020] Figure 1 It is a side view schematic diagram of the driving structure according to an embodiment of the present utility model;

[0021] Figure 2 It is a front view schematic diagram of the driving structure according to an embodiment of the present utility model;

[0022] Figure 3 It is Figure 1 a partial enlarged view of part A in

[0023] Figure 4 It is a top view schematic diagram of the initial state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0024] Figure 5 It is a top view schematic diagram of the partially extended state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0025] Figure 6 It is a top view schematic diagram of the fully extended state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0026] Figure 7 It is a front view schematic diagram of the initial state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0027] Figure 8 It is a front view schematic diagram of the partially extended state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0028] Figure 9 It is a front view schematic diagram of the fully extended state of the oil cylinder anti-retraction device according to an embodiment of the present utility model;

[0029] Figure 10 It is a part structure schematic diagram of the anti-retraction backing plate according to an embodiment of the present utility model;

[0030] Figure 11 Schematic diagram of the part structure of the rotating shaft according to an embodiment of the present utility model;

[0031] Figure 12 Schematic diagram of the cooperation between the anti-return backing plate and the rotating shaft according to an embodiment of the present utility model;

[0032] Figure 13 Front view schematic diagram of the initial state of the oil cylinder anti-return device according to another embodiment of the present utility model;

[0033] Figure 14 Front view schematic diagram of the partially extended state of the oil cylinder anti-return device according to another embodiment of the present utility model;

[0034] Figure 15 Front view schematic diagram of the fully extended state of the oil cylinder anti-return device according to another embodiment of the present utility model;

[0035] Figure 16 Schematic diagram of the part structure of the anti-return backing plate according to another embodiment of the present utility model;

[0036] Figure 17 Schematic diagram of the part structure of the rotating shaft according to another embodiment of the present utility model;

[0037] Figure 18 Schematic diagram of the cooperation between the anti-return backing plate and the rotating shaft according to another embodiment of the present utility model.

[0038] Explanation of reference numerals:

[0039] Oil cylinder body: 110; piston rod: 120; connecting member: 130; backing plate carrier: 140; first connection part: 141; second connection part: 142; carrier frame: 143; bolt: 150; support member: 160; support plate: 161; connection plate: 162; reinforcing rib: 163; backing plate assembly: 210; first anti-return backing plate: 211; Nth anti-return backing plate: 212; through hole: 220; arc groove: 230; motor: 310; rotating shaft: 320; convex block: 330; first spring: 340; groove: 350; second spring: 360; ratchet groove: 370; ratchet pawl: 380; wrenching part: 390; reduction gear: 400; first gear: 410; second gear: 420; axial width of the first gear: W1; axial width of the second gear W2. Detailed implementation manners

[0040] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings.

[0041] The present utility model provides a driving structure for an oil cylinder anti-retraction device. When the oil cylinder is in the working state, it may experience the phenomenon that the oil cylinder cannot provide the necessary jacking force and the piston rod retracts unexpectedly due to reasons such as oil circuit blockage, insufficient hydraulic oil, aging of the oil cylinder seal, overloading, oil leakage, etc. The unexpected retraction of the piston rod of the oil cylinder will affect the normal operation of the equipment, and the oil cylinder anti-retraction device is used to limit the unexpected retraction or failure of the piston rod of the oil cylinder.

[0042] As Figure 1 and Figure 2 shown, in order to achieve the above functions, the oil cylinder anti-retraction device of the present utility model includes: a backing plate assembly 210, and the backing plate assembly 210 includes a plurality of anti-retraction backing plates; a driving structure, and the driving structure includes a motor 310 and a rotating shaft 320 that is in transmission connection with the motor 310 and penetrates through the anti-retraction backing plates.

[0043] Specifically, the oil cylinder anti-retraction device of the present utility model needs to cooperate with the oil cylinder. The oil cylinder includes an oil cylinder body 110 and a piston rod 120. The piston rod 120 realizes power supply by telescoping relative to the oil cylinder body 110. Among them, the backing plate assembly 210 and the driving structure are respectively arranged in pairs on the opposite sides of the oil cylinder.

[0044] Since the backing plate assembly 210 and the driving structure on the opposite sides of the oil cylinder have the same structure and corresponding positions, the present utility model takes the backing plate assembly 210 and the driving structure on one side as an example to illustrate their shape structure, function and working principle.

[0045] As Figures 4 to 6 shown, the backing plate assembly 210 includes a plurality of anti-retraction backing plates arranged along the telescoping direction of the piston rod 120. Each anti-retraction backing plate has the same shape and is sequentially stacked and attached to each other. The number of anti-retraction backing plates in a set of backing plate assemblies 210 can be selected and adjusted by those skilled in the art according to the telescoping amount of the piston rod 120. The shape of the anti-retraction backing plate can be a fan blade shape, a rectangle, a triangle or any other shape as long as it can achieve the blocking of the piston rod 120. Among them, the anti-retraction backing plate with a fan blade shape has a lower center of gravity, which is more conducive to the smooth tipping of the anti-retraction backing plate under the action of its own weight.

[0046] Figures 4 to 6 Sequentially shown are schematic structural diagrams of the oil cylinder anti-retraction device of an embodiment of the present utility model in the initial state, the partially extended state, and the fully extended state when viewed in the top-down direction.

[0047] Figures 7 to 9 Sequentially shown are schematic structural diagrams of the oil cylinder anti-retraction device of an embodiment of the present utility model in the initial state, the partially extended state, and the fully extended state when viewed in the front direction.

[0048] As Figure 4 and Figure 7As shown, in the initial state, the piston rod 120 has not extended, and all the anti-retraction pads in the pad assemblies 210 on both sides of the piston rod 120 remain vertically upright longitudinally. As the piston rod 120 extends, a gap appears between the connecting piece 130, the cylinder body 110, and the piston rod 120. When the width of the gap reaches the thickness of one anti-retraction pad, a pair of first anti-retraction pads 211 on the opposite sides of the piston rod 120 tilt horizontally relative to each other under the action of their own weight.

[0049] As Figure 5 and Figure 8 shown, as the piston rod 120 extends to a certain length, the gap between the connecting piece 130, the cylinder body 110, and the piston rod 120 increases, and the first anti-retraction pad 211 to the (N - 1)-th anti-retraction pad in the pad assemblies 210 on both sides of the piston rod 120 tilt horizontally relative to each other under the action of their own weight, thereby restricting the accidental retraction of the piston rod 120. The N-th anti-retraction pad 212 to the last anti-retraction pad still remain vertically upright longitudinally.

[0050] As Figure 6 and Figure 9 shown, as the piston rod 120 extends completely, all the anti-retraction pads in the pad assemblies 210 on both sides of the piston rod 120 have tilted.

[0051] Before the piston rod 120 needs to retract normally, the left motor 310 can be controlled to drive the left rotating shaft 320 to rotate counterclockwise, and the right motor 310 can be controlled to drive the right rotating shaft 320 to rotate clockwise. Thus, driven by the power of the motor 310, the anti-retraction pads on the left and right sides that have tilted are driven to flip up vertically together to avoid the retraction path of the piston rod 120.

[0052] It can be understood that the main function of the driving structure is to drive the anti-retraction pad to flip from the horizontally tilted state to the vertically upright state. However, during the process of the anti-retraction pad changing from the vertically upright state to the horizontally tilted state, the driving structure also needs to rotate accordingly to cooperate with the tilting process of the anti-retraction pad.

[0053] For example, when the first anti-retraction pad 211 on the left side tilts horizontally, the left motor 310 needs to be synchronously controlled to drive the left rotating shaft 320 to rotate clockwise, and the right motor 310 needs to be synchronously controlled to drive the right rotating shaft 320 to rotate counterclockwise so that the first anti-retraction pad 211 can tilt.

[0054] The function of the driving structure is to drive the rotation of the anti-retreat backing plate. The driving structure includes a motor 310 and a rotating shaft 320. The motor 310 is arranged at the end of the backing plate assembly 210. The rotating shaft 320 is arranged along the telescopic direction of the piston rod 120 and sequentially penetrates through a plurality of anti-retreat backing plates. A reduction gear 400 is arranged between the motor 310 and the rotating shaft 320 and is used to transmit the power of the motor 310 to the rotating shaft 320. Thus, the rotating shaft 320 can drive the anti-retreat backing plate to flip under the driving action of the motor 310. Among them, the driving structure is mainly used to drive the anti-retreat backing plate to flip from the horizontal dumping state to the longitudinal upright state. When necessary, the driving structure can also drive or cooperate with the anti-retreat backing plate to flip from the longitudinal upright state to the horizontal dumping state through rotation.

[0055] In the present utility model, the reduction gear 400 is arranged between the motor 310 and the rotating shaft 320 and is used to transmit the power of the motor 310 to the rotating shaft 320. As a transmission component between the motor 310 and the rotating shaft 320, the reduction gear can reduce the rotation speed of the motor 310 and increase the torque of the motor 310 while transmitting the power. Thus, without changing the power, the motor 310 can provide a greater torque for the oil cylinder anti-retreat device and maintain a stable output of the torque, thereby driving the oil cylinder anti-retreat device to operate smoothly.

[0056] The backing plate assembly 210 of the present utility model is connected to the piston rod 120 through a connecting piece 130. Therefore, during the extension process of the piston rod 120, several anti-retreat backing plates in the backing plate assembly 210 can, under the action of their own weight, sequentially follow the extension process of the piston rod 120 and tilt, and enter the gap formed by the surrounding of the connecting piece 130, the oil cylinder body 110 and the piston rod 120 to stop the piston rod 120 and limit its retraction. Before the piston rod 120 needs to retract normally, the driving motor 310 can be controlled to drive the rotating shaft 320 to rotate through the reduction gear 400, so as to drive the already tilted anti-retreat backing plate to flip up by the power of the motor 310 to avoid the retraction path of the piston rod 120.

[0057] It can be understood that various reduction structures such as gear reducers, worm reducers, and planetary gear reducers can all achieve the functions of power transmission and torque increase. The present utility model preferably adopts a gear reduction structure to achieve the purpose of reducing the rotation speed of the motor 310 to the required rotation speed and obtaining a larger torque. Specifically, as Figure 3 shown, the reduction gear 400 includes: a first gear 410 sleeved on the output shaft of the motor 310; a second gear 420 sleeved on the rotating shaft 320; wherein, the output shaft of the motor 310 is parallel to the rotating shaft 320, and the first gear 410 and the second gear 420 are meshed with each other.

[0058] Since the first gear 410 is sleeved on the output shaft of the motor 310 and the second gear 420 is sleeved on the rotating shaft 320, the first gear 410 and the second gear 420 that mesh with each other can stably transmit power and torque with a simple structure, have a small volume, lower error, low cost, and are easy to process and manufacture.

[0059] As Figure 3 shown, preferably, the first gear 410 and at least part of the motor 310 are arranged in the upper region of the second gear 420, which is convenient for the installation and maintenance of the first gear 410 and the motor 310.

[0060] As Figure 3 shown, preferably, the axial width W1 of the first gear 410 is greater than the axial width W2 of the second gear 420. Since the axial width W1 of the first gear 410 is longer and the axial width W2 of the second gear 420 is shorter, a gap can be left between the first gear 410 and the second gear 420, which is convenient for installing the set screw of the first gear 410, and then quickly and conveniently fixing the first gear 410 on the output shaft of the motor 310.

[0061] Preferably, the tooth ratio between the first gear 410 and the second gear 420 is 250 to 350. Further preferably, the tooth ratio between the first gear 410 and the second gear 420 is 250 to 350. More preferably, the tooth ratio between the first gear 410 and the second gear 420 is 290.

[0062] For a general motor such as an asynchronous motor, its starting current is large while the torque is small, and the starting characteristics are relatively poor, making it difficult to meet the usage requirements of the oil cylinder anti-retreat device. Therefore, the motor 310 preferably adopted in the present utility model is a turbine motor, and the turbine motor has better starting performance. It can provide a large torque at a lower speed, which not only makes the power consumption required for the oil cylinder anti-retreat device to achieve mechanical locking lower, but also ensures the stable power output of the large torque of the motor 310.

[0063] Regarding the oil cylinder anti-retreat device of the present utility model, it includes a backing plate assembly 210 and the above-mentioned driving structure; wherein, the driving structure is used to drive the backing plate assembly 210 to flip so that the backing plate assembly 210 restricts the retraction of the oil cylinder.

[0064] Through the above structure, the control of the dumping and erection of the backing plate assembly 210 can be realized, so that the oil cylinder anti-retreat device can prevent the piston rod 120 from accidentally retracting. However, there is still a problem with the oil cylinder anti-retreat device in the prior art, that is, its operating stability is not ideal enough, resulting in potential safety hazards during the operation of the oil cylinder.

[0065] Specifically, as described above, the anti-retreat backing plate in the backing plate assembly 210 needs to tilt under its own weight. Therefore, the existing oil cylinder anti-retreat device is only applicable to the case where the oil cylinder is arranged horizontally. Only when the oil cylinder is strictly arranged horizontally can the anti-retreat backing plates on both sides tilt naturally under their own weight. However, in actual working scenarios, the installation conditions of the oil cylinder are complex and variable, and it often cannot be installed strictly horizontally or tilts during use. Therefore, in non-horizontal installation conditions, the existing oil cylinder anti-retreat device will experience jamming and abnormal tilting, posing a safety hazard to the operation of the oil cylinder.

[0066] To avoid jamming when the anti-retreat backing plate tilts and ensure that the backing plate assembly 210 stably exerts its mechanical locking function, the oil cylinder anti-retreat device of the present invention is also provided with an elastic driving part. The elastic driving part is arranged between at least one of the anti-retreat backing plates and the rotating shaft 320. Among them, the elastic driving part is used to cooperate with the driving structure to drive at least one of the anti-retreat backing plates to tilt under the action of elastic force.

[0067] The present invention can be provided with corresponding elastic driving parts for all the anti-retreat backing plates, or only for some of the anti-retreat backing plates. Since the elastic driving part is arranged between the anti-retreat backing plate and the rotating shaft 320, during the process of the motor 310 driving the rotating shaft 320 to drive the anti-retreat backing plate to rotate, the elastic driving part accumulates elastic force. The elastic driving part assists in driving the anti-retreat backing plate to tilt smoothly by releasing the accumulated elastic force.

[0068] Thus, through the setting of the elastic driving part, the tilting of the anti-retreat backing plate no longer depends only on its own weight, but can tilt under the combined drive of its own weight and the elastic force of the elastic driving part. Therefore, the oil cylinder anti-retreat device of the present invention is more stable and effective, and can adapt to various working conditions. Even when the oil cylinder is not horizontally installed or tilts during use, it can smoothly tilt following the extension of the piston rod 120, providing more effective protection for the oil cylinder.

[0069] In addition, in some cases, the already extended piston rod 120 may need to increase its extension amount. At this time, the backing plate assembly 210 needs to play the role of secondary mechanical locking. In other words, assuming that there are already three anti-retreat backing plates tilted on each side of the piston rod 120, as the extension amount of the piston rod 120 increases, three more anti-retreat backing plates on each side of the piston rod 120 need to tilt towards the horizontal direction. When playing the role of secondary mechanical locking, the originally upright anti-retreat backing plates are also prone to problems such as jamming and abnormal tilting during tilting. The setting of the elastic driving part can enable the backing plate assembly 210 to stably play the role of secondary mechanical locking and protect the oil cylinder in the case where the telescopic amount of the piston rod 120 needs to be adjusted.

[0070] It can be understood that in the technical solution of the present utility model, the backing plate assembly 210, the driving structure, and the elastic driving part are respectively arranged in pairs on the opposite sides of the oil cylinder, so as to make the forces on both sides of the oil cylinder consistent, thereby stably protecting the oil cylinder.

[0071] As Figures 10 to 12 shown, in an example of the present utility model, at least a part of the elastic driving part is formed as a first spring 340, and the first spring 340 is compressed as the rotating shaft 320 rotates, so as to apply an elastic force to the anti-retreat backing plate.

[0072] As described above, during the process of the anti-retreat backing plate changing from the longitudinal upright state to the horizontal tilting state, it is necessary to control the motor 310 to drive the rotating shaft 320 to rotate accordingly to cooperate with the tilting process of the anti-retreat backing plate. Since the elastic driving part formed as the first spring 340 is arranged between the anti-retreat backing plate and the rotating shaft 320, during the rotation of the rotating shaft 320, the first spring 340 between the non-tilted anti-retreat backing plate and the rotating shaft 320 will be compressed and store elastic force. When the non-tilted anti-retreat backing plate is pulled out following the piston rod 120, the stored elastic force will be released and jointly act with the self-weight of the anti-retreat backing plate to drive the anti-retreat backing plate to tilt, thereby ensuring that the anti-retreat backing plate can tilt smoothly even when the oil cylinder is not horizontally installed.

[0073] As Figures 10 to 12 shown, in this embodiment, the anti-retreat backing plate is provided with a through hole 220 for the rotating shaft 320 to pass through, and an arc-shaped groove 230 is provided at a part of the edge of the through hole 220; the rotating shaft 320 is provided with a convex block 330 that can be embedded in the arc-shaped groove 230; the first spring 340 is arranged in the arc-shaped groove 230 and abuts against the convex block 330.

[0074] Specifically, as Figures 10 to 12 shown, the shape of the through hole 220 is circular, and its size is adapted to the diameter of the rotating shaft 320. The arc-shaped groove 230 is opened on the outer periphery of the through hole 220, and the range of its central angle is approximately 90° to 150°. The thickness of the arc-shaped groove 230 is adapted to the height of the convex block 330. The convex block 330 and the rotating shaft 320 can be processed and manufactured in an integrally formed manner by cutting. The setting direction of the convex block 330 extends along the axial direction of the rotating shaft 320. One end of the first spring 340 abuts against the inner wall of the arc-shaped groove 230, and the other end abuts against the convex block 330 arranged in the arc-shaped groove 230. Among them, the two ends of the first spring 340 can be in contact with the inner wall of the arc-shaped groove 230 and the convex block 330 respectively but not fixedly connected, and the two ends of the first spring 340 can also be fixedly connected to the inner wall of the arc-shaped groove 230 and the convex block 330 respectively.

[0075] It can be understood that under the driving action of the motor 310, the rotating shaft 320 rotates and compresses the first spring 340 in the arc-shaped groove 230, thereby enabling the first spring 340 to accumulate elastic force and assisting the anti-retreat backing plate to tilt. By providing the arc-shaped groove 230 at the edge of the through-hole 220 of the anti-retreat backing plate and arranging the first spring 340 in the arc-shaped groove 230 to abut against the bump 330 on the rotating shaft 320, the first spring 340 can be protected and limited from stopping by a simple structure, preventing the first spring 340 from coming out, ensuring the stable operation of the first spring 340, and further ensuring the stable operation of the oil cylinder anti-retreat device.

[0076] Figures 13 to 15 Successively shown are schematic structural diagrams of the oil cylinder anti-retreat device according to another embodiment of the present invention in the initial state, partially extended state, and fully extended state when viewed in the front direction. Its state changes in the top view direction are the same as Figures 4 to 6 the same.

[0077] In another embodiment of the present invention, the shape and structure of its elastic driving part change, but the operating principle of the oil cylinder anti-retreat device remains the same, so it will not be elaborated here.

[0078] Figures 16 to 18 Shown is the shape and structure of the elastic driving part in another embodiment of the present invention, as well as its cooperation relationship with other components. In another embodiment of the present invention, at least a part of the elastic driving part is formed as the second spring 360, and the second spring 360 is compressed as the rotating shaft 320 rotates to limit the anti-retreat backing plate from rotating following the rotating shaft 320.

[0079] As described above, during the process of the anti-retreat backing plate changing from the longitudinal upright state to the horizontal tilting state, it is necessary to control the motor 310 to drive the rotating shaft 320 to rotate accordingly to cooperate with the tilting process of the anti-retreat backing plate. Correspondingly, once a part of the anti-retreat backing plate has tilted, the rotating shaft 320 must have rotated. Since the rotation angle of the rotating shaft 320 is limited, it is difficult for the anti-retreat backing plate that has not tilted to be driven by the rotating shaft 320 any more and can only tilt by its own weight, thereby increasing the possibility that it cannot tilt smoothly. In another embodiment of the present invention, since the elastic driving part formed as the second spring 360 is arranged between the anti-retreat backing plate and the rotating shaft 320, and the second spring 360 can limit the anti-retreat backing plate from rotating following the rotating shaft 320, so that the anti-retreat backing plate and the rotating shaft 320 are temporarily separated from each other. When the rotating shaft 320 cannot provide power for the tilting of the anti-retreat backing plate due to the limited rotation angle, the output torque of the rotating shaft 320 can be increased so that it can engage with the anti-retreat backing plate again after rotating one circle, thereby providing power for the tilting of the anti-retreat backing plate.

[0080] As Figures 16 to 18As shown, in this embodiment, the anti-reverse backing plate is provided with a through hole 220 for the rotating shaft 320 to pass through, and a ratchet groove 370 is provided at a part of the edge of the through hole 220; the rotating shaft 320 is provided with a groove 350, and a ratchet pawl 380 is embedded in the groove 350 and cooperates with the ratchet groove 370; the second spring 360 is arranged in the groove 350 and elastically connects the rotating shaft 320 and the ratchet pawl 380.

[0081] Specifically, the shape of the through hole 220 is circular, and its size is adapted to the diameter of the rotating shaft 320. The ratchet groove 370 is opened on the outer circumference of the through hole 220, and the range of its central angle is about 90° to 150°. A number of continuously distributed ratchet teeth are provided in the ratchet groove 370, and the number of ratchet teeth is preferably 4 to 6. The shape of the ratchet teeth is adapted to the shape of the ratchet pawl 380. The opening direction of the groove 350 extends along the axial direction of the rotating shaft 320.

[0082] One end of the second spring 360 is abutted and connected to the bottom wall of the groove 350, and the other end is abutted and connected to the ratchet pawl 380. Thus, when an external force acts on the ratchet pawl 380, the second spring 360 is compressed, and at least part of the ratchet pawl 380 contracts into the groove 350. After the external force acting on the ratchet pawl 380 disappears, the second spring 360 is released, and at least part of the ratchet pawl 380 extends out of the groove 350.

[0083] As Figure 13 shown, in the initial state, the piston rod 120 has not extended out, and the ratchet pawl 380 corresponding to the first anti-reverse backing plate 211 is engaged with one of the ratchet teeth in the ratchet groove 370 under the action of the spring force. As Figure 14 shown, as the piston rod 120 extends to a certain length, several anti-reverse backing plates have tilted relatively in the horizontal direction. At this time, if the piston rod 120 needs to increase its extension amount, more anti-reverse backing plates need to continue to tilt. At this time, the motor 310 can be controlled to drive the rotating shaft 320 to rotate. When the ratchet pawl 380 rotates accordingly, it is subjected to an external force, the second spring 360 is compressed, the ratchet pawl 380 extends into the groove 350 and disengages from the ratchet groove 370. Thus, after the rotating shaft 320 rotates one circle, it is engaged with the anti-reverse backing plate again through the ratchet and pawl structure, so as to continue to provide the power for the anti-reverse backing plates that have not tilted to tilt.

[0084] As Figure 4 shown, in another embodiment of the present utility model, the oil cylinder further includes: a backing plate carrier 140, and the backing plate carrier 140 is used to carry the oil cylinder anti-reverse device; wherein, the backing plate assembly 210 and the reduction gear 400 are respectively arranged on the inner and outer sides of the backing plate carrier 140.

[0085] The connecting member 130 of the oil cylinder is used to connect the oil cylinder anti-retreat device with the piston rod 120; the backing plate carrier 140 is used to carry the oil cylinder anti-retreat device; wherein, the oil cylinder anti-retreat device further includes a wrenching part 390 sleeved on the rotating shaft 320; the backing plate carrier 140 is connected with the connecting member 130 and forms an open space for accommodating the wrenching part 390. Preferably, the backing plate carrier 140 and the connecting member 130 are connected by bolts 150.

[0086] The oil cylinder anti-retreat device is connected with the piston rod 120 through the connecting member 130, so it can move along with the piston rod 120. When the anti-retreat backing plate is reset, in addition to being driven by the motor 310, the rotating shaft 320 can also be manually driven to rotate through the wrenching part 390 so that the anti-retreat backing plate is reset. The wrenching part 390 is arranged in the open space formed by the backing plate carrier 140 and the connecting member 130, which can save space and reduce the volume of the oil cylinder.

[0087] As Figure 4 shown, preferably, the backing plate carrier 140 includes: a first connecting part 141, the first connecting part 141 is connected with the connecting member 130; a second connecting part 142, one end of the second connecting part 142 is connected with the first connecting part 141, and the other end is connected with the bearing frame 143; the bearing frame 143 is used to carry the oil cylinder anti-retreat device; wherein, the first connecting part 141 and the second connecting part 142 together form a right-angle bending structure as the open space.

[0088] Taking the right-angle bending structure formed by the first connecting part 141 and the second connecting part 142 as the open space for accommodating the wrenching part 390 is more convenient for the installation of the oil cylinder anti-retreat device and the wrenching operation of the wrenching part 390.

[0089] As Figure 7 shown, optionally, the oil cylinder of the present utility model further includes a support member 160, and the support member 160 includes: a support plate 161, the support plate 161 is used to support the oil cylinder anti-retreat device; a connecting plate 162, the connecting plate 162 is formed as an arc-shaped plate that fits the oil cylinder body 110 and connects the support plate 161 with the oil cylinder body 110; a reinforcing rib 163, the reinforcing rib 163 is arranged between the support plate 161 and the connecting plate 162.

[0090] Specifically, the support plate 161 has a flat plate structure, and the connecting plate 162 is welded to the support plate 161. The connecting plate 162 is an arc-shaped plate and fits the outer peripheral edge of the oil cylinder body 110 to ensure the stable connection between the support member 160 and the oil cylinder body 110. The reinforcing rib 163 arranged between the support plate 161 and the connecting plate 162 can improve the strength of the support member 160 and provide stable support for the oil cylinder anti-retreat device.

[0091] Although the present utility model is disclosed as above, the present utility model is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the scope defined by the claims.

Claims

1. A driving structure for an oil cylinder anti-retreat device, characterized in that, The cylinder anti-retreat device includes a backing plate assembly (210), and the driving structure includes: A motor (310); A rotating shaft (320) that penetrates the backing plate assembly (210) and is used to drive the backing plate assembly (210) to flip by rotation; A reduction gear (400) that is arranged between the motor (310) and the rotating shaft (320) and is used to transmit the power of the motor (310) to the rotating shaft (320).

2. The drive structure according to claim 1, characterized in that The reduction gear (400) includes: A first gear (410) that is sleeved on the output shaft of the motor (310); A second gear (420) that is sleeved on the rotating shaft (320); Wherein, the output shaft of the motor (310) is parallel to the rotating shaft (320), and the first gear (410) and the second gear (420) are meshed with each other.

3. The drive structure according to claim 2, wherein The first gear (410) and at least a part of the motor (310) are arranged in the upper region of the second gear (420).

4. The drive structure according to claim 2, characterized in that, The axial width (W1) of the first gear (410) is greater than the axial width (W2) of the second gear (420).

5. The drive structure according to claim 2, characterized in that, The tooth number ratio between the first gear (410) and the second gear (420) is 250 to 350.

6. The drive structure according to any one of claims 1 to 5, characterized in that, The motor (310) is a turbine motor.

7. An oil cylinder anti-retreat device, characterized in that, The cylinder anti-retreat device includes: A backing plate assembly (210); The driving structure according to any one of claims 1 to 6; Wherein, the driving structure is used to drive the backing plate assembly (210) to flip so that the backing plate assembly (210) restricts the cylinder from retracting.

8. The oil cylinder anti-retreat device according to claim 7, characterized in that, The cylinder anti-retreat device further includes: An elastic driving part, the backing plate assembly (210) includes a plurality of anti-retreat backing plates, and the elastic driving part is arranged between at least one of the anti-retreat backing plates and the rotating shaft (320); Wherein, the elastic driving part is used to cooperate with the driving structure to drive at least one of the anti-retreat backing plates to tilt under the action of elastic force.

9. An oil cylinder, characterized in that, The cylinder includes: A cylinder body (110); A piston rod (120) that can expand and contract relative to the cylinder body (110); The cylinder anti-retreat device according to any one of claims 7 to 8; Wherein, the cylinder anti-retreat device is used to restrict the piston rod (120) from contracting relative to the cylinder body (110).

10. The oil cylinder according to claim 9, characterized in that, The cylinder further includes: A backing plate carrier (140) that is used to carry the cylinder anti-retreat device; Wherein, the backing plate assembly (210) and the reduction gear (400) are respectively arranged on the inner and outer sides of the backing plate carrier (140).

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