CN110761355B - Driving cylinder limiting device, driving cylinder assembly and engineering machinery - Google Patents

Abstract

The invention relates to the field of engineering machinery, in particular to a driving cylinder limiting device, a driving cylinder assembly and engineering machinery. The driving cylinder limiting device of the invention comprises: the first limiting device is provided with a limiting groove for accommodating a cylinder rod of the driving cylinder and is used for limiting the retraction displacement of the cylinder rod; and the second limiting device is arranged on the first limiting device and comprises a first limiting structure and a second limiting structure, wherein a combination state and a separation state are arranged between the first limiting structure and the second limiting structure, and when the second limiting structure is in the combination state, the second limiting device limits the cylinder rod to move in a direction away from the bottom of the limiting groove. Based on the added second limiting device, the invention can reduce the risk that the driving cylinder limiting device falls off from the driving cylinder and improve the working safety of the driving cylinder limiting device, the driving cylinder assembly and the engineering machinery.

Description

Driving cylinder limiting device, driving cylinder assembly and engineering machinery

Technical Field

The invention relates to the field of engineering machinery, in particular to a driving cylinder limiting device, a driving cylinder assembly and engineering machinery.

Background

In engineering vehicles such as loaders, a driving cylinder limiting device is generally arranged on a driving cylinder, and the driving cylinder is prevented from being retracted accidentally by a mechanical limiting mode, so that the safety problem caused by accidental falling of a heavy object is prevented.

In the related art, the drive cylinder stop device is directly buckled on the cylinder rod of the drive cylinder, and no other fixing device is arranged, or only a simple binding belt is used for winding and fixing, and the cylinder rod is prevented from retracting by directly contacting the end part of the limit groove with the cylinder rod, so that the work safety is lower and is mainly expressed in that: on the one hand, the driving cylinder limiting device is easy to fall off from the driving cylinder, potential safety hazards exist, the problem is particularly serious under high-speed working conditions, on the other hand, the area of the driving cylinder limiting device for being in contact with a cylinder rod is small, limiting reliability is affected, and damage to structural components such as a piston cylinder and the driving cylinder limiting device is easy to cause.

Disclosure of Invention

The invention provides a driving cylinder limiting device with higher working safety, a driving cylinder assembly and engineering machinery.

The invention provides a driving cylinder limiting device, which comprises:

the first limiting device is provided with a limiting groove for accommodating a cylinder rod of the driving cylinder and is used for limiting the retraction displacement of the cylinder rod; and

the second limiting device is arranged on the first limiting device and comprises a first limiting structure and a second limiting structure, a combination state and a separation state are arranged between the first limiting structure and the second limiting structure, and when the second limiting device is in the combination state, the second limiting device limits the cylinder rod to move towards the direction away from the bottom of the limiting groove.

In some embodiments, the first limit structure and the second limit structure are rotated and/or moved relative to each other to switch between the engaged state and the disengaged state.

In some embodiments, at least one of the first and second stop structures is rotatably disposed on the first stop device such that the first and second stop structures are switched between the engaged and disengaged states by relative rotation.

In some embodiments, the drive cylinder spacing device further comprises a hinge, and at least one of the first spacing structure and the second spacing structure is rotatably connected with the first spacing device by the hinge.

In some embodiments, the first and second limiting structures are hooked, snapped, or threaded when in the engaged state.

In some embodiments, the first limiting structure comprises a pressing block and a first hook member, the first hook member is rotatably connected to the first limiting device through the pressing block, the second limiting structure comprises a support and a second hook member matched with the first hook member, and the second hook member is connected with the first limiting device through the support.

In some embodiments, the second limiting structure further comprises a supporting structure, the second hook member is connected with the support through the supporting structure, and the supporting structure drives the second hook member to move towards a direction close to or away from the bottom of the limiting groove relative to the support.

In some embodiments, the supporting structure includes a first screw member and a second screw member, the first screw member is connected with the support, the second screw member is in threaded connection with the first screw member, and the second hook member is arranged on the second screw member, and when the second screw member is screwed, the second hook member is driven to move towards a direction close to or far away from the bottom of the limiting groove relative to the support.

In some embodiments, the support is rotatably connected to the first limiting device, and the second hook member is driven to be connected to or disconnected from the first hook member when the support rotates.

In some embodiments, the second limiting structure further includes an operation portion, and the support is provided with an opening, the operation portion is connected with the second hook member and extends out of the opening, and the operation portion is engaged with or disengaged from an outer edge of the opening when operated.

In some embodiments, the second limiting device is provided with an arc-shaped groove matched with the cylinder rod, and in a combined state, the second limiting device is contacted with the cylinder rod through the arc-shaped groove.

In some embodiments, the first limiting device includes a limiting seat and a limiting plate, the limiting groove is located on the limiting seat, and the limiting plate is disposed at least one of two ends of the limiting seat along the length direction of the limiting groove and extends towards the outer side of the limiting groove relative to the limiting seat.

In some embodiments, the shape of the limiting plate conforms to the cross-sectional shape of the limiting groove.

In some embodiments, the shape of the limiting plate and the cross-sectional shape of the limiting groove are both U-shaped.

In some embodiments, the driving cylinder limiting device further comprises an elastic pad, and the elastic pad is disposed on at least one of the groove bottom and the groove walls on both sides of the limiting groove.

The driving cylinder assembly comprises a driving cylinder and the driving cylinder limiting device.

In some embodiments, the drive cylinder is a cylinder or a cylinder.

The engineering machinery provided by the invention comprises the driving cylinder assembly.

By additionally arranging the second limiting device in the driving cylinder limiting device, the driving cylinder limiting device and the driving cylinder can be connected more reliably, the risk that the driving cylinder limiting device falls off from the driving cylinder is reduced, and therefore the working safety of the driving cylinder limiting device, the driving cylinder assembly and the engineering machinery is improved.

Other features of the present invention and its advantages will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 shows a schematic structural view of the drive cylinder assembly of the present invention.

Fig. 2 shows a schematic structural view of the driving cylinder limiting device in fig. 1.

Fig. 3 shows a schematic view of the first and second limit structures in a separated and combined state.

In the figure:

1. a drive cylinder limiting device;

11. a first limiting device; 11a, limit grooves; 111. a limit seat; 111a, a bottom plate; 111b, side plates; 112. a limiting plate; 112a, a first plate portion; 112b, a second plate portion; 112c, a third plate portion;

12. a second limiting device; 12a, a first limiting structure; 12b, a second limiting structure; 12c, a support structure; 12d, opening; 121. a hinge; 122. briquetting; 123. a first hook member; 124. a support; 125. a second hook member; 126. an arc-shaped groove; 127. an operation unit; 128. a first screw; 129. a second screw;

13. an elastic pad;

2. a drive cylinder; 21. a cylinder; 22. and (5) a cylinder rod.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by one of ordinary skill in the art without undue burden on the person of ordinary skill in the art based on embodiments of the present invention, are within the scope of the present invention.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for defining the components, and are merely for convenience in distinguishing the corresponding components, and the terms are not meant to have any special meaning unless otherwise indicated, so that the scope of the present invention is not to be construed as being limited.

In the description of the present invention, it should be understood that the azimuth or positional relationship indicated by azimuth words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., is generally based on the azimuth or positional relationship shown in the drawings; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself. And wherein "up" is a direction away from the bottom of the limit groove 11a, and "down" is a direction close to the bottom of the limit groove 11a.

In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.

Fig. 1-3 illustrate the construction of a drive cylinder assembly and a drive cylinder stop in an embodiment of the present invention.

Referring to fig. 1-3, the drive cylinder assembly comprises a drive cylinder 2 and a drive cylinder spacing device 1.

In a construction machine, such as a working vehicle, for example a loader, an scraper or an excavating loader, the drive cylinder 2 is used as an actuator, for example for driving to perform a weight lifting function. The drive cylinder 2 is, for example, an oil cylinder or a gas cylinder, and includes a cylinder tube 21 and a cylinder rod 22. Typically, the cylinder 21 is fixed and the rod 22 is extended or retracted relative to the cylinder 21 to effect lifting or dropping of the weight.

In certain conditions, such as maintenance, transportation, or driving, it may be desirable to maintain cylinder rod 22 in an extended position to meet the actual needs of the corresponding condition.

The driving cylinder limiting device 1 is used for preventing the driving cylinder 2 from retracting, so that when the cylinder rod 22 needs to be kept at a certain extending position, the cylinder rod 22 cannot retract due to leakage inside an oil cylinder or a valve block, defects or faults of a hydraulic system and the like, and the risk of unexpected falling of a heavy object is reduced.

In order to improve the working safety, the invention improves the structure of the driving cylinder limiting device 1.

Referring to fig. 1 to 3, in the present invention, a driving cylinder limiting device 1 includes:

a first limiting device 11 having a limiting groove 11a for receiving the cylinder rod 22 of the driving cylinder 2 and for limiting the retraction displacement of the cylinder rod 22; and

the second limiting device 12 is disposed on the first limiting device 11, and includes a first limiting structure 12a and a second limiting structure 12b, where a combined state and a separated state are provided between the first limiting structure 12a and the second limiting structure 12b, and when the second limiting device 12 is in the combined state, the second limiting device 12 limits the movement of the cylinder rod 22 in a direction away from the bottom of the limiting groove 11a.

Under the combined action of the first limiting device 11 and the second limiting device 12, the driving cylinder limiting device 1 not only can limit the retraction displacement of the cylinder rod 22, but also can limit the movement of the cylinder rod 22 in the direction away from the bottom of the limiting groove 11a, so that the combination reliability of the driving cylinder limiting device 1 and the driving cylinder 2 is increased relative to the condition that the driving cylinder limiting device 1 is directly buckled on the cylinder rod 22, the risk that the driving cylinder limiting device 1 falls off from the driving cylinder 2 is reduced, the working safety of the driving cylinder limiting device 1 can be effectively improved, and the driving cylinder limiting device 1 can more reliably play a role of preventing retraction.

In addition, the limiting of the movement of the cylinder rod 22 in the direction away from the bottom of the limiting groove 11a by the driving cylinder limiting device 1 is realized by detachably combining the first limiting structure 12a and the second limiting structure 12b which are arranged on the first limiting device 11, so that the driving cylinder limiting device is simple and compact in structure and high in use flexibility, when the driving cylinder limiting device 1 is required to prevent the cylinder rod 22 from retracting, the driving cylinder limiting device 1 and the cylinder rod 22 can be conveniently combined by combining the first limiting structure 12a and the second limiting structure 12b, and when the driving cylinder limiting device 1 is not required to limit the retraction of the cylinder rod 22, the driving cylinder limiting device 1 and the cylinder rod 22 can be conveniently separated by separating the first limiting structure 12a and the second limiting structure 12b, and the driving cylinder limiting device 1 is removed from the driving cylinder 2.

In some embodiments, the engagement and disengagement between the first and second limit structures 12a, 12b is achieved by relative rotation and/or relative movement therebetween, i.e., the first and second limit structures 12a, 12b are switched between the engaged and disengaged states by relative rotation and/or relative movement.

In order to realize the relative rotation of the first limiting structure 12a and the second limiting structure 12b, only one of the first limiting structure 12a and the second limiting structure 12b may be rotatably disposed on the first limiting device 1, or both may be rotatably disposed on the first limiting device 1, that is, at least one of the first limiting structure 12a and the second limiting structure 12b may be rotatably disposed on the first limiting device 11. In addition, the first limiting structure 12a and/or the second limiting structure 12b can be rotatably connected with the first limiting device 11 through the hinge 121, so that the structure is simplified, and the disassembly and assembly are convenient.

The relative movement of the first limiting structure 12a and the second limiting structure 12b may be, for example, relative expansion and contraction between the two, and by expanding one or both of the two relative to the first limiting device 11, the first limiting structure 12a and the second limiting structure 12b are relatively close to or far away from each other, so as to facilitate the combination or separation of the two.

In addition, in the present invention, there are various manners of combining the first limiting structure 12a and the second limiting structure 12b, for example, hooking connection, snap connection, or screw connection.

In addition, the invention improves the structure of the first limiting device 11 to solve the problem of lower safety caused by smaller contact area between the end part of the driving cylinder limiting device 1 and the cylinder rod 22, improves the retraction prevention effect by increasing the contact area between the end part of the driving cylinder limiting device 1 and the driving cylinder 2, reduces the damage to the driving cylinder 2, the driving cylinder limiting device 1 and other structural components, and improves the working safety.

Referring to fig. 1 to 3, in the present invention, the first limiting device 11 includes a limiting seat 111 and a limiting plate 112, the limiting groove 11a is located on the limiting seat 111, and the limiting plate 112 is disposed on at least one of two ends of the limiting seat 111 along the length direction of the limiting groove 11a and extends to the outside of the limiting groove 11a with respect to the limiting seat 111.

Through add the limiting plate 12 that extends to the limiting groove 11a outside at limiting groove 11a tip for first stop device 11 no longer directly comes into contact with actuating cylinder 2 through limiting groove 11a tip, but comes into contact with actuating cylinder 2 through the limiting plate 12 that the area is greater than limiting groove 11a tip area, effectively increases the area of contact between actuating cylinder stop device 1 tip and actuating cylinder 2, and this not only makes actuating cylinder stop device 1 can exert the shrink prevention effect more reliably, still is favorable to reducing destruction and damage to actuating cylinder 2 and actuating cylinder stop device 1, thereby is favorable to further improving the operational safety.

The invention will be further described with reference to the embodiments shown in fig. 1-3.

As shown in fig. 1-3, in this embodiment, the drive cylinder spacing device 1 comprises a first spacing device 11, a second spacing device 12 and an elastic pad 13.

The first limiting means 11 serves to carry the cylinder rod 22 and to limit the retraction displacement of the cylinder rod 22 so that the cylinder rod 22 can be maintained in a desired position when required. As shown in fig. 1 to 3, in this embodiment, the first limiting device 11 includes a limiting seat 111 and a limiting plate 112.

The limiting seat 111 includes a bottom plate 111a and two side plates 111b, and the two side plates 111b are connected to opposite ends of the bottom plate 111a, so that a limiting groove 11a is formed between the bottom plate 111a and the two side plates 111 b. The limiting groove 11a accommodates the cylinder rod 22, and has a longitudinal direction aligned with an axial direction of the cylinder rod 22. Specifically, as can be seen from fig. 2, in this embodiment, the cross-sectional shape of the limiting groove 11a is U-shaped, and in this case, the limiting seat 111 is made of, for example, U-shaped steel.

The elastic pad 13, such as a rubber pad, is disposed in the limiting groove 11a and is used for contacting with the cylinder rod 22, so that flexible contact is formed between the cylinder rod 22 and the limiting groove 11a, and abrasion between the two is reduced. As shown in fig. 1 to 3, in this embodiment, the elastic pads 13 are provided on the bottom (bottom plate 111 a) and both side walls (side plates 111 b) of the limit groove 11a, which makes flexible contact between the cylinder rod 22 and any of the walls of the limit groove 11a, and can prevent abrasion more effectively. However, it should be understood that in other embodiments, the elastic pad 13 is only disposed on one or both of the groove bottom and the groove walls of the limiting groove 11a, which also can play a role in preventing wear.

Referring to fig. 3, in this embodiment, the distance between the elastic pads 13 on the groove walls on both sides (which may be simply referred to as the span) is set to be just slightly smaller than the diameter of the cylinder rod 22, so that, in use, the elastic pads 13 can squeeze the cylinder rod 22 to prevent the relative rotation between the first limiting device 11 and the cylinder rod 22, so that the driving cylinder limiting device 1 can more reliably exert the retraction preventing effect.

A stopper plate 112 is provided at an end portion of the stopper groove 11a in the longitudinal direction for restricting the retraction displacement of the cylinder rod 22 by contact with the drive cylinder 2. As shown in fig. 2, in this embodiment, the stopper plate 112 includes a first plate portion 112a, a second plate portion 112b, and a third plate portion 112c, the first plate portion 112a is located at the groove bottom of the stopper groove 11a, the second plate portion 112b and the third plate portion 112c are connected to opposite ends of the first plate portion 112a and correspond to both side groove walls of the stopper groove 11a, respectively, and the first plate portion 112a, the second plate portion 112b, and the third plate portion 112c extend outward with respect to the groove bottom and both side groove walls of the stopper groove 11a, respectively, i.e., the widths of the first plate portion 112a, the second plate portion 112b, and the third plate portion 112c are larger than the thicknesses of the bottom plate 111a and the both side plates 111b, respectively. Specifically, the first plate portion 112a, the second plate portion 112b, and the third plate portion 112c are connected to form a U-shape. And both ends of the limit groove 11a in the length direction are provided with limit plates 112.

As shown in fig. 1, in use, the first limiting device 11 contacts the open end of the cylinder 21 and the club head of the cylinder rod 22 through two limiting plates 112, so as to prevent the cylinder rod 22 from retracting continuously.

Because the limiting plate 112 extends towards the outer side of the limiting groove 11a relative to the limiting seat 111, the area of the limiting plate 112 is larger than the area of the end part of the limiting groove 11a, and therefore, compared with the condition that the end part of the limiting groove 11a is directly contacted with the driving cylinder 2, the stress area of the end part can be effectively increased, thereby being beneficial to improving the retraction prevention effect and reducing the damage to the driving cylinder 2 and the driving cylinder limiting device 1.

In addition, the shape of the limiting plate 112 is consistent with the end shape of the limiting groove 11a, and the limiting plate 112 is in a U shape, so that the limiting plate 112 can be fully contacted with the driving cylinder 2, and the stress area of the end part is effectively increased.

In other embodiments, the limiting plate 112 may include only one or two of the first plate portion 112a, the second plate portion 112b, and the third plate portion 112c, or the limiting plate 112 may be disposed at only one of two ends of the limiting groove 11a in the length direction.

The second limiting device 12 is disposed on the first limiting device 11, and is used for limiting the movement of the cylinder rod 22 in a direction away from the bottom of the limiting groove 11a, so as to prevent the driving cylinder limiting device 1 from falling off from the driving cylinder 2. As shown in fig. 1 to 3, in this embodiment, the second limiting device 12 includes a first limiting structure 12a and a second limiting structure 12b, the first limiting structure 12a and the second limiting structure 12b are disposed on two side plates 111b opposite to each other, the first limiting structure 12a is rotatably connected to the side plates 111b and combined with or separated from the second limiting structure 12b during rotation, and the combination with the second limiting structure 12b limits the movement of the cylinder rod 22 in a direction away from the bottom of the limiting groove 11a (simply referred to as the slotter movement of the cylinder rod 22).

Specifically, in this embodiment, the first limiting structure 12a rotates between the first position and the second position, and in the first position, the first position is hooked with the second limiting structure 12b to achieve the combination with the second limiting structure 12b and the limitation of the groove removal movement of the cylinder rod 22, and in the second position, the first limiting structure is separated from the second limiting structure 12b to release the limitation of the groove removal movement of the cylinder rod 22.

More specifically, the first limiting structure 12a includes a pressing block 122 and a first hooking member 123, the first hooking member 123 is rotatably connected to the first limiting device 11 (specifically, the side plate 111 b) through the pressing block 122, the second limiting structure 12b includes a support 124 and a second hooking member 125 mated with the first hooking member 123, and the second hooking member 125 is connected to the first limiting device 11 (specifically, the side plate 111 b) through the support 124. The pressing block 122 is rotatably connected with the side plate 111b through a hinge 121, and drives the first hook 123 to move between the first position and the second position. The first position is a position (shown by a broken line in fig. 3) at the top of the limit groove 11a and parallel to the groove bottom. The second position is a position (shown by a solid line in fig. 3) located outside the limit groove 11a and having an angle of 90 ° or more with the groove bottom. As shown in fig. 3, when in the first position, the pressing block 122 is bridged across the top of the two side plates 111b, and the first hooking member 123 is hooked with the second hooking member 125.

Based on the above arrangement, the different requirements of combining and separating the driving cylinder limiting device 1 and the driving cylinder 2 can be met only by rotating the pressing block 122 and hooking or unhooking the first hooking member 123 and the second hooking member 125, and the driving cylinder limiting device is flexible and convenient. Wherein, in the first position, the pressing block 122 is pressed on the cylinder rod 22, and is locked by the first hooking member 123 and the second hooking member 125 which are hooked together, and cannot rotate to the second position, so that the driving cylinder limiting device 1 can be reliably installed on the cylinder rod 22 together with the inner wall of the limiting groove 11a, the risk that the driving cylinder limiting device 1 falls off from the cylinder rod 22 due to vibration and other reasons is reduced, and the driving cylinder limiting device is beneficial to eliminating potential safety hazards caused by unexpected falling off of the driving cylinder limiting device 1 and improving the working safety. In the second position, the first limiting structure 12a rotates to the outside of the limiting seat 111, so that the groove-removing movement of the cylinder rod 22 is not limited, and the driving cylinder limiting device 1 and the cylinder rod 22 can be conveniently separated, and the driving cylinder limiting device 1 can be smoothly removed from the cylinder rod 22.

Since the combination reliability of the driving cylinder limiting device 1 and the cylinder rod 22 is effectively improved under the action of the second limiting device 12, the driving cylinder limiting device 1 is not easy to fall off even under the high-speed working condition, but can still reliably play a role in preventing retraction, and therefore, the driving cylinder limiting device 1 of the embodiment is not limited to the low-speed working condition any more, but is particularly suitable for the high-speed working condition. It can be seen that this embodiment is also advantageous for expanding the application range of the drive cylinder limitation device 1.

Also, as shown in fig. 3, in this embodiment, an arc-shaped groove 126 is provided on the lower surface of the pressing block 122, the arc-shaped groove 126 being adapted to the shape of the cylinder rod 22, and in the first position, the arc-shaped groove 126 is in contact with the cylinder rod 22. By providing the arc-shaped groove 126 adapted to the cylinder rod 22 on the second limiting device 12 and utilizing the arc-shaped groove 126 to contact the cylinder rod 22 in the combined state, the contact area between the second limiting device 12 and the cylinder rod 22 in the combined state is increased, so that the second limiting device 12 can more reliably limit the cylinder rod 22 in the limiting groove 11a in the combined state, and the two are prevented from being separated.

In addition, as shown in fig. 3, in this embodiment, the hook portion of the first hooking member 123 is opened upward, and the hook portion of the second hooking member 125 is opened downward. In order to facilitate the hooking and unhooking between the two, as shown in fig. 1 and 3, the support 124 is rotatably connected to the first limiting device 11, and the second hooking member 125 can be driven to be connected to or disconnected from the first hooking member 123 when the support 124 rotates. Specifically, the support 124 is rotatably connected to the first limiting device 11 by being hinged to the side plate 111 b. The second hooking member 125 is rotatably disposed on the support 124, so that the second hooking member 125 is driven to connect with or disconnect from the first hooking member 123 when the support 124 rotates. Under this condition, through the swivel support 124, the connection or disconnection between the first hook 123 and the second hook 125 can be conveniently realized, the operation is simple, and interference between the first hook 123 and the second hook 125 in the rotation process of the first limit structure 12a is avoided, so that the smooth combination and separation between the first limit structure 12a and the second limit structure 12b can be conveniently realized.

As shown in fig. 3, the second limiting device 12 further includes an operation portion 127, the support 124 is provided with an opening 12d, the operation portion 127 is connected to the second hook 125 and extends out of the opening 12d, and the operation portion 127 is engaged with or disengaged from an outer edge of the opening 12d when operated.

Based on the above arrangement, when the first limiting structure 12a and the second limiting structure 12b are required to be kept in a combined state, the operation portion 127 can be clamped at the outer edge of the opening 12d, the second hooking member 125 and the support 124 are locked together, the support 124 is prevented from being undesirably rotated, and the first hooking member 123 and the second hooking member 125 are prevented from being accidentally separated, on the other hand, when the first limiting structure 12a and the second limiting structure 12b are required to be switched to a separated body, the operation portion 127 can be operated, and release of the support 124 is realized by releasing the clamping of the operation portion 127 and the outer edge of the opening 12d, so that the second hooking member 125 and the first hooking member 123 can be separated by rotating the support 124, and further, the first limiting structure 12a is conveniently rotated to a second position, and the first limiting structure 12a and the second limiting structure 12b are switched to the separated body.

It can be seen that the operation portion 127 is provided, which not only improves the combination stability of the first limiting structure 12a and the second limiting structure 12b at the first position, but also facilitates the detachment of the first hook 123 and the second hook 125 by rotating the support 124.

Wherein the operation portion 127 protrudes from the opening 12d, which is also more convenient for the worker to apply the operation thereto. The operation portion 127 may be a pressing portion or a toggle portion. For example, the operation portion 127 is configured as a spring, and at this time, it is only necessary to press the operation portion 127 to control whether the second hook 125 is locked with the support 124. Alternatively, the operating portion 127 is configured as a dial, at which time whether to lock the second hooking portion 125 with the holder 124 is controlled by toggling the operating portion 127.

In addition, as shown in fig. 3, in this embodiment, the second hooking member 125 is connected to the support 124 through the support structure 12c, and the support structure 12c is configured to drive the second hooking member 125 to move up and down with respect to the support 124 (i.e., to move toward or away from the bottom of the limit groove 11a with respect to the support 124). Specifically, the support structure 12c of this embodiment includes a first screw 128 and a second screw 129, the first screw 128 (e.g., a screw) is connected (e.g., hinged) to the support 124, the second screw 129 (e.g., a nut) is screwed to the first screw 128, and the second hooking member 125 is disposed on the second screw 129. Based on this, through screwing the second screw 129, the second hooking member 125 can be driven to move up and down relative to the support 124, so as to adjust the height position of the second hooking member 125, and when the height position of the first hooking member 123 when the pressing block 122 is at the first position is changed, the reliable connection between the first hooking member 123 and the second hooking member 125 can be ensured by adjusting the height position of the second hooking member 125. It can be seen that the support structure 12c is configured to drive the second hooking member 125 to move up and down relative to the support 124, so that the second hooking member 125 can flexibly meet the connection requirement of the first hooking member 123 with different height positions.

Based on this embodiment, when it is required to prevent the retraction of the cylinder rod 22, only the limiting seat 111 is fastened to the cylinder rod 22, then the pressing block 122 is rotated to the first position, the operating portion 127 is pressed, and the support 124 is rotated, so that the first hooking member 123 is hooked and connected with the second hooking member 125, the driving cylinder limiting device 1 can be fixed on the cylinder rod 22, the cylinder rod 22 is prevented from retracting by using the driving cylinder limiting device 1, and when it is not required to prevent the retraction of the cylinder rod 22, only the operating portion 127 is pressed again, and the support 124 is rotated, so that the first hooking member 123 is disengaged from the second hooking member 125, and then the pressing block 122 is rotated from the first position to the second position, so that the driving cylinder limiting device 1 can be removed from the cylinder rod 22. And, when the height position of the first hooking member 123 is changed when the pressing block 122 is at the first position due to long-term use deformation or replacement of the first hooking member 123, the second hooking member 125 can be adjusted to the height position still capable of being connected with the first hooking member 123 by screwing the second screw member 129, so that smooth hooking connection is ensured.

Therefore, the driving cylinder limiting device 1 is simple and compact in structure, convenient to operate and high in safety, reliable installation on the driving cylinder 2 under a high-speed working condition can be achieved, falling is not easy to occur, the contact area between the end part and the driving cylinder 2 is large, and the anti-retraction effect is good.

The above description is illustrative of the present invention and is not intended to be limiting, but is intended to cover all modifications, equivalents, alternatives, and improvements within the spirit and principles of the invention.

Claims (16)

1. A drive cylinder limiter (1), characterized by comprising:

a first limiting device (11) having a limiting groove (11 a) for accommodating a cylinder rod (22) of a drive cylinder (2) and for limiting the retraction displacement of the cylinder rod (22); and

the second limiting device (12) is arranged on the first limiting device (11) and comprises a first limiting structure (12 a) and a second limiting structure (12 b), a combination state and a separation state are arranged between the first limiting structure (12 a) and the second limiting structure (12 b), when the second limiting device (12) is in the combination state, the second limiting device (12) limits the cylinder rod (22) to move away from the bottom of the limiting groove (11 a), wherein when the second limiting device is in the combination state, the first limiting structure (12 a) and the second limiting structure (12 b) are hooked, buckled or connected in a threaded mode, and the second limiting device (12) is provided with an arc groove (126) matched with the cylinder rod (22), and when the second limiting device (12) is in the combination state, the second limiting device (12) is in contact with the cylinder rod (22) through the arc groove (126).

2. The drive cylinder limiter arrangement (1) according to claim 1, characterized in that the first limit structure (12 a) and the second limit structure (12 b) are rotated and/or moved relatively for switching between the engaged state and the disengaged state.

3. The drive cylinder limiter device (1) according to claim 2, wherein at least one of the first limit structure (12 a) and the second limit structure (12 b) is rotatably provided on the first limit device (11) such that the first limit structure (12 a) and the second limit structure (12 b) are switched between the engaged state and the disengaged state by relative rotation.

4. A drive cylinder limiter arrangement (1) according to claim 3, characterized in that the drive cylinder limiter arrangement (1) further comprises a hinge (121), at least one of the first limit structure (12 a) and the second limit structure (12 b) being rotatably connected with the first limit arrangement (11) by means of the hinge (121).

5. The driving cylinder limiting device (1) according to claim 1, wherein the first limiting structure (12 a) comprises a pressing block (122) and a first hooking member (123), the first hooking member (123) is rotatably connected to the first limiting device (11) through the pressing block (122), the second limiting structure (12 b) comprises a support (124) and a second hooking member (125) matched with the first hooking member (123), and the second hooking member (125) is connected with the first limiting device (11) through the support (124).

6. The drive cylinder spacing device (1) according to claim 5, characterized in that the second spacing structure (12 b) further comprises a support structure (12 c), the second hooking member (125) is connected to the support (124) by the support structure (12 c), and the support structure (12 c) drives the second hooking member (125) to move relative to the support (124) in a direction approaching or moving away from the bottom of the spacing groove (11 a).

7. The drive cylinder limiter (1) according to claim 6, wherein the support structure (12 c) comprises a first screw (128) and a second screw (129), the first screw (128) is connected to the support (124), the second screw (129) is screwed to the first screw (128), and the second hooking member (125) is provided on the second screw (129), and when the second screw (129) is screwed, the second hooking member (125) is driven to move toward or away from the bottom of the limit groove (11 a) with respect to the support (124).

8. The drive cylinder limiter (1) according to claim 5, wherein the support (124) is rotatably connected to the first limiter (11), and the second hooking member (125) is driven to be connected to or disconnected from the first hooking member (123) when the support (124) rotates.

9. The driving cylinder limiting device (1) according to claim 8, wherein the second limiting structure (12 b) further comprises an operation portion (127), an opening (12 d) is formed in the support (124), the operation portion (127) is connected with the second hook member (125) and extends out of the opening (12 d), and the operation portion (127) is engaged with or disengaged from an outer edge of the opening (12 d) when operated.

10. The driving cylinder limiting device (1) according to any one of claims 1-9, wherein the first limiting device (11) comprises a limiting seat (111) and a limiting plate (112), the limiting groove (11 a) is located on the limiting seat (111), and the limiting plate (112) is arranged on at least one of two ends of the limiting seat (111) along the length direction of the limiting groove (11 a) and extends to the outer side of the limiting groove (11 a) relative to the limiting seat (111).

11. The drive cylinder limiter (1) according to claim 10, characterized in that the shape of the limiting plate (112) corresponds to the cross-sectional shape of the limiting groove (11 a).

12. The drive cylinder limiter (1) according to claim 11, characterized in that the limiting plate (112) and the limiting groove (11 a) are both U-shaped in cross-section.

13. The drive cylinder stop device (1) according to any one of claims 1-9, characterized in that the drive cylinder stop device (1) further comprises an elastic pad (13), the elastic pad (13) being arranged on at least one of the groove bottom and the groove walls of both sides of the stop groove (11 a).

14. A drive cylinder assembly comprising a drive cylinder (2), characterized by further comprising a drive cylinder limiter (1) according to any one of claims 1-13.

15. The drive cylinder assembly according to claim 14, characterized in that the drive cylinder (2) is an oil cylinder or a gas cylinder.

16. A working machine comprising a drive cylinder assembly according to claim 14 or 15.